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 char igbvf_driver_name[] = "igbvf";
28 static const char igbvf_driver_string[] =
29 "Intel(R) Gigabit Virtual Function Network Driver";
30 static const char igbvf_copyright[] =
31 "Copyright (c) 2009 - 2012 Intel Corporation.";
33 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
34 static int debug = -1;
35 module_param(debug, int, 0);
36 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
38 static int igbvf_poll(struct napi_struct *napi, int budget);
39 static void igbvf_reset(struct igbvf_adapter *);
40 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
41 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
43 static struct igbvf_info igbvf_vf_info = {
47 .init_ops = e1000_init_function_pointers_vf,
50 static struct igbvf_info igbvf_i350_vf_info = {
51 .mac = e1000_vfadapt_i350,
54 .init_ops = e1000_init_function_pointers_vf,
57 static const struct igbvf_info *igbvf_info_tbl[] = {
58 [board_vf] = &igbvf_vf_info,
59 [board_i350_vf] = &igbvf_i350_vf_info,
63 * igbvf_desc_unused - calculate if we have unused descriptors
64 * @ring: address of receive ring structure
66 static int igbvf_desc_unused(struct igbvf_ring *ring)
68 if (ring->next_to_clean > ring->next_to_use)
69 return ring->next_to_clean - ring->next_to_use - 1;
71 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
75 * igbvf_receive_skb - helper function to handle Rx indications
76 * @adapter: board private structure
77 * @netdev: pointer to netdev struct
78 * @skb: skb to indicate to stack
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,
86 u32 status, __le16 vlan)
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((__force __be16)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
238 * @work_done: output parameter used to indicate completed work
239 * @work_to_do: input parameter setting limit of work
241 * the return value indicates whether actual cleaning was done, there
242 * is no guarantee that everything was cleaned
244 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
245 int *work_done, int work_to_do)
247 struct igbvf_ring *rx_ring = adapter->rx_ring;
248 struct net_device *netdev = adapter->netdev;
249 struct pci_dev *pdev = adapter->pdev;
250 union e1000_adv_rx_desc *rx_desc, *next_rxd;
251 struct igbvf_buffer *buffer_info, *next_buffer;
253 bool cleaned = false;
254 int cleaned_count = 0;
255 unsigned int total_bytes = 0, total_packets = 0;
257 u32 length, hlen, staterr;
259 i = rx_ring->next_to_clean;
260 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
261 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
263 while (staterr & E1000_RXD_STAT_DD) {
264 if (*work_done >= work_to_do)
267 rmb(); /* read descriptor and rx_buffer_info after status DD */
269 buffer_info = &rx_ring->buffer_info[i];
271 /* HW will not DMA in data larger than the given buffer, even
272 * if it parses the (NFS, of course) header to be larger. In
273 * that case, it fills the header buffer and spills the rest
276 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info)
277 & E1000_RXDADV_HDRBUFLEN_MASK) >>
278 E1000_RXDADV_HDRBUFLEN_SHIFT;
279 if (hlen > adapter->rx_ps_hdr_size)
280 hlen = adapter->rx_ps_hdr_size;
282 length = le16_to_cpu(rx_desc->wb.upper.length);
286 skb = buffer_info->skb;
287 prefetch(skb->data - NET_IP_ALIGN);
288 buffer_info->skb = NULL;
289 if (!adapter->rx_ps_hdr_size) {
290 dma_unmap_single(&pdev->dev, buffer_info->dma,
291 adapter->rx_buffer_len,
293 buffer_info->dma = 0;
294 skb_put(skb, length);
298 if (!skb_shinfo(skb)->nr_frags) {
299 dma_unmap_single(&pdev->dev, buffer_info->dma,
300 adapter->rx_ps_hdr_size,
302 buffer_info->dma = 0;
307 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
310 buffer_info->page_dma = 0;
312 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
314 buffer_info->page_offset,
317 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
318 (page_count(buffer_info->page) != 1))
319 buffer_info->page = NULL;
321 get_page(buffer_info->page);
324 skb->data_len += length;
325 skb->truesize += PAGE_SIZE / 2;
329 if (i == rx_ring->count)
331 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
333 next_buffer = &rx_ring->buffer_info[i];
335 if (!(staterr & E1000_RXD_STAT_EOP)) {
336 buffer_info->skb = next_buffer->skb;
337 buffer_info->dma = next_buffer->dma;
338 next_buffer->skb = skb;
339 next_buffer->dma = 0;
343 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
344 dev_kfree_skb_irq(skb);
348 total_bytes += skb->len;
351 igbvf_rx_checksum_adv(adapter, staterr, skb);
353 skb->protocol = eth_type_trans(skb, netdev);
355 igbvf_receive_skb(adapter, netdev, skb, staterr,
356 rx_desc->wb.upper.vlan);
359 rx_desc->wb.upper.status_error = 0;
361 /* return some buffers to hardware, one at a time is too slow */
362 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
363 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
367 /* use prefetched values */
369 buffer_info = next_buffer;
371 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
374 rx_ring->next_to_clean = i;
375 cleaned_count = igbvf_desc_unused(rx_ring);
378 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
380 adapter->total_rx_packets += total_packets;
381 adapter->total_rx_bytes += total_bytes;
382 netdev->stats.rx_bytes += total_bytes;
383 netdev->stats.rx_packets += total_packets;
387 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
388 struct igbvf_buffer *buffer_info)
390 if (buffer_info->dma) {
391 if (buffer_info->mapped_as_page)
392 dma_unmap_page(&adapter->pdev->dev,
397 dma_unmap_single(&adapter->pdev->dev,
401 buffer_info->dma = 0;
403 if (buffer_info->skb) {
404 dev_kfree_skb_any(buffer_info->skb);
405 buffer_info->skb = NULL;
407 buffer_info->time_stamp = 0;
411 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
412 * @adapter: board private structure
413 * @tx_ring: ring being initialized
415 * Return 0 on success, negative on failure
417 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
418 struct igbvf_ring *tx_ring)
420 struct pci_dev *pdev = adapter->pdev;
423 size = sizeof(struct igbvf_buffer) * tx_ring->count;
424 tx_ring->buffer_info = vzalloc(size);
425 if (!tx_ring->buffer_info)
428 /* round up to nearest 4K */
429 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
430 tx_ring->size = ALIGN(tx_ring->size, 4096);
432 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
433 &tx_ring->dma, GFP_KERNEL);
437 tx_ring->adapter = adapter;
438 tx_ring->next_to_use = 0;
439 tx_ring->next_to_clean = 0;
443 vfree(tx_ring->buffer_info);
444 dev_err(&adapter->pdev->dev,
445 "Unable to allocate memory for the transmit descriptor ring\n");
450 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
451 * @adapter: board private structure
452 * @rx_ring: ring being initialized
454 * Returns 0 on success, negative on failure
456 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
457 struct igbvf_ring *rx_ring)
459 struct pci_dev *pdev = adapter->pdev;
462 size = sizeof(struct igbvf_buffer) * rx_ring->count;
463 rx_ring->buffer_info = vzalloc(size);
464 if (!rx_ring->buffer_info)
467 desc_len = sizeof(union e1000_adv_rx_desc);
469 /* Round up to nearest 4K */
470 rx_ring->size = rx_ring->count * desc_len;
471 rx_ring->size = ALIGN(rx_ring->size, 4096);
473 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
474 &rx_ring->dma, GFP_KERNEL);
478 rx_ring->next_to_clean = 0;
479 rx_ring->next_to_use = 0;
481 rx_ring->adapter = adapter;
486 vfree(rx_ring->buffer_info);
487 rx_ring->buffer_info = NULL;
488 dev_err(&adapter->pdev->dev,
489 "Unable to allocate memory for the receive descriptor ring\n");
494 * igbvf_clean_tx_ring - Free Tx Buffers
495 * @tx_ring: ring to be cleaned
497 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
499 struct igbvf_adapter *adapter = tx_ring->adapter;
500 struct igbvf_buffer *buffer_info;
504 if (!tx_ring->buffer_info)
507 /* Free all the Tx ring sk_buffs */
508 for (i = 0; i < tx_ring->count; i++) {
509 buffer_info = &tx_ring->buffer_info[i];
510 igbvf_put_txbuf(adapter, buffer_info);
513 size = sizeof(struct igbvf_buffer) * tx_ring->count;
514 memset(tx_ring->buffer_info, 0, size);
516 /* Zero out the descriptor ring */
517 memset(tx_ring->desc, 0, tx_ring->size);
519 tx_ring->next_to_use = 0;
520 tx_ring->next_to_clean = 0;
522 writel(0, adapter->hw.hw_addr + tx_ring->head);
523 writel(0, adapter->hw.hw_addr + tx_ring->tail);
527 * igbvf_free_tx_resources - Free Tx Resources per Queue
528 * @tx_ring: ring to free resources from
530 * Free all transmit software resources
532 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
534 struct pci_dev *pdev = tx_ring->adapter->pdev;
536 igbvf_clean_tx_ring(tx_ring);
538 vfree(tx_ring->buffer_info);
539 tx_ring->buffer_info = NULL;
541 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
544 tx_ring->desc = NULL;
