1 /*******************************************************************************
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2015 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, see <http://www.gnu.org/licenses/>.
18 The full GNU General Public License is included in this distribution in
19 the file called "COPYING".
22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *******************************************************************************/
27 /******************************************************************************
28 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
29 ******************************************************************************/
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 #include <linux/types.h>
34 #include <linux/bitops.h>
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/netdevice.h>
38 #include <linux/vmalloc.h>
39 #include <linux/string.h>
42 #include <linux/tcp.h>
43 #include <linux/sctp.h>
44 #include <linux/ipv6.h>
45 #include <linux/slab.h>
46 #include <net/checksum.h>
47 #include <net/ip6_checksum.h>
48 #include <linux/ethtool.h>
50 #include <linux/if_vlan.h>
51 #include <linux/prefetch.h>
55 const char ixgbevf_driver_name[] = "ixgbevf";
56 static const char ixgbevf_driver_string[] =
57 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
59 #define DRV_VERSION "2.12.1-k"
60 const char ixgbevf_driver_version[] = DRV_VERSION;
61 static char ixgbevf_copyright[] =
62 "Copyright (c) 2009 - 2015 Intel Corporation.";
64 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
65 [board_82599_vf] = &ixgbevf_82599_vf_info,
66 [board_82599_vf_hv] = &ixgbevf_82599_vf_hv_info,
67 [board_X540_vf] = &ixgbevf_X540_vf_info,
68 [board_X540_vf_hv] = &ixgbevf_X540_vf_hv_info,
69 [board_X550_vf] = &ixgbevf_X550_vf_info,
70 [board_X550_vf_hv] = &ixgbevf_X550_vf_hv_info,
71 [board_X550EM_x_vf] = &ixgbevf_X550EM_x_vf_info,
72 [board_X550EM_x_vf_hv] = &ixgbevf_X550EM_x_vf_hv_info,
75 /* ixgbevf_pci_tbl - PCI Device ID Table
77 * Wildcard entries (PCI_ANY_ID) should come last
78 * Last entry must be all 0s
80 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
81 * Class, Class Mask, private data (not used) }
83 static const struct pci_device_id ixgbevf_pci_tbl[] = {
84 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF_HV), board_82599_vf_hv },
86 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF_HV), board_X540_vf_hv },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF_HV), board_X550_vf_hv },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF_HV), board_X550EM_x_vf_hv},
92 /* required last entry */
95 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
97 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
98 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
99 MODULE_LICENSE("GPL");
100 MODULE_VERSION(DRV_VERSION);
102 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
103 static int debug = -1;
104 module_param(debug, int, 0);
105 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
107 static struct workqueue_struct *ixgbevf_wq;
109 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
111 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
112 !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
113 !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
114 queue_work(ixgbevf_wq, &adapter->service_task);
117 static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
119 BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
121 /* flush memory to make sure state is correct before next watchdog */
122 smp_mb__before_atomic();
123 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
127 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
128 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
129 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
131 static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
133 struct ixgbevf_adapter *adapter = hw->back;
138 dev_err(&adapter->pdev->dev, "Adapter removed\n");
139 if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
140 ixgbevf_service_event_schedule(adapter);
143 static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
147 /* The following check not only optimizes a bit by not
148 * performing a read on the status register when the
149 * register just read was a status register read that
150 * returned IXGBE_FAILED_READ_REG. It also blocks any
151 * potential recursion.
153 if (reg == IXGBE_VFSTATUS) {
154 ixgbevf_remove_adapter(hw);
157 value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
158 if (value == IXGBE_FAILED_READ_REG)
159 ixgbevf_remove_adapter(hw);
162 u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
164 u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
167 if (IXGBE_REMOVED(reg_addr))
168 return IXGBE_FAILED_READ_REG;
169 value = readl(reg_addr + reg);
170 if (unlikely(value == IXGBE_FAILED_READ_REG))
171 ixgbevf_check_remove(hw, reg);
176 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
177 * @adapter: pointer to adapter struct
178 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
179 * @queue: queue to map the corresponding interrupt to
180 * @msix_vector: the vector to map to the corresponding queue
182 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
183 u8 queue, u8 msix_vector)
186 struct ixgbe_hw *hw = &adapter->hw;
188 if (direction == -1) {
190 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
191 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
194 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
196 /* Tx or Rx causes */
197 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
198 index = ((16 * (queue & 1)) + (8 * direction));
199 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
200 ivar &= ~(0xFF << index);
201 ivar |= (msix_vector << index);
202 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
206 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
207 struct ixgbevf_tx_buffer *tx_buffer)
209 if (tx_buffer->skb) {
210 dev_kfree_skb_any(tx_buffer->skb);
211 if (dma_unmap_len(tx_buffer, len))
212 dma_unmap_single(tx_ring->dev,
213 dma_unmap_addr(tx_buffer, dma),
214 dma_unmap_len(tx_buffer, len),
216 } else if (dma_unmap_len(tx_buffer, len)) {
217 dma_unmap_page(tx_ring->dev,
218 dma_unmap_addr(tx_buffer, dma),
219 dma_unmap_len(tx_buffer, len),
222 tx_buffer->next_to_watch = NULL;
223 tx_buffer->skb = NULL;
224 dma_unmap_len_set(tx_buffer, len, 0);
225 /* tx_buffer must be completely set up in the transmit path */
228 static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
230 return ring->stats.packets;
233 static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
235 struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
236 struct ixgbe_hw *hw = &adapter->hw;
238 u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
239 u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
242 return (head < tail) ?
243 tail - head : (tail + ring->count - head);
248 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
250 u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
251 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
252 u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
254 clear_check_for_tx_hang(tx_ring);
256 /* Check for a hung queue, but be thorough. This verifies
257 * that a transmit has been completed since the previous
258 * check AND there is at least one packet pending. The
259 * ARMED bit is set to indicate a potential hang.
261 if ((tx_done_old == tx_done) && tx_pending) {
262 /* make sure it is true for two checks in a row */
263 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
266 /* reset the countdown */
267 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
269 /* update completed stats and continue */
270 tx_ring->tx_stats.tx_done_old = tx_done;
275 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
277 /* Do the reset outside of interrupt context */
278 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
279 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
280 ixgbevf_service_event_schedule(adapter);
285 * ixgbevf_tx_timeout - Respond to a Tx Hang
286 * @netdev: network interface device structure
288 static void ixgbevf_tx_timeout(struct net_device *netdev)
290 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
292 ixgbevf_tx_timeout_reset(adapter);
296 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
297 * @q_vector: board private structure
298 * @tx_ring: tx ring to clean
299 * @napi_budget: Used to determine if we are in netpoll
301 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
302 struct ixgbevf_ring *tx_ring, int napi_budget)
304 struct ixgbevf_adapter *adapter = q_vector->adapter;
305 struct ixgbevf_tx_buffer *tx_buffer;
306 union ixgbe_adv_tx_desc *tx_desc;
307 unsigned int total_bytes = 0, total_packets = 0;
308 unsigned int budget = tx_ring->count / 2;
309 unsigned int i = tx_ring->next_to_clean;
311 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
314 tx_buffer = &tx_ring->tx_buffer_info[i];
315 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
319 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
321 /* if next_to_watch is not set then there is no work pending */
325 /* prevent any other reads prior to eop_desc */
326 read_barrier_depends();
328 /* if DD is not set pending work has not been completed */
329 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
332 /* clear next_to_watch to prevent false hangs */
333 tx_buffer->next_to_watch = NULL;
335 /* update the statistics for this packet */
336 total_bytes += tx_buffer->bytecount;
337 total_packets += tx_buffer->gso_segs;
340 napi_consume_skb(tx_buffer->skb, napi_budget);
342 /* unmap skb header data */
343 dma_unmap_single(tx_ring->dev,
344 dma_unmap_addr(tx_buffer, dma),
345 dma_unmap_len(tx_buffer, len),
348 /* clear tx_buffer data */
349 tx_buffer->skb = NULL;
350 dma_unmap_len_set(tx_buffer, len, 0);
352 /* unmap remaining buffers */
353 while (tx_desc != eop_desc) {
359 tx_buffer = tx_ring->tx_buffer_info;
360 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
363 /* unmap any remaining paged data */
364 if (dma_unmap_len(tx_buffer, len)) {
365 dma_unmap_page(tx_ring->dev,
366 dma_unmap_addr(tx_buffer, dma),
367 dma_unmap_len(tx_buffer, len),
369 dma_unmap_len_set(tx_buffer, len, 0);
373 /* move us one more past the eop_desc for start of next pkt */
379 tx_buffer = tx_ring->tx_buffer_info;
380 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
383 /* issue prefetch for next Tx descriptor */
386 /* update budget accounting */
388 } while (likely(budget));
391 tx_ring->next_to_clean = i;
392 u64_stats_update_begin(&tx_ring->syncp);
393 tx_ring->stats.bytes += total_bytes;
394 tx_ring->stats.packets += total_packets;
395 u64_stats_update_end(&tx_ring->syncp);
396 q_vector->tx.total_bytes += total_bytes;
397 q_vector->tx.total_packets += total_packets;
399 if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
400 struct ixgbe_hw *hw = &adapter->hw;
401 union ixgbe_adv_tx_desc *eop_desc;
403 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
405 pr_err("Detected Tx Unit Hang\n"
407 " TDH, TDT <%x>, <%x>\n"
408 " next_to_use <%x>\n"
409 " next_to_clean <%x>\n"
410 "tx_buffer_info[next_to_clean]\n"
411 " next_to_watch <%p>\n"
412 " eop_desc->wb.status <%x>\n"
413 " time_stamp <%lx>\n"
415 tx_ring->queue_index,
416 IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
417 IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
418 tx_ring->next_to_use, i,
419 eop_desc, (eop_desc ? eop_desc->wb.status : 0),
420 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
422 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
424 /* schedule immediate reset if we believe we hung */
425 ixgbevf_tx_timeout_reset(adapter);
430 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
431 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
432 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
433 /* Make sure that anybody stopping the queue after this
434 * sees the new next_to_clean.
438 if (__netif_subqueue_stopped(tx_ring->netdev,
439 tx_ring->queue_index) &&
440 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
441 netif_wake_subqueue(tx_ring->netdev,
442 tx_ring->queue_index);
443 ++tx_ring->tx_stats.restart_queue;
451 * ixgbevf_rx_skb - Helper function to determine proper Rx method
452 * @q_vector: structure containing interrupt and ring information
453 * @skb: packet to send up
455 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
458 #ifdef CONFIG_NET_RX_BUSY_POLL
459 skb_mark_napi_id(skb, &q_vector->napi);
461 if (ixgbevf_qv_busy_polling(q_vector)) {
462 netif_receive_skb(skb);
463 /* exit early if we busy polled */
466 #endif /* CONFIG_NET_RX_BUSY_POLL */
468 napi_gro_receive(&q_vector->napi, skb);
471 #define IXGBE_RSS_L4_TYPES_MASK \
472 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
473 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
474 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
475 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
477 static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
478 union ixgbe_adv_rx_desc *rx_desc,
483 if (!(ring->netdev->features & NETIF_F_RXHASH))
486 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
487 IXGBE_RXDADV_RSSTYPE_MASK;
492 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
493 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
494 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
498 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
499 * @ring: structure containig ring specific data
500 * @rx_desc: current Rx descriptor being processed
501 * @skb: skb currently being received and modified
503 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
504 union ixgbe_adv_rx_desc *rx_desc,
507 skb_checksum_none_assert(skb);
509 /* Rx csum disabled */
510 if (!(ring->netdev->features & NETIF_F_RXCSUM))
513 /* if IP and error */
514 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
515 ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
516 ring->rx_stats.csum_err++;
520 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
523 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
524 ring->rx_stats.csum_err++;
528 /* It must be a TCP or UDP packet with a valid checksum */
529 skb->ip_summed = CHECKSUM_UNNECESSARY;
533 * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
534 * @rx_ring: rx descriptor ring packet is being transacted on
535 * @rx_desc: pointer to the EOP Rx descriptor
536 * @skb: pointer to current skb being populated
538 * This function checks the ring, descriptor, and packet information in
539 * order to populate the checksum, VLAN, protocol, and other fields within
542 static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
543 union ixgbe_adv_rx_desc *rx_desc,
546 ixgbevf_rx_hash(rx_ring, rx_desc, skb);
547 ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
549 if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
550 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
551 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
553 if (test_bit(vid & VLAN_VID_MASK, active_vlans))
554 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
557 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
561 * ixgbevf_is_non_eop - process handling of non-EOP buffers
562 * @rx_ring: Rx ring being processed
563 * @rx_desc: Rx descriptor for current buffer
564 * @skb: current socket buffer containing buffer in progress
566 * This function updates next to clean. If the buffer is an EOP buffer
567 * this function exits returning false, otherwise it will place the
568 * sk_buff in the next buffer to be chained and return true indicating
569 * that this is in fact a non-EOP buffer.
