1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2009 - 2018 Intel Corporation. */
4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6 #include <linux/module.h>
7 #include <linux/types.h>
8 #include <linux/init.h>
10 #include <linux/vmalloc.h>
11 #include <linux/pagemap.h>
12 #include <linux/delay.h>
13 #include <linux/netdevice.h>
14 #include <linux/tcp.h>
15 #include <linux/ipv6.h>
16 #include <linux/slab.h>
17 #include <net/checksum.h>
18 #include <net/ip6_checksum.h>
19 #include <linux/mii.h>
20 #include <linux/ethtool.h>
21 #include <linux/if_vlan.h>
22 #include <linux/prefetch.h>
23 #include <linux/sctp.h>
27 #define DRV_VERSION "2.4.0-k"
28 char igbvf_driver_name[] = "igbvf";
29 const char igbvf_driver_version[] = DRV_VERSION;
30 static const char igbvf_driver_string[] =
31 "Intel(R) Gigabit Virtual Function Network Driver";
32 static const char igbvf_copyright[] =
33 "Copyright (c) 2009 - 2012 Intel Corporation.";
35 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
36 static int debug = -1;
37 module_param(debug, int, 0);
38 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
40 static int igbvf_poll(struct napi_struct *napi, int budget);
41 static void igbvf_reset(struct igbvf_adapter *);
42 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
43 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
45 static struct igbvf_info igbvf_vf_info = {
49 .init_ops = e1000_init_function_pointers_vf,
52 static struct igbvf_info igbvf_i350_vf_info = {
53 .mac = e1000_vfadapt_i350,
56 .init_ops = e1000_init_function_pointers_vf,
59 static const struct igbvf_info *igbvf_info_tbl[] = {
60 [board_vf] = &igbvf_vf_info,
61 [board_i350_vf] = &igbvf_i350_vf_info,
65 * igbvf_desc_unused - calculate if we have unused descriptors
66 * @rx_ring: address of receive ring structure
68 static int igbvf_desc_unused(struct igbvf_ring *ring)
70 if (ring->next_to_clean > ring->next_to_use)
71 return ring->next_to_clean - ring->next_to_use - 1;
73 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
77 * igbvf_receive_skb - helper function to handle Rx indications
78 * @adapter: board private structure
79 * @status: descriptor status field as written by hardware
80 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
81 * @skb: pointer to sk_buff to be indicated to stack
83 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
84 struct net_device *netdev,
90 if (status & E1000_RXD_STAT_VP) {
91 if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) &&
92 (status & E1000_RXDEXT_STATERR_LB))
93 vid = be16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
95 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
96 if (test_bit(vid, adapter->active_vlans))
97 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
100 napi_gro_receive(&adapter->rx_ring->napi, skb);
103 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
104 u32 status_err, struct sk_buff *skb)
106 skb_checksum_none_assert(skb);
108 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
109 if ((status_err & E1000_RXD_STAT_IXSM) ||
110 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
113 /* TCP/UDP checksum error bit is set */
115 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
116 /* let the stack verify checksum errors */
117 adapter->hw_csum_err++;
121 /* It must be a TCP or UDP packet with a valid checksum */
122 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
123 skb->ip_summed = CHECKSUM_UNNECESSARY;
125 adapter->hw_csum_good++;
129 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
130 * @rx_ring: address of ring structure to repopulate
131 * @cleaned_count: number of buffers to repopulate
133 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
136 struct igbvf_adapter *adapter = rx_ring->adapter;
137 struct net_device *netdev = adapter->netdev;
138 struct pci_dev *pdev = adapter->pdev;
139 union e1000_adv_rx_desc *rx_desc;
140 struct igbvf_buffer *buffer_info;
145 i = rx_ring->next_to_use;
146 buffer_info = &rx_ring->buffer_info[i];
148 if (adapter->rx_ps_hdr_size)
149 bufsz = adapter->rx_ps_hdr_size;
151 bufsz = adapter->rx_buffer_len;
153 while (cleaned_count--) {
154 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
156 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
157 if (!buffer_info->page) {
158 buffer_info->page = alloc_page(GFP_ATOMIC);
159 if (!buffer_info->page) {
160 adapter->alloc_rx_buff_failed++;
163 buffer_info->page_offset = 0;
165 buffer_info->page_offset ^= PAGE_SIZE / 2;
167 buffer_info->page_dma =
168 dma_map_page(&pdev->dev, buffer_info->page,
169 buffer_info->page_offset,
172 if (dma_mapping_error(&pdev->dev,
173 buffer_info->page_dma)) {
174 __free_page(buffer_info->page);
175 buffer_info->page = NULL;
176 dev_err(&pdev->dev, "RX DMA map failed\n");
181 if (!buffer_info->skb) {
182 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
184 adapter->alloc_rx_buff_failed++;
188 buffer_info->skb = skb;
189 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
192 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
193 dev_kfree_skb(buffer_info->skb);
194 buffer_info->skb = NULL;
195 dev_err(&pdev->dev, "RX DMA map failed\n");
199 /* Refresh the desc even if buffer_addrs didn't change because
200 * each write-back erases this info.
202 if (adapter->rx_ps_hdr_size) {
203 rx_desc->read.pkt_addr =
204 cpu_to_le64(buffer_info->page_dma);
205 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
207 rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
208 rx_desc->read.hdr_addr = 0;
212 if (i == rx_ring->count)
214 buffer_info = &rx_ring->buffer_info[i];
218 if (rx_ring->next_to_use != i) {
219 rx_ring->next_to_use = i;
221 i = (rx_ring->count - 1);
225 /* Force memory writes to complete before letting h/w
226 * know there are new descriptors to fetch. (Only
227 * applicable for weak-ordered memory model archs,
231 writel(i, adapter->hw.hw_addr + rx_ring->tail);
236 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
237 * @adapter: board private structure
239 * the return value indicates whether actual cleaning was done, there
240 * is no guarantee that everything was cleaned
242 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
243 int *work_done, int work_to_do)
245 struct igbvf_ring *rx_ring = adapter->rx_ring;
246 struct net_device *netdev = adapter->netdev;
247 struct pci_dev *pdev = adapter->pdev;
248 union e1000_adv_rx_desc *rx_desc, *next_rxd;
249 struct igbvf_buffer *buffer_info, *next_buffer;
251 bool cleaned = false;
252 int cleaned_count = 0;
253 unsigned int total_bytes = 0, total_packets = 0;
255 u32 length, hlen, staterr;
257 i = rx_ring->next_to_clean;
258 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
259 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
261 while (staterr & E1000_RXD_STAT_DD) {
262 if (*work_done >= work_to_do)
265 rmb(); /* read descriptor and rx_buffer_info after status DD */
267 buffer_info = &rx_ring->buffer_info[i];
269 /* HW will not DMA in data larger than the given buffer, even
270 * if it parses the (NFS, of course) header to be larger. In
271 * that case, it fills the header buffer and spills the rest
274 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info)
275 & E1000_RXDADV_HDRBUFLEN_MASK) >>
276 E1000_RXDADV_HDRBUFLEN_SHIFT;
277 if (hlen > adapter->rx_ps_hdr_size)
278 hlen = adapter->rx_ps_hdr_size;
280 length = le16_to_cpu(rx_desc->wb.upper.length);
284 skb = buffer_info->skb;
285 prefetch(skb->data - NET_IP_ALIGN);
286 buffer_info->skb = NULL;
287 if (!adapter->rx_ps_hdr_size) {
288 dma_unmap_single(&pdev->dev, buffer_info->dma,
289 adapter->rx_buffer_len,
291 buffer_info->dma = 0;
292 skb_put(skb, length);
296 if (!skb_shinfo(skb)->nr_frags) {
297 dma_unmap_single(&pdev->dev, buffer_info->dma,
298 adapter->rx_ps_hdr_size,
300 buffer_info->dma = 0;
305 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
308 buffer_info->page_dma = 0;
310 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
312 buffer_info->page_offset,
315 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
316 (page_count(buffer_info->page) != 1))
317 buffer_info->page = NULL;
319 get_page(buffer_info->page);
322 skb->data_len += length;
323 skb->truesize += PAGE_SIZE / 2;
327 if (i == rx_ring->count)
329 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
331 next_buffer = &rx_ring->buffer_info[i];
333 if (!(staterr & E1000_RXD_STAT_EOP)) {
334 buffer_info->skb = next_buffer->skb;
335 buffer_info->dma = next_buffer->dma;
336 next_buffer->skb = skb;
337 next_buffer->dma = 0;
341 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
342 dev_kfree_skb_irq(skb);
346 total_bytes += skb->len;
349 igbvf_rx_checksum_adv(adapter, staterr, skb);
351 skb->protocol = eth_type_trans(skb, netdev);
353 igbvf_receive_skb(adapter, netdev, skb, staterr,
354 rx_desc->wb.upper.vlan);
357 rx_desc->wb.upper.status_error = 0;
359 /* return some buffers to hardware, one at a time is too slow */
360 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
361 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