548 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
549 * @rx_ring: ring structure pointer to free buffers from
551 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
553 struct igbvf_adapter *adapter = rx_ring->adapter;
554 struct igbvf_buffer *buffer_info;
555 struct pci_dev *pdev = adapter->pdev;
559 if (!rx_ring->buffer_info)
562 /* Free all the Rx ring sk_buffs */
563 for (i = 0; i < rx_ring->count; i++) {
564 buffer_info = &rx_ring->buffer_info[i];
565 if (buffer_info->dma) {
566 if (adapter->rx_ps_hdr_size) {
567 dma_unmap_single(&pdev->dev, buffer_info->dma,
568 adapter->rx_ps_hdr_size,
571 dma_unmap_single(&pdev->dev, buffer_info->dma,
572 adapter->rx_buffer_len,
575 buffer_info->dma = 0;
578 if (buffer_info->skb) {
579 dev_kfree_skb(buffer_info->skb);
580 buffer_info->skb = NULL;
583 if (buffer_info->page) {
584 if (buffer_info->page_dma)
585 dma_unmap_page(&pdev->dev,
586 buffer_info->page_dma,
589 put_page(buffer_info->page);
590 buffer_info->page = NULL;
591 buffer_info->page_dma = 0;
592 buffer_info->page_offset = 0;
596 size = sizeof(struct igbvf_buffer) * rx_ring->count;
597 memset(rx_ring->buffer_info, 0, size);
599 /* Zero out the descriptor ring */
600 memset(rx_ring->desc, 0, rx_ring->size);
602 rx_ring->next_to_clean = 0;
603 rx_ring->next_to_use = 0;
605 writel(0, adapter->hw.hw_addr + rx_ring->head);
606 writel(0, adapter->hw.hw_addr + rx_ring->tail);
610 * igbvf_free_rx_resources - Free Rx Resources
611 * @rx_ring: ring to clean the resources from
613 * Free all receive software resources
616 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
618 struct pci_dev *pdev = rx_ring->adapter->pdev;
620 igbvf_clean_rx_ring(rx_ring);
622 vfree(rx_ring->buffer_info);
623 rx_ring->buffer_info = NULL;
625 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
627 rx_ring->desc = NULL;
631 * igbvf_update_itr - update the dynamic ITR value based on statistics
632 * @adapter: pointer to adapter
633 * @itr_setting: current adapter->itr
634 * @packets: the number of packets during this measurement interval
635 * @bytes: the number of bytes during this measurement interval
637 * Stores a new ITR value based on packets and byte counts during the last
638 * interrupt. The advantage of per interrupt computation is faster updates
639 * and more accurate ITR for the current traffic pattern. Constants in this
640 * function were computed based on theoretical maximum wire speed and thresholds
641 * were set based on testing data as well as attempting to minimize response
642 * time while increasing bulk throughput.
644 static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter,
645 enum latency_range itr_setting,
646 int packets, int bytes)
648 enum latency_range retval = itr_setting;
651 goto update_itr_done;
653 switch (itr_setting) {
655 /* handle TSO and jumbo frames */
656 if (bytes/packets > 8000)
657 retval = bulk_latency;
658 else if ((packets < 5) && (bytes > 512))
659 retval = low_latency;
661 case low_latency: /* 50 usec aka 20000 ints/s */
663 /* this if handles the TSO accounting */
664 if (bytes/packets > 8000)
665 retval = bulk_latency;
666 else if ((packets < 10) || ((bytes/packets) > 1200))
667 retval = bulk_latency;
668 else if ((packets > 35))
669 retval = lowest_latency;
670 } else if (bytes/packets > 2000) {
671 retval = bulk_latency;
672 } else if (packets <= 2 && bytes < 512) {
673 retval = lowest_latency;
676 case bulk_latency: /* 250 usec aka 4000 ints/s */
679 retval = low_latency;
680 } else if (bytes < 6000) {
681 retval = low_latency;
692 static int igbvf_range_to_itr(enum latency_range current_range)
696 switch (current_range) {
697 /* counts and packets in update_itr are dependent on these numbers */
699 new_itr = IGBVF_70K_ITR;
702 new_itr = IGBVF_20K_ITR;
705 new_itr = IGBVF_4K_ITR;
708 new_itr = IGBVF_START_ITR;
714 static void igbvf_set_itr(struct igbvf_adapter *adapter)
718 adapter->tx_ring->itr_range =
719 igbvf_update_itr(adapter,
720 adapter->tx_ring->itr_val,
721 adapter->total_tx_packets,
722 adapter->total_tx_bytes);
724 /* conservative mode (itr 3) eliminates the lowest_latency setting */
725 if (adapter->requested_itr == 3 &&
726 adapter->tx_ring->itr_range == lowest_latency)
727 adapter->tx_ring->itr_range = low_latency;
729 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range);
731 if (new_itr != adapter->tx_ring->itr_val) {
732 u32 current_itr = adapter->tx_ring->itr_val;
733 /* this attempts to bias the interrupt rate towards Bulk
734 * by adding intermediate steps when interrupt rate is
737 new_itr = new_itr > current_itr ?
738 min(current_itr + (new_itr >> 2), new_itr) :
740 adapter->tx_ring->itr_val = new_itr;
742 adapter->tx_ring->set_itr = 1;
745 adapter->rx_ring->itr_range =
746 igbvf_update_itr(adapter, adapter->rx_ring->itr_val,
747 adapter->total_rx_packets,
748 adapter->total_rx_bytes);
749 if (adapter->requested_itr == 3 &&
750 adapter->rx_ring->itr_range == lowest_latency)
751 adapter->rx_ring->itr_range = low_latency;
753 new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range);
755 if (new_itr != adapter->rx_ring->itr_val) {
756 u32 current_itr = adapter->rx_ring->itr_val;
758 new_itr = new_itr > current_itr ?
759 min(current_itr + (new_itr >> 2), new_itr) :
761 adapter->rx_ring->itr_val = new_itr;
763 adapter->rx_ring->set_itr = 1;
768 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
769 * @tx_ring: ring structure to clean descriptors from
771 * returns true if ring is completely cleaned
773 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
775 struct igbvf_adapter *adapter = tx_ring->adapter;
776 struct net_device *netdev = adapter->netdev;
777 struct igbvf_buffer *buffer_info;
779 union e1000_adv_tx_desc *tx_desc, *eop_desc;
780 unsigned int total_bytes = 0, total_packets = 0;
781 unsigned int i, count = 0;
782 bool cleaned = false;
784 i = tx_ring->next_to_clean;
785 buffer_info = &tx_ring->buffer_info[i];
786 eop_desc = buffer_info->next_to_watch;
789 /* if next_to_watch is not set then there is no work pending */
793 /* prevent any other reads prior to eop_desc */
796 /* if DD is not set pending work has not been completed */
797 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)))
800 /* clear next_to_watch to prevent false hangs */
801 buffer_info->next_to_watch = NULL;
803 for (cleaned = false; !cleaned; count++) {
804 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
805 cleaned = (tx_desc == eop_desc);
806 skb = buffer_info->skb;
809 unsigned int segs, bytecount;
811 /* gso_segs is currently only valid for tcp */
812 segs = skb_shinfo(skb)->gso_segs ?: 1;
813 /* multiply data chunks by size of headers */
814 bytecount = ((segs - 1) * skb_headlen(skb)) +
816 total_packets += segs;
817 total_bytes += bytecount;
820 igbvf_put_txbuf(adapter, buffer_info);
821 tx_desc->wb.status = 0;
824 if (i == tx_ring->count)
827 buffer_info = &tx_ring->buffer_info[i];
830 eop_desc = buffer_info->next_to_watch;
831 } while (count < tx_ring->count);
833 tx_ring->next_to_clean = i;
835 if (unlikely(count && netif_carrier_ok(netdev) &&
836 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
837 /* Make sure that anybody stopping the queue after this
838 * sees the new next_to_clean.
841 if (netif_queue_stopped(netdev) &&
842 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
843 netif_wake_queue(netdev);
844 ++adapter->restart_queue;
848 netdev->stats.tx_bytes += total_bytes;
849 netdev->stats.tx_packets += total_packets;
850 return count < tx_ring->count;
853 static irqreturn_t igbvf_msix_other(int irq, void *data)
855 struct net_device *netdev = data;
856 struct igbvf_adapter *adapter = netdev_priv(netdev);
857 struct e1000_hw *hw = &adapter->hw;
859 adapter->int_counter1++;
861 hw->mac.get_link_status = 1;
862 if (!test_bit(__IGBVF_DOWN, &adapter->state))
863 mod_timer(&adapter->watchdog_timer, jiffies + 1);
865 ew32(EIMS, adapter->eims_other);
870 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
872 struct net_device *netdev = data;
873 struct igbvf_adapter *adapter = netdev_priv(netdev);
874 struct e1000_hw *hw = &adapter->hw;
875 struct igbvf_ring *tx_ring = adapter->tx_ring;
877 if (tx_ring->set_itr) {
878 writel(tx_ring->itr_val,
879 adapter->hw.hw_addr + tx_ring->itr_register);
880 adapter->tx_ring->set_itr = 0;
883 adapter->total_tx_bytes = 0;
884 adapter->total_tx_packets = 0;
886 /* auto mask will automatically re-enable the interrupt when we write
889 if (!igbvf_clean_tx_irq(tx_ring))
890 /* Ring was not completely cleaned, so fire another interrupt */
891 ew32(EICS, tx_ring->eims_value);
893 ew32(EIMS, tx_ring->eims_value);
898 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
900 struct net_device *netdev = data;
901 struct igbvf_adapter *adapter = netdev_priv(netdev);
903 adapter->int_counter0++;
905 /* Write the ITR value calculated at the end of the
906 * previous interrupt.
