1 /*******************************************************************************
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2012 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, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
29 /******************************************************************************
30 Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
31 ******************************************************************************/
33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35 #include <linux/types.h>
36 #include <linux/bitops.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/netdevice.h>
40 #include <linux/vmalloc.h>
41 #include <linux/string.h>
44 #include <linux/tcp.h>
45 #include <linux/sctp.h>
46 #include <linux/ipv6.h>
47 #include <linux/slab.h>
48 #include <net/checksum.h>
49 #include <net/ip6_checksum.h>
50 #include <linux/ethtool.h>
52 #include <linux/if_vlan.h>
53 #include <linux/prefetch.h>
57 const char ixgbevf_driver_name[] = "ixgbevf";
58 static const char ixgbevf_driver_string[] =
59 "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
61 #define DRV_VERSION "2.11.3-k"
62 const char ixgbevf_driver_version[] = DRV_VERSION;
63 static char ixgbevf_copyright[] =
64 "Copyright (c) 2009 - 2012 Intel Corporation.";
66 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
67 [board_82599_vf] = &ixgbevf_82599_vf_info,
68 [board_X540_vf] = &ixgbevf_X540_vf_info,
71 /* ixgbevf_pci_tbl - PCI Device ID Table
73 * Wildcard entries (PCI_ANY_ID) should come last
74 * Last entry must be all 0s
76 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
77 * Class, Class Mask, private data (not used) }
79 static DEFINE_PCI_DEVICE_TABLE(ixgbevf_pci_tbl) = {
80 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
82 /* required last entry */
85 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
87 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
88 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
89 MODULE_LICENSE("GPL");
90 MODULE_VERSION(DRV_VERSION);
92 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
93 static int debug = -1;
94 module_param(debug, int, 0);
95 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
98 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
99 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
101 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
102 struct ixgbevf_ring *rx_ring,
106 * Force memory writes to complete before letting h/w
107 * know there are new descriptors to fetch. (Only
108 * applicable for weak-ordered memory model archs,
112 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
116 * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
117 * @adapter: pointer to adapter struct
118 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
119 * @queue: queue to map the corresponding interrupt to
120 * @msix_vector: the vector to map to the corresponding queue
122 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
123 u8 queue, u8 msix_vector)
126 struct ixgbe_hw *hw = &adapter->hw;
127 if (direction == -1) {
129 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
130 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
133 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
135 /* tx or rx causes */
136 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
137 index = ((16 * (queue & 1)) + (8 * direction));
138 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
139 ivar &= ~(0xFF << index);
140 ivar |= (msix_vector << index);
141 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
145 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
146 struct ixgbevf_tx_buffer
149 if (tx_buffer_info->dma) {
150 if (tx_buffer_info->mapped_as_page)
151 dma_unmap_page(tx_ring->dev,
153 tx_buffer_info->length,
156 dma_unmap_single(tx_ring->dev,
158 tx_buffer_info->length,
160 tx_buffer_info->dma = 0;
162 if (tx_buffer_info->skb) {
163 dev_kfree_skb_any(tx_buffer_info->skb);
164 tx_buffer_info->skb = NULL;
166 tx_buffer_info->time_stamp = 0;
167 /* tx_buffer_info must be completely set up in the transmit path */
170 #define IXGBE_MAX_TXD_PWR 14
171 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
173 /* Tx Descriptors needed, worst case */
174 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
175 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
177 static void ixgbevf_tx_timeout(struct net_device *netdev);
180 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
181 * @q_vector: board private structure
182 * @tx_ring: tx ring to clean
184 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
185 struct ixgbevf_ring *tx_ring)
187 struct ixgbevf_adapter *adapter = q_vector->adapter;
188 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
189 struct ixgbevf_tx_buffer *tx_buffer_info;
190 unsigned int i, count = 0;
191 unsigned int total_bytes = 0, total_packets = 0;
193 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
196 i = tx_ring->next_to_clean;
197 tx_buffer_info = &tx_ring->tx_buffer_info[i];
198 eop_desc = tx_buffer_info->next_to_watch;
201 bool cleaned = false;
203 /* if next_to_watch is not set then there is no work pending */
207 /* prevent any other reads prior to eop_desc */
208 read_barrier_depends();
210 /* if DD is not set pending work has not been completed */
211 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
214 /* clear next_to_watch to prevent false hangs */
215 tx_buffer_info->next_to_watch = NULL;
217 for ( ; !cleaned; count++) {
219 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
220 cleaned = (tx_desc == eop_desc);
221 skb = tx_buffer_info->skb;
223 if (cleaned && skb) {
224 unsigned int segs, bytecount;
226 /* gso_segs is currently only valid for tcp */
227 segs = skb_shinfo(skb)->gso_segs ?: 1;
228 /* multiply data chunks by size of headers */
229 bytecount = ((segs - 1) * skb_headlen(skb)) +
231 total_packets += segs;
232 total_bytes += bytecount;
235 ixgbevf_unmap_and_free_tx_resource(tx_ring,
238 tx_desc->wb.status = 0;
241 if (i == tx_ring->count)
244 tx_buffer_info = &tx_ring->tx_buffer_info[i];
247 eop_desc = tx_buffer_info->next_to_watch;
248 } while (count < tx_ring->count);
250 tx_ring->next_to_clean = i;
252 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
253 if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
254 (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
255 /* Make sure that anybody stopping the queue after this
256 * sees the new next_to_clean.
259 if (__netif_subqueue_stopped(tx_ring->netdev,
260 tx_ring->queue_index) &&
261 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
262 netif_wake_subqueue(tx_ring->netdev,
263 tx_ring->queue_index);
264 ++adapter->restart_queue;
268 u64_stats_update_begin(&tx_ring->syncp);
269 tx_ring->total_bytes += total_bytes;
270 tx_ring->total_packets += total_packets;
271 u64_stats_update_end(&tx_ring->syncp);
272 q_vector->tx.total_bytes += total_bytes;
273 q_vector->tx.total_packets += total_packets;
275 return count < tx_ring->count;
279 * ixgbevf_receive_skb - Send a completed packet up the stack
280 * @q_vector: structure containing interrupt and ring information
281 * @skb: packet to send up
282 * @status: hardware indication of status of receive
283 * @rx_desc: rx descriptor
285 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
286 struct sk_buff *skb, u8 status,
287 union ixgbe_adv_rx_desc *rx_desc)
289 struct ixgbevf_adapter *adapter = q_vector->adapter;
290 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
291 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
293 if (is_vlan && test_bit(tag & VLAN_VID_MASK, adapter->active_vlans))
294 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
296 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
297 napi_gro_receive(&q_vector->napi, skb);
303 * ixgbevf_rx_skb - Helper function to determine proper Rx method
304 * @q_vector: structure containing interrupt and ring information
305 * @skb: packet to send up
306 * @status: hardware indication of status of receive
307 * @rx_desc: rx descriptor
309 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
310 struct sk_buff *skb, u8 status,
311 union ixgbe_adv_rx_desc *rx_desc)
313 #ifdef CONFIG_NET_RX_BUSY_POLL
314 skb_mark_napi_id(skb, &q_vector->napi);
316 if (ixgbevf_qv_busy_polling(q_vector)) {
317 netif_receive_skb(skb);
318 /* exit early if we busy polled */
321 #endif /* CONFIG_NET_RX_BUSY_POLL */
323 ixgbevf_receive_skb(q_vector, skb, status, rx_desc);
327 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
328 * @ring: pointer to Rx descriptor ring structure
329 * @status_err: hardware indication of status of receive
330 * @skb: skb currently being received and modified
332 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
333 u32 status_err, struct sk_buff *skb)
335 skb_checksum_none_assert(skb);
337 /* Rx csum disabled */
338 if (!(ring->netdev->features & NETIF_F_RXCSUM))
341 /* if IP and error */
342 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
343 (status_err & IXGBE_RXDADV_ERR_IPE)) {
344 ring->hw_csum_rx_error++;
348 if (!(status_err & IXGBE_RXD_STAT_L4CS))
351 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
352 ring->hw_csum_rx_error++;
356 /* It must be a TCP or UDP packet with a valid checksum */
357 skb->ip_summed = CHECKSUM_UNNECESSARY;
358 ring->hw_csum_rx_good++;
362 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
363 * @adapter: address of board private structure
365 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
366 struct ixgbevf_ring *rx_ring,
369 struct pci_dev *pdev = adapter->pdev;
370 union ixgbe_adv_rx_desc *rx_desc;
371 struct ixgbevf_rx_buffer *bi;
372 unsigned int i = rx_ring->next_to_use;
374 bi = &rx_ring->rx_buffer_info[i];
376 while (cleaned_count--) {
377 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
382 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
383 rx_ring->rx_buf_len);
385 adapter->alloc_rx_buff_failed++;
390 bi->dma = dma_map_single(&pdev->dev, skb->data,
393 if (dma_mapping_error(&pdev->dev, bi->dma)) {
396 dev_err(&pdev->dev, "RX DMA map failed\n");
400 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
403 if (i == rx_ring->count)
405 bi = &rx_ring->rx_buffer_info[i];
409 if (rx_ring->next_to_use != i) {
410 rx_ring->next_to_use = i;
411 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
415 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
418 struct ixgbe_hw *hw = &adapter->hw;
420 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
423 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
424 struct ixgbevf_ring *rx_ring,
427 struct ixgbevf_adapter *adapter = q_vector->adapter;
428 struct pci_dev *pdev = adapter->pdev;
429 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
430 struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
434 int cleaned_count = 0;
435 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
437 i = rx_ring->next_to_clean;
438 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
439 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
440 rx_buffer_info = &rx_ring->rx_buffer_info[i];
442 while (staterr & IXGBE_RXD_STAT_DD) {
447 rmb(); /* read descriptor and rx_buffer_info after status DD */
448 len = le16_to_cpu(rx_desc->wb.upper.length);
449 skb = rx_buffer_info->skb;
450 prefetch(skb->data - NET_IP_ALIGN);
451 rx_buffer_info->skb = NULL;
453 if (rx_buffer_info->dma) {
454 dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
457 rx_buffer_info->dma = 0;
462 if (i == rx_ring->count)