365 /* use prefetched values */
367 buffer_info = next_buffer;
369 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
372 rx_ring->next_to_clean = i;
373 cleaned_count = igbvf_desc_unused(rx_ring);
376 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
378 adapter->total_rx_packets += total_packets;
379 adapter->total_rx_bytes += total_bytes;
380 netdev->stats.rx_bytes += total_bytes;
381 netdev->stats.rx_packets += total_packets;
385 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
386 struct igbvf_buffer *buffer_info)
388 if (buffer_info->dma) {
389 if (buffer_info->mapped_as_page)
390 dma_unmap_page(&adapter->pdev->dev,
395 dma_unmap_single(&adapter->pdev->dev,
399 buffer_info->dma = 0;
401 if (buffer_info->skb) {
402 dev_kfree_skb_any(buffer_info->skb);
403 buffer_info->skb = NULL;
405 buffer_info->time_stamp = 0;
409 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
410 * @adapter: board private structure
412 * Return 0 on success, negative on failure
414 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
415 struct igbvf_ring *tx_ring)
417 struct pci_dev *pdev = adapter->pdev;
420 size = sizeof(struct igbvf_buffer) * tx_ring->count;
421 tx_ring->buffer_info = vzalloc(size);
422 if (!tx_ring->buffer_info)
425 /* round up to nearest 4K */
426 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
427 tx_ring->size = ALIGN(tx_ring->size, 4096);
429 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
430 &tx_ring->dma, GFP_KERNEL);
434 tx_ring->adapter = adapter;
435 tx_ring->next_to_use = 0;
436 tx_ring->next_to_clean = 0;
440 vfree(tx_ring->buffer_info);
441 dev_err(&adapter->pdev->dev,
442 "Unable to allocate memory for the transmit descriptor ring\n");
447 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
448 * @adapter: board private structure
450 * Returns 0 on success, negative on failure
452 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
453 struct igbvf_ring *rx_ring)
455 struct pci_dev *pdev = adapter->pdev;
458 size = sizeof(struct igbvf_buffer) * rx_ring->count;
459 rx_ring->buffer_info = vzalloc(size);
460 if (!rx_ring->buffer_info)
463 desc_len = sizeof(union e1000_adv_rx_desc);
465 /* Round up to nearest 4K */
466 rx_ring->size = rx_ring->count * desc_len;
467 rx_ring->size = ALIGN(rx_ring->size, 4096);
469 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
470 &rx_ring->dma, GFP_KERNEL);
474 rx_ring->next_to_clean = 0;
475 rx_ring->next_to_use = 0;
477 rx_ring->adapter = adapter;
482 vfree(rx_ring->buffer_info);
483 rx_ring->buffer_info = NULL;
484 dev_err(&adapter->pdev->dev,
485 "Unable to allocate memory for the receive descriptor ring\n");
490 * igbvf_clean_tx_ring - Free Tx Buffers
491 * @tx_ring: ring to be cleaned
493 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
495 struct igbvf_adapter *adapter = tx_ring->adapter;
496 struct igbvf_buffer *buffer_info;
500 if (!tx_ring->buffer_info)
503 /* Free all the Tx ring sk_buffs */
504 for (i = 0; i < tx_ring->count; i++) {
505 buffer_info = &tx_ring->buffer_info[i];
506 igbvf_put_txbuf(adapter, buffer_info);
509 size = sizeof(struct igbvf_buffer) * tx_ring->count;
510 memset(tx_ring->buffer_info, 0, size);
512 /* Zero out the descriptor ring */
513 memset(tx_ring->desc, 0, tx_ring->size);
515 tx_ring->next_to_use = 0;
516 tx_ring->next_to_clean = 0;
518 writel(0, adapter->hw.hw_addr + tx_ring->head);
519 writel(0, adapter->hw.hw_addr + tx_ring->tail);
523 * igbvf_free_tx_resources - Free Tx Resources per Queue
524 * @tx_ring: ring to free resources from
526 * Free all transmit software resources
528 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
530 struct pci_dev *pdev = tx_ring->adapter->pdev;
532 igbvf_clean_tx_ring(tx_ring);
534 vfree(tx_ring->buffer_info);
535 tx_ring->buffer_info = NULL;
537 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
540 tx_ring->desc = NULL;
544 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
545 * @adapter: board private structure
547 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
549 struct igbvf_adapter *adapter = rx_ring->adapter;
550 struct igbvf_buffer *buffer_info;
551 struct pci_dev *pdev = adapter->pdev;
555 if (!rx_ring->buffer_info)
558 /* Free all the Rx ring sk_buffs */
559 for (i = 0; i < rx_ring->count; i++) {
560 buffer_info = &rx_ring->buffer_info[i];
561 if (buffer_info->dma) {
562 if (adapter->rx_ps_hdr_size) {
563 dma_unmap_single(&pdev->dev, buffer_info->dma,
564 adapter->rx_ps_hdr_size,
567 dma_unmap_single(&pdev->dev, buffer_info->dma,
568 adapter->rx_buffer_len,
571 buffer_info->dma = 0;
574 if (buffer_info->skb) {
575 dev_kfree_skb(buffer_info->skb);
576 buffer_info->skb = NULL;
579 if (buffer_info->page) {
580 if (buffer_info->page_dma)
581 dma_unmap_page(&pdev->dev,
582 buffer_info->page_dma,
585 put_page(buffer_info->page);
586 buffer_info->page = NULL;
587 buffer_info->page_dma = 0;
588 buffer_info->page_offset = 0;
592 size = sizeof(struct igbvf_buffer) * rx_ring->count;
593 memset(rx_ring->buffer_info, 0, size);
595 /* Zero out the descriptor ring */
596 memset(rx_ring->desc, 0, rx_ring->size);
598 rx_ring->next_to_clean = 0;
599 rx_ring->next_to_use = 0;
601 writel(0, adapter->hw.hw_addr + rx_ring->head);
602 writel(0, adapter->hw.hw_addr + rx_ring->tail);
606 * igbvf_free_rx_resources - Free Rx Resources
607 * @rx_ring: ring to clean the resources from
609 * Free all receive software resources
612 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
614 struct pci_dev *pdev = rx_ring->adapter->pdev;
616 igbvf_clean_rx_ring(rx_ring);
618 vfree(rx_ring->buffer_info);
619 rx_ring->buffer_info = NULL;
621 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
623 rx_ring->desc = NULL;
627 * igbvf_update_itr - update the dynamic ITR value based on statistics
628 * @adapter: pointer to adapter
629 * @itr_setting: current adapter->itr
630 * @packets: the number of packets during this measurement interval
631 * @bytes: the number of bytes during this measurement interval
633 * Stores a new ITR value based on packets and byte counts during the last
634 * interrupt. The advantage of per interrupt computation is faster updates
635 * and more accurate ITR for the current traffic pattern. Constants in this
636 * function were computed based on theoretical maximum wire speed and thresholds
637 * were set based on testing data as well as attempting to minimize response
638 * time while increasing bulk throughput.
640 static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter,
641 enum latency_range itr_setting,
642 int packets, int bytes)
644 enum latency_range retval = itr_setting;
647 goto update_itr_done;
649 switch (itr_setting) {
651 /* handle TSO and jumbo frames */
652 if (bytes/packets > 8000)
653 retval = bulk_latency;
654 else if ((packets < 5) && (bytes > 512))
655 retval = low_latency;
657 case low_latency: /* 50 usec aka 20000 ints/s */
659 /* this if handles the TSO accounting */
660 if (bytes/packets > 8000)
661 retval = bulk_latency;
662 else if ((packets < 10) || ((bytes/packets) > 1200))
663 retval = bulk_latency;
664 else if ((packets > 35))
665 retval = lowest_latency;
666 } else if (bytes/packets > 2000) {
667 retval = bulk_latency;
668 } else if (packets <= 2 && bytes < 512) {
669 retval = lowest_latency;
672 case bulk_latency: /* 250 usec aka 4000 ints/s */
675 retval = low_latency;
676 } else if (bytes < 6000) {
677 retval = low_latency;
688 static int igbvf_range_to_itr(enum latency_range current_range)
692 switch (current_range) {
693 /* counts and packets in update_itr are dependent on these numbers */
695 new_itr = IGBVF_70K_ITR;
698 new_itr = IGBVF_20K_ITR;
701 new_itr = IGBVF_4K_ITR;
704 new_itr = IGBVF_START_ITR;
710 static void igbvf_set_itr(struct igbvf_adapter *adapter)
714 adapter->tx_ring->itr_range =
715 igbvf_update_itr(adapter,
716 adapter->tx_ring->itr_val,
717 adapter->total_tx_packets,
718 adapter->total_tx_bytes);
720 /* conservative mode (itr 3) eliminates the lowest_latency setting */
721 if (adapter->requested_itr == 3 &&
722 adapter->tx_ring->itr_range == lowest_latency)
723 adapter->tx_ring->itr_range = low_latency;
725 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range);
727 if (new_itr != adapter->tx_ring->itr_val) {
728 u32 current_itr = adapter->tx_ring->itr_val;
729 /* this attempts to bias the interrupt rate towards Bulk
730 * by adding intermediate steps when interrupt rate is
733 new_itr = new_itr > current_itr ?
734 min(current_itr + (new_itr >> 2), new_itr) :
736 adapter->tx_ring->itr_val = new_itr;
738 adapter->tx_ring->set_itr = 1;
741 adapter->rx_ring->itr_range =
742 igbvf_update_itr(adapter, adapter->rx_ring->itr_val,
743 adapter->total_rx_packets,
744 adapter->total_rx_bytes);
745 if (adapter->requested_itr == 3 &&
746 adapter->rx_ring->itr_range == lowest_latency)
747 adapter->rx_ring->itr_range = low_latency;
749 new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range);
751 if (new_itr != adapter->rx_ring->itr_val) {
752 u32 current_itr = adapter->rx_ring->itr_val;
754 new_itr = new_itr > current_itr ?
