1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
4 /******************************************************************************
5 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
6 ******************************************************************************/
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
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>
27 #include <linux/if_vlan.h>
28 #include <linux/prefetch.h>
30 #include <linux/bpf.h>
31 #include <linux/bpf_trace.h>
32 #include <linux/atomic.h>
37 const char ixgbevf_driver_name[] = "ixgbevf";
38 static const char ixgbevf_driver_string[] =
39 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
41 static char ixgbevf_copyright[] =
42 "Copyright (c) 2009 - 2018 Intel Corporation.";
44 static 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,
56 /* ixgbevf_pci_tbl - PCI Device ID Table
58 * Wildcard entries (PCI_ANY_ID) should come last
59 * Last entry must be all 0s
61 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
62 * Class, Class Mask, private data (not used) }
64 static 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 */
77 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
79 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
80 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
81 MODULE_LICENSE("GPL v2");
83 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
84 static int debug = -1;
85 module_param(debug, int, 0);
86 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
88 static struct workqueue_struct *ixgbevf_wq;
90 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
92 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
93 !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
94 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
95 queue_work(ixgbevf_wq, &adapter->service_task);
98 static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
100 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
102 /* flush memory to make sure state is correct before next watchdog */
103 smp_mb__before_atomic();
104 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
108 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
109 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
110 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
111 static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer);
112 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
113 struct ixgbevf_rx_buffer *old_buff);
115 static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
117 struct ixgbevf_adapter *adapter = hw->back;
122 dev_err(&adapter->pdev->dev, "Adapter removed\n");
123 if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
124 ixgbevf_service_event_schedule(adapter);
127 static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
131 /* The following check not only optimizes a bit by not
132 * performing a read on the status register when the
133 * register just read was a status register read that
134 * returned IXGBE_FAILED_READ_REG. It also blocks any
135 * potential recursion.
137 if (reg == IXGBE_VFSTATUS) {
138 ixgbevf_remove_adapter(hw);
141 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
142 if (value == IXGBE_FAILED_READ_REG)
143 ixgbevf_remove_adapter(hw);
146 u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
148 u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
151 if (IXGBE_REMOVED(reg_addr))
152 return IXGBE_FAILED_READ_REG;
153 value = readl(reg_addr + reg);
154 if (unlikely(value == IXGBE_FAILED_READ_REG))
155 ixgbevf_check_remove(hw, reg);
160 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
161 * @adapter: pointer to adapter struct
162 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
163 * @queue: queue to map the corresponding interrupt to
164 * @msix_vector: the vector to map to the corresponding queue
166 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
167 u8 queue, u8 msix_vector)
170 struct ixgbe_hw *hw = &adapter->hw;
172 if (direction == -1) {
174 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
175 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
178 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
180 /* Tx or Rx causes */
181 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
182 index = ((16 * (queue & 1)) + (8 * direction));
183 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
184 ivar &= ~(0xFF << index);
185 ivar |= (msix_vector << index);
186 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
190 static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
192 return ring->stats.packets;
195 static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
197 struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
198 struct ixgbe_hw *hw = &adapter->hw;
200 u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
201 u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
204 return (head < tail) ?
205 tail - head : (tail + ring->count - head);
210 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
212 u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
213 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
214 u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
216 clear_check_for_tx_hang(tx_ring);
218 /* Check for a hung queue, but be thorough. This verifies
219 * that a transmit has been completed since the previous
220 * check AND there is at least one packet pending. The
221 * ARMED bit is set to indicate a potential hang.
223 if ((tx_done_old == tx_done) && tx_pending) {
224 /* make sure it is true for two checks in a row */
225 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
228 /* reset the countdown */
229 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
231 /* update completed stats and continue */
232 tx_ring->tx_stats.tx_done_old = tx_done;
237 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
239 /* Do the reset outside of interrupt context */
240 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
241 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
242 ixgbevf_service_event_schedule(adapter);
247 * ixgbevf_tx_timeout - Respond to a Tx Hang
248 * @netdev: network interface device structure
249 * @txqueue: transmit queue hanging (unused)
251 static void ixgbevf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
253 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
255 ixgbevf_tx_timeout_reset(adapter);
259 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
260 * @q_vector: board private structure
261 * @tx_ring: tx ring to clean
262 * @napi_budget: Used to determine if we are in netpoll
264 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
265 struct ixgbevf_ring *tx_ring, int napi_budget)
267 struct ixgbevf_adapter *adapter = q_vector->adapter;
268 struct ixgbevf_tx_buffer *tx_buffer;
269 union ixgbe_adv_tx_desc *tx_desc;
270 unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;
271 unsigned int budget = tx_ring->count / 2;
272 unsigned int i = tx_ring->next_to_clean;
274 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
277 tx_buffer = &tx_ring->tx_buffer_info[i];
278 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
282 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
284 /* if next_to_watch is not set then there is no work pending */
288 /* prevent any other reads prior to eop_desc */
291 /* if DD is not set pending work has not been completed */
292 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
295 /* clear next_to_watch to prevent false hangs */
296 tx_buffer->next_to_watch = NULL;
298 /* update the statistics for this packet */
299 total_bytes += tx_buffer->bytecount;
300 total_packets += tx_buffer->gso_segs;
301 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)
305 if (ring_is_xdp(tx_ring))
306 page_frag_free(tx_buffer->data);
308 napi_consume_skb(tx_buffer->skb, napi_budget);
310 /* unmap skb header data */
311 dma_unmap_single(tx_ring->dev,
312 dma_unmap_addr(tx_buffer, dma),
313 dma_unmap_len(tx_buffer, len),
316 /* clear tx_buffer data */
317 dma_unmap_len_set(tx_buffer, len, 0);
319 /* unmap remaining buffers */
320 while (tx_desc != eop_desc) {
326 tx_buffer = tx_ring->tx_buffer_info;
327 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
330 /* unmap any remaining paged data */
331 if (dma_unmap_len(tx_buffer, len)) {
332 dma_unmap_page(tx_ring->dev,
333 dma_unmap_addr(tx_buffer, dma),
334 dma_unmap_len(tx_buffer, len),
336 dma_unmap_len_set(tx_buffer, len, 0);
340 /* move us one more past the eop_desc for start of next pkt */
346 tx_buffer = tx_ring->tx_buffer_info;
347 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
350 /* issue prefetch for next Tx descriptor */
353 /* update budget accounting */
355 } while (likely(budget));
358 tx_ring->next_to_clean = i;
359 u64_stats_update_begin(&tx_ring->syncp);
360 tx_ring->stats.bytes += total_bytes;
361 tx_ring->stats.packets += total_packets;
362 u64_stats_update_end(&tx_ring->syncp);
363 q_vector->tx.total_bytes += total_bytes;
364 q_vector->tx.total_packets += total_packets;
365 adapter->tx_ipsec += total_ipsec;
367 if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
368 struct ixgbe_hw *hw = &adapter->hw;
369 union ixgbe_adv_tx_desc *eop_desc;
371 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
373 pr_err("Detected Tx Unit Hang%s\n"
375 " TDH, TDT <%x>, <%x>\n"
376 " next_to_use <%x>\n"
377 " next_to_clean <%x>\n"
378 "tx_buffer_info[next_to_clean]\n"
379 " next_to_watch <%p>\n"
380 " eop_desc->wb.status <%x>\n"
381 " time_stamp <%lx>\n"
383 ring_is_xdp(tx_ring) ? " XDP" : "",
384 tx_ring->queue_index,
385 IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
386 IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
387 tx_ring->next_to_use, i,
388 eop_desc, (eop_desc ? eop_desc->wb.status : 0),
389 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
391 if (!ring_is_xdp(tx_ring))
392 netif_stop_subqueue(tx_ring->netdev,
393 tx_ring->queue_index);
395 /* schedule immediate reset if we believe we hung */
396 ixgbevf_tx_timeout_reset(adapter);
401 if (ring_is_xdp(tx_ring))
404 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
405 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
406 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
407 /* Make sure that anybody stopping the queue after this
408 * sees the new next_to_clean.
412 if (__netif_subqueue_stopped(tx_ring->netdev,
413 tx_ring->queue_index) &&
414 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
415 netif_wake_subqueue(tx_ring->netdev,
416 tx_ring->queue_index);
417 ++tx_ring->tx_stats.restart_queue;
425 * ixgbevf_rx_skb - Helper function to determine proper Rx method
426 * @q_vector: structure containing interrupt and ring information
427 * @skb: packet to send up
429 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
432 napi_gro_receive(&q_vector->napi, skb);
435 #define IXGBE_RSS_L4_TYPES_MASK \
436 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
437 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
438 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
439 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
441 static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
442 union ixgbe_adv_rx_desc *rx_desc,
447 if (!(ring->netdev->features & NETIF_F_RXHASH))
450 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
451 IXGBE_RXDADV_RSSTYPE_MASK;
456 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
457 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
458 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
462 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
463 * @ring: structure containig ring specific data
464 * @rx_desc: current Rx descriptor being processed
465 * @skb: skb currently being received and modified
467 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
468 union ixgbe_adv_rx_desc *rx_desc,
471 skb_checksum_none_assert(skb);
473 /* Rx csum disabled */
474 if (!(ring->netdev->features & NETIF_F_RXCSUM))
477 /* if IP and error */
478 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
479 ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
480 ring->rx_stats.csum_err++;
484 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
487 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
488 ring->rx_stats.csum_err++;
492 /* It must be a TCP or UDP packet with a valid checksum */
493 skb->ip_summed = CHECKSUM_UNNECESSARY;
497 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
498 * @rx_ring: rx descriptor ring packet is being transacted on
499 * @rx_desc: pointer to the EOP Rx descriptor
500 * @skb: pointer to current skb being populated
502 * This function checks the ring, descriptor, and packet information in
503 * order to populate the checksum, VLAN, protocol, and other fields within
506 static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
507 union ixgbe_adv_rx_desc *rx_desc,
510 ixgbevf_rx_hash(rx_ring, rx_desc, skb);
511 ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
513 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
514 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
515 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
517 if (test_bit(vid & VLAN_VID_MASK, active_vlans))
518 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
521 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))
522 ixgbevf_ipsec_rx(rx_ring, rx_desc, skb);
524 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
528 struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring,
529 const unsigned int size)
531 struct ixgbevf_rx_buffer *rx_buffer;
533 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
534 prefetchw(rx_buffer->page);
536 /* we are reusing so sync this buffer for CPU use */
537 dma_sync_single_range_for_cpu(rx_ring->dev,
539 rx_buffer->page_offset,
543 rx_buffer->pagecnt_bias--;
548 static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring,
549 struct ixgbevf_rx_buffer *rx_buffer,
552 if (ixgbevf_can_reuse_rx_page(rx_buffer)) {
553 /* hand second half of page back to the ring */
554 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
557 /* We are not reusing the buffer so unmap it and free
558 * any references we are holding to it
560 dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
561 ixgbevf_rx_pg_size(rx_ring),
563 IXGBEVF_RX_DMA_ATTR);
564 __page_frag_cache_drain(rx_buffer->page,
565 rx_buffer->pagecnt_bias);
568 /* clear contents of rx_buffer */
569 rx_buffer->page = NULL;
573 * ixgbevf_is_non_eop - process handling of non-EOP buffers
574 * @rx_ring: Rx ring being processed
575 * @rx_desc: Rx descriptor for current buffer
577 * This function updates next to clean. If the buffer is an EOP buffer
578 * this function exits returning false, otherwise it will place the
579 * sk_buff in the next buffer to be chained and return true indicating
580 * that this is in fact a non-EOP buffer.
582 static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
583 union ixgbe_adv_rx_desc *rx_desc)
585 u32 ntc = rx_ring->next_to_clean + 1;
587 /* fetch, update, and store next to clean */
588 ntc = (ntc < rx_ring->count) ? ntc : 0;
589 rx_ring->next_to_clean = ntc;
591 prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
593 if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
599 static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)
601 return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;
604 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
605 struct ixgbevf_rx_buffer *bi)
607 struct page *page = bi->page;
610 /* since we are recycling buffers we should seldom need to alloc */
614 /* alloc new page for storage */
615 page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring));
616 if (unlikely(!page)) {
617 rx_ring->rx_stats.alloc_rx_page_failed++;
621 /* map page for use */
622 dma = dma_map_page_attrs(rx_ring->dev, page, 0,
623 ixgbevf_rx_pg_size(rx_ring),
624 DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR);
626 /* if mapping failed free memory back to system since
627 * there isn't much point in holding memory we can't use
629 if (dma_mapping_error(rx_ring->dev, dma)) {
630 __free_pages(page, ixgbevf_rx_pg_order(rx_ring));
632 rx_ring->rx_stats.alloc_rx_page_failed++;
638 bi->page_offset = ixgbevf_rx_offset(rx_ring);
639 bi->pagecnt_bias = 1;
640 rx_ring->rx_stats.alloc_rx_page++;
646 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
647 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
648 * @cleaned_count: number of buffers to replace
650 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
653 union ixgbe_adv_rx_desc *rx_desc;
654 struct ixgbevf_rx_buffer *bi;
655 unsigned int i = rx_ring->next_to_use;
657 /* nothing to do or no valid netdev defined */
658 if (!cleaned_count || !rx_ring->netdev)
661 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
662 bi = &rx_ring->rx_buffer_info[i];
666 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
669 /* sync the buffer for use by the device */
670 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
672 ixgbevf_rx_bufsz(rx_ring),
675 /* Refresh the desc even if pkt_addr didn't change
676 * because each write-back erases this info.
