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 <net/checksum.h>
43 #include <net/ip6_checksum.h>
44 #include <linux/ethtool.h>
45 #include <linux/if_vlan.h>
49 char ixgbevf_driver_name[] = "ixgbevf";
50 static const char ixgbevf_driver_string[] =
51 "Intel(R) 82599 Virtual Function";
53 #define DRV_VERSION "1.0.0-k0"
54 const char ixgbevf_driver_version[] = DRV_VERSION;
55 static char ixgbevf_copyright[] = "Copyright (c) 2009 Intel Corporation.";
57 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
58 [board_82599_vf] = &ixgbevf_vf_info,
61 /* ixgbevf_pci_tbl - PCI Device ID Table
63 * Wildcard entries (PCI_ANY_ID) should come last
64 * Last entry must be all 0s
66 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
67 * Class, Class Mask, private data (not used) }
69 static struct pci_device_id ixgbevf_pci_tbl[] = {
70 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF),
73 /* required last entry */
76 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
78 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
79 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
80 MODULE_LICENSE("GPL");
81 MODULE_VERSION(DRV_VERSION);
83 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
86 static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector);
87 static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx,
90 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
91 struct ixgbevf_ring *rx_ring,
95 * Force memory writes to complete before letting h/w
96 * know there are new descriptors to fetch. (Only
97 * applicable for weak-ordered memory model archs,
101 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
105 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
106 * @adapter: pointer to adapter struct
107 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
108 * @queue: queue to map the corresponding interrupt to
109 * @msix_vector: the vector to map to the corresponding queue
112 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
113 u8 queue, u8 msix_vector)
116 struct ixgbe_hw *hw = &adapter->hw;
117 if (direction == -1) {
119 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
120 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
123 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
125 /* tx or rx causes */
126 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
127 index = ((16 * (queue & 1)) + (8 * direction));
128 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
129 ivar &= ~(0xFF << index);
130 ivar |= (msix_vector << index);
131 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
135 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_adapter *adapter,
136 struct ixgbevf_tx_buffer
139 if (tx_buffer_info->dma) {
140 if (tx_buffer_info->mapped_as_page)
141 pci_unmap_page(adapter->pdev,
143 tx_buffer_info->length,
146 pci_unmap_single(adapter->pdev,
148 tx_buffer_info->length,
150 tx_buffer_info->dma = 0;
152 if (tx_buffer_info->skb) {
153 dev_kfree_skb_any(tx_buffer_info->skb);
154 tx_buffer_info->skb = NULL;
156 tx_buffer_info->time_stamp = 0;
157 /* tx_buffer_info must be completely set up in the transmit path */
160 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_adapter *adapter,
161 struct ixgbevf_ring *tx_ring,
164 struct ixgbe_hw *hw = &adapter->hw;
167 /* Detect a transmit hang in hardware, this serializes the
168 * check with the clearing of time_stamp and movement of eop */
169 head = readl(hw->hw_addr + tx_ring->head);
170 tail = readl(hw->hw_addr + tx_ring->tail);
171 adapter->detect_tx_hung = false;
172 if ((head != tail) &&
173 tx_ring->tx_buffer_info[eop].time_stamp &&
174 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ)) {
175 /* detected Tx unit hang */
176 union ixgbe_adv_tx_desc *tx_desc;
177 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
178 printk(KERN_ERR "Detected Tx Unit Hang\n"
180 " TDH, TDT <%x>, <%x>\n"
181 " next_to_use <%x>\n"
182 " next_to_clean <%x>\n"
183 "tx_buffer_info[next_to_clean]\n"
184 " time_stamp <%lx>\n"
186 tx_ring->queue_index,
188 tx_ring->next_to_use, eop,
189 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
196 #define IXGBE_MAX_TXD_PWR 14
197 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
199 /* Tx Descriptors needed, worst case */
200 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
201 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
203 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
204 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
206 #define DESC_NEEDED TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD)
209 static void ixgbevf_tx_timeout(struct net_device *netdev);
212 * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
213 * @adapter: board private structure
214 * @tx_ring: tx ring to clean
216 static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter,
217 struct ixgbevf_ring *tx_ring)
219 struct net_device *netdev = adapter->netdev;
220 struct ixgbe_hw *hw = &adapter->hw;
221 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
222 struct ixgbevf_tx_buffer *tx_buffer_info;
223 unsigned int i, eop, count = 0;
224 unsigned int total_bytes = 0, total_packets = 0;
226 i = tx_ring->next_to_clean;
227 eop = tx_ring->tx_buffer_info[i].next_to_watch;
228 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
230 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
231 (count < tx_ring->work_limit)) {
232 bool cleaned = false;
233 for ( ; !cleaned; count++) {
235 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
236 tx_buffer_info = &tx_ring->tx_buffer_info[i];
237 cleaned = (i == eop);
238 skb = tx_buffer_info->skb;
240 if (cleaned && skb) {
241 unsigned int segs, bytecount;
243 /* gso_segs is currently only valid for tcp */
244 segs = skb_shinfo(skb)->gso_segs ?: 1;
245 /* multiply data chunks by size of headers */
246 bytecount = ((segs - 1) * skb_headlen(skb)) +
248 total_packets += segs;
249 total_bytes += bytecount;
252 ixgbevf_unmap_and_free_tx_resource(adapter,
255 tx_desc->wb.status = 0;
258 if (i == tx_ring->count)
262 eop = tx_ring->tx_buffer_info[i].next_to_watch;
263 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
266 tx_ring->next_to_clean = i;
268 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
269 if (unlikely(count && netif_carrier_ok(netdev) &&
270 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
271 /* Make sure that anybody stopping the queue after this
272 * sees the new next_to_clean.
276 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
277 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
278 netif_wake_subqueue(netdev, tx_ring->queue_index);
279 ++adapter->restart_queue;
282 if (netif_queue_stopped(netdev) &&
283 !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
284 netif_wake_queue(netdev);
285 ++adapter->restart_queue;
290 if (adapter->detect_tx_hung) {
291 if (ixgbevf_check_tx_hang(adapter, tx_ring, i)) {
292 /* schedule immediate reset if we believe we hung */
294 "tx hang %d detected, resetting adapter\n",
295 adapter->tx_timeout_count + 1);
296 ixgbevf_tx_timeout(adapter->netdev);
300 /* re-arm the interrupt */
301 if ((count >= tx_ring->work_limit) &&
302 (!test_bit(__IXGBEVF_DOWN, &adapter->state))) {
303 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, tx_ring->v_idx);
306 tx_ring->total_bytes += total_bytes;
307 tx_ring->total_packets += total_packets;
309 adapter->net_stats.tx_bytes += total_bytes;
310 adapter->net_stats.tx_packets += total_packets;
312 return (count < tx_ring->work_limit);
316 * ixgbevf_receive_skb - Send a completed packet up the stack
317 * @q_vector: structure containing interrupt and ring information
318 * @skb: packet to send up
319 * @status: hardware indication of status of receive
320 * @rx_ring: rx descriptor ring (for a specific queue) to setup
321 * @rx_desc: rx descriptor
323 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
324 struct sk_buff *skb, u8 status,
325 struct ixgbevf_ring *ring,
326 union ixgbe_adv_rx_desc *rx_desc)
328 struct ixgbevf_adapter *adapter = q_vector->adapter;
329 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
330 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
333 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
334 if (adapter->vlgrp && is_vlan)
335 vlan_gro_receive(&q_vector->napi,
339 napi_gro_receive(&q_vector->napi, skb);
341 if (adapter->vlgrp && is_vlan)
342 ret = vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
349 * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
350 * @adapter: address of board private structure
351 * @status_err: hardware indication of status of receive
352 * @skb: skb currently being received and modified
354 static inline void ixgbevf_rx_checksum(struct ixgbevf_adapter *adapter,
355 u32 status_err, struct sk_buff *skb)
357 skb->ip_summed = CHECKSUM_NONE;
359 /* Rx csum disabled */
360 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
363 /* if IP and error */
364 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
365 (status_err & IXGBE_RXDADV_ERR_IPE)) {
366 adapter->hw_csum_rx_error++;
370 if (!(status_err & IXGBE_RXD_STAT_L4CS))
373 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
374 adapter->hw_csum_rx_error++;
378 /* It must be a TCP or UDP packet with a valid checksum */
379 skb->ip_summed = CHECKSUM_UNNECESSARY;
380 adapter->hw_csum_rx_good++;
384 * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
385 * @adapter: address of board private structure
387 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
388 struct ixgbevf_ring *rx_ring,
391 struct pci_dev *pdev = adapter->pdev;
392 union ixgbe_adv_rx_desc *rx_desc;
393 struct ixgbevf_rx_buffer *bi;
396 unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN;
398 i = rx_ring->next_to_use;
399 bi = &rx_ring->rx_buffer_info[i];
401 while (cleaned_count--) {
402 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
405 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
407 bi->page = netdev_alloc_page(adapter->netdev);
409 adapter->alloc_rx_page_failed++;
414 /* use a half page if we're re-using */
415 bi->page_offset ^= (PAGE_SIZE / 2);
418 bi->page_dma = pci_map_page(pdev, bi->page,
426 skb = netdev_alloc_skb(adapter->netdev,
430 adapter->alloc_rx_buff_failed++;
435 * Make buffer alignment 2 beyond a 16 byte boundary
436 * this will result in a 16 byte aligned IP header after
437 * the 14 byte MAC header is removed
439 skb_reserve(skb, NET_IP_ALIGN);
444 bi->dma = pci_map_single(pdev, skb->data,
448 /* Refresh the desc even if buffer_addrs didn't change because
449 * each write-back erases this info. */
450 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
451 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
452 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
454 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
