1 /*******************************************************************************
3 Intel 82599 Virtual Function driver
4 Copyright(c) 1999 - 2009 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 ******************************************************************************/
32 #include <linux/types.h>
33 #include <linux/module.h>
34 #include <linux/pci.h>
35 #include <linux/netdevice.h>
36 #include <linux/vmalloc.h>
37 #include <linux/string.h>
40 #include <linux/tcp.h>
41 #include <linux/ipv6.h>
42 #include <linux/slab.h>
43 #include <net/checksum.h>
44 #include <net/ip6_checksum.h>
45 #include <linux/ethtool.h>
46 #include <linux/if_vlan.h>
50 char ixgbevf_driver_name[] = "ixgbevf";
51 static const char ixgbevf_driver_string[] =
52 "Intel(R) 82599 Virtual Function";
54 #define DRV_VERSION "1.0.0-k0"
55 const char ixgbevf_driver_version[] = DRV_VERSION;
56 static char ixgbevf_copyright[] = "Copyright (c) 2009 Intel Corporation.";
58 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
59 [board_82599_vf] = &ixgbevf_vf_info,
62 /* ixgbevf_pci_tbl - PCI Device ID Table
64 * Wildcard entries (PCI_ANY_ID) should come last
65 * Last entry must be all 0s
67 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
68 * Class, Class Mask, private data (not used) }
70 static struct pci_device_id ixgbevf_pci_tbl[] = {
71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF),
74 /* required last entry */
77 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
79 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
80 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
81 MODULE_LICENSE("GPL");
82 MODULE_VERSION(DRV_VERSION);
84 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
87 static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector);
88 static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx,
91 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
92 struct ixgbevf_ring *rx_ring,
96 * Force memory writes to complete before letting h/w
97 * know there are new descriptors to fetch. (Only
98 * applicable for weak-ordered memory model archs,
102 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
106 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
107 * @adapter: pointer to adapter struct
108 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
109 * @queue: queue to map the corresponding interrupt to
110 * @msix_vector: the vector to map to the corresponding queue
113 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
114 u8 queue, u8 msix_vector)
117 struct ixgbe_hw *hw = &adapter->hw;
118 if (direction == -1) {
120 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
121 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
124 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
126 /* tx or rx causes */
127 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
128 index = ((16 * (queue & 1)) + (8 * direction));
129 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
130 ivar &= ~(0xFF << index);
131 ivar |= (msix_vector << index);
132 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
136 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_adapter *adapter,
137 struct ixgbevf_tx_buffer
140 if (tx_buffer_info->dma) {
141 if (tx_buffer_info->mapped_as_page)
142 pci_unmap_page(adapter->pdev,
144 tx_buffer_info->length,
147 pci_unmap_single(adapter->pdev,
149 tx_buffer_info->length,
151 tx_buffer_info->dma = 0;
153 if (tx_buffer_info->skb) {
154 dev_kfree_skb_any(tx_buffer_info->skb);
155 tx_buffer_info->skb = NULL;
157 tx_buffer_info->time_stamp = 0;
158 /* tx_buffer_info must be completely set up in the transmit path */
161 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_adapter *adapter,
162 struct ixgbevf_ring *tx_ring,
165 struct ixgbe_hw *hw = &adapter->hw;
168 /* Detect a transmit hang in hardware, this serializes the
169 * check with the clearing of time_stamp and movement of eop */
170 head = readl(hw->hw_addr + tx_ring->head);
171 tail = readl(hw->hw_addr + tx_ring->tail);
172 adapter->detect_tx_hung = false;
173 if ((head != tail) &&
174 tx_ring->tx_buffer_info[eop].time_stamp &&
175 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ)) {
176 /* detected Tx unit hang */
177 union ixgbe_adv_tx_desc *tx_desc;
178 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
179 printk(KERN_ERR "Detected Tx Unit Hang\n"
181 " TDH, TDT <%x>, <%x>\n"
182 " next_to_use <%x>\n"
183 " next_to_clean <%x>\n"
184 "tx_buffer_info[next_to_clean]\n"
185 " time_stamp <%lx>\n"
187 tx_ring->queue_index,
189 tx_ring->next_to_use, eop,
190 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
197 #define IXGBE_MAX_TXD_PWR 14
198 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
200 /* Tx Descriptors needed, worst case */
201 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
202 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
204 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
205 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
207 #define DESC_NEEDED TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD)
210 static void ixgbevf_tx_timeout(struct net_device *netdev);
213 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
214 * @adapter: board private structure
215 * @tx_ring: tx ring to clean
217 static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter,
218 struct ixgbevf_ring *tx_ring)
220 struct net_device *netdev = adapter->netdev;
221 struct ixgbe_hw *hw = &adapter->hw;
222 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
223 struct ixgbevf_tx_buffer *tx_buffer_info;
224 unsigned int i, eop, count = 0;
225 unsigned int total_bytes = 0, total_packets = 0;
227 i = tx_ring->next_to_clean;
228 eop = tx_ring->tx_buffer_info[i].next_to_watch;
229 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
231 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
232 (count < tx_ring->work_limit)) {
233 bool cleaned = false;
234 for ( ; !cleaned; count++) {
236 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
237 tx_buffer_info = &tx_ring->tx_buffer_info[i];
238 cleaned = (i == eop);
239 skb = tx_buffer_info->skb;
241 if (cleaned && skb) {
242 unsigned int segs, bytecount;
244 /* gso_segs is currently only valid for tcp */
245 segs = skb_shinfo(skb)->gso_segs ?: 1;
246 /* multiply data chunks by size of headers */
247 bytecount = ((segs - 1) * skb_headlen(skb)) +
249 total_packets += segs;
250 total_bytes += bytecount;
253 ixgbevf_unmap_and_free_tx_resource(adapter,
256 tx_desc->wb.status = 0;
259 if (i == tx_ring->count)
263 eop = tx_ring->tx_buffer_info[i].next_to_watch;
264 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
267 tx_ring->next_to_clean = i;
269 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
270 if (unlikely(count && netif_carrier_ok(netdev) &&
271 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
272 /* Make sure that anybody stopping the queue after this
273 * sees the new next_to_clean.
277 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
278 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
279 netif_wake_subqueue(netdev, tx_ring->queue_index);
280 ++adapter->restart_queue;
283 if (netif_queue_stopped(netdev) &&
284 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
285 netif_wake_queue(netdev);
286 ++adapter->restart_queue;
291 if (adapter->detect_tx_hung) {
292 if (ixgbevf_check_tx_hang(adapter, tx_ring, i)) {
293 /* schedule immediate reset if we believe we hung */
295 "tx hang %d detected, resetting adapter\n",
296 adapter->tx_timeout_count + 1);
297 ixgbevf_tx_timeout(adapter->netdev);
301 /* re-arm the interrupt */
302 if ((count >= tx_ring->work_limit) &&
303 (!test_bit(__IXGBEVF_DOWN, &adapter->state))) {
304 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, tx_ring->v_idx);
307 tx_ring->total_bytes += total_bytes;
308 tx_ring->total_packets += total_packets;
310 adapter->net_stats.tx_bytes += total_bytes;
311 adapter->net_stats.tx_packets += total_packets;
313 return (count < tx_ring->work_limit);
317 * ixgbevf_receive_skb - Send a completed packet up the stack
318 * @q_vector: structure containing interrupt and ring information
319 * @skb: packet to send up
320 * @status: hardware indication of status of receive
321 * @rx_ring: rx descriptor ring (for a specific queue) to setup
322 * @rx_desc: rx descriptor
324 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
325 struct sk_buff *skb, u8 status,
326 struct ixgbevf_ring *ring,
327 union ixgbe_adv_rx_desc *rx_desc)
329 struct ixgbevf_adapter *adapter = q_vector->adapter;
330 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
331 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
334 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
335 if (adapter->vlgrp && is_vlan)
336 vlan_gro_receive(&q_vector->napi,
340 napi_gro_receive(&q_vector->napi, skb);
342 if (adapter->vlgrp && is_vlan)
343 ret = vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
350 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
351 * @adapter: address of board private structure
352 * @status_err: hardware indication of status of receive
353 * @skb: skb currently being received and modified
355 static inline void ixgbevf_rx_checksum(struct ixgbevf_adapter *adapter,
356 u32 status_err, struct sk_buff *skb)
358 skb->ip_summed = CHECKSUM_NONE;
360 /* Rx csum disabled */
361 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
364 /* if IP and error */
365 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
366 (status_err & IXGBE_RXDADV_ERR_IPE)) {
367 adapter->hw_csum_rx_error++;
371 if (!(status_err & IXGBE_RXD_STAT_L4CS))
374 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
375 adapter->hw_csum_rx_error++;
379 /* It must be a TCP or UDP packet with a valid checksum */
380 skb->ip_summed = CHECKSUM_UNNECESSARY;
381 adapter->hw_csum_rx_good++;
385 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
386 * @adapter: address of board private structure
388 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
389 struct ixgbevf_ring *rx_ring,
392 struct pci_dev *pdev = adapter->pdev;
393 union ixgbe_adv_rx_desc *rx_desc;
394 struct ixgbevf_rx_buffer *bi;
397 unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN;
399 i = rx_ring->next_to_use;
400 bi = &rx_ring->rx_buffer_info[i];
402 while (cleaned_count--) {
403 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
406 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
408 bi->page = netdev_alloc_page(adapter->netdev);
410 adapter->alloc_rx_page_failed++;
415 /* use a half page if we're re-using */
416 bi->page_offset ^= (PAGE_SIZE / 2);
419 bi->page_dma = pci_map_page(pdev, bi->page,
427 skb = netdev_alloc_skb(adapter->netdev,
431 adapter->alloc_rx_buff_failed++;
436 * Make buffer alignment 2 beyond a 16 byte boundary
437 * this will result in a 16 byte aligned IP header after
438 * the 14 byte MAC header is removed
440 skb_reserve(skb, NET_IP_ALIGN);
445 bi->dma = pci_map_single(pdev, skb->data,
449 /* Refresh the desc even if buffer_addrs didn't change because