678 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
684 rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
685 bi = rx_ring->rx_buffer_info;
689 /* clear the length for the next_to_use descriptor */
690 rx_desc->wb.upper.length = 0;
693 } while (cleaned_count);
697 if (rx_ring->next_to_use != i) {
698 /* record the next descriptor to use */
699 rx_ring->next_to_use = i;
701 /* update next to alloc since we have filled the ring */
702 rx_ring->next_to_alloc = i;
704 /* Force memory writes to complete before letting h/w
705 * know there are new descriptors to fetch. (Only
706 * applicable for weak-ordered memory model archs,
710 ixgbevf_write_tail(rx_ring, i);
715 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
716 * @rx_ring: rx descriptor ring packet is being transacted on
717 * @rx_desc: pointer to the EOP Rx descriptor
718 * @skb: pointer to current skb being fixed
720 * Check for corrupted packet headers caused by senders on the local L2
721 * embedded NIC switch not setting up their Tx Descriptors right. These
722 * should be very rare.
724 * Also address the case where we are pulling data in on pages only
725 * and as such no data is present in the skb header.
727 * In addition if skb is not at least 60 bytes we need to pad it so that
728 * it is large enough to qualify as a valid Ethernet frame.
730 * Returns true if an error was encountered and skb was freed.
732 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
733 union ixgbe_adv_rx_desc *rx_desc,
736 /* XDP packets use error pointer so abort at this point */
740 /* verify that the packet does not have any known errors */
741 if (unlikely(ixgbevf_test_staterr(rx_desc,
742 IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
743 struct net_device *netdev = rx_ring->netdev;
745 if (!(netdev->features & NETIF_F_RXALL)) {
746 dev_kfree_skb_any(skb);
751 /* if eth_skb_pad returns an error the skb was freed */
752 if (eth_skb_pad(skb))
759 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
760 * @rx_ring: rx descriptor ring to store buffers on
761 * @old_buff: donor buffer to have page reused
763 * Synchronizes page for reuse by the adapter
765 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
766 struct ixgbevf_rx_buffer *old_buff)
768 struct ixgbevf_rx_buffer *new_buff;
769 u16 nta = rx_ring->next_to_alloc;
771 new_buff = &rx_ring->rx_buffer_info[nta];
773 /* update, and store next to alloc */
775 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
777 /* transfer page from old buffer to new buffer */
778 new_buff->page = old_buff->page;
779 new_buff->dma = old_buff->dma;
780 new_buff->page_offset = old_buff->page_offset;
781 new_buff->pagecnt_bias = old_buff->pagecnt_bias;
784 static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer)
786 unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
787 struct page *page = rx_buffer->page;
789 /* avoid re-using remote and pfmemalloc pages */
790 if (!dev_page_is_reusable(page))
793 #if (PAGE_SIZE < 8192)
794 /* if we are only owner of page we can reuse it */
795 if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))
798 #define IXGBEVF_LAST_OFFSET \
799 (SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBEVF_RXBUFFER_2048)
801 if (rx_buffer->page_offset > IXGBEVF_LAST_OFFSET)
806 /* If we have drained the page fragment pool we need to update
807 * the pagecnt_bias and page count so that we fully restock the
808 * number of references the driver holds.
810 if (unlikely(!pagecnt_bias)) {
811 page_ref_add(page, USHRT_MAX);
812 rx_buffer->pagecnt_bias = USHRT_MAX;
819 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
820 * @rx_ring: rx descriptor ring to transact packets on
821 * @rx_buffer: buffer containing page to add
822 * @skb: sk_buff to place the data into
823 * @size: size of buffer to be added
825 * This function will add the data contained in rx_buffer->page to the skb.
827 static void ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
828 struct ixgbevf_rx_buffer *rx_buffer,
832 #if (PAGE_SIZE < 8192)
833 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
835 unsigned int truesize = ring_uses_build_skb(rx_ring) ?
836 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
837 SKB_DATA_ALIGN(size);
839 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
840 rx_buffer->page_offset, size, truesize);
841 #if (PAGE_SIZE < 8192)
842 rx_buffer->page_offset ^= truesize;
844 rx_buffer->page_offset += truesize;
849 struct sk_buff *ixgbevf_construct_skb(struct ixgbevf_ring *rx_ring,
850 struct ixgbevf_rx_buffer *rx_buffer,
851 struct xdp_buff *xdp,
852 union ixgbe_adv_rx_desc *rx_desc)
854 unsigned int size = xdp->data_end - xdp->data;
855 #if (PAGE_SIZE < 8192)
856 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
858 unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
859 xdp->data_hard_start);
861 unsigned int headlen;
864 /* prefetch first cache line of first page */
865 net_prefetch(xdp->data);
867 /* Note, we get here by enabling legacy-rx via:
869 * ethtool --set-priv-flags <dev> legacy-rx on
871 * In this mode, we currently get 0 extra XDP headroom as
872 * opposed to having legacy-rx off, where we process XDP
873 * packets going to stack via ixgbevf_build_skb().
875 * For ixgbevf_construct_skb() mode it means that the
876 * xdp->data_meta will always point to xdp->data, since
877 * the helper cannot expand the head. Should this ever
878 * changed in future for legacy-rx mode on, then lets also
879 * add xdp->data_meta handling here.
882 /* allocate a skb to store the frags */
883 skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBEVF_RX_HDR_SIZE);
887 /* Determine available headroom for copy */
889 if (headlen > IXGBEVF_RX_HDR_SIZE)
890 headlen = eth_get_headlen(skb->dev, xdp->data,
891 IXGBEVF_RX_HDR_SIZE);
893 /* align pull length to size of long to optimize memcpy performance */
894 memcpy(__skb_put(skb, headlen), xdp->data,
895 ALIGN(headlen, sizeof(long)));
897 /* update all of the pointers */
900 skb_add_rx_frag(skb, 0, rx_buffer->page,
901 (xdp->data + headlen) -
902 page_address(rx_buffer->page),
904 #if (PAGE_SIZE < 8192)
905 rx_buffer->page_offset ^= truesize;
907 rx_buffer->page_offset += truesize;
910 rx_buffer->pagecnt_bias++;
916 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
919 struct ixgbe_hw *hw = &adapter->hw;
921 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
924 static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,
925 struct ixgbevf_rx_buffer *rx_buffer,
926 struct xdp_buff *xdp,
927 union ixgbe_adv_rx_desc *rx_desc)
929 unsigned int metasize = xdp->data - xdp->data_meta;
930 #if (PAGE_SIZE < 8192)
931 unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
933 unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
934 SKB_DATA_ALIGN(xdp->data_end -
935 xdp->data_hard_start);
939 /* Prefetch first cache line of first page. If xdp->data_meta
940 * is unused, this points to xdp->data, otherwise, we likely
941 * have a consumer accessing first few bytes of meta data,
942 * and then actual data.
944 net_prefetch(xdp->data_meta);
946 /* build an skb around the page buffer */
947 skb = build_skb(xdp->data_hard_start, truesize);
951 /* update pointers within the skb to store the data */
952 skb_reserve(skb, xdp->data - xdp->data_hard_start);
953 __skb_put(skb, xdp->data_end - xdp->data);
955 skb_metadata_set(skb, metasize);
957 /* update buffer offset */
958 #if (PAGE_SIZE < 8192)
959 rx_buffer->page_offset ^= truesize;
961 rx_buffer->page_offset += truesize;
967 #define IXGBEVF_XDP_PASS 0
968 #define IXGBEVF_XDP_CONSUMED 1
969 #define IXGBEVF_XDP_TX 2
971 static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring *ring,
972 struct xdp_buff *xdp)
974 struct ixgbevf_tx_buffer *tx_buffer;
975 union ixgbe_adv_tx_desc *tx_desc;
980 len = xdp->data_end - xdp->data;
982 if (unlikely(!ixgbevf_desc_unused(ring)))
983 return IXGBEVF_XDP_CONSUMED;
985 dma = dma_map_single(ring->dev, xdp->data, len, DMA_TO_DEVICE);
986 if (dma_mapping_error(ring->dev, dma))
987 return IXGBEVF_XDP_CONSUMED;
989 /* record the location of the first descriptor for this packet */
990 i = ring->next_to_use;
991 tx_buffer = &ring->tx_buffer_info[i];
993 dma_unmap_len_set(tx_buffer, len, len);
994 dma_unmap_addr_set(tx_buffer, dma, dma);
995 tx_buffer->data = xdp->data;
996 tx_buffer->bytecount = len;
997 tx_buffer->gso_segs = 1;
998 tx_buffer->protocol = 0;
1000 /* Populate minimal context descriptor that will provide for the
1001 * fact that we are expected to process Ethernet frames.
1003 if (!test_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state)) {
1004 struct ixgbe_adv_tx_context_desc *context_desc;
1006 set_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1008 context_desc = IXGBEVF_TX_CTXTDESC(ring, 0);
1009 context_desc->vlan_macip_lens =
1010 cpu_to_le32(ETH_HLEN << IXGBE_ADVTXD_MACLEN_SHIFT);
1011 context_desc->fceof_saidx = 0;
1012 context_desc->type_tucmd_mlhl =
1013 cpu_to_le32(IXGBE_TXD_CMD_DEXT |
1014 IXGBE_ADVTXD_DTYP_CTXT);
1015 context_desc->mss_l4len_idx = 0;
1020 /* put descriptor type bits */
1021 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
1022 IXGBE_ADVTXD_DCMD_DEXT |
1023 IXGBE_ADVTXD_DCMD_IFCS;
1024 cmd_type |= len | IXGBE_TXD_CMD;
1026 tx_desc = IXGBEVF_TX_DESC(ring, i);
1027 tx_desc->read.buffer_addr = cpu_to_le64(dma);
1029 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
1030 tx_desc->read.olinfo_status =
1031 cpu_to_le32((len << IXGBE_ADVTXD_PAYLEN_SHIFT) |
1034 /* Avoid any potential race with cleanup */
1037 /* set next_to_watch value indicating a packet is present */
1039 if (i == ring->count)
1042 tx_buffer->next_to_watch = tx_desc;
1043 ring->next_to_use = i;
1045 return IXGBEVF_XDP_TX;
1048 static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
1049 struct ixgbevf_ring *rx_ring,
1050 struct xdp_buff *xdp)
1052 int result = IXGBEVF_XDP_PASS;
1053 struct ixgbevf_ring *xdp_ring;
1054 struct bpf_prog *xdp_prog;
1058 xdp_prog = READ_ONCE(rx_ring->xdp_prog);
1063 act = bpf_prog_run_xdp(xdp_prog, xdp);
1068 xdp_ring = adapter->xdp_ring[rx_ring->queue_index];
1069 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);
1072 bpf_warn_invalid_xdp_action(act);
1075 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
1076 fallthrough; /* handle aborts by dropping packet */
1078 result = IXGBEVF_XDP_CONSUMED;
1083 return ERR_PTR(-result);
1086 static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring,
1089 unsigned int truesize;
1091 #if (PAGE_SIZE < 8192)
1092 truesize = ixgbevf_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */
1094 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);
1102 static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
1103 struct ixgbevf_rx_buffer *rx_buffer,
1106 unsigned int truesize = ixgbevf_rx_frame_truesize(rx_ring, size);
1108 #if (PAGE_SIZE < 8192)
1109 rx_buffer->page_offset ^= truesize;
1111 rx_buffer->page_offset += truesize;
1115 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
1116 struct ixgbevf_ring *rx_ring,
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;
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);
1130 xdp_init_buff(&xdp, frame_sz, &rx_ring->xdp_rxq);
1132 while (likely(total_rx_packets < budget)) {
1133 struct ixgbevf_rx_buffer *rx_buffer;
1134 union ixgbe_adv_rx_desc *rx_desc;
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);
1143 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
1144 size = le16_to_cpu(rx_desc->wb.upper.length);
1148 /* This memory barrier is needed to keep us from reading
1149 * any other fields out of the rx_desc until we know the
1150 * RXD_STAT_DD bit is set
1154 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);
1156 /* retrieve a buffer from the ring */
1158 unsigned int offset = ixgbevf_rx_offset(rx_ring);
1159 unsigned char *hard_start;
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);
1168 skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
1172 if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
1174 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
1177 rx_buffer->pagecnt_bias++;
1180 total_rx_bytes += size;
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,
1187 skb = ixgbevf_construct_skb(rx_ring, rx_buffer,
1191 /* exit if we failed to retrieve a buffer */
1193 rx_ring->rx_stats.alloc_rx_buff_failed++;
1194 rx_buffer->pagecnt_bias++;
1198 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);
1201 /* fetch next buffer in frame if non-eop */
1202 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
1205 /* verify the packet layout is correct */
1206 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
1211 /* probably a little skewed due to removing CRC */
1212 total_rx_bytes += skb->len;
1214 /* Workaround hardware that can't do proper VEPA multicast
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);
1225 /* populate checksum, VLAN, and protocol */
1226 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
1228 ixgbevf_rx_skb(q_vector, skb);
1230 /* reset skb pointer */
1233 /* update budget accounting */
1237 /* place incomplete frames back on ring for completion */
1241 struct ixgbevf_ring *xdp_ring =
1242 adapter->xdp_ring[rx_ring->queue_index];
1244 /* Force memory writes to complete before letting h/w
1245 * know there are new descriptors to fetch.