458 if (i == rx_ring->count)
460 bi = &rx_ring->rx_buffer_info[i];
464 if (rx_ring->next_to_use != i) {
465 rx_ring->next_to_use = i;
467 i = (rx_ring->count - 1);
469 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
473 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
477 struct ixgbe_hw *hw = &adapter->hw;
479 mask = (qmask & 0xFFFFFFFF);
480 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask);
483 static inline u16 ixgbevf_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
485 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
488 static inline u16 ixgbevf_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
490 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
493 static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
494 struct ixgbevf_ring *rx_ring,
495 int *work_done, int work_to_do)
497 struct ixgbevf_adapter *adapter = q_vector->adapter;
498 struct pci_dev *pdev = adapter->pdev;
499 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
500 struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
505 bool cleaned = false;
506 int cleaned_count = 0;
507 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
509 i = rx_ring->next_to_clean;
510 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
511 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
512 rx_buffer_info = &rx_ring->rx_buffer_info[i];
514 while (staterr & IXGBE_RXD_STAT_DD) {
516 if (*work_done >= work_to_do)
520 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
521 hdr_info = le16_to_cpu(ixgbevf_get_hdr_info(rx_desc));
522 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
523 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
524 if (hdr_info & IXGBE_RXDADV_SPH)
525 adapter->rx_hdr_split++;
526 if (len > IXGBEVF_RX_HDR_SIZE)
527 len = IXGBEVF_RX_HDR_SIZE;
528 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
530 len = le16_to_cpu(rx_desc->wb.upper.length);
533 skb = rx_buffer_info->skb;
534 prefetch(skb->data - NET_IP_ALIGN);
535 rx_buffer_info->skb = NULL;
537 if (rx_buffer_info->dma) {
538 pci_unmap_single(pdev, rx_buffer_info->dma,
541 rx_buffer_info->dma = 0;
546 pci_unmap_page(pdev, rx_buffer_info->page_dma,
547 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
548 rx_buffer_info->page_dma = 0;
549 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
550 rx_buffer_info->page,
551 rx_buffer_info->page_offset,
554 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
555 (page_count(rx_buffer_info->page) != 1))
556 rx_buffer_info->page = NULL;
558 get_page(rx_buffer_info->page);
560 skb->len += upper_len;
561 skb->data_len += upper_len;
562 skb->truesize += upper_len;
566 if (i == rx_ring->count)
569 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
573 next_buffer = &rx_ring->rx_buffer_info[i];
575 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
576 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
577 rx_buffer_info->skb = next_buffer->skb;
578 rx_buffer_info->dma = next_buffer->dma;
579 next_buffer->skb = skb;
580 next_buffer->dma = 0;
582 skb->next = next_buffer->skb;
583 skb->next->prev = skb;
585 adapter->non_eop_descs++;
589 /* ERR_MASK will only have valid bits if EOP set */
590 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
591 dev_kfree_skb_irq(skb);
595 ixgbevf_rx_checksum(adapter, staterr, skb);
597 /* probably a little skewed due to removing CRC */
598 total_rx_bytes += skb->len;
602 * Work around issue of some types of VM to VM loop back
603 * packets not getting split correctly
605 if (staterr & IXGBE_RXD_STAT_LB) {
606 u32 header_fixup_len = skb->len - skb->data_len;
607 if (header_fixup_len < 14)
608 skb_push(skb, header_fixup_len);
610 skb->protocol = eth_type_trans(skb, adapter->netdev);
612 ixgbevf_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
613 adapter->netdev->last_rx = jiffies;
616 rx_desc->wb.upper.status_error = 0;
618 /* return some buffers to hardware, one at a time is too slow */
619 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
620 ixgbevf_alloc_rx_buffers(adapter, rx_ring,
625 /* use prefetched values */
627 rx_buffer_info = &rx_ring->rx_buffer_info[i];
629 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
632 rx_ring->next_to_clean = i;
633 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
636 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
638 rx_ring->total_packets += total_rx_packets;
639 rx_ring->total_bytes += total_rx_bytes;
640 adapter->net_stats.rx_bytes += total_rx_bytes;
641 adapter->net_stats.rx_packets += total_rx_packets;
647 * ixgbevf_clean_rxonly - msix (aka one shot) rx clean routine
648 * @napi: napi struct with our devices info in it
649 * @budget: amount of work driver is allowed to do this pass, in packets
651 * This function is optimized for cleaning one queue only on a single
654 static int ixgbevf_clean_rxonly(struct napi_struct *napi, int budget)
656 struct ixgbevf_q_vector *q_vector =
657 container_of(napi, struct ixgbevf_q_vector, napi);
658 struct ixgbevf_adapter *adapter = q_vector->adapter;
659 struct ixgbevf_ring *rx_ring = NULL;
663 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
664 rx_ring = &(adapter->rx_ring[r_idx]);
666 ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
668 /* If all Rx work done, exit the polling mode */
669 if (work_done < budget) {
671 if (adapter->itr_setting & 1)
672 ixgbevf_set_itr_msix(q_vector);
673 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
674 ixgbevf_irq_enable_queues(adapter, rx_ring->v_idx);
681 * ixgbevf_clean_rxonly_many - msix (aka one shot) rx clean routine
682 * @napi: napi struct with our devices info in it
683 * @budget: amount of work driver is allowed to do this pass, in packets
685 * This function will clean more than one rx queue associated with a
688 static int ixgbevf_clean_rxonly_many(struct napi_struct *napi, int budget)
690 struct ixgbevf_q_vector *q_vector =
691 container_of(napi, struct ixgbevf_q_vector, napi);
692 struct ixgbevf_adapter *adapter = q_vector->adapter;
693 struct ixgbevf_ring *rx_ring = NULL;
694 int work_done = 0, i;
698 /* attempt to distribute budget to each queue fairly, but don't allow
699 * the budget to go below 1 because we'll exit polling */
700 budget /= (q_vector->rxr_count ?: 1);
701 budget = max(budget, 1);
702 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
703 for (i = 0; i < q_vector->rxr_count; i++) {
704 rx_ring = &(adapter->rx_ring[r_idx]);
705 ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
706 enable_mask |= rx_ring->v_idx;
707 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
711 #ifndef HAVE_NETDEV_NAPI_LIST
712 if (!netif_running(adapter->netdev))
716 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
717 rx_ring = &(adapter->rx_ring[r_idx]);
719 /* If all Rx work done, exit the polling mode */
720 if (work_done < budget) {
722 if (adapter->itr_setting & 1)
723 ixgbevf_set_itr_msix(q_vector);
724 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
725 ixgbevf_irq_enable_queues(adapter, enable_mask);
733 * ixgbevf_configure_msix - Configure MSI-X hardware
734 * @adapter: board private structure
736 * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
739 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
741 struct ixgbevf_q_vector *q_vector;
742 struct ixgbe_hw *hw = &adapter->hw;
743 int i, j, q_vectors, v_idx, r_idx;
746 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
749 * Populate the IVAR table and set the ITR values to the
750 * corresponding register.
752 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
753 q_vector = adapter->q_vector[v_idx];
754 /* XXX for_each_bit(...) */
755 r_idx = find_first_bit(q_vector->rxr_idx,
756 adapter->num_rx_queues);
758 for (i = 0; i < q_vector->rxr_count; i++) {
759 j = adapter->rx_ring[r_idx].reg_idx;
760 ixgbevf_set_ivar(adapter, 0, j, v_idx);
761 r_idx = find_next_bit(q_vector->rxr_idx,
762 adapter->num_rx_queues,
765 r_idx = find_first_bit(q_vector->txr_idx,
766 adapter->num_tx_queues);
768 for (i = 0; i < q_vector->txr_count; i++) {
769 j = adapter->tx_ring[r_idx].reg_idx;
770 ixgbevf_set_ivar(adapter, 1, j, v_idx);
771 r_idx = find_next_bit(q_vector->txr_idx,
772 adapter->num_tx_queues,
776 /* if this is a tx only vector halve the interrupt rate */
777 if (q_vector->txr_count && !q_vector->rxr_count)
778 q_vector->eitr = (adapter->eitr_param >> 1);
779 else if (q_vector->rxr_count)
781 q_vector->eitr = adapter->eitr_param;
783 ixgbevf_write_eitr(adapter, v_idx, q_vector->eitr);
786 ixgbevf_set_ivar(adapter, -1, 1, v_idx);
788 /* set up to autoclear timer, and the vectors */
789 mask = IXGBE_EIMS_ENABLE_MASK;
790 mask &= ~IXGBE_EIMS_OTHER;
791 IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, mask);
798 latency_invalid = 255
802 * ixgbevf_update_itr - update the dynamic ITR value based on statistics
803 * @adapter: pointer to adapter
804 * @eitr: eitr setting (ints per sec) to give last timeslice
805 * @itr_setting: current throttle rate in ints/second
806 * @packets: the number of packets during this measurement interval
807 * @bytes: the number of bytes during this measurement interval
809 * Stores a new ITR value based on packets and byte
810 * counts during the last interrupt. The advantage of per interrupt
811 * computation is faster updates and more accurate ITR for the current
812 * traffic pattern. Constants in this function were computed
813 * based on theoretical maximum wire speed and thresholds were set based
814 * on testing data as well as attempting to minimize response time
815 * while increasing bulk throughput.
817 static u8 ixgbevf_update_itr(struct ixgbevf_adapter *adapter,
818 u32 eitr, u8 itr_setting,
819 int packets, int bytes)
821 unsigned int retval = itr_setting;
826 goto update_itr_done;
829 /* simple throttlerate management
830 * 0-20MB/s lowest (100000 ints/s)
831 * 20-100MB/s low (20000 ints/s)
832 * 100-1249MB/s bulk (8000 ints/s)
834 /* what was last interrupt timeslice? */
835 timepassed_us = 1000000/eitr;
836 bytes_perint = bytes / timepassed_us; /* bytes/usec */
838 switch (itr_setting) {
840 if (bytes_perint > adapter->eitr_low)
841 retval = low_latency;
844 if (bytes_perint > adapter->eitr_high)
845 retval = bulk_latency;
846 else if (bytes_perint <= adapter->eitr_low)
847 retval = lowest_latency;
850 if (bytes_perint <= adapter->eitr_high)
851 retval = low_latency;
860 * ixgbevf_write_eitr - write VTEITR register in hardware specific way
861 * @adapter: pointer to adapter struct
862 * @v_idx: vector index into q_vector array
863 * @itr_reg: new value to be written in *register* format, not ints/s
865 * This function is made to be called by ethtool and by the driver
866 * when it needs to update VTEITR registers at runtime. Hardware
867 * specific quirks/differences are taken care of here.