450 * each write-back erases this info. */
451 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
452 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
453 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
455 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
459 if (i == rx_ring->count)
461 bi = &rx_ring->rx_buffer_info[i];
465 if (rx_ring->next_to_use != i) {
466 rx_ring->next_to_use = i;
468 i = (rx_ring->count - 1);
470 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
474 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
478 struct ixgbe_hw *hw = &adapter->hw;
480 mask = (qmask & 0xFFFFFFFF);
481 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask);
484 static inline u16 ixgbevf_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
486 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
489 static inline u16 ixgbevf_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
491 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
494 static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
495 struct ixgbevf_ring *rx_ring,
496 int *work_done, int work_to_do)
498 struct ixgbevf_adapter *adapter = q_vector->adapter;
499 struct pci_dev *pdev = adapter->pdev;
500 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
501 struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
506 bool cleaned = false;
507 int cleaned_count = 0;
508 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
510 i = rx_ring->next_to_clean;
511 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
512 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
513 rx_buffer_info = &rx_ring->rx_buffer_info[i];
515 while (staterr & IXGBE_RXD_STAT_DD) {
517 if (*work_done >= work_to_do)
521 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
522 hdr_info = le16_to_cpu(ixgbevf_get_hdr_info(rx_desc));
523 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
524 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
525 if (hdr_info & IXGBE_RXDADV_SPH)
526 adapter->rx_hdr_split++;
527 if (len > IXGBEVF_RX_HDR_SIZE)
528 len = IXGBEVF_RX_HDR_SIZE;
529 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
531 len = le16_to_cpu(rx_desc->wb.upper.length);
534 skb = rx_buffer_info->skb;
535 prefetch(skb->data - NET_IP_ALIGN);
536 rx_buffer_info->skb = NULL;
538 if (rx_buffer_info->dma) {
539 pci_unmap_single(pdev, rx_buffer_info->dma,
542 rx_buffer_info->dma = 0;
547 pci_unmap_page(pdev, rx_buffer_info->page_dma,
548 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
549 rx_buffer_info->page_dma = 0;
550 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
551 rx_buffer_info->page,
552 rx_buffer_info->page_offset,
555 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
556 (page_count(rx_buffer_info->page) != 1))
557 rx_buffer_info->page = NULL;
559 get_page(rx_buffer_info->page);
561 skb->len += upper_len;
562 skb->data_len += upper_len;
563 skb->truesize += upper_len;
567 if (i == rx_ring->count)
570 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
574 next_buffer = &rx_ring->rx_buffer_info[i];
576 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
577 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
578 rx_buffer_info->skb = next_buffer->skb;
579 rx_buffer_info->dma = next_buffer->dma;
580 next_buffer->skb = skb;
581 next_buffer->dma = 0;
583 skb->next = next_buffer->skb;
584 skb->next->prev = skb;
586 adapter->non_eop_descs++;
590 /* ERR_MASK will only have valid bits if EOP set */
591 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
592 dev_kfree_skb_irq(skb);
596 ixgbevf_rx_checksum(adapter, staterr, skb);
598 /* probably a little skewed due to removing CRC */
599 total_rx_bytes += skb->len;
603 * Work around issue of some types of VM to VM loop back
604 * packets not getting split correctly
606 if (staterr & IXGBE_RXD_STAT_LB) {
607 u32 header_fixup_len = skb->len - skb->data_len;
608 if (header_fixup_len < 14)
609 skb_push(skb, header_fixup_len);
611 skb->protocol = eth_type_trans(skb, adapter->netdev);
613 ixgbevf_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
614 adapter->netdev->last_rx = jiffies;
617 rx_desc->wb.upper.status_error = 0;
619 /* return some buffers to hardware, one at a time is too slow */
620 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
621 ixgbevf_alloc_rx_buffers(adapter, rx_ring,
626 /* use prefetched values */
628 rx_buffer_info = &rx_ring->rx_buffer_info[i];
630 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
633 rx_ring->next_to_clean = i;
634 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
637 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
639 rx_ring->total_packets += total_rx_packets;
640 rx_ring->total_bytes += total_rx_bytes;
641 adapter->net_stats.rx_bytes += total_rx_bytes;
642 adapter->net_stats.rx_packets += total_rx_packets;
648 * ixgbevf_clean_rxonly - msix (aka one shot) rx clean routine
649 * @napi: napi struct with our devices info in it
650 * @budget: amount of work driver is allowed to do this pass, in packets
652 * This function is optimized for cleaning one queue only on a single
655 static int ixgbevf_clean_rxonly(struct napi_struct *napi, int budget)
657 struct ixgbevf_q_vector *q_vector =
658 container_of(napi, struct ixgbevf_q_vector, napi);
659 struct ixgbevf_adapter *adapter = q_vector->adapter;
660 struct ixgbevf_ring *rx_ring = NULL;
664 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
665 rx_ring = &(adapter->rx_ring[r_idx]);
667 ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
669 /* If all Rx work done, exit the polling mode */
670 if (work_done < budget) {
672 if (adapter->itr_setting & 1)
673 ixgbevf_set_itr_msix(q_vector);
674 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
675 ixgbevf_irq_enable_queues(adapter, rx_ring->v_idx);
682 * ixgbevf_clean_rxonly_many - msix (aka one shot) rx clean routine
683 * @napi: napi struct with our devices info in it
684 * @budget: amount of work driver is allowed to do this pass, in packets
686 * This function will clean more than one rx queue associated with a
689 static int ixgbevf_clean_rxonly_many(struct napi_struct *napi, int budget)
691 struct ixgbevf_q_vector *q_vector =
692 container_of(napi, struct ixgbevf_q_vector, napi);
693 struct ixgbevf_adapter *adapter = q_vector->adapter;
694 struct ixgbevf_ring *rx_ring = NULL;
695 int work_done = 0, i;
699 /* attempt to distribute budget to each queue fairly, but don't allow
700 * the budget to go below 1 because we'll exit polling */
701 budget /= (q_vector->rxr_count ?: 1);
702 budget = max(budget, 1);
703 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
704 for (i = 0; i < q_vector->rxr_count; i++) {
705 rx_ring = &(adapter->rx_ring[r_idx]);
706 ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
707 enable_mask |= rx_ring->v_idx;
708 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
712 #ifndef HAVE_NETDEV_NAPI_LIST
713 if (!netif_running(adapter->netdev))
717 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
718 rx_ring = &(adapter->rx_ring[r_idx]);
720 /* If all Rx work done, exit the polling mode */
721 if (work_done < budget) {
723 if (adapter->itr_setting & 1)
724 ixgbevf_set_itr_msix(q_vector);
725 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
726 ixgbevf_irq_enable_queues(adapter, enable_mask);
734 * ixgbevf_configure_msix - Configure MSI-X hardware
735 * @adapter: board private structure
737 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
740 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
742 struct ixgbevf_q_vector *q_vector;
743 struct ixgbe_hw *hw = &adapter->hw;
744 int i, j, q_vectors, v_idx, r_idx;
747 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
750 * Populate the IVAR table and set the ITR values to the
751 * corresponding register.
753 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
754 q_vector = adapter->q_vector[v_idx];
755 /* XXX for_each_set_bit(...) */
756 r_idx = find_first_bit(q_vector->rxr_idx,
757 adapter->num_rx_queues);
759 for (i = 0; i < q_vector->rxr_count; i++) {
760 j = adapter->rx_ring[r_idx].reg_idx;
761 ixgbevf_set_ivar(adapter, 0, j, v_idx);
762 r_idx = find_next_bit(q_vector->rxr_idx,
763 adapter->num_rx_queues,
766 r_idx = find_first_bit(q_vector->txr_idx,
767 adapter->num_tx_queues);
769 for (i = 0; i < q_vector->txr_count; i++) {
770 j = adapter->tx_ring[r_idx].reg_idx;
771 ixgbevf_set_ivar(adapter, 1, j, v_idx);
772 r_idx = find_next_bit(q_vector->txr_idx,
773 adapter->num_tx_queues,
777 /* if this is a tx only vector halve the interrupt rate */
778 if (q_vector->txr_count && !q_vector->rxr_count)
779 q_vector->eitr = (adapter->eitr_param >> 1);
780 else if (q_vector->rxr_count)
782 q_vector->eitr = adapter->eitr_param;
784 ixgbevf_write_eitr(adapter, v_idx, q_vector->eitr);
787 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
789 /* set up to autoclear timer, and the vectors */
790 mask = IXGBE_EIMS_ENABLE_MASK;
791 mask &= ~IXGBE_EIMS_OTHER;
792 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, mask);
799 latency_invalid = 255
803 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
804 * @adapter: pointer to adapter
805 * @eitr: eitr setting (ints per sec) to give last timeslice
806 * @itr_setting: current throttle rate in ints/second
807 * @packets: the number of packets during this measurement interval
808 * @bytes: the number of bytes during this measurement interval
810 * Stores a new ITR value based on packets and byte
811 * counts during the last interrupt. The advantage of per interrupt
812 * computation is faster updates and more accurate ITR for the current
813 * traffic pattern. Constants in this function were computed
814 * based on theoretical maximum wire speed and thresholds were set based
815 * on testing data as well as attempting to minimize response time
816 * while increasing bulk throughput.
818 static u8 ixgbevf_update_itr(struct ixgbevf_adapter *adapter,
819 u32 eitr, u8 itr_setting,
820 int packets, int bytes)
822 unsigned int retval = itr_setting;
827 goto update_itr_done;
830 /* simple throttlerate management
831 * 0-20MB/s lowest (100000 ints/s)
832 * 20-100MB/s low (20000 ints/s)
833 * 100-1249MB/s bulk (8000 ints/s)
835 /* what was last interrupt timeslice? */
836 timepassed_us = 1000000/eitr;
837 bytes_perint = bytes / timepassed_us; /* bytes/usec */
839 switch (itr_setting) {
841 if (bytes_perint > adapter->eitr_low)
842 retval = low_latency;
845 if (bytes_perint > adapter->eitr_high)
846 retval = bulk_latency;
847 else if (bytes_perint <= adapter->eitr_low)
848 retval = lowest_latency;
851 if (bytes_perint <= adapter->eitr_high)
852 retval = low_latency;
861 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
862 * @adapter: pointer to adapter struct
863 * @v_idx: vector index into q_vector array
864 * @itr_reg: new value to be written in *register* format, not ints/s
866 * This function is made to be called by ethtool and by the driver
867 * when it needs to update VTEITR registers at runtime. Hardware
868 * specific quirks/differences are taken care of here.
