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);
1095 * igbvf_alloc_queues - Allocate memory for all rings
1096 * @adapter: board private structure to initialize
1098 static int igbvf_alloc_queues(struct igbvf_adapter *adapter)
1100 struct net_device *netdev = adapter->netdev;
1102 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1103 if (!adapter->tx_ring)
1106 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1107 if (!adapter->rx_ring) {
1108 kfree(adapter->tx_ring);
1112 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1118 * igbvf_request_irq - initialize interrupts
1119 * @adapter: board private structure
1121 * Attempts to configure interrupts using the best available
1122 * capabilities of the hardware and kernel.
1124 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1128 /* igbvf supports msi-x only */
1129 if (adapter->msix_entries)
1130 err = igbvf_request_msix(adapter);
1135 dev_err(&adapter->pdev->dev,
1136 "Unable to allocate interrupt, Error: %d\n", err);
1141 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1143 struct net_device *netdev = adapter->netdev;
1146 if (adapter->msix_entries) {
1147 for (vector = 0; vector < 3; vector++)
1148 free_irq(adapter->msix_entries[vector].vector, netdev);
1153 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1154 * @adapter: board private structure
1156 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1158 struct e1000_hw *hw = &adapter->hw;
1162 if (adapter->msix_entries)
1167 * igbvf_irq_enable - Enable default interrupt generation settings
1168 * @adapter: board private structure
1170 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1172 struct e1000_hw *hw = &adapter->hw;
1174 ew32(EIAC, adapter->eims_enable_mask);
1175 ew32(EIAM, adapter->eims_enable_mask);
1176 ew32(EIMS, adapter->eims_enable_mask);
1180 * igbvf_poll - NAPI Rx polling callback
1181 * @napi: struct associated with this polling callback
1182 * @budget: amount of packets driver is allowed to process this poll
1184 static int igbvf_poll(struct napi_struct *napi, int budget)
1186 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1187 struct igbvf_adapter *adapter = rx_ring->adapter;
1188 struct e1000_hw *hw = &adapter->hw;
1191 igbvf_clean_rx_irq(adapter, &work_done, budget);
1193 if (work_done == budget)
1196 /* Exit the polling mode, but don't re-enable interrupts if stack might
1197 * poll us due to busy-polling
1199 if (likely(napi_complete_done(napi, work_done))) {
1200 if (adapter->requested_itr & 3)
1201 igbvf_set_itr(adapter);
1203 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1204 ew32(EIMS, adapter->rx_ring->eims_value);
1211 * igbvf_set_rlpml - set receive large packet maximum length
1212 * @adapter: board private structure
1214 * Configure the maximum size of packets that will be received
1216 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1219 struct e1000_hw *hw = &adapter->hw;
1221 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1223 spin_lock_bh(&hw->mbx_lock);
1225 e1000_rlpml_set_vf(hw, max_frame_size);
1227 spin_unlock_bh(&hw->mbx_lock);
1230 static int igbvf_vlan_rx_add_vid(struct net_device *netdev,
1231 __be16 proto, u16 vid)
1233 struct igbvf_adapter *adapter = netdev_priv(netdev);
1234 struct e1000_hw *hw = &adapter->hw;
1236 spin_lock_bh(&hw->mbx_lock);
1238 if (hw->mac.ops.set_vfta(hw, vid, true)) {
1239 dev_warn(&adapter->pdev->dev, "Vlan id %d\n is not added", vid);
1240 spin_unlock_bh(&hw->mbx_lock);
1244 spin_unlock_bh(&hw->mbx_lock);
1246 set_bit(vid, adapter->active_vlans);
1250 static int igbvf_vlan_rx_kill_vid(struct net_device *netdev,
1251 __be16 proto, u16 vid)
1253 struct igbvf_adapter *adapter = netdev_priv(netdev);
1254 struct e1000_hw *hw = &adapter->hw;
1256 spin_lock_bh(&hw->mbx_lock);
1258 if (hw->mac.ops.set_vfta(hw, vid, false)) {
1259 dev_err(&adapter->pdev->dev,
1260 "Failed to remove vlan id %d\n", vid);
1261 spin_unlock_bh(&hw->mbx_lock);
1265 spin_unlock_bh(&hw->mbx_lock);
1267 clear_bit(vid, adapter->active_vlans);
1271 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1275 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1276 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1280 * igbvf_configure_tx - Configure Transmit Unit after Reset
1281 * @adapter: board private structure
1283 * Configure the Tx unit of the MAC after a reset.