908 if (adapter->rx_ring->set_itr) {
909 writel(adapter->rx_ring->itr_val,
910 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
911 adapter->rx_ring->set_itr = 0;
914 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
915 adapter->total_rx_bytes = 0;
916 adapter->total_rx_packets = 0;
917 __napi_schedule(&adapter->rx_ring->napi);
923 #define IGBVF_NO_QUEUE -1
925 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
926 int tx_queue, int msix_vector)
928 struct e1000_hw *hw = &adapter->hw;
931 /* 82576 uses a table-based method for assigning vectors.
932 * Each queue has a single entry in the table to which we write
933 * a vector number along with a "valid" bit. Sadly, the layout
934 * of the table is somewhat counterintuitive.
936 if (rx_queue > IGBVF_NO_QUEUE) {
937 index = (rx_queue >> 1);
938 ivar = array_er32(IVAR0, index);
939 if (rx_queue & 0x1) {
940 /* vector goes into third byte of register */
941 ivar = ivar & 0xFF00FFFF;
942 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
944 /* vector goes into low byte of register */
945 ivar = ivar & 0xFFFFFF00;
946 ivar |= msix_vector | E1000_IVAR_VALID;
948 adapter->rx_ring[rx_queue].eims_value = BIT(msix_vector);
949 array_ew32(IVAR0, index, ivar);
951 if (tx_queue > IGBVF_NO_QUEUE) {
952 index = (tx_queue >> 1);
953 ivar = array_er32(IVAR0, index);
954 if (tx_queue & 0x1) {
955 /* vector goes into high byte of register */
956 ivar = ivar & 0x00FFFFFF;
957 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
959 /* vector goes into second byte of register */
960 ivar = ivar & 0xFFFF00FF;
961 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
963 adapter->tx_ring[tx_queue].eims_value = BIT(msix_vector);
964 array_ew32(IVAR0, index, ivar);
969 * igbvf_configure_msix - Configure MSI-X hardware
970 * @adapter: board private structure
972 * igbvf_configure_msix sets up the hardware to properly
973 * generate MSI-X interrupts.
975 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
978 struct e1000_hw *hw = &adapter->hw;
979 struct igbvf_ring *tx_ring = adapter->tx_ring;
980 struct igbvf_ring *rx_ring = adapter->rx_ring;
983 adapter->eims_enable_mask = 0;
985 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
986 adapter->eims_enable_mask |= tx_ring->eims_value;
987 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register);
988 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
989 adapter->eims_enable_mask |= rx_ring->eims_value;
990 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register);
992 /* set vector for other causes, i.e. link changes */
994 tmp = (vector++ | E1000_IVAR_VALID);
996 ew32(IVAR_MISC, tmp);
998 adapter->eims_enable_mask = GENMASK(vector - 1, 0);
999 adapter->eims_other = BIT(vector - 1);
1003 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
1005 if (adapter->msix_entries) {
1006 pci_disable_msix(adapter->pdev);
1007 kfree(adapter->msix_entries);
1008 adapter->msix_entries = NULL;
1013 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1014 * @adapter: board private structure
1016 * Attempt to configure interrupts using the best available
1017 * capabilities of the hardware and kernel.
1019 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1024 /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */
1025 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1027 if (adapter->msix_entries) {
1028 for (i = 0; i < 3; i++)
1029 adapter->msix_entries[i].entry = i;
1031 err = pci_enable_msix_range(adapter->pdev,
1032 adapter->msix_entries, 3, 3);
1037 dev_err(&adapter->pdev->dev,
1038 "Failed to initialize MSI-X interrupts.\n");
1039 igbvf_reset_interrupt_capability(adapter);
1044 * igbvf_request_msix - Initialize MSI-X interrupts
1045 * @adapter: board private structure
1047 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1050 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1052 struct net_device *netdev = adapter->netdev;
1053 int err = 0, vector = 0;
1055 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1056 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1057 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1059 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1060 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1063 err = request_irq(adapter->msix_entries[vector].vector,
1064 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1069 adapter->tx_ring->itr_register = E1000_EITR(vector);
1070 adapter->tx_ring->itr_val = adapter->current_itr;
1073 err = request_irq(adapter->msix_entries[vector].vector,
1074 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1079 adapter->rx_ring->itr_register = E1000_EITR(vector);
1080 adapter->rx_ring->itr_val = adapter->current_itr;
1083 err = request_irq(adapter->msix_entries[vector].vector,
1084 igbvf_msix_other, 0, netdev->name, netdev);
1088 igbvf_configure_msix(adapter);
1091 free_irq(adapter->msix_entries[--vector].vector, netdev);
1093 free_irq(adapter->msix_entries[--vector].vector, netdev);
1099 * igbvf_alloc_queues - Allocate memory for all rings
1100 * @adapter: board private structure to initialize
1102 static int igbvf_alloc_queues(struct igbvf_adapter *adapter)
1104 struct net_device *netdev = adapter->netdev;
1106 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1107 if (!adapter->tx_ring)
1110 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1111 if (!adapter->rx_ring) {
1112 kfree(adapter->tx_ring);
1116 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1122 * igbvf_request_irq - initialize interrupts
1123 * @adapter: board private structure
1125 * Attempts to configure interrupts using the best available
1126 * capabilities of the hardware and kernel.
1128 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1132 /* igbvf supports msi-x only */
1133 if (adapter->msix_entries)
1134 err = igbvf_request_msix(adapter);
1139 dev_err(&adapter->pdev->dev,
1140 "Unable to allocate interrupt, Error: %d\n", err);
1145 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1147 struct net_device *netdev = adapter->netdev;
1150 if (adapter->msix_entries) {
1151 for (vector = 0; vector < 3; vector++)
1152 free_irq(adapter->msix_entries[vector].vector, netdev);
1157 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1158 * @adapter: board private structure
1160 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1162 struct e1000_hw *hw = &adapter->hw;
1166 if (adapter->msix_entries)
1171 * igbvf_irq_enable - Enable default interrupt generation settings
1172 * @adapter: board private structure
1174 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1176 struct e1000_hw *hw = &adapter->hw;
1178 ew32(EIAC, adapter->eims_enable_mask);
1179 ew32(EIAM, adapter->eims_enable_mask);
1180 ew32(EIMS, adapter->eims_enable_mask);
1184 * igbvf_poll - NAPI Rx polling callback
1185 * @napi: struct associated with this polling callback
1186 * @budget: amount of packets driver is allowed to process this poll
1188 static int igbvf_poll(struct napi_struct *napi, int budget)
1190 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1191 struct igbvf_adapter *adapter = rx_ring->adapter;
1192 struct e1000_hw *hw = &adapter->hw;
1195 igbvf_clean_rx_irq(adapter, &work_done, budget);
1197 if (work_done == budget)
1200 /* Exit the polling mode, but don't re-enable interrupts if stack might
1201 * poll us due to busy-polling
1203 if (likely(napi_complete_done(napi, work_done))) {
1204 if (adapter->requested_itr & 3)
1205 igbvf_set_itr(adapter);
1207 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1208 ew32(EIMS, adapter->rx_ring->eims_value);
1215 * igbvf_set_rlpml - set receive large packet maximum length
1216 * @adapter: board private structure
1218 * Configure the maximum size of packets that will be received
1220 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1223 struct e1000_hw *hw = &adapter->hw;
1225 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1227 spin_lock_bh(&hw->mbx_lock);
1229 e1000_rlpml_set_vf(hw, max_frame_size);
1231 spin_unlock_bh(&hw->mbx_lock);
1234 static int igbvf_vlan_rx_add_vid(struct net_device *netdev,
1235 __be16 proto, u16 vid)
1237 struct igbvf_adapter *adapter = netdev_priv(netdev);
1238 struct e1000_hw *hw = &adapter->hw;
1240 spin_lock_bh(&hw->mbx_lock);
1242 if (hw->mac.ops.set_vfta(hw, vid, true)) {
1243 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1244 spin_unlock_bh(&hw->mbx_lock);
1248 spin_unlock_bh(&hw->mbx_lock);
1250 set_bit(vid, adapter->active_vlans);
1254 static int igbvf_vlan_rx_kill_vid(struct net_device *netdev,
1255 __be16 proto, u16 vid)
1257 struct igbvf_adapter *adapter = netdev_priv(netdev);
1258 struct e1000_hw *hw = &adapter->hw;
1260 spin_lock_bh(&hw->mbx_lock);
1262 if (hw->mac.ops.set_vfta(hw, vid, false)) {
1263 dev_err(&adapter->pdev->dev,
1264 "Failed to remove vlan id %d\n", vid);
1265 spin_unlock_bh(&hw->mbx_lock);
1269 spin_unlock_bh(&hw->mbx_lock);
1271 clear_bit(vid, adapter->active_vlans);
1275 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1279 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1280 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1284 * igbvf_configure_tx - Configure Transmit Unit after Reset
1285 * @adapter: board private structure
1287 * Configure the Tx unit of the MAC after a reset.