870 static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx,
873 struct ixgbe_hw *hw = &adapter->hw;
875 itr_reg = EITR_INTS_PER_SEC_TO_REG(itr_reg);
878 * set the WDIS bit to not clear the timer bits and cause an
879 * immediate assertion of the interrupt
881 itr_reg |= IXGBE_EITR_CNT_WDIS;
883 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
886 static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector)
888 struct ixgbevf_adapter *adapter = q_vector->adapter;
890 u8 current_itr, ret_itr;
891 int i, r_idx, v_idx = q_vector->v_idx;
892 struct ixgbevf_ring *rx_ring, *tx_ring;
894 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
895 for (i = 0; i < q_vector->txr_count; i++) {
896 tx_ring = &(adapter->tx_ring[r_idx]);
897 ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr,
899 tx_ring->total_packets,
900 tx_ring->total_bytes);
901 /* if the result for this queue would decrease interrupt
902 * rate for this vector then use that result */
903 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
904 q_vector->tx_itr - 1 : ret_itr);
905 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
909 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
910 for (i = 0; i < q_vector->rxr_count; i++) {
911 rx_ring = &(adapter->rx_ring[r_idx]);
912 ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr,
914 rx_ring->total_packets,
915 rx_ring->total_bytes);
916 /* if the result for this queue would decrease interrupt
917 * rate for this vector then use that result */
918 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
919 q_vector->rx_itr - 1 : ret_itr);
920 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
924 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
926 switch (current_itr) {
927 /* counts and packets in update_itr are dependent on these numbers */
932 new_itr = 20000; /* aka hwitr = ~200 */
940 if (new_itr != q_vector->eitr) {
943 /* save the algorithm value here, not the smoothed one */
944 q_vector->eitr = new_itr;
945 /* do an exponential smoothing */
946 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
947 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
948 ixgbevf_write_eitr(adapter, v_idx, itr_reg);
954 static irqreturn_t ixgbevf_msix_mbx(int irq, void *data)
956 struct net_device *netdev = data;
957 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
958 struct ixgbe_hw *hw = &adapter->hw;
962 eicr = IXGBE_READ_REG(hw, IXGBE_VTEICS);
963 IXGBE_WRITE_REG(hw, IXGBE_VTEICR, eicr);
965 hw->mbx.ops.read(hw, &msg, 1);
967 if ((msg & IXGBE_MBVFICR_VFREQ_MASK) == IXGBE_PF_CONTROL_MSG)
968 mod_timer(&adapter->watchdog_timer,
969 round_jiffies(jiffies + 1));
974 static irqreturn_t ixgbevf_msix_clean_tx(int irq, void *data)
976 struct ixgbevf_q_vector *q_vector = data;
977 struct ixgbevf_adapter *adapter = q_vector->adapter;
978 struct ixgbevf_ring *tx_ring;
981 if (!q_vector->txr_count)
984 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
985 for (i = 0; i < q_vector->txr_count; i++) {
986 tx_ring = &(adapter->tx_ring[r_idx]);
987 tx_ring->total_bytes = 0;
988 tx_ring->total_packets = 0;
989 ixgbevf_clean_tx_irq(adapter, tx_ring);
990 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
994 if (adapter->itr_setting & 1)
995 ixgbevf_set_itr_msix(q_vector);
1001 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1003 * @data: pointer to our q_vector struct for this interrupt vector
1005 static irqreturn_t ixgbevf_msix_clean_rx(int irq, void *data)
1007 struct ixgbevf_q_vector *q_vector = data;
1008 struct ixgbevf_adapter *adapter = q_vector->adapter;
1009 struct ixgbe_hw *hw = &adapter->hw;
1010 struct ixgbevf_ring *rx_ring;
1014 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1015 for (i = 0; i < q_vector->rxr_count; i++) {
1016 rx_ring = &(adapter->rx_ring[r_idx]);
1017 rx_ring->total_bytes = 0;
1018 rx_ring->total_packets = 0;
1019 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1023 if (!q_vector->rxr_count)
1026 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1027 rx_ring = &(adapter->rx_ring[r_idx]);
1028 /* disable interrupts on this vector only */
1029 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, rx_ring->v_idx);
1030 napi_schedule(&q_vector->napi);
1036 static irqreturn_t ixgbevf_msix_clean_many(int irq, void *data)
1038 ixgbevf_msix_clean_rx(irq, data);
1039 ixgbevf_msix_clean_tx(irq, data);
1044 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
1047 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1049 set_bit(r_idx, q_vector->rxr_idx);
1050 q_vector->rxr_count++;
1051 a->rx_ring[r_idx].v_idx = 1 << v_idx;
1054 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
1057 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1059 set_bit(t_idx, q_vector->txr_idx);
1060 q_vector->txr_count++;
1061 a->tx_ring[t_idx].v_idx = 1 << v_idx;
1065 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1066 * @adapter: board private structure to initialize
1068 * This function maps descriptor rings to the queue-specific vectors
1069 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1070 * one vector per ring/queue, but on a constrained vector budget, we
1071 * group the rings as "efficiently" as possible. You would add new
1072 * mapping configurations in here.
1074 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
1078 int rxr_idx = 0, txr_idx = 0;
1079 int rxr_remaining = adapter->num_rx_queues;
1080 int txr_remaining = adapter->num_tx_queues;
1085 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1088 * The ideal configuration...
1089 * We have enough vectors to map one per queue.
1091 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1092 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1093 map_vector_to_rxq(adapter, v_start, rxr_idx);
1095 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1096 map_vector_to_txq(adapter, v_start, txr_idx);
1101 * If we don't have enough vectors for a 1-to-1
1102 * mapping, we'll have to group them so there are
1103 * multiple queues per vector.
1105 /* Re-adjusting *qpv takes care of the remainder. */
1106 for (i = v_start; i < q_vectors; i++) {
1107 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
1108 for (j = 0; j < rqpv; j++) {
1109 map_vector_to_rxq(adapter, i, rxr_idx);
1114 for (i = v_start; i < q_vectors; i++) {
1115 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
1116 for (j = 0; j < tqpv; j++) {
1117 map_vector_to_txq(adapter, i, txr_idx);
1128 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1129 * @adapter: board private structure
1131 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1132 * interrupts from the kernel.
1134 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1136 struct net_device *netdev = adapter->netdev;
1137 irqreturn_t (*handler)(int, void *);
1138 int i, vector, q_vectors, err;
1141 /* Decrement for Other and TCP Timer vectors */
1142 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1144 #define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count) \
1145 ? &ixgbevf_msix_clean_many : \
1146 (_v)->rxr_count ? &ixgbevf_msix_clean_rx : \
1147 (_v)->txr_count ? &ixgbevf_msix_clean_tx : \
1149 for (vector = 0; vector < q_vectors; vector++) {
1150 handler = SET_HANDLER(adapter->q_vector[vector]);
1152 if (handler == &ixgbevf_msix_clean_rx) {
1153 sprintf(adapter->name[vector], "%s-%s-%d",
1154 netdev->name, "rx", ri++);
1155 } else if (handler == &ixgbevf_msix_clean_tx) {
1156 sprintf(adapter->name[vector], "%s-%s-%d",
1157 netdev->name, "tx", ti++);
1158 } else if (handler == &ixgbevf_msix_clean_many) {
1159 sprintf(adapter->name[vector], "%s-%s-%d",
1160 netdev->name, "TxRx", vector);
1162 /* skip this unused q_vector */
1165 err = request_irq(adapter->msix_entries[vector].vector,
1166 handler, 0, adapter->name[vector],
1167 adapter->q_vector[vector]);
1169 hw_dbg(&adapter->hw,
1170 "request_irq failed for MSIX interrupt "
1171 "Error: %d\n", err);
1172 goto free_queue_irqs;
1176 sprintf(adapter->name[vector], "%s:mbx", netdev->name);
1177 err = request_irq(adapter->msix_entries[vector].vector,
1178 &ixgbevf_msix_mbx, 0, adapter->name[vector], netdev);
1180 hw_dbg(&adapter->hw,
1181 "request_irq for msix_mbx failed: %d\n", err);
1182 goto free_queue_irqs;
1188 for (i = vector - 1; i >= 0; i--)
1189 free_irq(adapter->msix_entries[--vector].vector,
1190 &(adapter->q_vector[i]));
1191 pci_disable_msix(adapter->pdev);
1192 kfree(adapter->msix_entries);
1193 adapter->msix_entries = NULL;
1197 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1199 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1201 for (i = 0; i < q_vectors; i++) {
1202 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1203 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1204 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1205 q_vector->rxr_count = 0;
1206 q_vector->txr_count = 0;
1207 q_vector->eitr = adapter->eitr_param;
1212 * ixgbevf_request_irq - initialize interrupts
1213 * @adapter: board private structure
1215 * Attempts to configure interrupts using the best available
1216 * capabilities of the hardware and kernel.
1218 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1222 err = ixgbevf_request_msix_irqs(adapter);
1225 hw_dbg(&adapter->hw,
1226 "request_irq failed, Error %d\n", err);
1231 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1233 struct net_device *netdev = adapter->netdev;
1236 q_vectors = adapter->num_msix_vectors;
1240 free_irq(adapter->msix_entries[i].vector, netdev);
1243 for (; i >= 0; i--) {
1244 free_irq(adapter->msix_entries[i].vector,
1245 adapter->q_vector[i]);
1248 ixgbevf_reset_q_vectors(adapter);
1252 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1253 * @adapter: board private structure
1255 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1258 struct ixgbe_hw *hw = &adapter->hw;
1260 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1262 IXGBE_WRITE_FLUSH(hw);
1264 for (i = 0; i < adapter->num_msix_vectors; i++)
1265 synchronize_irq(adapter->msix_entries[i].vector);
1269 * ixgbevf_irq_enable - Enable default interrupt generation settings
1270 * @adapter: board private structure
1272 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter,
1273 bool queues, bool flush)
1275 struct ixgbe_hw *hw = &adapter->hw;
1279 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1282 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask);
1285 ixgbevf_irq_enable_queues(adapter, qmask);
1288 IXGBE_WRITE_FLUSH(hw);
1292 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1293 * @adapter: board private structure
1295 * Configure the Tx unit of the MAC after a reset.
1297 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1300 struct ixgbe_hw *hw = &adapter->hw;
1301 u32 i, j, tdlen, txctrl;
1303 /* Setup the HW Tx Head and Tail descriptor pointers */
1304 for (i = 0; i < adapter->num_tx_queues; i++) {
1305 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1308 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1309 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1310 (tdba & DMA_BIT_MASK(32)));
1311 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1312 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1313 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1314 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1315 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1316 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1317 /* Disable Tx Head Writeback RO bit, since this hoses
1318 * bookkeeping if things aren't delivered in order.
1320 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1321 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1322 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1326 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1328 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1330 struct ixgbevf_ring *rx_ring;
1331 struct ixgbe_hw *hw = &adapter->hw;
1334 rx_ring = &adapter->rx_ring[index];
1336 srrctl = IXGBE_SRRCTL_DROP_EN;
1338 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1339 u16 bufsz = IXGBEVF_RXBUFFER_2048;
1340 /* grow the amount we can receive on large page machines */
1341 if (bufsz < (PAGE_SIZE / 2))
1342 bufsz = (PAGE_SIZE / 2);
1343 /* cap the bufsz at our largest descriptor size */
1344 bufsz = min((u16)IXGBEVF_MAX_RXBUFFER, bufsz);
1346 srrctl |= bufsz >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1347 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1348 srrctl |= ((IXGBEVF_RX_HDR_SIZE <<
1349 IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1350 IXGBE_SRRCTL_BSIZEHDR_MASK);
1352 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1354 if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1355 srrctl |= IXGBEVF_RXBUFFER_2048 >>
1356 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1358 srrctl |= rx_ring->rx_buf_len >>
1359 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1361 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1365 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1366 * @adapter: board private structure
1368 * Configure the Rx unit of the MAC after a reset.