1248 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);
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;
1258 return total_rx_packets;
1262 * ixgbevf_poll - NAPI polling calback
1263 * @napi: napi struct with our devices info in it
1264 * @budget: amount of work driver is allowed to do this pass, in packets
1266 * This function will clean more than one or more rings associated with a
1269 static int ixgbevf_poll(struct napi_struct *napi, int budget)
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;
1278 ixgbevf_for_each_ring(ring, q_vector->tx) {
1279 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
1280 clean_complete = false;
1286 /* attempt to distribute budget to each queue fairly, but don't allow
1287 * the budget to go below 1 because we'll exit polling
1289 if (q_vector->rx.count > 1)
1290 per_ring_budget = max(budget/q_vector->rx.count, 1);
1292 per_ring_budget = budget;
1294 ixgbevf_for_each_ring(ring, q_vector->rx) {
1295 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1297 work_done += cleaned;
1298 if (cleaned >= per_ring_budget)
1299 clean_complete = false;
1302 /* If all work not completed, return budget and keep polling */
1303 if (!clean_complete)
1306 /* Exit the polling mode, but don't re-enable interrupts if stack might
1307 * poll us due to busy-polling
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));
1318 return min(work_done, budget - 1);
1322 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1323 * @q_vector: structure containing interrupt and ring information
1325 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
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;
1332 /* set the WDIS bit to not clear the timer bits and cause an
1333 * immediate assertion of the interrupt
1335 itr_reg |= IXGBE_EITR_CNT_WDIS;
1337 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1341 * ixgbevf_configure_msix - Configure MSI-X hardware
1342 * @adapter: board private structure
1344 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1347 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1349 struct ixgbevf_q_vector *q_vector;
1350 int q_vectors, v_idx;
1352 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1353 adapter->eims_enable_mask = 0;
1355 /* Populate the IVAR table and set the ITR values to the
1356 * corresponding register.
1358 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1359 struct ixgbevf_ring *ring;
1361 q_vector = adapter->q_vector[v_idx];
1363 ixgbevf_for_each_ring(ring, q_vector->rx)
1364 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1366 ixgbevf_for_each_ring(ring, q_vector->tx)
1367 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
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;
1374 q_vector->itr = adapter->tx_itr_setting;
1376 /* Rx or Rx/Tx vector */
1377 if (adapter->rx_itr_setting == 1)
1378 q_vector->itr = IXGBE_20K_ITR;
1380 q_vector->itr = adapter->rx_itr_setting;
1383 /* add q_vector eims value to global eims_enable_mask */
1384 adapter->eims_enable_mask |= BIT(v_idx);
1386 ixgbevf_write_eitr(q_vector);
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;
1395 enum latency_range {
1399 latency_invalid = 255
1403 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1404 * @q_vector: structure containing interrupt and ring information
1405 * @ring_container: structure containing ring performance data
1407 * Stores a new ITR value based on packets and byte
1408 * counts during the last interrupt. The advantage of per interrupt
1409 * computation is faster updates and more accurate ITR for the current
1410 * traffic pattern. Constants in this function were computed
1411 * based on theoretical maximum wire speed and thresholds were set based
1412 * on testing data as well as attempting to minimize response time
1413 * while increasing bulk throughput.
1415 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1416 struct ixgbevf_ring_container *ring_container)
1418 int bytes = ring_container->total_bytes;
1419 int packets = ring_container->total_packets;
1422 u8 itr_setting = ring_container->itr;
1427 /* simple throttle rate management
1428 * 0-20MB/s lowest (100000 ints/s)
1429 * 20-100MB/s low (20000 ints/s)
1430 * 100-1249MB/s bulk (12000 ints/s)
1432 /* what was last interrupt timeslice? */
1433 timepassed_us = q_vector->itr >> 2;
1434 if (timepassed_us == 0)
1437 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1439 switch (itr_setting) {
1440 case lowest_latency:
1441 if (bytes_perint > 10)
1442 itr_setting = low_latency;
1445 if (bytes_perint > 20)
1446 itr_setting = bulk_latency;
1447 else if (bytes_perint <= 10)
1448 itr_setting = lowest_latency;
1451 if (bytes_perint <= 20)
1452 itr_setting = low_latency;
1456 /* clear work counters since we have the values we need */
1457 ring_container->total_bytes = 0;
1458 ring_container->total_packets = 0;
1460 /* write updated itr to ring container */
1461 ring_container->itr = itr_setting;
1464 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1466 u32 new_itr = q_vector->itr;
1469 ixgbevf_update_itr(q_vector, &q_vector->tx);
1470 ixgbevf_update_itr(q_vector, &q_vector->rx);
1472 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
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;
1480 new_itr = IXGBE_20K_ITR;
1483 new_itr = IXGBE_12K_ITR;
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);
1494 /* save the algorithm value here */
1495 q_vector->itr = new_itr;
1497 ixgbevf_write_eitr(q_vector);
1501 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1503 struct ixgbevf_adapter *adapter = data;
1504 struct ixgbe_hw *hw = &adapter->hw;
1506 hw->mac.get_link_status = 1;
1508 ixgbevf_service_event_schedule(adapter);
1510 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1516 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1518 * @data: pointer to our q_vector struct for this interrupt vector
1520 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1522 struct ixgbevf_q_vector *q_vector = data;
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);
1532 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1533 * @adapter: board private structure
1535 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1536 * interrupts from the kernel.
1538 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
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;
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];
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++);
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++);
1560 /* skip this unused q_vector */
1563 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1564 q_vector->name, q_vector);
1566 hw_dbg(&adapter->hw,
1567 "request_irq failed for MSIX interrupt Error: %d\n",
1569 goto free_queue_irqs;
1573 err = request_irq(adapter->msix_entries[vector].vector,
1574 &ixgbevf_msix_other, 0, netdev->name, adapter);
1576 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1578 goto free_queue_irqs;
1586 free_irq(adapter->msix_entries[vector].vector,
1587 adapter->q_vector[vector]);
1589 /* This failure is non-recoverable - it indicates the system is
1590 * out of MSIX vector resources and the VF driver cannot run
1591 * without them. Set the number of msix vectors to zero
1592 * indicating that not enough can be allocated. The error
1593 * will be returned to the user indicating device open failed.
1594 * Any further attempts to force the driver to open will also
1595 * fail. The only way to recover is to unload the driver and
1596 * reload it again. If the system has recovered some MSIX
1597 * vectors then it may succeed.
1599 adapter->num_msix_vectors = 0;
1604 * ixgbevf_request_irq - initialize interrupts
1605 * @adapter: board private structure
1607 * Attempts to configure interrupts using the best available
1608 * capabilities of the hardware and kernel.
1610 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1612 int err = ixgbevf_request_msix_irqs(adapter);
1615 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1620 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1624 if (!adapter->msix_entries)
1627 q_vectors = adapter->num_msix_vectors;
1630 free_irq(adapter->msix_entries[i].vector, adapter);
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)
1639 free_irq(adapter->msix_entries[i].vector,
1640 adapter->q_vector[i]);
1645 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1646 * @adapter: board private structure
1648 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1650 struct ixgbe_hw *hw = &adapter->hw;
1653 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1654 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1655 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1657 IXGBE_WRITE_FLUSH(hw);
1659 for (i = 0; i < adapter->num_msix_vectors; i++)
1660 synchronize_irq(adapter->msix_entries[i].vector);
1664 * ixgbevf_irq_enable - Enable default interrupt generation settings
1665 * @adapter: board private structure
1667 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1669 struct ixgbe_hw *hw = &adapter->hw;
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);
1677 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1678 * @adapter: board private structure
1679 * @ring: structure containing ring specific data
1681 * Configure the Tx descriptor ring after a reset.
1683 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1684 struct ixgbevf_ring *ring)
1686 struct ixgbe_hw *hw = &adapter->hw;
1687 u64 tdba = ring->dma;
1689 u32 txdctl = IXGBE_TXDCTL_ENABLE;
1690 u8 reg_idx = ring->reg_idx;
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);
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));
1701 /* disable head writeback */
1702 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1703 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
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));
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);
1715 /* reset ntu and ntc to place SW in sync with hardwdare */
1716 ring->next_to_clean = 0;
1717 ring->next_to_use = 0;
1719 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1720 * to or less than the number of on chip descriptors, which is
1723 txdctl |= (8 << 16); /* WTHRESH = 8 */
1725 /* Setting PTHRESH to 32 both improves performance */
1726 txdctl |= (1u << 8) | /* HTHRESH = 1 */
1727 32; /* PTHRESH = 32 */
1729 /* reinitialize tx_buffer_info */
1730 memset(ring->tx_buffer_info, 0,
1731 sizeof(struct ixgbevf_tx_buffer) * ring->count);
1733 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1734 clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1736 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1738 /* poll to verify queue is enabled */
1740 usleep_range(1000, 2000);
1741 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1742 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1744 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
1748 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1749 * @adapter: board private structure
1751 * Configure the Tx unit of the MAC after a reset.
1753 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
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]);
1764 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1766 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,
1767 struct ixgbevf_ring *ring, int index)
1769 struct ixgbe_hw *hw = &adapter->hw;
1772 srrctl = IXGBE_SRRCTL_DROP_EN;
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;
1778 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1779 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1781 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1784 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1786 struct ixgbe_hw *hw = &adapter->hw;
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;
1793 if (adapter->num_rx_queues > 1)
1796 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1799 #define IXGBEVF_MAX_RX_DESC_POLL 10
1800 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1801 struct ixgbevf_ring *ring)
1803 struct ixgbe_hw *hw = &adapter->hw;
1804 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1806 u8 reg_idx = ring->reg_idx;
1808 if (IXGBE_REMOVED(hw->hw_addr))
1810 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1811 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1813 /* write value back with RXDCTL.ENABLE bit cleared */
1814 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1816 /* the hardware may take up to 100us to really disable the Rx queue */
1819 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1820 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1823 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1827 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1828 struct ixgbevf_ring *ring)
1830 struct ixgbe_hw *hw = &adapter->hw;
1831 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1833 u8 reg_idx = ring->reg_idx;
1835 if (IXGBE_REMOVED(hw->hw_addr))
1838 usleep_range(1000, 2000);
1839 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1840 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1843 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1848 * ixgbevf_init_rss_key - Initialize adapter RSS key
1849 * @adapter: device handle
1851 * Allocates and initializes the RSS key if it is not allocated.
1853 static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)
1857 if (!adapter->rss_key) {
1858 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);
1859 if (unlikely(!rss_key))
1862 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);
1863 adapter->rss_key = rss_key;
1869 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1871 struct ixgbe_hw *hw = &adapter->hw;
1872 u32 vfmrqc = 0, vfreta = 0;
1873 u16 rss_i = adapter->num_rx_queues;
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));
1880 for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1884 adapter->rss_indir_tbl[i] = j;
1886 vfreta |= j << (i & 0x3) * 8;
1888 IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
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;
1899 vfmrqc |= IXGBE_VFMRQC_RSSEN;
1901 IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1904 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1905 struct ixgbevf_ring *ring)
1907 struct ixgbe_hw *hw = &adapter->hw;
1908 union ixgbe_adv_rx_desc *rx_desc;
1909 u64 rdba = ring->dma;
1911 u8 reg_idx = ring->reg_idx;
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);
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));
1922 #ifndef CONFIG_SPARC
1923 /* enable relaxed ordering */
1924 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1925 IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1927 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1928 IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1929 IXGBE_DCA_RXCTRL_DATA_WRO_EN);
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);
1937 /* initialize rx_buffer_info */
1938 memset(ring->rx_buffer_info, 0,
1939 sizeof(struct ixgbevf_rx_buffer) * ring->count);
1941 /* initialize Rx descriptor 0 */
1942 rx_desc = IXGBEVF_RX_DESC(ring, 0);
1943 rx_desc->wb.upper.length = 0;
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;
1950 ixgbevf_configure_srrctl(adapter, ring, reg_idx);
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);
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;
1966 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1967 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1969 ixgbevf_rx_desc_queue_enable(adapter, ring);
1970 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1973 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
1974 struct ixgbevf_ring *rx_ring)
1976 struct net_device *netdev = adapter->netdev;
1977 unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1979 /* set build_skb and buffer size flags */
1980 clear_ring_build_skb_enabled(rx_ring);
1981 clear_ring_uses_large_buffer(rx_ring);
1983 if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
1986 set_ring_build_skb_enabled(rx_ring);
1988 if (PAGE_SIZE < 8192) {
1989 if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
1992 set_ring_uses_large_buffer(rx_ring);
1997 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1998 * @adapter: board private structure
2000 * Configure the Rx unit of the MAC after a reset.