571 static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
572 union ixgbe_adv_rx_desc *rx_desc)
574 u32 ntc = rx_ring->next_to_clean + 1;
576 /* fetch, update, and store next to clean */
577 ntc = (ntc < rx_ring->count) ? ntc : 0;
578 rx_ring->next_to_clean = ntc;
580 prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
582 if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
588 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
589 struct ixgbevf_rx_buffer *bi)
591 struct page *page = bi->page;
592 dma_addr_t dma = bi->dma;
594 /* since we are recycling buffers we should seldom need to alloc */
598 /* alloc new page for storage */
599 page = dev_alloc_page();
600 if (unlikely(!page)) {
601 rx_ring->rx_stats.alloc_rx_page_failed++;
605 /* map page for use */
606 dma = dma_map_page(rx_ring->dev, page, 0,
607 PAGE_SIZE, DMA_FROM_DEVICE);
609 /* if mapping failed free memory back to system since
610 * there isn't much point in holding memory we can't use
612 if (dma_mapping_error(rx_ring->dev, dma)) {
615 rx_ring->rx_stats.alloc_rx_buff_failed++;
627 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
628 * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
629 * @cleaned_count: number of buffers to replace
631 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
634 union ixgbe_adv_rx_desc *rx_desc;
635 struct ixgbevf_rx_buffer *bi;
636 unsigned int i = rx_ring->next_to_use;
638 /* nothing to do or no valid netdev defined */
639 if (!cleaned_count || !rx_ring->netdev)
642 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
643 bi = &rx_ring->rx_buffer_info[i];
647 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
650 /* Refresh the desc even if pkt_addr didn't change
651 * because each write-back erases this info.
653 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
659 rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
660 bi = rx_ring->rx_buffer_info;
664 /* clear the hdr_addr for the next_to_use descriptor */
665 rx_desc->read.hdr_addr = 0;
668 } while (cleaned_count);
672 if (rx_ring->next_to_use != i) {
673 /* record the next descriptor to use */
674 rx_ring->next_to_use = i;
676 /* update next to alloc since we have filled the ring */
677 rx_ring->next_to_alloc = i;
679 /* Force memory writes to complete before letting h/w
680 * know there are new descriptors to fetch. (Only
681 * applicable for weak-ordered memory model archs,
685 ixgbevf_write_tail(rx_ring, i);
690 * ixgbevf_cleanup_headers - Correct corrupted or empty headers
691 * @rx_ring: rx descriptor ring packet is being transacted on
692 * @rx_desc: pointer to the EOP Rx descriptor
693 * @skb: pointer to current skb being fixed
695 * Check for corrupted packet headers caused by senders on the local L2
696 * embedded NIC switch not setting up their Tx Descriptors right. These
697 * should be very rare.
699 * Also address the case where we are pulling data in on pages only
700 * and as such no data is present in the skb header.
702 * In addition if skb is not at least 60 bytes we need to pad it so that
703 * it is large enough to qualify as a valid Ethernet frame.
705 * Returns true if an error was encountered and skb was freed.
707 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
708 union ixgbe_adv_rx_desc *rx_desc,
711 /* verify that the packet does not have any known errors */
712 if (unlikely(ixgbevf_test_staterr(rx_desc,
713 IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
714 struct net_device *netdev = rx_ring->netdev;
716 if (!(netdev->features & NETIF_F_RXALL)) {
717 dev_kfree_skb_any(skb);
722 /* if eth_skb_pad returns an error the skb was freed */
723 if (eth_skb_pad(skb))
730 * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
731 * @rx_ring: rx descriptor ring to store buffers on
732 * @old_buff: donor buffer to have page reused
734 * Synchronizes page for reuse by the adapter
736 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
737 struct ixgbevf_rx_buffer *old_buff)
739 struct ixgbevf_rx_buffer *new_buff;
740 u16 nta = rx_ring->next_to_alloc;
742 new_buff = &rx_ring->rx_buffer_info[nta];
744 /* update, and store next to alloc */
746 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
748 /* transfer page from old buffer to new buffer */
749 new_buff->page = old_buff->page;
750 new_buff->dma = old_buff->dma;
751 new_buff->page_offset = old_buff->page_offset;
753 /* sync the buffer for use by the device */
754 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
755 new_buff->page_offset,
760 static inline bool ixgbevf_page_is_reserved(struct page *page)
762 return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
766 * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
767 * @rx_ring: rx descriptor ring to transact packets on
768 * @rx_buffer: buffer containing page to add
769 * @rx_desc: descriptor containing length of buffer written by hardware
770 * @skb: sk_buff to place the data into
772 * This function will add the data contained in rx_buffer->page to the skb.
773 * This is done either through a direct copy if the data in the buffer is
774 * less than the skb header size, otherwise it will just attach the page as
777 * The function will then update the page offset if necessary and return
778 * true if the buffer can be reused by the adapter.
780 static bool ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
781 struct ixgbevf_rx_buffer *rx_buffer,
782 union ixgbe_adv_rx_desc *rx_desc,
785 struct page *page = rx_buffer->page;
786 unsigned char *va = page_address(page) + rx_buffer->page_offset;
787 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
788 #if (PAGE_SIZE < 8192)
789 unsigned int truesize = IXGBEVF_RX_BUFSZ;
791 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
793 unsigned int pull_len;
795 if (unlikely(skb_is_nonlinear(skb)))
798 if (likely(size <= IXGBEVF_RX_HDR_SIZE)) {
799 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
801 /* page is not reserved, we can reuse buffer as is */
802 if (likely(!ixgbevf_page_is_reserved(page)))
805 /* this page cannot be reused so discard it */
810 /* we need the header to contain the greater of either ETH_HLEN or
811 * 60 bytes if the skb->len is less than 60 for skb_pad.
813 pull_len = eth_get_headlen(va, IXGBEVF_RX_HDR_SIZE);
815 /* align pull length to size of long to optimize memcpy performance */
816 memcpy(__skb_put(skb, pull_len), va, ALIGN(pull_len, sizeof(long)));
818 /* update all of the pointers */
823 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
824 (unsigned long)va & ~PAGE_MASK, size, truesize);
826 /* avoid re-using remote pages */
827 if (unlikely(ixgbevf_page_is_reserved(page)))
830 #if (PAGE_SIZE < 8192)
831 /* if we are only owner of page we can reuse it */
832 if (unlikely(page_count(page) != 1))
835 /* flip page offset to other buffer */
836 rx_buffer->page_offset ^= IXGBEVF_RX_BUFSZ;
839 /* move offset up to the next cache line */
840 rx_buffer->page_offset += truesize;
842 if (rx_buffer->page_offset > (PAGE_SIZE - IXGBEVF_RX_BUFSZ))
846 /* Even if we own the page, we are not allowed to use atomic_set()
847 * This would break get_page_unless_zero() users.
854 static struct sk_buff *ixgbevf_fetch_rx_buffer(struct ixgbevf_ring *rx_ring,
855 union ixgbe_adv_rx_desc *rx_desc,
858 struct ixgbevf_rx_buffer *rx_buffer;
861 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
862 page = rx_buffer->page;
866 void *page_addr = page_address(page) +
867 rx_buffer->page_offset;
869 /* prefetch first cache line of first page */
871 #if L1_CACHE_BYTES < 128
872 prefetch(page_addr + L1_CACHE_BYTES);
875 /* allocate a skb to store the frags */
876 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
877 IXGBEVF_RX_HDR_SIZE);
878 if (unlikely(!skb)) {
879 rx_ring->rx_stats.alloc_rx_buff_failed++;
883 /* we will be copying header into skb->data in
884 * pskb_may_pull so it is in our interest to prefetch
885 * it now to avoid a possible cache miss
887 prefetchw(skb->data);
890 /* we are reusing so sync this buffer for CPU use */
891 dma_sync_single_range_for_cpu(rx_ring->dev,
893 rx_buffer->page_offset,
897 /* pull page into skb */
898 if (ixgbevf_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
899 /* hand second half of page back to the ring */
900 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
902 /* we are not reusing the buffer so unmap it */
903 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
904 PAGE_SIZE, DMA_FROM_DEVICE);
907 /* clear contents of buffer_info */
909 rx_buffer->page = NULL;
914 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
917 struct ixgbe_hw *hw = &adapter->hw;
919 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
922 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
923 struct ixgbevf_ring *rx_ring,
926 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
927 u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
928 struct sk_buff *skb = rx_ring->skb;
930 while (likely(total_rx_packets < budget)) {
931 union ixgbe_adv_rx_desc *rx_desc;
933 /* return some buffers to hardware, one at a time is too slow */
934 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
935 ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
939 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
941 if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_DD))
944 /* This memory barrier is needed to keep us from reading
945 * any other fields out of the rx_desc until we know the
946 * RXD_STAT_DD bit is set
950 /* retrieve a buffer from the ring */
951 skb = ixgbevf_fetch_rx_buffer(rx_ring, rx_desc, skb);
953 /* exit if we failed to retrieve a buffer */
959 /* fetch next buffer in frame if non-eop */
960 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
963 /* verify the packet layout is correct */
964 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
969 /* probably a little skewed due to removing CRC */
970 total_rx_bytes += skb->len;
972 /* Workaround hardware that can't do proper VEPA multicast
975 if ((skb->pkt_type == PACKET_BROADCAST ||
976 skb->pkt_type == PACKET_MULTICAST) &&
977 ether_addr_equal(rx_ring->netdev->dev_addr,
978 eth_hdr(skb)->h_source)) {
979 dev_kfree_skb_irq(skb);
983 /* populate checksum, VLAN, and protocol */
984 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
986 ixgbevf_rx_skb(q_vector, skb);
988 /* reset skb pointer */
991 /* update budget accounting */
995 /* place incomplete frames back on ring for completion */
998 u64_stats_update_begin(&rx_ring->syncp);
999 rx_ring->stats.packets += total_rx_packets;
1000 rx_ring->stats.bytes += total_rx_bytes;
1001 u64_stats_update_end(&rx_ring->syncp);
1002 q_vector->rx.total_packets += total_rx_packets;
1003 q_vector->rx.total_bytes += total_rx_bytes;
1005 return total_rx_packets;
1009 * ixgbevf_poll - NAPI polling calback
1010 * @napi: napi struct with our devices info in it
1011 * @budget: amount of work driver is allowed to do this pass, in packets
1013 * This function will clean more than one or more rings associated with a
1016 static int ixgbevf_poll(struct napi_struct *napi, int budget)
1018 struct ixgbevf_q_vector *q_vector =
1019 container_of(napi, struct ixgbevf_q_vector, napi);
1020 struct ixgbevf_adapter *adapter = q_vector->adapter;
1021 struct ixgbevf_ring *ring;
1022 int per_ring_budget, work_done = 0;
1023 bool clean_complete = true;
1025 ixgbevf_for_each_ring(ring, q_vector->tx) {
1026 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
1027 clean_complete = false;
1032 #ifdef CONFIG_NET_RX_BUSY_POLL
1033 if (!ixgbevf_qv_lock_napi(q_vector))
1037 /* attempt to distribute budget to each queue fairly, but don't allow
1038 * the budget to go below 1 because we'll exit polling
1040 if (q_vector->rx.count > 1)
1041 per_ring_budget = max(budget/q_vector->rx.count, 1);
1043 per_ring_budget = budget;
1045 ixgbevf_for_each_ring(ring, q_vector->rx) {
1046 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1048 work_done += cleaned;
1049 if (cleaned >= per_ring_budget)
1050 clean_complete = false;
1053 #ifdef CONFIG_NET_RX_BUSY_POLL
1054 ixgbevf_qv_unlock_napi(q_vector);
1057 /* If all work not completed, return budget and keep polling */
1058 if (!clean_complete)
1060 /* all work done, exit the polling mode */
1061 napi_complete_done(napi, work_done);
1062 if (adapter->rx_itr_setting == 1)
1063 ixgbevf_set_itr(q_vector);
1064 if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
1065 !test_bit(__IXGBEVF_REMOVING, &adapter->state))
1066 ixgbevf_irq_enable_queues(adapter,
1067 BIT(q_vector->v_idx));
1073 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1074 * @q_vector: structure containing interrupt and ring information
1076 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
1078 struct ixgbevf_adapter *adapter = q_vector->adapter;
1079 struct ixgbe_hw *hw = &adapter->hw;
1080 int v_idx = q_vector->v_idx;
1081 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1083 /* set the WDIS bit to not clear the timer bits and cause an
1084 * immediate assertion of the interrupt
1086 itr_reg |= IXGBE_EITR_CNT_WDIS;
1088 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1091 #ifdef CONFIG_NET_RX_BUSY_POLL
1092 /* must be called with local_bh_disable()d */
1093 static int ixgbevf_busy_poll_recv(struct napi_struct *napi)
1095 struct ixgbevf_q_vector *q_vector =
1096 container_of(napi, struct ixgbevf_q_vector, napi);
1097 struct ixgbevf_adapter *adapter = q_vector->adapter;
1098 struct ixgbevf_ring *ring;
1101 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
1102 return LL_FLUSH_FAILED;
1104 if (!ixgbevf_qv_lock_poll(q_vector))
1105 return LL_FLUSH_BUSY;
1107 ixgbevf_for_each_ring(ring, q_vector->rx) {
1108 found = ixgbevf_clean_rx_irq(q_vector, ring, 4);
1109 #ifdef BP_EXTENDED_STATS
1111 ring->stats.cleaned += found;
1113 ring->stats.misses++;
1119 ixgbevf_qv_unlock_poll(q_vector);
1123 #endif /* CONFIG_NET_RX_BUSY_POLL */
1126 * ixgbevf_configure_msix - Configure MSI-X hardware
1127 * @adapter: board private structure
1129 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1132 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1134 struct ixgbevf_q_vector *q_vector;
1135 int q_vectors, v_idx;
1137 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1138 adapter->eims_enable_mask = 0;
1140 /* Populate the IVAR table and set the ITR values to the
1141 * corresponding register.