1370 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1373 struct ixgbe_hw *hw = &adapter->hw;
1374 struct net_device *netdev = adapter->netdev;
1375 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1380 /* Decide whether to use packet split mode or not */
1381 if (netdev->mtu > ETH_DATA_LEN) {
1382 if (adapter->flags & IXGBE_FLAG_RX_PS_CAPABLE)
1383 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1385 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1387 if (adapter->flags & IXGBE_FLAG_RX_1BUF_CAPABLE)
1388 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1390 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1393 /* Set the RX buffer length according to the mode */
1394 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1395 /* PSRTYPE must be initialized in 82599 */
1396 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
1397 IXGBE_PSRTYPE_UDPHDR |
1398 IXGBE_PSRTYPE_IPV4HDR |
1399 IXGBE_PSRTYPE_IPV6HDR |
1400 IXGBE_PSRTYPE_L2HDR;
1401 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1402 rx_buf_len = IXGBEVF_RX_HDR_SIZE;
1404 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0);
1405 if (netdev->mtu <= ETH_DATA_LEN)
1406 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1408 rx_buf_len = ALIGN(max_frame, 1024);
1411 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1412 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1413 * the Base and Length of the Rx Descriptor Ring */
1414 for (i = 0; i < adapter->num_rx_queues; i++) {
1415 rdba = adapter->rx_ring[i].dma;
1416 j = adapter->rx_ring[i].reg_idx;
1417 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1418 (rdba & DMA_BIT_MASK(32)));
1419 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1420 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1421 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1422 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1423 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1424 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1425 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1427 ixgbevf_configure_srrctl(adapter, j);
1431 static void ixgbevf_vlan_rx_register(struct net_device *netdev,
1432 struct vlan_group *grp)
1434 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1435 struct ixgbe_hw *hw = &adapter->hw;
1439 adapter->vlgrp = grp;
1441 for (i = 0; i < adapter->num_rx_queues; i++) {
1442 j = adapter->rx_ring[i].reg_idx;
1443 ctrl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1444 ctrl |= IXGBE_RXDCTL_VME;
1445 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), ctrl);
1449 static void ixgbevf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1451 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1452 struct ixgbe_hw *hw = &adapter->hw;
1453 struct net_device *v_netdev;
1455 /* add VID to filter table */
1456 if (hw->mac.ops.set_vfta)
1457 hw->mac.ops.set_vfta(hw, vid, 0, true);
1459 * Copy feature flags from netdev to the vlan netdev for this vid.
1460 * This allows things like TSO to bubble down to our vlan device.
1462 v_netdev = vlan_group_get_device(adapter->vlgrp, vid);
1463 v_netdev->features |= adapter->netdev->features;
1464 vlan_group_set_device(adapter->vlgrp, vid, v_netdev);
1467 static void ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1469 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1470 struct ixgbe_hw *hw = &adapter->hw;
1472 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
1473 ixgbevf_irq_disable(adapter);
1475 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1477 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
1478 ixgbevf_irq_enable(adapter, true, true);
1480 /* remove VID from filter table */
1481 if (hw->mac.ops.set_vfta)
1482 hw->mac.ops.set_vfta(hw, vid, 0, false);
1485 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1487 ixgbevf_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1489 if (adapter->vlgrp) {
1491 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1492 if (!vlan_group_get_device(adapter->vlgrp, vid))
1494 ixgbevf_vlan_rx_add_vid(adapter->netdev, vid);
1500 * ixgbevf_set_rx_mode - Multicast set
1501 * @netdev: network interface device structure
1503 * The set_rx_method entry point is called whenever the multicast address
1504 * list or the network interface flags are updated. This routine is
1505 * responsible for configuring the hardware for proper multicast mode.
1507 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1509 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1510 struct ixgbe_hw *hw = &adapter->hw;
1512 /* reprogram multicast list */
1513 if (hw->mac.ops.update_mc_addr_list)
1514 hw->mac.ops.update_mc_addr_list(hw, netdev);
1517 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1520 struct ixgbevf_q_vector *q_vector;
1521 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1523 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1524 struct napi_struct *napi;
1525 q_vector = adapter->q_vector[q_idx];
1526 if (!q_vector->rxr_count)
1528 napi = &q_vector->napi;
1529 if (q_vector->rxr_count > 1)
1530 napi->poll = &ixgbevf_clean_rxonly_many;
1536 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1539 struct ixgbevf_q_vector *q_vector;
1540 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1542 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1543 q_vector = adapter->q_vector[q_idx];
1544 if (!q_vector->rxr_count)
1546 napi_disable(&q_vector->napi);
1550 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1552 struct net_device *netdev = adapter->netdev;
1555 ixgbevf_set_rx_mode(netdev);
1557 ixgbevf_restore_vlan(adapter);
1559 ixgbevf_configure_tx(adapter);
1560 ixgbevf_configure_rx(adapter);
1561 for (i = 0; i < adapter->num_rx_queues; i++) {
1562 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1563 ixgbevf_alloc_rx_buffers(adapter, ring, ring->count);
1564 ring->next_to_use = ring->count - 1;
1565 writel(ring->next_to_use, adapter->hw.hw_addr + ring->tail);
1569 #define IXGBE_MAX_RX_DESC_POLL 10
1570 static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1573 struct ixgbe_hw *hw = &adapter->hw;
1574 int j = adapter->rx_ring[rxr].reg_idx;
1577 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
1578 if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
1583 if (k >= IXGBE_MAX_RX_DESC_POLL) {
1584 hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d "
1585 "not set within the polling period\n", rxr);
1588 ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1589 (adapter->rx_ring[rxr].count - 1));
1592 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1594 /* Only save pre-reset stats if there are some */
1595 if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1596 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1597 adapter->stats.base_vfgprc;
1598 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1599 adapter->stats.base_vfgptc;
1600 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1601 adapter->stats.base_vfgorc;
1602 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1603 adapter->stats.base_vfgotc;
1604 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1605 adapter->stats.base_vfmprc;
1609 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1611 struct ixgbe_hw *hw = &adapter->hw;
1613 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1614 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1615 adapter->stats.last_vfgorc |=
1616 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1617 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1618 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1619 adapter->stats.last_vfgotc |=
1620 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1621 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1623 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1624 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1625 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1626 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1627 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1630 static int ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1632 struct net_device *netdev = adapter->netdev;
1633 struct ixgbe_hw *hw = &adapter->hw;
1635 int num_rx_rings = adapter->num_rx_queues;
1638 for (i = 0; i < adapter->num_tx_queues; i++) {
1639 j = adapter->tx_ring[i].reg_idx;
1640 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1641 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1642 txdctl |= (8 << 16);
1643 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1646 for (i = 0; i < adapter->num_tx_queues; i++) {
1647 j = adapter->tx_ring[i].reg_idx;
1648 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1649 txdctl |= IXGBE_TXDCTL_ENABLE;
1650 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1653 for (i = 0; i < num_rx_rings; i++) {
1654 j = adapter->rx_ring[i].reg_idx;
1655 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1656 rxdctl |= IXGBE_RXDCTL_ENABLE;
1657 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1658 ixgbevf_rx_desc_queue_enable(adapter, i);
1661 ixgbevf_configure_msix(adapter);
1663 if (hw->mac.ops.set_rar) {
1664 if (is_valid_ether_addr(hw->mac.addr))
1665 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1667 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1670 clear_bit(__IXGBEVF_DOWN, &adapter->state);
1671 ixgbevf_napi_enable_all(adapter);
1673 /* enable transmits */
1674 netif_tx_start_all_queues(netdev);
1676 ixgbevf_save_reset_stats(adapter);
1677 ixgbevf_init_last_counter_stats(adapter);
1679 /* bring the link up in the watchdog, this could race with our first
1680 * link up interrupt but shouldn't be a problem */
1681 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1682 adapter->link_check_timeout = jiffies;
1683 mod_timer(&adapter->watchdog_timer, jiffies);
1687 int ixgbevf_up(struct ixgbevf_adapter *adapter)
1690 struct ixgbe_hw *hw = &adapter->hw;
1692 ixgbevf_configure(adapter);
1694 err = ixgbevf_up_complete(adapter);
1696 /* clear any pending interrupts, may auto mask */
1697 IXGBE_READ_REG(hw, IXGBE_VTEICR);
1699 ixgbevf_irq_enable(adapter, true, true);
1705 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1706 * @adapter: board private structure
1707 * @rx_ring: ring to free buffers from
1709 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1710 struct ixgbevf_ring *rx_ring)
1712 struct pci_dev *pdev = adapter->pdev;
1716 if (!rx_ring->rx_buffer_info)
1719 /* Free all the Rx ring sk_buffs */
1720 for (i = 0; i < rx_ring->count; i++) {
1721 struct ixgbevf_rx_buffer *rx_buffer_info;
1723 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1724 if (rx_buffer_info->dma) {
1725 pci_unmap_single(pdev, rx_buffer_info->dma,
1726 rx_ring->rx_buf_len,
1727 PCI_DMA_FROMDEVICE);
1728 rx_buffer_info->dma = 0;
1730 if (rx_buffer_info->skb) {
1731 struct sk_buff *skb = rx_buffer_info->skb;
1732 rx_buffer_info->skb = NULL;
1734 struct sk_buff *this = skb;
1736 dev_kfree_skb(this);
1739 if (!rx_buffer_info->page)
1741 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
1742 PCI_DMA_FROMDEVICE);
1743 rx_buffer_info->page_dma = 0;
1744 put_page(rx_buffer_info->page);
1745 rx_buffer_info->page = NULL;
1746 rx_buffer_info->page_offset = 0;
1749 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1750 memset(rx_ring->rx_buffer_info, 0, size);
1752 /* Zero out the descriptor ring */
1753 memset(rx_ring->desc, 0, rx_ring->size);
1755 rx_ring->next_to_clean = 0;
1756 rx_ring->next_to_use = 0;
1759 writel(0, adapter->hw.hw_addr + rx_ring->head);
1761 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1765 * ixgbevf_clean_tx_ring - Free Tx Buffers
1766 * @adapter: board private structure
1767 * @tx_ring: ring to be cleaned
1769 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1770 struct ixgbevf_ring *tx_ring)
1772 struct ixgbevf_tx_buffer *tx_buffer_info;
1776 if (!tx_ring->tx_buffer_info)
1779 /* Free all the Tx ring sk_buffs */
1781 for (i = 0; i < tx_ring->count; i++) {
1782 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1783 ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1786 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1787 memset(tx_ring->tx_buffer_info, 0, size);
1789 memset(tx_ring->desc, 0, tx_ring->size);
1791 tx_ring->next_to_use = 0;
1792 tx_ring->next_to_clean = 0;
1795 writel(0, adapter->hw.hw_addr + tx_ring->head);
1797 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1801 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1802 * @adapter: board private structure
1804 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1808 for (i = 0; i < adapter->num_rx_queues; i++)
1809 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1813 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1814 * @adapter: board private structure
1816 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1820 for (i = 0; i < adapter->num_tx_queues; i++)
1821 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1824 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1826 struct net_device *netdev = adapter->netdev;
1827 struct ixgbe_hw *hw = &adapter->hw;
1831 /* signal that we are down to the interrupt handler */
1832 set_bit(__IXGBEVF_DOWN, &adapter->state);
1833 /* disable receives */
1835 netif_tx_disable(netdev);
1839 netif_tx_stop_all_queues(netdev);
1841 ixgbevf_irq_disable(adapter);
1843 ixgbevf_napi_disable_all(adapter);
1845 del_timer_sync(&adapter->watchdog_timer);
1846 /* can't call flush scheduled work here because it can deadlock
1847 * if linkwatch_event tries to acquire the rtnl_lock which we are
1849 while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1852 /* disable transmits in the hardware now that interrupts are off */
1853 for (i = 0; i < adapter->num_tx_queues; i++) {
1854 j = adapter->tx_ring[i].reg_idx;
1855 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1856 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1857 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1860 netif_carrier_off(netdev);
1862 if (!pci_channel_offline(adapter->pdev))
1863 ixgbevf_reset(adapter);
1865 ixgbevf_clean_all_tx_rings(adapter);
1866 ixgbevf_clean_all_rx_rings(adapter);
1869 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1871 struct ixgbe_hw *hw = &adapter->hw;
1873 WARN_ON(in_interrupt());
1875 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1879 * Check if PF is up before re-init. If not then skip until
1880 * later when the PF is up and ready to service requests from
1881 * the VF via mailbox. If the VF is up and running then the
1882 * watchdog task will continue to schedule reset tasks until
1883 * the PF is up and running.