755 min(current_itr + (new_itr >> 2), new_itr) :
757 adapter->rx_ring->itr_val = new_itr;
759 adapter->rx_ring->set_itr = 1;
764 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
765 * @adapter: board private structure
767 * returns true if ring is completely cleaned
769 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
771 struct igbvf_adapter *adapter = tx_ring->adapter;
772 struct net_device *netdev = adapter->netdev;
773 struct igbvf_buffer *buffer_info;
775 union e1000_adv_tx_desc *tx_desc, *eop_desc;
776 unsigned int total_bytes = 0, total_packets = 0;
777 unsigned int i, count = 0;
778 bool cleaned = false;
780 i = tx_ring->next_to_clean;
781 buffer_info = &tx_ring->buffer_info[i];
782 eop_desc = buffer_info->next_to_watch;
785 /* if next_to_watch is not set then there is no work pending */
789 /* prevent any other reads prior to eop_desc */
792 /* if DD is not set pending work has not been completed */
793 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)))
796 /* clear next_to_watch to prevent false hangs */
797 buffer_info->next_to_watch = NULL;
799 for (cleaned = false; !cleaned; count++) {
800 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
801 cleaned = (tx_desc == eop_desc);
802 skb = buffer_info->skb;
805 unsigned int segs, bytecount;
807 /* gso_segs is currently only valid for tcp */
808 segs = skb_shinfo(skb)->gso_segs ?: 1;
809 /* multiply data chunks by size of headers */
810 bytecount = ((segs - 1) * skb_headlen(skb)) +
812 total_packets += segs;
813 total_bytes += bytecount;
816 igbvf_put_txbuf(adapter, buffer_info);
817 tx_desc->wb.status = 0;
820 if (i == tx_ring->count)
823 buffer_info = &tx_ring->buffer_info[i];
826 eop_desc = buffer_info->next_to_watch;
827 } while (count < tx_ring->count);
829 tx_ring->next_to_clean = i;
831 if (unlikely(count && netif_carrier_ok(netdev) &&
832 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
833 /* Make sure that anybody stopping the queue after this
834 * sees the new next_to_clean.
837 if (netif_queue_stopped(netdev) &&
838 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
839 netif_wake_queue(netdev);
840 ++adapter->restart_queue;
844 netdev->stats.tx_bytes += total_bytes;
845 netdev->stats.tx_packets += total_packets;
846 return count < tx_ring->count;
849 static irqreturn_t igbvf_msix_other(int irq, void *data)
851 struct net_device *netdev = data;
852 struct igbvf_adapter *adapter = netdev_priv(netdev);
853 struct e1000_hw *hw = &adapter->hw;
855 adapter->int_counter1++;
857 hw->mac.get_link_status = 1;
858 if (!test_bit(__IGBVF_DOWN, &adapter->state))
859 mod_timer(&adapter->watchdog_timer, jiffies + 1);
861 ew32(EIMS, adapter->eims_other);
866 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
868 struct net_device *netdev = data;
869 struct igbvf_adapter *adapter = netdev_priv(netdev);
870 struct e1000_hw *hw = &adapter->hw;
871 struct igbvf_ring *tx_ring = adapter->tx_ring;
873 if (tx_ring->set_itr) {
874 writel(tx_ring->itr_val,
875 adapter->hw.hw_addr + tx_ring->itr_register);
876 adapter->tx_ring->set_itr = 0;
879 adapter->total_tx_bytes = 0;
880 adapter->total_tx_packets = 0;
882 /* auto mask will automatically re-enable the interrupt when we write
885 if (!igbvf_clean_tx_irq(tx_ring))
886 /* Ring was not completely cleaned, so fire another interrupt */
887 ew32(EICS, tx_ring->eims_value);
889 ew32(EIMS, tx_ring->eims_value);
894 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
896 struct net_device *netdev = data;
897 struct igbvf_adapter *adapter = netdev_priv(netdev);
899 adapter->int_counter0++;
901 /* Write the ITR value calculated at the end of the
902 * previous interrupt.
904 if (adapter->rx_ring->set_itr) {
905 writel(adapter->rx_ring->itr_val,
906 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
907 adapter->rx_ring->set_itr = 0;
910 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
911 adapter->total_rx_bytes = 0;
912 adapter->total_rx_packets = 0;
913 __napi_schedule(&adapter->rx_ring->napi);
919 #define IGBVF_NO_QUEUE -1
921 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
922 int tx_queue, int msix_vector)
924 struct e1000_hw *hw = &adapter->hw;
927 /* 82576 uses a table-based method for assigning vectors.
928 * Each queue has a single entry in the table to which we write
929 * a vector number along with a "valid" bit. Sadly, the layout
930 * of the table is somewhat counterintuitive.
932 if (rx_queue > IGBVF_NO_QUEUE) {
933 index = (rx_queue >> 1);
934 ivar = array_er32(IVAR0, index);
935 if (rx_queue & 0x1) {
936 /* vector goes into third byte of register */
937 ivar = ivar & 0xFF00FFFF;
938 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
940 /* vector goes into low byte of register */
941 ivar = ivar & 0xFFFFFF00;
942 ivar |= msix_vector | E1000_IVAR_VALID;
944 adapter->rx_ring[rx_queue].eims_value = BIT(msix_vector);
945 array_ew32(IVAR0, index, ivar);
947 if (tx_queue > IGBVF_NO_QUEUE) {
948 index = (tx_queue >> 1);
949 ivar = array_er32(IVAR0, index);
950 if (tx_queue & 0x1) {
951 /* vector goes into high byte of register */
952 ivar = ivar & 0x00FFFFFF;
953 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
955 /* vector goes into second byte of register */
956 ivar = ivar & 0xFFFF00FF;
957 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
959 adapter->tx_ring[tx_queue].eims_value = BIT(msix_vector);
960 array_ew32(IVAR0, index, ivar);
965 * igbvf_configure_msix - Configure MSI-X hardware
966 * @adapter: board private structure
968 * igbvf_configure_msix sets up the hardware to properly
969 * generate MSI-X interrupts.
971 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
974 struct e1000_hw *hw = &adapter->hw;
975 struct igbvf_ring *tx_ring = adapter->tx_ring;
976 struct igbvf_ring *rx_ring = adapter->rx_ring;
979 adapter->eims_enable_mask = 0;
981 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
982 adapter->eims_enable_mask |= tx_ring->eims_value;
983 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register);
984 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
985 adapter->eims_enable_mask |= rx_ring->eims_value;
986 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register);
988 /* set vector for other causes, i.e. link changes */
990 tmp = (vector++ | E1000_IVAR_VALID);
992 ew32(IVAR_MISC, tmp);
994 adapter->eims_enable_mask = GENMASK(vector - 1, 0);
995 adapter->eims_other = BIT(vector - 1);
999 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
1001 if (adapter->msix_entries) {
1002 pci_disable_msix(adapter->pdev);
1003 kfree(adapter->msix_entries);
1004 adapter->msix_entries = NULL;
1009 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1010 * @adapter: board private structure
1012 * Attempt to configure interrupts using the best available
1013 * capabilities of the hardware and kernel.
1015 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1020 /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */
1021 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1023 if (adapter->msix_entries) {
1024 for (i = 0; i < 3; i++)
1025 adapter->msix_entries[i].entry = i;
1027 err = pci_enable_msix_range(adapter->pdev,
1028 adapter->msix_entries, 3, 3);
1033 dev_err(&adapter->pdev->dev,
1034 "Failed to initialize MSI-X interrupts.\n");
1035 igbvf_reset_interrupt_capability(adapter);
1040 * igbvf_request_msix - Initialize MSI-X interrupts
1041 * @adapter: board private structure
1043 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1046 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1048 struct net_device *netdev = adapter->netdev;
1049 int err = 0, vector = 0;
1051 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1052 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1053 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1055 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1056 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1059 err = request_irq(adapter->msix_entries[vector].vector,
1060 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1065 adapter->tx_ring->itr_register = E1000_EITR(vector);
1066 adapter->tx_ring->itr_val = adapter->current_itr;
1069 err = request_irq(adapter->msix_entries[vector].vector,
1070 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1075 adapter->rx_ring->itr_register = E1000_EITR(vector);
1076 adapter->rx_ring->itr_val = adapter->current_itr;
1079 err = request_irq(adapter->msix_entries[vector].vector,
1080 igbvf_msix_other, 0, netdev->name, netdev);
1084 igbvf_configure_msix(adapter);
1091 * igbvf_alloc_queues - Allocate memory for all rings
1092 * @adapter: board private structure to initialize
1094 static int igbvf_alloc_queues(struct igbvf_adapter *adapter)
1096 struct net_device *netdev = adapter->netdev;
1098 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1099 if (!adapter->tx_ring)
1102 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1103 if (!adapter->rx_ring) {
1104 kfree(adapter->tx_ring);
1108 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1114 * igbvf_request_irq - initialize interrupts
1115 * @adapter: board private structure
1117 * Attempts to configure interrupts using the best available
1118 * capabilities of the hardware and kernel.