1289 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1291 struct e1000_hw *hw = &adapter->hw;
1292 struct igbvf_ring *tx_ring = adapter->tx_ring;
1294 u32 txdctl, dca_txctrl;
1296 /* disable transmits */
1297 txdctl = er32(TXDCTL(0));
1298 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1302 /* Setup the HW Tx Head and Tail descriptor pointers */
1303 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1304 tdba = tx_ring->dma;
1305 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1306 ew32(TDBAH(0), (tdba >> 32));
1309 tx_ring->head = E1000_TDH(0);
1310 tx_ring->tail = E1000_TDT(0);
1312 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1313 * MUST be delivered in order or it will completely screw up
1316 dca_txctrl = er32(DCA_TXCTRL(0));
1317 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1318 ew32(DCA_TXCTRL(0), dca_txctrl);
1320 /* enable transmits */
1321 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1322 ew32(TXDCTL(0), txdctl);
1324 /* Setup Transmit Descriptor Settings for eop descriptor */
1325 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1327 /* enable Report Status bit */
1328 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1332 * igbvf_setup_srrctl - configure the receive control registers
1333 * @adapter: Board private structure
1335 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1337 struct e1000_hw *hw = &adapter->hw;
1340 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1341 E1000_SRRCTL_BSIZEHDR_MASK |
1342 E1000_SRRCTL_BSIZEPKT_MASK);
1344 /* Enable queue drop to avoid head of line blocking */
1345 srrctl |= E1000_SRRCTL_DROP_EN;
1347 /* Setup buffer sizes */
1348 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1349 E1000_SRRCTL_BSIZEPKT_SHIFT;
1351 if (adapter->rx_buffer_len < 2048) {
1352 adapter->rx_ps_hdr_size = 0;
1353 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1355 adapter->rx_ps_hdr_size = 128;
1356 srrctl |= adapter->rx_ps_hdr_size <<
1357 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1358 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1361 ew32(SRRCTL(0), srrctl);
1365 * igbvf_configure_rx - Configure Receive Unit after Reset
1366 * @adapter: board private structure
1368 * Configure the Rx unit of the MAC after a reset.
1370 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1372 struct e1000_hw *hw = &adapter->hw;
1373 struct igbvf_ring *rx_ring = adapter->rx_ring;
1377 /* disable receives */
1378 rxdctl = er32(RXDCTL(0));
1379 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1383 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1384 * the Base and Length of the Rx Descriptor Ring
1386 rdba = rx_ring->dma;
1387 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1388 ew32(RDBAH(0), (rdba >> 32));
1389 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1390 rx_ring->head = E1000_RDH(0);
1391 rx_ring->tail = E1000_RDT(0);
1395 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1396 rxdctl &= 0xFFF00000;
1397 rxdctl |= IGBVF_RX_PTHRESH;
1398 rxdctl |= IGBVF_RX_HTHRESH << 8;
1399 rxdctl |= IGBVF_RX_WTHRESH << 16;
1401 igbvf_set_rlpml(adapter);
1403 /* enable receives */
1404 ew32(RXDCTL(0), rxdctl);
1408 * igbvf_set_multi - Multicast and Promiscuous mode set
1409 * @netdev: network interface device structure
1411 * The set_multi entry point is called whenever the multicast address
1412 * list or the network interface flags are updated. This routine is
1413 * responsible for configuring the hardware for proper multicast,
1414 * promiscuous mode, and all-multi behavior.
1416 static void igbvf_set_multi(struct net_device *netdev)
1418 struct igbvf_adapter *adapter = netdev_priv(netdev);
1419 struct e1000_hw *hw = &adapter->hw;
1420 struct netdev_hw_addr *ha;
1421 u8 *mta_list = NULL;
1424 if (!netdev_mc_empty(netdev)) {
1425 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN,
1431 /* prepare a packed array of only addresses. */
1433 netdev_for_each_mc_addr(ha, netdev)
1434 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1436 spin_lock_bh(&hw->mbx_lock);
1438 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1440 spin_unlock_bh(&hw->mbx_lock);
1445 * igbvf_set_uni - Configure unicast MAC filters
1446 * @netdev: network interface device structure
1448 * This routine is responsible for configuring the hardware for proper
1451 static int igbvf_set_uni(struct net_device *netdev)
1453 struct igbvf_adapter *adapter = netdev_priv(netdev);
1454 struct e1000_hw *hw = &adapter->hw;
1456 if (netdev_uc_count(netdev) > IGBVF_MAX_MAC_FILTERS) {
1457 pr_err("Too many unicast filters - No Space\n");
1461 spin_lock_bh(&hw->mbx_lock);
1463 /* Clear all unicast MAC filters */
1464 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_CLR, NULL);
1466 spin_unlock_bh(&hw->mbx_lock);
1468 if (!netdev_uc_empty(netdev)) {
1469 struct netdev_hw_addr *ha;
1471 /* Add MAC filters one by one */
1472 netdev_for_each_uc_addr(ha, netdev) {
1473 spin_lock_bh(&hw->mbx_lock);
1475 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_ADD,
1478 spin_unlock_bh(&hw->mbx_lock);
1486 static void igbvf_set_rx_mode(struct net_device *netdev)
1488 igbvf_set_multi(netdev);
1489 igbvf_set_uni(netdev);
1493 * igbvf_configure - configure the hardware for Rx and Tx
1494 * @adapter: private board structure
1496 static void igbvf_configure(struct igbvf_adapter *adapter)
1498 igbvf_set_rx_mode(adapter->netdev);
1500 igbvf_restore_vlan(adapter);
1502 igbvf_configure_tx(adapter);
1503 igbvf_setup_srrctl(adapter);
1504 igbvf_configure_rx(adapter);
1505 igbvf_alloc_rx_buffers(adapter->rx_ring,
1506 igbvf_desc_unused(adapter->rx_ring));
1509 /* igbvf_reset - bring the hardware into a known good state
1510 * @adapter: private board structure
1512 * This function boots the hardware and enables some settings that
1513 * require a configuration cycle of the hardware - those cannot be
1514 * set/changed during runtime. After reset the device needs to be
1515 * properly configured for Rx, Tx etc.
1517 static void igbvf_reset(struct igbvf_adapter *adapter)
1519 struct e1000_mac_info *mac = &adapter->hw.mac;
1520 struct net_device *netdev = adapter->netdev;
1521 struct e1000_hw *hw = &adapter->hw;
1523 spin_lock_bh(&hw->mbx_lock);
1525 /* Allow time for pending master requests to run */
1526 if (mac->ops.reset_hw(hw))
1527 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1529 mac->ops.init_hw(hw);
1531 spin_unlock_bh(&hw->mbx_lock);
1533 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1534 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1536 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1540 adapter->last_reset = jiffies;
1543 int igbvf_up(struct igbvf_adapter *adapter)
1545 struct e1000_hw *hw = &adapter->hw;
1547 /* hardware has been reset, we need to reload some things */
1548 igbvf_configure(adapter);
1550 clear_bit(__IGBVF_DOWN, &adapter->state);
1552 napi_enable(&adapter->rx_ring->napi);
1553 if (adapter->msix_entries)
1554 igbvf_configure_msix(adapter);
1556 /* Clear any pending interrupts. */
1558 igbvf_irq_enable(adapter);
1560 /* start the watchdog */
1561 hw->mac.get_link_status = 1;
1562 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1567 void igbvf_down(struct igbvf_adapter *adapter)
1569 struct net_device *netdev = adapter->netdev;
1570 struct e1000_hw *hw = &adapter->hw;
1573 /* signal that we're down so the interrupt handler does not
1574 * reschedule our watchdog timer
1576 set_bit(__IGBVF_DOWN, &adapter->state);
1578 /* disable receives in the hardware */
1579 rxdctl = er32(RXDCTL(0));
1580 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1582 netif_carrier_off(netdev);
1583 netif_stop_queue(netdev);
1585 /* disable transmits in the hardware */
1586 txdctl = er32(TXDCTL(0));
1587 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1589 /* flush both disables and wait for them to finish */
1593 napi_disable(&adapter->rx_ring->napi);
1595 igbvf_irq_disable(adapter);
1597 del_timer_sync(&adapter->watchdog_timer);
1599 /* record the stats before reset*/
1600 igbvf_update_stats(adapter);
1602 adapter->link_speed = 0;
1603 adapter->link_duplex = 0;
1605 igbvf_reset(adapter);
1606 igbvf_clean_tx_ring(adapter->tx_ring);
1607 igbvf_clean_rx_ring(adapter->rx_ring);
1610 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1613 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1614 usleep_range(1000, 2000);
1615 igbvf_down(adapter);
1617 clear_bit(__IGBVF_RESETTING, &adapter->state);
1621 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1622 * @adapter: board private structure to initialize
1624 * igbvf_sw_init initializes the Adapter private data structure.