1885 if (!hw->mac.ops.reset_hw(hw)) {
1886 ixgbevf_down(adapter);
1887 ixgbevf_up(adapter);
1890 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1893 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1895 struct ixgbe_hw *hw = &adapter->hw;
1896 struct net_device *netdev = adapter->netdev;
1898 if (hw->mac.ops.reset_hw(hw))
1899 hw_dbg(hw, "PF still resetting\n");
1901 hw->mac.ops.init_hw(hw);
1903 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1904 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1906 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1911 static void ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1914 int err, vector_threshold;
1916 /* We'll want at least 3 (vector_threshold):
1919 * 3) Other (Link Status Change, etc.)
1921 vector_threshold = MIN_MSIX_COUNT;
1923 /* The more we get, the more we will assign to Tx/Rx Cleanup
1924 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1925 * Right now, we simply care about how many we'll get; we'll
1926 * set them up later while requesting irq's.
1928 while (vectors >= vector_threshold) {
1929 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1931 if (!err) /* Success in acquiring all requested vectors. */
1934 vectors = 0; /* Nasty failure, quit now */
1935 else /* err == number of vectors we should try again with */
1939 if (vectors < vector_threshold) {
1940 /* Can't allocate enough MSI-X interrupts? Oh well.
1941 * This just means we'll go with either a single MSI
1942 * vector or fall back to legacy interrupts.
1944 hw_dbg(&adapter->hw,
1945 "Unable to allocate MSI-X interrupts\n");
1946 kfree(adapter->msix_entries);
1947 adapter->msix_entries = NULL;
1950 * Adjust for only the vectors we'll use, which is minimum
1951 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1952 * vectors we were allocated.
1954 adapter->num_msix_vectors = vectors;
1959 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
1960 * @adapter: board private structure to initialize
1962 * This is the top level queue allocation routine. The order here is very
1963 * important, starting with the "most" number of features turned on at once,
1964 * and ending with the smallest set of features. This way large combinations
1965 * can be allocated if they're turned on, and smaller combinations are the
1966 * fallthrough conditions.
1969 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1971 /* Start with base case */
1972 adapter->num_rx_queues = 1;
1973 adapter->num_tx_queues = 1;
1974 adapter->num_rx_pools = adapter->num_rx_queues;
1975 adapter->num_rx_queues_per_pool = 1;
1979 * ixgbevf_alloc_queues - Allocate memory for all rings
1980 * @adapter: board private structure to initialize
1982 * We allocate one ring per queue at run-time since we don't know the
1983 * number of queues at compile-time. The polling_netdev array is
1984 * intended for Multiqueue, but should work fine with a single queue.
1986 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1990 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1991 sizeof(struct ixgbevf_ring), GFP_KERNEL);
1992 if (!adapter->tx_ring)
1993 goto err_tx_ring_allocation;
1995 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1996 sizeof(struct ixgbevf_ring), GFP_KERNEL);
1997 if (!adapter->rx_ring)
1998 goto err_rx_ring_allocation;
2000 for (i = 0; i < adapter->num_tx_queues; i++) {
2001 adapter->tx_ring[i].count = adapter->tx_ring_count;
2002 adapter->tx_ring[i].queue_index = i;
2003 adapter->tx_ring[i].reg_idx = i;
2006 for (i = 0; i < adapter->num_rx_queues; i++) {
2007 adapter->rx_ring[i].count = adapter->rx_ring_count;
2008 adapter->rx_ring[i].queue_index = i;
2009 adapter->rx_ring[i].reg_idx = i;
2014 err_rx_ring_allocation:
2015 kfree(adapter->tx_ring);
2016 err_tx_ring_allocation:
2021 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2022 * @adapter: board private structure to initialize
2024 * Attempt to configure the interrupts using the best available
2025 * capabilities of the hardware and the kernel.
2027 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2030 int vector, v_budget;
2033 * It's easy to be greedy for MSI-X vectors, but it really
2034 * doesn't do us much good if we have a lot more vectors
2035 * than CPU's. So let's be conservative and only ask for
2036 * (roughly) twice the number of vectors as there are CPU's.
2038 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
2039 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
2041 /* A failure in MSI-X entry allocation isn't fatal, but it does
2042 * mean we disable MSI-X capabilities of the adapter. */
2043 adapter->msix_entries = kcalloc(v_budget,
2044 sizeof(struct msix_entry), GFP_KERNEL);
2045 if (!adapter->msix_entries) {
2050 for (vector = 0; vector < v_budget; vector++)
2051 adapter->msix_entries[vector].entry = vector;
2053 ixgbevf_acquire_msix_vectors(adapter, v_budget);
2060 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2061 * @adapter: board private structure to initialize
2063 * We allocate one q_vector per queue interrupt. If allocation fails we
2066 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2068 int q_idx, num_q_vectors;
2069 struct ixgbevf_q_vector *q_vector;
2071 int (*poll)(struct napi_struct *, int);
2073 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2074 napi_vectors = adapter->num_rx_queues;
2075 poll = &ixgbevf_clean_rxonly;
2077 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2078 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2081 q_vector->adapter = adapter;
2082 q_vector->v_idx = q_idx;
2083 q_vector->eitr = adapter->eitr_param;
2084 if (q_idx < napi_vectors)
2085 netif_napi_add(adapter->netdev, &q_vector->napi,
2087 adapter->q_vector[q_idx] = q_vector;
2095 q_vector = adapter->q_vector[q_idx];
2096 netif_napi_del(&q_vector->napi);
2098 adapter->q_vector[q_idx] = NULL;
2104 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2105 * @adapter: board private structure to initialize
2107 * This function frees the memory allocated to the q_vectors. In addition if
2108 * NAPI is enabled it will delete any references to the NAPI struct prior
2109 * to freeing the q_vector.
2111 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2113 int q_idx, num_q_vectors;
2116 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2117 napi_vectors = adapter->num_rx_queues;
2119 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2120 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2122 adapter->q_vector[q_idx] = NULL;
2123 if (q_idx < napi_vectors)
2124 netif_napi_del(&q_vector->napi);
2130 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2131 * @adapter: board private structure
2134 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2136 pci_disable_msix(adapter->pdev);
2137 kfree(adapter->msix_entries);
2138 adapter->msix_entries = NULL;
2144 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2145 * @adapter: board private structure to initialize
2148 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2152 /* Number of supported queues */
2153 ixgbevf_set_num_queues(adapter);
2155 err = ixgbevf_set_interrupt_capability(adapter);
2157 hw_dbg(&adapter->hw,
2158 "Unable to setup interrupt capabilities\n");
2159 goto err_set_interrupt;
2162 err = ixgbevf_alloc_q_vectors(adapter);
2164 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2166 goto err_alloc_q_vectors;
2169 err = ixgbevf_alloc_queues(adapter);
2171 printk(KERN_ERR "Unable to allocate memory for queues\n");
2172 goto err_alloc_queues;
2175 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2176 "Tx Queue count = %u\n",
2177 (adapter->num_rx_queues > 1) ? "Enabled" :
2178 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2180 set_bit(__IXGBEVF_DOWN, &adapter->state);
2184 ixgbevf_free_q_vectors(adapter);
2185 err_alloc_q_vectors:
2186 ixgbevf_reset_interrupt_capability(adapter);
2192 * ixgbevf_sw_init - Initialize general software structures
2193 * (struct ixgbevf_adapter)
2194 * @adapter: board private structure to initialize
2196 * ixgbevf_sw_init initializes the Adapter private data structure.
2197 * Fields are initialized based on PCI device information and
2198 * OS network device settings (MTU size).
2200 static int __devinit ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2202 struct ixgbe_hw *hw = &adapter->hw;
2203 struct pci_dev *pdev = adapter->pdev;
2206 /* PCI config space info */
2208 hw->vendor_id = pdev->vendor;
2209 hw->device_id = pdev->device;
2210 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2211 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2212 hw->subsystem_device_id = pdev->subsystem_device;
2214 hw->mbx.ops.init_params(hw);
2215 hw->mac.max_tx_queues = MAX_TX_QUEUES;
2216 hw->mac.max_rx_queues = MAX_RX_QUEUES;
2217 err = hw->mac.ops.reset_hw(hw);
2219 dev_info(&pdev->dev,
2220 "PF still in reset state, assigning new address\n");
2221 random_ether_addr(hw->mac.addr);
2223 err = hw->mac.ops.init_hw(hw);
2225 printk(KERN_ERR "init_shared_code failed: %d\n", err);
2230 /* Enable dynamic interrupt throttling rates */
2231 adapter->eitr_param = 20000;
2232 adapter->itr_setting = 1;
2234 /* set defaults for eitr in MegaBytes */
2235 adapter->eitr_low = 10;
2236 adapter->eitr_high = 20;
2238 /* set default ring sizes */
2239 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2240 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2242 /* enable rx csum by default */
2243 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
2245 set_bit(__IXGBEVF_DOWN, &adapter->state);
2251 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2253 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2254 if (current_counter < last_counter) \
2255 counter += 0x100000000LL; \
2256 last_counter = current_counter; \
2257 counter &= 0xFFFFFFFF00000000LL; \
2258 counter |= current_counter; \
2261 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2263 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2264 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2265 u64 current_counter = (current_counter_msb << 32) | \
2266 current_counter_lsb; \
2267 if (current_counter < last_counter) \
2268 counter += 0x1000000000LL; \
2269 last_counter = current_counter; \
2270 counter &= 0xFFFFFFF000000000LL; \
2271 counter |= current_counter; \
2274 * ixgbevf_update_stats - Update the board statistics counters.