1285 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1287 struct e1000_hw *hw = &adapter->hw;
1288 struct igbvf_ring *tx_ring = adapter->tx_ring;
1290 u32 txdctl, dca_txctrl;
1292 /* disable transmits */
1293 txdctl = er32(TXDCTL(0));
1294 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1298 /* Setup the HW Tx Head and Tail descriptor pointers */
1299 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1300 tdba = tx_ring->dma;
1301 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1302 ew32(TDBAH(0), (tdba >> 32));
1305 tx_ring->head = E1000_TDH(0);
1306 tx_ring->tail = E1000_TDT(0);
1308 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1309 * MUST be delivered in order or it will completely screw up
1312 dca_txctrl = er32(DCA_TXCTRL(0));
1313 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1314 ew32(DCA_TXCTRL(0), dca_txctrl);
1316 /* enable transmits */
1317 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1318 ew32(TXDCTL(0), txdctl);
1320 /* Setup Transmit Descriptor Settings for eop descriptor */
1321 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1323 /* enable Report Status bit */
1324 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1328 * igbvf_setup_srrctl - configure the receive control registers
1329 * @adapter: Board private structure
1331 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1333 struct e1000_hw *hw = &adapter->hw;
1336 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1337 E1000_SRRCTL_BSIZEHDR_MASK |
1338 E1000_SRRCTL_BSIZEPKT_MASK);
1340 /* Enable queue drop to avoid head of line blocking */
1341 srrctl |= E1000_SRRCTL_DROP_EN;
1343 /* Setup buffer sizes */
1344 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1345 E1000_SRRCTL_BSIZEPKT_SHIFT;
1347 if (adapter->rx_buffer_len < 2048) {
1348 adapter->rx_ps_hdr_size = 0;
1349 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1351 adapter->rx_ps_hdr_size = 128;
1352 srrctl |= adapter->rx_ps_hdr_size <<
1353 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1354 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1357 ew32(SRRCTL(0), srrctl);
1361 * igbvf_configure_rx - Configure Receive Unit after Reset
1362 * @adapter: board private structure
1364 * Configure the Rx unit of the MAC after a reset.
1366 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1368 struct e1000_hw *hw = &adapter->hw;
1369 struct igbvf_ring *rx_ring = adapter->rx_ring;
1373 /* disable receives */
1374 rxdctl = er32(RXDCTL(0));
1375 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1379 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1380 * the Base and Length of the Rx Descriptor Ring
1382 rdba = rx_ring->dma;
1383 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1384 ew32(RDBAH(0), (rdba >> 32));
1385 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1386 rx_ring->head = E1000_RDH(0);
1387 rx_ring->tail = E1000_RDT(0);
1391 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1392 rxdctl &= 0xFFF00000;
1393 rxdctl |= IGBVF_RX_PTHRESH;
1394 rxdctl |= IGBVF_RX_HTHRESH << 8;
1395 rxdctl |= IGBVF_RX_WTHRESH << 16;
1397 igbvf_set_rlpml(adapter);
1399 /* enable receives */
1400 ew32(RXDCTL(0), rxdctl);
1404 * igbvf_set_multi - Multicast and Promiscuous mode set
1405 * @netdev: network interface device structure
1407 * The set_multi entry point is called whenever the multicast address
1408 * list or the network interface flags are updated. This routine is
1409 * responsible for configuring the hardware for proper multicast,
1410 * promiscuous mode, and all-multi behavior.