1120 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1124 /* igbvf supports msi-x only */
1125 if (adapter->msix_entries)
1126 err = igbvf_request_msix(adapter);
1131 dev_err(&adapter->pdev->dev,
1132 "Unable to allocate interrupt, Error: %d\n", err);
1137 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1139 struct net_device *netdev = adapter->netdev;
1142 if (adapter->msix_entries) {
1143 for (vector = 0; vector < 3; vector++)
1144 free_irq(adapter->msix_entries[vector].vector, netdev);
1149 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1150 * @adapter: board private structure
1152 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1154 struct e1000_hw *hw = &adapter->hw;
1158 if (adapter->msix_entries)
1163 * igbvf_irq_enable - Enable default interrupt generation settings
1164 * @adapter: board private structure
1166 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1168 struct e1000_hw *hw = &adapter->hw;
1170 ew32(EIAC, adapter->eims_enable_mask);
1171 ew32(EIAM, adapter->eims_enable_mask);
1172 ew32(EIMS, adapter->eims_enable_mask);
1176 * igbvf_poll - NAPI Rx polling callback
1177 * @napi: struct associated with this polling callback
1178 * @budget: amount of packets driver is allowed to process this poll
1180 static int igbvf_poll(struct napi_struct *napi, int budget)
1182 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1183 struct igbvf_adapter *adapter = rx_ring->adapter;
1184 struct e1000_hw *hw = &adapter->hw;
1187 igbvf_clean_rx_irq(adapter, &work_done, budget);
1189 /* If not enough Rx work done, exit the polling mode */
1190 if (work_done < budget) {
1191 napi_complete_done(napi, work_done);
1193 if (adapter->requested_itr & 3)
1194 igbvf_set_itr(adapter);
1196 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1197 ew32(EIMS, adapter->rx_ring->eims_value);
1204 * igbvf_set_rlpml - set receive large packet maximum length
1205 * @adapter: board private structure
1207 * Configure the maximum size of packets that will be received
1209 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1212 struct e1000_hw *hw = &adapter->hw;
1214 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1216 spin_lock_bh(&hw->mbx_lock);
1218 e1000_rlpml_set_vf(hw, max_frame_size);
1220 spin_unlock_bh(&hw->mbx_lock);
1223 static int igbvf_vlan_rx_add_vid(struct net_device *netdev,
1224 __be16 proto, u16 vid)
1226 struct igbvf_adapter *adapter = netdev_priv(netdev);
1227 struct e1000_hw *hw = &adapter->hw;
1229 spin_lock_bh(&hw->mbx_lock);
1231 if (hw->mac.ops.set_vfta(hw, vid, true)) {
1232 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1233 spin_unlock_bh(&hw->mbx_lock);
1237 spin_unlock_bh(&hw->mbx_lock);
1239 set_bit(vid, adapter->active_vlans);
1243 static int igbvf_vlan_rx_kill_vid(struct net_device *netdev,
1244 __be16 proto, u16 vid)
1246 struct igbvf_adapter *adapter = netdev_priv(netdev);
1247 struct e1000_hw *hw = &adapter->hw;
1249 spin_lock_bh(&hw->mbx_lock);
1251 if (hw->mac.ops.set_vfta(hw, vid, false)) {
1252 dev_err(&adapter->pdev->dev,
1253 "Failed to remove vlan id %d\n", vid);
1254 spin_unlock_bh(&hw->mbx_lock);
1258 spin_unlock_bh(&hw->mbx_lock);
1260 clear_bit(vid, adapter->active_vlans);
1264 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1268 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1269 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1273 * igbvf_configure_tx - Configure Transmit Unit after Reset
1274 * @adapter: board private structure
1276 * Configure the Tx unit of the MAC after a reset.
1278 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1280 struct e1000_hw *hw = &adapter->hw;
1281 struct igbvf_ring *tx_ring = adapter->tx_ring;
1283 u32 txdctl, dca_txctrl;
1285 /* disable transmits */
1286 txdctl = er32(TXDCTL(0));
1287 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1291 /* Setup the HW Tx Head and Tail descriptor pointers */
1292 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1293 tdba = tx_ring->dma;
1294 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1295 ew32(TDBAH(0), (tdba >> 32));
1298 tx_ring->head = E1000_TDH(0);
1299 tx_ring->tail = E1000_TDT(0);
1301 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1302 * MUST be delivered in order or it will completely screw up
1305 dca_txctrl = er32(DCA_TXCTRL(0));
1306 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1307 ew32(DCA_TXCTRL(0), dca_txctrl);
1309 /* enable transmits */
1310 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1311 ew32(TXDCTL(0), txdctl);
1313 /* Setup Transmit Descriptor Settings for eop descriptor */
1314 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1316 /* enable Report Status bit */
1317 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1321 * igbvf_setup_srrctl - configure the receive control registers
1322 * @adapter: Board private structure
1324 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1326 struct e1000_hw *hw = &adapter->hw;
1329 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1330 E1000_SRRCTL_BSIZEHDR_MASK |
1331 E1000_SRRCTL_BSIZEPKT_MASK);
1333 /* Enable queue drop to avoid head of line blocking */
1334 srrctl |= E1000_SRRCTL_DROP_EN;
1336 /* Setup buffer sizes */
1337 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1338 E1000_SRRCTL_BSIZEPKT_SHIFT;
1340 if (adapter->rx_buffer_len < 2048) {
1341 adapter->rx_ps_hdr_size = 0;
1342 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1344 adapter->rx_ps_hdr_size = 128;
1345 srrctl |= adapter->rx_ps_hdr_size <<
1346 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1347 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1350 ew32(SRRCTL(0), srrctl);
1354 * igbvf_configure_rx - Configure Receive Unit after Reset
1355 * @adapter: board private structure
1357 * Configure the Rx unit of the MAC after a reset.
1359 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1361 struct e1000_hw *hw = &adapter->hw;
1362 struct igbvf_ring *rx_ring = adapter->rx_ring;
1366 /* disable receives */
1367 rxdctl = er32(RXDCTL(0));
1368 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1372 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1373 * the Base and Length of the Rx Descriptor Ring
1375 rdba = rx_ring->dma;
1376 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1377 ew32(RDBAH(0), (rdba >> 32));
1378 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1379 rx_ring->head = E1000_RDH(0);
1380 rx_ring->tail = E1000_RDT(0);
1384 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1385 rxdctl &= 0xFFF00000;
1386 rxdctl |= IGBVF_RX_PTHRESH;
1387 rxdctl |= IGBVF_RX_HTHRESH << 8;
1388 rxdctl |= IGBVF_RX_WTHRESH << 16;
1390 igbvf_set_rlpml(adapter);
1392 /* enable receives */
1393 ew32(RXDCTL(0), rxdctl);
1397 * igbvf_set_multi - Multicast and Promiscuous mode set
1398 * @netdev: network interface device structure
1400 * The set_multi entry point is called whenever the multicast address
1401 * list or the network interface flags are updated. This routine is
1402 * responsible for configuring the hardware for proper multicast,
1403 * promiscuous mode, and all-multi behavior.
1405 static void igbvf_set_multi(struct net_device *netdev)
1407 struct igbvf_adapter *adapter = netdev_priv(netdev);
1408 struct e1000_hw *hw = &adapter->hw;
1409 struct netdev_hw_addr *ha;
1410 u8 *mta_list = NULL;
1413 if (!netdev_mc_empty(netdev)) {
1414 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN,
1420 /* prepare a packed array of only addresses. */
1422 netdev_for_each_mc_addr(ha, netdev)
1423 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1425 spin_lock_bh(&hw->mbx_lock);
1427 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1429 spin_unlock_bh(&hw->mbx_lock);
1434 * igbvf_set_uni - Configure unicast MAC filters
1435 * @netdev: network interface device structure
1437 * This routine is responsible for configuring the hardware for proper
1440 static int igbvf_set_uni(struct net_device *netdev)
1442 struct igbvf_adapter *adapter = netdev_priv(netdev);
1443 struct e1000_hw *hw = &adapter->hw;
1445 if (netdev_uc_count(netdev) > IGBVF_MAX_MAC_FILTERS) {
1446 pr_err("Too many unicast filters - No Space\n");
1450 spin_lock_bh(&hw->mbx_lock);
1452 /* Clear all unicast MAC filters */
1453 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_CLR, NULL);
1455 spin_unlock_bh(&hw->mbx_lock);
1457 if (!netdev_uc_empty(netdev)) {
1458 struct netdev_hw_addr *ha;
1460 /* Add MAC filters one by one */
1461 netdev_for_each_uc_addr(ha, netdev) {
1462 spin_lock_bh(&hw->mbx_lock);
1464 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_ADD,
1467 spin_unlock_bh(&hw->mbx_lock);
1475 static void igbvf_set_rx_mode(struct net_device *netdev)
1477 igbvf_set_multi(netdev);
1478 igbvf_set_uni(netdev);
1482 * igbvf_configure - configure the hardware for Rx and Tx
1483 * @adapter: private board structure
1485 static void igbvf_configure(struct igbvf_adapter *adapter)
1487 igbvf_set_rx_mode(adapter->netdev);
1489 igbvf_restore_vlan(adapter);
1491 igbvf_configure_tx(adapter);
1492 igbvf_setup_srrctl(adapter);
1493 igbvf_configure_rx(adapter);
1494 igbvf_alloc_rx_buffers(adapter->rx_ring,
1495 igbvf_desc_unused(adapter->rx_ring));
1498 /* igbvf_reset - bring the hardware into a known good state
1499 * @adapter: private board structure
1501 * This function boots the hardware and enables some settings that
1502 * require a configuration cycle of the hardware - those cannot be
1503 * set/changed during runtime. After reset the device needs to be
1504 * properly configured for Rx, Tx etc.