2275 * @adapter: board private structure
2277 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2279 struct ixgbe_hw *hw = &adapter->hw;
2281 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2282 adapter->stats.vfgprc);
2283 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2284 adapter->stats.vfgptc);
2285 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2286 adapter->stats.last_vfgorc,
2287 adapter->stats.vfgorc);
2288 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2289 adapter->stats.last_vfgotc,
2290 adapter->stats.vfgotc);
2291 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2292 adapter->stats.vfmprc);
2294 /* Fill out the OS statistics structure */
2295 adapter->net_stats.multicast = adapter->stats.vfmprc -
2296 adapter->stats.base_vfmprc;
2300 * ixgbevf_watchdog - Timer Call-back
2301 * @data: pointer to adapter cast into an unsigned long
2303 static void ixgbevf_watchdog(unsigned long data)
2305 struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2306 struct ixgbe_hw *hw = &adapter->hw;
2311 * Do the watchdog outside of interrupt context due to the lovely
2312 * delays that some of the newer hardware requires
2315 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2316 goto watchdog_short_circuit;
2318 /* get one bit for every active tx/rx interrupt vector */
2319 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2320 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2321 if (qv->rxr_count || qv->txr_count)
2325 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, (u32)eics);
2327 watchdog_short_circuit:
2328 schedule_work(&adapter->watchdog_task);
2332 * ixgbevf_tx_timeout - Respond to a Tx Hang
2333 * @netdev: network interface device structure
2335 static void ixgbevf_tx_timeout(struct net_device *netdev)
2337 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2339 /* Do the reset outside of interrupt context */
2340 schedule_work(&adapter->reset_task);
2343 static void ixgbevf_reset_task(struct work_struct *work)
2345 struct ixgbevf_adapter *adapter;
2346 adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2348 /* If we're already down or resetting, just bail */
2349 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2350 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2353 adapter->tx_timeout_count++;
2355 ixgbevf_reinit_locked(adapter);
2359 * ixgbevf_watchdog_task - worker thread to bring link up
2360 * @work: pointer to work_struct containing our data
2362 static void ixgbevf_watchdog_task(struct work_struct *work)
2364 struct ixgbevf_adapter *adapter = container_of(work,
2365 struct ixgbevf_adapter,
2367 struct net_device *netdev = adapter->netdev;
2368 struct ixgbe_hw *hw = &adapter->hw;
2369 u32 link_speed = adapter->link_speed;
2370 bool link_up = adapter->link_up;
2372 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2375 * Always check the link on the watchdog because we have
2378 if (hw->mac.ops.check_link) {
2379 if ((hw->mac.ops.check_link(hw, &link_speed,
2380 &link_up, false)) != 0) {
2381 adapter->link_up = link_up;
2382 adapter->link_speed = link_speed;
2383 netif_carrier_off(netdev);
2384 netif_tx_stop_all_queues(netdev);
2385 schedule_work(&adapter->reset_task);
2389 /* always assume link is up, if no check link
2391 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
2394 adapter->link_up = link_up;
2395 adapter->link_speed = link_speed;
2398 if (!netif_carrier_ok(netdev)) {
2399 hw_dbg(&adapter->hw, "NIC Link is Up, %u Gbps\n",
2400 (link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
2402 netif_carrier_on(netdev);
2403 netif_tx_wake_all_queues(netdev);
2405 /* Force detection of hung controller */
2406 adapter->detect_tx_hung = true;
2409 adapter->link_up = false;
2410 adapter->link_speed = 0;
2411 if (netif_carrier_ok(netdev)) {
2412 hw_dbg(&adapter->hw, "NIC Link is Down\n");
2413 netif_carrier_off(netdev);
2414 netif_tx_stop_all_queues(netdev);
2418 ixgbevf_update_stats(adapter);
2421 /* Force detection of hung controller every watchdog period */
2422 adapter->detect_tx_hung = true;
2424 /* Reset the timer */
2425 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2426 mod_timer(&adapter->watchdog_timer,
2427 round_jiffies(jiffies + (2 * HZ)));
2429 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2433 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2434 * @adapter: board private structure
2435 * @tx_ring: Tx descriptor ring for a specific queue
2437 * Free all transmit software resources
2439 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2440 struct ixgbevf_ring *tx_ring)
2442 struct pci_dev *pdev = adapter->pdev;
2444 ixgbevf_clean_tx_ring(adapter, tx_ring);
2446 vfree(tx_ring->tx_buffer_info);
2447 tx_ring->tx_buffer_info = NULL;
2449 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2451 tx_ring->desc = NULL;
2455 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2456 * @adapter: board private structure
2458 * Free all transmit software resources
2460 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2464 for (i = 0; i < adapter->num_tx_queues; i++)
2465 if (adapter->tx_ring[i].desc)
2466 ixgbevf_free_tx_resources(adapter,
2467 &adapter->tx_ring[i]);
2472 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2473 * @adapter: board private structure
2474 * @tx_ring: tx descriptor ring (for a specific queue) to setup
2476 * Return 0 on success, negative on failure
2478 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2479 struct ixgbevf_ring *tx_ring)
2481 struct pci_dev *pdev = adapter->pdev;
2484 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2485 tx_ring->tx_buffer_info = vmalloc(size);
2486 if (!tx_ring->tx_buffer_info)
2488 memset(tx_ring->tx_buffer_info, 0, size);
2490 /* round up to nearest 4K */
2491 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2492 tx_ring->size = ALIGN(tx_ring->size, 4096);
2494 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
2499 tx_ring->next_to_use = 0;
2500 tx_ring->next_to_clean = 0;
2501 tx_ring->work_limit = tx_ring->count;
2505 vfree(tx_ring->tx_buffer_info);
2506 tx_ring->tx_buffer_info = NULL;
2507 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2508 "descriptor ring\n");
2513 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2514 * @adapter: board private structure
2516 * If this function returns with an error, then it's possible one or
2517 * more of the rings is populated (while the rest are not). It is the
2518 * callers duty to clean those orphaned rings.
2520 * Return 0 on success, negative on failure
2522 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2526 for (i = 0; i < adapter->num_tx_queues; i++) {
2527 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2530 hw_dbg(&adapter->hw,
2531 "Allocation for Tx Queue %u failed\n", i);
2539 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2540 * @adapter: board private structure
2541 * @rx_ring: rx descriptor ring (for a specific queue) to setup
2543 * Returns 0 on success, negative on failure
2545 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2546 struct ixgbevf_ring *rx_ring)
2548 struct pci_dev *pdev = adapter->pdev;
2551 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2552 rx_ring->rx_buffer_info = vmalloc(size);
2553 if (!rx_ring->rx_buffer_info) {
2554 hw_dbg(&adapter->hw,
2555 "Unable to vmalloc buffer memory for "
2556 "the receive descriptor ring\n");
2559 memset(rx_ring->rx_buffer_info, 0, size);
2561 /* Round up to nearest 4K */
2562 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2563 rx_ring->size = ALIGN(rx_ring->size, 4096);
2565 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
2568 if (!rx_ring->desc) {
2569 hw_dbg(&adapter->hw,
2570 "Unable to allocate memory for "
2571 "the receive descriptor ring\n");
2572 vfree(rx_ring->rx_buffer_info);
2573 rx_ring->rx_buffer_info = NULL;
2577 rx_ring->next_to_clean = 0;
2578 rx_ring->next_to_use = 0;
2586 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2587 * @adapter: board private structure
2589 * If this function returns with an error, then it's possible one or
2590 * more of the rings is populated (while the rest are not). It is the
2591 * callers duty to clean those orphaned rings.
2593 * Return 0 on success, negative on failure
2595 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2599 for (i = 0; i < adapter->num_rx_queues; i++) {
2600 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2603 hw_dbg(&adapter->hw,
2604 "Allocation for Rx Queue %u failed\n", i);
2611 * ixgbevf_free_rx_resources - Free Rx Resources
2612 * @adapter: board private structure
2613 * @rx_ring: ring to clean the resources from
2615 * Free all receive software resources
2617 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2618 struct ixgbevf_ring *rx_ring)
2620 struct pci_dev *pdev = adapter->pdev;
2622 ixgbevf_clean_rx_ring(adapter, rx_ring);
2624 vfree(rx_ring->rx_buffer_info);
2625 rx_ring->rx_buffer_info = NULL;
2627 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2629 rx_ring->desc = NULL;
2633 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2634 * @adapter: board private structure
2636 * Free all receive software resources
2638 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2642 for (i = 0; i < adapter->num_rx_queues; i++)
2643 if (adapter->rx_ring[i].desc)
2644 ixgbevf_free_rx_resources(adapter,
2645 &adapter->rx_ring[i]);
2649 * ixgbevf_open - Called when a network interface is made active
2650 * @netdev: network interface device structure
2652 * Returns 0 on success, negative value on failure
2654 * The open entry point is called when a network interface is made
2655 * active by the system (IFF_UP). At this point all resources needed
2656 * for transmit and receive operations are allocated, the interrupt
2657 * handler is registered with the OS, the watchdog timer is started,
2658 * and the stack is notified that the interface is ready.
2660 static int ixgbevf_open(struct net_device *netdev)
2662 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2663 struct ixgbe_hw *hw = &adapter->hw;
2666 /* disallow open during test */
2667 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2670 if (hw->adapter_stopped) {
2671 ixgbevf_reset(adapter);
2672 /* if adapter is still stopped then PF isn't up and
2673 * the vf can't start. */
2674 if (hw->adapter_stopped) {
2675 err = IXGBE_ERR_MBX;
2676 printk(KERN_ERR "Unable to start - perhaps the PF"
2677 " Driver isn't up yet\n");
2678 goto err_setup_reset;
2682 /* allocate transmit descriptors */
2683 err = ixgbevf_setup_all_tx_resources(adapter);
2687 /* allocate receive descriptors */
2688 err = ixgbevf_setup_all_rx_resources(adapter);
2692 ixgbevf_configure(adapter);
2695 * Map the Tx/Rx rings to the vectors we were allotted.