465 next_rxd = IXGBEVF_RX_DESC(rx_ring, i);
469 next_buffer = &rx_ring->rx_buffer_info[i];
471 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
472 skb->next = next_buffer->skb;
473 IXGBE_CB(skb->next)->prev = skb;
474 adapter->non_eop_descs++;
478 /* we should not be chaining buffers, if we did drop the skb */
479 if (IXGBE_CB(skb)->prev) {
481 struct sk_buff *this = skb;
482 skb = IXGBE_CB(skb)->prev;
488 /* ERR_MASK will only have valid bits if EOP set */
489 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
490 dev_kfree_skb_irq(skb);
494 ixgbevf_rx_checksum(rx_ring, staterr, skb);
496 /* probably a little skewed due to removing CRC */
497 total_rx_bytes += skb->len;
500 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
502 /* Workaround hardware that can't do proper VEPA multicast
505 if ((skb->pkt_type & (PACKET_BROADCAST | PACKET_MULTICAST)) &&
506 ether_addr_equal(adapter->netdev->dev_addr,
507 eth_hdr(skb)->h_source)) {
508 dev_kfree_skb_irq(skb);
512 ixgbevf_rx_skb(q_vector, skb, staterr, rx_desc);
515 rx_desc->wb.upper.status_error = 0;
517 /* return some buffers to hardware, one at a time is too slow */
518 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
519 ixgbevf_alloc_rx_buffers(adapter, rx_ring,
524 /* use prefetched values */
526 rx_buffer_info = &rx_ring->rx_buffer_info[i];
528 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
531 rx_ring->next_to_clean = i;
532 cleaned_count = ixgbevf_desc_unused(rx_ring);
535 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
537 u64_stats_update_begin(&rx_ring->syncp);
538 rx_ring->total_packets += total_rx_packets;
539 rx_ring->total_bytes += total_rx_bytes;
540 u64_stats_update_end(&rx_ring->syncp);
541 q_vector->rx.total_packets += total_rx_packets;
542 q_vector->rx.total_bytes += total_rx_bytes;
544 return total_rx_packets;
548 * ixgbevf_poll - NAPI polling calback
549 * @napi: napi struct with our devices info in it
550 * @budget: amount of work driver is allowed to do this pass, in packets
552 * This function will clean more than one or more rings associated with a
555 static int ixgbevf_poll(struct napi_struct *napi, int budget)
557 struct ixgbevf_q_vector *q_vector =
558 container_of(napi, struct ixgbevf_q_vector, napi);
559 struct ixgbevf_adapter *adapter = q_vector->adapter;
560 struct ixgbevf_ring *ring;
562 bool clean_complete = true;
564 ixgbevf_for_each_ring(ring, q_vector->tx)
565 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
567 #ifdef CONFIG_NET_RX_BUSY_POLL
568 if (!ixgbevf_qv_lock_napi(q_vector))
572 /* attempt to distribute budget to each queue fairly, but don't allow
573 * the budget to go below 1 because we'll exit polling */
574 if (q_vector->rx.count > 1)
575 per_ring_budget = max(budget/q_vector->rx.count, 1);
577 per_ring_budget = budget;
579 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
580 ixgbevf_for_each_ring(ring, q_vector->rx)
581 clean_complete &= (ixgbevf_clean_rx_irq(q_vector, ring,
584 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
586 #ifdef CONFIG_NET_RX_BUSY_POLL
587 ixgbevf_qv_unlock_napi(q_vector);
590 /* If all work not completed, return budget and keep polling */
593 /* all work done, exit the polling mode */
595 if (adapter->rx_itr_setting & 1)
596 ixgbevf_set_itr(q_vector);
597 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
598 ixgbevf_irq_enable_queues(adapter,
599 1 << q_vector->v_idx);
605 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
606 * @q_vector: structure containing interrupt and ring information
608 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
610 struct ixgbevf_adapter *adapter = q_vector->adapter;
611 struct ixgbe_hw *hw = &adapter->hw;
612 int v_idx = q_vector->v_idx;
613 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
616 * set the WDIS bit to not clear the timer bits and cause an
617 * immediate assertion of the interrupt
619 itr_reg |= IXGBE_EITR_CNT_WDIS;
621 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
624 #ifdef CONFIG_NET_RX_BUSY_POLL
625 /* must be called with local_bh_disable()d */
626 static int ixgbevf_busy_poll_recv(struct napi_struct *napi)
628 struct ixgbevf_q_vector *q_vector =
629 container_of(napi, struct ixgbevf_q_vector, napi);
630 struct ixgbevf_adapter *adapter = q_vector->adapter;
631 struct ixgbevf_ring *ring;
634 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
635 return LL_FLUSH_FAILED;
637 if (!ixgbevf_qv_lock_poll(q_vector))
638 return LL_FLUSH_BUSY;
640 ixgbevf_for_each_ring(ring, q_vector->rx) {
641 found = ixgbevf_clean_rx_irq(q_vector, ring, 4);
642 #ifdef BP_EXTENDED_STATS
644 ring->bp_cleaned += found;
652 ixgbevf_qv_unlock_poll(q_vector);
656 #endif /* CONFIG_NET_RX_BUSY_POLL */
659 * ixgbevf_configure_msix - Configure MSI-X hardware
660 * @adapter: board private structure
662 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
665 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
667 struct ixgbevf_q_vector *q_vector;
668 int q_vectors, v_idx;
670 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
671 adapter->eims_enable_mask = 0;
674 * Populate the IVAR table and set the ITR values to the
675 * corresponding register.
677 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
678 struct ixgbevf_ring *ring;
679 q_vector = adapter->q_vector[v_idx];
681 ixgbevf_for_each_ring(ring, q_vector->rx)
682 ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
684 ixgbevf_for_each_ring(ring, q_vector->tx)
685 ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
687 if (q_vector->tx.ring && !q_vector->rx.ring) {
689 if (adapter->tx_itr_setting == 1)
690 q_vector->itr = IXGBE_10K_ITR;
692 q_vector->itr = adapter->tx_itr_setting;
694 /* rx or rx/tx vector */
695 if (adapter->rx_itr_setting == 1)
696 q_vector->itr = IXGBE_20K_ITR;
698 q_vector->itr = adapter->rx_itr_setting;
701 /* add q_vector eims value to global eims_enable_mask */
702 adapter->eims_enable_mask |= 1 << v_idx;
704 ixgbevf_write_eitr(q_vector);
707 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
708 /* setup eims_other and add value to global eims_enable_mask */
709 adapter->eims_other = 1 << v_idx;
710 adapter->eims_enable_mask |= adapter->eims_other;
717 latency_invalid = 255
721 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
722 * @q_vector: structure containing interrupt and ring information
723 * @ring_container: structure containing ring performance data
725 * Stores a new ITR value based on packets and byte
726 * counts during the last interrupt. The advantage of per interrupt
727 * computation is faster updates and more accurate ITR for the current
728 * traffic pattern. Constants in this function were computed
729 * based on theoretical maximum wire speed and thresholds were set based
730 * on testing data as well as attempting to minimize response time
731 * while increasing bulk throughput.
733 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
734 struct ixgbevf_ring_container *ring_container)
736 int bytes = ring_container->total_bytes;
737 int packets = ring_container->total_packets;
740 u8 itr_setting = ring_container->itr;
745 /* simple throttlerate management
746 * 0-20MB/s lowest (100000 ints/s)
747 * 20-100MB/s low (20000 ints/s)
748 * 100-1249MB/s bulk (8000 ints/s)
750 /* what was last interrupt timeslice? */
751 timepassed_us = q_vector->itr >> 2;
752 bytes_perint = bytes / timepassed_us; /* bytes/usec */
754 switch (itr_setting) {
756 if (bytes_perint > 10)
757 itr_setting = low_latency;
760 if (bytes_perint > 20)
761 itr_setting = bulk_latency;
762 else if (bytes_perint <= 10)
763 itr_setting = lowest_latency;
766 if (bytes_perint <= 20)
767 itr_setting = low_latency;
771 /* clear work counters since we have the values we need */
772 ring_container->total_bytes = 0;
773 ring_container->total_packets = 0;
775 /* write updated itr to ring container */
776 ring_container->itr = itr_setting;
779 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
781 u32 new_itr = q_vector->itr;
784 ixgbevf_update_itr(q_vector, &q_vector->tx);
785 ixgbevf_update_itr(q_vector, &q_vector->rx);
787 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
789 switch (current_itr) {
790 /* counts and packets in update_itr are dependent on these numbers */
792 new_itr = IXGBE_100K_ITR;
795 new_itr = IXGBE_20K_ITR;
799 new_itr = IXGBE_8K_ITR;
803 if (new_itr != q_vector->itr) {
804 /* do an exponential smoothing */
805 new_itr = (10 * new_itr * q_vector->itr) /
806 ((9 * new_itr) + q_vector->itr);
808 /* save the algorithm value here */
809 q_vector->itr = new_itr;
811 ixgbevf_write_eitr(q_vector);
815 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
817 struct ixgbevf_adapter *adapter = data;
818 struct ixgbe_hw *hw = &adapter->hw;
820 hw->mac.get_link_status = 1;
822 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
823 mod_timer(&adapter->watchdog_timer, jiffies);
825 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
831 * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
833 * @data: pointer to our q_vector struct for this interrupt vector
835 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
837 struct ixgbevf_q_vector *q_vector = data;
839 /* EIAM disabled interrupts (on this vector) for us */
840 if (q_vector->rx.ring || q_vector->tx.ring)
841 napi_schedule(&q_vector->napi);
846 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
849 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
851 a->rx_ring[r_idx].next = q_vector->rx.ring;
852 q_vector->rx.ring = &a->rx_ring[r_idx];
853 q_vector->rx.count++;
856 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
859 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
861 a->tx_ring[t_idx].next = q_vector->tx.ring;
862 q_vector->tx.ring = &a->tx_ring[t_idx];
863 q_vector->tx.count++;
867 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
868 * @adapter: board private structure to initialize
870 * This function maps descriptor rings to the queue-specific vectors
871 * we were allotted through the MSI-X enabling code. Ideally, we'd have
872 * one vector per ring/queue, but on a constrained vector budget, we
873 * group the rings as "efficiently" as possible. You would add new
874 * mapping configurations in here.
876 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
880 int rxr_idx = 0, txr_idx = 0;
881 int rxr_remaining = adapter->num_rx_queues;
882 int txr_remaining = adapter->num_tx_queues;
887 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
890 * The ideal configuration...
891 * We have enough vectors to map one per queue.
893 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
894 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
895 map_vector_to_rxq(adapter, v_start, rxr_idx);
897 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
898 map_vector_to_txq(adapter, v_start, txr_idx);
903 * If we don't have enough vectors for a 1-to-1
904 * mapping, we'll have to group them so there are
905 * multiple queues per vector.
907 /* Re-adjusting *qpv takes care of the remainder. */
908 for (i = v_start; i < q_vectors; i++) {
909 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
910 for (j = 0; j < rqpv; j++) {
911 map_vector_to_rxq(adapter, i, rxr_idx);
916 for (i = v_start; i < q_vectors; i++) {
917 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
918 for (j = 0; j < tqpv; j++) {
919 map_vector_to_txq(adapter, i, txr_idx);
930 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
931 * @adapter: board private structure
933 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
934 * interrupts from the kernel.