1412 static void igbvf_set_multi(struct net_device *netdev)
1414 struct igbvf_adapter *adapter = netdev_priv(netdev);
1415 struct e1000_hw *hw = &adapter->hw;
1416 struct netdev_hw_addr *ha;
1417 u8 *mta_list = NULL;
1420 if (!netdev_mc_empty(netdev)) {
1421 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN,
1427 /* prepare a packed array of only addresses. */
1429 netdev_for_each_mc_addr(ha, netdev)
1430 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1432 spin_lock_bh(&hw->mbx_lock);
1434 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1436 spin_unlock_bh(&hw->mbx_lock);
1441 * igbvf_set_uni - Configure unicast MAC filters
1442 * @netdev: network interface device structure
1444 * This routine is responsible for configuring the hardware for proper
1447 static int igbvf_set_uni(struct net_device *netdev)
1449 struct igbvf_adapter *adapter = netdev_priv(netdev);
1450 struct e1000_hw *hw = &adapter->hw;
1452 if (netdev_uc_count(netdev) > IGBVF_MAX_MAC_FILTERS) {
1453 pr_err("Too many unicast filters - No Space\n");
1457 spin_lock_bh(&hw->mbx_lock);
1459 /* Clear all unicast MAC filters */
1460 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_CLR, NULL);
1462 spin_unlock_bh(&hw->mbx_lock);
1464 if (!netdev_uc_empty(netdev)) {
1465 struct netdev_hw_addr *ha;
1467 /* Add MAC filters one by one */
1468 netdev_for_each_uc_addr(ha, netdev) {
1469 spin_lock_bh(&hw->mbx_lock);
1471 hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_ADD,
1474 spin_unlock_bh(&hw->mbx_lock);
1482 static void igbvf_set_rx_mode(struct net_device *netdev)
1484 igbvf_set_multi(netdev);
1485 igbvf_set_uni(netdev);
1489 * igbvf_configure - configure the hardware for Rx and Tx
1490 * @adapter: private board structure
1492 static void igbvf_configure(struct igbvf_adapter *adapter)
1494 igbvf_set_rx_mode(adapter->netdev);
1496 igbvf_restore_vlan(adapter);
1498 igbvf_configure_tx(adapter);
1499 igbvf_setup_srrctl(adapter);
1500 igbvf_configure_rx(adapter);
1501 igbvf_alloc_rx_buffers(adapter->rx_ring,
1502 igbvf_desc_unused(adapter->rx_ring));
1505 /* igbvf_reset - bring the hardware into a known good state
1506 * @adapter: private board structure
1508 * This function boots the hardware and enables some settings that
1509 * require a configuration cycle of the hardware - those cannot be
1510 * set/changed during runtime. After reset the device needs to be
1511 * properly configured for Rx, Tx etc.
1513 static void igbvf_reset(struct igbvf_adapter *adapter)
1515 struct e1000_mac_info *mac = &adapter->hw.mac;
1516 struct net_device *netdev = adapter->netdev;
1517 struct e1000_hw *hw = &adapter->hw;
1519 spin_lock_bh(&hw->mbx_lock);
1521 /* Allow time for pending master requests to run */
1522 if (mac->ops.reset_hw(hw))
1523 dev_warn(&adapter->pdev->dev, "PF still resetting\n");
1525 mac->ops.init_hw(hw);
1527 spin_unlock_bh(&hw->mbx_lock);
1529 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1530 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1532 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1536 adapter->last_reset = jiffies;
1539 int igbvf_up(struct igbvf_adapter *adapter)
1541 struct e1000_hw *hw = &adapter->hw;
1543 /* hardware has been reset, we need to reload some things */
1544 igbvf_configure(adapter);
1546 clear_bit(__IGBVF_DOWN, &adapter->state);
1548 napi_enable(&adapter->rx_ring->napi);
1549 if (adapter->msix_entries)
1550 igbvf_configure_msix(adapter);
1552 /* Clear any pending interrupts. */
1554 igbvf_irq_enable(adapter);
1556 /* start the watchdog */
1557 hw->mac.get_link_status = 1;
1558 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1563 void igbvf_down(struct igbvf_adapter *adapter)
1565 struct net_device *netdev = adapter->netdev;
1566 struct e1000_hw *hw = &adapter->hw;
1569 /* signal that we're down so the interrupt handler does not
1570 * reschedule our watchdog timer
1572 set_bit(__IGBVF_DOWN, &adapter->state);