869 static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx,
872 struct ixgbe_hw *hw = &adapter->hw;
874 itr_reg = EITR_INTS_PER_SEC_TO_REG(itr_reg);
877 * set the WDIS bit to not clear the timer bits and cause an
878 * immediate assertion of the interrupt
880 itr_reg |= IXGBE_EITR_CNT_WDIS;
882 IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
885 static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector)
887 struct ixgbevf_adapter *adapter = q_vector->adapter;
889 u8 current_itr, ret_itr;
890 int i, r_idx, v_idx = q_vector->v_idx;
891 struct ixgbevf_ring *rx_ring, *tx_ring;
893 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
894 for (i = 0; i < q_vector->txr_count; i++) {
895 tx_ring = &(adapter->tx_ring[r_idx]);
896 ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr,
898 tx_ring->total_packets,
899 tx_ring->total_bytes);
900 /* if the result for this queue would decrease interrupt
901 * rate for this vector then use that result */
902 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
903 q_vector->tx_itr - 1 : ret_itr);
904 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
908 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
909 for (i = 0; i < q_vector->rxr_count; i++) {
910 rx_ring = &(adapter->rx_ring[r_idx]);
911 ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr,
913 rx_ring->total_packets,
914 rx_ring->total_bytes);
915 /* if the result for this queue would decrease interrupt
916 * rate for this vector then use that result */
917 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
918 q_vector->rx_itr - 1 : ret_itr);
919 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
923 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
925 switch (current_itr) {
926 /* counts and packets in update_itr are dependent on these numbers */
931 new_itr = 20000; /* aka hwitr = ~200 */
939 if (new_itr != q_vector->eitr) {
942 /* save the algorithm value here, not the smoothed one */
943 q_vector->eitr = new_itr;
944 /* do an exponential smoothing */
945 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
946 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
947 ixgbevf_write_eitr(adapter, v_idx, itr_reg);
953 static irqreturn_t ixgbevf_msix_mbx(int irq, void *data)
955 struct net_device *netdev = data;
956 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
957 struct ixgbe_hw *hw = &adapter->hw;
960 eicr = IXGBE_READ_REG(hw, IXGBE_VTEICS);
961 IXGBE_WRITE_REG(hw, IXGBE_VTEICR, eicr);
966 static irqreturn_t ixgbevf_msix_clean_tx(int irq, void *data)
968 struct ixgbevf_q_vector *q_vector = data;
969 struct ixgbevf_adapter *adapter = q_vector->adapter;
970 struct ixgbevf_ring *tx_ring;
973 if (!q_vector->txr_count)
976 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
977 for (i = 0; i < q_vector->txr_count; i++) {
978 tx_ring = &(adapter->tx_ring[r_idx]);
979 tx_ring->total_bytes = 0;
980 tx_ring->total_packets = 0;
981 ixgbevf_clean_tx_irq(adapter, tx_ring);
982 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
986 if (adapter->itr_setting & 1)
987 ixgbevf_set_itr_msix(q_vector);
993 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
995 * @data: pointer to our q_vector struct for this interrupt vector
997 static irqreturn_t ixgbevf_msix_clean_rx(int irq, void *data)
999 struct ixgbevf_q_vector *q_vector = data;
1000 struct ixgbevf_adapter *adapter = q_vector->adapter;
1001 struct ixgbe_hw *hw = &adapter->hw;
1002 struct ixgbevf_ring *rx_ring;
1006 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1007 for (i = 0; i < q_vector->rxr_count; i++) {
1008 rx_ring = &(adapter->rx_ring[r_idx]);
1009 rx_ring->total_bytes = 0;
1010 rx_ring->total_packets = 0;
1011 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1015 if (!q_vector->rxr_count)
1018 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1019 rx_ring = &(adapter->rx_ring[r_idx]);
1020 /* disable interrupts on this vector only */
1021 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, rx_ring->v_idx);
1022 napi_schedule(&q_vector->napi);
1028 static irqreturn_t ixgbevf_msix_clean_many(int irq, void *data)
1030 ixgbevf_msix_clean_rx(irq, data);
1031 ixgbevf_msix_clean_tx(irq, data);
1036 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
1039 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1041 set_bit(r_idx, q_vector->rxr_idx);
1042 q_vector->rxr_count++;
1043 a->rx_ring[r_idx].v_idx = 1 << v_idx;
1046 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
1049 struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1051 set_bit(t_idx, q_vector->txr_idx);
1052 q_vector->txr_count++;
1053 a->tx_ring[t_idx].v_idx = 1 << v_idx;
1057 * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1058 * @adapter: board private structure to initialize
1060 * This function maps descriptor rings to the queue-specific vectors
1061 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1062 * one vector per ring/queue, but on a constrained vector budget, we
1063 * group the rings as "efficiently" as possible. You would add new
1064 * mapping configurations in here.
1066 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
1070 int rxr_idx = 0, txr_idx = 0;
1071 int rxr_remaining = adapter->num_rx_queues;
1072 int txr_remaining = adapter->num_tx_queues;
1077 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1080 * The ideal configuration...
1081 * We have enough vectors to map one per queue.
1083 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1084 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1085 map_vector_to_rxq(adapter, v_start, rxr_idx);
1087 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1088 map_vector_to_txq(adapter, v_start, txr_idx);
1093 * If we don't have enough vectors for a 1-to-1
1094 * mapping, we'll have to group them so there are
1095 * multiple queues per vector.
1097 /* Re-adjusting *qpv takes care of the remainder. */
1098 for (i = v_start; i < q_vectors; i++) {
1099 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
1100 for (j = 0; j < rqpv; j++) {
1101 map_vector_to_rxq(adapter, i, rxr_idx);
1106 for (i = v_start; i < q_vectors; i++) {
1107 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
1108 for (j = 0; j < tqpv; j++) {
1109 map_vector_to_txq(adapter, i, txr_idx);
1120 * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1121 * @adapter: board private structure
1123 * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1124 * interrupts from the kernel.
1126 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1128 struct net_device *netdev = adapter->netdev;
1129 irqreturn_t (*handler)(int, void *);
1130 int i, vector, q_vectors, err;
1133 /* Decrement for Other and TCP Timer vectors */
1134 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1136 #define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count) \
1137 ? &ixgbevf_msix_clean_many : \
1138 (_v)->rxr_count ? &ixgbevf_msix_clean_rx : \
1139 (_v)->txr_count ? &ixgbevf_msix_clean_tx : \
1141 for (vector = 0; vector < q_vectors; vector++) {
1142 handler = SET_HANDLER(adapter->q_vector[vector]);
1144 if (handler == &ixgbevf_msix_clean_rx) {
1145 sprintf(adapter->name[vector], "%s-%s-%d",
1146 netdev->name, "rx", ri++);
1147 } else if (handler == &ixgbevf_msix_clean_tx) {
1148 sprintf(adapter->name[vector], "%s-%s-%d",
1149 netdev->name, "tx", ti++);
1150 } else if (handler == &ixgbevf_msix_clean_many) {
1151 sprintf(adapter->name[vector], "%s-%s-%d",
1152 netdev->name, "TxRx", vector);
1154 /* skip this unused q_vector */
1157 err = request_irq(adapter->msix_entries[vector].vector,
1158 handler, 0, adapter->name[vector],
1159 adapter->q_vector[vector]);
1161 hw_dbg(&adapter->hw,
1162 "request_irq failed for MSIX interrupt "
1163 "Error: %d\n", err);
1164 goto free_queue_irqs;
1168 sprintf(adapter->name[vector], "%s:mbx", netdev->name);
1169 err = request_irq(adapter->msix_entries[vector].vector,
1170 &ixgbevf_msix_mbx, 0, adapter->name[vector], netdev);
1172 hw_dbg(&adapter->hw,
1173 "request_irq for msix_mbx failed: %d\n", err);
1174 goto free_queue_irqs;
1180 for (i = vector - 1; i >= 0; i--)
1181 free_irq(adapter->msix_entries[--vector].vector,
1182 &(adapter->q_vector[i]));
1183 pci_disable_msix(adapter->pdev);
1184 kfree(adapter->msix_entries);
1185 adapter->msix_entries = NULL;
1189 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1191 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1193 for (i = 0; i < q_vectors; i++) {
1194 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1195 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1196 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1197 q_vector->rxr_count = 0;
1198 q_vector->txr_count = 0;
1199 q_vector->eitr = adapter->eitr_param;
1204 * ixgbevf_request_irq - initialize interrupts
1205 * @adapter: board private structure
1207 * Attempts to configure interrupts using the best available
1208 * capabilities of the hardware and kernel.
1210 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1214 err = ixgbevf_request_msix_irqs(adapter);
1217 hw_dbg(&adapter->hw,
1218 "request_irq failed, Error %d\n", err);
1223 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1225 struct net_device *netdev = adapter->netdev;
1228 q_vectors = adapter->num_msix_vectors;
1232 free_irq(adapter->msix_entries[i].vector, netdev);
1235 for (; i >= 0; i--) {
1236 free_irq(adapter->msix_entries[i].vector,
1237 adapter->q_vector[i]);
1240 ixgbevf_reset_q_vectors(adapter);
1244 * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1245 * @adapter: board private structure
1247 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1250 struct ixgbe_hw *hw = &adapter->hw;
1252 IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1254 IXGBE_WRITE_FLUSH(hw);
1256 for (i = 0; i < adapter->num_msix_vectors; i++)
1257 synchronize_irq(adapter->msix_entries[i].vector);
1261 * ixgbevf_irq_enable - Enable default interrupt generation settings
1262 * @adapter: board private structure
1264 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter,
1265 bool queues, bool flush)
1267 struct ixgbe_hw *hw = &adapter->hw;
1271 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1274 IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask);
1277 ixgbevf_irq_enable_queues(adapter, qmask);
1280 IXGBE_WRITE_FLUSH(hw);
1284 * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1285 * @adapter: board private structure
1287 * Configure the Tx unit of the MAC after a reset.
1289 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1292 struct ixgbe_hw *hw = &adapter->hw;
1293 u32 i, j, tdlen, txctrl;
1295 /* Setup the HW Tx Head and Tail descriptor pointers */
1296 for (i = 0; i < adapter->num_tx_queues; i++) {
1297 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1300 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1301 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1302 (tdba & DMA_BIT_MASK(32)));
1303 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1304 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1305 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1306 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1307 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1308 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1309 /* Disable Tx Head Writeback RO bit, since this hoses
1310 * bookkeeping if things aren't delivered in order.
1312 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1313 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1314 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1318 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1320 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1322 struct ixgbevf_ring *rx_ring;
1323 struct ixgbe_hw *hw = &adapter->hw;
1326 rx_ring = &adapter->rx_ring[index];
1328 srrctl = IXGBE_SRRCTL_DROP_EN;
1330 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1331 u16 bufsz = IXGBEVF_RXBUFFER_2048;
1332 /* grow the amount we can receive on large page machines */
1333 if (bufsz < (PAGE_SIZE / 2))
1334 bufsz = (PAGE_SIZE / 2);
1335 /* cap the bufsz at our largest descriptor size */
1336 bufsz = min((u16)IXGBEVF_MAX_RXBUFFER, bufsz);
1338 srrctl |= bufsz >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1339 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1340 srrctl |= ((IXGBEVF_RX_HDR_SIZE <<
1341 IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1342 IXGBE_SRRCTL_BSIZEHDR_MASK);
1344 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1346 if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1347 srrctl |= IXGBEVF_RXBUFFER_2048 >>
1348 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1350 srrctl |= rx_ring->rx_buf_len >>
1351 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1353 IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1357 * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1358 * @adapter: board private structure
1360 * Configure the Rx unit of the MAC after a reset.