936 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
938 struct net_device *netdev = adapter->netdev;
939 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
943 for (vector = 0; vector < q_vectors; vector++) {
944 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
945 struct msix_entry *entry = &adapter->msix_entries[vector];
947 if (q_vector->tx.ring && q_vector->rx.ring) {
948 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
949 "%s-%s-%d", netdev->name, "TxRx", ri++);
951 } else if (q_vector->rx.ring) {
952 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
953 "%s-%s-%d", netdev->name, "rx", ri++);
954 } else if (q_vector->tx.ring) {
955 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
956 "%s-%s-%d", netdev->name, "tx", ti++);
958 /* skip this unused q_vector */
961 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
962 q_vector->name, q_vector);
965 "request_irq failed for MSIX interrupt "
967 goto free_queue_irqs;
971 err = request_irq(adapter->msix_entries[vector].vector,
972 &ixgbevf_msix_other, 0, netdev->name, adapter);
975 "request_irq for msix_other failed: %d\n", err);
976 goto free_queue_irqs;
984 free_irq(adapter->msix_entries[vector].vector,
985 adapter->q_vector[vector]);
987 /* This failure is non-recoverable - it indicates the system is
988 * out of MSIX vector resources and the VF driver cannot run
989 * without them. Set the number of msix vectors to zero
990 * indicating that not enough can be allocated. The error
991 * will be returned to the user indicating device open failed.
992 * Any further attempts to force the driver to open will also
993 * fail. The only way to recover is to unload the driver and
994 * reload it again. If the system has recovered some MSIX
995 * vectors then it may succeed.
997 adapter->num_msix_vectors = 0;
1001 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1003 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1005 for (i = 0; i < q_vectors; i++) {
1006 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1007 q_vector->rx.ring = NULL;
1008 q_vector->tx.ring = NULL;
1009 q_vector->rx.count = 0;
1010 q_vector->tx.count = 0;
1015 * ixgbevf_request_irq - initialize interrupts
1016 * @adapter: board private structure
1018 * Attempts to configure interrupts using the best available
1019 * capabilities of the hardware and kernel.
1021 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1025 err = ixgbevf_request_msix_irqs(adapter);
1028 hw_dbg(&adapter->hw,
1029 "request_irq failed, Error %d\n", err);
1034 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1038 q_vectors = adapter->num_msix_vectors;
1041 free_irq(adapter->msix_entries[i].vector, adapter);
1044 for (; i >= 0; i--) {
1045 /* free only the irqs that were actually requested */
1046 if (!adapter->q_vector[i]->rx.ring &&
1047 !adapter->q_vector[i]->tx.ring)
1050 free_irq(adapter->msix_entries[i].vector,
1051 adapter->q_vector[i]);
1054 ixgbevf_reset_q_vectors(adapter);
1058 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1059 * @adapter: board private structure
1061 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1063 struct ixgbe_hw *hw = &adapter->hw;
1066 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1067 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1068 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1070 IXGBE_WRITE_FLUSH(hw);
1072 for (i = 0; i < adapter->num_msix_vectors; i++)
1073 synchronize_irq(adapter->msix_entries[i].vector);
1077 * ixgbevf_irq_enable - Enable default interrupt generation settings
1078 * @adapter: board private structure
1080 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1082 struct ixgbe_hw *hw = &adapter->hw;
1084 IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1085 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1086 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1090 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1091 * @adapter: board private structure
1093 * Configure the Tx unit of the MAC after a reset.
1095 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1098 struct ixgbe_hw *hw = &adapter->hw;
1099 u32 i, j, tdlen, txctrl;
1101 /* Setup the HW Tx Head and Tail descriptor pointers */
1102 for (i = 0; i < adapter->num_tx_queues; i++) {
1103 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1106 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1107 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1108 (tdba & DMA_BIT_MASK(32)));
1109 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1110 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1111 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1112 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1113 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1114 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1115 /* Disable Tx Head Writeback RO bit, since this hoses
1116 * bookkeeping if things aren't delivered in order.
1118 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1119 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1120 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1124 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1126 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1128 struct ixgbevf_ring *rx_ring;
1129 struct ixgbe_hw *hw = &adapter->hw;
1132 rx_ring = &adapter->rx_ring[index];
1134 srrctl = IXGBE_SRRCTL_DROP_EN;
1136 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1138 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1139 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1141 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1144 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1146 struct ixgbe_hw *hw = &adapter->hw;
1148 /* PSRTYPE must be initialized in 82599 */
1149 u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1150 IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1151 IXGBE_PSRTYPE_L2HDR;
1153 if (adapter->num_rx_queues > 1)
1156 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1159 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter)
1161 struct ixgbe_hw *hw = &adapter->hw;
1162 struct net_device *netdev = adapter->netdev;
1163 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1167 /* notify the PF of our intent to use this size of frame */
1168 ixgbevf_rlpml_set_vf(hw, max_frame);
1170 /* PF will allow an extra 4 bytes past for vlan tagged frames */
1171 max_frame += VLAN_HLEN;
1174 * Allocate buffer sizes that fit well into 32K and
1175 * take into account max frame size of 9.5K
1177 if ((hw->mac.type == ixgbe_mac_X540_vf) &&
1178 (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE))
1179 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1180 else if (max_frame <= IXGBEVF_RXBUFFER_2K)
1181 rx_buf_len = IXGBEVF_RXBUFFER_2K;
1182 else if (max_frame <= IXGBEVF_RXBUFFER_4K)
1183 rx_buf_len = IXGBEVF_RXBUFFER_4K;
1184 else if (max_frame <= IXGBEVF_RXBUFFER_8K)
1185 rx_buf_len = IXGBEVF_RXBUFFER_8K;
1187 rx_buf_len = IXGBEVF_RXBUFFER_10K;
1189 for (i = 0; i < adapter->num_rx_queues; i++)
1190 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1194 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1195 * @adapter: board private structure
1197 * Configure the Rx unit of the MAC after a reset.
1199 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1202 struct ixgbe_hw *hw = &adapter->hw;
1206 ixgbevf_setup_psrtype(adapter);
1208 /* set_rx_buffer_len must be called before ring initialization */
1209 ixgbevf_set_rx_buffer_len(adapter);
1211 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1212 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1213 * the Base and Length of the Rx Descriptor Ring */
1214 for (i = 0; i < adapter->num_rx_queues; i++) {
1215 rdba = adapter->rx_ring[i].dma;
1216 j = adapter->rx_ring[i].reg_idx;
1217 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1218 (rdba & DMA_BIT_MASK(32)));
1219 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1220 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1221 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1222 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1223 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1224 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1226 ixgbevf_configure_srrctl(adapter, j);
1230 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1231 __be16 proto, u16 vid)
1233 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1234 struct ixgbe_hw *hw = &adapter->hw;
1237 spin_lock_bh(&adapter->mbx_lock);
1239 /* add VID to filter table */
1240 err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1242 spin_unlock_bh(&adapter->mbx_lock);
1244 /* translate error return types so error makes sense */
1245 if (err == IXGBE_ERR_MBX)
1248 if (err == IXGBE_ERR_INVALID_ARGUMENT)
1251 set_bit(vid, adapter->active_vlans);
1256 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1257 __be16 proto, u16 vid)
1259 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1260 struct ixgbe_hw *hw = &adapter->hw;
1261 int err = -EOPNOTSUPP;
1263 spin_lock_bh(&adapter->mbx_lock);
1265 /* remove VID from filter table */
1266 err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1268 spin_unlock_bh(&adapter->mbx_lock);
1270 clear_bit(vid, adapter->active_vlans);
1275 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1279 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1280 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1281 htons(ETH_P_8021Q), vid);
1284 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1286 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1287 struct ixgbe_hw *hw = &adapter->hw;
1290 if ((netdev_uc_count(netdev)) > 10) {
1291 pr_err("Too many unicast filters - No Space\n");
1295 if (!netdev_uc_empty(netdev)) {
1296 struct netdev_hw_addr *ha;
1297 netdev_for_each_uc_addr(ha, netdev) {
1298 hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1303 * If the list is empty then send message to PF driver to
1304 * clear all macvlans on this VF.
1306 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1313 * ixgbevf_set_rx_mode - Multicast and unicast set
1314 * @netdev: network interface device structure
1316 * The set_rx_method entry point is called whenever the multicast address
1317 * list, unicast address list or the network interface flags are updated.
1318 * This routine is responsible for configuring the hardware for proper
1319 * multicast mode and configuring requested unicast filters.