1574 /* disable receives in the hardware */
1575 rxdctl = er32(RXDCTL(0));
1576 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1578 netif_carrier_off(netdev);
1579 netif_stop_queue(netdev);
1581 /* disable transmits in the hardware */
1582 txdctl = er32(TXDCTL(0));
1583 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1585 /* flush both disables and wait for them to finish */
1589 napi_disable(&adapter->rx_ring->napi);
1591 igbvf_irq_disable(adapter);
1593 del_timer_sync(&adapter->watchdog_timer);
1595 /* record the stats before reset*/
1596 igbvf_update_stats(adapter);
1598 adapter->link_speed = 0;
1599 adapter->link_duplex = 0;
1601 igbvf_reset(adapter);
1602 igbvf_clean_tx_ring(adapter->tx_ring);
1603 igbvf_clean_rx_ring(adapter->rx_ring);
1606 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1609 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1610 usleep_range(1000, 2000);
1611 igbvf_down(adapter);
1613 clear_bit(__IGBVF_RESETTING, &adapter->state);
1617 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1618 * @adapter: board private structure to initialize
1620 * igbvf_sw_init initializes the Adapter private data structure.
1621 * Fields are initialized based on PCI device information and
1622 * OS network device settings (MTU size).
1624 static int igbvf_sw_init(struct igbvf_adapter *adapter)
1626 struct net_device *netdev = adapter->netdev;
1629 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1630 adapter->rx_ps_hdr_size = 0;
1631 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1632 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1634 adapter->tx_int_delay = 8;
1635 adapter->tx_abs_int_delay = 32;
1636 adapter->rx_int_delay = 0;
1637 adapter->rx_abs_int_delay = 8;
1638 adapter->requested_itr = 3;
1639 adapter->current_itr = IGBVF_START_ITR;
1641 /* Set various function pointers */
1642 adapter->ei->init_ops(&adapter->hw);
1644 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1648 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1652 igbvf_set_interrupt_capability(adapter);
1654 if (igbvf_alloc_queues(adapter))
1657 spin_lock_init(&adapter->tx_queue_lock);
1659 /* Explicitly disable IRQ since the NIC can be in any state. */
1660 igbvf_irq_disable(adapter);
1662 spin_lock_init(&adapter->stats_lock);
1663 spin_lock_init(&adapter->hw.mbx_lock);
1665 set_bit(__IGBVF_DOWN, &adapter->state);
1669 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1671 struct e1000_hw *hw = &adapter->hw;
1673 adapter->stats.last_gprc = er32(VFGPRC);
1674 adapter->stats.last_gorc = er32(VFGORC);
1675 adapter->stats.last_gptc = er32(VFGPTC);
1676 adapter->stats.last_gotc = er32(VFGOTC);
1677 adapter->stats.last_mprc = er32(VFMPRC);
1678 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1679 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1680 adapter->stats.last_gorlbc = er32(VFGORLBC);
1681 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1683 adapter->stats.base_gprc = er32(VFGPRC);
1684 adapter->stats.base_gorc = er32(VFGORC);
1685 adapter->stats.base_gptc = er32(VFGPTC);
1686 adapter->stats.base_gotc = er32(VFGOTC);
1687 adapter->stats.base_mprc = er32(VFMPRC);
1688 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1689 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1690 adapter->stats.base_gorlbc = er32(VFGORLBC);
1691 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1695 * igbvf_open - Called when a network interface is made active
1696 * @netdev: network interface device structure
1698 * Returns 0 on success, negative value on failure
1700 * The open entry point is called when a network interface is made
1701 * active by the system (IFF_UP). At this point all resources needed
1702 * for transmit and receive operations are allocated, the interrupt
1703 * handler is registered with the OS, the watchdog timer is started,
1704 * and the stack is notified that the interface is ready.