1143 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1144 struct ixgbevf_ring *ring;
1146 q_vector = adapter->q_vector[v_idx];
1148 ixgbevf_for_each_ring(ring, q_vector->rx)
1149 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1151 ixgbevf_for_each_ring(ring, q_vector->tx)
1152 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1154 if (q_vector->tx.ring && !q_vector->rx.ring) {
1155 /* Tx only vector */
1156 if (adapter->tx_itr_setting == 1)
1157 q_vector->itr = IXGBE_12K_ITR;
1159 q_vector->itr = adapter->tx_itr_setting;
1161 /* Rx or Rx/Tx vector */
1162 if (adapter->rx_itr_setting == 1)
1163 q_vector->itr = IXGBE_20K_ITR;
1165 q_vector->itr = adapter->rx_itr_setting;
1168 /* add q_vector eims value to global eims_enable_mask */
1169 adapter->eims_enable_mask |= BIT(v_idx);
1171 ixgbevf_write_eitr(q_vector);
1174 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
1175 /* setup eims_other and add value to global eims_enable_mask */
1176 adapter->eims_other = BIT(v_idx);
1177 adapter->eims_enable_mask |= adapter->eims_other;
1180 enum latency_range {
1184 latency_invalid = 255
1188 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1189 * @q_vector: structure containing interrupt and ring information
1190 * @ring_container: structure containing ring performance data
1192 * Stores a new ITR value based on packets and byte
1193 * counts during the last interrupt. The advantage of per interrupt
1194 * computation is faster updates and more accurate ITR for the current
1195 * traffic pattern. Constants in this function were computed
1196 * based on theoretical maximum wire speed and thresholds were set based
1197 * on testing data as well as attempting to minimize response time
1198 * while increasing bulk throughput.
1200 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1201 struct ixgbevf_ring_container *ring_container)
1203 int bytes = ring_container->total_bytes;
1204 int packets = ring_container->total_packets;
1207 u8 itr_setting = ring_container->itr;
1212 /* simple throttle rate management
1213 * 0-20MB/s lowest (100000 ints/s)
1214 * 20-100MB/s low (20000 ints/s)
1215 * 100-1249MB/s bulk (12000 ints/s)
1217 /* what was last interrupt timeslice? */
1218 timepassed_us = q_vector->itr >> 2;
1219 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1221 switch (itr_setting) {
1222 case lowest_latency:
1223 if (bytes_perint > 10)
1224 itr_setting = low_latency;
1227 if (bytes_perint > 20)
1228 itr_setting = bulk_latency;
1229 else if (bytes_perint <= 10)
1230 itr_setting = lowest_latency;
1233 if (bytes_perint <= 20)
1234 itr_setting = low_latency;
1238 /* clear work counters since we have the values we need */
1239 ring_container->total_bytes = 0;
1240 ring_container->total_packets = 0;
1242 /* write updated itr to ring container */
1243 ring_container->itr = itr_setting;
1246 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1248 u32 new_itr = q_vector->itr;
1251 ixgbevf_update_itr(q_vector, &q_vector->tx);
1252 ixgbevf_update_itr(q_vector, &q_vector->rx);
1254 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1256 switch (current_itr) {
1257 /* counts and packets in update_itr are dependent on these numbers */
1258 case lowest_latency:
1259 new_itr = IXGBE_100K_ITR;
1262 new_itr = IXGBE_20K_ITR;
1265 new_itr = IXGBE_12K_ITR;
1271 if (new_itr != q_vector->itr) {
1272 /* do an exponential smoothing */
1273 new_itr = (10 * new_itr * q_vector->itr) /
1274 ((9 * new_itr) + q_vector->itr);
1276 /* save the algorithm value here */
1277 q_vector->itr = new_itr;
1279 ixgbevf_write_eitr(q_vector);
1283 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1285 struct ixgbevf_adapter *adapter = data;
1286 struct ixgbe_hw *hw = &adapter->hw;
1288 hw->mac.get_link_status = 1;
1290 ixgbevf_service_event_schedule(adapter);
1292 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1298 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1300 * @data: pointer to our q_vector struct for this interrupt vector
1302 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1304 struct ixgbevf_q_vector *q_vector = data;
1306 /* EIAM disabled interrupts (on this vector) for us */
1307 if (q_vector->rx.ring || q_vector->tx.ring)
1308 napi_schedule_irqoff(&q_vector->napi);
1313 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
1316 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1318 a->rx_ring[r_idx]->next = q_vector->rx.ring;
1319 q_vector->rx.ring = a->rx_ring[r_idx];
1320 q_vector->rx.count++;
1323 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
1326 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1328 a->tx_ring[t_idx]->next = q_vector->tx.ring;
1329 q_vector->tx.ring = a->tx_ring[t_idx];
1330 q_vector->tx.count++;
1334 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1335 * @adapter: board private structure to initialize
1337 * This function maps descriptor rings to the queue-specific vectors
1338 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1339 * one vector per ring/queue, but on a constrained vector budget, we
1340 * group the rings as "efficiently" as possible. You would add new
1341 * mapping configurations in here.
1343 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
1347 int rxr_idx = 0, txr_idx = 0;
1348 int rxr_remaining = adapter->num_rx_queues;
1349 int txr_remaining = adapter->num_tx_queues;
1353 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1355 /* The ideal configuration...
1356 * We have enough vectors to map one per queue.
1358 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1359 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1360 map_vector_to_rxq(adapter, v_start, rxr_idx);
1362 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1363 map_vector_to_txq(adapter, v_start, txr_idx);
1367 /* If we don't have enough vectors for a 1-to-1
1368 * mapping, we'll have to group them so there are
1369 * multiple queues per vector.
1371 /* Re-adjusting *qpv takes care of the remainder. */
1372 for (i = v_start; i < q_vectors; i++) {
1373 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
1374 for (j = 0; j < rqpv; j++) {
1375 map_vector_to_rxq(adapter, i, rxr_idx);
1380 for (i = v_start; i < q_vectors; i++) {
1381 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
1382 for (j = 0; j < tqpv; j++) {
1383 map_vector_to_txq(adapter, i, txr_idx);
1393 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1394 * @adapter: board private structure
1396 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1397 * interrupts from the kernel.
1399 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1401 struct net_device *netdev = adapter->netdev;
1402 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1406 for (vector = 0; vector < q_vectors; vector++) {
1407 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1408 struct msix_entry *entry = &adapter->msix_entries[vector];
1410 if (q_vector->tx.ring && q_vector->rx.ring) {
1411 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1412 "%s-%s-%d", netdev->name, "TxRx", ri++);
1414 } else if (q_vector->rx.ring) {
1415 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1416 "%s-%s-%d", netdev->name, "rx", ri++);
1417 } else if (q_vector->tx.ring) {
1418 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
1419 "%s-%s-%d", netdev->name, "tx", ti++);
1421 /* skip this unused q_vector */
1424 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1425 q_vector->name, q_vector);
1427 hw_dbg(&adapter->hw,
1428 "request_irq failed for MSIX interrupt Error: %d\n",
1430 goto free_queue_irqs;
1434 err = request_irq(adapter->msix_entries[vector].vector,
1435 &ixgbevf_msix_other, 0, netdev->name, adapter);
1437 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1439 goto free_queue_irqs;
1447 free_irq(adapter->msix_entries[vector].vector,
1448 adapter->q_vector[vector]);
1450 /* This failure is non-recoverable - it indicates the system is
1451 * out of MSIX vector resources and the VF driver cannot run
1452 * without them. Set the number of msix vectors to zero
1453 * indicating that not enough can be allocated. The error
1454 * will be returned to the user indicating device open failed.
1455 * Any further attempts to force the driver to open will also
1456 * fail. The only way to recover is to unload the driver and
1457 * reload it again. If the system has recovered some MSIX
1458 * vectors then it may succeed.
1460 adapter->num_msix_vectors = 0;
1464 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1466 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1468 for (i = 0; i < q_vectors; i++) {
1469 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1471 q_vector->rx.ring = NULL;
1472 q_vector->tx.ring = NULL;
1473 q_vector->rx.count = 0;
1474 q_vector->tx.count = 0;
1479 * ixgbevf_request_irq - initialize interrupts
1480 * @adapter: board private structure
1482 * Attempts to configure interrupts using the best available
1483 * capabilities of the hardware and kernel.
1485 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1487 int err = ixgbevf_request_msix_irqs(adapter);
1490 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1495 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1499 q_vectors = adapter->num_msix_vectors;
1502 free_irq(adapter->msix_entries[i].vector, adapter);
1505 for (; i >= 0; i--) {
1506 /* free only the irqs that were actually requested */
1507 if (!adapter->q_vector[i]->rx.ring &&
1508 !adapter->q_vector[i]->tx.ring)
1511 free_irq(adapter->msix_entries[i].vector,
1512 adapter->q_vector[i]);
1515 ixgbevf_reset_q_vectors(adapter);
1519 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1520 * @adapter: board private structure
1522 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1524 struct ixgbe_hw *hw = &adapter->hw;
1527 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1528 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1529 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1531 IXGBE_WRITE_FLUSH(hw);
1533 for (i = 0; i < adapter->num_msix_vectors; i++)
1534 synchronize_irq(adapter->msix_entries[i].vector);
1538 * ixgbevf_irq_enable - Enable default interrupt generation settings
1539 * @adapter: board private structure
1541 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1543 struct ixgbe_hw *hw = &adapter->hw;
1545 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1546 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1547 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1551 * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1552 * @adapter: board private structure
1553 * @ring: structure containing ring specific data
1555 * Configure the Tx descriptor ring after a reset.
1557 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1558 struct ixgbevf_ring *ring)
1560 struct ixgbe_hw *hw = &adapter->hw;
1561 u64 tdba = ring->dma;
1563 u32 txdctl = IXGBE_TXDCTL_ENABLE;
1564 u8 reg_idx = ring->reg_idx;
1566 /* disable queue to avoid issues while updating state */
1567 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1568 IXGBE_WRITE_FLUSH(hw);
1570 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1571 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1572 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1573 ring->count * sizeof(union ixgbe_adv_tx_desc));
1575 /* disable head writeback */
1576 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1577 IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1579 /* enable relaxed ordering */
1580 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1581 (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1582 IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1584 /* reset head and tail pointers */
1585 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1586 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1587 ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1589 /* reset ntu and ntc to place SW in sync with hardwdare */
1590 ring->next_to_clean = 0;
1591 ring->next_to_use = 0;
1593 /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1594 * to or less than the number of on chip descriptors, which is
1597 txdctl |= (8 << 16); /* WTHRESH = 8 */
1599 /* Setting PTHRESH to 32 both improves performance */
1600 txdctl |= (1u << 8) | /* HTHRESH = 1 */
1601 32; /* PTHRESH = 32 */
1603 clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1605 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1607 /* poll to verify queue is enabled */
1609 usleep_range(1000, 2000);
1610 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1611 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1613 pr_err("Could not enable Tx Queue %d\n", reg_idx);
1617 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1618 * @adapter: board private structure
1620 * Configure the Tx unit of the MAC after a reset.