1362 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1365 struct ixgbe_hw *hw = &adapter->hw;
1366 struct net_device *netdev = adapter->netdev;
1367 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1372 /* Decide whether to use packet split mode or not */
1373 if (netdev->mtu > ETH_DATA_LEN) {
1374 if (adapter->flags & IXGBE_FLAG_RX_PS_CAPABLE)
1375 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1377 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1379 if (adapter->flags & IXGBE_FLAG_RX_1BUF_CAPABLE)
1380 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1382 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1385 /* Set the RX buffer length according to the mode */
1386 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1387 /* PSRTYPE must be initialized in 82599 */
1388 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
1389 IXGBE_PSRTYPE_UDPHDR |
1390 IXGBE_PSRTYPE_IPV4HDR |
1391 IXGBE_PSRTYPE_IPV6HDR |
1392 IXGBE_PSRTYPE_L2HDR;
1393 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1394 rx_buf_len = IXGBEVF_RX_HDR_SIZE;
1396 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0);
1397 if (netdev->mtu <= ETH_DATA_LEN)
1398 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1400 rx_buf_len = ALIGN(max_frame, 1024);
1403 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1404 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1405 * the Base and Length of the Rx Descriptor Ring */
1406 for (i = 0; i < adapter->num_rx_queues; i++) {
1407 rdba = adapter->rx_ring[i].dma;
1408 j = adapter->rx_ring[i].reg_idx;
1409 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1410 (rdba & DMA_BIT_MASK(32)));
1411 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1412 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1413 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1414 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1415 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1416 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1417 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1419 ixgbevf_configure_srrctl(adapter, j);
1423 static void ixgbevf_vlan_rx_register(struct net_device *netdev,
1424 struct vlan_group *grp)
1426 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1427 struct ixgbe_hw *hw = &adapter->hw;
1431 adapter->vlgrp = grp;
1433 for (i = 0; i < adapter->num_rx_queues; i++) {
1434 j = adapter->rx_ring[i].reg_idx;
1435 ctrl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1436 ctrl |= IXGBE_RXDCTL_VME;
1437 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), ctrl);
1441 static void ixgbevf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1443 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1444 struct ixgbe_hw *hw = &adapter->hw;
1445 struct net_device *v_netdev;
1447 /* add VID to filter table */
1448 if (hw->mac.ops.set_vfta)
1449 hw->mac.ops.set_vfta(hw, vid, 0, true);
1451 * Copy feature flags from netdev to the vlan netdev for this vid.
1452 * This allows things like TSO to bubble down to our vlan device.
1454 v_netdev = vlan_group_get_device(adapter->vlgrp, vid);
1455 v_netdev->features |= adapter->netdev->features;
1456 vlan_group_set_device(adapter->vlgrp, vid, v_netdev);
1459 static void ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1461 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1462 struct ixgbe_hw *hw = &adapter->hw;
1464 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
1465 ixgbevf_irq_disable(adapter);
1467 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1469 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
1470 ixgbevf_irq_enable(adapter, true, true);
1472 /* remove VID from filter table */
1473 if (hw->mac.ops.set_vfta)
1474 hw->mac.ops.set_vfta(hw, vid, 0, false);
1477 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1479 ixgbevf_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1481 if (adapter->vlgrp) {
1483 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1484 if (!vlan_group_get_device(adapter->vlgrp, vid))
1486 ixgbevf_vlan_rx_add_vid(adapter->netdev, vid);
1491 static u8 *ixgbevf_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr,
1494 struct dev_mc_list *mc_ptr;
1495 u8 *addr = *mc_addr_ptr;
1498 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
1500 *mc_addr_ptr = mc_ptr->next->dmi_addr;
1502 *mc_addr_ptr = NULL;
1508 * ixgbevf_set_rx_mode - Multicast set
1509 * @netdev: network interface device structure
1511 * The set_rx_method entry point is called whenever the multicast address
1512 * list or the network interface flags are updated. This routine is
1513 * responsible for configuring the hardware for proper multicast mode.
1515 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1517 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1518 struct ixgbe_hw *hw = &adapter->hw;
1519 u8 *addr_list = NULL;
1522 /* reprogram multicast list */
1523 addr_count = netdev->mc_count;
1525 addr_list = netdev->mc_list->dmi_addr;
1526 if (hw->mac.ops.update_mc_addr_list)
1527 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
1528 ixgbevf_addr_list_itr);
1531 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1534 struct ixgbevf_q_vector *q_vector;
1535 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1537 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1538 struct napi_struct *napi;
1539 q_vector = adapter->q_vector[q_idx];
1540 if (!q_vector->rxr_count)
1542 napi = &q_vector->napi;
1543 if (q_vector->rxr_count > 1)
1544 napi->poll = &ixgbevf_clean_rxonly_many;
1550 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1553 struct ixgbevf_q_vector *q_vector;
1554 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1556 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1557 q_vector = adapter->q_vector[q_idx];
1558 if (!q_vector->rxr_count)
1560 napi_disable(&q_vector->napi);
1564 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1566 struct net_device *netdev = adapter->netdev;
1569 ixgbevf_set_rx_mode(netdev);
1571 ixgbevf_restore_vlan(adapter);
1573 ixgbevf_configure_tx(adapter);
1574 ixgbevf_configure_rx(adapter);
1575 for (i = 0; i < adapter->num_rx_queues; i++) {
1576 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1577 ixgbevf_alloc_rx_buffers(adapter, ring, ring->count);
1578 ring->next_to_use = ring->count - 1;
1579 writel(ring->next_to_use, adapter->hw.hw_addr + ring->tail);
1583 #define IXGBE_MAX_RX_DESC_POLL 10
1584 static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1587 struct ixgbe_hw *hw = &adapter->hw;
1588 int j = adapter->rx_ring[rxr].reg_idx;
1591 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
1592 if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
1597 if (k >= IXGBE_MAX_RX_DESC_POLL) {
1598 hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d "
1599 "not set within the polling period\n", rxr);
1602 ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1603 (adapter->rx_ring[rxr].count - 1));
1606 static int ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1608 struct net_device *netdev = adapter->netdev;
1609 struct ixgbe_hw *hw = &adapter->hw;
1611 int num_rx_rings = adapter->num_rx_queues;
1614 for (i = 0; i < adapter->num_tx_queues; i++) {
1615 j = adapter->tx_ring[i].reg_idx;
1616 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1617 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1618 txdctl |= (8 << 16);
1619 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1622 for (i = 0; i < adapter->num_tx_queues; i++) {
1623 j = adapter->tx_ring[i].reg_idx;
1624 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1625 txdctl |= IXGBE_TXDCTL_ENABLE;
1626 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1629 for (i = 0; i < num_rx_rings; i++) {
1630 j = adapter->rx_ring[i].reg_idx;
1631 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1632 rxdctl |= IXGBE_RXDCTL_ENABLE;
1633 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1634 ixgbevf_rx_desc_queue_enable(adapter, i);
1637 ixgbevf_configure_msix(adapter);
1639 if (hw->mac.ops.set_rar) {
1640 if (is_valid_ether_addr(hw->mac.addr))
1641 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1643 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1646 clear_bit(__IXGBEVF_DOWN, &adapter->state);
1647 ixgbevf_napi_enable_all(adapter);
1649 /* enable transmits */
1650 netif_tx_start_all_queues(netdev);
1652 /* bring the link up in the watchdog, this could race with our first
1653 * link up interrupt but shouldn't be a problem */
1654 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1655 adapter->link_check_timeout = jiffies;
1656 mod_timer(&adapter->watchdog_timer, jiffies);
1660 int ixgbevf_up(struct ixgbevf_adapter *adapter)
1663 struct ixgbe_hw *hw = &adapter->hw;
1665 ixgbevf_configure(adapter);
1667 err = ixgbevf_up_complete(adapter);
1669 /* clear any pending interrupts, may auto mask */
1670 IXGBE_READ_REG(hw, IXGBE_VTEICR);
1672 ixgbevf_irq_enable(adapter, true, true);
1678 * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1679 * @adapter: board private structure
1680 * @rx_ring: ring to free buffers from
1682 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1683 struct ixgbevf_ring *rx_ring)
1685 struct pci_dev *pdev = adapter->pdev;
1689 /* Free all the Rx ring sk_buffs */
1691 for (i = 0; i < rx_ring->count; i++) {
1692 struct ixgbevf_rx_buffer *rx_buffer_info;
1694 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1695 if (rx_buffer_info->dma) {
1696 pci_unmap_single(pdev, rx_buffer_info->dma,
1697 rx_ring->rx_buf_len,
1698 PCI_DMA_FROMDEVICE);
1699 rx_buffer_info->dma = 0;
1701 if (rx_buffer_info->skb) {
1702 struct sk_buff *skb = rx_buffer_info->skb;
1703 rx_buffer_info->skb = NULL;
1705 struct sk_buff *this = skb;
1707 dev_kfree_skb(this);
1710 if (!rx_buffer_info->page)
1712 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
1713 PCI_DMA_FROMDEVICE);
1714 rx_buffer_info->page_dma = 0;
1715 put_page(rx_buffer_info->page);
1716 rx_buffer_info->page = NULL;
1717 rx_buffer_info->page_offset = 0;
1720 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1721 memset(rx_ring->rx_buffer_info, 0, size);
1723 /* Zero out the descriptor ring */
1724 memset(rx_ring->desc, 0, rx_ring->size);
1726 rx_ring->next_to_clean = 0;
1727 rx_ring->next_to_use = 0;
1730 writel(0, adapter->hw.hw_addr + rx_ring->head);
1732 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1736 * ixgbevf_clean_tx_ring - Free Tx Buffers
1737 * @adapter: board private structure
1738 * @tx_ring: ring to be cleaned
1740 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1741 struct ixgbevf_ring *tx_ring)
1743 struct ixgbevf_tx_buffer *tx_buffer_info;
1747 /* Free all the Tx ring sk_buffs */
1749 for (i = 0; i < tx_ring->count; i++) {
1750 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1751 ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1754 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1755 memset(tx_ring->tx_buffer_info, 0, size);
1757 memset(tx_ring->desc, 0, tx_ring->size);
1759 tx_ring->next_to_use = 0;
1760 tx_ring->next_to_clean = 0;
1763 writel(0, adapter->hw.hw_addr + tx_ring->head);
1765 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1769 * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1770 * @adapter: board private structure
1772 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1776 for (i = 0; i < adapter->num_rx_queues; i++)
1777 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1781 * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1782 * @adapter: board private structure
1784 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1788 for (i = 0; i < adapter->num_tx_queues; i++)
1789 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1792 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1794 struct net_device *netdev = adapter->netdev;
1795 struct ixgbe_hw *hw = &adapter->hw;
1799 /* signal that we are down to the interrupt handler */
1800 set_bit(__IXGBEVF_DOWN, &adapter->state);
1801 /* disable receives */
1803 netif_tx_disable(netdev);
1807 netif_tx_stop_all_queues(netdev);
1809 ixgbevf_irq_disable(adapter);
1811 ixgbevf_napi_disable_all(adapter);
1813 del_timer_sync(&adapter->watchdog_timer);
1814 /* can't call flush scheduled work here because it can deadlock
1815 * if linkwatch_event tries to acquire the rtnl_lock which we are
1817 while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1820 /* disable transmits in the hardware now that interrupts are off */
1821 for (i = 0; i < adapter->num_tx_queues; i++) {
1822 j = adapter->tx_ring[i].reg_idx;
1823 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1824 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1825 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1828 netif_carrier_off(netdev);
1830 if (!pci_channel_offline(adapter->pdev))
1831 ixgbevf_reset(adapter);
1833 ixgbevf_clean_all_tx_rings(adapter);
1834 ixgbevf_clean_all_rx_rings(adapter);
1837 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1839 WARN_ON(in_interrupt());
1840 while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1843 ixgbevf_down(adapter);
1844 ixgbevf_up(adapter);
1846 clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1849 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1851 struct ixgbe_hw *hw = &adapter->hw;
1852 struct net_device *netdev = adapter->netdev;
1854 if (hw->mac.ops.reset_hw(hw))
1855 hw_dbg(hw, "PF still resetting\n");
1857 hw->mac.ops.init_hw(hw);
1859 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1860 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1862 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1867 static void ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1870 int err, vector_threshold;
1872 /* We'll want at least 3 (vector_threshold):
1875 * 3) Other (Link Status Change, etc.)