1506 static void igbvf_reset(struct igbvf_adapter *adapter)
1508 struct e1000_mac_info *mac = &adapter->hw.mac;
1509 struct net_device *netdev = adapter->netdev;
1510 struct e1000_hw *hw = &adapter->hw;
1512 spin_lock_bh(&hw->mbx_lock);
1514 /* Allow time for pending master requests to run */
1515 if (mac->ops.reset_hw(hw))
1516 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1518 mac->ops.init_hw(hw);
1520 spin_unlock_bh(&hw->mbx_lock);
1522 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1523 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1525 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1529 adapter->last_reset = jiffies;
1532 int igbvf_up(struct igbvf_adapter *adapter)
1534 struct e1000_hw *hw = &adapter->hw;
1536 /* hardware has been reset, we need to reload some things */
1537 igbvf_configure(adapter);
1539 clear_bit(__IGBVF_DOWN, &adapter->state);
1541 napi_enable(&adapter->rx_ring->napi);
1542 if (adapter->msix_entries)
1543 igbvf_configure_msix(adapter);
1545 /* Clear any pending interrupts. */
1547 igbvf_irq_enable(adapter);
1549 /* start the watchdog */
1550 hw->mac.get_link_status = 1;
1551 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1556 void igbvf_down(struct igbvf_adapter *adapter)
1558 struct net_device *netdev = adapter->netdev;
1559 struct e1000_hw *hw = &adapter->hw;
1562 /* signal that we're down so the interrupt handler does not
1563 * reschedule our watchdog timer
1565 set_bit(__IGBVF_DOWN, &adapter->state);
1567 /* disable receives in the hardware */
1568 rxdctl = er32(RXDCTL(0));
1569 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1571 netif_carrier_off(netdev);
1572 netif_stop_queue(netdev);
1574 /* disable transmits in the hardware */
1575 txdctl = er32(TXDCTL(0));
1576 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1578 /* flush both disables and wait for them to finish */
1582 napi_disable(&adapter->rx_ring->napi);
1584 igbvf_irq_disable(adapter);
1586 del_timer_sync(&adapter->watchdog_timer);
1588 /* record the stats before reset*/
1589 igbvf_update_stats(adapter);
1591 adapter->link_speed = 0;
1592 adapter->link_duplex = 0;
1594 igbvf_reset(adapter);
1595 igbvf_clean_tx_ring(adapter->tx_ring);
1596 igbvf_clean_rx_ring(adapter->rx_ring);
1599 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1602 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1603 usleep_range(1000, 2000);
1604 igbvf_down(adapter);
1606 clear_bit(__IGBVF_RESETTING, &adapter->state);
1610 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1611 * @adapter: board private structure to initialize
1613 * igbvf_sw_init initializes the Adapter private data structure.
1614 * Fields are initialized based on PCI device information and
1615 * OS network device settings (MTU size).
1617 static int igbvf_sw_init(struct igbvf_adapter *adapter)
1619 struct net_device *netdev = adapter->netdev;
1622 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1623 adapter->rx_ps_hdr_size = 0;
1624 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1625 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1627 adapter->tx_int_delay = 8;
1628 adapter->tx_abs_int_delay = 32;
1629 adapter->rx_int_delay = 0;
1630 adapter->rx_abs_int_delay = 8;
1631 adapter->requested_itr = 3;
1632 adapter->current_itr = IGBVF_START_ITR;
1634 /* Set various function pointers */
1635 adapter->ei->init_ops(&adapter->hw);
1637 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1641 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1645 igbvf_set_interrupt_capability(adapter);
1647 if (igbvf_alloc_queues(adapter))
1650 spin_lock_init(&adapter->tx_queue_lock);
1652 /* Explicitly disable IRQ since the NIC can be in any state. */
1653 igbvf_irq_disable(adapter);
1655 spin_lock_init(&adapter->stats_lock);
1656 spin_lock_init(&adapter->hw.mbx_lock);
1658 set_bit(__IGBVF_DOWN, &adapter->state);
1662 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1664 struct e1000_hw *hw = &adapter->hw;
1666 adapter->stats.last_gprc = er32(VFGPRC);
1667 adapter->stats.last_gorc = er32(VFGORC);
1668 adapter->stats.last_gptc = er32(VFGPTC);
1669 adapter->stats.last_gotc = er32(VFGOTC);
1670 adapter->stats.last_mprc = er32(VFMPRC);
1671 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1672 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1673 adapter->stats.last_gorlbc = er32(VFGORLBC);
1674 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1676 adapter->stats.base_gprc = er32(VFGPRC);
1677 adapter->stats.base_gorc = er32(VFGORC);
1678 adapter->stats.base_gptc = er32(VFGPTC);
1679 adapter->stats.base_gotc = er32(VFGOTC);
1680 adapter->stats.base_mprc = er32(VFMPRC);
1681 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1682 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1683 adapter->stats.base_gorlbc = er32(VFGORLBC);
1684 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1688 * igbvf_open - Called when a network interface is made active
1689 * @netdev: network interface device structure
1691 * Returns 0 on success, negative value on failure
1693 * The open entry point is called when a network interface is made
1694 * active by the system (IFF_UP). At this point all resources needed
1695 * for transmit and receive operations are allocated, the interrupt
1696 * handler is registered with the OS, the watchdog timer is started,
1697 * and the stack is notified that the interface is ready.
1699 static int igbvf_open(struct net_device *netdev)
1701 struct igbvf_adapter *adapter = netdev_priv(netdev);
1702 struct e1000_hw *hw = &adapter->hw;
1705 /* disallow open during test */
1706 if (test_bit(__IGBVF_TESTING, &adapter->state))
1709 /* allocate transmit descriptors */
1710 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1714 /* allocate receive descriptors */
1715 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1719 /* before we allocate an interrupt, we must be ready to handle it.
1720 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1721 * as soon as we call pci_request_irq, so we have to setup our
1722 * clean_rx handler before we do so.
1724 igbvf_configure(adapter);
1726 err = igbvf_request_irq(adapter);
1730 /* From here on the code is the same as igbvf_up() */
1731 clear_bit(__IGBVF_DOWN, &adapter->state);
1733 napi_enable(&adapter->rx_ring->napi);
1735 /* clear any pending interrupts */
1738 igbvf_irq_enable(adapter);
1740 /* start the watchdog */
1741 hw->mac.get_link_status = 1;
1742 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1747 igbvf_free_rx_resources(adapter->rx_ring);
1749 igbvf_free_tx_resources(adapter->tx_ring);
1751 igbvf_reset(adapter);
1757 * igbvf_close - Disables a network interface
1758 * @netdev: network interface device structure
1760 * Returns 0, this is not allowed to fail
1762 * The close entry point is called when an interface is de-activated
1763 * by the OS. The hardware is still under the drivers control, but
1764 * needs to be disabled. A global MAC reset is issued to stop the
1765 * hardware, and all transmit and receive resources are freed.
1767 static int igbvf_close(struct net_device *netdev)
1769 struct igbvf_adapter *adapter = netdev_priv(netdev);
1771 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1772 igbvf_down(adapter);
1774 igbvf_free_irq(adapter);
1776 igbvf_free_tx_resources(adapter->tx_ring);
1777 igbvf_free_rx_resources(adapter->rx_ring);
1783 * igbvf_set_mac - Change the Ethernet Address of the NIC
1784 * @netdev: network interface device structure
1785 * @p: pointer to an address structure
1787 * Returns 0 on success, negative on failure
1789 static int igbvf_set_mac(struct net_device *netdev, void *p)
1791 struct igbvf_adapter *adapter = netdev_priv(netdev);
1792 struct e1000_hw *hw = &adapter->hw;
1793 struct sockaddr *addr = p;
1795 if (!is_valid_ether_addr(addr->sa_data))
1796 return -EADDRNOTAVAIL;
1798 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1800 spin_lock_bh(&hw->mbx_lock);
1802 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1804 spin_unlock_bh(&hw->mbx_lock);
1806 if (!ether_addr_equal(addr->sa_data, hw->mac.addr))
1807 return -EADDRNOTAVAIL;
1809 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1814 #define UPDATE_VF_COUNTER(reg, name) \
1816 u32 current_counter = er32(reg); \
1817 if (current_counter < adapter->stats.last_##name) \
1818 adapter->stats.name += 0x100000000LL; \
1819 adapter->stats.last_##name = current_counter; \
1820 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1821 adapter->stats.name |= current_counter; \
1825 * igbvf_update_stats - Update the board statistics counters
1826 * @adapter: board private structure
1828 void igbvf_update_stats(struct igbvf_adapter *adapter)
1830 struct e1000_hw *hw = &adapter->hw;
1831 struct pci_dev *pdev = adapter->pdev;
1833 /* Prevent stats update while adapter is being reset, link is down
1834 * or if the pci connection is down.