1321 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1323 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1324 struct ixgbe_hw *hw = &adapter->hw;
1326 spin_lock_bh(&adapter->mbx_lock);
1328 /* reprogram multicast list */
1329 hw->mac.ops.update_mc_addr_list(hw, netdev);
1331 ixgbevf_write_uc_addr_list(netdev);
1333 spin_unlock_bh(&adapter->mbx_lock);
1336 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1339 struct ixgbevf_q_vector *q_vector;
1340 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1342 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1343 q_vector = adapter->q_vector[q_idx];
1344 #ifdef CONFIG_NET_RX_BUSY_POLL
1345 ixgbevf_qv_init_lock(adapter->q_vector[q_idx]);
1347 napi_enable(&q_vector->napi);
1351 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1354 struct ixgbevf_q_vector *q_vector;
1355 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1357 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1358 q_vector = adapter->q_vector[q_idx];
1359 napi_disable(&q_vector->napi);
1360 #ifdef CONFIG_NET_RX_BUSY_POLL
1361 while (!ixgbevf_qv_disable(adapter->q_vector[q_idx])) {
1362 pr_info("QV %d locked\n", q_idx);
1363 usleep_range(1000, 20000);
1365 #endif /* CONFIG_NET_RX_BUSY_POLL */
1369 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1371 struct net_device *netdev = adapter->netdev;
1374 ixgbevf_set_rx_mode(netdev);
1376 ixgbevf_restore_vlan(adapter);
1378 ixgbevf_configure_tx(adapter);
1379 ixgbevf_configure_rx(adapter);
1380 for (i = 0; i < adapter->num_rx_queues; i++) {
1381 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1382 ixgbevf_alloc_rx_buffers(adapter, ring,
1383 ixgbevf_desc_unused(ring));
1387 #define IXGBEVF_MAX_RX_DESC_POLL 10
1388 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1391 struct ixgbe_hw *hw = &adapter->hw;
1392 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1394 int j = adapter->rx_ring[rxr].reg_idx;
1397 usleep_range(1000, 2000);
1398 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1399 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1402 hw_dbg(hw, "RXDCTL.ENABLE queue %d not set while polling\n",
1405 ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1406 (adapter->rx_ring[rxr].count - 1));
1409 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1410 struct ixgbevf_ring *ring)
1412 struct ixgbe_hw *hw = &adapter->hw;
1413 int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1415 u8 reg_idx = ring->reg_idx;
1417 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1418 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1420 /* write value back with RXDCTL.ENABLE bit cleared */
1421 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1423 /* the hardware may take up to 100us to really disable the rx queue */
1426 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1427 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1430 hw_dbg(hw, "RXDCTL.ENABLE queue %d not cleared while polling\n",
1434 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1436 /* Only save pre-reset stats if there are some */
1437 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1438 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1439 adapter->stats.base_vfgprc;
1440 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1441 adapter->stats.base_vfgptc;
1442 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1443 adapter->stats.base_vfgorc;
1444 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1445 adapter->stats.base_vfgotc;
1446 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1447 adapter->stats.base_vfmprc;
1451 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1453 struct ixgbe_hw *hw = &adapter->hw;
1455 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1456 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1457 adapter->stats.last_vfgorc |=
1458 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1459 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1460 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1461 adapter->stats.last_vfgotc |=
1462 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1463 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1465 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1466 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1467 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1468 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1469 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1472 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
1474 struct ixgbe_hw *hw = &adapter->hw;
1475 int api[] = { ixgbe_mbox_api_11,
1477 ixgbe_mbox_api_unknown };
1478 int err = 0, idx = 0;
1480 spin_lock_bh(&adapter->mbx_lock);
1482 while (api[idx] != ixgbe_mbox_api_unknown) {
1483 err = ixgbevf_negotiate_api_version(hw, api[idx]);
1489 spin_unlock_bh(&adapter->mbx_lock);
1492 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1494 struct net_device *netdev = adapter->netdev;
1495 struct ixgbe_hw *hw = &adapter->hw;
1497 int num_rx_rings = adapter->num_rx_queues;
1500 for (i = 0; i < adapter->num_tx_queues; i++) {
1501 j = adapter->tx_ring[i].reg_idx;
1502 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1503 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1504 txdctl |= (8 << 16);
1505 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1508 for (i = 0; i < adapter->num_tx_queues; i++) {
1509 j = adapter->tx_ring[i].reg_idx;
1510 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1511 txdctl |= IXGBE_TXDCTL_ENABLE;
1512 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1515 for (i = 0; i < num_rx_rings; i++) {
1516 j = adapter->rx_ring[i].reg_idx;
1517 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1518 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1519 if (hw->mac.type == ixgbe_mac_X540_vf) {
1520 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1521 rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) |
1522 IXGBE_RXDCTL_RLPML_EN);
1524 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1525 ixgbevf_rx_desc_queue_enable(adapter, i);
1528 ixgbevf_configure_msix(adapter);
1530 spin_lock_bh(&adapter->mbx_lock);
1532 if (is_valid_ether_addr(hw->mac.addr))
1533 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1535 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1537 spin_unlock_bh(&adapter->mbx_lock);
1539 clear_bit(__IXGBEVF_DOWN, &adapter->state);
1540 ixgbevf_napi_enable_all(adapter);
1542 /* enable transmits */
1543 netif_tx_start_all_queues(netdev);
1545 ixgbevf_save_reset_stats(adapter);
1546 ixgbevf_init_last_counter_stats(adapter);
1548 hw->mac.get_link_status = 1;
1549 mod_timer(&adapter->watchdog_timer, jiffies);
1552 static int ixgbevf_reset_queues(struct ixgbevf_adapter *adapter)
1554 struct ixgbe_hw *hw = &adapter->hw;
1555 struct ixgbevf_ring *rx_ring;
1556 unsigned int def_q = 0;
1557 unsigned int num_tcs = 0;
1558 unsigned int num_rx_queues = 1;
1561 spin_lock_bh(&adapter->mbx_lock);
1563 /* fetch queue configuration from the PF */
1564 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1566 spin_unlock_bh(&adapter->mbx_lock);
1572 /* update default Tx ring register index */
1573 adapter->tx_ring[0].reg_idx = def_q;
1575 /* we need as many queues as traffic classes */
1576 num_rx_queues = num_tcs;
1579 /* nothing to do if we have the correct number of queues */
1580 if (adapter->num_rx_queues == num_rx_queues)
1583 /* allocate new rings */
1584 rx_ring = kcalloc(num_rx_queues,
1585 sizeof(struct ixgbevf_ring), GFP_KERNEL);
1589 /* setup ring fields */
1590 for (i = 0; i < num_rx_queues; i++) {
1591 rx_ring[i].count = adapter->rx_ring_count;
1592 rx_ring[i].queue_index = i;
1593 rx_ring[i].reg_idx = i;
1594 rx_ring[i].dev = &adapter->pdev->dev;
1595 rx_ring[i].netdev = adapter->netdev;
1597 /* allocate resources on the ring */
1598 err = ixgbevf_setup_rx_resources(adapter, &rx_ring[i]);
1602 ixgbevf_free_rx_resources(adapter, &rx_ring[i]);
1609 /* free the existing rings and queues */
1610 ixgbevf_free_all_rx_resources(adapter);
1611 adapter->num_rx_queues = 0;
1612 kfree(adapter->rx_ring);
1614 /* move new rings into position on the adapter struct */
1615 adapter->rx_ring = rx_ring;
1616 adapter->num_rx_queues = num_rx_queues;
1618 /* reset ring to vector mapping */
1619 ixgbevf_reset_q_vectors(adapter);
1620 ixgbevf_map_rings_to_vectors(adapter);
1625 void ixgbevf_up(struct ixgbevf_adapter *adapter)
1627 struct ixgbe_hw *hw = &adapter->hw;
1629 ixgbevf_reset_queues(adapter);
1631 ixgbevf_configure(adapter);
1633 ixgbevf_up_complete(adapter);
1635 /* clear any pending interrupts, may auto mask */
1636 IXGBE_READ_REG(hw, IXGBE_VTEICR);
1638 ixgbevf_irq_enable(adapter);
1642 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1643 * @adapter: board private structure
1644 * @rx_ring: ring to free buffers from
1646 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1647 struct ixgbevf_ring *rx_ring)
1649 struct pci_dev *pdev = adapter->pdev;
1653 if (!rx_ring->rx_buffer_info)
1656 /* Free all the Rx ring sk_buffs */
1657 for (i = 0; i < rx_ring->count; i++) {
1658 struct ixgbevf_rx_buffer *rx_buffer_info;
1660 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1661 if (rx_buffer_info->dma) {
1662 dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
1663 rx_ring->rx_buf_len,
1665 rx_buffer_info->dma = 0;
1667 if (rx_buffer_info->skb) {
1668 struct sk_buff *skb = rx_buffer_info->skb;
1669 rx_buffer_info->skb = NULL;
1671 struct sk_buff *this = skb;
1672 skb = IXGBE_CB(skb)->prev;
1673 dev_kfree_skb(this);
1678 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1679 memset(rx_ring->rx_buffer_info, 0, size);
1681 /* Zero out the descriptor ring */
1682 memset(rx_ring->desc, 0, rx_ring->size);
1684 rx_ring->next_to_clean = 0;
1685 rx_ring->next_to_use = 0;
1688 writel(0, adapter->hw.hw_addr + rx_ring->head);
1690 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1694 * ixgbevf_clean_tx_ring - Free Tx Buffers
1695 * @adapter: board private structure
1696 * @tx_ring: ring to be cleaned
1698 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1699 struct ixgbevf_ring *tx_ring)
1701 struct ixgbevf_tx_buffer *tx_buffer_info;
1705 if (!tx_ring->tx_buffer_info)
1708 /* Free all the Tx ring sk_buffs */
1709 for (i = 0; i < tx_ring->count; i++) {
1710 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1711 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
1714 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1715 memset(tx_ring->tx_buffer_info, 0, size);
1717 memset(tx_ring->desc, 0, tx_ring->size);
1719 tx_ring->next_to_use = 0;
1720 tx_ring->next_to_clean = 0;
1723 writel(0, adapter->hw.hw_addr + tx_ring->head);
1725 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1729 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1730 * @adapter: board private structure
1732 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1736 for (i = 0; i < adapter->num_rx_queues; i++)
1737 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1741 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1742 * @adapter: board private structure
1744 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1748 for (i = 0; i < adapter->num_tx_queues; i++)
1749 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1752 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1754 struct net_device *netdev = adapter->netdev;
1755 struct ixgbe_hw *hw = &adapter->hw;
1759 /* signal that we are down to the interrupt handler */
1760 set_bit(__IXGBEVF_DOWN, &adapter->state);
1762 /* disable all enabled rx queues */
1763 for (i = 0; i < adapter->num_rx_queues; i++)
1764 ixgbevf_disable_rx_queue(adapter, &adapter->rx_ring[i]);
1766 netif_tx_disable(netdev);
1770 netif_tx_stop_all_queues(netdev);
1772 ixgbevf_irq_disable(adapter);
1774 ixgbevf_napi_disable_all(adapter);
1776 del_timer_sync(&adapter->watchdog_timer);
1777 /* can't call flush scheduled work here because it can deadlock
1778 * if linkwatch_event tries to acquire the rtnl_lock which we are
1780 while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1783 /* disable transmits in the hardware now that interrupts are off */
1784 for (i = 0; i < adapter->num_tx_queues; i++) {
1785 j = adapter->tx_ring[i].reg_idx;
1786 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1787 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1788 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1791 netif_carrier_off(netdev);
1793 if (!pci_channel_offline(adapter->pdev))
1794 ixgbevf_reset(adapter);
1796 ixgbevf_clean_all_tx_rings(adapter);
1797 ixgbevf_clean_all_rx_rings(adapter);
1800 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1802 WARN_ON(in_interrupt());
1804 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1807 ixgbevf_down(adapter);
1808 ixgbevf_up(adapter);
1810 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1813 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1815 struct ixgbe_hw *hw = &adapter->hw;
1816 struct net_device *netdev = adapter->netdev;
1818 if (hw->mac.ops.reset_hw(hw)) {
1819 hw_dbg(hw, "PF still resetting\n");
1821 hw->mac.ops.init_hw(hw);
1822 ixgbevf_negotiate_api(adapter);
1825 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1826 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1828 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1833 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1837 int vector_threshold;
1839 /* We'll want at least 2 (vector_threshold):
1840 * 1) TxQ[0] + RxQ[0] handler
1841 * 2) Other (Link Status Change, etc.)
1843 vector_threshold = MIN_MSIX_COUNT;
1845 /* The more we get, the more we will assign to Tx/Rx Cleanup
1846 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1847 * Right now, we simply care about how many we'll get; we'll
1848 * set them up later while requesting irq's.
1850 while (vectors >= vector_threshold) {
1851 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1853 if (!err || err < 0) /* Success or a nasty failure. */
1855 else /* err == number of vectors we should try again with */
1859 if (vectors < vector_threshold)
1863 dev_err(&adapter->pdev->dev,
1864 "Unable to allocate MSI-X interrupts\n");
1865 kfree(adapter->msix_entries);
1866 adapter->msix_entries = NULL;
1869 * Adjust for only the vectors we'll use, which is minimum
1870 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1871 * vectors we were allocated.
1873 adapter->num_msix_vectors = vectors;
1880 * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
1881 * @adapter: board private structure to initialize
1883 * This is the top level queue allocation routine. The order here is very
1884 * important, starting with the "most" number of features turned on at once,
1885 * and ending with the smallest set of features. This way large combinations
1886 * can be allocated if they're turned on, and smaller combinations are the
1887 * fallthrough conditions.