2002 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
2004 struct ixgbe_hw *hw = &adapter->hw;
2005 struct net_device *netdev = adapter->netdev;
2008 ixgbevf_setup_psrtype(adapter);
2009 if (hw->mac.type >= ixgbe_mac_X550_vf)
2010 ixgbevf_setup_vfmrqc(adapter);
2012 spin_lock_bh(&adapter->mbx_lock);
2013 /* notify the PF of our intent to use this size of frame */
2014 ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
2015 spin_unlock_bh(&adapter->mbx_lock);
2017 dev_err(&adapter->pdev->dev,
2018 "Failed to set MTU at %d\n", netdev->mtu);
2020 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2021 * the Base and Length of the Rx Descriptor Ring
2023 for (i = 0; i < adapter->num_rx_queues; i++) {
2024 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
2026 ixgbevf_set_rx_buffer_len(adapter, rx_ring);
2027 ixgbevf_configure_rx_ring(adapter, rx_ring);
2031 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
2032 __be16 proto, u16 vid)
2034 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2035 struct ixgbe_hw *hw = &adapter->hw;
2038 spin_lock_bh(&adapter->mbx_lock);
2040 /* add VID to filter table */
2041 err = hw->mac.ops.set_vfta(hw, vid, 0, true);
2043 spin_unlock_bh(&adapter->mbx_lock);
2045 /* translate error return types so error makes sense */
2046 if (err == IXGBE_ERR_MBX)
2049 if (err == IXGBE_ERR_INVALID_ARGUMENT)
2052 set_bit(vid, adapter->active_vlans);
2057 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
2058 __be16 proto, u16 vid)
2060 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2061 struct ixgbe_hw *hw = &adapter->hw;
2064 spin_lock_bh(&adapter->mbx_lock);
2066 /* remove VID from filter table */
2067 err = hw->mac.ops.set_vfta(hw, vid, 0, false);
2069 spin_unlock_bh(&adapter->mbx_lock);
2071 clear_bit(vid, adapter->active_vlans);
2076 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
2080 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2081 ixgbevf_vlan_rx_add_vid(adapter->netdev,
2082 htons(ETH_P_8021Q), vid);
2085 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
2087 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2088 struct ixgbe_hw *hw = &adapter->hw;
2091 if (!netdev_uc_empty(netdev)) {
2092 struct netdev_hw_addr *ha;
2094 netdev_for_each_uc_addr(ha, netdev) {
2095 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
2099 /* If the list is empty then send message to PF driver to
2100 * clear all MAC VLANs on this VF.
2102 hw->mac.ops.set_uc_addr(hw, 0, NULL);
2109 * ixgbevf_set_rx_mode - Multicast and unicast set
2110 * @netdev: network interface device structure
2112 * The set_rx_method entry point is called whenever the multicast address
2113 * list, unicast address list or the network interface flags are updated.
2114 * This routine is responsible for configuring the hardware for proper
2115 * multicast mode and configuring requested unicast filters.
2117 static void ixgbevf_set_rx_mode(struct net_device *netdev)
2119 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2120 struct ixgbe_hw *hw = &adapter->hw;
2121 unsigned int flags = netdev->flags;
2124 /* request the most inclusive mode we need */
2125 if (flags & IFF_PROMISC)
2126 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;
2127 else if (flags & IFF_ALLMULTI)
2128 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;
2129 else if (flags & (IFF_BROADCAST | IFF_MULTICAST))
2130 xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
2132 xcast_mode = IXGBEVF_XCAST_MODE_NONE;
2134 spin_lock_bh(&adapter->mbx_lock);
2136 hw->mac.ops.update_xcast_mode(hw, xcast_mode);
2138 /* reprogram multicast list */
2139 hw->mac.ops.update_mc_addr_list(hw, netdev);
2141 ixgbevf_write_uc_addr_list(netdev);
2143 spin_unlock_bh(&adapter->mbx_lock);
2146 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
2149 struct ixgbevf_q_vector *q_vector;
2150 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2152 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2153 q_vector = adapter->q_vector[q_idx];
2154 napi_enable(&q_vector->napi);
2158 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
2161 struct ixgbevf_q_vector *q_vector;
2162 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2164 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2165 q_vector = adapter->q_vector[q_idx];
2166 napi_disable(&q_vector->napi);
2170 static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
2172 struct ixgbe_hw *hw = &adapter->hw;
2173 unsigned int def_q = 0;
2174 unsigned int num_tcs = 0;
2175 unsigned int num_rx_queues = adapter->num_rx_queues;
2176 unsigned int num_tx_queues = adapter->num_tx_queues;
2179 spin_lock_bh(&adapter->mbx_lock);
2181 /* fetch queue configuration from the PF */
2182 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2184 spin_unlock_bh(&adapter->mbx_lock);
2190 /* we need only one Tx queue */
2193 /* update default Tx ring register index */
2194 adapter->tx_ring[0]->reg_idx = def_q;
2196 /* we need as many queues as traffic classes */
2197 num_rx_queues = num_tcs;
2200 /* if we have a bad config abort request queue reset */
2201 if ((adapter->num_rx_queues != num_rx_queues) ||
2202 (adapter->num_tx_queues != num_tx_queues)) {
2203 /* force mailbox timeout to prevent further messages */
2204 hw->mbx.timeout = 0;
2206 /* wait for watchdog to come around and bail us out */
2207 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
2213 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
2215 ixgbevf_configure_dcb(adapter);
2217 ixgbevf_set_rx_mode(adapter->netdev);
2219 ixgbevf_restore_vlan(adapter);
2220 ixgbevf_ipsec_restore(adapter);
2222 ixgbevf_configure_tx(adapter);
2223 ixgbevf_configure_rx(adapter);
2226 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2228 /* Only save pre-reset stats if there are some */
2229 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2230 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2231 adapter->stats.base_vfgprc;
2232 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2233 adapter->stats.base_vfgptc;
2234 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2235 adapter->stats.base_vfgorc;
2236 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2237 adapter->stats.base_vfgotc;
2238 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2239 adapter->stats.base_vfmprc;
2243 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2245 struct ixgbe_hw *hw = &adapter->hw;
2247 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2248 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2249 adapter->stats.last_vfgorc |=
2250 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2251 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2252 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2253 adapter->stats.last_vfgotc |=
2254 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2255 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2257 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2258 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2259 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2260 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2261 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2264 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2266 struct ixgbe_hw *hw = &adapter->hw;
2267 static const int api[] = {
2273 ixgbe_mbox_api_unknown
2277 spin_lock_bh(&adapter->mbx_lock);
2279 while (api[idx] != ixgbe_mbox_api_unknown) {
2280 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
2286 spin_unlock_bh(&adapter->mbx_lock);
2289 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2291 struct net_device *netdev = adapter->netdev;
2292 struct ixgbe_hw *hw = &adapter->hw;
2294 ixgbevf_configure_msix(adapter);
2296 spin_lock_bh(&adapter->mbx_lock);
2298 if (is_valid_ether_addr(hw->mac.addr))
2299 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2301 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2303 spin_unlock_bh(&adapter->mbx_lock);
2305 smp_mb__before_atomic();
2306 clear_bit(__IXGBEVF_DOWN, &adapter->state);
2307 ixgbevf_napi_enable_all(adapter);
2309 /* clear any pending interrupts, may auto mask */
2310 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2311 ixgbevf_irq_enable(adapter);
2313 /* enable transmits */
2314 netif_tx_start_all_queues(netdev);
2316 ixgbevf_save_reset_stats(adapter);
2317 ixgbevf_init_last_counter_stats(adapter);
2319 hw->mac.get_link_status = 1;
2320 mod_timer(&adapter->service_timer, jiffies);
2323 void ixgbevf_up(struct ixgbevf_adapter *adapter)
2325 ixgbevf_configure(adapter);
2327 ixgbevf_up_complete(adapter);
2331 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2332 * @rx_ring: ring to free buffers from
2334 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2336 u16 i = rx_ring->next_to_clean;
2338 /* Free Rx ring sk_buff */
2340 dev_kfree_skb(rx_ring->skb);
2341 rx_ring->skb = NULL;
2344 /* Free all the Rx ring pages */
2345 while (i != rx_ring->next_to_alloc) {
2346 struct ixgbevf_rx_buffer *rx_buffer;
2348 rx_buffer = &rx_ring->rx_buffer_info[i];
2350 /* Invalidate cache lines that may have been written to by
2351 * device so that we avoid corrupting memory.
2353 dma_sync_single_range_for_cpu(rx_ring->dev,
2355 rx_buffer->page_offset,
2356 ixgbevf_rx_bufsz(rx_ring),
2359 /* free resources associated with mapping */
2360 dma_unmap_page_attrs(rx_ring->dev,
2362 ixgbevf_rx_pg_size(rx_ring),
2364 IXGBEVF_RX_DMA_ATTR);
2366 __page_frag_cache_drain(rx_buffer->page,
2367 rx_buffer->pagecnt_bias);
2370 if (i == rx_ring->count)
2374 rx_ring->next_to_alloc = 0;
2375 rx_ring->next_to_clean = 0;
2376 rx_ring->next_to_use = 0;
2380 * ixgbevf_clean_tx_ring - Free Tx Buffers
2381 * @tx_ring: ring to be cleaned
2383 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2385 u16 i = tx_ring->next_to_clean;
2386 struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
2388 while (i != tx_ring->next_to_use) {
2389 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
2391 /* Free all the Tx ring sk_buffs */
2392 if (ring_is_xdp(tx_ring))
2393 page_frag_free(tx_buffer->data);
2395 dev_kfree_skb_any(tx_buffer->skb);
2397 /* unmap skb header data */
2398 dma_unmap_single(tx_ring->dev,
2399 dma_unmap_addr(tx_buffer, dma),
2400 dma_unmap_len(tx_buffer, len),
2403 /* check for eop_desc to determine the end of the packet */
2404 eop_desc = tx_buffer->next_to_watch;
2405 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2407 /* unmap remaining buffers */
2408 while (tx_desc != eop_desc) {
2412 if (unlikely(i == tx_ring->count)) {
2414 tx_buffer = tx_ring->tx_buffer_info;
2415 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
2418 /* unmap any remaining paged data */
2419 if (dma_unmap_len(tx_buffer, len))
2420 dma_unmap_page(tx_ring->dev,
2421 dma_unmap_addr(tx_buffer, dma),
2422 dma_unmap_len(tx_buffer, len),
2426 /* move us one more past the eop_desc for start of next pkt */
2429 if (unlikely(i == tx_ring->count)) {
2431 tx_buffer = tx_ring->tx_buffer_info;
2435 /* reset next_to_use and next_to_clean */
2436 tx_ring->next_to_use = 0;
2437 tx_ring->next_to_clean = 0;
2442 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2443 * @adapter: board private structure
2445 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2449 for (i = 0; i < adapter->num_rx_queues; i++)
2450 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2454 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2455 * @adapter: board private structure
2457 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2461 for (i = 0; i < adapter->num_tx_queues; i++)
2462 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2463 for (i = 0; i < adapter->num_xdp_queues; i++)
2464 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);
2467 void ixgbevf_down(struct ixgbevf_adapter *adapter)
2469 struct net_device *netdev = adapter->netdev;
2470 struct ixgbe_hw *hw = &adapter->hw;
2473 /* signal that we are down to the interrupt handler */
2474 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2475 return; /* do nothing if already down */
2477 /* disable all enabled Rx queues */
2478 for (i = 0; i < adapter->num_rx_queues; i++)
2479 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2481 usleep_range(10000, 20000);
2483 netif_tx_stop_all_queues(netdev);
2485 /* call carrier off first to avoid false dev_watchdog timeouts */
2486 netif_carrier_off(netdev);
2487 netif_tx_disable(netdev);
2489 ixgbevf_irq_disable(adapter);
2491 ixgbevf_napi_disable_all(adapter);
2493 del_timer_sync(&adapter->service_timer);
2495 /* disable transmits in the hardware now that interrupts are off */
2496 for (i = 0; i < adapter->num_tx_queues; i++) {
2497 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2499 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2500 IXGBE_TXDCTL_SWFLSH);
2503 for (i = 0; i < adapter->num_xdp_queues; i++) {
2504 u8 reg_idx = adapter->xdp_ring[i]->reg_idx;
2506 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2507 IXGBE_TXDCTL_SWFLSH);
2510 if (!pci_channel_offline(adapter->pdev))
2511 ixgbevf_reset(adapter);
2513 ixgbevf_clean_all_tx_rings(adapter);
2514 ixgbevf_clean_all_rx_rings(adapter);
2517 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2519 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2522 ixgbevf_down(adapter);
2523 pci_set_master(adapter->pdev);
2524 ixgbevf_up(adapter);
2526 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2529 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2531 struct ixgbe_hw *hw = &adapter->hw;
2532 struct net_device *netdev = adapter->netdev;
2534 if (hw->mac.ops.reset_hw(hw)) {
2535 hw_dbg(hw, "PF still resetting\n");
2537 hw->mac.ops.init_hw(hw);
2538 ixgbevf_negotiate_api(adapter);
2541 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2542 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2543 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2546 adapter->last_reset = jiffies;
2549 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2552 int vector_threshold;
2554 /* We'll want at least 2 (vector_threshold):
2555 * 1) TxQ[0] + RxQ[0] handler
2556 * 2) Other (Link Status Change, etc.)
2558 vector_threshold = MIN_MSIX_COUNT;
2560 /* The more we get, the more we will assign to Tx/Rx Cleanup
2561 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2562 * Right now, we simply care about how many we'll get; we'll
2563 * set them up later while requesting irq's.
2565 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2566 vector_threshold, vectors);
2569 dev_err(&adapter->pdev->dev,
2570 "Unable to allocate MSI-X interrupts\n");
2571 kfree(adapter->msix_entries);
2572 adapter->msix_entries = NULL;
2576 /* Adjust for only the vectors we'll use, which is minimum
2577 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2578 * vectors we were allocated.