1622 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1626 /* Setup the HW Tx Head and Tail descriptor pointers */
1627 for (i = 0; i < adapter->num_tx_queues; i++)
1628 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1631 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1633 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1635 struct ixgbe_hw *hw = &adapter->hw;
1638 srrctl = IXGBE_SRRCTL_DROP_EN;
1640 srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
1641 srrctl |= IXGBEVF_RX_BUFSZ >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1642 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1644 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1647 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1649 struct ixgbe_hw *hw = &adapter->hw;
1651 /* PSRTYPE must be initialized in 82599 */
1652 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1653 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1654 IXGBE_PSRTYPE_L2HDR;
1656 if (adapter->num_rx_queues > 1)
1659 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1662 #define IXGBEVF_MAX_RX_DESC_POLL 10
1663 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1664 struct ixgbevf_ring *ring)
1666 struct ixgbe_hw *hw = &adapter->hw;
1667 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1669 u8 reg_idx = ring->reg_idx;
1671 if (IXGBE_REMOVED(hw->hw_addr))
1673 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1674 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1676 /* write value back with RXDCTL.ENABLE bit cleared */
1677 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1679 /* the hardware may take up to 100us to really disable the Rx queue */
1682 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1683 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1686 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1690 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1691 struct ixgbevf_ring *ring)
1693 struct ixgbe_hw *hw = &adapter->hw;
1694 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1696 u8 reg_idx = ring->reg_idx;
1698 if (IXGBE_REMOVED(hw->hw_addr))
1701 usleep_range(1000, 2000);
1702 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1703 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1706 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1710 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1712 struct ixgbe_hw *hw = &adapter->hw;
1713 u32 vfmrqc = 0, vfreta = 0;
1714 u16 rss_i = adapter->num_rx_queues;
1717 /* Fill out hash function seeds */
1718 netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key));
1719 for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
1720 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), adapter->rss_key[i]);
1722 for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1726 adapter->rss_indir_tbl[i] = j;
1728 vfreta |= j << (i & 0x3) * 8;
1730 IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
1735 /* Perform hash on these packet types */
1736 vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
1737 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
1738 IXGBE_VFMRQC_RSS_FIELD_IPV6 |
1739 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
1741 vfmrqc |= IXGBE_VFMRQC_RSSEN;
1743 IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1746 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1747 struct ixgbevf_ring *ring)
1749 struct ixgbe_hw *hw = &adapter->hw;
1750 u64 rdba = ring->dma;
1752 u8 reg_idx = ring->reg_idx;
1754 /* disable queue to avoid issues while updating state */
1755 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1756 ixgbevf_disable_rx_queue(adapter, ring);
1758 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1759 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1760 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1761 ring->count * sizeof(union ixgbe_adv_rx_desc));
1763 #ifndef CONFIG_SPARC
1764 /* enable relaxed ordering */
1765 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1766 IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1768 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1769 IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1770 IXGBE_DCA_RXCTRL_DATA_WRO_EN);
1773 /* reset head and tail pointers */
1774 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1775 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1776 ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1778 /* reset ntu and ntc to place SW in sync with hardwdare */
1779 ring->next_to_clean = 0;
1780 ring->next_to_use = 0;
1781 ring->next_to_alloc = 0;
1783 ixgbevf_configure_srrctl(adapter, reg_idx);
1785 /* allow any size packet since we can handle overflow */
1786 rxdctl &= ~IXGBE_RXDCTL_RLPML_EN;
1788 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1789 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1791 ixgbevf_rx_desc_queue_enable(adapter, ring);
1792 ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1796 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1797 * @adapter: board private structure
1799 * Configure the Rx unit of the MAC after a reset.
1801 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1804 struct ixgbe_hw *hw = &adapter->hw;
1805 struct net_device *netdev = adapter->netdev;
1807 ixgbevf_setup_psrtype(adapter);
1808 if (hw->mac.type >= ixgbe_mac_X550_vf)
1809 ixgbevf_setup_vfmrqc(adapter);
1811 /* notify the PF of our intent to use this size of frame */
1812 hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
1814 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1815 * the Base and Length of the Rx Descriptor Ring
1817 for (i = 0; i < adapter->num_rx_queues; i++)
1818 ixgbevf_configure_rx_ring(adapter, adapter->rx_ring[i]);
1821 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1822 __be16 proto, u16 vid)
1824 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1825 struct ixgbe_hw *hw = &adapter->hw;
1828 spin_lock_bh(&adapter->mbx_lock);
1830 /* add VID to filter table */
1831 err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1833 spin_unlock_bh(&adapter->mbx_lock);
1835 /* translate error return types so error makes sense */
1836 if (err == IXGBE_ERR_MBX)
1839 if (err == IXGBE_ERR_INVALID_ARGUMENT)
1842 set_bit(vid, adapter->active_vlans);
1847 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1848 __be16 proto, u16 vid)
1850 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1851 struct ixgbe_hw *hw = &adapter->hw;
1854 spin_lock_bh(&adapter->mbx_lock);
1856 /* remove VID from filter table */
1857 err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1859 spin_unlock_bh(&adapter->mbx_lock);
1861 clear_bit(vid, adapter->active_vlans);
1866 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1870 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1871 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1872 htons(ETH_P_8021Q), vid);
1875 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1877 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1878 struct ixgbe_hw *hw = &adapter->hw;
1881 if ((netdev_uc_count(netdev)) > 10) {
1882 pr_err("Too many unicast filters - No Space\n");
1886 if (!netdev_uc_empty(netdev)) {
1887 struct netdev_hw_addr *ha;
1889 netdev_for_each_uc_addr(ha, netdev) {
1890 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1894 /* If the list is empty then send message to PF driver to
1895 * clear all MAC VLANs on this VF.
1897 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1904 * ixgbevf_set_rx_mode - Multicast and unicast set
1905 * @netdev: network interface device structure
1907 * The set_rx_method entry point is called whenever the multicast address
1908 * list, unicast address list or the network interface flags are updated.
1909 * This routine is responsible for configuring the hardware for proper
1910 * multicast mode and configuring requested unicast filters.
1912 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1914 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1915 struct ixgbe_hw *hw = &adapter->hw;
1916 unsigned int flags = netdev->flags;
1919 xcast_mode = (flags & IFF_ALLMULTI) ? IXGBEVF_XCAST_MODE_ALLMULTI :
1920 (flags & (IFF_BROADCAST | IFF_MULTICAST)) ?
1921 IXGBEVF_XCAST_MODE_MULTI : IXGBEVF_XCAST_MODE_NONE;
1923 spin_lock_bh(&adapter->mbx_lock);
1925 hw->mac.ops.update_xcast_mode(hw, netdev, xcast_mode);
1927 /* reprogram multicast list */
1928 hw->mac.ops.update_mc_addr_list(hw, netdev);
1930 ixgbevf_write_uc_addr_list(netdev);
1932 spin_unlock_bh(&adapter->mbx_lock);
1935 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1938 struct ixgbevf_q_vector *q_vector;
1939 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1941 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1942 q_vector = adapter->q_vector[q_idx];
1943 #ifdef CONFIG_NET_RX_BUSY_POLL
1944 ixgbevf_qv_init_lock(adapter->q_vector[q_idx]);
1946 napi_enable(&q_vector->napi);
1950 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1953 struct ixgbevf_q_vector *q_vector;
1954 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1956 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1957 q_vector = adapter->q_vector[q_idx];
1958 napi_disable(&q_vector->napi);
1959 #ifdef CONFIG_NET_RX_BUSY_POLL
1960 while (!ixgbevf_qv_disable(adapter->q_vector[q_idx])) {
1961 pr_info("QV %d locked\n", q_idx);
1962 usleep_range(1000, 20000);
1964 #endif /* CONFIG_NET_RX_BUSY_POLL */
1968 static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
1970 struct ixgbe_hw *hw = &adapter->hw;
1971 unsigned int def_q = 0;
1972 unsigned int num_tcs = 0;
1973 unsigned int num_rx_queues = adapter->num_rx_queues;
1974 unsigned int num_tx_queues = adapter->num_tx_queues;
1977 spin_lock_bh(&adapter->mbx_lock);
1979 /* fetch queue configuration from the PF */
1980 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1982 spin_unlock_bh(&adapter->mbx_lock);
1988 /* we need only one Tx queue */
1991 /* update default Tx ring register index */
1992 adapter->tx_ring[0]->reg_idx = def_q;
1994 /* we need as many queues as traffic classes */
1995 num_rx_queues = num_tcs;
1998 /* if we have a bad config abort request queue reset */
1999 if ((adapter->num_rx_queues != num_rx_queues) ||
2000 (adapter->num_tx_queues != num_tx_queues)) {
2001 /* force mailbox timeout to prevent further messages */
2002 hw->mbx.timeout = 0;
2004 /* wait for watchdog to come around and bail us out */
2005 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
2011 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
2013 ixgbevf_configure_dcb(adapter);
2015 ixgbevf_set_rx_mode(adapter->netdev);
2017 ixgbevf_restore_vlan(adapter);
2019 ixgbevf_configure_tx(adapter);
2020 ixgbevf_configure_rx(adapter);
2023 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2025 /* Only save pre-reset stats if there are some */
2026 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2027 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2028 adapter->stats.base_vfgprc;
2029 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2030 adapter->stats.base_vfgptc;
2031 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2032 adapter->stats.base_vfgorc;
2033 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2034 adapter->stats.base_vfgotc;
2035 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2036 adapter->stats.base_vfmprc;
2040 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2042 struct ixgbe_hw *hw = &adapter->hw;
2044 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2045 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2046 adapter->stats.last_vfgorc |=
2047 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2048 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2049 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2050 adapter->stats.last_vfgotc |=
2051 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2052 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2054 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2055 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2056 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2057 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2058 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2061 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2063 struct ixgbe_hw *hw = &adapter->hw;
2064 int api[] = { ixgbe_mbox_api_12,
2067 ixgbe_mbox_api_unknown };
2070 spin_lock_bh(&adapter->mbx_lock);
2072 while (api[idx] != ixgbe_mbox_api_unknown) {
2073 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
2079 spin_unlock_bh(&adapter->mbx_lock);
2082 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2084 struct net_device *netdev = adapter->netdev;
2085 struct ixgbe_hw *hw = &adapter->hw;
2087 ixgbevf_configure_msix(adapter);
2089 spin_lock_bh(&adapter->mbx_lock);
2091 if (is_valid_ether_addr(hw->mac.addr))
2092 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2094 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2096 spin_unlock_bh(&adapter->mbx_lock);
2098 smp_mb__before_atomic();
2099 clear_bit(__IXGBEVF_DOWN, &adapter->state);
2100 ixgbevf_napi_enable_all(adapter);
2102 /* clear any pending interrupts, may auto mask */
2103 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2104 ixgbevf_irq_enable(adapter);
2106 /* enable transmits */
2107 netif_tx_start_all_queues(netdev);
2109 ixgbevf_save_reset_stats(adapter);
2110 ixgbevf_init_last_counter_stats(adapter);
2112 hw->mac.get_link_status = 1;
2113 mod_timer(&adapter->service_timer, jiffies);
2116 void ixgbevf_up(struct ixgbevf_adapter *adapter)
2118 ixgbevf_configure(adapter);
2120 ixgbevf_up_complete(adapter);
2124 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2125 * @rx_ring: ring to free buffers from
2127 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2129 struct device *dev = rx_ring->dev;
2133 /* Free Rx ring sk_buff */
2135 dev_kfree_skb(rx_ring->skb);
2136 rx_ring->skb = NULL;
2139 /* ring already cleared, nothing to do */
2140 if (!rx_ring->rx_buffer_info)
2143 /* Free all the Rx ring pages */
2144 for (i = 0; i < rx_ring->count; i++) {
2145 struct ixgbevf_rx_buffer *rx_buffer;
2147 rx_buffer = &rx_ring->rx_buffer_info[i];
2149 dma_unmap_page(dev, rx_buffer->dma,
2150 PAGE_SIZE, DMA_FROM_DEVICE);
2152 if (rx_buffer->page)
2153 __free_page(rx_buffer->page);
2154 rx_buffer->page = NULL;
2157 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2158 memset(rx_ring->rx_buffer_info, 0, size);
2160 /* Zero out the descriptor ring */
2161 memset(rx_ring->desc, 0, rx_ring->size);
2165 * ixgbevf_clean_tx_ring - Free Tx Buffers
2166 * @tx_ring: ring to be cleaned
2168 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2170 struct ixgbevf_tx_buffer *tx_buffer_info;
2174 if (!tx_ring->tx_buffer_info)
2177 /* Free all the Tx ring sk_buffs */
2178 for (i = 0; i < tx_ring->count; i++) {
2179 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2180 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
2183 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2184 memset(tx_ring->tx_buffer_info, 0, size);
2186 memset(tx_ring->desc, 0, tx_ring->size);
2190 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2191 * @adapter: board private structure
2193 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2197 for (i = 0; i < adapter->num_rx_queues; i++)
2198 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2202 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2203 * @adapter: board private structure
2205 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2209 for (i = 0; i < adapter->num_tx_queues; i++)
2210 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2213 void ixgbevf_down(struct ixgbevf_adapter *adapter)
2215 struct net_device *netdev = adapter->netdev;
2216 struct ixgbe_hw *hw = &adapter->hw;
2219 /* signal that we are down to the interrupt handler */
2220 if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2221 return; /* do nothing if already down */
2223 /* disable all enabled Rx queues */
2224 for (i = 0; i < adapter->num_rx_queues; i++)
2225 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2227 usleep_range(10000, 20000);
2229 netif_tx_stop_all_queues(netdev);
2231 /* call carrier off first to avoid false dev_watchdog timeouts */
2232 netif_carrier_off(netdev);
2233 netif_tx_disable(netdev);
2235 ixgbevf_irq_disable(adapter);
2237 ixgbevf_napi_disable_all(adapter);
2239 del_timer_sync(&adapter->service_timer);
2241 /* disable transmits in the hardware now that interrupts are off */
2242 for (i = 0; i < adapter->num_tx_queues; i++) {
2243 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2245 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2246 IXGBE_TXDCTL_SWFLSH);
2249 if (!pci_channel_offline(adapter->pdev))
2250 ixgbevf_reset(adapter);
2252 ixgbevf_clean_all_tx_rings(adapter);
2253 ixgbevf_clean_all_rx_rings(adapter);
2256 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2258 WARN_ON(in_interrupt());
2260 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2263 ixgbevf_down(adapter);
2264 ixgbevf_up(adapter);
2266 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2269 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2271 struct ixgbe_hw *hw = &adapter->hw;
2272 struct net_device *netdev = adapter->netdev;
2274 if (hw->mac.ops.reset_hw(hw)) {
2275 hw_dbg(hw, "PF still resetting\n");
2277 hw->mac.ops.init_hw(hw);
2278 ixgbevf_negotiate_api(adapter);
2281 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2282 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2283 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2286 adapter->last_reset = jiffies;
2289 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2292 int vector_threshold;
2294 /* We'll want at least 2 (vector_threshold):
2295 * 1) TxQ[0] + RxQ[0] handler
2296 * 2) Other (Link Status Change, etc.)