1890 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1892 /* Start with base case */
1893 adapter->num_rx_queues = 1;
1894 adapter->num_tx_queues = 1;
1898 * ixgbevf_alloc_queues - Allocate memory for all rings
1899 * @adapter: board private structure to initialize
1901 * We allocate one ring per queue at run-time since we don't know the
1902 * number of queues at compile-time. The polling_netdev array is
1903 * intended for Multiqueue, but should work fine with a single queue.
1905 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1909 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1910 sizeof(struct ixgbevf_ring), GFP_KERNEL);
1911 if (!adapter->tx_ring)
1912 goto err_tx_ring_allocation;
1914 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1915 sizeof(struct ixgbevf_ring), GFP_KERNEL);
1916 if (!adapter->rx_ring)
1917 goto err_rx_ring_allocation;
1919 for (i = 0; i < adapter->num_tx_queues; i++) {
1920 adapter->tx_ring[i].count = adapter->tx_ring_count;
1921 adapter->tx_ring[i].queue_index = i;
1922 /* reg_idx may be remapped later by DCB config */
1923 adapter->tx_ring[i].reg_idx = i;
1924 adapter->tx_ring[i].dev = &adapter->pdev->dev;
1925 adapter->tx_ring[i].netdev = adapter->netdev;
1928 for (i = 0; i < adapter->num_rx_queues; i++) {
1929 adapter->rx_ring[i].count = adapter->rx_ring_count;
1930 adapter->rx_ring[i].queue_index = i;
1931 adapter->rx_ring[i].reg_idx = i;
1932 adapter->rx_ring[i].dev = &adapter->pdev->dev;
1933 adapter->rx_ring[i].netdev = adapter->netdev;
1938 err_rx_ring_allocation:
1939 kfree(adapter->tx_ring);
1940 err_tx_ring_allocation:
1945 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1946 * @adapter: board private structure to initialize
1948 * Attempt to configure the interrupts using the best available
1949 * capabilities of the hardware and the kernel.
1951 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1953 struct net_device *netdev = adapter->netdev;
1955 int vector, v_budget;
1958 * It's easy to be greedy for MSI-X vectors, but it really
1959 * doesn't do us much good if we have a lot more vectors
1960 * than CPU's. So let's be conservative and only ask for
1961 * (roughly) the same number of vectors as there are CPU's.
1962 * The default is to use pairs of vectors.
1964 v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
1965 v_budget = min_t(int, v_budget, num_online_cpus());
1966 v_budget += NON_Q_VECTORS;
1968 /* A failure in MSI-X entry allocation isn't fatal, but it does
1969 * mean we disable MSI-X capabilities of the adapter. */
1970 adapter->msix_entries = kcalloc(v_budget,
1971 sizeof(struct msix_entry), GFP_KERNEL);
1972 if (!adapter->msix_entries) {
1977 for (vector = 0; vector < v_budget; vector++)
1978 adapter->msix_entries[vector].entry = vector;
1980 err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
1984 err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
1988 err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
1995 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
1996 * @adapter: board private structure to initialize
1998 * We allocate one q_vector per queue interrupt. If allocation fails we
2001 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2003 int q_idx, num_q_vectors;
2004 struct ixgbevf_q_vector *q_vector;
2006 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2008 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2009 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2012 q_vector->adapter = adapter;
2013 q_vector->v_idx = q_idx;
2014 netif_napi_add(adapter->netdev, &q_vector->napi,
2016 #ifdef CONFIG_NET_RX_BUSY_POLL
2017 napi_hash_add(&q_vector->napi);
2019 adapter->q_vector[q_idx] = q_vector;
2027 q_vector = adapter->q_vector[q_idx];
2028 #ifdef CONFIG_NET_RX_BUSY_POLL
2029 napi_hash_del(&q_vector->napi);
2031 netif_napi_del(&q_vector->napi);
2033 adapter->q_vector[q_idx] = NULL;
2039 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2040 * @adapter: board private structure to initialize
2042 * This function frees the memory allocated to the q_vectors. In addition if
2043 * NAPI is enabled it will delete any references to the NAPI struct prior
2044 * to freeing the q_vector.
2046 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2048 int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2050 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2051 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2053 adapter->q_vector[q_idx] = NULL;
2054 #ifdef CONFIG_NET_RX_BUSY_POLL
2055 napi_hash_del(&q_vector->napi);
2057 netif_napi_del(&q_vector->napi);
2063 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2064 * @adapter: board private structure
2067 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2069 pci_disable_msix(adapter->pdev);
2070 kfree(adapter->msix_entries);
2071 adapter->msix_entries = NULL;
2075 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2076 * @adapter: board private structure to initialize
2079 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2083 /* Number of supported queues */
2084 ixgbevf_set_num_queues(adapter);
2086 err = ixgbevf_set_interrupt_capability(adapter);
2088 hw_dbg(&adapter->hw,
2089 "Unable to setup interrupt capabilities\n");
2090 goto err_set_interrupt;
2093 err = ixgbevf_alloc_q_vectors(adapter);
2095 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2097 goto err_alloc_q_vectors;
2100 err = ixgbevf_alloc_queues(adapter);
2102 pr_err("Unable to allocate memory for queues\n");
2103 goto err_alloc_queues;
2106 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2107 "Tx Queue count = %u\n",
2108 (adapter->num_rx_queues > 1) ? "Enabled" :
2109 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2111 set_bit(__IXGBEVF_DOWN, &adapter->state);
2115 ixgbevf_free_q_vectors(adapter);
2116 err_alloc_q_vectors:
2117 ixgbevf_reset_interrupt_capability(adapter);
2123 * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2124 * @adapter: board private structure to clear interrupt scheme on
2126 * We go through and clear interrupt specific resources and reset the structure
2127 * to pre-load conditions
2129 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2131 adapter->num_tx_queues = 0;
2132 adapter->num_rx_queues = 0;
2134 ixgbevf_free_q_vectors(adapter);
2135 ixgbevf_reset_interrupt_capability(adapter);
2139 * ixgbevf_sw_init - Initialize general software structures
2140 * (struct ixgbevf_adapter)
2141 * @adapter: board private structure to initialize
2143 * ixgbevf_sw_init initializes the Adapter private data structure.
2144 * Fields are initialized based on PCI device information and
2145 * OS network device settings (MTU size).
2147 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2149 struct ixgbe_hw *hw = &adapter->hw;
2150 struct pci_dev *pdev = adapter->pdev;
2151 struct net_device *netdev = adapter->netdev;
2154 /* PCI config space info */
2156 hw->vendor_id = pdev->vendor;
2157 hw->device_id = pdev->device;
2158 hw->revision_id = pdev->revision;
2159 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2160 hw->subsystem_device_id = pdev->subsystem_device;
2162 hw->mbx.ops.init_params(hw);
2164 /* assume legacy case in which PF would only give VF 2 queues */
2165 hw->mac.max_tx_queues = 2;
2166 hw->mac.max_rx_queues = 2;
2168 /* lock to protect mailbox accesses */
2169 spin_lock_init(&adapter->mbx_lock);
2171 err = hw->mac.ops.reset_hw(hw);
2173 dev_info(&pdev->dev,
2174 "PF still in reset state. Is the PF interface up?\n");
2176 err = hw->mac.ops.init_hw(hw);
2178 pr_err("init_shared_code failed: %d\n", err);
2181 ixgbevf_negotiate_api(adapter);
2182 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2184 dev_info(&pdev->dev, "Error reading MAC address\n");
2185 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2186 dev_info(&pdev->dev,
2187 "MAC address not assigned by administrator.\n");
2188 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
2191 if (!is_valid_ether_addr(netdev->dev_addr)) {
2192 dev_info(&pdev->dev, "Assigning random MAC address\n");
2193 eth_hw_addr_random(netdev);
2194 memcpy(hw->mac.addr, netdev->dev_addr, netdev->addr_len);
2197 /* Enable dynamic interrupt throttling rates */
2198 adapter->rx_itr_setting = 1;
2199 adapter->tx_itr_setting = 1;
2201 /* set default ring sizes */
2202 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2203 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2205 set_bit(__IXGBEVF_DOWN, &adapter->state);
2212 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2214 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2215 if (current_counter < last_counter) \
2216 counter += 0x100000000LL; \
2217 last_counter = current_counter; \
2218 counter &= 0xFFFFFFFF00000000LL; \
2219 counter |= current_counter; \
2222 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2224 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2225 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2226 u64 current_counter = (current_counter_msb << 32) | \
2227 current_counter_lsb; \
2228 if (current_counter < last_counter) \
2229 counter += 0x1000000000LL; \
2230 last_counter = current_counter; \
2231 counter &= 0xFFFFFFF000000000LL; \
2232 counter |= current_counter; \
2235 * ixgbevf_update_stats - Update the board statistics counters.