1625 * Fields are initialized based on PCI device information and
1626 * OS network device settings (MTU size).
1628 static int igbvf_sw_init(struct igbvf_adapter *adapter)
1630 struct net_device *netdev = adapter->netdev;
1633 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1634 adapter->rx_ps_hdr_size = 0;
1635 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1636 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1638 adapter->tx_int_delay = 8;
1639 adapter->tx_abs_int_delay = 32;
1640 adapter->rx_int_delay = 0;
1641 adapter->rx_abs_int_delay = 8;
1642 adapter->requested_itr = 3;
1643 adapter->current_itr = IGBVF_START_ITR;
1645 /* Set various function pointers */
1646 adapter->ei->init_ops(&adapter->hw);
1648 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1652 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1656 igbvf_set_interrupt_capability(adapter);
1658 if (igbvf_alloc_queues(adapter))
1661 spin_lock_init(&adapter->tx_queue_lock);
1663 /* Explicitly disable IRQ since the NIC can be in any state. */
1664 igbvf_irq_disable(adapter);
1666 spin_lock_init(&adapter->stats_lock);
1667 spin_lock_init(&adapter->hw.mbx_lock);
1669 set_bit(__IGBVF_DOWN, &adapter->state);
1673 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1675 struct e1000_hw *hw = &adapter->hw;
1677 adapter->stats.last_gprc = er32(VFGPRC);
1678 adapter->stats.last_gorc = er32(VFGORC);
1679 adapter->stats.last_gptc = er32(VFGPTC);
1680 adapter->stats.last_gotc = er32(VFGOTC);
1681 adapter->stats.last_mprc = er32(VFMPRC);
1682 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1683 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1684 adapter->stats.last_gorlbc = er32(VFGORLBC);
1685 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1687 adapter->stats.base_gprc = er32(VFGPRC);
1688 adapter->stats.base_gorc = er32(VFGORC);
1689 adapter->stats.base_gptc = er32(VFGPTC);
1690 adapter->stats.base_gotc = er32(VFGOTC);
1691 adapter->stats.base_mprc = er32(VFMPRC);
1692 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1693 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1694 adapter->stats.base_gorlbc = er32(VFGORLBC);
1695 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1699 * igbvf_open - Called when a network interface is made active
1700 * @netdev: network interface device structure
1702 * Returns 0 on success, negative value on failure
1704 * The open entry point is called when a network interface is made
1705 * active by the system (IFF_UP). At this point all resources needed
1706 * for transmit and receive operations are allocated, the interrupt
1707 * handler is registered with the OS, the watchdog timer is started,
1708 * and the stack is notified that the interface is ready.
1710 static int igbvf_open(struct net_device *netdev)
1712 struct igbvf_adapter *adapter = netdev_priv(netdev);
1713 struct e1000_hw *hw = &adapter->hw;
1716 /* disallow open during test */
1717 if (test_bit(__IGBVF_TESTING, &adapter->state))
1720 /* allocate transmit descriptors */
1721 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1725 /* allocate receive descriptors */
1726 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1730 /* before we allocate an interrupt, we must be ready to handle it.
1731 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1732 * as soon as we call pci_request_irq, so we have to setup our
1733 * clean_rx handler before we do so.
1735 igbvf_configure(adapter);
1737 err = igbvf_request_irq(adapter);
1741 /* From here on the code is the same as igbvf_up() */
1742 clear_bit(__IGBVF_DOWN, &adapter->state);
1744 napi_enable(&adapter->rx_ring->napi);
1746 /* clear any pending interrupts */
1749 igbvf_irq_enable(adapter);
1751 /* start the watchdog */
1752 hw->mac.get_link_status = 1;
1753 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1758 igbvf_free_rx_resources(adapter->rx_ring);
1760 igbvf_free_tx_resources(adapter->tx_ring);
1762 igbvf_reset(adapter);
1768 * igbvf_close - Disables a network interface
1769 * @netdev: network interface device structure
1771 * Returns 0, this is not allowed to fail
1773 * The close entry point is called when an interface is de-activated
1774 * by the OS. The hardware is still under the drivers control, but
1775 * needs to be disabled. A global MAC reset is issued to stop the
1776 * hardware, and all transmit and receive resources are freed.
1778 static int igbvf_close(struct net_device *netdev)
1780 struct igbvf_adapter *adapter = netdev_priv(netdev);
1782 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1783 igbvf_down(adapter);
1785 igbvf_free_irq(adapter);
1787 igbvf_free_tx_resources(adapter->tx_ring);
1788 igbvf_free_rx_resources(adapter->rx_ring);
1794 * igbvf_set_mac - Change the Ethernet Address of the NIC
1795 * @netdev: network interface device structure
1796 * @p: pointer to an address structure
1798 * Returns 0 on success, negative on failure
1800 static int igbvf_set_mac(struct net_device *netdev, void *p)
1802 struct igbvf_adapter *adapter = netdev_priv(netdev);
1803 struct e1000_hw *hw = &adapter->hw;
1804 struct sockaddr *addr = p;
1806 if (!is_valid_ether_addr(addr->sa_data))
1807 return -EADDRNOTAVAIL;
1809 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1811 spin_lock_bh(&hw->mbx_lock);
1813 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1815 spin_unlock_bh(&hw->mbx_lock);
1817 if (!ether_addr_equal(addr->sa_data, hw->mac.addr))
1818 return -EADDRNOTAVAIL;
1820 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1825 #define UPDATE_VF_COUNTER(reg, name) \
1827 u32 current_counter = er32(reg); \
1828 if (current_counter < adapter->stats.last_##name) \
1829 adapter->stats.name += 0x100000000LL; \
1830 adapter->stats.last_##name = current_counter; \
1831 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1832 adapter->stats.name |= current_counter; \
1836 * igbvf_update_stats - Update the board statistics counters
1837 * @adapter: board private structure
1839 void igbvf_update_stats(struct igbvf_adapter *adapter)
1841 struct e1000_hw *hw = &adapter->hw;
1842 struct pci_dev *pdev = adapter->pdev;
1844 /* Prevent stats update while adapter is being reset, link is down
1845 * or if the pci connection is down.
1847 if (adapter->link_speed == 0)
1850 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1853 if (pci_channel_offline(pdev))
1856 UPDATE_VF_COUNTER(VFGPRC, gprc);
1857 UPDATE_VF_COUNTER(VFGORC, gorc);
1858 UPDATE_VF_COUNTER(VFGPTC, gptc);
1859 UPDATE_VF_COUNTER(VFGOTC, gotc);
1860 UPDATE_VF_COUNTER(VFMPRC, mprc);
1861 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1862 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1863 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1864 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1866 /* Fill out the OS statistics structure */
1867 adapter->netdev->stats.multicast = adapter->stats.mprc;
1870 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1872 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1873 adapter->link_speed,
1874 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1877 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1879 struct e1000_hw *hw = &adapter->hw;
1880 s32 ret_val = E1000_SUCCESS;
1883 /* If interface is down, stay link down */
1884 if (test_bit(__IGBVF_DOWN, &adapter->state))
1887 spin_lock_bh(&hw->mbx_lock);
1889 ret_val = hw->mac.ops.check_for_link(hw);
1891 spin_unlock_bh(&hw->mbx_lock);
1893 link_active = !hw->mac.get_link_status;
1895 /* if check for link returns error we will need to reset */
1896 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1897 schedule_work(&adapter->reset_task);
1903 * igbvf_watchdog - Timer Call-back
1904 * @t: timer list pointer containing private struct
1906 static void igbvf_watchdog(struct timer_list *t)
1908 struct igbvf_adapter *adapter = from_timer(adapter, t, watchdog_timer);
1910 /* Do the rest outside of interrupt context */
1911 schedule_work(&adapter->watchdog_task);
1914 static void igbvf_watchdog_task(struct work_struct *work)
1916 struct igbvf_adapter *adapter = container_of(work,
1917 struct igbvf_adapter,
1919 struct net_device *netdev = adapter->netdev;
1920 struct e1000_mac_info *mac = &adapter->hw.mac;
1921 struct igbvf_ring *tx_ring = adapter->tx_ring;
1922 struct e1000_hw *hw = &adapter->hw;
1926 link = igbvf_has_link(adapter);
1929 if (!netif_carrier_ok(netdev)) {
1930 mac->ops.get_link_up_info(&adapter->hw,
1931 &adapter->link_speed,
1932 &adapter->link_duplex);
1933 igbvf_print_link_info(adapter);
1935 netif_carrier_on(netdev);
1936 netif_wake_queue(netdev);
1939 if (netif_carrier_ok(netdev)) {
1940 adapter->link_speed = 0;
1941 adapter->link_duplex = 0;
1942 dev_info(&adapter->pdev->dev, "Link is Down\n");
1943 netif_carrier_off(netdev);
1944 netif_stop_queue(netdev);
1948 if (netif_carrier_ok(netdev)) {
1949 igbvf_update_stats(adapter);
1951 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1954 /* We've lost link, so the controller stops DMA,
1955 * but we've got queued Tx work that's never going
1956 * to get done, so reset controller to flush Tx.