2696 * if request_irq will be called in this function map_rings
2697 * must be called *before* up_complete
2699 ixgbevf_map_rings_to_vectors(adapter);
2701 err = ixgbevf_up_complete(adapter);
2705 /* clear any pending interrupts, may auto mask */
2706 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2707 err = ixgbevf_request_irq(adapter);
2711 ixgbevf_irq_enable(adapter, true, true);
2716 ixgbevf_down(adapter);
2718 ixgbevf_free_irq(adapter);
2720 ixgbevf_free_all_rx_resources(adapter);
2722 ixgbevf_free_all_tx_resources(adapter);
2723 ixgbevf_reset(adapter);
2731 * ixgbevf_close - Disables a network interface
2732 * @netdev: network interface device structure
2734 * Returns 0, this is not allowed to fail
2736 * The close entry point is called when an interface is de-activated
2737 * by the OS. The hardware is still under the drivers control, but
2738 * needs to be disabled. A global MAC reset is issued to stop the
2739 * hardware, and all transmit and receive resources are freed.
2741 static int ixgbevf_close(struct net_device *netdev)
2743 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2745 ixgbevf_down(adapter);
2746 ixgbevf_free_irq(adapter);
2748 ixgbevf_free_all_tx_resources(adapter);
2749 ixgbevf_free_all_rx_resources(adapter);
2754 static int ixgbevf_tso(struct ixgbevf_adapter *adapter,
2755 struct ixgbevf_ring *tx_ring,
2756 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2758 struct ixgbe_adv_tx_context_desc *context_desc;
2761 struct ixgbevf_tx_buffer *tx_buffer_info;
2762 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
2763 u32 mss_l4len_idx, l4len;
2765 if (skb_is_gso(skb)) {
2766 if (skb_header_cloned(skb)) {
2767 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2771 l4len = tcp_hdrlen(skb);
2774 if (skb->protocol == htons(ETH_P_IP)) {
2775 struct iphdr *iph = ip_hdr(skb);
2778 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2782 adapter->hw_tso_ctxt++;
2783 } else if (skb_is_gso_v6(skb)) {
2784 ipv6_hdr(skb)->payload_len = 0;
2785 tcp_hdr(skb)->check =
2786 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2787 &ipv6_hdr(skb)->daddr,
2789 adapter->hw_tso6_ctxt++;
2792 i = tx_ring->next_to_use;
2794 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2795 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2797 /* VLAN MACLEN IPLEN */
2798 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2800 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2801 vlan_macip_lens |= ((skb_network_offset(skb)) <<
2802 IXGBE_ADVTXD_MACLEN_SHIFT);
2803 *hdr_len += skb_network_offset(skb);
2805 (skb_transport_header(skb) - skb_network_header(skb));
2807 (skb_transport_header(skb) - skb_network_header(skb));
2808 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2809 context_desc->seqnum_seed = 0;
2811 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2812 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
2813 IXGBE_ADVTXD_DTYP_CTXT);
2815 if (skb->protocol == htons(ETH_P_IP))
2816 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2817 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2818 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2822 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
2823 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
2824 /* use index 1 for TSO */
2825 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
2826 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2828 tx_buffer_info->time_stamp = jiffies;
2829 tx_buffer_info->next_to_watch = i;
2832 if (i == tx_ring->count)
2834 tx_ring->next_to_use = i;
2842 static bool ixgbevf_tx_csum(struct ixgbevf_adapter *adapter,
2843 struct ixgbevf_ring *tx_ring,
2844 struct sk_buff *skb, u32 tx_flags)
2846 struct ixgbe_adv_tx_context_desc *context_desc;
2848 struct ixgbevf_tx_buffer *tx_buffer_info;
2849 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2851 if (skb->ip_summed == CHECKSUM_PARTIAL ||
2852 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
2853 i = tx_ring->next_to_use;
2854 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2855 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2857 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2858 vlan_macip_lens |= (tx_flags &
2859 IXGBE_TX_FLAGS_VLAN_MASK);
2860 vlan_macip_lens |= (skb_network_offset(skb) <<
2861 IXGBE_ADVTXD_MACLEN_SHIFT);
2862 if (skb->ip_summed == CHECKSUM_PARTIAL)
2863 vlan_macip_lens |= (skb_transport_header(skb) -
2864 skb_network_header(skb));
2866 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2867 context_desc->seqnum_seed = 0;
2869 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2870 IXGBE_ADVTXD_DTYP_CTXT);
2872 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2873 switch (skb->protocol) {
2874 case __constant_htons(ETH_P_IP):
2875 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2876 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2878 IXGBE_ADVTXD_TUCMD_L4T_TCP;
2880 case __constant_htons(ETH_P_IPV6):
2881 /* XXX what about other V6 headers?? */
2882 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2884 IXGBE_ADVTXD_TUCMD_L4T_TCP;
2887 if (unlikely(net_ratelimit())) {
2889 "partial checksum but "
2897 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2898 /* use index zero for tx checksum offload */
2899 context_desc->mss_l4len_idx = 0;
2901 tx_buffer_info->time_stamp = jiffies;
2902 tx_buffer_info->next_to_watch = i;
2904 adapter->hw_csum_tx_good++;
2906 if (i == tx_ring->count)
2908 tx_ring->next_to_use = i;
2916 static int ixgbevf_tx_map(struct ixgbevf_adapter *adapter,
2917 struct ixgbevf_ring *tx_ring,
2918 struct sk_buff *skb, u32 tx_flags,
2921 struct pci_dev *pdev = adapter->pdev;
2922 struct ixgbevf_tx_buffer *tx_buffer_info;
2924 unsigned int total = skb->len;
2925 unsigned int offset = 0, size, count = 0;
2926 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2930 i = tx_ring->next_to_use;
2932 len = min(skb_headlen(skb), total);
2934 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2935 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2937 tx_buffer_info->length = size;
2938 tx_buffer_info->mapped_as_page = false;
2939 tx_buffer_info->dma = pci_map_single(adapter->pdev,
2941 size, PCI_DMA_TODEVICE);
2942 if (pci_dma_mapping_error(pdev, tx_buffer_info->dma))
2944 tx_buffer_info->time_stamp = jiffies;
2945 tx_buffer_info->next_to_watch = i;
2952 if (i == tx_ring->count)
2956 for (f = 0; f < nr_frags; f++) {
2957 struct skb_frag_struct *frag;
2959 frag = &skb_shinfo(skb)->frags[f];
2960 len = min((unsigned int)frag->size, total);
2961 offset = frag->page_offset;
2964 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2965 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2967 tx_buffer_info->length = size;
2968 tx_buffer_info->dma = pci_map_page(adapter->pdev,
2973 tx_buffer_info->mapped_as_page = true;
2974 if (pci_dma_mapping_error(pdev, tx_buffer_info->dma))
2976 tx_buffer_info->time_stamp = jiffies;
2977 tx_buffer_info->next_to_watch = i;
2984 if (i == tx_ring->count)
2992 i = tx_ring->count - 1;
2995 tx_ring->tx_buffer_info[i].skb = skb;
2996 tx_ring->tx_buffer_info[first].next_to_watch = i;
3001 dev_err(&pdev->dev, "TX DMA map failed\n");
3003 /* clear timestamp and dma mappings for failed tx_buffer_info map */
3004 tx_buffer_info->dma = 0;
3005 tx_buffer_info->time_stamp = 0;
3006 tx_buffer_info->next_to_watch = 0;
3009 /* clear timestamp and dma mappings for remaining portion of packet */
3010 while (count >= 0) {
3014 i += tx_ring->count;
3015 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3016 ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info);
3022 static void ixgbevf_tx_queue(struct ixgbevf_adapter *adapter,
3023 struct ixgbevf_ring *tx_ring, int tx_flags,
3024 int count, u32 paylen, u8 hdr_len)
3026 union ixgbe_adv_tx_desc *tx_desc = NULL;
3027 struct ixgbevf_tx_buffer *tx_buffer_info;
3028 u32 olinfo_status = 0, cmd_type_len = 0;
3031 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3033 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3035 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3037 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3038 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3040 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3041 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3043 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3044 IXGBE_ADVTXD_POPTS_SHIFT;
3046 /* use index 1 context for tso */
3047 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3048 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3049 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
3050 IXGBE_ADVTXD_POPTS_SHIFT;
3052 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3053 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3054 IXGBE_ADVTXD_POPTS_SHIFT;
3056 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3058 i = tx_ring->next_to_use;
3060 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3061 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
3062 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3063 tx_desc->read.cmd_type_len =
3064 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3065 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3067 if (i == tx_ring->count)
3071 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3074 * Force memory writes to complete before letting h/w
3075 * know there are new descriptors to fetch. (Only
3076 * applicable for weak-ordered memory model archs,
3081 tx_ring->next_to_use = i;
3082 writel(i, adapter->hw.hw_addr + tx_ring->tail);
3085 static int __ixgbevf_maybe_stop_tx(struct net_device *netdev,
3086 struct ixgbevf_ring *tx_ring, int size)
3088 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3090 netif_stop_subqueue(netdev, tx_ring->queue_index);
3091 /* Herbert's original patch had:
3092 * smp_mb__after_netif_stop_queue();
3093 * but since that doesn't exist yet, just open code it. */
3096 /* We need to check again in a case another CPU has just
3097 * made room available. */
3098 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3101 /* A reprieve! - use start_queue because it doesn't call schedule */
3102 netif_start_subqueue(netdev, tx_ring->queue_index);
3103 ++adapter->restart_queue;
3107 static int ixgbevf_maybe_stop_tx(struct net_device *netdev,
3108 struct ixgbevf_ring *tx_ring, int size)
3110 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3112 return __ixgbevf_maybe_stop_tx(netdev, tx_ring, size);
3115 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3117 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3118 struct ixgbevf_ring *tx_ring;
3120 unsigned int tx_flags = 0;
3127 tx_ring = &adapter->tx_ring[r_idx];
3129 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3130 tx_flags |= vlan_tx_tag_get(skb);
3131 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3132 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3135 /* four things can cause us to need a context descriptor */
3136 if (skb_is_gso(skb) ||
3137 (skb->ip_summed == CHECKSUM_PARTIAL) ||
3138 (tx_flags & IXGBE_TX_FLAGS_VLAN))
3141 count += TXD_USE_COUNT(skb_headlen(skb));
3142 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3143 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3145 if (ixgbevf_maybe_stop_tx(netdev, tx_ring, count)) {
3147 return NETDEV_TX_BUSY;
3150 first = tx_ring->next_to_use;
3152 if (skb->protocol == htons(ETH_P_IP))
3153 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3154 tso = ixgbevf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
3156 dev_kfree_skb_any(skb);
3157 return NETDEV_TX_OK;
3161 tx_flags |= IXGBE_TX_FLAGS_TSO;
3162 else if (ixgbevf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
3163 (skb->ip_summed == CHECKSUM_PARTIAL))
3164 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3166 ixgbevf_tx_queue(adapter, tx_ring, tx_flags,
3167 ixgbevf_tx_map(adapter, tx_ring, skb, tx_flags, first),
3170 netdev->trans_start = jiffies;
3172 ixgbevf_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
3174 return NETDEV_TX_OK;
3178 * ixgbevf_get_stats - Get System Network Statistics
3179 * @netdev: network interface device structure
3181 * Returns the address of the device statistics structure.