2236 * @adapter: board private structure
2238 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2240 struct ixgbe_hw *hw = &adapter->hw;
2243 if (!adapter->link_up)
2246 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2247 adapter->stats.vfgprc);
2248 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2249 adapter->stats.vfgptc);
2250 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2251 adapter->stats.last_vfgorc,
2252 adapter->stats.vfgorc);
2253 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2254 adapter->stats.last_vfgotc,
2255 adapter->stats.vfgotc);
2256 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2257 adapter->stats.vfmprc);
2259 for (i = 0; i < adapter->num_rx_queues; i++) {
2260 adapter->hw_csum_rx_error +=
2261 adapter->rx_ring[i].hw_csum_rx_error;
2262 adapter->hw_csum_rx_good +=
2263 adapter->rx_ring[i].hw_csum_rx_good;
2264 adapter->rx_ring[i].hw_csum_rx_error = 0;
2265 adapter->rx_ring[i].hw_csum_rx_good = 0;
2270 * ixgbevf_watchdog - Timer Call-back
2271 * @data: pointer to adapter cast into an unsigned long
2273 static void ixgbevf_watchdog(unsigned long data)
2275 struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2276 struct ixgbe_hw *hw = &adapter->hw;
2281 * Do the watchdog outside of interrupt context due to the lovely
2282 * delays that some of the newer hardware requires
2285 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2286 goto watchdog_short_circuit;
2288 /* get one bit for every active tx/rx interrupt vector */
2289 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2290 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2291 if (qv->rx.ring || qv->tx.ring)
2295 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2297 watchdog_short_circuit:
2298 schedule_work(&adapter->watchdog_task);
2302 * ixgbevf_tx_timeout - Respond to a Tx Hang
2303 * @netdev: network interface device structure
2305 static void ixgbevf_tx_timeout(struct net_device *netdev)
2307 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2309 /* Do the reset outside of interrupt context */
2310 schedule_work(&adapter->reset_task);
2313 static void ixgbevf_reset_task(struct work_struct *work)
2315 struct ixgbevf_adapter *adapter;
2316 adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2318 /* If we're already down or resetting, just bail */
2319 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2320 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2323 adapter->tx_timeout_count++;
2325 ixgbevf_reinit_locked(adapter);
2329 * ixgbevf_watchdog_task - worker thread to bring link up
2330 * @work: pointer to work_struct containing our data
2332 static void ixgbevf_watchdog_task(struct work_struct *work)
2334 struct ixgbevf_adapter *adapter = container_of(work,
2335 struct ixgbevf_adapter,
2337 struct net_device *netdev = adapter->netdev;
2338 struct ixgbe_hw *hw = &adapter->hw;
2339 u32 link_speed = adapter->link_speed;
2340 bool link_up = adapter->link_up;
2343 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2346 * Always check the link on the watchdog because we have
2349 spin_lock_bh(&adapter->mbx_lock);
2351 need_reset = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2353 spin_unlock_bh(&adapter->mbx_lock);
2356 adapter->link_up = link_up;
2357 adapter->link_speed = link_speed;
2358 netif_carrier_off(netdev);
2359 netif_tx_stop_all_queues(netdev);
2360 schedule_work(&adapter->reset_task);
2363 adapter->link_up = link_up;
2364 adapter->link_speed = link_speed;
2367 if (!netif_carrier_ok(netdev)) {
2368 char *link_speed_string;
2369 switch (link_speed) {
2370 case IXGBE_LINK_SPEED_10GB_FULL:
2371 link_speed_string = "10 Gbps";
2373 case IXGBE_LINK_SPEED_1GB_FULL:
2374 link_speed_string = "1 Gbps";
2376 case IXGBE_LINK_SPEED_100_FULL:
2377 link_speed_string = "100 Mbps";
2380 link_speed_string = "unknown speed";
2383 dev_info(&adapter->pdev->dev,
2384 "NIC Link is Up, %s\n", link_speed_string);
2385 netif_carrier_on(netdev);
2386 netif_tx_wake_all_queues(netdev);
2389 adapter->link_up = false;
2390 adapter->link_speed = 0;
2391 if (netif_carrier_ok(netdev)) {
2392 dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2393 netif_carrier_off(netdev);
2394 netif_tx_stop_all_queues(netdev);
2398 ixgbevf_update_stats(adapter);
2401 /* Reset the timer */
2402 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2403 mod_timer(&adapter->watchdog_timer,
2404 round_jiffies(jiffies + (2 * HZ)));
2406 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2410 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2411 * @adapter: board private structure
2412 * @tx_ring: Tx descriptor ring for a specific queue
2414 * Free all transmit software resources
2416 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2417 struct ixgbevf_ring *tx_ring)
2419 struct pci_dev *pdev = adapter->pdev;
2421 ixgbevf_clean_tx_ring(adapter, tx_ring);
2423 vfree(tx_ring->tx_buffer_info);
2424 tx_ring->tx_buffer_info = NULL;
2426 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2429 tx_ring->desc = NULL;
2433 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2434 * @adapter: board private structure
2436 * Free all transmit software resources
2438 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2442 for (i = 0; i < adapter->num_tx_queues; i++)
2443 if (adapter->tx_ring[i].desc)
2444 ixgbevf_free_tx_resources(adapter,
2445 &adapter->tx_ring[i]);
2450 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2451 * @adapter: board private structure
2452 * @tx_ring: tx descriptor ring (for a specific queue) to setup
2454 * Return 0 on success, negative on failure
2456 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2457 struct ixgbevf_ring *tx_ring)
2459 struct pci_dev *pdev = adapter->pdev;
2462 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2463 tx_ring->tx_buffer_info = vzalloc(size);
2464 if (!tx_ring->tx_buffer_info)
2467 /* round up to nearest 4K */
2468 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2469 tx_ring->size = ALIGN(tx_ring->size, 4096);
2471 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
2472 &tx_ring->dma, GFP_KERNEL);
2476 tx_ring->next_to_use = 0;
2477 tx_ring->next_to_clean = 0;
2481 vfree(tx_ring->tx_buffer_info);
2482 tx_ring->tx_buffer_info = NULL;
2483 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2484 "descriptor ring\n");
2489 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2490 * @adapter: board private structure
2492 * If this function returns with an error, then it's possible one or
2493 * more of the rings is populated (while the rest are not). It is the
2494 * callers duty to clean those orphaned rings.
2496 * Return 0 on success, negative on failure
2498 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2502 for (i = 0; i < adapter->num_tx_queues; i++) {
2503 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2506 hw_dbg(&adapter->hw,
2507 "Allocation for Tx Queue %u failed\n", i);
2515 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2516 * @adapter: board private structure
2517 * @rx_ring: rx descriptor ring (for a specific queue) to setup
2519 * Returns 0 on success, negative on failure
2521 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2522 struct ixgbevf_ring *rx_ring)
2524 struct pci_dev *pdev = adapter->pdev;
2527 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2528 rx_ring->rx_buffer_info = vzalloc(size);
2529 if (!rx_ring->rx_buffer_info)
2532 /* Round up to nearest 4K */
2533 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2534 rx_ring->size = ALIGN(rx_ring->size, 4096);
2536 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
2537 &rx_ring->dma, GFP_KERNEL);
2539 if (!rx_ring->desc) {
2540 vfree(rx_ring->rx_buffer_info);
2541 rx_ring->rx_buffer_info = NULL;
2545 rx_ring->next_to_clean = 0;
2546 rx_ring->next_to_use = 0;
2554 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2555 * @adapter: board private structure
2557 * If this function returns with an error, then it's possible one or
2558 * more of the rings is populated (while the rest are not). It is the
2559 * callers duty to clean those orphaned rings.
2561 * Return 0 on success, negative on failure
2563 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2567 for (i = 0; i < adapter->num_rx_queues; i++) {
2568 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2571 hw_dbg(&adapter->hw,
2572 "Allocation for Rx Queue %u failed\n", i);
2579 * ixgbevf_free_rx_resources - Free Rx Resources
2580 * @adapter: board private structure
2581 * @rx_ring: ring to clean the resources from
2583 * Free all receive software resources
2585 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2586 struct ixgbevf_ring *rx_ring)
2588 struct pci_dev *pdev = adapter->pdev;
2590 ixgbevf_clean_rx_ring(adapter, rx_ring);
2592 vfree(rx_ring->rx_buffer_info);
2593 rx_ring->rx_buffer_info = NULL;
2595 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2598 rx_ring->desc = NULL;
2602 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2603 * @adapter: board private structure
2605 * Free all receive software resources
2607 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2611 for (i = 0; i < adapter->num_rx_queues; i++)
2612 if (adapter->rx_ring[i].desc)
2613 ixgbevf_free_rx_resources(adapter,
2614 &adapter->rx_ring[i]);
2617 static int ixgbevf_setup_queues(struct ixgbevf_adapter *adapter)
2619 struct ixgbe_hw *hw = &adapter->hw;
2620 struct ixgbevf_ring *rx_ring;
2621 unsigned int def_q = 0;
2622 unsigned int num_tcs = 0;
2623 unsigned int num_rx_queues = 1;
2626 spin_lock_bh(&adapter->mbx_lock);
2628 /* fetch queue configuration from the PF */
2629 err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2631 spin_unlock_bh(&adapter->mbx_lock);
2637 /* update default Tx ring register index */
2638 adapter->tx_ring[0].reg_idx = def_q;
2640 /* we need as many queues as traffic classes */
2641 num_rx_queues = num_tcs;
2644 /* nothing to do if we have the correct number of queues */
2645 if (adapter->num_rx_queues == num_rx_queues)
2648 /* allocate new rings */
2649 rx_ring = kcalloc(num_rx_queues,
2650 sizeof(struct ixgbevf_ring), GFP_KERNEL);
2654 /* setup ring fields */
2655 for (i = 0; i < num_rx_queues; i++) {
2656 rx_ring[i].count = adapter->rx_ring_count;
2657 rx_ring[i].queue_index = i;
2658 rx_ring[i].reg_idx = i;
2659 rx_ring[i].dev = &adapter->pdev->dev;
2660 rx_ring[i].netdev = adapter->netdev;
2663 /* free the existing ring and queues */
2664 adapter->num_rx_queues = 0;
2665 kfree(adapter->rx_ring);
2667 /* move new rings into position on the adapter struct */
2668 adapter->rx_ring = rx_ring;
2669 adapter->num_rx_queues = num_rx_queues;
2675 * ixgbevf_open - Called when a network interface is made active
2676 * @netdev: network interface device structure
2678 * Returns 0 on success, negative value on failure
2680 * The open entry point is called when a network interface is made
2681 * active by the system (IFF_UP). At this point all resources needed
2682 * for transmit and receive operations are allocated, the interrupt
2683 * handler is registered with the OS, the watchdog timer is started,
2684 * and the stack is notified that the interface is ready.
2686 static int ixgbevf_open(struct net_device *netdev)
2688 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2689 struct ixgbe_hw *hw = &adapter->hw;
2692 /* A previous failure to open the device because of a lack of
2693 * available MSIX vector resources may have reset the number
2694 * of msix vectors variable to zero. The only way to recover
2695 * is to unload/reload the driver and hope that the system has
2696 * been able to recover some MSIX vector resources.
2698 if (!adapter->num_msix_vectors)
2701 /* disallow open during test */
2702 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2705 if (hw->adapter_stopped) {
2706 ixgbevf_reset(adapter);
2707 /* if adapter is still stopped then PF isn't up and
2708 * the vf can't start. */
2709 if (hw->adapter_stopped) {
2710 err = IXGBE_ERR_MBX;
2711 pr_err("Unable to start - perhaps the PF Driver isn't "
2713 goto err_setup_reset;
2717 /* setup queue reg_idx and Rx queue count */
2718 err = ixgbevf_setup_queues(adapter);
2720 goto err_setup_queues;
2722 /* allocate transmit descriptors */
2723 err = ixgbevf_setup_all_tx_resources(adapter);
2727 /* allocate receive descriptors */
2728 err = ixgbevf_setup_all_rx_resources(adapter);
2732 ixgbevf_configure(adapter);
2735 * Map the Tx/Rx rings to the vectors we were allotted.
2736 * if request_irq will be called in this function map_rings
2737 * must be called *before* up_complete
2739 ixgbevf_map_rings_to_vectors(adapter);
2741 ixgbevf_up_complete(adapter);
2743 /* clear any pending interrupts, may auto mask */
2744 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2745 err = ixgbevf_request_irq(adapter);
2749 ixgbevf_irq_enable(adapter);
2754 ixgbevf_down(adapter);
2756 ixgbevf_free_all_rx_resources(adapter);
2758 ixgbevf_free_all_tx_resources(adapter);
2760 ixgbevf_reset(adapter);
2768 * ixgbevf_close - Disables a network interface
2769 * @netdev: network interface device structure
2771 * Returns 0, this is not allowed to fail
2773 * The close entry point is called when an interface is de-activated
2774 * by the OS. The hardware is still under the drivers control, but
2775 * needs to be disabled. A global MAC reset is issued to stop the
2776 * hardware, and all transmit and receive resources are freed.