2580 adapter->num_msix_vectors = vectors;
2586 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2587 * @adapter: board private structure to initialize
2589 * This is the top level queue allocation routine. The order here is very
2590 * important, starting with the "most" number of features turned on at once,
2591 * and ending with the smallest set of features. This way large combinations
2592 * can be allocated if they're turned on, and smaller combinations are the
2593 * fall through conditions.
2596 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2598 struct ixgbe_hw *hw = &adapter->hw;
2599 unsigned int def_q = 0;
2600 unsigned int num_tcs = 0;
2603 /* Start with base case */
2604 adapter->num_rx_queues = 1;
2605 adapter->num_tx_queues = 1;
2606 adapter->num_xdp_queues = 0;
2608 spin_lock_bh(&adapter->mbx_lock);
2610 /* fetch queue configuration from the PF */
2611 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2613 spin_unlock_bh(&adapter->mbx_lock);
2618 /* we need as many queues as traffic classes */
2620 adapter->num_rx_queues = num_tcs;
2622 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2624 switch (hw->api_version) {
2625 case ixgbe_mbox_api_11:
2626 case ixgbe_mbox_api_12:
2627 case ixgbe_mbox_api_13:
2628 case ixgbe_mbox_api_14:
2629 if (adapter->xdp_prog &&
2630 hw->mac.max_tx_queues == rss)
2631 rss = rss > 3 ? 2 : 1;
2633 adapter->num_rx_queues = rss;
2634 adapter->num_tx_queues = rss;
2635 adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;
2643 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2644 * @adapter: board private structure to initialize
2646 * Attempt to configure the interrupts using the best available
2647 * capabilities of the hardware and the kernel.
2649 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2651 int vector, v_budget;
2653 /* It's easy to be greedy for MSI-X vectors, but it really
2654 * doesn't do us much good if we have a lot more vectors
2655 * than CPU's. So let's be conservative and only ask for
2656 * (roughly) the same number of vectors as there are CPU's.
2657 * The default is to use pairs of vectors.
2659 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2660 v_budget = min_t(int, v_budget, num_online_cpus());
2661 v_budget += NON_Q_VECTORS;
2663 adapter->msix_entries = kcalloc(v_budget,
2664 sizeof(struct msix_entry), GFP_KERNEL);
2665 if (!adapter->msix_entries)
2668 for (vector = 0; vector < v_budget; vector++)
2669 adapter->msix_entries[vector].entry = vector;
2671 /* A failure in MSI-X entry allocation isn't fatal, but the VF driver
2672 * does not support any other modes, so we will simply fail here. Note
2673 * that we clean up the msix_entries pointer else-where.
2675 return ixgbevf_acquire_msix_vectors(adapter, v_budget);
2678 static void ixgbevf_add_ring(struct ixgbevf_ring *ring,
2679 struct ixgbevf_ring_container *head)
2681 ring->next = head->ring;
2687 * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector
2688 * @adapter: board private structure to initialize
2689 * @v_idx: index of vector in adapter struct
2690 * @txr_count: number of Tx rings for q vector
2691 * @txr_idx: index of first Tx ring to assign
2692 * @xdp_count: total number of XDP rings to allocate
2693 * @xdp_idx: index of first XDP ring to allocate
2694 * @rxr_count: number of Rx rings for q vector
2695 * @rxr_idx: index of first Rx ring to assign
2697 * We allocate one q_vector. If allocation fails we return -ENOMEM.
2699 static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,
2700 int txr_count, int txr_idx,
2701 int xdp_count, int xdp_idx,
2702 int rxr_count, int rxr_idx)
2704 struct ixgbevf_q_vector *q_vector;
2705 int reg_idx = txr_idx + xdp_idx;
2706 struct ixgbevf_ring *ring;
2707 int ring_count, size;
2709 ring_count = txr_count + xdp_count + rxr_count;
2710 size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);
2712 /* allocate q_vector and rings */
2713 q_vector = kzalloc(size, GFP_KERNEL);
2717 /* initialize NAPI */
2718 netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll, 64);
2720 /* tie q_vector and adapter together */
2721 adapter->q_vector[v_idx] = q_vector;
2722 q_vector->adapter = adapter;
2723 q_vector->v_idx = v_idx;
2725 /* initialize pointer to rings */
2726 ring = q_vector->ring;
2729 /* assign generic ring traits */
2730 ring->dev = &adapter->pdev->dev;
2731 ring->netdev = adapter->netdev;
2733 /* configure backlink on ring */
2734 ring->q_vector = q_vector;
2736 /* update q_vector Tx values */
2737 ixgbevf_add_ring(ring, &q_vector->tx);
2739 /* apply Tx specific ring traits */
2740 ring->count = adapter->tx_ring_count;
2741 ring->queue_index = txr_idx;
2742 ring->reg_idx = reg_idx;
2744 /* assign ring to adapter */
2745 adapter->tx_ring[txr_idx] = ring;
2747 /* update count and index */
2752 /* push pointer to next ring */
2757 /* assign generic ring traits */
2758 ring->dev = &adapter->pdev->dev;
2759 ring->netdev = adapter->netdev;
2761 /* configure backlink on ring */
2762 ring->q_vector = q_vector;
2764 /* update q_vector Tx values */
2765 ixgbevf_add_ring(ring, &q_vector->tx);
2767 /* apply Tx specific ring traits */
2768 ring->count = adapter->tx_ring_count;
2769 ring->queue_index = xdp_idx;
2770 ring->reg_idx = reg_idx;
2773 /* assign ring to adapter */
2774 adapter->xdp_ring[xdp_idx] = ring;
2776 /* update count and index */
2781 /* push pointer to next ring */
2786 /* assign generic ring traits */
2787 ring->dev = &adapter->pdev->dev;
2788 ring->netdev = adapter->netdev;
2790 /* configure backlink on ring */
2791 ring->q_vector = q_vector;
2793 /* update q_vector Rx values */
2794 ixgbevf_add_ring(ring, &q_vector->rx);
2796 /* apply Rx specific ring traits */
2797 ring->count = adapter->rx_ring_count;
2798 ring->queue_index = rxr_idx;
2799 ring->reg_idx = rxr_idx;
2801 /* assign ring to adapter */
2802 adapter->rx_ring[rxr_idx] = ring;
2804 /* update count and index */
2808 /* push pointer to next ring */
2816 * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector
2817 * @adapter: board private structure to initialize
2818 * @v_idx: index of vector in adapter struct
2820 * This function frees the memory allocated to the q_vector. In addition if
2821 * NAPI is enabled it will delete any references to the NAPI struct prior
2822 * to freeing the q_vector.
2824 static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)
2826 struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];
2827 struct ixgbevf_ring *ring;
2829 ixgbevf_for_each_ring(ring, q_vector->tx) {
2830 if (ring_is_xdp(ring))
2831 adapter->xdp_ring[ring->queue_index] = NULL;
2833 adapter->tx_ring[ring->queue_index] = NULL;
2836 ixgbevf_for_each_ring(ring, q_vector->rx)
2837 adapter->rx_ring[ring->queue_index] = NULL;
2839 adapter->q_vector[v_idx] = NULL;
2840 netif_napi_del(&q_vector->napi);
2842 /* ixgbevf_get_stats() might access the rings on this vector,
2843 * we must wait a grace period before freeing it.
2845 kfree_rcu(q_vector, rcu);
2849 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2850 * @adapter: board private structure to initialize
2852 * We allocate one q_vector per queue interrupt. If allocation fails we
2855 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2857 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2858 int rxr_remaining = adapter->num_rx_queues;
2859 int txr_remaining = adapter->num_tx_queues;
2860 int xdp_remaining = adapter->num_xdp_queues;
2861 int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;
2864 if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {
2865 for (; rxr_remaining; v_idx++, q_vectors--) {
2866 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2868 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2869 0, 0, 0, 0, rqpv, rxr_idx);
2873 /* update counts and index */
2874 rxr_remaining -= rqpv;
2879 for (; q_vectors; v_idx++, q_vectors--) {
2880 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2881 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);
2882 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);
2884 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2892 /* update counts and index */
2893 rxr_remaining -= rqpv;
2895 txr_remaining -= tqpv;
2897 xdp_remaining -= xqpv;
2906 ixgbevf_free_q_vector(adapter, v_idx);
2913 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2914 * @adapter: board private structure to initialize
2916 * This function frees the memory allocated to the q_vectors. In addition if
2917 * NAPI is enabled it will delete any references to the NAPI struct prior
2918 * to freeing the q_vector.
2920 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2922 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2926 ixgbevf_free_q_vector(adapter, q_vectors);
2931 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2932 * @adapter: board private structure
2935 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2937 if (!adapter->msix_entries)
2940 pci_disable_msix(adapter->pdev);
2941 kfree(adapter->msix_entries);
2942 adapter->msix_entries = NULL;
2946 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2947 * @adapter: board private structure to initialize
2950 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2954 /* Number of supported queues */
2955 ixgbevf_set_num_queues(adapter);
2957 err = ixgbevf_set_interrupt_capability(adapter);
2959 hw_dbg(&adapter->hw,
2960 "Unable to setup interrupt capabilities\n");
2961 goto err_set_interrupt;
2964 err = ixgbevf_alloc_q_vectors(adapter);
2966 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2967 goto err_alloc_q_vectors;
2970 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",
2971 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
2972 adapter->num_rx_queues, adapter->num_tx_queues,
2973 adapter->num_xdp_queues);
2975 set_bit(__IXGBEVF_DOWN, &adapter->state);
2978 err_alloc_q_vectors:
2979 ixgbevf_reset_interrupt_capability(adapter);
2985 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2986 * @adapter: board private structure to clear interrupt scheme on
2988 * We go through and clear interrupt specific resources and reset the structure
2989 * to pre-load conditions
2991 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2993 adapter->num_tx_queues = 0;
2994 adapter->num_xdp_queues = 0;
2995 adapter->num_rx_queues = 0;
2997 ixgbevf_free_q_vectors(adapter);
2998 ixgbevf_reset_interrupt_capability(adapter);
3002 * ixgbevf_sw_init - Initialize general software structures
3003 * @adapter: board private structure to initialize
3005 * ixgbevf_sw_init initializes the Adapter private data structure.
3006 * Fields are initialized based on PCI device information and
3007 * OS network device settings (MTU size).
3009 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
3011 struct ixgbe_hw *hw = &adapter->hw;
3012 struct pci_dev *pdev = adapter->pdev;
3013 struct net_device *netdev = adapter->netdev;
3016 /* PCI config space info */
3017 hw->vendor_id = pdev->vendor;
3018 hw->device_id = pdev->device;
3019 hw->revision_id = pdev->revision;
3020 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3021 hw->subsystem_device_id = pdev->subsystem_device;
3023 hw->mbx.ops.init_params(hw);
3025 if (hw->mac.type >= ixgbe_mac_X550_vf) {
3026 err = ixgbevf_init_rss_key(adapter);
3031 /* assume legacy case in which PF would only give VF 2 queues */
3032 hw->mac.max_tx_queues = 2;
3033 hw->mac.max_rx_queues = 2;
3035 /* lock to protect mailbox accesses */
3036 spin_lock_init(&adapter->mbx_lock);
3038 err = hw->mac.ops.reset_hw(hw);
3040 dev_info(&pdev->dev,
3041 "PF still in reset state. Is the PF interface up?\n");
3043 err = hw->mac.ops.init_hw(hw);
3045 pr_err("init_shared_code failed: %d\n", err);
3048 ixgbevf_negotiate_api(adapter);
3049 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
3051 dev_info(&pdev->dev, "Error reading MAC address\n");
3052 else if (is_zero_ether_addr(adapter->hw.mac.addr))
3053 dev_info(&pdev->dev,
3054 "MAC address not assigned by administrator.\n");
3055 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
3058 if (!is_valid_ether_addr(netdev->dev_addr)) {
3059 dev_info(&pdev->dev, "Assigning random MAC address\n");
3060 eth_hw_addr_random(netdev);
3061 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
3062 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
3065 /* Enable dynamic interrupt throttling rates */
3066 adapter->rx_itr_setting = 1;
3067 adapter->tx_itr_setting = 1;
3069 /* set default ring sizes */
3070 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
3071 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
3073 set_bit(__IXGBEVF_DOWN, &adapter->state);
3080 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
3082 u32 current_counter = IXGBE_READ_REG(hw, reg); \
3083 if (current_counter < last_counter) \
3084 counter += 0x100000000LL; \
3085 last_counter = current_counter; \
3086 counter &= 0xFFFFFFFF00000000LL; \
3087 counter |= current_counter; \
3090 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
3092 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
3093 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
3094 u64 current_counter = (current_counter_msb << 32) | \
3095 current_counter_lsb; \
3096 if (current_counter < last_counter) \
3097 counter += 0x1000000000LL; \
3098 last_counter = current_counter; \
3099 counter &= 0xFFFFFFF000000000LL; \
3100 counter |= current_counter; \
3103 * ixgbevf_update_stats - Update the board statistics counters.