1836 if (adapter->link_speed == 0)
1839 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1842 if (pci_channel_offline(pdev))
1845 UPDATE_VF_COUNTER(VFGPRC, gprc);
1846 UPDATE_VF_COUNTER(VFGORC, gorc);
1847 UPDATE_VF_COUNTER(VFGPTC, gptc);
1848 UPDATE_VF_COUNTER(VFGOTC, gotc);
1849 UPDATE_VF_COUNTER(VFMPRC, mprc);
1850 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1851 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1852 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1853 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1855 /* Fill out the OS statistics structure */
1856 adapter->netdev->stats.multicast = adapter->stats.mprc;
1859 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1861 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1862 adapter->link_speed,
1863 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1866 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1868 struct e1000_hw *hw = &adapter->hw;
1869 s32 ret_val = E1000_SUCCESS;
1872 /* If interface is down, stay link down */
1873 if (test_bit(__IGBVF_DOWN, &adapter->state))
1876 spin_lock_bh(&hw->mbx_lock);
1878 ret_val = hw->mac.ops.check_for_link(hw);
1880 spin_unlock_bh(&hw->mbx_lock);
1882 link_active = !hw->mac.get_link_status;
1884 /* if check for link returns error we will need to reset */
1885 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1886 schedule_work(&adapter->reset_task);
1892 * igbvf_watchdog - Timer Call-back
1893 * @data: pointer to adapter cast into an unsigned long
1895 static void igbvf_watchdog(struct timer_list *t)
1897 struct igbvf_adapter *adapter = from_timer(adapter, t, watchdog_timer);
1899 /* Do the rest outside of interrupt context */
1900 schedule_work(&adapter->watchdog_task);
1903 static void igbvf_watchdog_task(struct work_struct *work)
1905 struct igbvf_adapter *adapter = container_of(work,
1906 struct igbvf_adapter,
1908 struct net_device *netdev = adapter->netdev;
1909 struct e1000_mac_info *mac = &adapter->hw.mac;
1910 struct igbvf_ring *tx_ring = adapter->tx_ring;
1911 struct e1000_hw *hw = &adapter->hw;
1915 link = igbvf_has_link(adapter);
1918 if (!netif_carrier_ok(netdev)) {
1919 mac->ops.get_link_up_info(&adapter->hw,
1920 &adapter->link_speed,
1921 &adapter->link_duplex);
1922 igbvf_print_link_info(adapter);
1924 netif_carrier_on(netdev);
1925 netif_wake_queue(netdev);
1928 if (netif_carrier_ok(netdev)) {
1929 adapter->link_speed = 0;
1930 adapter->link_duplex = 0;
1931 dev_info(&adapter->pdev->dev, "Link is Down\n");
1932 netif_carrier_off(netdev);
1933 netif_stop_queue(netdev);
1937 if (netif_carrier_ok(netdev)) {
1938 igbvf_update_stats(adapter);
1940 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1943 /* We've lost link, so the controller stops DMA,
1944 * but we've got queued Tx work that's never going
1945 * to get done, so reset controller to flush Tx.
1946 * (Do the reset outside of interrupt context).
1948 adapter->tx_timeout_count++;
1949 schedule_work(&adapter->reset_task);
1953 /* Cause software interrupt to ensure Rx ring is cleaned */
1954 ew32(EICS, adapter->rx_ring->eims_value);
1956 /* Reset the timer */
1957 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1958 mod_timer(&adapter->watchdog_timer,
1959 round_jiffies(jiffies + (2 * HZ)));
1962 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1963 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1964 #define IGBVF_TX_FLAGS_TSO 0x00000004
1965 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1966 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1967 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1969 static void igbvf_tx_ctxtdesc(struct igbvf_ring *tx_ring, u32 vlan_macip_lens,
1970 u32 type_tucmd, u32 mss_l4len_idx)
1972 struct e1000_adv_tx_context_desc *context_desc;
1973 struct igbvf_buffer *buffer_info;
1974 u16 i = tx_ring->next_to_use;
1976 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1977 buffer_info = &tx_ring->buffer_info[i];
1980 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
1982 /* set bits to identify this as an advanced context descriptor */
1983 type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT;
1985 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
1986 context_desc->seqnum_seed = 0;
1987 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
1988 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1990 buffer_info->time_stamp = jiffies;
1991 buffer_info->dma = 0;
1994 static int igbvf_tso(struct igbvf_ring *tx_ring,
1995 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1997 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
2007 u32 paylen, l4_offset;
2010 if (skb->ip_summed != CHECKSUM_PARTIAL)
2013 if (!skb_is_gso(skb))
2016 err = skb_cow_head(skb, 0);
2020 ip.hdr = skb_network_header(skb);
2021 l4.hdr = skb_checksum_start(skb);
2023 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2024 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2026 /* initialize outer IP header fields */
2027 if (ip.v4->version == 4) {
2028 unsigned char *csum_start = skb_checksum_start(skb);
2029 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
2031 /* IP header will have to cancel out any data that
2032 * is not a part of the outer IP header
2034 ip.v4->check = csum_fold(csum_partial(trans_start,
2035 csum_start - trans_start,
2037 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
2041 ip.v6->payload_len = 0;
2044 /* determine offset of inner transport header */
2045 l4_offset = l4.hdr - skb->data;
2047 /* compute length of segmentation header */
2048 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
2050 /* remove payload length from inner checksum */
2051 paylen = skb->len - l4_offset;
2052 csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
2055 mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT;
2056 mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT;
2058 /* VLAN MACLEN IPLEN */
2059 vlan_macip_lens = l4.hdr - ip.hdr;
2060 vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT;
2061 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2063 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
2068 static inline bool igbvf_ipv6_csum_is_sctp(struct sk_buff *skb)
2070 unsigned int offset = 0;
2072 ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
2074 return offset == skb_checksum_start_offset(skb);
2077 static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
2078 u32 tx_flags, __be16 protocol)
2080 u32 vlan_macip_lens = 0;
2083 if (skb->ip_summed != CHECKSUM_PARTIAL) {
2085 if (!(tx_flags & IGBVF_TX_FLAGS_VLAN))
2090 switch (skb->csum_offset) {
2091 case offsetof(struct tcphdr, check):
2092 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2094 case offsetof(struct udphdr, check):
2096 case offsetof(struct sctphdr, checksum):
2097 /* validate that this is actually an SCTP request */
2098 if (((protocol == htons(ETH_P_IP)) &&
2099 (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
2100 ((protocol == htons(ETH_P_IPV6)) &&
2101 igbvf_ipv6_csum_is_sctp(skb))) {
2102 type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
2106 skb_checksum_help(skb);
2110 vlan_macip_lens = skb_checksum_start_offset(skb) -
2111 skb_network_offset(skb);
2113 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
2114 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2116 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
2120 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2122 struct igbvf_adapter *adapter = netdev_priv(netdev);
2124 /* there is enough descriptors then we don't need to worry */
2125 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2128 netif_stop_queue(netdev);
2130 /* Herbert's original patch had:
2131 * smp_mb__after_netif_stop_queue();
2132 * but since that doesn't exist yet, just open code it.
2136 /* We need to check again just in case room has been made available */
2137 if (igbvf_desc_unused(adapter->tx_ring) < size)
2140 netif_wake_queue(netdev);
2142 ++adapter->restart_queue;
2146 #define IGBVF_MAX_TXD_PWR 16
2147 #define IGBVF_MAX_DATA_PER_TXD (1u << IGBVF_MAX_TXD_PWR)
2149 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2150 struct igbvf_ring *tx_ring,
2151 struct sk_buff *skb)
2153 struct igbvf_buffer *buffer_info;
2154 struct pci_dev *pdev = adapter->pdev;
2155 unsigned int len = skb_headlen(skb);
2156 unsigned int count = 0, i;
2159 i = tx_ring->next_to_use;
2161 buffer_info = &tx_ring->buffer_info[i];
2162 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2163 buffer_info->length = len;
2164 /* set time_stamp *before* dma to help avoid a possible race */
2165 buffer_info->time_stamp = jiffies;
2166 buffer_info->mapped_as_page = false;
2167 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2169 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2172 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2173 const struct skb_frag_struct *frag;
2177 if (i == tx_ring->count)
2180 frag = &skb_shinfo(skb)->frags[f];
2181 len = skb_frag_size(frag);
2183 buffer_info = &tx_ring->buffer_info[i];
2184 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2185 buffer_info->length = len;
2186 buffer_info->time_stamp = jiffies;
2187 buffer_info->mapped_as_page = true;
2188 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2190 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2194 tx_ring->buffer_info[i].skb = skb;
2199 dev_err(&pdev->dev, "TX DMA map failed\n");
2201 /* clear timestamp and dma mappings for failed buffer_info mapping */
2202 buffer_info->dma = 0;
2203 buffer_info->time_stamp = 0;
2204 buffer_info->length = 0;
2205 buffer_info->mapped_as_page = false;
2209 /* clear timestamp and dma mappings for remaining portion of packet */
2212 i += tx_ring->count;
2214 buffer_info = &tx_ring->buffer_info[i];
2215 igbvf_put_txbuf(adapter, buffer_info);
2221 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2222 struct igbvf_ring *tx_ring,
2223 int tx_flags, int count,
2224 unsigned int first, u32 paylen,
2227 union e1000_adv_tx_desc *tx_desc = NULL;
2228 struct igbvf_buffer *buffer_info;
2229 u32 olinfo_status = 0, cmd_type_len;
2232 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2233 E1000_ADVTXD_DCMD_DEXT);
2235 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2236 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2238 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2239 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2241 /* insert tcp checksum */
2242 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2244 /* insert ip checksum */