1877 vector_threshold = MIN_MSIX_COUNT;
1879 /* The more we get, the more we will assign to Tx/Rx Cleanup
1880 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1881 * Right now, we simply care about how many we'll get; we'll
1882 * set them up later while requesting irq's.
1884 while (vectors >= vector_threshold) {
1885 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1887 if (!err) /* Success in acquiring all requested vectors. */
1890 vectors = 0; /* Nasty failure, quit now */
1891 else /* err == number of vectors we should try again with */
1895 if (vectors < vector_threshold) {
1896 /* Can't allocate enough MSI-X interrupts? Oh well.
1897 * This just means we'll go with either a single MSI
1898 * vector or fall back to legacy interrupts.
1900 hw_dbg(&adapter->hw,
1901 "Unable to allocate MSI-X interrupts\n");
1902 kfree(adapter->msix_entries);
1903 adapter->msix_entries = NULL;
1906 * Adjust for only the vectors we'll use, which is minimum
1907 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1908 * vectors we were allocated.
1910 adapter->num_msix_vectors = vectors;
1915 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
1916 * @adapter: board private structure to initialize
1918 * This is the top level queue allocation routine. The order here is very
1919 * important, starting with the "most" number of features turned on at once,
1920 * and ending with the smallest set of features. This way large combinations
1921 * can be allocated if they're turned on, and smaller combinations are the
1922 * fallthrough conditions.
1925 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1927 /* Start with base case */
1928 adapter->num_rx_queues = 1;
1929 adapter->num_tx_queues = 1;
1930 adapter->num_rx_pools = adapter->num_rx_queues;
1931 adapter->num_rx_queues_per_pool = 1;
1935 * ixgbevf_alloc_queues - Allocate memory for all rings
1936 * @adapter: board private structure to initialize
1938 * We allocate one ring per queue at run-time since we don't know the
1939 * number of queues at compile-time. The polling_netdev array is
1940 * intended for Multiqueue, but should work fine with a single queue.
1942 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1946 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1947 sizeof(struct ixgbevf_ring), GFP_KERNEL);
1948 if (!adapter->tx_ring)
1949 goto err_tx_ring_allocation;
1951 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1952 sizeof(struct ixgbevf_ring), GFP_KERNEL);
1953 if (!adapter->rx_ring)
1954 goto err_rx_ring_allocation;
1956 for (i = 0; i < adapter->num_tx_queues; i++) {
1957 adapter->tx_ring[i].count = adapter->tx_ring_count;
1958 adapter->tx_ring[i].queue_index = i;
1959 adapter->tx_ring[i].reg_idx = i;
1962 for (i = 0; i < adapter->num_rx_queues; i++) {
1963 adapter->rx_ring[i].count = adapter->rx_ring_count;
1964 adapter->rx_ring[i].queue_index = i;
1965 adapter->rx_ring[i].reg_idx = i;
1970 err_rx_ring_allocation:
1971 kfree(adapter->tx_ring);
1972 err_tx_ring_allocation:
1977 * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1978 * @adapter: board private structure to initialize
1980 * Attempt to configure the interrupts using the best available
1981 * capabilities of the hardware and the kernel.
1983 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1986 int vector, v_budget;
1989 * It's easy to be greedy for MSI-X vectors, but it really
1990 * doesn't do us much good if we have a lot more vectors
1991 * than CPU's. So let's be conservative and only ask for
1992 * (roughly) twice the number of vectors as there are CPU's.
1994 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
1995 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
1997 /* A failure in MSI-X entry allocation isn't fatal, but it does
1998 * mean we disable MSI-X capabilities of the adapter. */
1999 adapter->msix_entries = kcalloc(v_budget,
2000 sizeof(struct msix_entry), GFP_KERNEL);
2001 if (!adapter->msix_entries) {
2006 for (vector = 0; vector < v_budget; vector++)
2007 adapter->msix_entries[vector].entry = vector;
2009 ixgbevf_acquire_msix_vectors(adapter, v_budget);
2016 * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2017 * @adapter: board private structure to initialize
2019 * We allocate one q_vector per queue interrupt. If allocation fails we
2022 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2024 int q_idx, num_q_vectors;
2025 struct ixgbevf_q_vector *q_vector;
2027 int (*poll)(struct napi_struct *, int);
2029 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2030 napi_vectors = adapter->num_rx_queues;
2031 poll = &ixgbevf_clean_rxonly;
2033 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2034 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2037 q_vector->adapter = adapter;
2038 q_vector->v_idx = q_idx;
2039 q_vector->eitr = adapter->eitr_param;
2040 if (q_idx < napi_vectors)
2041 netif_napi_add(adapter->netdev, &q_vector->napi,
2043 adapter->q_vector[q_idx] = q_vector;
2051 q_vector = adapter->q_vector[q_idx];
2052 netif_napi_del(&q_vector->napi);
2054 adapter->q_vector[q_idx] = NULL;
2060 * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2061 * @adapter: board private structure to initialize
2063 * This function frees the memory allocated to the q_vectors. In addition if
2064 * NAPI is enabled it will delete any references to the NAPI struct prior
2065 * to freeing the q_vector.
2067 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2069 int q_idx, num_q_vectors;
2072 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2073 napi_vectors = adapter->num_rx_queues;
2075 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2076 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2078 adapter->q_vector[q_idx] = NULL;
2079 if (q_idx < napi_vectors)
2080 netif_napi_del(&q_vector->napi);
2086 * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2087 * @adapter: board private structure
2090 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2092 pci_disable_msix(adapter->pdev);
2093 kfree(adapter->msix_entries);
2094 adapter->msix_entries = NULL;
2100 * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2101 * @adapter: board private structure to initialize
2104 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2108 /* Number of supported queues */
2109 ixgbevf_set_num_queues(adapter);
2111 err = ixgbevf_set_interrupt_capability(adapter);
2113 hw_dbg(&adapter->hw,
2114 "Unable to setup interrupt capabilities\n");
2115 goto err_set_interrupt;
2118 err = ixgbevf_alloc_q_vectors(adapter);
2120 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2122 goto err_alloc_q_vectors;
2125 err = ixgbevf_alloc_queues(adapter);
2127 printk(KERN_ERR "Unable to allocate memory for queues\n");
2128 goto err_alloc_queues;
2131 hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2132 "Tx Queue count = %u\n",
2133 (adapter->num_rx_queues > 1) ? "Enabled" :
2134 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2136 set_bit(__IXGBEVF_DOWN, &adapter->state);
2140 ixgbevf_free_q_vectors(adapter);
2141 err_alloc_q_vectors:
2142 ixgbevf_reset_interrupt_capability(adapter);
2148 * ixgbevf_sw_init - Initialize general software structures
2149 * (struct ixgbevf_adapter)
2150 * @adapter: board private structure to initialize
2152 * ixgbevf_sw_init initializes the Adapter private data structure.
2153 * Fields are initialized based on PCI device information and
2154 * OS network device settings (MTU size).
2156 static int __devinit ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2158 struct ixgbe_hw *hw = &adapter->hw;
2159 struct pci_dev *pdev = adapter->pdev;
2162 /* PCI config space info */
2164 hw->vendor_id = pdev->vendor;
2165 hw->device_id = pdev->device;
2166 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2167 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2168 hw->subsystem_device_id = pdev->subsystem_device;
2170 hw->mbx.ops.init_params(hw);
2171 hw->mac.max_tx_queues = MAX_TX_QUEUES;
2172 hw->mac.max_rx_queues = MAX_RX_QUEUES;
2173 err = hw->mac.ops.reset_hw(hw);
2175 dev_info(&pdev->dev,
2176 "PF still in reset state, assigning new address\n");
2177 random_ether_addr(hw->mac.addr);
2179 err = hw->mac.ops.init_hw(hw);
2181 printk(KERN_ERR "init_shared_code failed: %d\n", err);
2186 /* Enable dynamic interrupt throttling rates */
2187 adapter->eitr_param = 20000;
2188 adapter->itr_setting = 1;
2190 /* set defaults for eitr in MegaBytes */
2191 adapter->eitr_low = 10;
2192 adapter->eitr_high = 20;
2194 /* set default ring sizes */
2195 adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2196 adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2198 /* enable rx csum by default */
2199 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
2201 set_bit(__IXGBEVF_DOWN, &adapter->state);
2207 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2209 struct ixgbe_hw *hw = &adapter->hw;
2211 adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2212 adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2213 adapter->stats.last_vfgorc |=
2214 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2215 adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2216 adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2217 adapter->stats.last_vfgotc |=
2218 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2219 adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2221 adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2222 adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2223 adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2224 adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2225 adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2228 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter) \
2230 u32 current_counter = IXGBE_READ_REG(hw, reg); \
2231 if (current_counter < last_counter) \
2232 counter += 0x100000000LL; \
2233 last_counter = current_counter; \
2234 counter &= 0xFFFFFFFF00000000LL; \
2235 counter |= current_counter; \
2238 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2240 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb); \
2241 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb); \
2242 u64 current_counter = (current_counter_msb << 32) | \
2243 current_counter_lsb; \
2244 if (current_counter < last_counter) \
2245 counter += 0x1000000000LL; \
2246 last_counter = current_counter; \
2247 counter &= 0xFFFFFFF000000000LL; \
2248 counter |= current_counter; \
2251 * ixgbevf_update_stats - Update the board statistics counters.