2298 vector_threshold = MIN_MSIX_COUNT;
2300 /* The more we get, the more we will assign to Tx/Rx Cleanup
2301 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2302 * Right now, we simply care about how many we'll get; we'll
2303 * set them up later while requesting irq's.
2305 vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2306 vector_threshold, vectors);
2309 dev_err(&adapter->pdev->dev,
2310 "Unable to allocate MSI-X interrupts\n");
2311 kfree(adapter->msix_entries);
2312 adapter->msix_entries = NULL;
2316 /* Adjust for only the vectors we'll use, which is minimum
2317 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2318 * vectors we were allocated.
2320 adapter->num_msix_vectors = vectors;
2326 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2327 * @adapter: board private structure to initialize
2329 * This is the top level queue allocation routine. The order here is very
2330 * important, starting with the "most" number of features turned on at once,
2331 * and ending with the smallest set of features. This way large combinations
2332 * can be allocated if they're turned on, and smaller combinations are the
2333 * fallthrough conditions.
2336 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2338 struct ixgbe_hw *hw = &adapter->hw;
2339 unsigned int def_q = 0;
2340 unsigned int num_tcs = 0;
2343 /* Start with base case */
2344 adapter->num_rx_queues = 1;
2345 adapter->num_tx_queues = 1;
2347 spin_lock_bh(&adapter->mbx_lock);
2349 /* fetch queue configuration from the PF */
2350 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2352 spin_unlock_bh(&adapter->mbx_lock);
2357 /* we need as many queues as traffic classes */
2359 adapter->num_rx_queues = num_tcs;
2361 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2363 switch (hw->api_version) {
2364 case ixgbe_mbox_api_11:
2365 case ixgbe_mbox_api_12:
2366 adapter->num_rx_queues = rss;
2367 adapter->num_tx_queues = rss;
2375 * ixgbevf_alloc_queues - Allocate memory for all rings
2376 * @adapter: board private structure to initialize
2378 * We allocate one ring per queue at run-time since we don't know the
2379 * number of queues at compile-time. The polling_netdev array is
2380 * intended for Multiqueue, but should work fine with a single queue.
2382 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
2384 struct ixgbevf_ring *ring;
2387 for (; tx < adapter->num_tx_queues; tx++) {
2388 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
2390 goto err_allocation;
2392 ring->dev = &adapter->pdev->dev;
2393 ring->netdev = adapter->netdev;
2394 ring->count = adapter->tx_ring_count;
2395 ring->queue_index = tx;
2398 adapter->tx_ring[tx] = ring;
2401 for (; rx < adapter->num_rx_queues; rx++) {
2402 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
2404 goto err_allocation;
2406 ring->dev = &adapter->pdev->dev;
2407 ring->netdev = adapter->netdev;
2409 ring->count = adapter->rx_ring_count;
2410 ring->queue_index = rx;
2413 adapter->rx_ring[rx] = ring;
2420 kfree(adapter->tx_ring[--tx]);
2421 adapter->tx_ring[tx] = NULL;
2425 kfree(adapter->rx_ring[--rx]);
2426 adapter->rx_ring[rx] = NULL;
2432 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2433 * @adapter: board private structure to initialize
2435 * Attempt to configure the interrupts using the best available
2436 * capabilities of the hardware and the kernel.
2438 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2440 struct net_device *netdev = adapter->netdev;
2442 int vector, v_budget;
2444 /* It's easy to be greedy for MSI-X vectors, but it really
2445 * doesn't do us much good if we have a lot more vectors
2446 * than CPU's. So let's be conservative and only ask for
2447 * (roughly) the same number of vectors as there are CPU's.
2448 * The default is to use pairs of vectors.
2450 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2451 v_budget = min_t(int, v_budget, num_online_cpus());
2452 v_budget += NON_Q_VECTORS;
2454 /* A failure in MSI-X entry allocation isn't fatal, but it does
2455 * mean we disable MSI-X capabilities of the adapter.
2457 adapter->msix_entries = kcalloc(v_budget,
2458 sizeof(struct msix_entry), GFP_KERNEL);
2459 if (!adapter->msix_entries)
2462 for (vector = 0; vector < v_budget; vector++)
2463 adapter->msix_entries[vector].entry = vector;
2465 err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
2469 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
2473 return netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
2477 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2478 * @adapter: board private structure to initialize
2480 * We allocate one q_vector per queue interrupt. If allocation fails we
2483 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2485 int q_idx, num_q_vectors;
2486 struct ixgbevf_q_vector *q_vector;
2488 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2490 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2491 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2494 q_vector->adapter = adapter;
2495 q_vector->v_idx = q_idx;
2496 netif_napi_add(adapter->netdev, &q_vector->napi,
2498 adapter->q_vector[q_idx] = q_vector;
2506 q_vector = adapter->q_vector[q_idx];
2507 #ifdef CONFIG_NET_RX_BUSY_POLL
2508 napi_hash_del(&q_vector->napi);
2510 netif_napi_del(&q_vector->napi);
2512 adapter->q_vector[q_idx] = NULL;
2518 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2519 * @adapter: board private structure to initialize
2521 * This function frees the memory allocated to the q_vectors. In addition if
2522 * NAPI is enabled it will delete any references to the NAPI struct prior
2523 * to freeing the q_vector.
2525 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2527 int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2529 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2530 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2532 adapter->q_vector[q_idx] = NULL;
2533 #ifdef CONFIG_NET_RX_BUSY_POLL
2534 napi_hash_del(&q_vector->napi);
2536 netif_napi_del(&q_vector->napi);
2542 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2543 * @adapter: board private structure
2546 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2548 pci_disable_msix(adapter->pdev);
2549 kfree(adapter->msix_entries);
2550 adapter->msix_entries = NULL;
2554 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2555 * @adapter: board private structure to initialize
2558 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2562 /* Number of supported queues */
2563 ixgbevf_set_num_queues(adapter);
2565 err = ixgbevf_set_interrupt_capability(adapter);
2567 hw_dbg(&adapter->hw,
2568 "Unable to setup interrupt capabilities\n");
2569 goto err_set_interrupt;
2572 err = ixgbevf_alloc_q_vectors(adapter);
2574 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2575 goto err_alloc_q_vectors;
2578 err = ixgbevf_alloc_queues(adapter);
2580 pr_err("Unable to allocate memory for queues\n");
2581 goto err_alloc_queues;
2584 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
2585 (adapter->num_rx_queues > 1) ? "Enabled" :
2586 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2588 set_bit(__IXGBEVF_DOWN, &adapter->state);
2592 ixgbevf_free_q_vectors(adapter);
2593 err_alloc_q_vectors:
2594 ixgbevf_reset_interrupt_capability(adapter);
2600 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2601 * @adapter: board private structure to clear interrupt scheme on
2603 * We go through and clear interrupt specific resources and reset the structure
2604 * to pre-load conditions
2606 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2610 for (i = 0; i < adapter->num_tx_queues; i++) {
2611 kfree(adapter->tx_ring[i]);
2612 adapter->tx_ring[i] = NULL;
2614 for (i = 0; i < adapter->num_rx_queues; i++) {
2615 kfree(adapter->rx_ring[i]);
2616 adapter->rx_ring[i] = NULL;
2619 adapter->num_tx_queues = 0;
2620 adapter->num_rx_queues = 0;
2622 ixgbevf_free_q_vectors(adapter);
2623 ixgbevf_reset_interrupt_capability(adapter);
2627 * ixgbevf_sw_init - Initialize general software structures
2628 * @adapter: board private structure to initialize
2630 * ixgbevf_sw_init initializes the Adapter private data structure.
2631 * Fields are initialized based on PCI device information and
2632 * OS network device settings (MTU size).
2634 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2636 struct ixgbe_hw *hw = &adapter->hw;
2637 struct pci_dev *pdev = adapter->pdev;
2638 struct net_device *netdev = adapter->netdev;
2641 /* PCI config space info */
2642 hw->vendor_id = pdev->vendor;
2643 hw->device_id = pdev->device;
2644 hw->revision_id = pdev->revision;
2645 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2646 hw->subsystem_device_id = pdev->subsystem_device;
2648 hw->mbx.ops.init_params(hw);
2650 /* assume legacy case in which PF would only give VF 2 queues */
2651 hw->mac.max_tx_queues = 2;
2652 hw->mac.max_rx_queues = 2;
2654 /* lock to protect mailbox accesses */
2655 spin_lock_init(&adapter->mbx_lock);
2657 err = hw->mac.ops.reset_hw(hw);
2659 dev_info(&pdev->dev,
2660 "PF still in reset state. Is the PF interface up?\n");
2662 err = hw->mac.ops.init_hw(hw);
2664 pr_err("init_shared_code failed: %d\n", err);
2667 ixgbevf_negotiate_api(adapter);
2668 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2670 dev_info(&pdev->dev, "Error reading MAC address\n");
2671 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2672 dev_info(&pdev->dev,
2673 "MAC address not assigned by administrator.\n");
2674 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
2677 if (!is_valid_ether_addr(netdev->dev_addr)) {
2678 dev_info(&pdev->dev, "Assigning random MAC address\n");
2679 eth_hw_addr_random(netdev);
2680 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
2681 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
2684 /* Enable dynamic interrupt throttling rates */
2685 adapter->rx_itr_setting = 1;
2686 adapter->tx_itr_setting = 1;
2688 /* set default ring sizes */
2689 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2690 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2692 set_bit(__IXGBEVF_DOWN, &adapter->state);
2699 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2701 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2702 if (current_counter < last_counter) \
2703 counter += 0x100000000LL; \
2704 last_counter = current_counter; \
2705 counter &= 0xFFFFFFFF00000000LL; \
2706 counter |= current_counter; \
2709 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2711 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2712 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2713 u64 current_counter = (current_counter_msb << 32) | \
2714 current_counter_lsb; \
2715 if (current_counter < last_counter) \
2716 counter += 0x1000000000LL; \
2717 last_counter = current_counter; \
2718 counter &= 0xFFFFFFF000000000LL; \
2719 counter |= current_counter; \
2722 * ixgbevf_update_stats - Update the board statistics counters.