1706 static int igbvf_open(struct net_device *netdev)
1708 struct igbvf_adapter *adapter = netdev_priv(netdev);
1709 struct e1000_hw *hw = &adapter->hw;
1712 /* disallow open during test */
1713 if (test_bit(__IGBVF_TESTING, &adapter->state))
1716 /* allocate transmit descriptors */
1717 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1721 /* allocate receive descriptors */
1722 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1726 /* before we allocate an interrupt, we must be ready to handle it.
1727 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1728 * as soon as we call pci_request_irq, so we have to setup our
1729 * clean_rx handler before we do so.
1731 igbvf_configure(adapter);
1733 err = igbvf_request_irq(adapter);
1737 /* From here on the code is the same as igbvf_up() */
1738 clear_bit(__IGBVF_DOWN, &adapter->state);
1740 napi_enable(&adapter->rx_ring->napi);
1742 /* clear any pending interrupts */
1745 igbvf_irq_enable(adapter);
1747 /* start the watchdog */
1748 hw->mac.get_link_status = 1;
1749 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1754 igbvf_free_rx_resources(adapter->rx_ring);
1756 igbvf_free_tx_resources(adapter->tx_ring);
1758 igbvf_reset(adapter);
1764 * igbvf_close - Disables a network interface
1765 * @netdev: network interface device structure
1767 * Returns 0, this is not allowed to fail
1769 * The close entry point is called when an interface is de-activated
1770 * by the OS. The hardware is still under the drivers control, but
1771 * needs to be disabled. A global MAC reset is issued to stop the
1772 * hardware, and all transmit and receive resources are freed.
1774 static int igbvf_close(struct net_device *netdev)
1776 struct igbvf_adapter *adapter = netdev_priv(netdev);
1778 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1779 igbvf_down(adapter);
1781 igbvf_free_irq(adapter);
1783 igbvf_free_tx_resources(adapter->tx_ring);
1784 igbvf_free_rx_resources(adapter->rx_ring);
1790 * igbvf_set_mac - Change the Ethernet Address of the NIC
1791 * @netdev: network interface device structure
1792 * @p: pointer to an address structure
1794 * Returns 0 on success, negative on failure
1796 static int igbvf_set_mac(struct net_device *netdev, void *p)
1798 struct igbvf_adapter *adapter = netdev_priv(netdev);
1799 struct e1000_hw *hw = &adapter->hw;
1800 struct sockaddr *addr = p;
1802 if (!is_valid_ether_addr(addr->sa_data))
1803 return -EADDRNOTAVAIL;
1805 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1807 spin_lock_bh(&hw->mbx_lock);
1809 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1811 spin_unlock_bh(&hw->mbx_lock);
1813 if (!ether_addr_equal(addr->sa_data, hw->mac.addr))
1814 return -EADDRNOTAVAIL;
1816 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1821 #define UPDATE_VF_COUNTER(reg, name) \
1823 u32 current_counter = er32(reg); \
1824 if (current_counter < adapter->stats.last_##name) \
1825 adapter->stats.name += 0x100000000LL; \
1826 adapter->stats.last_##name = current_counter; \
1827 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1828 adapter->stats.name |= current_counter; \
1832 * igbvf_update_stats - Update the board statistics counters
1833 * @adapter: board private structure
1835 void igbvf_update_stats(struct igbvf_adapter *adapter)
1837 struct e1000_hw *hw = &adapter->hw;
1838 struct pci_dev *pdev = adapter->pdev;
1840 /* Prevent stats update while adapter is being reset, link is down
1841 * or if the pci connection is down.