3182 * The statistics are actually updated from the timer callback.
3184 static struct net_device_stats *ixgbevf_get_stats(struct net_device *netdev)
3186 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3188 /* only return the current stats */
3189 return &adapter->net_stats;
3193 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3194 * @netdev: network interface device structure
3195 * @p: pointer to an address structure
3197 * Returns 0 on success, negative on failure
3199 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3201 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3202 struct ixgbe_hw *hw = &adapter->hw;
3203 struct sockaddr *addr = p;
3205 if (!is_valid_ether_addr(addr->sa_data))
3206 return -EADDRNOTAVAIL;
3208 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3209 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3211 if (hw->mac.ops.set_rar)
3212 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3218 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3219 * @netdev: network interface device structure
3220 * @new_mtu: new value for maximum frame size
3222 * Returns 0 on success, negative on failure
3224 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3226 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3227 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3229 /* MTU < 68 is an error and causes problems on some kernels */
3230 if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
3233 hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3234 netdev->mtu, new_mtu);
3235 /* must set new MTU before calling down or up */
3236 netdev->mtu = new_mtu;
3238 if (netif_running(netdev))
3239 ixgbevf_reinit_locked(adapter);
3244 static void ixgbevf_shutdown(struct pci_dev *pdev)
3246 struct net_device *netdev = pci_get_drvdata(pdev);
3247 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3249 netif_device_detach(netdev);
3251 if (netif_running(netdev)) {
3252 ixgbevf_down(adapter);
3253 ixgbevf_free_irq(adapter);
3254 ixgbevf_free_all_tx_resources(adapter);
3255 ixgbevf_free_all_rx_resources(adapter);
3259 pci_save_state(pdev);
3262 pci_disable_device(pdev);
3265 static const struct net_device_ops ixgbe_netdev_ops = {
3266 .ndo_open = &ixgbevf_open,
3267 .ndo_stop = &ixgbevf_close,
3268 .ndo_start_xmit = &ixgbevf_xmit_frame,
3269 .ndo_get_stats = &ixgbevf_get_stats,
3270 .ndo_set_rx_mode = &ixgbevf_set_rx_mode,
3271 .ndo_set_multicast_list = &ixgbevf_set_rx_mode,
3272 .ndo_validate_addr = eth_validate_addr,
3273 .ndo_set_mac_address = &ixgbevf_set_mac,
3274 .ndo_change_mtu = &ixgbevf_change_mtu,
3275 .ndo_tx_timeout = &ixgbevf_tx_timeout,
3276 .ndo_vlan_rx_register = &ixgbevf_vlan_rx_register,
3277 .ndo_vlan_rx_add_vid = &ixgbevf_vlan_rx_add_vid,
3278 .ndo_vlan_rx_kill_vid = &ixgbevf_vlan_rx_kill_vid,
3281 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3283 struct ixgbevf_adapter *adapter;
3284 adapter = netdev_priv(dev);
3285 dev->netdev_ops = &ixgbe_netdev_ops;
3286 ixgbevf_set_ethtool_ops(dev);
3287 dev->watchdog_timeo = 5 * HZ;
3291 * ixgbevf_probe - Device Initialization Routine
3292 * @pdev: PCI device information struct
3293 * @ent: entry in ixgbevf_pci_tbl
3295 * Returns 0 on success, negative on failure
3297 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3298 * The OS initialization, configuring of the adapter private structure,
3299 * and a hardware reset occur.
3301 static int __devinit ixgbevf_probe(struct pci_dev *pdev,
3302 const struct pci_device_id *ent)
3304 struct net_device *netdev;
3305 struct ixgbevf_adapter *adapter = NULL;
3306 struct ixgbe_hw *hw = NULL;
3307 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3308 static int cards_found;
3309 int err, pci_using_dac;
3311 err = pci_enable_device(pdev);
3315 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
3316 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
3319 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3321 err = pci_set_consistent_dma_mask(pdev,
3324 dev_err(&pdev->dev, "No usable DMA "
3325 "configuration, aborting\n");
3332 err = pci_request_regions(pdev, ixgbevf_driver_name);
3334 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3338 pci_set_master(pdev);
3341 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3344 netdev = alloc_etherdev(sizeof(struct ixgbevf_adapter));
3348 goto err_alloc_etherdev;
3351 SET_NETDEV_DEV(netdev, &pdev->dev);
3353 pci_set_drvdata(pdev, netdev);
3354 adapter = netdev_priv(netdev);
3356 adapter->netdev = netdev;
3357 adapter->pdev = pdev;
3360 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3363 * call save state here in standalone driver because it relies on
3364 * adapter struct to exist, and needs to call netdev_priv
3366 pci_save_state(pdev);
3368 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3369 pci_resource_len(pdev, 0));
3375 ixgbevf_assign_netdev_ops(netdev);
3377 adapter->bd_number = cards_found;
3380 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3381 hw->mac.type = ii->mac;
3383 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3384 sizeof(struct ixgbe_mac_operations));
3386 adapter->flags &= ~IXGBE_FLAG_RX_PS_CAPABLE;
3387 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
3388 adapter->flags |= IXGBE_FLAG_RX_1BUF_CAPABLE;
3390 /* setup the private structure */
3391 err = ixgbevf_sw_init(adapter);
3393 #ifdef MAX_SKB_FRAGS
3394 netdev->features = NETIF_F_SG |
3396 NETIF_F_HW_VLAN_TX |
3397 NETIF_F_HW_VLAN_RX |
3398 NETIF_F_HW_VLAN_FILTER;
3400 netdev->features |= NETIF_F_IPV6_CSUM;
3401 netdev->features |= NETIF_F_TSO;
3402 netdev->features |= NETIF_F_TSO6;
3403 netdev->vlan_features |= NETIF_F_TSO;
3404 netdev->vlan_features |= NETIF_F_TSO6;
3405 netdev->vlan_features |= NETIF_F_IP_CSUM;
3406 netdev->vlan_features |= NETIF_F_SG;
3409 netdev->features |= NETIF_F_HIGHDMA;
3411 #endif /* MAX_SKB_FRAGS */
3413 /* The HW MAC address was set and/or determined in sw_init */
3414 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
3415 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
3417 if (!is_valid_ether_addr(netdev->dev_addr)) {
3418 printk(KERN_ERR "invalid MAC address\n");
3423 init_timer(&adapter->watchdog_timer);
3424 adapter->watchdog_timer.function = &ixgbevf_watchdog;
3425 adapter->watchdog_timer.data = (unsigned long)adapter;
3427 INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3428 INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3430 err = ixgbevf_init_interrupt_scheme(adapter);
3434 /* pick up the PCI bus settings for reporting later */
3435 if (hw->mac.ops.get_bus_info)
3436 hw->mac.ops.get_bus_info(hw);
3439 netif_carrier_off(netdev);
3440 netif_tx_stop_all_queues(netdev);
3442 strcpy(netdev->name, "eth%d");
3444 err = register_netdev(netdev);
3448 adapter->netdev_registered = true;
3450 ixgbevf_init_last_counter_stats(adapter);
3452 /* print the MAC address */
3453 hw_dbg(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
3454 netdev->dev_addr[0],
3455 netdev->dev_addr[1],
3456 netdev->dev_addr[2],
3457 netdev->dev_addr[3],
3458 netdev->dev_addr[4],
3459 netdev->dev_addr[5]);
3461 hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3463 hw_dbg(hw, "LRO is disabled\n");
3465 hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3471 ixgbevf_reset_interrupt_capability(adapter);
3472 iounmap(hw->hw_addr);
3474 free_netdev(netdev);
3476 pci_release_regions(pdev);
3479 pci_disable_device(pdev);
3484 * ixgbevf_remove - Device Removal Routine
3485 * @pdev: PCI device information struct
3487 * ixgbevf_remove is called by the PCI subsystem to alert the driver
3488 * that it should release a PCI device. The could be caused by a
3489 * Hot-Plug event, or because the driver is going to be removed from
3492 static void __devexit ixgbevf_remove(struct pci_dev *pdev)
3494 struct net_device *netdev = pci_get_drvdata(pdev);
3495 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3497 set_bit(__IXGBEVF_DOWN, &adapter->state);
3499 del_timer_sync(&adapter->watchdog_timer);
3501 cancel_work_sync(&adapter->watchdog_task);
3503 flush_scheduled_work();
3505 if (adapter->netdev_registered) {
3506 unregister_netdev(netdev);
3507 adapter->netdev_registered = false;
3510 ixgbevf_reset_interrupt_capability(adapter);
3512 iounmap(adapter->hw.hw_addr);
3513 pci_release_regions(pdev);
3515 hw_dbg(&adapter->hw, "Remove complete\n");
3517 kfree(adapter->tx_ring);
3518 kfree(adapter->rx_ring);
3520 free_netdev(netdev);
3522 pci_disable_device(pdev);
3525 static struct pci_driver ixgbevf_driver = {
3526 .name = ixgbevf_driver_name,
3527 .id_table = ixgbevf_pci_tbl,
3528 .probe = ixgbevf_probe,
3529 .remove = __devexit_p(ixgbevf_remove),
3530 .shutdown = ixgbevf_shutdown,
3534 * ixgbe_init_module - Driver Registration Routine
3536 * ixgbe_init_module is the first routine called when the driver is
3537 * loaded. All it does is register with the PCI subsystem.
3539 static int __init ixgbevf_init_module(void)
3542 printk(KERN_INFO "ixgbevf: %s - version %s\n", ixgbevf_driver_string,
3543 ixgbevf_driver_version);
3545 printk(KERN_INFO "%s\n", ixgbevf_copyright);
3547 ret = pci_register_driver(&ixgbevf_driver);
3551 module_init(ixgbevf_init_module);
3554 * ixgbe_exit_module - Driver Exit Cleanup Routine
3556 * ixgbe_exit_module is called just before the driver is removed
3559 static void __exit ixgbevf_exit_module(void)
3561 pci_unregister_driver(&ixgbevf_driver);
3566 * ixgbe_get_hw_dev_name - return device name string
3567 * used by hardware layer to print debugging information
3569 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3571 struct ixgbevf_adapter *adapter = hw->back;
3572 return adapter->netdev->name;
3576 module_exit(ixgbevf_exit_module);
3578 /* ixgbevf_main.c */