2723 * @adapter: board private structure
2725 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2727 struct ixgbe_hw *hw = &adapter->hw;
2730 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2731 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2734 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2735 adapter->stats.vfgprc);
2736 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2737 adapter->stats.vfgptc);
2738 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2739 adapter->stats.last_vfgorc,
2740 adapter->stats.vfgorc);
2741 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2742 adapter->stats.last_vfgotc,
2743 adapter->stats.vfgotc);
2744 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2745 adapter->stats.vfmprc);
2747 for (i = 0; i < adapter->num_rx_queues; i++) {
2748 adapter->hw_csum_rx_error +=
2749 adapter->rx_ring[i]->hw_csum_rx_error;
2750 adapter->rx_ring[i]->hw_csum_rx_error = 0;
2755 * ixgbevf_service_timer - Timer Call-back
2756 * @data: pointer to adapter cast into an unsigned long
2758 static void ixgbevf_service_timer(unsigned long data)
2760 struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2762 /* Reset the timer */
2763 mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
2765 ixgbevf_service_event_schedule(adapter);
2768 static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
2770 if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
2773 /* If we're already down or resetting, just bail */
2774 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2775 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2778 adapter->tx_timeout_count++;
2780 ixgbevf_reinit_locked(adapter);
2784 * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
2785 * @adapter: pointer to the device adapter structure
2787 * This function serves two purposes. First it strobes the interrupt lines
2788 * in order to make certain interrupts are occurring. Secondly it sets the
2789 * bits needed to check for TX hangs. As a result we should immediately
2790 * determine if a hang has occurred.
2792 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
2794 struct ixgbe_hw *hw = &adapter->hw;
2798 /* If we're down or resetting, just bail */
2799 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2800 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2803 /* Force detection of hung controller */
2804 if (netif_carrier_ok(adapter->netdev)) {
2805 for (i = 0; i < adapter->num_tx_queues; i++)
2806 set_check_for_tx_hang(adapter->tx_ring[i]);
2809 /* get one bit for every active Tx/Rx interrupt vector */
2810 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2811 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2813 if (qv->rx.ring || qv->tx.ring)
2817 /* Cause software interrupt to ensure rings are cleaned */
2818 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2822 * ixgbevf_watchdog_update_link - update the link status
2823 * @adapter: pointer to the device adapter structure
2825 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
2827 struct ixgbe_hw *hw = &adapter->hw;
2828 u32 link_speed = adapter->link_speed;
2829 bool link_up = adapter->link_up;
2832 spin_lock_bh(&adapter->mbx_lock);
2834 err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2836 spin_unlock_bh(&adapter->mbx_lock);
2838 /* if check for link returns error we will need to reset */
2839 if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
2840 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
2844 adapter->link_up = link_up;
2845 adapter->link_speed = link_speed;
2849 * ixgbevf_watchdog_link_is_up - update netif_carrier status and
2850 * print link up message
2851 * @adapter: pointer to the device adapter structure
2853 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
2855 struct net_device *netdev = adapter->netdev;
2857 /* only continue if link was previously down */
2858 if (netif_carrier_ok(netdev))
2861 dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
2862 (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
2864 (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
2866 (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
2870 netif_carrier_on(netdev);
2874 * ixgbevf_watchdog_link_is_down - update netif_carrier status and
2875 * print link down message
2876 * @adapter: pointer to the adapter structure
2878 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
2880 struct net_device *netdev = adapter->netdev;
2882 adapter->link_speed = 0;
2884 /* only continue if link was up previously */
2885 if (!netif_carrier_ok(netdev))
2888 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2890 netif_carrier_off(netdev);
2894 * ixgbevf_watchdog_subtask - worker thread to bring link up
2895 * @work: pointer to work_struct containing our data
2897 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
2899 /* if interface is down do nothing */
2900 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2901 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2904 ixgbevf_watchdog_update_link(adapter);
2906 if (adapter->link_up)
2907 ixgbevf_watchdog_link_is_up(adapter);
2909 ixgbevf_watchdog_link_is_down(adapter);
2911 ixgbevf_update_stats(adapter);
2915 * ixgbevf_service_task - manages and runs subtasks
2916 * @work: pointer to work_struct containing our data
2918 static void ixgbevf_service_task(struct work_struct *work)
2920 struct ixgbevf_adapter *adapter = container_of(work,
2921 struct ixgbevf_adapter,
2923 struct ixgbe_hw *hw = &adapter->hw;
2925 if (IXGBE_REMOVED(hw->hw_addr)) {
2926 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
2928 ixgbevf_down(adapter);
2934 ixgbevf_queue_reset_subtask(adapter);
2935 ixgbevf_reset_subtask(adapter);
2936 ixgbevf_watchdog_subtask(adapter);
2937 ixgbevf_check_hang_subtask(adapter);
2939 ixgbevf_service_event_complete(adapter);
2943 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2944 * @tx_ring: Tx descriptor ring for a specific queue
2946 * Free all transmit software resources
2948 void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
2950 ixgbevf_clean_tx_ring(tx_ring);
2952 vfree(tx_ring->tx_buffer_info);
2953 tx_ring->tx_buffer_info = NULL;
2955 /* if not set, then don't free */
2959 dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
2962 tx_ring->desc = NULL;
2966 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2967 * @adapter: board private structure
2969 * Free all transmit software resources
2971 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2975 for (i = 0; i < adapter->num_tx_queues; i++)
2976 if (adapter->tx_ring[i]->desc)
2977 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
2981 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2982 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
2984 * Return 0 on success, negative on failure
2986 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
2990 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2991 tx_ring->tx_buffer_info = vzalloc(size);
2992 if (!tx_ring->tx_buffer_info)
2995 /* round up to nearest 4K */
2996 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2997 tx_ring->size = ALIGN(tx_ring->size, 4096);
2999 tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
3000 &tx_ring->dma, GFP_KERNEL);
3007 vfree(tx_ring->tx_buffer_info);
3008 tx_ring->tx_buffer_info = NULL;
3009 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
3014 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3015 * @adapter: board private structure
3017 * If this function returns with an error, then it's possible one or
3018 * more of the rings is populated (while the rest are not). It is the
3019 * callers duty to clean those orphaned rings.
3021 * Return 0 on success, negative on failure
3023 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3027 for (i = 0; i < adapter->num_tx_queues; i++) {
3028 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3031 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3039 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3040 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3042 * Returns 0 on success, negative on failure
3044 int ixgbevf_setup_rx_resources(struct ixgbevf_ring *rx_ring)
3048 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3049 rx_ring->rx_buffer_info = vzalloc(size);
3050 if (!rx_ring->rx_buffer_info)
3053 /* Round up to nearest 4K */
3054 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3055 rx_ring->size = ALIGN(rx_ring->size, 4096);
3057 rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3058 &rx_ring->dma, GFP_KERNEL);
3065 vfree(rx_ring->rx_buffer_info);
3066 rx_ring->rx_buffer_info = NULL;
3067 dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3072 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3073 * @adapter: board private structure
3075 * If this function returns with an error, then it's possible one or
3076 * more of the rings is populated (while the rest are not). It is the
3077 * callers duty to clean those orphaned rings.
3079 * Return 0 on success, negative on failure
3081 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3085 for (i = 0; i < adapter->num_rx_queues; i++) {
3086 err = ixgbevf_setup_rx_resources(adapter->rx_ring[i]);
3089 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3096 * ixgbevf_free_rx_resources - Free Rx Resources
3097 * @rx_ring: ring to clean the resources from
3099 * Free all receive software resources
3101 void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3103 ixgbevf_clean_rx_ring(rx_ring);
3105 vfree(rx_ring->rx_buffer_info);
3106 rx_ring->rx_buffer_info = NULL;
3108 dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3111 rx_ring->desc = NULL;
3115 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3116 * @adapter: board private structure
3118 * Free all receive software resources
3120 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3124 for (i = 0; i < adapter->num_rx_queues; i++)
3125 if (adapter->rx_ring[i]->desc)
3126 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3130 * ixgbevf_open - Called when a network interface is made active
3131 * @netdev: network interface device structure
3133 * Returns 0 on success, negative value on failure
3135 * The open entry point is called when a network interface is made
3136 * active by the system (IFF_UP). At this point all resources needed
3137 * for transmit and receive operations are allocated, the interrupt
3138 * handler is registered with the OS, the watchdog timer is started,
3139 * and the stack is notified that the interface is ready.
3141 int ixgbevf_open(struct net_device *netdev)
3143 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3144 struct ixgbe_hw *hw = &adapter->hw;
3147 /* A previous failure to open the device because of a lack of
3148 * available MSIX vector resources may have reset the number
3149 * of msix vectors variable to zero. The only way to recover
3150 * is to unload/reload the driver and hope that the system has
3151 * been able to recover some MSIX vector resources.
3153 if (!adapter->num_msix_vectors)
3156 if (hw->adapter_stopped) {
3157 ixgbevf_reset(adapter);
3158 /* if adapter is still stopped then PF isn't up and
3159 * the VF can't start.
3161 if (hw->adapter_stopped) {
3162 err = IXGBE_ERR_MBX;
3163 pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3164 goto err_setup_reset;
3168 /* disallow open during test */
3169 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3172 netif_carrier_off(netdev);
3174 /* allocate transmit descriptors */
3175 err = ixgbevf_setup_all_tx_resources(adapter);
3179 /* allocate receive descriptors */
3180 err = ixgbevf_setup_all_rx_resources(adapter);
3184 ixgbevf_configure(adapter);
3186 /* Map the Tx/Rx rings to the vectors we were allotted.
3187 * if request_irq will be called in this function map_rings
3188 * must be called *before* up_complete
3190 ixgbevf_map_rings_to_vectors(adapter);
3192 err = ixgbevf_request_irq(adapter);
3196 ixgbevf_up_complete(adapter);
3201 ixgbevf_down(adapter);
3203 ixgbevf_free_all_rx_resources(adapter);
3205 ixgbevf_free_all_tx_resources(adapter);
3206 ixgbevf_reset(adapter);
3214 * ixgbevf_close - Disables a network interface
3215 * @netdev: network interface device structure
3217 * Returns 0, this is not allowed to fail
3219 * The close entry point is called when an interface is de-activated
3220 * by the OS. The hardware is still under the drivers control, but
3221 * needs to be disabled. A global MAC reset is issued to stop the
3222 * hardware, and all transmit and receive resources are freed.
3224 int ixgbevf_close(struct net_device *netdev)
3226 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3228 ixgbevf_down(adapter);
3229 ixgbevf_free_irq(adapter);
3231 ixgbevf_free_all_tx_resources(adapter);
3232 ixgbevf_free_all_rx_resources(adapter);
3237 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3239 struct net_device *dev = adapter->netdev;
3241 if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
3245 /* if interface is down do nothing */
3246 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3247 test_bit(__IXGBEVF_RESETTING, &adapter->state))
3250 /* Hardware has to reinitialize queues and interrupts to
3251 * match packet buffer alignment. Unfortunately, the
3252 * hardware is not flexible enough to do this dynamically.