2778 static int ixgbevf_close(struct net_device *netdev)
2780 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2782 ixgbevf_down(adapter);
2783 ixgbevf_free_irq(adapter);
2785 ixgbevf_free_all_tx_resources(adapter);
2786 ixgbevf_free_all_rx_resources(adapter);
2791 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
2792 u32 vlan_macip_lens, u32 type_tucmd,
2795 struct ixgbe_adv_tx_context_desc *context_desc;
2796 u16 i = tx_ring->next_to_use;
2798 context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
2801 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
2803 /* set bits to identify this as an advanced context descriptor */
2804 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
2806 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2807 context_desc->seqnum_seed = 0;
2808 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
2809 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2812 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
2813 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2815 u32 vlan_macip_lens, type_tucmd;
2816 u32 mss_l4len_idx, l4len;
2818 if (!skb_is_gso(skb))
2821 if (skb_header_cloned(skb)) {
2822 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2827 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2828 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
2830 if (skb->protocol == htons(ETH_P_IP)) {
2831 struct iphdr *iph = ip_hdr(skb);
2834 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2838 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2839 } else if (skb_is_gso_v6(skb)) {
2840 ipv6_hdr(skb)->payload_len = 0;
2841 tcp_hdr(skb)->check =
2842 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2843 &ipv6_hdr(skb)->daddr,
2847 /* compute header lengths */
2848 l4len = tcp_hdrlen(skb);
2850 *hdr_len = skb_transport_offset(skb) + l4len;
2852 /* mss_l4len_id: use 1 as index for TSO */
2853 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
2854 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
2855 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
2857 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
2858 vlan_macip_lens = skb_network_header_len(skb);
2859 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2860 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2862 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2863 type_tucmd, mss_l4len_idx);
2868 static bool ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
2869 struct sk_buff *skb, u32 tx_flags)
2871 u32 vlan_macip_lens = 0;
2872 u32 mss_l4len_idx = 0;
2875 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2877 switch (skb->protocol) {
2878 case __constant_htons(ETH_P_IP):
2879 vlan_macip_lens |= skb_network_header_len(skb);
2880 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2881 l4_hdr = ip_hdr(skb)->protocol;
2883 case __constant_htons(ETH_P_IPV6):
2884 vlan_macip_lens |= skb_network_header_len(skb);
2885 l4_hdr = ipv6_hdr(skb)->nexthdr;
2888 if (unlikely(net_ratelimit())) {
2889 dev_warn(tx_ring->dev,
2890 "partial checksum but proto=%x!\n",
2898 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2899 mss_l4len_idx = tcp_hdrlen(skb) <<
2900 IXGBE_ADVTXD_L4LEN_SHIFT;
2903 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
2904 mss_l4len_idx = sizeof(struct sctphdr) <<
2905 IXGBE_ADVTXD_L4LEN_SHIFT;
2908 mss_l4len_idx = sizeof(struct udphdr) <<
2909 IXGBE_ADVTXD_L4LEN_SHIFT;
2912 if (unlikely(net_ratelimit())) {
2913 dev_warn(tx_ring->dev,
2914 "partial checksum but l4 proto=%x!\n",
2921 /* vlan_macip_lens: MACLEN, VLAN tag */
2922 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2923 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2925 ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2926 type_tucmd, mss_l4len_idx);
2928 return (skb->ip_summed == CHECKSUM_PARTIAL);
2931 static int ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
2932 struct sk_buff *skb, u32 tx_flags)
2934 struct ixgbevf_tx_buffer *tx_buffer_info;
2936 unsigned int total = skb->len;
2937 unsigned int offset = 0, size;
2939 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2943 i = tx_ring->next_to_use;
2945 len = min(skb_headlen(skb), total);
2947 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2948 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2950 tx_buffer_info->length = size;
2951 tx_buffer_info->mapped_as_page = false;
2952 tx_buffer_info->dma = dma_map_single(tx_ring->dev,
2954 size, DMA_TO_DEVICE);
2955 if (dma_mapping_error(tx_ring->dev, tx_buffer_info->dma))
2963 if (i == tx_ring->count)
2967 for (f = 0; f < nr_frags; f++) {
2968 const struct skb_frag_struct *frag;
2970 frag = &skb_shinfo(skb)->frags[f];
2971 len = min((unsigned int)skb_frag_size(frag), total);
2975 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2976 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2978 tx_buffer_info->length = size;
2979 tx_buffer_info->dma =
2980 skb_frag_dma_map(tx_ring->dev, frag,
2981 offset, size, DMA_TO_DEVICE);
2982 if (dma_mapping_error(tx_ring->dev,
2983 tx_buffer_info->dma))
2985 tx_buffer_info->mapped_as_page = true;
2992 if (i == tx_ring->count)
3000 i = tx_ring->count - 1;
3003 tx_ring->tx_buffer_info[i].skb = skb;
3008 dev_err(tx_ring->dev, "TX DMA map failed\n");
3010 /* clear timestamp and dma mappings for failed tx_buffer_info map */
3011 tx_buffer_info->dma = 0;
3014 /* clear timestamp and dma mappings for remaining portion of packet */
3015 while (count >= 0) {
3019 i += tx_ring->count;
3020 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3021 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
3027 static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags,
3028 int count, unsigned int first, u32 paylen,
3031 union ixgbe_adv_tx_desc *tx_desc = NULL;
3032 struct ixgbevf_tx_buffer *tx_buffer_info;
3033 u32 olinfo_status = 0, cmd_type_len = 0;
3036 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3038 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3040 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3042 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3043 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3045 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3046 olinfo_status |= IXGBE_ADVTXD_POPTS_TXSM;
3048 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3049 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3051 /* use index 1 context for tso */
3052 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3053 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3054 olinfo_status |= IXGBE_ADVTXD_POPTS_IXSM;
3058 * Check Context must be set if Tx switch is enabled, which it
3059 * always is for case where virtual functions are running
3061 olinfo_status |= IXGBE_ADVTXD_CC;
3063 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3065 i = tx_ring->next_to_use;
3067 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3068 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3069 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3070 tx_desc->read.cmd_type_len =
3071 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3072 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3074 if (i == tx_ring->count)
3078 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3080 tx_ring->tx_buffer_info[first].time_stamp = jiffies;
3082 /* Force memory writes to complete before letting h/w
3083 * know there are new descriptors to fetch. (Only
3084 * applicable for weak-ordered memory model archs,
3089 tx_ring->tx_buffer_info[first].next_to_watch = tx_desc;
3090 tx_ring->next_to_use = i;
3093 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3095 struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3097 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3098 /* Herbert's original patch had:
3099 * smp_mb__after_netif_stop_queue();
3100 * but since that doesn't exist yet, just open code it. */
3103 /* We need to check again in a case another CPU has just
3104 * made room available. */
3105 if (likely(ixgbevf_desc_unused(tx_ring) < size))
3108 /* A reprieve! - use start_queue because it doesn't call schedule */
3109 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3110 ++adapter->restart_queue;
3114 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3116 if (likely(ixgbevf_desc_unused(tx_ring) >= size))
3118 return __ixgbevf_maybe_stop_tx(tx_ring, size);
3121 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3123 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3124 struct ixgbevf_ring *tx_ring;
3126 unsigned int tx_flags = 0;
3129 u16 count = TXD_USE_COUNT(skb_headlen(skb));
3130 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3133 u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3134 if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3136 return NETDEV_TX_OK;
3139 tx_ring = &adapter->tx_ring[r_idx];
3142 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3143 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3144 * + 2 desc gap to keep tail from touching head,
3145 * + 1 desc for context descriptor,
3146 * otherwise try next time
3148 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3149 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3150 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3152 count += skb_shinfo(skb)->nr_frags;
3154 if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3156 return NETDEV_TX_BUSY;
3159 if (vlan_tx_tag_present(skb)) {
3160 tx_flags |= vlan_tx_tag_get(skb);
3161 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3162 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3165 first = tx_ring->next_to_use;
3167 if (skb->protocol == htons(ETH_P_IP))
3168 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3169 tso = ixgbevf_tso(tx_ring, skb, tx_flags, &hdr_len);
3171 dev_kfree_skb_any(skb);
3172 return NETDEV_TX_OK;
3176 tx_flags |= IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_CSUM;
3177 else if (ixgbevf_tx_csum(tx_ring, skb, tx_flags))
3178 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3180 ixgbevf_tx_queue(tx_ring, tx_flags,
3181 ixgbevf_tx_map(tx_ring, skb, tx_flags),
3182 first, skb->len, hdr_len);
3184 writel(tx_ring->next_to_use, adapter->hw.hw_addr + tx_ring->tail);
3186 ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3188 return NETDEV_TX_OK;
3192 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3193 * @netdev: network interface device structure
3194 * @p: pointer to an address structure
3196 * Returns 0 on success, negative on failure
3198 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3200 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3201 struct ixgbe_hw *hw = &adapter->hw;
3202 struct sockaddr *addr = p;
3204 if (!is_valid_ether_addr(addr->sa_data))
3205 return -EADDRNOTAVAIL;
3207 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3208 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3210 spin_lock_bh(&adapter->mbx_lock);
3212 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3214 spin_unlock_bh(&adapter->mbx_lock);
3220 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3221 * @netdev: network interface device structure
3222 * @new_mtu: new value for maximum frame size
3224 * Returns 0 on success, negative on failure
3226 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3228 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3229 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3230 int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3232 switch (adapter->hw.api_version) {
3233 case ixgbe_mbox_api_11:
3234 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3237 if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
3238 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3242 /* MTU < 68 is an error and causes problems on some kernels */
3243 if ((new_mtu < 68) || (max_frame > max_possible_frame))
3246 hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3247 netdev->mtu, new_mtu);
3248 /* must set new MTU before calling down or up */
3249 netdev->mtu = new_mtu;
3251 if (netif_running(netdev))
3252 ixgbevf_reinit_locked(adapter);
3257 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3259 struct net_device *netdev = pci_get_drvdata(pdev);
3260 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3265 netif_device_detach(netdev);
3267 if (netif_running(netdev)) {
3269 ixgbevf_down(adapter);
3270 ixgbevf_free_irq(adapter);
3271 ixgbevf_free_all_tx_resources(adapter);
3272 ixgbevf_free_all_rx_resources(adapter);
3276 ixgbevf_clear_interrupt_scheme(adapter);
3279 retval = pci_save_state(pdev);
3284 pci_disable_device(pdev);
3290 static int ixgbevf_resume(struct pci_dev *pdev)
3292 struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev);
3293 struct net_device *netdev = adapter->netdev;
3296 pci_set_power_state(pdev, PCI_D0);
3297 pci_restore_state(pdev);
3299 * pci_restore_state clears dev->state_saved so call
3300 * pci_save_state to restore it.