1957 * (Do the reset outside of interrupt context).
1959 adapter->tx_timeout_count++;
1960 schedule_work(&adapter->reset_task);
1964 /* Cause software interrupt to ensure Rx ring is cleaned */
1965 ew32(EICS, adapter->rx_ring->eims_value);
1967 /* Reset the timer */
1968 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1969 mod_timer(&adapter->watchdog_timer,
1970 round_jiffies(jiffies + (2 * HZ)));
1973 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1974 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1975 #define IGBVF_TX_FLAGS_TSO 0x00000004
1976 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1977 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1978 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1980 static void igbvf_tx_ctxtdesc(struct igbvf_ring *tx_ring, u32 vlan_macip_lens,
1981 u32 type_tucmd, u32 mss_l4len_idx)
1983 struct e1000_adv_tx_context_desc *context_desc;
1984 struct igbvf_buffer *buffer_info;
1985 u16 i = tx_ring->next_to_use;
1987 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1988 buffer_info = &tx_ring->buffer_info[i];
1991 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
1993 /* set bits to identify this as an advanced context descriptor */
1994 type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT;
1996 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
1997 context_desc->seqnum_seed = 0;
1998 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
1999 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2001 buffer_info->time_stamp = jiffies;
2002 buffer_info->dma = 0;
2005 static int igbvf_tso(struct igbvf_ring *tx_ring,
2006 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2008 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
2018 u32 paylen, l4_offset;
2021 if (skb->ip_summed != CHECKSUM_PARTIAL)
2024 if (!skb_is_gso(skb))
2027 err = skb_cow_head(skb, 0);
2031 ip.hdr = skb_network_header(skb);
2032 l4.hdr = skb_checksum_start(skb);
2034 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2035 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2037 /* initialize outer IP header fields */
2038 if (ip.v4->version == 4) {
2039 unsigned char *csum_start = skb_checksum_start(skb);
2040 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
2042 /* IP header will have to cancel out any data that
2043 * is not a part of the outer IP header
2045 ip.v4->check = csum_fold(csum_partial(trans_start,
2046 csum_start - trans_start,
2048 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
2052 ip.v6->payload_len = 0;
2055 /* determine offset of inner transport header */
2056 l4_offset = l4.hdr - skb->data;
2058 /* compute length of segmentation header */
2059 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
2061 /* remove payload length from inner checksum */
2062 paylen = skb->len - l4_offset;
2063 csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
2066 mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT;
2067 mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT;
2069 /* VLAN MACLEN IPLEN */
2070 vlan_macip_lens = l4.hdr - ip.hdr;
2071 vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT;
2072 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2074 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
2079 static inline bool igbvf_ipv6_csum_is_sctp(struct sk_buff *skb)
2081 unsigned int offset = 0;
2083 ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
2085 return offset == skb_checksum_start_offset(skb);
2088 static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
2089 u32 tx_flags, __be16 protocol)
2091 u32 vlan_macip_lens = 0;
2094 if (skb->ip_summed != CHECKSUM_PARTIAL) {
2096 if (!(tx_flags & IGBVF_TX_FLAGS_VLAN))
2101 switch (skb->csum_offset) {
2102 case offsetof(struct tcphdr, check):
2103 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2105 case offsetof(struct udphdr, check):
2107 case offsetof(struct sctphdr, checksum):
2108 /* validate that this is actually an SCTP request */
2109 if (((protocol == htons(ETH_P_IP)) &&
2110 (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
2111 ((protocol == htons(ETH_P_IPV6)) &&
2112 igbvf_ipv6_csum_is_sctp(skb))) {
2113 type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
2118 skb_checksum_help(skb);
2122 vlan_macip_lens = skb_checksum_start_offset(skb) -
2123 skb_network_offset(skb);
2125 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
2126 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2128 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
2132 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2134 struct igbvf_adapter *adapter = netdev_priv(netdev);
2136 /* there is enough descriptors then we don't need to worry */
2137 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2140 netif_stop_queue(netdev);
2142 /* Herbert's original patch had:
2143 * smp_mb__after_netif_stop_queue();
2144 * but since that doesn't exist yet, just open code it.
2148 /* We need to check again just in case room has been made available */
2149 if (igbvf_desc_unused(adapter->tx_ring) < size)
2152 netif_wake_queue(netdev);
2154 ++adapter->restart_queue;
2158 #define IGBVF_MAX_TXD_PWR 16
2159 #define IGBVF_MAX_DATA_PER_TXD (1u << IGBVF_MAX_TXD_PWR)
2161 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2162 struct igbvf_ring *tx_ring,
2163 struct sk_buff *skb)
2165 struct igbvf_buffer *buffer_info;
2166 struct pci_dev *pdev = adapter->pdev;
2167 unsigned int len = skb_headlen(skb);
2168 unsigned int count = 0, i;
2171 i = tx_ring->next_to_use;
2173 buffer_info = &tx_ring->buffer_info[i];
2174 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2175 buffer_info->length = len;
2176 /* set time_stamp *before* dma to help avoid a possible race */
2177 buffer_info->time_stamp = jiffies;
2178 buffer_info->mapped_as_page = false;
2179 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2181 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2184 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2185 const skb_frag_t *frag;
2189 if (i == tx_ring->count)
2192 frag = &skb_shinfo(skb)->frags[f];
2193 len = skb_frag_size(frag);
2195 buffer_info = &tx_ring->buffer_info[i];
2196 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2197 buffer_info->length = len;
2198 buffer_info->time_stamp = jiffies;
2199 buffer_info->mapped_as_page = true;
2200 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2202 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2206 tx_ring->buffer_info[i].skb = skb;
2211 dev_err(&pdev->dev, "TX DMA map failed\n");
2213 /* clear timestamp and dma mappings for failed buffer_info mapping */
2214 buffer_info->dma = 0;
2215 buffer_info->time_stamp = 0;
2216 buffer_info->length = 0;
2217 buffer_info->mapped_as_page = false;
2221 /* clear timestamp and dma mappings for remaining portion of packet */
2224 i += tx_ring->count;
2226 buffer_info = &tx_ring->buffer_info[i];
2227 igbvf_put_txbuf(adapter, buffer_info);
2233 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2234 struct igbvf_ring *tx_ring,
2235 int tx_flags, int count,
2236 unsigned int first, u32 paylen,
2239 union e1000_adv_tx_desc *tx_desc = NULL;
2240 struct igbvf_buffer *buffer_info;
2241 u32 olinfo_status = 0, cmd_type_len;
2244 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2245 E1000_ADVTXD_DCMD_DEXT);
2247 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2248 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2250 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2251 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2253 /* insert tcp checksum */
2254 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2256 /* insert ip checksum */
2257 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2258 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2260 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2261 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2264 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2266 i = tx_ring->next_to_use;
2268 buffer_info = &tx_ring->buffer_info[i];
2269 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2270 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2271 tx_desc->read.cmd_type_len =
2272 cpu_to_le32(cmd_type_len | buffer_info->length);
2273 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2275 if (i == tx_ring->count)
2279 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2280 /* Force memory writes to complete before letting h/w
2281 * know there are new descriptors to fetch. (Only
2282 * applicable for weak-ordered memory model archs,
2287 tx_ring->buffer_info[first].next_to_watch = tx_desc;
2288 tx_ring->next_to_use = i;
2289 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2292 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2293 struct net_device *netdev,
2294 struct igbvf_ring *tx_ring)
2296 struct igbvf_adapter *adapter = netdev_priv(netdev);
2297 unsigned int first, tx_flags = 0;
2301 __be16 protocol = vlan_get_protocol(skb);
2303 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2304 dev_kfree_skb_any(skb);
2305 return NETDEV_TX_OK;
2308 if (skb->len <= 0) {