2252 * @adapter: board private structure
2254 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2256 struct ixgbe_hw *hw = &adapter->hw;
2258 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2259 adapter->stats.vfgprc);
2260 UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2261 adapter->stats.vfgptc);
2262 UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2263 adapter->stats.last_vfgorc,
2264 adapter->stats.vfgorc);
2265 UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2266 adapter->stats.last_vfgotc,
2267 adapter->stats.vfgotc);
2268 UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2269 adapter->stats.vfmprc);
2271 /* Fill out the OS statistics structure */
2272 adapter->net_stats.multicast = adapter->stats.vfmprc -
2273 adapter->stats.base_vfmprc;
2277 * ixgbevf_watchdog - Timer Call-back
2278 * @data: pointer to adapter cast into an unsigned long
2280 static void ixgbevf_watchdog(unsigned long data)
2282 struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2283 struct ixgbe_hw *hw = &adapter->hw;
2288 * Do the watchdog outside of interrupt context due to the lovely
2289 * delays that some of the newer hardware requires
2292 if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2293 goto watchdog_short_circuit;
2295 /* get one bit for every active tx/rx interrupt vector */
2296 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2297 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2298 if (qv->rxr_count || qv->txr_count)
2302 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, (u32)eics);
2304 watchdog_short_circuit:
2305 schedule_work(&adapter->watchdog_task);
2309 * ixgbevf_tx_timeout - Respond to a Tx Hang
2310 * @netdev: network interface device structure
2312 static void ixgbevf_tx_timeout(struct net_device *netdev)
2314 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2316 /* Do the reset outside of interrupt context */
2317 schedule_work(&adapter->reset_task);
2320 static void ixgbevf_reset_task(struct work_struct *work)
2322 struct ixgbevf_adapter *adapter;
2323 adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2325 /* If we're already down or resetting, just bail */
2326 if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2327 test_bit(__IXGBEVF_RESETTING, &adapter->state))
2330 adapter->tx_timeout_count++;
2332 ixgbevf_reinit_locked(adapter);
2336 * ixgbevf_watchdog_task - worker thread to bring link up
2337 * @work: pointer to work_struct containing our data
2339 static void ixgbevf_watchdog_task(struct work_struct *work)
2341 struct ixgbevf_adapter *adapter = container_of(work,
2342 struct ixgbevf_adapter,
2344 struct net_device *netdev = adapter->netdev;
2345 struct ixgbe_hw *hw = &adapter->hw;
2346 u32 link_speed = adapter->link_speed;
2347 bool link_up = adapter->link_up;
2349 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2352 * Always check the link on the watchdog because we have
2355 if (hw->mac.ops.check_link) {
2356 if ((hw->mac.ops.check_link(hw, &link_speed,
2357 &link_up, false)) != 0) {
2358 adapter->link_up = link_up;
2359 adapter->link_speed = link_speed;
2360 schedule_work(&adapter->reset_task);
2364 /* always assume link is up, if no check link
2366 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
2369 adapter->link_up = link_up;
2370 adapter->link_speed = link_speed;
2373 if (!netif_carrier_ok(netdev)) {
2374 hw_dbg(&adapter->hw, "NIC Link is Up %s, ",
2375 ((link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
2376 "10 Gbps" : "1 Gbps"));
2377 netif_carrier_on(netdev);
2378 netif_tx_wake_all_queues(netdev);
2380 /* Force detection of hung controller */
2381 adapter->detect_tx_hung = true;
2384 adapter->link_up = false;
2385 adapter->link_speed = 0;
2386 if (netif_carrier_ok(netdev)) {
2387 hw_dbg(&adapter->hw, "NIC Link is Down\n");
2388 netif_carrier_off(netdev);
2389 netif_tx_stop_all_queues(netdev);
2394 ixgbevf_update_stats(adapter);
2396 /* Force detection of hung controller every watchdog period */
2397 adapter->detect_tx_hung = true;
2399 /* Reset the timer */
2400 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2401 mod_timer(&adapter->watchdog_timer,
2402 round_jiffies(jiffies + (2 * HZ)));
2404 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2408 * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2409 * @adapter: board private structure
2410 * @tx_ring: Tx descriptor ring for a specific queue
2412 * Free all transmit software resources
2414 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2415 struct ixgbevf_ring *tx_ring)
2417 struct pci_dev *pdev = adapter->pdev;
2420 ixgbevf_clean_tx_ring(adapter, tx_ring);
2422 vfree(tx_ring->tx_buffer_info);
2423 tx_ring->tx_buffer_info = NULL;
2425 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2427 tx_ring->desc = NULL;
2431 * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2432 * @adapter: board private structure
2434 * Free all transmit software resources
2436 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2440 for (i = 0; i < adapter->num_tx_queues; i++)
2441 if (adapter->tx_ring[i].desc)
2442 ixgbevf_free_tx_resources(adapter,
2443 &adapter->tx_ring[i]);
2448 * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2449 * @adapter: board private structure
2450 * @tx_ring: tx descriptor ring (for a specific queue) to setup
2452 * Return 0 on success, negative on failure
2454 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2455 struct ixgbevf_ring *tx_ring)
2457 struct pci_dev *pdev = adapter->pdev;
2460 size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2461 tx_ring->tx_buffer_info = vmalloc(size);
2462 if (!tx_ring->tx_buffer_info)
2464 memset(tx_ring->tx_buffer_info, 0, size);
2466 /* round up to nearest 4K */
2467 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2468 tx_ring->size = ALIGN(tx_ring->size, 4096);
2470 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
2475 tx_ring->next_to_use = 0;
2476 tx_ring->next_to_clean = 0;
2477 tx_ring->work_limit = tx_ring->count;
2481 vfree(tx_ring->tx_buffer_info);
2482 tx_ring->tx_buffer_info = NULL;
2483 hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2484 "descriptor ring\n");
2489 * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2490 * @adapter: board private structure
2492 * If this function returns with an error, then it's possible one or
2493 * more of the rings is populated (while the rest are not). It is the
2494 * callers duty to clean those orphaned rings.
2496 * Return 0 on success, negative on failure
2498 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2502 for (i = 0; i < adapter->num_tx_queues; i++) {
2503 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2506 hw_dbg(&adapter->hw,
2507 "Allocation for Tx Queue %u failed\n", i);
2515 * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2516 * @adapter: board private structure
2517 * @rx_ring: rx descriptor ring (for a specific queue) to setup
2519 * Returns 0 on success, negative on failure
2521 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2522 struct ixgbevf_ring *rx_ring)
2524 struct pci_dev *pdev = adapter->pdev;
2527 size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2528 rx_ring->rx_buffer_info = vmalloc(size);
2529 if (!rx_ring->rx_buffer_info) {
2530 hw_dbg(&adapter->hw,
2531 "Unable to vmalloc buffer memory for "
2532 "the receive descriptor ring\n");
2535 memset(rx_ring->rx_buffer_info, 0, size);
2537 /* Round up to nearest 4K */
2538 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2539 rx_ring->size = ALIGN(rx_ring->size, 4096);
2541 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
2544 if (!rx_ring->desc) {
2545 hw_dbg(&adapter->hw,
2546 "Unable to allocate memory for "
2547 "the receive descriptor ring\n");
2548 vfree(rx_ring->rx_buffer_info);
2549 rx_ring->rx_buffer_info = NULL;
2553 rx_ring->next_to_clean = 0;
2554 rx_ring->next_to_use = 0;
2562 * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2563 * @adapter: board private structure
2565 * If this function returns with an error, then it's possible one or
2566 * more of the rings is populated (while the rest are not). It is the
2567 * callers duty to clean those orphaned rings.
2569 * Return 0 on success, negative on failure
2571 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2575 for (i = 0; i < adapter->num_rx_queues; i++) {
2576 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2579 hw_dbg(&adapter->hw,
2580 "Allocation for Rx Queue %u failed\n", i);
2587 * ixgbevf_free_rx_resources - Free Rx Resources
2588 * @adapter: board private structure
2589 * @rx_ring: ring to clean the resources from
2591 * Free all receive software resources
2593 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2594 struct ixgbevf_ring *rx_ring)
2596 struct pci_dev *pdev = adapter->pdev;
2598 ixgbevf_clean_rx_ring(adapter, rx_ring);
2600 vfree(rx_ring->rx_buffer_info);
2601 rx_ring->rx_buffer_info = NULL;
2603 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2605 rx_ring->desc = NULL;
2609 * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2610 * @adapter: board private structure
2612 * Free all receive software resources
2614 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2618 for (i = 0; i < adapter->num_rx_queues; i++)
2619 if (adapter->rx_ring[i].desc)
2620 ixgbevf_free_rx_resources(adapter,
2621 &adapter->rx_ring[i]);
2625 * ixgbevf_open - Called when a network interface is made active
2626 * @netdev: network interface device structure
2628 * Returns 0 on success, negative value on failure
2630 * The open entry point is called when a network interface is made
2631 * active by the system (IFF_UP). At this point all resources needed
2632 * for transmit and receive operations are allocated, the interrupt
2633 * handler is registered with the OS, the watchdog timer is started,
2634 * and the stack is notified that the interface is ready.
2636 static int ixgbevf_open(struct net_device *netdev)
2638 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2639 struct ixgbe_hw *hw = &adapter->hw;
2642 /* disallow open during test */
2643 if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2646 if (hw->adapter_stopped) {
2647 ixgbevf_reset(adapter);
2648 /* if adapter is still stopped then PF isn't up and
2649 * the vf can't start. */
2650 if (hw->adapter_stopped) {
2651 err = IXGBE_ERR_MBX;
2652 printk(KERN_ERR "Unable to start - perhaps the PF"
2653 "Driver isn't up yet\n");
2654 goto err_setup_reset;
2658 /* allocate transmit descriptors */
2659 err = ixgbevf_setup_all_tx_resources(adapter);
2663 /* allocate receive descriptors */
2664 err = ixgbevf_setup_all_rx_resources(adapter);
2668 ixgbevf_configure(adapter);
2671 * Map the Tx/Rx rings to the vectors we were allotted.
2672 * if request_irq will be called in this function map_rings
2673 * must be called *before* up_complete
2675 ixgbevf_map_rings_to_vectors(adapter);
2677 err = ixgbevf_up_complete(adapter);
2681 /* clear any pending interrupts, may auto mask */
2682 IXGBE_READ_REG(hw, IXGBE_VTEICR);
2683 err = ixgbevf_request_irq(adapter);
2687 ixgbevf_irq_enable(adapter, true, true);
2692 ixgbevf_down(adapter);
2694 ixgbevf_free_irq(adapter);
2696 ixgbevf_free_all_rx_resources(adapter);
2698 ixgbevf_free_all_tx_resources(adapter);
2699 ixgbevf_reset(adapter);
2707 * ixgbevf_close - Disables a network interface
2708 * @netdev: network interface device structure
2710 * Returns 0, this is not allowed to fail
2712 * The close entry point is called when an interface is de-activated
2713 * by the OS. The hardware is still under the drivers control, but
2714 * needs to be disabled. A global MAC reset is issued to stop the
2715 * hardware, and all transmit and receive resources are freed.