1843 if (adapter->link_speed == 0)
1846 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1849 if (pci_channel_offline(pdev))
1852 UPDATE_VF_COUNTER(VFGPRC, gprc);
1853 UPDATE_VF_COUNTER(VFGORC, gorc);
1854 UPDATE_VF_COUNTER(VFGPTC, gptc);
1855 UPDATE_VF_COUNTER(VFGOTC, gotc);
1856 UPDATE_VF_COUNTER(VFMPRC, mprc);
1857 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1858 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1859 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1860 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1862 /* Fill out the OS statistics structure */
1863 adapter->netdev->stats.multicast = adapter->stats.mprc;
1866 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1868 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1869 adapter->link_speed,
1870 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1873 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1875 struct e1000_hw *hw = &adapter->hw;
1876 s32 ret_val = E1000_SUCCESS;
1879 /* If interface is down, stay link down */
1880 if (test_bit(__IGBVF_DOWN, &adapter->state))
1883 spin_lock_bh(&hw->mbx_lock);
1885 ret_val = hw->mac.ops.check_for_link(hw);
1887 spin_unlock_bh(&hw->mbx_lock);
1889 link_active = !hw->mac.get_link_status;
1891 /* if check for link returns error we will need to reset */
1892 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1893 schedule_work(&adapter->reset_task);
1899 * igbvf_watchdog - Timer Call-back
1900 * @t: timer list pointer containing private struct
1902 static void igbvf_watchdog(struct timer_list *t)
1904 struct igbvf_adapter *adapter = from_timer(adapter, t, watchdog_timer);
1906 /* Do the rest outside of interrupt context */
1907 schedule_work(&adapter->watchdog_task);
1910 static void igbvf_watchdog_task(struct work_struct *work)
1912 struct igbvf_adapter *adapter = container_of(work,
1913 struct igbvf_adapter,
1915 struct net_device *netdev = adapter->netdev;
1916 struct e1000_mac_info *mac = &adapter->hw.mac;
1917 struct igbvf_ring *tx_ring = adapter->tx_ring;
1918 struct e1000_hw *hw = &adapter->hw;
1922 link = igbvf_has_link(adapter);
1925 if (!netif_carrier_ok(netdev)) {
1926 mac->ops.get_link_up_info(&adapter->hw,
1927 &adapter->link_speed,
1928 &adapter->link_duplex);
1929 igbvf_print_link_info(adapter);
1931 netif_carrier_on(netdev);
1932 netif_wake_queue(netdev);
1935 if (netif_carrier_ok(netdev)) {
1936 adapter->link_speed = 0;
1937 adapter->link_duplex = 0;
1938 dev_info(&adapter->pdev->dev, "Link is Down\n");
1939 netif_carrier_off(netdev);
1940 netif_stop_queue(netdev);
1944 if (netif_carrier_ok(netdev)) {
1945 igbvf_update_stats(adapter);
1947 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1950 /* We've lost link, so the controller stops DMA,
1951 * but we've got queued Tx work that's never going
1952 * to get done, so reset controller to flush Tx.
1953 * (Do the reset outside of interrupt context).
1955 adapter->tx_timeout_count++;
1956 schedule_work(&adapter->reset_task);
1960 /* Cause software interrupt to ensure Rx ring is cleaned */
1961 ew32(EICS, adapter->rx_ring->eims_value);
1963 /* Reset the timer */
1964 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1965 mod_timer(&adapter->watchdog_timer,
1966 round_jiffies(jiffies + (2 * HZ)));
1969 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1970 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1971 #define IGBVF_TX_FLAGS_TSO 0x00000004
1972 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1973 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1974 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1976 static void igbvf_tx_ctxtdesc(struct igbvf_ring *tx_ring, u32 vlan_macip_lens,
1977 u32 type_tucmd, u32 mss_l4len_idx)
1979 struct e1000_adv_tx_context_desc *context_desc;
1980 struct igbvf_buffer *buffer_info;
1981 u16 i = tx_ring->next_to_use;
1983 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1984 buffer_info = &tx_ring->buffer_info[i];
1987 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
1989 /* set bits to identify this as an advanced context descriptor */
1990 type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT;
1992 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
1993 context_desc->seqnum_seed = 0;
1994 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
1995 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1997 buffer_info->time_stamp = jiffies;
1998 buffer_info->dma = 0;
2001 static int igbvf_tso(struct igbvf_ring *tx_ring,