3302 pci_save_state(pdev);
3304 err = pci_enable_device_mem(pdev);
3306 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3309 pci_set_master(pdev);
3311 ixgbevf_reset(adapter);
3314 err = ixgbevf_init_interrupt_scheme(adapter);
3317 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3321 if (netif_running(netdev)) {
3322 err = ixgbevf_open(netdev);
3327 netif_device_attach(netdev);
3332 #endif /* CONFIG_PM */
3333 static void ixgbevf_shutdown(struct pci_dev *pdev)
3335 ixgbevf_suspend(pdev, PMSG_SUSPEND);
3338 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3339 struct rtnl_link_stats64 *stats)
3341 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3344 const struct ixgbevf_ring *ring;
3347 ixgbevf_update_stats(adapter);
3349 stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3351 for (i = 0; i < adapter->num_rx_queues; i++) {
3352 ring = &adapter->rx_ring[i];
3354 start = u64_stats_fetch_begin_bh(&ring->syncp);
3355 bytes = ring->total_bytes;
3356 packets = ring->total_packets;
3357 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3358 stats->rx_bytes += bytes;
3359 stats->rx_packets += packets;
3362 for (i = 0; i < adapter->num_tx_queues; i++) {
3363 ring = &adapter->tx_ring[i];
3365 start = u64_stats_fetch_begin_bh(&ring->syncp);
3366 bytes = ring->total_bytes;
3367 packets = ring->total_packets;
3368 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3369 stats->tx_bytes += bytes;
3370 stats->tx_packets += packets;
3376 static const struct net_device_ops ixgbevf_netdev_ops = {
3377 .ndo_open = ixgbevf_open,
3378 .ndo_stop = ixgbevf_close,
3379 .ndo_start_xmit = ixgbevf_xmit_frame,
3380 .ndo_set_rx_mode = ixgbevf_set_rx_mode,
3381 .ndo_get_stats64 = ixgbevf_get_stats,
3382 .ndo_validate_addr = eth_validate_addr,
3383 .ndo_set_mac_address = ixgbevf_set_mac,
3384 .ndo_change_mtu = ixgbevf_change_mtu,
3385 .ndo_tx_timeout = ixgbevf_tx_timeout,
3386 .ndo_vlan_rx_add_vid = ixgbevf_vlan_rx_add_vid,
3387 .ndo_vlan_rx_kill_vid = ixgbevf_vlan_rx_kill_vid,
3388 #ifdef CONFIG_NET_RX_BUSY_POLL
3389 .ndo_busy_poll = ixgbevf_busy_poll_recv,
3393 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3395 dev->netdev_ops = &ixgbevf_netdev_ops;
3396 ixgbevf_set_ethtool_ops(dev);
3397 dev->watchdog_timeo = 5 * HZ;
3401 * ixgbevf_probe - Device Initialization Routine
3402 * @pdev: PCI device information struct
3403 * @ent: entry in ixgbevf_pci_tbl
3405 * Returns 0 on success, negative on failure
3407 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3408 * The OS initialization, configuring of the adapter private structure,
3409 * and a hardware reset occur.
3411 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3413 struct net_device *netdev;
3414 struct ixgbevf_adapter *adapter = NULL;
3415 struct ixgbe_hw *hw = NULL;
3416 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3417 static int cards_found;
3418 int err, pci_using_dac;
3420 err = pci_enable_device(pdev);
3424 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
3427 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3429 dev_err(&pdev->dev, "No usable DMA "
3430 "configuration, aborting\n");
3436 err = pci_request_regions(pdev, ixgbevf_driver_name);
3438 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3442 pci_set_master(pdev);
3444 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3448 goto err_alloc_etherdev;
3451 SET_NETDEV_DEV(netdev, &pdev->dev);
3453 pci_set_drvdata(pdev, netdev);
3454 adapter = netdev_priv(netdev);
3456 adapter->netdev = netdev;
3457 adapter->pdev = pdev;
3460 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3463 * call save state here in standalone driver because it relies on
3464 * adapter struct to exist, and needs to call netdev_priv
3466 pci_save_state(pdev);
3468 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3469 pci_resource_len(pdev, 0));
3475 ixgbevf_assign_netdev_ops(netdev);
3477 adapter->bd_number = cards_found;
3480 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3481 hw->mac.type = ii->mac;
3483 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3484 sizeof(struct ixgbe_mbx_operations));
3486 /* setup the private structure */
3487 err = ixgbevf_sw_init(adapter);
3491 /* The HW MAC address was set and/or determined in sw_init */
3492 if (!is_valid_ether_addr(netdev->dev_addr)) {
3493 pr_err("invalid MAC address\n");
3498 netdev->hw_features = NETIF_F_SG |
3505 netdev->features = netdev->hw_features |
3506 NETIF_F_HW_VLAN_CTAG_TX |
3507 NETIF_F_HW_VLAN_CTAG_RX |
3508 NETIF_F_HW_VLAN_CTAG_FILTER;
3510 netdev->vlan_features |= NETIF_F_TSO;
3511 netdev->vlan_features |= NETIF_F_TSO6;
3512 netdev->vlan_features |= NETIF_F_IP_CSUM;
3513 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3514 netdev->vlan_features |= NETIF_F_SG;
3517 netdev->features |= NETIF_F_HIGHDMA;
3519 netdev->priv_flags |= IFF_UNICAST_FLT;
3521 init_timer(&adapter->watchdog_timer);
3522 adapter->watchdog_timer.function = ixgbevf_watchdog;
3523 adapter->watchdog_timer.data = (unsigned long)adapter;
3525 INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3526 INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3528 err = ixgbevf_init_interrupt_scheme(adapter);
3532 strcpy(netdev->name, "eth%d");
3534 err = register_netdev(netdev);
3538 netif_carrier_off(netdev);
3540 ixgbevf_init_last_counter_stats(adapter);
3542 /* print the MAC address */
3543 hw_dbg(hw, "%pM\n", netdev->dev_addr);
3545 hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3547 hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3552 ixgbevf_clear_interrupt_scheme(adapter);
3554 ixgbevf_reset_interrupt_capability(adapter);
3555 iounmap(hw->hw_addr);
3557 free_netdev(netdev);
3559 pci_release_regions(pdev);
3562 pci_disable_device(pdev);
3567 * ixgbevf_remove - Device Removal Routine
3568 * @pdev: PCI device information struct
3570 * ixgbevf_remove is called by the PCI subsystem to alert the driver
3571 * that it should release a PCI device. The could be caused by a
3572 * Hot-Plug event, or because the driver is going to be removed from
3575 static void ixgbevf_remove(struct pci_dev *pdev)
3577 struct net_device *netdev = pci_get_drvdata(pdev);
3578 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3580 set_bit(__IXGBEVF_DOWN, &adapter->state);
3582 del_timer_sync(&adapter->watchdog_timer);
3584 cancel_work_sync(&adapter->reset_task);
3585 cancel_work_sync(&adapter->watchdog_task);
3587 if (netdev->reg_state == NETREG_REGISTERED)
3588 unregister_netdev(netdev);
3590 ixgbevf_clear_interrupt_scheme(adapter);
3591 ixgbevf_reset_interrupt_capability(adapter);
3593 iounmap(adapter->hw.hw_addr);
3594 pci_release_regions(pdev);
3596 hw_dbg(&adapter->hw, "Remove complete\n");
3598 kfree(adapter->tx_ring);
3599 kfree(adapter->rx_ring);
3601 free_netdev(netdev);
3603 pci_disable_device(pdev);
3607 * ixgbevf_io_error_detected - called when PCI error is detected
3608 * @pdev: Pointer to PCI device
3609 * @state: The current pci connection state
3611 * This function is called after a PCI bus error affecting
3612 * this device has been detected.
3614 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
3615 pci_channel_state_t state)
3617 struct net_device *netdev = pci_get_drvdata(pdev);
3618 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3620 netif_device_detach(netdev);
3622 if (state == pci_channel_io_perm_failure)
3623 return PCI_ERS_RESULT_DISCONNECT;
3625 if (netif_running(netdev))
3626 ixgbevf_down(adapter);
3628 pci_disable_device(pdev);
3630 /* Request a slot slot reset. */
3631 return PCI_ERS_RESULT_NEED_RESET;
3635 * ixgbevf_io_slot_reset - called after the pci bus has been reset.
3636 * @pdev: Pointer to PCI device
3638 * Restart the card from scratch, as if from a cold-boot. Implementation
3639 * resembles the first-half of the ixgbevf_resume routine.
3641 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
3643 struct net_device *netdev = pci_get_drvdata(pdev);
3644 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3646 if (pci_enable_device_mem(pdev)) {
3648 "Cannot re-enable PCI device after reset.\n");
3649 return PCI_ERS_RESULT_DISCONNECT;
3652 pci_set_master(pdev);
3654 ixgbevf_reset(adapter);
3656 return PCI_ERS_RESULT_RECOVERED;
3660 * ixgbevf_io_resume - called when traffic can start flowing again.
3661 * @pdev: Pointer to PCI device
3663 * This callback is called when the error recovery driver tells us that
3664 * its OK to resume normal operation. Implementation resembles the
3665 * second-half of the ixgbevf_resume routine.
3667 static void ixgbevf_io_resume(struct pci_dev *pdev)
3669 struct net_device *netdev = pci_get_drvdata(pdev);
3670 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3672 if (netif_running(netdev))
3673 ixgbevf_up(adapter);
3675 netif_device_attach(netdev);
3678 /* PCI Error Recovery (ERS) */
3679 static const struct pci_error_handlers ixgbevf_err_handler = {
3680 .error_detected = ixgbevf_io_error_detected,
3681 .slot_reset = ixgbevf_io_slot_reset,
3682 .resume = ixgbevf_io_resume,
3685 static struct pci_driver ixgbevf_driver = {
3686 .name = ixgbevf_driver_name,
3687 .id_table = ixgbevf_pci_tbl,
3688 .probe = ixgbevf_probe,
3689 .remove = ixgbevf_remove,
3691 /* Power Management Hooks */
3692 .suspend = ixgbevf_suspend,
3693 .resume = ixgbevf_resume,
3695 .shutdown = ixgbevf_shutdown,
3696 .err_handler = &ixgbevf_err_handler
3700 * ixgbevf_init_module - Driver Registration Routine
3702 * ixgbevf_init_module is the first routine called when the driver is
3703 * loaded. All it does is register with the PCI subsystem.
3705 static int __init ixgbevf_init_module(void)
3708 pr_info("%s - version %s\n", ixgbevf_driver_string,
3709 ixgbevf_driver_version);
3711 pr_info("%s\n", ixgbevf_copyright);
3713 ret = pci_register_driver(&ixgbevf_driver);
3717 module_init(ixgbevf_init_module);
3720 * ixgbevf_exit_module - Driver Exit Cleanup Routine
3722 * ixgbevf_exit_module is called just before the driver is removed
3725 static void __exit ixgbevf_exit_module(void)
3727 pci_unregister_driver(&ixgbevf_driver);
3732 * ixgbevf_get_hw_dev_name - return device name string
3733 * used by hardware layer to print debugging information
3735 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3737 struct ixgbevf_adapter *adapter = hw->back;
3738 return adapter->netdev->name;
3742 module_exit(ixgbevf_exit_module);
3744 /* ixgbevf_main.c */