2717 static int ixgbevf_close(struct net_device *netdev)
2719 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2721 ixgbevf_down(adapter);
2722 ixgbevf_free_irq(adapter);
2724 ixgbevf_free_all_tx_resources(adapter);
2725 ixgbevf_free_all_rx_resources(adapter);
2730 static int ixgbevf_tso(struct ixgbevf_adapter *adapter,
2731 struct ixgbevf_ring *tx_ring,
2732 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2734 struct ixgbe_adv_tx_context_desc *context_desc;
2737 struct ixgbevf_tx_buffer *tx_buffer_info;
2738 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
2739 u32 mss_l4len_idx, l4len;
2741 if (skb_is_gso(skb)) {
2742 if (skb_header_cloned(skb)) {
2743 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2747 l4len = tcp_hdrlen(skb);
2750 if (skb->protocol == htons(ETH_P_IP)) {
2751 struct iphdr *iph = ip_hdr(skb);
2754 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2758 adapter->hw_tso_ctxt++;
2759 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2760 ipv6_hdr(skb)->payload_len = 0;
2761 tcp_hdr(skb)->check =
2762 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2763 &ipv6_hdr(skb)->daddr,
2765 adapter->hw_tso6_ctxt++;
2768 i = tx_ring->next_to_use;
2770 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2771 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2773 /* VLAN MACLEN IPLEN */
2774 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2776 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2777 vlan_macip_lens |= ((skb_network_offset(skb)) <<
2778 IXGBE_ADVTXD_MACLEN_SHIFT);
2779 *hdr_len += skb_network_offset(skb);
2781 (skb_transport_header(skb) - skb_network_header(skb));
2783 (skb_transport_header(skb) - skb_network_header(skb));
2784 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2785 context_desc->seqnum_seed = 0;
2787 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2788 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
2789 IXGBE_ADVTXD_DTYP_CTXT);
2791 if (skb->protocol == htons(ETH_P_IP))
2792 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2793 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2794 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2798 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
2799 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
2800 /* use index 1 for TSO */
2801 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
2802 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2804 tx_buffer_info->time_stamp = jiffies;
2805 tx_buffer_info->next_to_watch = i;
2808 if (i == tx_ring->count)
2810 tx_ring->next_to_use = i;
2818 static bool ixgbevf_tx_csum(struct ixgbevf_adapter *adapter,
2819 struct ixgbevf_ring *tx_ring,
2820 struct sk_buff *skb, u32 tx_flags)
2822 struct ixgbe_adv_tx_context_desc *context_desc;
2824 struct ixgbevf_tx_buffer *tx_buffer_info;
2825 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2827 if (skb->ip_summed == CHECKSUM_PARTIAL ||
2828 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
2829 i = tx_ring->next_to_use;
2830 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2831 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2833 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2834 vlan_macip_lens |= (tx_flags &
2835 IXGBE_TX_FLAGS_VLAN_MASK);
2836 vlan_macip_lens |= (skb_network_offset(skb) <<
2837 IXGBE_ADVTXD_MACLEN_SHIFT);
2838 if (skb->ip_summed == CHECKSUM_PARTIAL)
2839 vlan_macip_lens |= (skb_transport_header(skb) -
2840 skb_network_header(skb));
2842 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2843 context_desc->seqnum_seed = 0;
2845 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2846 IXGBE_ADVTXD_DTYP_CTXT);
2848 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2849 switch (skb->protocol) {
2850 case __constant_htons(ETH_P_IP):
2851 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2852 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2854 IXGBE_ADVTXD_TUCMD_L4T_TCP;
2856 case __constant_htons(ETH_P_IPV6):
2857 /* XXX what about other V6 headers?? */
2858 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2860 IXGBE_ADVTXD_TUCMD_L4T_TCP;
2863 if (unlikely(net_ratelimit())) {
2865 "partial checksum but "
2873 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2874 /* use index zero for tx checksum offload */
2875 context_desc->mss_l4len_idx = 0;
2877 tx_buffer_info->time_stamp = jiffies;
2878 tx_buffer_info->next_to_watch = i;
2880 adapter->hw_csum_tx_good++;
2882 if (i == tx_ring->count)
2884 tx_ring->next_to_use = i;
2892 static int ixgbevf_tx_map(struct ixgbevf_adapter *adapter,
2893 struct ixgbevf_ring *tx_ring,
2894 struct sk_buff *skb, u32 tx_flags,
2897 struct pci_dev *pdev = adapter->pdev;
2898 struct ixgbevf_tx_buffer *tx_buffer_info;
2900 unsigned int total = skb->len;
2901 unsigned int offset = 0, size, count = 0, i;
2902 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2905 i = tx_ring->next_to_use;
2907 len = min(skb_headlen(skb), total);
2909 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2910 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2912 tx_buffer_info->length = size;
2913 tx_buffer_info->mapped_as_page = false;
2914 tx_buffer_info->dma = pci_map_single(adapter->pdev,
2916 size, PCI_DMA_TODEVICE);
2917 if (pci_dma_mapping_error(pdev, tx_buffer_info->dma))
2919 tx_buffer_info->time_stamp = jiffies;
2920 tx_buffer_info->next_to_watch = i;
2927 if (i == tx_ring->count)
2931 for (f = 0; f < nr_frags; f++) {
2932 struct skb_frag_struct *frag;
2934 frag = &skb_shinfo(skb)->frags[f];
2935 len = min((unsigned int)frag->size, total);
2936 offset = frag->page_offset;
2939 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2940 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2942 tx_buffer_info->length = size;
2943 tx_buffer_info->dma = pci_map_page(adapter->pdev,
2948 tx_buffer_info->mapped_as_page = true;
2949 if (pci_dma_mapping_error(pdev, tx_buffer_info->dma))
2951 tx_buffer_info->time_stamp = jiffies;
2952 tx_buffer_info->next_to_watch = i;
2959 if (i == tx_ring->count)
2967 i = tx_ring->count - 1;
2970 tx_ring->tx_buffer_info[i].skb = skb;
2971 tx_ring->tx_buffer_info[first].next_to_watch = i;
2976 dev_err(&pdev->dev, "TX DMA map failed\n");
2978 /* clear timestamp and dma mappings for failed tx_buffer_info map */
2979 tx_buffer_info->dma = 0;
2980 tx_buffer_info->time_stamp = 0;
2981 tx_buffer_info->next_to_watch = 0;
2984 /* clear timestamp and dma mappings for remaining portion of packet */
2985 while (count >= 0) {
2989 i += tx_ring->count;
2990 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2991 ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2997 static void ixgbevf_tx_queue(struct ixgbevf_adapter *adapter,
2998 struct ixgbevf_ring *tx_ring, int tx_flags,
2999 int count, u32 paylen, u8 hdr_len)
3001 union ixgbe_adv_tx_desc *tx_desc = NULL;
3002 struct ixgbevf_tx_buffer *tx_buffer_info;
3003 u32 olinfo_status = 0, cmd_type_len = 0;
3006 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3008 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3010 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3012 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3013 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3015 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3016 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3018 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3019 IXGBE_ADVTXD_POPTS_SHIFT;
3021 /* use index 1 context for tso */
3022 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3023 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3024 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
3025 IXGBE_ADVTXD_POPTS_SHIFT;
3027 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3028 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3029 IXGBE_ADVTXD_POPTS_SHIFT;
3031 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3033 i = tx_ring->next_to_use;
3035 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3036 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
3037 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3038 tx_desc->read.cmd_type_len =
3039 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3040 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3042 if (i == tx_ring->count)
3046 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3049 * Force memory writes to complete before letting h/w
3050 * know there are new descriptors to fetch. (Only
3051 * applicable for weak-ordered memory model archs,
3056 tx_ring->next_to_use = i;
3057 writel(i, adapter->hw.hw_addr + tx_ring->tail);
3060 static int __ixgbevf_maybe_stop_tx(struct net_device *netdev,
3061 struct ixgbevf_ring *tx_ring, int size)
3063 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3065 netif_stop_subqueue(netdev, tx_ring->queue_index);
3066 /* Herbert's original patch had:
3067 * smp_mb__after_netif_stop_queue();
3068 * but since that doesn't exist yet, just open code it. */
3071 /* We need to check again in a case another CPU has just
3072 * made room available. */
3073 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3076 /* A reprieve! - use start_queue because it doesn't call schedule */
3077 netif_start_subqueue(netdev, tx_ring->queue_index);
3078 ++adapter->restart_queue;
3082 static int ixgbevf_maybe_stop_tx(struct net_device *netdev,
3083 struct ixgbevf_ring *tx_ring, int size)
3085 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3087 return __ixgbevf_maybe_stop_tx(netdev, tx_ring, size);
3090 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3092 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3093 struct ixgbevf_ring *tx_ring;
3095 unsigned int tx_flags = 0;
3102 tx_ring = &adapter->tx_ring[r_idx];
3104 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3105 tx_flags |= vlan_tx_tag_get(skb);
3106 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3107 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3110 /* four things can cause us to need a context descriptor */
3111 if (skb_is_gso(skb) ||
3112 (skb->ip_summed == CHECKSUM_PARTIAL) ||
3113 (tx_flags & IXGBE_TX_FLAGS_VLAN))
3116 count += TXD_USE_COUNT(skb_headlen(skb));
3117 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3118 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3120 if (ixgbevf_maybe_stop_tx(netdev, tx_ring, count)) {
3122 return NETDEV_TX_BUSY;
3125 first = tx_ring->next_to_use;
3127 if (skb->protocol == htons(ETH_P_IP))
3128 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3129 tso = ixgbevf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
3131 dev_kfree_skb_any(skb);
3132 return NETDEV_TX_OK;
3136 tx_flags |= IXGBE_TX_FLAGS_TSO;
3137 else if (ixgbevf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
3138 (skb->ip_summed == CHECKSUM_PARTIAL))
3139 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3141 ixgbevf_tx_queue(adapter, tx_ring, tx_flags,
3142 ixgbevf_tx_map(adapter, tx_ring, skb, tx_flags, first),
3145 netdev->trans_start = jiffies;
3147 ixgbevf_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
3149 return NETDEV_TX_OK;
3153 * ixgbevf_get_stats - Get System Network Statistics
3154 * @netdev: network interface device structure
3156 * Returns the address of the device statistics structure.
3157 * The statistics are actually updated from the timer callback.