2002 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2004 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
2014 u32 paylen, l4_offset;
2017 if (skb->ip_summed != CHECKSUM_PARTIAL)
2020 if (!skb_is_gso(skb))
2023 err = skb_cow_head(skb, 0);
2027 ip.hdr = skb_network_header(skb);
2028 l4.hdr = skb_checksum_start(skb);
2030 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2031 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2033 /* initialize outer IP header fields */
2034 if (ip.v4->version == 4) {
2035 unsigned char *csum_start = skb_checksum_start(skb);
2036 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
2038 /* IP header will have to cancel out any data that
2039 * is not a part of the outer IP header
2041 ip.v4->check = csum_fold(csum_partial(trans_start,
2042 csum_start - trans_start,
2044 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
2048 ip.v6->payload_len = 0;
2051 /* determine offset of inner transport header */
2052 l4_offset = l4.hdr - skb->data;
2054 /* compute length of segmentation header */
2055 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
2057 /* remove payload length from inner checksum */
2058 paylen = skb->len - l4_offset;
2059 csum_replace_by_diff(&l4.tcp->check, (__force __wsum)htonl(paylen));
2062 mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT;
2063 mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT;
2065 /* VLAN MACLEN IPLEN */
2066 vlan_macip_lens = l4.hdr - ip.hdr;
2067 vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT;
2068 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2070 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
2075 static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
2076 u32 tx_flags, __be16 protocol)
2078 u32 vlan_macip_lens = 0;
2081 if (skb->ip_summed != CHECKSUM_PARTIAL) {
2083 if (!(tx_flags & IGBVF_TX_FLAGS_VLAN))
2088 switch (skb->csum_offset) {
2089 case offsetof(struct tcphdr, check):
2090 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2092 case offsetof(struct udphdr, check):
2094 case offsetof(struct sctphdr, checksum):
2095 /* validate that this is actually an SCTP request */
2096 if (skb_csum_is_sctp(skb)) {
2097 type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
2102 skb_checksum_help(skb);
2106 vlan_macip_lens = skb_checksum_start_offset(skb) -
2107 skb_network_offset(skb);
2109 vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
2110 vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2112 igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
2116 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2118 struct igbvf_adapter *adapter = netdev_priv(netdev);
2120 /* there is enough descriptors then we don't need to worry */
2121 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2124 netif_stop_queue(netdev);
2126 /* Herbert's original patch had:
2127 * smp_mb__after_netif_stop_queue();
2128 * but since that doesn't exist yet, just open code it.
2132 /* We need to check again just in case room has been made available */
2133 if (igbvf_desc_unused(adapter->tx_ring) < size)
2136 netif_wake_queue(netdev);
2138 ++adapter->restart_queue;
2142 #define IGBVF_MAX_TXD_PWR 16
2143 #define IGBVF_MAX_DATA_PER_TXD (1u << IGBVF_MAX_TXD_PWR)
2145 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2146 struct igbvf_ring *tx_ring,
2147 struct sk_buff *skb)
2149 struct igbvf_buffer *buffer_info;
2150 struct pci_dev *pdev = adapter->pdev;
2151 unsigned int len = skb_headlen(skb);
2152 unsigned int count = 0, i;
2155 i = tx_ring->next_to_use;
2157 buffer_info = &tx_ring->buffer_info[i];
2158 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2159 buffer_info->length = len;
2160 /* set time_stamp *before* dma to help avoid a possible race */
2161 buffer_info->time_stamp = jiffies;
2162 buffer_info->mapped_as_page = false;
2163 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2165 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2168 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2169 const skb_frag_t *frag;
2173 if (i == tx_ring->count)
2176 frag = &skb_shinfo(skb)->frags[f];
2177 len = skb_frag_size(frag);
2179 buffer_info = &tx_ring->buffer_info[i];
2180 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2181 buffer_info->length = len;
2182 buffer_info->time_stamp = jiffies;
2183 buffer_info->mapped_as_page = true;
2184 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2186 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2190 tx_ring->buffer_info[i].skb = skb;