3104 * @adapter: board private structure
3106 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
3108 struct ixgbe_hw *hw = &adapter->hw;
3109 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
3110 u64 alloc_rx_page = 0, hw_csum_rx_error = 0;
3113 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3114 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3117 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
3118 adapter->stats.vfgprc);
3119 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
3120 adapter->stats.vfgptc);
3121 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
3122 adapter->stats.last_vfgorc,
3123 adapter->stats.vfgorc);
3124 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
3125 adapter->stats.last_vfgotc,
3126 adapter->stats.vfgotc);
3127 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
3128 adapter->stats.vfmprc);
3130 for (i = 0; i < adapter->num_rx_queues; i++) {
3131 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
3133 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
3134 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
3135 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
3136 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
3139 adapter->hw_csum_rx_error = hw_csum_rx_error;
3140 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
3141 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
3142 adapter->alloc_rx_page = alloc_rx_page;
3146 * ixgbevf_service_timer - Timer Call-back
3147 * @t: pointer to timer_list struct
3149 static void ixgbevf_service_timer(struct timer_list *t)
3151 struct ixgbevf_adapter *adapter = from_timer(adapter, t,
3154 /* Reset the timer */
3155 mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
3157 ixgbevf_service_event_schedule(adapter);
3160 static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
3162 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
3166 /* If we're already down or resetting, just bail */
3167 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3168 test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
3169 test_bit(__IXGBEVF_RESETTING, &adapter->state)) {
3174 adapter->tx_timeout_count++;
3176 ixgbevf_reinit_locked(adapter);
3181 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
3182 * @adapter: pointer to the device adapter structure
3184 * This function serves two purposes. First it strobes the interrupt lines
3185 * in order to make certain interrupts are occurring. Secondly it sets the
3186 * bits needed to check for TX hangs. As a result we should immediately
3187 * determine if a hang has occurred.
3189 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
3191 struct ixgbe_hw *hw = &adapter->hw;
3195 /* If we're down or resetting, just bail */
3196 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3197 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3200 /* Force detection of hung controller */
3201 if (netif_carrier_ok(adapter->netdev)) {
3202 for (i = 0; i < adapter->num_tx_queues; i++)
3203 set_check_for_tx_hang(adapter->tx_ring[i]);
3204 for (i = 0; i < adapter->num_xdp_queues; i++)
3205 set_check_for_tx_hang(adapter->xdp_ring[i]);
3208 /* get one bit for every active Tx/Rx interrupt vector */
3209 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
3210 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
3212 if (qv->rx.ring || qv->tx.ring)
3216 /* Cause software interrupt to ensure rings are cleaned */
3217 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
3221 * ixgbevf_watchdog_update_link - update the link status
3222 * @adapter: pointer to the device adapter structure
3224 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
3226 struct ixgbe_hw *hw = &adapter->hw;
3227 u32 link_speed = adapter->link_speed;
3228 bool link_up = adapter->link_up;
3231 spin_lock_bh(&adapter->mbx_lock);
3233 err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3235 spin_unlock_bh(&adapter->mbx_lock);
3237 /* if check for link returns error we will need to reset */
3238 if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
3239 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
3243 adapter->link_up = link_up;
3244 adapter->link_speed = link_speed;
3248 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
3249 * print link up message
3250 * @adapter: pointer to the device adapter structure
3252 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
3254 struct net_device *netdev = adapter->netdev;
3256 /* only continue if link was previously down */
3257 if (netif_carrier_ok(netdev))
3260 dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
3261 (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
3263 (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
3265 (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
3269 netif_carrier_on(netdev);
3273 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
3274 * print link down message
3275 * @adapter: pointer to the adapter structure
3277 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
3279 struct net_device *netdev = adapter->netdev;
3281 adapter->link_speed = 0;
3283 /* only continue if link was up previously */
3284 if (!netif_carrier_ok(netdev))
3287 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
3289 netif_carrier_off(netdev);
3293 * ixgbevf_watchdog_subtask - worker thread to bring link up
3294 * @adapter: board private structure
3296 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
3298 /* if interface is down do nothing */
3299 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3300 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3303 ixgbevf_watchdog_update_link(adapter);
3305 if (adapter->link_up)
3306 ixgbevf_watchdog_link_is_up(adapter);
3308 ixgbevf_watchdog_link_is_down(adapter);
3310 ixgbevf_update_stats(adapter);
3314 * ixgbevf_service_task - manages and runs subtasks
3315 * @work: pointer to work_struct containing our data
3317 static void ixgbevf_service_task(struct work_struct *work)
3319 struct ixgbevf_adapter *adapter = container_of(work,
3320 struct ixgbevf_adapter,
3322 struct ixgbe_hw *hw = &adapter->hw;
3324 if (IXGBE_REMOVED(hw->hw_addr)) {
3325 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
3327 ixgbevf_down(adapter);
3333 ixgbevf_queue_reset_subtask(adapter);
3334 ixgbevf_reset_subtask(adapter);
3335 ixgbevf_watchdog_subtask(adapter);
3336 ixgbevf_check_hang_subtask(adapter);
3338 ixgbevf_service_event_complete(adapter);
3342 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
3343 * @tx_ring: Tx descriptor ring for a specific queue
3345 * Free all transmit software resources
3347 void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
3349 ixgbevf_clean_tx_ring(tx_ring);
3351 vfree(tx_ring->tx_buffer_info);
3352 tx_ring->tx_buffer_info = NULL;
3354 /* if not set, then don't free */
3358 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
3361 tx_ring->desc = NULL;
3365 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
3366 * @adapter: board private structure
3368 * Free all transmit software resources
3370 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
3374 for (i = 0; i < adapter->num_tx_queues; i++)
3375 if (adapter->tx_ring[i]->desc)
3376 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3377 for (i = 0; i < adapter->num_xdp_queues; i++)
3378 if (adapter->xdp_ring[i]->desc)
3379 ixgbevf_free_tx_resources(adapter->xdp_ring[i]);
3383 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
3384 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
3386 * Return 0 on success, negative on failure
3388 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
3390 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3393 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
3394 tx_ring->tx_buffer_info = vmalloc(size);
3395 if (!tx_ring->tx_buffer_info)
3398 u64_stats_init(&tx_ring->syncp);
3400 /* round up to nearest 4K */
3401 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3402 tx_ring->size = ALIGN(tx_ring->size, 4096);
3404 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
3405 &tx_ring->dma, GFP_KERNEL);
3412 vfree(tx_ring->tx_buffer_info);
3413 tx_ring->tx_buffer_info = NULL;
3414 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
3419 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3420 * @adapter: board private structure
3422 * If this function returns with an error, then it's possible one or
3423 * more of the rings is populated (while the rest are not). It is the
3424 * callers duty to clean those orphaned rings.
3426 * Return 0 on success, negative on failure
3428 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3430 int i, j = 0, err = 0;
3432 for (i = 0; i < adapter->num_tx_queues; i++) {
3433 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3436 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3440 for (j = 0; j < adapter->num_xdp_queues; j++) {
3441 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);
3444 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
3450 /* rewind the index freeing the rings as we go */
3452 ixgbevf_free_tx_resources(adapter->xdp_ring[j]);
3454 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3460 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3461 * @adapter: board private structure
3462 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3464 * Returns 0 on success, negative on failure
3466 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
3467 struct ixgbevf_ring *rx_ring)
3471 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3472 rx_ring->rx_buffer_info = vmalloc(size);
3473 if (!rx_ring->rx_buffer_info)
3476 u64_stats_init(&rx_ring->syncp);
3478 /* Round up to nearest 4K */
3479 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3480 rx_ring->size = ALIGN(rx_ring->size, 4096);
3482 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3483 &rx_ring->dma, GFP_KERNEL);
3488 /* XDP RX-queue info */
3489 if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
3490 rx_ring->queue_index, 0) < 0)
3493 rx_ring->xdp_prog = adapter->xdp_prog;
3497 vfree(rx_ring->rx_buffer_info);
3498 rx_ring->rx_buffer_info = NULL;
3499 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3504 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3505 * @adapter: board private structure
3507 * If this function returns with an error, then it's possible one or
3508 * more of the rings is populated (while the rest are not). It is the
3509 * callers duty to clean those orphaned rings.
3511 * Return 0 on success, negative on failure
3513 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3517 for (i = 0; i < adapter->num_rx_queues; i++) {
3518 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);
3521 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3527 /* rewind the index freeing the rings as we go */
3529 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3534 * ixgbevf_free_rx_resources - Free Rx Resources
3535 * @rx_ring: ring to clean the resources from
3537 * Free all receive software resources
3539 void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3541 ixgbevf_clean_rx_ring(rx_ring);
3543 rx_ring->xdp_prog = NULL;
3544 xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
3545 vfree(rx_ring->rx_buffer_info);
3546 rx_ring->rx_buffer_info = NULL;
3548 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3551 rx_ring->desc = NULL;
3555 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3556 * @adapter: board private structure
3558 * Free all receive software resources
3560 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3564 for (i = 0; i < adapter->num_rx_queues; i++)
3565 if (adapter->rx_ring[i]->desc)
3566 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3570 * ixgbevf_open - Called when a network interface is made active
3571 * @netdev: network interface device structure
3573 * Returns 0 on success, negative value on failure
3575 * The open entry point is called when a network interface is made
3576 * active by the system (IFF_UP). At this point all resources needed
3577 * for transmit and receive operations are allocated, the interrupt
3578 * handler is registered with the OS, the watchdog timer is started,
3579 * and the stack is notified that the interface is ready.
3581 int ixgbevf_open(struct net_device *netdev)
3583 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3584 struct ixgbe_hw *hw = &adapter->hw;
3587 /* A previous failure to open the device because of a lack of
3588 * available MSIX vector resources may have reset the number
3589 * of msix vectors variable to zero. The only way to recover
3590 * is to unload/reload the driver and hope that the system has
3591 * been able to recover some MSIX vector resources.
3593 if (!adapter->num_msix_vectors)
3596 if (hw->adapter_stopped) {
3597 ixgbevf_reset(adapter);
3598 /* if adapter is still stopped then PF isn't up and
3599 * the VF can't start.
3601 if (hw->adapter_stopped) {
3602 err = IXGBE_ERR_MBX;
3603 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3604 goto err_setup_reset;
3608 /* disallow open during test */
3609 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3612 netif_carrier_off(netdev);
3614 /* allocate transmit descriptors */
3615 err = ixgbevf_setup_all_tx_resources(adapter);
3619 /* allocate receive descriptors */
3620 err = ixgbevf_setup_all_rx_resources(adapter);
3624 ixgbevf_configure(adapter);
3626 err = ixgbevf_request_irq(adapter);
3630 /* Notify the stack of the actual queue counts. */
3631 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
3633 goto err_set_queues;
3635 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
3637 goto err_set_queues;
3639 ixgbevf_up_complete(adapter);
3644 ixgbevf_free_irq(adapter);
3646 ixgbevf_free_all_rx_resources(adapter);
3648 ixgbevf_free_all_tx_resources(adapter);
3650 ixgbevf_reset(adapter);
3657 * ixgbevf_close_suspend - actions necessary to both suspend and close flows
3658 * @adapter: the private adapter struct
3660 * This function should contain the necessary work common to both suspending
3661 * and closing of the device.
3663 static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)
3665 ixgbevf_down(adapter);
3666 ixgbevf_free_irq(adapter);
3667 ixgbevf_free_all_tx_resources(adapter);
3668 ixgbevf_free_all_rx_resources(adapter);
3672 * ixgbevf_close - Disables a network interface
3673 * @netdev: network interface device structure
3675 * Returns 0, this is not allowed to fail
3677 * The close entry point is called when an interface is de-activated
3678 * by the OS. The hardware is still under the drivers control, but
3679 * needs to be disabled. A global MAC reset is issued to stop the
3680 * hardware, and all transmit and receive resources are freed.
3682 int ixgbevf_close(struct net_device *netdev)
3684 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3686 if (netif_device_present(netdev))
3687 ixgbevf_close_suspend(adapter);
3692 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3694 struct net_device *dev = adapter->netdev;
3696 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
3700 /* if interface is down do nothing */
3701 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3702 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3705 /* Hardware has to reinitialize queues and interrupts to
3706 * match packet buffer alignment. Unfortunately, the
3707 * hardware is not flexible enough to do this dynamically.
3711 if (netif_running(dev))
3714 ixgbevf_clear_interrupt_scheme(adapter);
3715 ixgbevf_init_interrupt_scheme(adapter);
3717 if (netif_running(dev))
3723 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3724 u32 vlan_macip_lens, u32 fceof_saidx,
3725 u32 type_tucmd, u32 mss_l4len_idx)
3727 struct ixgbe_adv_tx_context_desc *context_desc;
3728 u16 i = tx_ring->next_to_use;
3730 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3733 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3735 /* set bits to identify this as an advanced context descriptor */
3736 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3738 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3739 context_desc->fceof_saidx = cpu_to_le32(fceof_saidx);
3740 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
3741 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3744 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3745 struct ixgbevf_tx_buffer *first,
3747 struct ixgbevf_ipsec_tx_data *itd)
3749 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
3750 struct sk_buff *skb = first->skb;
3760 u32 paylen, l4_offset;
3761 u32 fceof_saidx = 0;
3764 if (skb->ip_summed != CHECKSUM_PARTIAL)
3767 if (!skb_is_gso(skb))
3770 err = skb_cow_head(skb, 0);
3774 if (eth_p_mpls(first->protocol))
3775 ip.hdr = skb_inner_network_header(skb);
3777 ip.hdr = skb_network_header(skb);
3778 l4.hdr = skb_checksum_start(skb);
3780 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3781 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3783 /* initialize outer IP header fields */
3784 if (ip.v4->version == 4) {
3785 unsigned char *csum_start = skb_checksum_start(skb);
3786 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
3787 int len = csum_start - trans_start;
3789 /* IP header will have to cancel out any data that
3790 * is not a part of the outer IP header, so set to
3791 * a reverse csum if needed, else init check to 0.