3254 if (netif_running(dev))
3257 ixgbevf_clear_interrupt_scheme(adapter);
3258 ixgbevf_init_interrupt_scheme(adapter);
3260 if (netif_running(dev))
3264 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3265 u32 vlan_macip_lens, u32 type_tucmd,
3268 struct ixgbe_adv_tx_context_desc *context_desc;
3269 u16 i = tx_ring->next_to_use;
3271 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3274 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3276 /* set bits to identify this as an advanced context descriptor */
3277 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3279 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3280 context_desc->seqnum_seed = 0;
3281 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
3282 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3285 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3286 struct ixgbevf_tx_buffer *first,
3289 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
3290 struct sk_buff *skb = first->skb;
3300 u32 paylen, l4_offset;
3303 if (skb->ip_summed != CHECKSUM_PARTIAL)
3306 if (!skb_is_gso(skb))
3309 err = skb_cow_head(skb, 0);
3313 ip.hdr = skb_network_header(skb);
3314 l4.hdr = skb_checksum_start(skb);
3316 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3317 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3319 /* initialize outer IP header fields */
3320 if (ip.v4->version == 4) {
3321 /* IP header will have to cancel out any data that
3322 * is not a part of the outer IP header
3324 ip.v4->check = csum_fold(csum_add(lco_csum(skb),
3325 csum_unfold(l4.tcp->check)));
3326 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3329 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3330 IXGBE_TX_FLAGS_CSUM |
3331 IXGBE_TX_FLAGS_IPV4;
3333 ip.v6->payload_len = 0;
3334 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3335 IXGBE_TX_FLAGS_CSUM;
3338 /* determine offset of inner transport header */
3339 l4_offset = l4.hdr - skb->data;
3341 /* compute length of segmentation header */
3342 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
3344 /* remove payload length from inner checksum */
3345 paylen = skb->len - l4_offset;
3346 csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
3348 /* update gso size and bytecount with header size */
3349 first->gso_segs = skb_shinfo(skb)->gso_segs;
3350 first->bytecount += (first->gso_segs - 1) * *hdr_len;
3352 /* mss_l4len_id: use 1 as index for TSO */
3353 mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
3354 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3355 mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
3357 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3358 vlan_macip_lens = l4.hdr - ip.hdr;
3359 vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
3360 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3362 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3363 type_tucmd, mss_l4len_idx);
3368 static inline bool ixgbevf_ipv6_csum_is_sctp(struct sk_buff *skb)
3370 unsigned int offset = 0;
3372 ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
3374 return offset == skb_checksum_start_offset(skb);
3377 static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3378 struct ixgbevf_tx_buffer *first)
3380 struct sk_buff *skb = first->skb;
3381 u32 vlan_macip_lens = 0;
3384 if (skb->ip_summed != CHECKSUM_PARTIAL)
3387 switch (skb->csum_offset) {
3388 case offsetof(struct tcphdr, check):
3389 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3391 case offsetof(struct udphdr, check):
3393 case offsetof(struct sctphdr, checksum):
3394 /* validate that this is actually an SCTP request */
3395 if (((first->protocol == htons(ETH_P_IP)) &&
3396 (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
3397 ((first->protocol == htons(ETH_P_IPV6)) &&
3398 ixgbevf_ipv6_csum_is_sctp(skb))) {
3399 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3404 skb_checksum_help(skb);
3407 /* update TX checksum flag */
3408 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3409 vlan_macip_lens = skb_checksum_start_offset(skb) -
3410 skb_network_offset(skb);
3412 /* vlan_macip_lens: MACLEN, VLAN tag */
3413 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3414 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3416 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
3419 static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3421 /* set type for advanced descriptor with frame checksum insertion */
3422 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3423 IXGBE_ADVTXD_DCMD_IFCS |
3424 IXGBE_ADVTXD_DCMD_DEXT);
3426 /* set HW VLAN bit if VLAN is present */
3427 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3428 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3430 /* set segmentation enable bits for TSO/FSO */
3431 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3432 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3437 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3438 u32 tx_flags, unsigned int paylen)
3440 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3442 /* enable L4 checksum for TSO and TX checksum offload */
3443 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3444 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3446 /* enble IPv4 checksum for TSO */
3447 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3448 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3450 /* use index 1 context for TSO/FSO/FCOE */
3451 if (tx_flags & IXGBE_TX_FLAGS_TSO)
3452 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
3454 /* Check Context must be set if Tx switch is enabled, which it
3455 * always is for case where virtual functions are running
3457 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3459 tx_desc->read.olinfo_status = olinfo_status;
3462 static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3463 struct ixgbevf_tx_buffer *first,
3467 struct sk_buff *skb = first->skb;
3468 struct ixgbevf_tx_buffer *tx_buffer;
3469 union ixgbe_adv_tx_desc *tx_desc;
3470 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
3471 unsigned int data_len = skb->data_len;
3472 unsigned int size = skb_headlen(skb);
3473 unsigned int paylen = skb->len - hdr_len;
3474 u32 tx_flags = first->tx_flags;
3476 u16 i = tx_ring->next_to_use;
3478 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3480 ixgbevf_tx_olinfo_status(tx_desc, tx_flags, paylen);
3481 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3483 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3484 if (dma_mapping_error(tx_ring->dev, dma))
3487 /* record length, and DMA address */
3488 dma_unmap_len_set(first, len, size);
3489 dma_unmap_addr_set(first, dma, dma);
3491 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3494 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3495 tx_desc->read.cmd_type_len =
3496 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
3500 if (i == tx_ring->count) {
3501 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3505 dma += IXGBE_MAX_DATA_PER_TXD;
3506 size -= IXGBE_MAX_DATA_PER_TXD;
3508 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3509 tx_desc->read.olinfo_status = 0;
3512 if (likely(!data_len))
3515 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
3519 if (i == tx_ring->count) {
3520 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3524 size = skb_frag_size(frag);
3527 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
3529 if (dma_mapping_error(tx_ring->dev, dma))
3532 tx_buffer = &tx_ring->tx_buffer_info[i];
3533 dma_unmap_len_set(tx_buffer, len, size);
3534 dma_unmap_addr_set(tx_buffer, dma, dma);
3536 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3537 tx_desc->read.olinfo_status = 0;
3542 /* write last descriptor with RS and EOP bits */
3543 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
3544 tx_desc->read.cmd_type_len = cmd_type;
3546 /* set the timestamp */
3547 first->time_stamp = jiffies;
3549 /* Force memory writes to complete before letting h/w know there
3550 * are new descriptors to fetch. (Only applicable for weak-ordered
3551 * memory model archs, such as IA-64).
3553 * We also need this memory barrier (wmb) to make certain all of the
3554 * status bits have been updated before next_to_watch is written.
3558 /* set next_to_watch value indicating a packet is present */
3559 first->next_to_watch = tx_desc;
3562 if (i == tx_ring->count)
3565 tx_ring->next_to_use = i;
3567 /* notify HW of packet */
3568 ixgbevf_write_tail(tx_ring, i);
3572 dev_err(tx_ring->dev, "TX DMA map failed\n");
3574 /* clear dma mappings for failed tx_buffer_info map */
3576 tx_buffer = &tx_ring->tx_buffer_info[i];
3577 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer);
3578 if (tx_buffer == first)
3585 tx_ring->next_to_use = i;
3588 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3590 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3591 /* Herbert's original patch had:
3592 * smp_mb__after_netif_stop_queue();
3593 * but since that doesn't exist yet, just open code it.
3597 /* We need to check again in a case another CPU has just
3598 * made room available.
3600 if (likely(ixgbevf_desc_unused(tx_ring) < size))
3603 /* A reprieve! - use start_queue because it doesn't call schedule */
3604 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3605 ++tx_ring->tx_stats.restart_queue;
3610 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3612 if (likely(ixgbevf_desc_unused(tx_ring) >= size))
3614 return __ixgbevf_maybe_stop_tx(tx_ring, size);
3617 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3619 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3620 struct ixgbevf_tx_buffer *first;
3621 struct ixgbevf_ring *tx_ring;
3624 u16 count = TXD_USE_COUNT(skb_headlen(skb));
3625 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3629 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3631 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3632 dev_kfree_skb_any(skb);
3633 return NETDEV_TX_OK;
3636 tx_ring = adapter->tx_ring[skb->queue_mapping];
3638 /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3639 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3640 * + 2 desc gap to keep tail from touching head,
3641 * + 1 desc for context descriptor,
3642 * otherwise try next time
3644 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3645 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3646 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3648 count += skb_shinfo(skb)->nr_frags;
3650 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3651 tx_ring->tx_stats.tx_busy++;
3652 return NETDEV_TX_BUSY;
3655 /* record the location of the first descriptor for this packet */
3656 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
3658 first->bytecount = skb->len;
3659 first->gso_segs = 1;
3661 if (skb_vlan_tag_present(skb)) {
3662 tx_flags |= skb_vlan_tag_get(skb);
3663 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3664 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3667 /* record initial flags and protocol */
3668 first->tx_flags = tx_flags;
3669 first->protocol = vlan_get_protocol(skb);
3671 tso = ixgbevf_tso(tx_ring, first, &hdr_len);
3675 ixgbevf_tx_csum(tx_ring, first);
3677 ixgbevf_tx_map(tx_ring, first, hdr_len);
3679 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3681 return NETDEV_TX_OK;
3684 dev_kfree_skb_any(first->skb);
3687 return NETDEV_TX_OK;
3691 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3692 * @netdev: network interface device structure
3693 * @p: pointer to an address structure
3695 * Returns 0 on success, negative on failure
3697 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3699 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3700 struct ixgbe_hw *hw = &adapter->hw;
3701 struct sockaddr *addr = p;
3704 if (!is_valid_ether_addr(addr->sa_data))
3705 return -EADDRNOTAVAIL;
3707 spin_lock_bh(&adapter->mbx_lock);
3709 err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
3711 spin_unlock_bh(&adapter->mbx_lock);
3716 ether_addr_copy(hw->mac.addr, addr->sa_data);
3717 ether_addr_copy(netdev->dev_addr, addr->sa_data);
3723 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3724 * @netdev: network interface device structure
3725 * @new_mtu: new value for maximum frame size
3727 * Returns 0 on success, negative on failure
3729 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3731 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3732 struct ixgbe_hw *hw = &adapter->hw;
3733 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3734 int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3736 switch (adapter->hw.api_version) {
3737 case ixgbe_mbox_api_11:
3738 case ixgbe_mbox_api_12:
3739 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3742 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
3743 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3747 /* MTU < 68 is an error and causes problems on some kernels */
3748 if ((new_mtu < 68) || (max_frame > max_possible_frame))
3751 hw_dbg(hw, "changing MTU from %d to %d\n",
3752 netdev->mtu, new_mtu);
3753 /* must set new MTU before calling down or up */
3754 netdev->mtu = new_mtu;
3756 /* notify the PF of our intent to use this size of frame */
3757 hw->mac.ops.set_rlpml(hw, max_frame);
3762 #ifdef CONFIG_NET_POLL_CONTROLLER
3763 /* Polling 'interrupt' - used by things like netconsole to send skbs
3764 * without having to re-enable interrupts. It's not called while
3765 * the interrupt routine is executing.
3767 static void ixgbevf_netpoll(struct net_device *netdev)
3769 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3772 /* if interface is down do nothing */
3773 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
3775 for (i = 0; i < adapter->num_rx_queues; i++)
3776 ixgbevf_msix_clean_rings(0, adapter->q_vector[i]);
3778 #endif /* CONFIG_NET_POLL_CONTROLLER */
3780 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3782 struct net_device *netdev = pci_get_drvdata(pdev);
3783 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3788 netif_device_detach(netdev);
3790 if (netif_running(netdev)) {
3792 ixgbevf_down(adapter);
3793 ixgbevf_free_irq(adapter);
3794 ixgbevf_free_all_tx_resources(adapter);
3795 ixgbevf_free_all_rx_resources(adapter);
3799 ixgbevf_clear_interrupt_scheme(adapter);
3802 retval = pci_save_state(pdev);
3807 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
3808 pci_disable_device(pdev);
3814 static int ixgbevf_resume(struct pci_dev *pdev)
3816 struct net_device *netdev = pci_get_drvdata(pdev);
3817 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3820 pci_restore_state(pdev);
3821 /* pci_restore_state clears dev->state_saved so call
3822 * pci_save_state to restore it.