2245 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2246 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2248 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2249 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2252 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2254 i = tx_ring->next_to_use;
2256 buffer_info = &tx_ring->buffer_info[i];
2257 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2258 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2259 tx_desc->read.cmd_type_len =
2260 cpu_to_le32(cmd_type_len | buffer_info->length);
2261 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2263 if (i == tx_ring->count)
2267 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2268 /* Force memory writes to complete before letting h/w
2269 * know there are new descriptors to fetch. (Only
2270 * applicable for weak-ordered memory model archs,
2275 tx_ring->buffer_info[first].next_to_watch = tx_desc;
2276 tx_ring->next_to_use = i;
2277 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2278 /* we need this if more than one processor can write to our tail
2279 * at a time, it synchronizes IO on IA64/Altix systems
2284 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2285 struct net_device *netdev,
2286 struct igbvf_ring *tx_ring)
2288 struct igbvf_adapter *adapter = netdev_priv(netdev);
2289 unsigned int first, tx_flags = 0;
2293 __be16 protocol = vlan_get_protocol(skb);
2295 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2296 dev_kfree_skb_any(skb);
2297 return NETDEV_TX_OK;
2300 if (skb->len <= 0) {
2301 dev_kfree_skb_any(skb);
2302 return NETDEV_TX_OK;
2305 /* need: count + 4 desc gap to keep tail from touching
2306 * + 2 desc gap to keep tail from touching head,
2307 * + 1 desc for skb->data,
2308 * + 1 desc for context descriptor,
2309 * head, otherwise try next time
2311 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2312 /* this is a hard error */
2313 return NETDEV_TX_BUSY;
2316 if (skb_vlan_tag_present(skb)) {
2317 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2318 tx_flags |= (skb_vlan_tag_get(skb) <<
2319 IGBVF_TX_FLAGS_VLAN_SHIFT);
2322 if (protocol == htons(ETH_P_IP))
2323 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2325 first = tx_ring->next_to_use;
2327 tso = igbvf_tso(tx_ring, skb, tx_flags, &hdr_len);
2328 if (unlikely(tso < 0)) {
2329 dev_kfree_skb_any(skb);
2330 return NETDEV_TX_OK;
2334 tx_flags |= IGBVF_TX_FLAGS_TSO;
2335 else if (igbvf_tx_csum(tx_ring, skb, tx_flags, protocol) &&
2336 (skb->ip_summed == CHECKSUM_PARTIAL))
2337 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2339 /* count reflects descriptors mapped, if 0 then mapping error
2340 * has occurred and we need to rewind the descriptor queue
2342 count = igbvf_tx_map_adv(adapter, tx_ring, skb);
2345 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2346 first, skb->len, hdr_len);
2347 /* Make sure there is space in the ring for the next send. */
2348 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2350 dev_kfree_skb_any(skb);
2351 tx_ring->buffer_info[first].time_stamp = 0;
2352 tx_ring->next_to_use = first;
2355 return NETDEV_TX_OK;
2358 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2359 struct net_device *netdev)
2361 struct igbvf_adapter *adapter = netdev_priv(netdev);
2362 struct igbvf_ring *tx_ring;
2364 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2365 dev_kfree_skb_any(skb);
2366 return NETDEV_TX_OK;
2369 tx_ring = &adapter->tx_ring[0];
2371 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2375 * igbvf_tx_timeout - Respond to a Tx Hang
2376 * @netdev: network interface device structure
2378 static void igbvf_tx_timeout(struct net_device *netdev)
2380 struct igbvf_adapter *adapter = netdev_priv(netdev);
2382 /* Do the reset outside of interrupt context */
2383 adapter->tx_timeout_count++;
2384 schedule_work(&adapter->reset_task);
2387 static void igbvf_reset_task(struct work_struct *work)
2389 struct igbvf_adapter *adapter;
2391 adapter = container_of(work, struct igbvf_adapter, reset_task);
2393 igbvf_reinit_locked(adapter);
2397 * igbvf_change_mtu - Change the Maximum Transfer Unit
2398 * @netdev: network interface device structure
2399 * @new_mtu: new value for maximum frame size
2401 * Returns 0 on success, negative on failure
2403 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2405 struct igbvf_adapter *adapter = netdev_priv(netdev);
2406 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2408 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2409 usleep_range(1000, 2000);
2410 /* igbvf_down has a dependency on max_frame_size */
2411 adapter->max_frame_size = max_frame;
2412 if (netif_running(netdev))
2413 igbvf_down(adapter);
2415 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2416 * means we reserve 2 more, this pushes us to allocate from the next
2418 * i.e. RXBUFFER_2048 --> size-4096 slab
2419 * However with the new *_jumbo_rx* routines, jumbo receives will use
2423 if (max_frame <= 1024)
2424 adapter->rx_buffer_len = 1024;
2425 else if (max_frame <= 2048)
2426 adapter->rx_buffer_len = 2048;
2428 #if (PAGE_SIZE / 2) > 16384
2429 adapter->rx_buffer_len = 16384;
2431 adapter->rx_buffer_len = PAGE_SIZE / 2;
2434 /* adjust allocation if LPE protects us, and we aren't using SBP */
2435 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2436 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2437 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2440 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2441 netdev->mtu, new_mtu);
2442 netdev->mtu = new_mtu;
2444 if (netif_running(netdev))
2447 igbvf_reset(adapter);
2449 clear_bit(__IGBVF_RESETTING, &adapter->state);
2454 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2462 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2464 struct net_device *netdev = pci_get_drvdata(pdev);
2465 struct igbvf_adapter *adapter = netdev_priv(netdev);
2470 netif_device_detach(netdev);
2472 if (netif_running(netdev)) {
2473 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2474 igbvf_down(adapter);
2475 igbvf_free_irq(adapter);
2479 retval = pci_save_state(pdev);
2484 pci_disable_device(pdev);
2490 static int igbvf_resume(struct pci_dev *pdev)
2492 struct net_device *netdev = pci_get_drvdata(pdev);
2493 struct igbvf_adapter *adapter = netdev_priv(netdev);
2496 pci_restore_state(pdev);
2497 err = pci_enable_device_mem(pdev);
2499 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2503 pci_set_master(pdev);
2505 if (netif_running(netdev)) {
2506 err = igbvf_request_irq(adapter);
2511 igbvf_reset(adapter);
2513 if (netif_running(netdev))
2516 netif_device_attach(netdev);
2522 static void igbvf_shutdown(struct pci_dev *pdev)
2524 igbvf_suspend(pdev, PMSG_SUSPEND);
2527 #ifdef CONFIG_NET_POLL_CONTROLLER
2528 /* Polling 'interrupt' - used by things like netconsole to send skbs
2529 * without having to re-enable interrupts. It's not called while
2530 * the interrupt routine is executing.
2532 static void igbvf_netpoll(struct net_device *netdev)
2534 struct igbvf_adapter *adapter = netdev_priv(netdev);
2536 disable_irq(adapter->pdev->irq);
2538 igbvf_clean_tx_irq(adapter->tx_ring);
2540 enable_irq(adapter->pdev->irq);
2545 * igbvf_io_error_detected - called when PCI error is detected
2546 * @pdev: Pointer to PCI device
2547 * @state: The current pci connection state
2549 * This function is called after a PCI bus error affecting
2550 * this device has been detected.
2552 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2553 pci_channel_state_t state)
2555 struct net_device *netdev = pci_get_drvdata(pdev);
2556 struct igbvf_adapter *adapter = netdev_priv(netdev);
2558 netif_device_detach(netdev);
2560 if (state == pci_channel_io_perm_failure)
2561 return PCI_ERS_RESULT_DISCONNECT;
2563 if (netif_running(netdev))
2564 igbvf_down(adapter);
2565 pci_disable_device(pdev);
2567 /* Request a slot slot reset. */
2568 return PCI_ERS_RESULT_NEED_RESET;
2572 * igbvf_io_slot_reset - called after the pci bus has been reset.
2573 * @pdev: Pointer to PCI device
2575 * Restart the card from scratch, as if from a cold-boot. Implementation
2576 * resembles the first-half of the igbvf_resume routine.
2578 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2580 struct net_device *netdev = pci_get_drvdata(pdev);
2581 struct igbvf_adapter *adapter = netdev_priv(netdev);
2583 if (pci_enable_device_mem(pdev)) {
2585 "Cannot re-enable PCI device after reset.\n");
2586 return PCI_ERS_RESULT_DISCONNECT;
2588 pci_set_master(pdev);
2590 igbvf_reset(adapter);
2592 return PCI_ERS_RESULT_RECOVERED;
2596 * igbvf_io_resume - called when traffic can start flowing again.
2597 * @pdev: Pointer to PCI device
2599 * This callback is called when the error recovery driver tells us that
2600 * its OK to resume normal operation. Implementation resembles the
2601 * second-half of the igbvf_resume routine.
2603 static void igbvf_io_resume(struct pci_dev *pdev)
2605 struct net_device *netdev = pci_get_drvdata(pdev);
2606 struct igbvf_adapter *adapter = netdev_priv(netdev);
2608 if (netif_running(netdev)) {
2609 if (igbvf_up(adapter)) {
2611 "can't bring device back up after reset\n");
2616 netif_device_attach(netdev);
2619 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2621 struct e1000_hw *hw = &adapter->hw;
2622 struct net_device *netdev = adapter->netdev;
2623 struct pci_dev *pdev = adapter->pdev;
2625 if (hw->mac.type == e1000_vfadapt_i350)
2626 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2628 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2629 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2632 static int igbvf_set_features(struct net_device *netdev,
2633 netdev_features_t features)
2635 struct igbvf_adapter *adapter = netdev_priv(netdev);
2637 if (features & NETIF_F_RXCSUM)
2638 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2640 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2645 #define IGBVF_MAX_MAC_HDR_LEN 127
2646 #define IGBVF_MAX_NETWORK_HDR_LEN 511
2648 static netdev_features_t
2649 igbvf_features_check(struct sk_buff *skb, struct net_device *dev,
2650 netdev_features_t features)
2652 unsigned int network_hdr_len, mac_hdr_len;
2654 /* Make certain the headers can be described by a context descriptor */
2655 mac_hdr_len = skb_network_header(skb) - skb->data;
2656 if (unlikely(mac_hdr_len > IGBVF_MAX_MAC_HDR_LEN))
2657 return features & ~(NETIF_F_HW_CSUM |
2659 NETIF_F_HW_VLAN_CTAG_TX |
2663 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
2664 if (unlikely(network_hdr_len > IGBVF_MAX_NETWORK_HDR_LEN))
2665 return features & ~(NETIF_F_HW_CSUM |
2670 /* We can only support IPV4 TSO in tunnels if we can mangle the
2671 * inner IP ID field, so strip TSO if MANGLEID is not supported.