3793 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
3794 csum_fold(csum_partial(trans_start,
3796 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3799 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3800 IXGBE_TX_FLAGS_CSUM |
3801 IXGBE_TX_FLAGS_IPV4;
3803 ip.v6->payload_len = 0;
3804 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3805 IXGBE_TX_FLAGS_CSUM;
3808 /* determine offset of inner transport header */
3809 l4_offset = l4.hdr - skb->data;
3811 /* compute length of segmentation header */
3812 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
3814 /* remove payload length from inner checksum */
3815 paylen = skb->len - l4_offset;
3816 csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
3818 /* update gso size and bytecount with header size */
3819 first->gso_segs = skb_shinfo(skb)->gso_segs;
3820 first->bytecount += (first->gso_segs - 1) * *hdr_len;
3822 /* mss_l4len_id: use 1 as index for TSO */
3823 mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
3824 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3825 mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
3827 fceof_saidx |= itd->pfsa;
3828 type_tucmd |= itd->flags | itd->trailer_len;
3830 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3831 vlan_macip_lens = l4.hdr - ip.hdr;
3832 vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
3833 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3835 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
3841 static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3842 struct ixgbevf_tx_buffer *first,
3843 struct ixgbevf_ipsec_tx_data *itd)
3845 struct sk_buff *skb = first->skb;
3846 u32 vlan_macip_lens = 0;
3847 u32 fceof_saidx = 0;
3850 if (skb->ip_summed != CHECKSUM_PARTIAL)
3853 switch (skb->csum_offset) {
3854 case offsetof(struct tcphdr, check):
3855 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3857 case offsetof(struct udphdr, check):
3859 case offsetof(struct sctphdr, checksum):
3860 /* validate that this is actually an SCTP request */
3861 if (skb_csum_is_sctp(skb)) {
3862 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3867 skb_checksum_help(skb);
3871 if (first->protocol == htons(ETH_P_IP))
3872 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3874 /* update TX checksum flag */
3875 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3876 vlan_macip_lens = skb_checksum_start_offset(skb) -
3877 skb_network_offset(skb);
3879 /* vlan_macip_lens: MACLEN, VLAN tag */
3880 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3881 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3883 fceof_saidx |= itd->pfsa;
3884 type_tucmd |= itd->flags | itd->trailer_len;
3886 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3887 fceof_saidx, type_tucmd, 0);
3890 static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3892 /* set type for advanced descriptor with frame checksum insertion */
3893 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3894 IXGBE_ADVTXD_DCMD_IFCS |
3895 IXGBE_ADVTXD_DCMD_DEXT);
3897 /* set HW VLAN bit if VLAN is present */
3898 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3899 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3901 /* set segmentation enable bits for TSO/FSO */
3902 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3903 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3908 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3909 u32 tx_flags, unsigned int paylen)
3911 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3913 /* enable L4 checksum for TSO and TX checksum offload */
3914 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3915 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3917 /* enble IPv4 checksum for TSO */
3918 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3919 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3922 if (tx_flags & IXGBE_TX_FLAGS_IPSEC)
3923 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC);
3925 /* use index 1 context for TSO/FSO/FCOE/IPSEC */
3926 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC))
3927 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
3929 /* Check Context must be set if Tx switch is enabled, which it
3930 * always is for case where virtual functions are running
3932 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3934 tx_desc->read.olinfo_status = olinfo_status;
3937 static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3938 struct ixgbevf_tx_buffer *first,
3941 struct sk_buff *skb = first->skb;
3942 struct ixgbevf_tx_buffer *tx_buffer;
3943 union ixgbe_adv_tx_desc *tx_desc;
3946 unsigned int data_len, size;
3947 u32 tx_flags = first->tx_flags;
3948 __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3949 u16 i = tx_ring->next_to_use;
3951 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3953 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
3955 size = skb_headlen(skb);
3956 data_len = skb->data_len;
3958 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3962 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
3963 if (dma_mapping_error(tx_ring->dev, dma))
3966 /* record length, and DMA address */
3967 dma_unmap_len_set(tx_buffer, len, size);
3968 dma_unmap_addr_set(tx_buffer, dma, dma);
3970 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3972 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3973 tx_desc->read.cmd_type_len =
3974 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
3978 if (i == tx_ring->count) {
3979 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3982 tx_desc->read.olinfo_status = 0;
3984 dma += IXGBE_MAX_DATA_PER_TXD;
3985 size -= IXGBE_MAX_DATA_PER_TXD;
3987 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3990 if (likely(!data_len))
3993 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
3997 if (i == tx_ring->count) {
3998 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
4001 tx_desc->read.olinfo_status = 0;
4003 size = skb_frag_size(frag);
4006 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
4009 tx_buffer = &tx_ring->tx_buffer_info[i];
4012 /* write last descriptor with RS and EOP bits */
4013 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
4014 tx_desc->read.cmd_type_len = cmd_type;
4016 /* set the timestamp */
4017 first->time_stamp = jiffies;
4019 skb_tx_timestamp(skb);
4021 /* Force memory writes to complete before letting h/w know there
4022 * are new descriptors to fetch. (Only applicable for weak-ordered
4023 * memory model archs, such as IA-64).
4025 * We also need this memory barrier (wmb) to make certain all of the
4026 * status bits have been updated before next_to_watch is written.
4030 /* set next_to_watch value indicating a packet is present */
4031 first->next_to_watch = tx_desc;
4034 if (i == tx_ring->count)
4037 tx_ring->next_to_use = i;
4039 /* notify HW of packet */
4040 ixgbevf_write_tail(tx_ring, i);
4044 dev_err(tx_ring->dev, "TX DMA map failed\n");
4045 tx_buffer = &tx_ring->tx_buffer_info[i];
4047 /* clear dma mappings for failed tx_buffer_info map */
4048 while (tx_buffer != first) {
4049 if (dma_unmap_len(tx_buffer, len))
4050 dma_unmap_page(tx_ring->dev,
4051 dma_unmap_addr(tx_buffer, dma),
4052 dma_unmap_len(tx_buffer, len),
4054 dma_unmap_len_set(tx_buffer, len, 0);
4057 i += tx_ring->count;
4058 tx_buffer = &tx_ring->tx_buffer_info[i];
4061 if (dma_unmap_len(tx_buffer, len))
4062 dma_unmap_single(tx_ring->dev,
4063 dma_unmap_addr(tx_buffer, dma),
4064 dma_unmap_len(tx_buffer, len),
4066 dma_unmap_len_set(tx_buffer, len, 0);
4068 dev_kfree_skb_any(tx_buffer->skb);
4069 tx_buffer->skb = NULL;
4071 tx_ring->next_to_use = i;
4074 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4076 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
4077 /* Herbert's original patch had:
4078 * smp_mb__after_netif_stop_queue();
4079 * but since that doesn't exist yet, just open code it.
4083 /* We need to check again in a case another CPU has just
4084 * made room available.
4086 if (likely(ixgbevf_desc_unused(tx_ring) < size))
4089 /* A reprieve! - use start_queue because it doesn't call schedule */
4090 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
4091 ++tx_ring->tx_stats.restart_queue;
4096 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4098 if (likely(ixgbevf_desc_unused(tx_ring) >= size))
4100 return __ixgbevf_maybe_stop_tx(tx_ring, size);
4103 static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,
4104 struct ixgbevf_ring *tx_ring)
4106 struct ixgbevf_tx_buffer *first;
4109 u16 count = TXD_USE_COUNT(skb_headlen(skb));
4110 struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 };
4111 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4115 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
4117 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
4118 dev_kfree_skb_any(skb);
4119 return NETDEV_TX_OK;
4122 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
4123 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
4124 * + 2 desc gap to keep tail from touching head,
4125 * + 1 desc for context descriptor,
4126 * otherwise try next time
4128 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4129 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
4130 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
4132 count += TXD_USE_COUNT(skb_frag_size(frag));
4135 count += skb_shinfo(skb)->nr_frags;
4137 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
4138 tx_ring->tx_stats.tx_busy++;
4139 return NETDEV_TX_BUSY;
4142 /* record the location of the first descriptor for this packet */
4143 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
4145 first->bytecount = skb->len;
4146 first->gso_segs = 1;
4148 if (skb_vlan_tag_present(skb)) {
4149 tx_flags |= skb_vlan_tag_get(skb);
4150 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4151 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4154 /* record initial flags and protocol */
4155 first->tx_flags = tx_flags;
4156 first->protocol = vlan_get_protocol(skb);
4158 #ifdef CONFIG_IXGBEVF_IPSEC
4159 if (xfrm_offload(skb) && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx))
4162 tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx);
4166 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx);
4168 ixgbevf_tx_map(tx_ring, first, hdr_len);
4170 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
4172 return NETDEV_TX_OK;
4175 dev_kfree_skb_any(first->skb);
4178 return NETDEV_TX_OK;
4181 static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4183 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4184 struct ixgbevf_ring *tx_ring;
4186 if (skb->len <= 0) {
4187 dev_kfree_skb_any(skb);
4188 return NETDEV_TX_OK;
4191 /* The minimum packet size for olinfo paylen is 17 so pad the skb
4192 * in order to meet this minimum size requirement.
4194 if (skb->len < 17) {
4195 if (skb_padto(skb, 17))
4196 return NETDEV_TX_OK;
4200 tx_ring = adapter->tx_ring[skb->queue_mapping];
4201 return ixgbevf_xmit_frame_ring(skb, tx_ring);
4205 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
4206 * @netdev: network interface device structure
4207 * @p: pointer to an address structure
4209 * Returns 0 on success, negative on failure
4211 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
4213 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4214 struct ixgbe_hw *hw = &adapter->hw;
4215 struct sockaddr *addr = p;
4218 if (!is_valid_ether_addr(addr->sa_data))
4219 return -EADDRNOTAVAIL;
4221 spin_lock_bh(&adapter->mbx_lock);
4223 err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
4225 spin_unlock_bh(&adapter->mbx_lock);
4230 ether_addr_copy(hw->mac.addr, addr->sa_data);
4231 ether_addr_copy(hw->mac.perm_addr, addr->sa_data);
4232 ether_addr_copy(netdev->dev_addr, addr->sa_data);
4238 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
4239 * @netdev: network interface device structure
4240 * @new_mtu: new value for maximum frame size
4242 * Returns 0 on success, negative on failure
4244 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
4246 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4247 struct ixgbe_hw *hw = &adapter->hw;
4248 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4251 /* prevent MTU being changed to a size unsupported by XDP */
4252 if (adapter->xdp_prog) {
4253 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");
4257 spin_lock_bh(&adapter->mbx_lock);
4258 /* notify the PF of our intent to use this size of frame */
4259 ret = hw->mac.ops.set_rlpml(hw, max_frame);
4260 spin_unlock_bh(&adapter->mbx_lock);
4264 hw_dbg(hw, "changing MTU from %d to %d\n",
4265 netdev->mtu, new_mtu);
4267 /* must set new MTU before calling down or up */
4268 netdev->mtu = new_mtu;
4270 if (netif_running(netdev))
4271 ixgbevf_reinit_locked(adapter);
4276 static int __maybe_unused ixgbevf_suspend(struct device *dev_d)
4278 struct net_device *netdev = dev_get_drvdata(dev_d);
4279 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4282 netif_device_detach(netdev);
4284 if (netif_running(netdev))
4285 ixgbevf_close_suspend(adapter);
4287 ixgbevf_clear_interrupt_scheme(adapter);
4293 static int __maybe_unused ixgbevf_resume(struct device *dev_d)
4295 struct pci_dev *pdev = to_pci_dev(dev_d);
4296 struct net_device *netdev = pci_get_drvdata(pdev);
4297 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4300 adapter->hw.hw_addr = adapter->io_addr;
4301 smp_mb__before_atomic();
4302 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4303 pci_set_master(pdev);
4305 ixgbevf_reset(adapter);
4308 err = ixgbevf_init_interrupt_scheme(adapter);
4309 if (!err && netif_running(netdev))
4310 err = ixgbevf_open(netdev);
4315 netif_device_attach(netdev);
4320 static void ixgbevf_shutdown(struct pci_dev *pdev)
4322 ixgbevf_suspend(&pdev->dev);
4325 static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,
4326 const struct ixgbevf_ring *ring)
4333 start = u64_stats_fetch_begin_irq(&ring->syncp);
4334 bytes = ring->stats.bytes;
4335 packets = ring->stats.packets;
4336 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4337 stats->tx_bytes += bytes;
4338 stats->tx_packets += packets;
4342 static void ixgbevf_get_stats(struct net_device *netdev,
4343 struct rtnl_link_stats64 *stats)
4345 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4348 const struct ixgbevf_ring *ring;
4351 ixgbevf_update_stats(adapter);
4353 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
4356 for (i = 0; i < adapter->num_rx_queues; i++) {
4357 ring = adapter->rx_ring[i];
4359 start = u64_stats_fetch_begin_irq(&ring->syncp);
4360 bytes = ring->stats.bytes;
4361 packets = ring->stats.packets;
4362 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4363 stats->rx_bytes += bytes;
4364 stats->rx_packets += packets;
4367 for (i = 0; i < adapter->num_tx_queues; i++) {
4368 ring = adapter->tx_ring[i];
4369 ixgbevf_get_tx_ring_stats(stats, ring);
4372 for (i = 0; i < adapter->num_xdp_queues; i++) {
4373 ring = adapter->xdp_ring[i];
4374 ixgbevf_get_tx_ring_stats(stats, ring);
4379 #define IXGBEVF_MAX_MAC_HDR_LEN 127
4380 #define IXGBEVF_MAX_NETWORK_HDR_LEN 511
4382 static netdev_features_t
4383 ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
4384 netdev_features_t features)
4386 unsigned int network_hdr_len, mac_hdr_len;
4388 /* Make certain the headers can be described by a context descriptor */
4389 mac_hdr_len = skb_network_header(skb) - skb->data;
4390 if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
4391 return features & ~(NETIF_F_HW_CSUM |
4393 NETIF_F_HW_VLAN_CTAG_TX |
4397 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
4398 if (unlikely(network_hdr_len > IXGBEVF_MAX_NETWORK_HDR_LEN))
4399 return features & ~(NETIF_F_HW_CSUM |
4404 /* We can only support IPV4 TSO in tunnels if we can mangle the
4405 * inner IP ID field, so strip TSO if MANGLEID is not supported.