2309 dev_kfree_skb_any(skb);
2310 return NETDEV_TX_OK;
2313 /* need: count + 4 desc gap to keep tail from touching
2314 * + 2 desc gap to keep tail from touching head,
2315 * + 1 desc for skb->data,
2316 * + 1 desc for context descriptor,
2317 * head, otherwise try next time
2319 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2320 /* this is a hard error */
2321 return NETDEV_TX_BUSY;
2324 if (skb_vlan_tag_present(skb)) {
2325 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2326 tx_flags |= (skb_vlan_tag_get(skb) <<
2327 IGBVF_TX_FLAGS_VLAN_SHIFT);
2330 if (protocol == htons(ETH_P_IP))
2331 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2333 first = tx_ring->next_to_use;
2335 tso = igbvf_tso(tx_ring, skb, tx_flags, &hdr_len);
2336 if (unlikely(tso < 0)) {
2337 dev_kfree_skb_any(skb);
2338 return NETDEV_TX_OK;
2342 tx_flags |= IGBVF_TX_FLAGS_TSO;
2343 else if (igbvf_tx_csum(tx_ring, skb, tx_flags, protocol) &&
2344 (skb->ip_summed == CHECKSUM_PARTIAL))
2345 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2347 /* count reflects descriptors mapped, if 0 then mapping error
2348 * has occurred and we need to rewind the descriptor queue
2350 count = igbvf_tx_map_adv(adapter, tx_ring, skb);
2353 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2354 first, skb->len, hdr_len);
2355 /* Make sure there is space in the ring for the next send. */
2356 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2358 dev_kfree_skb_any(skb);
2359 tx_ring->buffer_info[first].time_stamp = 0;
2360 tx_ring->next_to_use = first;
2363 return NETDEV_TX_OK;
2366 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2367 struct net_device *netdev)
2369 struct igbvf_adapter *adapter = netdev_priv(netdev);
2370 struct igbvf_ring *tx_ring;
2372 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2373 dev_kfree_skb_any(skb);
2374 return NETDEV_TX_OK;
2377 tx_ring = &adapter->tx_ring[0];
2379 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2383 * igbvf_tx_timeout - Respond to a Tx Hang
2384 * @netdev: network interface device structure
2385 * @txqueue: queue timing out (unused)
2387 static void igbvf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
2389 struct igbvf_adapter *adapter = netdev_priv(netdev);
2391 /* Do the reset outside of interrupt context */
2392 adapter->tx_timeout_count++;
2393 schedule_work(&adapter->reset_task);
2396 static void igbvf_reset_task(struct work_struct *work)
2398 struct igbvf_adapter *adapter;
2400 adapter = container_of(work, struct igbvf_adapter, reset_task);
2402 igbvf_reinit_locked(adapter);
2406 * igbvf_change_mtu - Change the Maximum Transfer Unit
2407 * @netdev: network interface device structure
2408 * @new_mtu: new value for maximum frame size
2410 * Returns 0 on success, negative on failure
2412 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2414 struct igbvf_adapter *adapter = netdev_priv(netdev);
2415 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2417 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2418 usleep_range(1000, 2000);
2419 /* igbvf_down has a dependency on max_frame_size */
2420 adapter->max_frame_size = max_frame;
2421 if (netif_running(netdev))
2422 igbvf_down(adapter);
2424 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2425 * means we reserve 2 more, this pushes us to allocate from the next
2427 * i.e. RXBUFFER_2048 --> size-4096 slab
2428 * However with the new *_jumbo_rx* routines, jumbo receives will use
2432 if (max_frame <= 1024)
2433 adapter->rx_buffer_len = 1024;
2434 else if (max_frame <= 2048)
2435 adapter->rx_buffer_len = 2048;
2437 #if (PAGE_SIZE / 2) > 16384
2438 adapter->rx_buffer_len = 16384;
2440 adapter->rx_buffer_len = PAGE_SIZE / 2;
2443 /* adjust allocation if LPE protects us, and we aren't using SBP */
2444 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2445 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2446 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2449 netdev_dbg(netdev, "changing MTU from %d to %d\n",
2450 netdev->mtu, new_mtu);
2451 netdev->mtu = new_mtu;
2453 if (netif_running(netdev))
2456 igbvf_reset(adapter);
2458 clear_bit(__IGBVF_RESETTING, &adapter->state);
2463 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2471 static int igbvf_suspend(struct device *dev_d)
2473 struct net_device *netdev = dev_get_drvdata(dev_d);
2474 struct igbvf_adapter *adapter = netdev_priv(netdev);
2476 netif_device_detach(netdev);
2478 if (netif_running(netdev)) {
2479 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2480 igbvf_down(adapter);
2481 igbvf_free_irq(adapter);
2487 static int __maybe_unused igbvf_resume(struct device *dev_d)
2489 struct pci_dev *pdev = to_pci_dev(dev_d);
2490 struct net_device *netdev = pci_get_drvdata(pdev);
2491 struct igbvf_adapter *adapter = netdev_priv(netdev);
2494 pci_set_master(pdev);
2496 if (netif_running(netdev)) {
2497 err = igbvf_request_irq(adapter);
2502 igbvf_reset(adapter);
2504 if (netif_running(netdev))
2507 netif_device_attach(netdev);
2512 static void igbvf_shutdown(struct pci_dev *pdev)
2514 igbvf_suspend(&pdev->dev);
2517 #ifdef CONFIG_NET_POLL_CONTROLLER
2518 /* Polling 'interrupt' - used by things like netconsole to send skbs
2519 * without having to re-enable interrupts. It's not called while
2520 * the interrupt routine is executing.
2522 static void igbvf_netpoll(struct net_device *netdev)
2524 struct igbvf_adapter *adapter = netdev_priv(netdev);
2526 disable_irq(adapter->pdev->irq);
2528 igbvf_clean_tx_irq(adapter->tx_ring);
2530 enable_irq(adapter->pdev->irq);
2535 * igbvf_io_error_detected - called when PCI error is detected
2536 * @pdev: Pointer to PCI device
2537 * @state: The current pci connection state
2539 * This function is called after a PCI bus error affecting
2540 * this device has been detected.
2542 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2543 pci_channel_state_t state)
2545 struct net_device *netdev = pci_get_drvdata(pdev);
2546 struct igbvf_adapter *adapter = netdev_priv(netdev);
2548 netif_device_detach(netdev);
2550 if (state == pci_channel_io_perm_failure)
2551 return PCI_ERS_RESULT_DISCONNECT;
2553 if (netif_running(netdev))
2554 igbvf_down(adapter);
2555 pci_disable_device(pdev);
2557 /* Request a slot slot reset. */
2558 return PCI_ERS_RESULT_NEED_RESET;
2562 * igbvf_io_slot_reset - called after the pci bus has been reset.
2563 * @pdev: Pointer to PCI device
2565 * Restart the card from scratch, as if from a cold-boot. Implementation
2566 * resembles the first-half of the igbvf_resume routine.
2568 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2570 struct net_device *netdev = pci_get_drvdata(pdev);
2571 struct igbvf_adapter *adapter = netdev_priv(netdev);
2573 if (pci_enable_device_mem(pdev)) {
2575 "Cannot re-enable PCI device after reset.\n");
2576 return PCI_ERS_RESULT_DISCONNECT;
2578 pci_set_master(pdev);
2580 igbvf_reset(adapter);
2582 return PCI_ERS_RESULT_RECOVERED;
2586 * igbvf_io_resume - called when traffic can start flowing again.
2587 * @pdev: Pointer to PCI device
2589 * This callback is called when the error recovery driver tells us that
2590 * its OK to resume normal operation. Implementation resembles the
2591 * second-half of the igbvf_resume routine.
2593 static void igbvf_io_resume(struct pci_dev *pdev)
2595 struct net_device *netdev = pci_get_drvdata(pdev);
2596 struct igbvf_adapter *adapter = netdev_priv(netdev);
2598 if (netif_running(netdev)) {
2599 if (igbvf_up(adapter)) {
2601 "can't bring device back up after reset\n");
2606 netif_device_attach(netdev);
2609 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2611 struct e1000_hw *hw = &adapter->hw;
2612 struct net_device *netdev = adapter->netdev;
2613 struct pci_dev *pdev = adapter->pdev;
2615 if (hw->mac.type == e1000_vfadapt_i350)
2616 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2618 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2619 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2622 static int igbvf_set_features(struct net_device *netdev,
2623 netdev_features_t features)
2625 struct igbvf_adapter *adapter = netdev_priv(netdev);
2627 if (features & NETIF_F_RXCSUM)
2628 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2630 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2635 #define IGBVF_MAX_MAC_HDR_LEN 127
2636 #define IGBVF_MAX_NETWORK_HDR_LEN 511
2638 static netdev_features_t
2639 igbvf_features_check(struct sk_buff *skb, struct net_device *dev,
2640 netdev_features_t features)
2642 unsigned int network_hdr_len, mac_hdr_len;
2644 /* Make certain the headers can be described by a context descriptor */
2645 mac_hdr_len = skb_network_header(skb) - skb->data;
2646 if (unlikely(mac_hdr_len > IGBVF_MAX_MAC_HDR_LEN))
2647 return features & ~(NETIF_F_HW_CSUM |
2649 NETIF_F_HW_VLAN_CTAG_TX |
2653 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
2654 if (unlikely(network_hdr_len > IGBVF_MAX_NETWORK_HDR_LEN))
2655 return features & ~(NETIF_F_HW_CSUM |
2660 /* We can only support IPV4 TSO in tunnels if we can mangle the
2661 * inner IP ID field, so strip TSO if MANGLEID is not supported.