2673 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
2674 features &= ~NETIF_F_TSO;
2679 static const struct net_device_ops igbvf_netdev_ops = {
2680 .ndo_open = igbvf_open,
2681 .ndo_stop = igbvf_close,
2682 .ndo_start_xmit = igbvf_xmit_frame,
2683 .ndo_set_rx_mode = igbvf_set_rx_mode,
2684 .ndo_set_mac_address = igbvf_set_mac,
2685 .ndo_change_mtu = igbvf_change_mtu,
2686 .ndo_do_ioctl = igbvf_ioctl,
2687 .ndo_tx_timeout = igbvf_tx_timeout,
2688 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2689 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2690 #ifdef CONFIG_NET_POLL_CONTROLLER
2691 .ndo_poll_controller = igbvf_netpoll,
2693 .ndo_set_features = igbvf_set_features,
2694 .ndo_features_check = igbvf_features_check,
2698 * igbvf_probe - Device Initialization Routine
2699 * @pdev: PCI device information struct
2700 * @ent: entry in igbvf_pci_tbl
2702 * Returns 0 on success, negative on failure
2704 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2705 * The OS initialization, configuring of the adapter private structure,
2706 * and a hardware reset occur.
2708 static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2710 struct net_device *netdev;
2711 struct igbvf_adapter *adapter;
2712 struct e1000_hw *hw;
2713 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2715 static int cards_found;
2716 int err, pci_using_dac;
2718 err = pci_enable_device_mem(pdev);
2723 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2727 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2730 "No usable DMA configuration, aborting\n");
2735 err = pci_request_regions(pdev, igbvf_driver_name);
2739 pci_set_master(pdev);
2742 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2744 goto err_alloc_etherdev;
2746 SET_NETDEV_DEV(netdev, &pdev->dev);
2748 pci_set_drvdata(pdev, netdev);
2749 adapter = netdev_priv(netdev);
2751 adapter->netdev = netdev;
2752 adapter->pdev = pdev;
2754 adapter->pba = ei->pba;
2755 adapter->flags = ei->flags;
2756 adapter->hw.back = adapter;
2757 adapter->hw.mac.type = ei->mac;
2758 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2760 /* PCI config space info */
2762 hw->vendor_id = pdev->vendor;
2763 hw->device_id = pdev->device;
2764 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2765 hw->subsystem_device_id = pdev->subsystem_device;
2766 hw->revision_id = pdev->revision;
2769 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2770 pci_resource_len(pdev, 0));
2772 if (!adapter->hw.hw_addr)
2775 if (ei->get_variants) {
2776 err = ei->get_variants(adapter);
2778 goto err_get_variants;
2781 /* setup adapter struct */
2782 err = igbvf_sw_init(adapter);
2786 /* construct the net_device struct */
2787 netdev->netdev_ops = &igbvf_netdev_ops;
2789 igbvf_set_ethtool_ops(netdev);
2790 netdev->watchdog_timeo = 5 * HZ;
2791 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2793 adapter->bd_number = cards_found++;
2795 netdev->hw_features = NETIF_F_SG |
2802 #define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
2803 NETIF_F_GSO_GRE_CSUM | \
2804 NETIF_F_GSO_IPXIP4 | \
2805 NETIF_F_GSO_IPXIP6 | \
2806 NETIF_F_GSO_UDP_TUNNEL | \
2807 NETIF_F_GSO_UDP_TUNNEL_CSUM)
2809 netdev->gso_partial_features = IGBVF_GSO_PARTIAL_FEATURES;
2810 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
2811 IGBVF_GSO_PARTIAL_FEATURES;
2813 netdev->features = netdev->hw_features;
2816 netdev->features |= NETIF_F_HIGHDMA;
2818 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
2819 netdev->mpls_features |= NETIF_F_HW_CSUM;
2820 netdev->hw_enc_features |= netdev->vlan_features;
2822 /* set this bit last since it cannot be part of vlan_features */
2823 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
2824 NETIF_F_HW_VLAN_CTAG_RX |
2825 NETIF_F_HW_VLAN_CTAG_TX;
2827 /* MTU range: 68 - 9216 */
2828 netdev->min_mtu = ETH_MIN_MTU;
2829 netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
2831 spin_lock_bh(&hw->mbx_lock);
2833 /*reset the controller to put the device in a known good state */
2834 err = hw->mac.ops.reset_hw(hw);
2836 dev_info(&pdev->dev,
2837 "PF still in reset state. Is the PF interface up?\n");
2839 err = hw->mac.ops.read_mac_addr(hw);
2841 dev_info(&pdev->dev, "Error reading MAC address.\n");
2842 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2843 dev_info(&pdev->dev,
2844 "MAC address not assigned by administrator.\n");
2845 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2849 spin_unlock_bh(&hw->mbx_lock);
2851 if (!is_valid_ether_addr(netdev->dev_addr)) {
2852 dev_info(&pdev->dev, "Assigning random MAC address.\n");
2853 eth_hw_addr_random(netdev);
2854 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2858 timer_setup(&adapter->watchdog_timer, igbvf_watchdog, 0);
2860 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2861 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2863 /* ring size defaults */
2864 adapter->rx_ring->count = 1024;
2865 adapter->tx_ring->count = 1024;
2867 /* reset the hardware with the new settings */
2868 igbvf_reset(adapter);
2870 /* set hardware-specific flags */
2871 if (adapter->hw.mac.type == e1000_vfadapt_i350)
2872 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP;
2874 strcpy(netdev->name, "eth%d");
2875 err = register_netdev(netdev);
2879 /* tell the stack to leave us alone until igbvf_open() is called */
2880 netif_carrier_off(netdev);
2881 netif_stop_queue(netdev);
2883 igbvf_print_device_info(adapter);
2885 igbvf_initialize_last_counter_stats(adapter);
2890 kfree(adapter->tx_ring);
2891 kfree(adapter->rx_ring);
2893 igbvf_reset_interrupt_capability(adapter);
2895 iounmap(adapter->hw.hw_addr);
2897 free_netdev(netdev);
2899 pci_release_regions(pdev);
2902 pci_disable_device(pdev);
2907 * igbvf_remove - Device Removal Routine
2908 * @pdev: PCI device information struct
2910 * igbvf_remove is called by the PCI subsystem to alert the driver
2911 * that it should release a PCI device. The could be caused by a
2912 * Hot-Plug event, or because the driver is going to be removed from
2915 static void igbvf_remove(struct pci_dev *pdev)
2917 struct net_device *netdev = pci_get_drvdata(pdev);
2918 struct igbvf_adapter *adapter = netdev_priv(netdev);
2919 struct e1000_hw *hw = &adapter->hw;
2921 /* The watchdog timer may be rescheduled, so explicitly
2922 * disable it from being rescheduled.
2924 set_bit(__IGBVF_DOWN, &adapter->state);
2925 del_timer_sync(&adapter->watchdog_timer);
2927 cancel_work_sync(&adapter->reset_task);
2928 cancel_work_sync(&adapter->watchdog_task);
2930 unregister_netdev(netdev);
2932 igbvf_reset_interrupt_capability(adapter);
2934 /* it is important to delete the NAPI struct prior to freeing the
2935 * Rx ring so that you do not end up with null pointer refs
2937 netif_napi_del(&adapter->rx_ring->napi);
2938 kfree(adapter->tx_ring);
2939 kfree(adapter->rx_ring);
2941 iounmap(hw->hw_addr);
2942 if (hw->flash_address)
2943 iounmap(hw->flash_address);
2944 pci_release_regions(pdev);
2946 free_netdev(netdev);
2948 pci_disable_device(pdev);
2951 /* PCI Error Recovery (ERS) */
2952 static const struct pci_error_handlers igbvf_err_handler = {
2953 .error_detected = igbvf_io_error_detected,
2954 .slot_reset = igbvf_io_slot_reset,
2955 .resume = igbvf_io_resume,
2958 static const struct pci_device_id igbvf_pci_tbl[] = {
2959 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2960 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2961 { } /* terminate list */
2963 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2965 /* PCI Device API Driver */
2966 static struct pci_driver igbvf_driver = {
2967 .name = igbvf_driver_name,
2968 .id_table = igbvf_pci_tbl,
2969 .probe = igbvf_probe,
2970 .remove = igbvf_remove,
2972 /* Power Management Hooks */
2973 .suspend = igbvf_suspend,
2974 .resume = igbvf_resume,
2976 .shutdown = igbvf_shutdown,
2977 .err_handler = &igbvf_err_handler
2981 * igbvf_init_module - Driver Registration Routine
2983 * igbvf_init_module is the first routine called when the driver is
2984 * loaded. All it does is register with the PCI subsystem.
2986 static int __init igbvf_init_module(void)
2990 pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version);
2991 pr_info("%s\n", igbvf_copyright);
2993 ret = pci_register_driver(&igbvf_driver);
2997 module_init(igbvf_init_module);
3000 * igbvf_exit_module - Driver Exit Cleanup Routine
3002 * igbvf_exit_module is called just before the driver is removed
3005 static void __exit igbvf_exit_module(void)
3007 pci_unregister_driver(&igbvf_driver);
3009 module_exit(igbvf_exit_module);
3011 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
3012 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
3013 MODULE_LICENSE("GPL");
3014 MODULE_VERSION(DRV_VERSION);