3159 static struct net_device_stats *ixgbevf_get_stats(struct net_device *netdev)
3161 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3163 /* only return the current stats */
3164 return &adapter->net_stats;
3168 * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3169 * @netdev: network interface device structure
3170 * @p: pointer to an address structure
3172 * Returns 0 on success, negative on failure
3174 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3176 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3177 struct ixgbe_hw *hw = &adapter->hw;
3178 struct sockaddr *addr = p;
3180 if (!is_valid_ether_addr(addr->sa_data))
3181 return -EADDRNOTAVAIL;
3183 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3184 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3186 if (hw->mac.ops.set_rar)
3187 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3193 * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3194 * @netdev: network interface device structure
3195 * @new_mtu: new value for maximum frame size
3197 * Returns 0 on success, negative on failure
3199 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3201 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3202 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3204 /* MTU < 68 is an error and causes problems on some kernels */
3205 if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
3208 hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3209 netdev->mtu, new_mtu);
3210 /* must set new MTU before calling down or up */
3211 netdev->mtu = new_mtu;
3213 if (netif_running(netdev))
3214 ixgbevf_reinit_locked(adapter);
3219 static void ixgbevf_shutdown(struct pci_dev *pdev)
3221 struct net_device *netdev = pci_get_drvdata(pdev);
3222 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3224 netif_device_detach(netdev);
3226 if (netif_running(netdev)) {
3227 ixgbevf_down(adapter);
3228 ixgbevf_free_irq(adapter);
3229 ixgbevf_free_all_tx_resources(adapter);
3230 ixgbevf_free_all_rx_resources(adapter);
3234 pci_save_state(pdev);
3237 pci_disable_device(pdev);
3240 #ifdef HAVE_NET_DEVICE_OPS
3241 static const struct net_device_ops ixgbe_netdev_ops = {
3242 .ndo_open = &ixgbevf_open,
3243 .ndo_stop = &ixgbevf_close,
3244 .ndo_start_xmit = &ixgbevf_xmit_frame,
3245 .ndo_get_stats = &ixgbevf_get_stats,
3246 .ndo_set_rx_mode = &ixgbevf_set_rx_mode,
3247 .ndo_set_multicast_list = &ixgbevf_set_rx_mode,
3248 .ndo_validate_addr = eth_validate_addr,
3249 .ndo_set_mac_address = &ixgbevf_set_mac,
3250 .ndo_change_mtu = &ixgbevf_change_mtu,
3251 .ndo_tx_timeout = &ixgbevf_tx_timeout,
3252 .ndo_vlan_rx_register = &ixgbevf_vlan_rx_register,
3253 .ndo_vlan_rx_add_vid = &ixgbevf_vlan_rx_add_vid,
3254 .ndo_vlan_rx_kill_vid = &ixgbevf_vlan_rx_kill_vid,
3256 #endif /* HAVE_NET_DEVICE_OPS */
3258 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3260 struct ixgbevf_adapter *adapter;
3261 adapter = netdev_priv(dev);
3262 #ifdef HAVE_NET_DEVICE_OPS
3263 dev->netdev_ops = &ixgbe_netdev_ops;
3264 #else /* HAVE_NET_DEVICE_OPS */
3265 dev->open = &ixgbevf_open;
3266 dev->stop = &ixgbevf_close;
3268 dev->hard_start_xmit = &ixgbevf_xmit_frame;
3270 dev->get_stats = &ixgbevf_get_stats;
3271 dev->set_multicast_list = &ixgbevf_set_rx_mode;
3272 dev->set_mac_address = &ixgbevf_set_mac;
3273 dev->change_mtu = &ixgbevf_change_mtu;
3274 dev->tx_timeout = &ixgbevf_tx_timeout;
3275 dev->vlan_rx_register = &ixgbevf_vlan_rx_register;
3276 dev->vlan_rx_add_vid = &ixgbevf_vlan_rx_add_vid;
3277 dev->vlan_rx_kill_vid = &ixgbevf_vlan_rx_kill_vid;
3278 #endif /* HAVE_NET_DEVICE_OPS */
3279 ixgbevf_set_ethtool_ops(dev);
3280 dev->watchdog_timeo = 5 * HZ;
3284 * ixgbevf_probe - Device Initialization Routine
3285 * @pdev: PCI device information struct
3286 * @ent: entry in ixgbevf_pci_tbl
3288 * Returns 0 on success, negative on failure
3290 * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3291 * The OS initialization, configuring of the adapter private structure,
3292 * and a hardware reset occur.
3294 static int __devinit ixgbevf_probe(struct pci_dev *pdev,
3295 const struct pci_device_id *ent)
3297 struct net_device *netdev;
3298 struct ixgbevf_adapter *adapter = NULL;
3299 struct ixgbe_hw *hw = NULL;
3300 const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3301 static int cards_found;
3302 int err, pci_using_dac;
3304 err = pci_enable_device(pdev);
3308 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
3309 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
3312 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3314 err = pci_set_consistent_dma_mask(pdev,
3317 dev_err(&pdev->dev, "No usable DMA "
3318 "configuration, aborting\n");
3325 err = pci_request_regions(pdev, ixgbevf_driver_name);
3327 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3331 pci_set_master(pdev);
3334 netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3337 netdev = alloc_etherdev(sizeof(struct ixgbevf_adapter));
3341 goto err_alloc_etherdev;
3344 SET_NETDEV_DEV(netdev, &pdev->dev);
3346 pci_set_drvdata(pdev, netdev);
3347 adapter = netdev_priv(netdev);
3349 adapter->netdev = netdev;
3350 adapter->pdev = pdev;
3353 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3356 * call save state here in standalone driver because it relies on
3357 * adapter struct to exist, and needs to call netdev_priv
3359 pci_save_state(pdev);
3361 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3362 pci_resource_len(pdev, 0));
3368 ixgbevf_assign_netdev_ops(netdev);
3370 adapter->bd_number = cards_found;
3373 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3374 hw->mac.type = ii->mac;
3376 memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3377 sizeof(struct ixgbe_mac_operations));
3379 adapter->flags &= ~IXGBE_FLAG_RX_PS_CAPABLE;
3380 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
3381 adapter->flags |= IXGBE_FLAG_RX_1BUF_CAPABLE;
3383 /* setup the private structure */
3384 err = ixgbevf_sw_init(adapter);
3386 ixgbevf_init_last_counter_stats(adapter);
3388 #ifdef MAX_SKB_FRAGS
3389 netdev->features = NETIF_F_SG |
3391 NETIF_F_HW_VLAN_TX |
3392 NETIF_F_HW_VLAN_RX |
3393 NETIF_F_HW_VLAN_FILTER;
3395 netdev->features |= NETIF_F_IPV6_CSUM;
3396 netdev->features |= NETIF_F_TSO;
3397 netdev->features |= NETIF_F_TSO6;
3398 netdev->vlan_features |= NETIF_F_TSO;
3399 netdev->vlan_features |= NETIF_F_TSO6;
3400 netdev->vlan_features |= NETIF_F_IP_CSUM;
3401 netdev->vlan_features |= NETIF_F_SG;
3404 netdev->features |= NETIF_F_HIGHDMA;
3406 #endif /* MAX_SKB_FRAGS */
3408 /* The HW MAC address was set and/or determined in sw_init */
3409 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
3410 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
3412 if (!is_valid_ether_addr(netdev->dev_addr)) {
3413 printk(KERN_ERR "invalid MAC address\n");
3418 init_timer(&adapter->watchdog_timer);
3419 adapter->watchdog_timer.function = &ixgbevf_watchdog;
3420 adapter->watchdog_timer.data = (unsigned long)adapter;
3422 INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3423 INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3425 err = ixgbevf_init_interrupt_scheme(adapter);
3429 /* pick up the PCI bus settings for reporting later */
3430 if (hw->mac.ops.get_bus_info)
3431 hw->mac.ops.get_bus_info(hw);
3434 netif_carrier_off(netdev);
3435 netif_tx_stop_all_queues(netdev);
3437 strcpy(netdev->name, "eth%d");
3439 err = register_netdev(netdev);
3443 adapter->netdev_registered = true;
3445 /* print the MAC address */
3446 hw_dbg(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
3447 netdev->dev_addr[0],
3448 netdev->dev_addr[1],
3449 netdev->dev_addr[2],
3450 netdev->dev_addr[3],
3451 netdev->dev_addr[4],
3452 netdev->dev_addr[5]);
3454 hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3456 hw_dbg(hw, "LRO is disabled \n");
3458 hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3464 ixgbevf_reset_interrupt_capability(adapter);
3465 iounmap(hw->hw_addr);
3467 free_netdev(netdev);
3469 pci_release_regions(pdev);
3472 pci_disable_device(pdev);
3477 * ixgbevf_remove - Device Removal Routine
3478 * @pdev: PCI device information struct
3480 * ixgbevf_remove is called by the PCI subsystem to alert the driver
3481 * that it should release a PCI device. The could be caused by a
3482 * Hot-Plug event, or because the driver is going to be removed from
3485 static void __devexit ixgbevf_remove(struct pci_dev *pdev)
3487 struct net_device *netdev = pci_get_drvdata(pdev);
3488 struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3490 set_bit(__IXGBEVF_DOWN, &adapter->state);
3492 del_timer_sync(&adapter->watchdog_timer);
3494 cancel_work_sync(&adapter->watchdog_task);
3496 flush_scheduled_work();
3498 if (adapter->netdev_registered) {
3499 unregister_netdev(netdev);
3500 adapter->netdev_registered = false;
3503 ixgbevf_reset_interrupt_capability(adapter);
3505 iounmap(adapter->hw.hw_addr);
3506 pci_release_regions(pdev);
3508 hw_dbg(&adapter->hw, "Remove complete\n");
3510 kfree(adapter->tx_ring);
3511 kfree(adapter->rx_ring);
3513 free_netdev(netdev);
3515 pci_disable_device(pdev);
3518 static struct pci_driver ixgbevf_driver = {
3519 .name = ixgbevf_driver_name,
3520 .id_table = ixgbevf_pci_tbl,
3521 .probe = ixgbevf_probe,
3522 .remove = __devexit_p(ixgbevf_remove),
3523 .shutdown = ixgbevf_shutdown,
3527 * ixgbe_init_module - Driver Registration Routine
3529 * ixgbe_init_module is the first routine called when the driver is
3530 * loaded. All it does is register with the PCI subsystem.
3532 static int __init ixgbevf_init_module(void)
3535 printk(KERN_INFO "ixgbevf: %s - version %s\n", ixgbevf_driver_string,
3536 ixgbevf_driver_version);
3538 printk(KERN_INFO "%s\n", ixgbevf_copyright);
3540 ret = pci_register_driver(&ixgbevf_driver);
3544 module_init(ixgbevf_init_module);
3547 * ixgbe_exit_module - Driver Exit Cleanup Routine
3549 * ixgbe_exit_module is called just before the driver is removed
3552 static void __exit ixgbevf_exit_module(void)
3554 pci_unregister_driver(&ixgbevf_driver);
3559 * ixgbe_get_hw_dev_name - return device name string
3560 * used by hardware layer to print debugging information
3562 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3564 struct ixgbevf_adapter *adapter = hw->back;
3565 return adapter->netdev->name;
3569 module_exit(ixgbevf_exit_module);
3571 /* ixgbevf_main.c */