2663 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
2664 features &= ~NETIF_F_TSO;
2669 static const struct net_device_ops igbvf_netdev_ops = {
2670 .ndo_open = igbvf_open,
2671 .ndo_stop = igbvf_close,
2672 .ndo_start_xmit = igbvf_xmit_frame,
2673 .ndo_set_rx_mode = igbvf_set_rx_mode,
2674 .ndo_set_mac_address = igbvf_set_mac,
2675 .ndo_change_mtu = igbvf_change_mtu,
2676 .ndo_do_ioctl = igbvf_ioctl,
2677 .ndo_tx_timeout = igbvf_tx_timeout,
2678 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2679 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2680 #ifdef CONFIG_NET_POLL_CONTROLLER
2681 .ndo_poll_controller = igbvf_netpoll,
2683 .ndo_set_features = igbvf_set_features,
2684 .ndo_features_check = igbvf_features_check,
2688 * igbvf_probe - Device Initialization Routine
2689 * @pdev: PCI device information struct
2690 * @ent: entry in igbvf_pci_tbl
2692 * Returns 0 on success, negative on failure
2694 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2695 * The OS initialization, configuring of the adapter private structure,
2696 * and a hardware reset occur.
2698 static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2700 struct net_device *netdev;
2701 struct igbvf_adapter *adapter;
2702 struct e1000_hw *hw;
2703 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2705 static int cards_found;
2706 int err, pci_using_dac;
2708 err = pci_enable_device_mem(pdev);
2713 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2717 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2720 "No usable DMA configuration, aborting\n");
2725 err = pci_request_regions(pdev, igbvf_driver_name);
2729 pci_set_master(pdev);
2732 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2734 goto err_alloc_etherdev;
2736 SET_NETDEV_DEV(netdev, &pdev->dev);
2738 pci_set_drvdata(pdev, netdev);
2739 adapter = netdev_priv(netdev);
2741 adapter->netdev = netdev;
2742 adapter->pdev = pdev;
2744 adapter->pba = ei->pba;
2745 adapter->flags = ei->flags;
2746 adapter->hw.back = adapter;
2747 adapter->hw.mac.type = ei->mac;
2748 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2750 /* PCI config space info */
2752 hw->vendor_id = pdev->vendor;
2753 hw->device_id = pdev->device;
2754 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2755 hw->subsystem_device_id = pdev->subsystem_device;
2756 hw->revision_id = pdev->revision;
2759 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2760 pci_resource_len(pdev, 0));
2762 if (!adapter->hw.hw_addr)
2765 if (ei->get_variants) {
2766 err = ei->get_variants(adapter);
2768 goto err_get_variants;
2771 /* setup adapter struct */
2772 err = igbvf_sw_init(adapter);
2776 /* construct the net_device struct */
2777 netdev->netdev_ops = &igbvf_netdev_ops;
2779 igbvf_set_ethtool_ops(netdev);
2780 netdev->watchdog_timeo = 5 * HZ;
2781 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2783 adapter->bd_number = cards_found++;
2785 netdev->hw_features = NETIF_F_SG |
2792 #define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
2793 NETIF_F_GSO_GRE_CSUM | \
2794 NETIF_F_GSO_IPXIP4 | \
2795 NETIF_F_GSO_IPXIP6 | \
2796 NETIF_F_GSO_UDP_TUNNEL | \
2797 NETIF_F_GSO_UDP_TUNNEL_CSUM)
2799 netdev->gso_partial_features = IGBVF_GSO_PARTIAL_FEATURES;
2800 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
2801 IGBVF_GSO_PARTIAL_FEATURES;
2803 netdev->features = netdev->hw_features;
2806 netdev->features |= NETIF_F_HIGHDMA;
2808 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
2809 netdev->mpls_features |= NETIF_F_HW_CSUM;
2810 netdev->hw_enc_features |= netdev->vlan_features;
2812 /* set this bit last since it cannot be part of vlan_features */
2813 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
2814 NETIF_F_HW_VLAN_CTAG_RX |
2815 NETIF_F_HW_VLAN_CTAG_TX;
2817 /* MTU range: 68 - 9216 */
2818 netdev->min_mtu = ETH_MIN_MTU;
2819 netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
2821 spin_lock_bh(&hw->mbx_lock);
2823 /*reset the controller to put the device in a known good state */
2824 err = hw->mac.ops.reset_hw(hw);
2826 dev_info(&pdev->dev,
2827 "PF still in reset state. Is the PF interface up?\n");
2829 err = hw->mac.ops.read_mac_addr(hw);
2831 dev_info(&pdev->dev, "Error reading MAC address.\n");
2832 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2833 dev_info(&pdev->dev,
2834 "MAC address not assigned by administrator.\n");
2835 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2839 spin_unlock_bh(&hw->mbx_lock);
2841 if (!is_valid_ether_addr(netdev->dev_addr)) {
2842 dev_info(&pdev->dev, "Assigning random MAC address.\n");
2843 eth_hw_addr_random(netdev);
2844 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2848 timer_setup(&adapter->watchdog_timer, igbvf_watchdog, 0);
2850 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2851 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2853 /* ring size defaults */
2854 adapter->rx_ring->count = 1024;
2855 adapter->tx_ring->count = 1024;
2857 /* reset the hardware with the new settings */
2858 igbvf_reset(adapter);
2860 /* set hardware-specific flags */
2861 if (adapter->hw.mac.type == e1000_vfadapt_i350)
2862 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP;
2864 strcpy(netdev->name, "eth%d");
2865 err = register_netdev(netdev);
2869 /* tell the stack to leave us alone until igbvf_open() is called */
2870 netif_carrier_off(netdev);
2871 netif_stop_queue(netdev);
2873 igbvf_print_device_info(adapter);
2875 igbvf_initialize_last_counter_stats(adapter);
2880 netif_napi_del(&adapter->rx_ring->napi);
2881 kfree(adapter->tx_ring);
2882 kfree(adapter->rx_ring);
2884 igbvf_reset_interrupt_capability(adapter);
2886 iounmap(adapter->hw.hw_addr);
2888 free_netdev(netdev);
2890 pci_release_regions(pdev);
2893 pci_disable_device(pdev);
2898 * igbvf_remove - Device Removal Routine
2899 * @pdev: PCI device information struct
2901 * igbvf_remove is called by the PCI subsystem to alert the driver
2902 * that it should release a PCI device. The could be caused by a
2903 * Hot-Plug event, or because the driver is going to be removed from
2906 static void igbvf_remove(struct pci_dev *pdev)
2908 struct net_device *netdev = pci_get_drvdata(pdev);
2909 struct igbvf_adapter *adapter = netdev_priv(netdev);
2910 struct e1000_hw *hw = &adapter->hw;
2912 /* The watchdog timer may be rescheduled, so explicitly
2913 * disable it from being rescheduled.
2915 set_bit(__IGBVF_DOWN, &adapter->state);
2916 del_timer_sync(&adapter->watchdog_timer);
2918 cancel_work_sync(&adapter->reset_task);
2919 cancel_work_sync(&adapter->watchdog_task);
2921 unregister_netdev(netdev);
2923 igbvf_reset_interrupt_capability(adapter);
2925 /* it is important to delete the NAPI struct prior to freeing the
2926 * Rx ring so that you do not end up with null pointer refs
2928 netif_napi_del(&adapter->rx_ring->napi);
2929 kfree(adapter->tx_ring);
2930 kfree(adapter->rx_ring);
2932 iounmap(hw->hw_addr);
2933 if (hw->flash_address)
2934 iounmap(hw->flash_address);
2935 pci_release_regions(pdev);
2937 free_netdev(netdev);
2939 pci_disable_device(pdev);
2942 /* PCI Error Recovery (ERS) */
2943 static const struct pci_error_handlers igbvf_err_handler = {
2944 .error_detected = igbvf_io_error_detected,
2945 .slot_reset = igbvf_io_slot_reset,
2946 .resume = igbvf_io_resume,
2949 static const struct pci_device_id igbvf_pci_tbl[] = {
2950 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2951 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2952 { } /* terminate list */
2954 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2956 static SIMPLE_DEV_PM_OPS(igbvf_pm_ops, igbvf_suspend, igbvf_resume);
2958 /* PCI Device API Driver */
2959 static struct pci_driver igbvf_driver = {
2960 .name = igbvf_driver_name,
2961 .id_table = igbvf_pci_tbl,
2962 .probe = igbvf_probe,
2963 .remove = igbvf_remove,
2964 .driver.pm = &igbvf_pm_ops,
2965 .shutdown = igbvf_shutdown,
2966 .err_handler = &igbvf_err_handler
2970 * igbvf_init_module - Driver Registration Routine
2972 * igbvf_init_module is the first routine called when the driver is
2973 * loaded. All it does is register with the PCI subsystem.
2975 static int __init igbvf_init_module(void)
2979 pr_info("%s\n", igbvf_driver_string);
2980 pr_info("%s\n", igbvf_copyright);
2982 ret = pci_register_driver(&igbvf_driver);
2986 module_init(igbvf_init_module);
2989 * igbvf_exit_module - Driver Exit Cleanup Routine
2991 * igbvf_exit_module is called just before the driver is removed
2994 static void __exit igbvf_exit_module(void)
2996 pci_unregister_driver(&igbvf_driver);
2998 module_exit(igbvf_exit_module);
3000 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
3001 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
3002 MODULE_LICENSE("GPL v2");