4407 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
4408 features &= ~NETIF_F_TSO;
4413 static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
4415 int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
4416 struct ixgbevf_adapter *adapter = netdev_priv(dev);
4417 struct bpf_prog *old_prog;
4419 /* verify ixgbevf ring attributes are sufficient for XDP */
4420 for (i = 0; i < adapter->num_rx_queues; i++) {
4421 struct ixgbevf_ring *ring = adapter->rx_ring[i];
4423 if (frame_size > ixgbevf_rx_bufsz(ring))
4427 old_prog = xchg(&adapter->xdp_prog, prog);
4429 /* If transitioning XDP modes reconfigure rings */
4430 if (!!prog != !!old_prog) {
4431 /* Hardware has to reinitialize queues and interrupts to
4432 * match packet buffer alignment. Unfortunately, the
4433 * hardware is not flexible enough to do this dynamically.
4435 if (netif_running(dev))
4438 ixgbevf_clear_interrupt_scheme(adapter);
4439 ixgbevf_init_interrupt_scheme(adapter);
4441 if (netif_running(dev))
4444 for (i = 0; i < adapter->num_rx_queues; i++)
4445 xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);
4449 bpf_prog_put(old_prog);
4454 static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)
4456 switch (xdp->command) {
4457 case XDP_SETUP_PROG:
4458 return ixgbevf_xdp_setup(dev, xdp->prog);
4464 static const struct net_device_ops ixgbevf_netdev_ops = {
4465 .ndo_open = ixgbevf_open,
4466 .ndo_stop = ixgbevf_close,
4467 .ndo_start_xmit = ixgbevf_xmit_frame,
4468 .ndo_set_rx_mode = ixgbevf_set_rx_mode,
4469 .ndo_get_stats64 = ixgbevf_get_stats,
4470 .ndo_validate_addr = eth_validate_addr,
4471 .ndo_set_mac_address = ixgbevf_set_mac,
4472 .ndo_change_mtu = ixgbevf_change_mtu,
4473 .ndo_tx_timeout = ixgbevf_tx_timeout,
4474 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
4475 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
4476 .ndo_features_check = ixgbevf_features_check,
4477 .ndo_bpf = ixgbevf_xdp,
4480 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
4482 dev->netdev_ops = &ixgbevf_netdev_ops;
4483 ixgbevf_set_ethtool_ops(dev);
4484 dev->watchdog_timeo = 5 * HZ;
4488 * ixgbevf_probe - Device Initialization Routine
4489 * @pdev: PCI device information struct
4490 * @ent: entry in ixgbevf_pci_tbl
4492 * Returns 0 on success, negative on failure
4494 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
4495 * The OS initialization, configuring of the adapter private structure,
4496 * and a hardware reset occur.
4498 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4500 struct net_device *netdev;
4501 struct ixgbevf_adapter *adapter = NULL;
4502 struct ixgbe_hw *hw = NULL;
4503 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
4504 int err, pci_using_dac;
4505 bool disable_dev = false;
4507 err = pci_enable_device(pdev);
4511 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
4514 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
4516 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
4522 err = pci_request_regions(pdev, ixgbevf_driver_name);
4524 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
4528 pci_set_master(pdev);
4530 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
4534 goto err_alloc_etherdev;
4537 SET_NETDEV_DEV(netdev, &pdev->dev);
4539 adapter = netdev_priv(netdev);
4541 adapter->netdev = netdev;
4542 adapter->pdev = pdev;
4545 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
4547 /* call save state here in standalone driver because it relies on
4548 * adapter struct to exist, and needs to call netdev_priv
4550 pci_save_state(pdev);
4552 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
4553 pci_resource_len(pdev, 0));
4554 adapter->io_addr = hw->hw_addr;
4560 ixgbevf_assign_netdev_ops(netdev);
4563 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
4564 hw->mac.type = ii->mac;
4566 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
4567 sizeof(struct ixgbe_mbx_operations));
4569 /* setup the private structure */
4570 err = ixgbevf_sw_init(adapter);
4574 /* The HW MAC address was set and/or determined in sw_init */
4575 if (!is_valid_ether_addr(netdev->dev_addr)) {
4576 pr_err("invalid MAC address\n");
4581 netdev->hw_features = NETIF_F_SG |
4588 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4589 NETIF_F_GSO_GRE_CSUM | \
4590 NETIF_F_GSO_IPXIP4 | \
4591 NETIF_F_GSO_IPXIP6 | \
4592 NETIF_F_GSO_UDP_TUNNEL | \
4593 NETIF_F_GSO_UDP_TUNNEL_CSUM)
4595 netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
4596 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
4597 IXGBEVF_GSO_PARTIAL_FEATURES;
4599 netdev->features = netdev->hw_features;
4602 netdev->features |= NETIF_F_HIGHDMA;
4604 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
4605 netdev->mpls_features |= NETIF_F_SG |
4609 netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;
4610 netdev->hw_enc_features |= netdev->vlan_features;
4612 /* set this bit last since it cannot be part of vlan_features */
4613 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4614 NETIF_F_HW_VLAN_CTAG_RX |
4615 NETIF_F_HW_VLAN_CTAG_TX;
4617 netdev->priv_flags |= IFF_UNICAST_FLT;
4619 /* MTU range: 68 - 1504 or 9710 */
4620 netdev->min_mtu = ETH_MIN_MTU;
4621 switch (adapter->hw.api_version) {
4622 case ixgbe_mbox_api_11:
4623 case ixgbe_mbox_api_12:
4624 case ixgbe_mbox_api_13:
4625 case ixgbe_mbox_api_14:
4626 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4627 (ETH_HLEN + ETH_FCS_LEN);
4630 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
4631 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4632 (ETH_HLEN + ETH_FCS_LEN);
4634 netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;
4638 if (IXGBE_REMOVED(hw->hw_addr)) {
4643 timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);
4645 INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4646 set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4647 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4649 err = ixgbevf_init_interrupt_scheme(adapter);
4653 strcpy(netdev->name, "eth%d");
4655 err = register_netdev(netdev);
4659 pci_set_drvdata(pdev, netdev);
4660 netif_carrier_off(netdev);
4661 ixgbevf_init_ipsec_offload(adapter);
4663 ixgbevf_init_last_counter_stats(adapter);
4665 /* print the VF info */
4666 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4667 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4669 switch (hw->mac.type) {
4670 case ixgbe_mac_X550_vf:
4671 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4673 case ixgbe_mac_X540_vf:
4674 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4676 case ixgbe_mac_82599_vf:
4678 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4685 ixgbevf_clear_interrupt_scheme(adapter);
4687 ixgbevf_reset_interrupt_capability(adapter);
4688 iounmap(adapter->io_addr);
4689 kfree(adapter->rss_key);
4691 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4692 free_netdev(netdev);
4694 pci_release_regions(pdev);
4697 if (!adapter || disable_dev)
4698 pci_disable_device(pdev);
4703 * ixgbevf_remove - Device Removal Routine
4704 * @pdev: PCI device information struct
4706 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4707 * that it should release a PCI device. The could be caused by a
4708 * Hot-Plug event, or because the driver is going to be removed from
4711 static void ixgbevf_remove(struct pci_dev *pdev)
4713 struct net_device *netdev = pci_get_drvdata(pdev);
4714 struct ixgbevf_adapter *adapter;
4720 adapter = netdev_priv(netdev);
4722 set_bit(__IXGBEVF_REMOVING, &adapter->state);
4723 cancel_work_sync(&adapter->service_task);
4725 if (netdev->reg_state == NETREG_REGISTERED)
4726 unregister_netdev(netdev);
4728 ixgbevf_stop_ipsec_offload(adapter);
4729 ixgbevf_clear_interrupt_scheme(adapter);
4730 ixgbevf_reset_interrupt_capability(adapter);
4732 iounmap(adapter->io_addr);
4733 pci_release_regions(pdev);
4735 hw_dbg(&adapter->hw, "Remove complete\n");
4737 kfree(adapter->rss_key);
4738 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4739 free_netdev(netdev);
4742 pci_disable_device(pdev);
4746 * ixgbevf_io_error_detected - called when PCI error is detected
4747 * @pdev: Pointer to PCI device
4748 * @state: The current pci connection state
4750 * This function is called after a PCI bus error affecting
4751 * this device has been detected.
4753 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4754 pci_channel_state_t state)
4756 struct net_device *netdev = pci_get_drvdata(pdev);
4757 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4759 if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4760 return PCI_ERS_RESULT_DISCONNECT;
4763 netif_device_detach(netdev);
4765 if (netif_running(netdev))
4766 ixgbevf_close_suspend(adapter);
4768 if (state == pci_channel_io_perm_failure) {
4770 return PCI_ERS_RESULT_DISCONNECT;
4773 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4774 pci_disable_device(pdev);
4777 /* Request a slot slot reset. */
4778 return PCI_ERS_RESULT_NEED_RESET;
4782 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4783 * @pdev: Pointer to PCI device
4785 * Restart the card from scratch, as if from a cold-boot. Implementation
4786 * resembles the first-half of the ixgbevf_resume routine.
4788 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4790 struct net_device *netdev = pci_get_drvdata(pdev);
4791 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4793 if (pci_enable_device_mem(pdev)) {
4795 "Cannot re-enable PCI device after reset.\n");
4796 return PCI_ERS_RESULT_DISCONNECT;
4799 adapter->hw.hw_addr = adapter->io_addr;
4800 smp_mb__before_atomic();
4801 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4802 pci_set_master(pdev);
4804 ixgbevf_reset(adapter);
4806 return PCI_ERS_RESULT_RECOVERED;
4810 * ixgbevf_io_resume - called when traffic can start flowing again.
4811 * @pdev: Pointer to PCI device
4813 * This callback is called when the error recovery driver tells us that
4814 * its OK to resume normal operation. Implementation resembles the
4815 * second-half of the ixgbevf_resume routine.
4817 static void ixgbevf_io_resume(struct pci_dev *pdev)
4819 struct net_device *netdev = pci_get_drvdata(pdev);
4822 if (netif_running(netdev))
4823 ixgbevf_open(netdev);
4825 netif_device_attach(netdev);
4829 /* PCI Error Recovery (ERS) */
4830 static const struct pci_error_handlers ixgbevf_err_handler = {
4831 .error_detected = ixgbevf_io_error_detected,
4832 .slot_reset = ixgbevf_io_slot_reset,
4833 .resume = ixgbevf_io_resume,
4836 static SIMPLE_DEV_PM_OPS(ixgbevf_pm_ops, ixgbevf_suspend, ixgbevf_resume);
4838 static struct pci_driver ixgbevf_driver = {
4839 .name = ixgbevf_driver_name,
4840 .id_table = ixgbevf_pci_tbl,
4841 .probe = ixgbevf_probe,
4842 .remove = ixgbevf_remove,
4844 /* Power Management Hooks */
4845 .driver.pm = &ixgbevf_pm_ops,
4847 .shutdown = ixgbevf_shutdown,
4848 .err_handler = &ixgbevf_err_handler
4852 * ixgbevf_init_module - Driver Registration Routine
4854 * ixgbevf_init_module is the first routine called when the driver is
4855 * loaded. All it does is register with the PCI subsystem.
4857 static int __init ixgbevf_init_module(void)
4859 pr_info("%s\n", ixgbevf_driver_string);
4860 pr_info("%s\n", ixgbevf_copyright);
4861 ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4863 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4867 return pci_register_driver(&ixgbevf_driver);
4870 module_init(ixgbevf_init_module);
4873 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4875 * ixgbevf_exit_module is called just before the driver is removed
4878 static void __exit ixgbevf_exit_module(void)
4880 pci_unregister_driver(&ixgbevf_driver);
4882 destroy_workqueue(ixgbevf_wq);
4889 * ixgbevf_get_hw_dev_name - return device name string
4890 * used by hardware layer to print debugging information
4891 * @hw: pointer to private hardware struct
4893 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4895 struct ixgbevf_adapter *adapter = hw->back;
4897 return adapter->netdev->name;
4901 module_exit(ixgbevf_exit_module);
4903 /* ixgbevf_main.c */