3824 pci_save_state(pdev);
3826 err = pci_enable_device_mem(pdev);
3828 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3831 smp_mb__before_atomic();
3832 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
3833 pci_set_master(pdev);
3835 ixgbevf_reset(adapter);
3838 err = ixgbevf_init_interrupt_scheme(adapter);
3841 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3845 if (netif_running(netdev)) {
3846 err = ixgbevf_open(netdev);
3851 netif_device_attach(netdev);
3856 #endif /* CONFIG_PM */
3857 static void ixgbevf_shutdown(struct pci_dev *pdev)
3859 ixgbevf_suspend(pdev, PMSG_SUSPEND);
3862 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3863 struct rtnl_link_stats64 *stats)
3865 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3868 const struct ixgbevf_ring *ring;
3871 ixgbevf_update_stats(adapter);
3873 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3875 for (i = 0; i < adapter->num_rx_queues; i++) {
3876 ring = adapter->rx_ring[i];
3878 start = u64_stats_fetch_begin_irq(&ring->syncp);
3879 bytes = ring->stats.bytes;
3880 packets = ring->stats.packets;
3881 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
3882 stats->rx_bytes += bytes;
3883 stats->rx_packets += packets;
3886 for (i = 0; i < adapter->num_tx_queues; i++) {
3887 ring = adapter->tx_ring[i];
3889 start = u64_stats_fetch_begin_irq(&ring->syncp);
3890 bytes = ring->stats.bytes;
3891 packets = ring->stats.packets;
3892 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
3893 stats->tx_bytes += bytes;
3894 stats->tx_packets += packets;
3900 #define IXGBEVF_MAX_MAC_HDR_LEN 127
3901 #define IXGBEVF_MAX_NETWORK_HDR_LEN 511
3903 static netdev_features_t
3904 ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
3905 netdev_features_t features)
3907 unsigned int network_hdr_len, mac_hdr_len;
3909 /* Make certain the headers can be described by a context descriptor */
3910 mac_hdr_len = skb_network_header(skb) - skb->data;
3911 if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
3912 return features & ~(NETIF_F_HW_CSUM |
3914 NETIF_F_HW_VLAN_CTAG_TX |
3918 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
3919 if (unlikely(network_hdr_len > IXGBEVF_MAX_NETWORK_HDR_LEN))
3920 return features & ~(NETIF_F_HW_CSUM |
3925 /* We can only support IPV4 TSO in tunnels if we can mangle the
3926 * inner IP ID field, so strip TSO if MANGLEID is not supported.
3928 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
3929 features &= ~NETIF_F_TSO;
3934 static const struct net_device_ops ixgbevf_netdev_ops = {
3935 .ndo_open = ixgbevf_open,
3936 .ndo_stop = ixgbevf_close,
3937 .ndo_start_xmit = ixgbevf_xmit_frame,
3938 .ndo_set_rx_mode = ixgbevf_set_rx_mode,
3939 .ndo_get_stats64 = ixgbevf_get_stats,
3940 .ndo_validate_addr = eth_validate_addr,
3941 .ndo_set_mac_address = ixgbevf_set_mac,
3942 .ndo_change_mtu = ixgbevf_change_mtu,
3943 .ndo_tx_timeout = ixgbevf_tx_timeout,
3944 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
3945 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
3946 #ifdef CONFIG_NET_RX_BUSY_POLL
3947 .ndo_busy_poll = ixgbevf_busy_poll_recv,
3949 #ifdef CONFIG_NET_POLL_CONTROLLER
3950 .ndo_poll_controller = ixgbevf_netpoll,
3952 .ndo_features_check = ixgbevf_features_check,
3955 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3957 dev->netdev_ops = &ixgbevf_netdev_ops;
3958 ixgbevf_set_ethtool_ops(dev);
3959 dev->watchdog_timeo = 5 * HZ;
3963 * ixgbevf_probe - Device Initialization Routine
3964 * @pdev: PCI device information struct
3965 * @ent: entry in ixgbevf_pci_tbl
3967 * Returns 0 on success, negative on failure
3969 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3970 * The OS initialization, configuring of the adapter private structure,
3971 * and a hardware reset occur.
3973 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3975 struct net_device *netdev;
3976 struct ixgbevf_adapter *adapter = NULL;
3977 struct ixgbe_hw *hw = NULL;
3978 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3979 int err, pci_using_dac;
3980 bool disable_dev = false;
3982 err = pci_enable_device(pdev);
3986 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
3989 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3991 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
3997 err = pci_request_regions(pdev, ixgbevf_driver_name);
3999 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
4003 pci_set_master(pdev);
4005 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
4009 goto err_alloc_etherdev;
4012 SET_NETDEV_DEV(netdev, &pdev->dev);
4014 adapter = netdev_priv(netdev);
4016 adapter->netdev = netdev;
4017 adapter->pdev = pdev;
4020 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
4022 /* call save state here in standalone driver because it relies on
4023 * adapter struct to exist, and needs to call netdev_priv
4025 pci_save_state(pdev);
4027 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
4028 pci_resource_len(pdev, 0));
4029 adapter->io_addr = hw->hw_addr;
4035 ixgbevf_assign_netdev_ops(netdev);
4038 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
4039 hw->mac.type = ii->mac;
4041 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
4042 sizeof(struct ixgbe_mbx_operations));
4044 /* setup the private structure */
4045 err = ixgbevf_sw_init(adapter);
4049 /* The HW MAC address was set and/or determined in sw_init */
4050 if (!is_valid_ether_addr(netdev->dev_addr)) {
4051 pr_err("invalid MAC address\n");
4056 netdev->hw_features = NETIF_F_SG |
4063 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4064 NETIF_F_GSO_GRE_CSUM | \
4065 NETIF_F_GSO_IPIP | \
4067 NETIF_F_GSO_UDP_TUNNEL | \
4068 NETIF_F_GSO_UDP_TUNNEL_CSUM)
4070 netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
4071 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
4072 IXGBEVF_GSO_PARTIAL_FEATURES;
4074 netdev->features = netdev->hw_features;
4077 netdev->features |= NETIF_F_HIGHDMA;
4079 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
4080 netdev->mpls_features |= NETIF_F_HW_CSUM;
4081 netdev->hw_enc_features |= netdev->vlan_features;
4083 /* set this bit last since it cannot be part of vlan_features */
4084 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4085 NETIF_F_HW_VLAN_CTAG_RX |
4086 NETIF_F_HW_VLAN_CTAG_TX;
4088 netdev->priv_flags |= IFF_UNICAST_FLT;
4090 if (IXGBE_REMOVED(hw->hw_addr)) {
4095 setup_timer(&adapter->service_timer, &ixgbevf_service_timer,
4096 (unsigned long)adapter);
4098 INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4099 set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4100 clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4102 err = ixgbevf_init_interrupt_scheme(adapter);
4106 strcpy(netdev->name, "eth%d");
4108 err = register_netdev(netdev);
4112 pci_set_drvdata(pdev, netdev);
4113 netif_carrier_off(netdev);
4115 ixgbevf_init_last_counter_stats(adapter);
4117 /* print the VF info */
4118 dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4119 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4121 switch (hw->mac.type) {
4122 case ixgbe_mac_X550_vf:
4123 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4125 case ixgbe_mac_X540_vf:
4126 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4128 case ixgbe_mac_82599_vf:
4130 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4137 ixgbevf_clear_interrupt_scheme(adapter);
4139 ixgbevf_reset_interrupt_capability(adapter);
4140 iounmap(adapter->io_addr);
4142 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4143 free_netdev(netdev);
4145 pci_release_regions(pdev);
4148 if (!adapter || disable_dev)
4149 pci_disable_device(pdev);
4154 * ixgbevf_remove - Device Removal Routine
4155 * @pdev: PCI device information struct
4157 * ixgbevf_remove is called by the PCI subsystem to alert the driver
4158 * that it should release a PCI device. The could be caused by a
4159 * Hot-Plug event, or because the driver is going to be removed from
4162 static void ixgbevf_remove(struct pci_dev *pdev)
4164 struct net_device *netdev = pci_get_drvdata(pdev);
4165 struct ixgbevf_adapter *adapter;
4171 adapter = netdev_priv(netdev);
4173 set_bit(__IXGBEVF_REMOVING, &adapter->state);
4174 cancel_work_sync(&adapter->service_task);
4176 if (netdev->reg_state == NETREG_REGISTERED)
4177 unregister_netdev(netdev);
4179 ixgbevf_clear_interrupt_scheme(adapter);
4180 ixgbevf_reset_interrupt_capability(adapter);
4182 iounmap(adapter->io_addr);
4183 pci_release_regions(pdev);
4185 hw_dbg(&adapter->hw, "Remove complete\n");
4187 disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4188 free_netdev(netdev);
4191 pci_disable_device(pdev);
4195 * ixgbevf_io_error_detected - called when PCI error is detected
4196 * @pdev: Pointer to PCI device
4197 * @state: The current pci connection state
4199 * This function is called after a PCI bus error affecting
4200 * this device has been detected.
4202 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4203 pci_channel_state_t state)
4205 struct net_device *netdev = pci_get_drvdata(pdev);
4206 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4208 if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4209 return PCI_ERS_RESULT_DISCONNECT;
4212 netif_device_detach(netdev);
4214 if (state == pci_channel_io_perm_failure) {
4216 return PCI_ERS_RESULT_DISCONNECT;
4219 if (netif_running(netdev))
4220 ixgbevf_down(adapter);
4222 if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4223 pci_disable_device(pdev);
4226 /* Request a slot slot reset. */
4227 return PCI_ERS_RESULT_NEED_RESET;
4231 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4232 * @pdev: Pointer to PCI device
4234 * Restart the card from scratch, as if from a cold-boot. Implementation
4235 * resembles the first-half of the ixgbevf_resume routine.
4237 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4239 struct net_device *netdev = pci_get_drvdata(pdev);
4240 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4242 if (pci_enable_device_mem(pdev)) {
4244 "Cannot re-enable PCI device after reset.\n");
4245 return PCI_ERS_RESULT_DISCONNECT;
4248 smp_mb__before_atomic();
4249 clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4250 pci_set_master(pdev);
4252 ixgbevf_reset(adapter);
4254 return PCI_ERS_RESULT_RECOVERED;
4258 * ixgbevf_io_resume - called when traffic can start flowing again.
4259 * @pdev: Pointer to PCI device
4261 * This callback is called when the error recovery driver tells us that
4262 * its OK to resume normal operation. Implementation resembles the
4263 * second-half of the ixgbevf_resume routine.
4265 static void ixgbevf_io_resume(struct pci_dev *pdev)
4267 struct net_device *netdev = pci_get_drvdata(pdev);
4268 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4270 if (netif_running(netdev))
4271 ixgbevf_up(adapter);
4273 netif_device_attach(netdev);
4276 /* PCI Error Recovery (ERS) */
4277 static const struct pci_error_handlers ixgbevf_err_handler = {
4278 .error_detected = ixgbevf_io_error_detected,
4279 .slot_reset = ixgbevf_io_slot_reset,
4280 .resume = ixgbevf_io_resume,
4283 static struct pci_driver ixgbevf_driver = {
4284 .name = ixgbevf_driver_name,
4285 .id_table = ixgbevf_pci_tbl,
4286 .probe = ixgbevf_probe,
4287 .remove = ixgbevf_remove,
4289 /* Power Management Hooks */
4290 .suspend = ixgbevf_suspend,
4291 .resume = ixgbevf_resume,
4293 .shutdown = ixgbevf_shutdown,
4294 .err_handler = &ixgbevf_err_handler
4298 * ixgbevf_init_module - Driver Registration Routine
4300 * ixgbevf_init_module is the first routine called when the driver is
4301 * loaded. All it does is register with the PCI subsystem.
4303 static int __init ixgbevf_init_module(void)
4305 pr_info("%s - version %s\n", ixgbevf_driver_string,
4306 ixgbevf_driver_version);
4308 pr_info("%s\n", ixgbevf_copyright);
4309 ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4311 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4315 return pci_register_driver(&ixgbevf_driver);
4318 module_init(ixgbevf_init_module);
4321 * ixgbevf_exit_module - Driver Exit Cleanup Routine
4323 * ixgbevf_exit_module is called just before the driver is removed
4326 static void __exit ixgbevf_exit_module(void)
4328 pci_unregister_driver(&ixgbevf_driver);
4330 destroy_workqueue(ixgbevf_wq);
4337 * ixgbevf_get_hw_dev_name - return device name string
4338 * used by hardware layer to print debugging information
4340 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4342 struct ixgbevf_adapter *adapter = hw->back;
4344 return adapter->netdev->name;
4348 module_exit(ixgbevf_exit_module);
4350 /* ixgbevf_main.c */