2195 dev_err(&pdev->dev, "TX DMA map failed\n");
2197 /* clear timestamp and dma mappings for failed buffer_info mapping */
2198 buffer_info->dma = 0;
2199 buffer_info->time_stamp = 0;
2200 buffer_info->length = 0;
2201 buffer_info->mapped_as_page = false;
2205 /* clear timestamp and dma mappings for remaining portion of packet */
2208 i += tx_ring->count;
2210 buffer_info = &tx_ring->buffer_info[i];
2211 igbvf_put_txbuf(adapter, buffer_info);
2217 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2218 struct igbvf_ring *tx_ring,
2219 int tx_flags, int count,
2220 unsigned int first, u32 paylen,
2223 union e1000_adv_tx_desc *tx_desc = NULL;
2224 struct igbvf_buffer *buffer_info;
2225 u32 olinfo_status = 0, cmd_type_len;
2228 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2229 E1000_ADVTXD_DCMD_DEXT);
2231 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2232 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2234 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2235 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2237 /* insert tcp checksum */
2238 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2240 /* insert ip checksum */
2241 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2242 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2244 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2245 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2248 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2250 i = tx_ring->next_to_use;
2252 buffer_info = &tx_ring->buffer_info[i];
2253 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2254 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2255 tx_desc->read.cmd_type_len =
2256 cpu_to_le32(cmd_type_len | buffer_info->length);
2257 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2259 if (i == tx_ring->count)
2263 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2264 /* Force memory writes to complete before letting h/w
2265 * know there are new descriptors to fetch. (Only
2266 * applicable for weak-ordered memory model archs,
2271 tx_ring->buffer_info[first].next_to_watch = tx_desc;
2272 tx_ring->next_to_use = i;
2273 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2276 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2277 struct net_device *netdev,
2278 struct igbvf_ring *tx_ring)
2280 struct igbvf_adapter *adapter = netdev_priv(netdev);
2281 unsigned int first, tx_flags = 0;
2285 __be16 protocol = vlan_get_protocol(skb);
2287 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2288 dev_kfree_skb_any(skb);
2289 return NETDEV_TX_OK;
2292 if (skb->len <= 0) {
2293 dev_kfree_skb_any(skb);
2294 return NETDEV_TX_OK;
2297 /* need: count + 4 desc gap to keep tail from touching
2298 * + 2 desc gap to keep tail from touching head,
2299 * + 1 desc for skb->data,
2300 * + 1 desc for context descriptor,
2301 * head, otherwise try next time
2303 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2304 /* this is a hard error */
2305 return NETDEV_TX_BUSY;
2308 if (skb_vlan_tag_present(skb)) {
2309 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2310 tx_flags |= (skb_vlan_tag_get(skb) <<
2311 IGBVF_TX_FLAGS_VLAN_SHIFT);
2314 if (protocol == htons(ETH_P_IP))
2315 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2317 first = tx_ring->next_to_use;
2319 tso = igbvf_tso(tx_ring, skb, tx_flags, &hdr_len);
2320 if (unlikely(tso < 0)) {
2321 dev_kfree_skb_any(skb);
2322 return NETDEV_TX_OK;
2326 tx_flags |= IGBVF_TX_FLAGS_TSO;
2327 else if (igbvf_tx_csum(tx_ring, skb, tx_flags, protocol) &&
2328 (skb->ip_summed == CHECKSUM_PARTIAL))
2329 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2331 /* count reflects descriptors mapped, if 0 then mapping error
2332 * has occurred and we need to rewind the descriptor queue
2334 count = igbvf_tx_map_adv(adapter, tx_ring, skb);
2337 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2338 first, skb->len, hdr_len);
2339 /* Make sure there is space in the ring for the next send. */
2340 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2342 dev_kfree_skb_any(skb);
2343 tx_ring->buffer_info[first].time_stamp = 0;
2344 tx_ring->next_to_use = first;
2347 return NETDEV_TX_OK;
2350 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2351 struct net_device *netdev)
2353 struct igbvf_adapter *adapter = netdev_priv(netdev);
2354 struct igbvf_ring *tx_ring;
2356 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2357 dev_kfree_skb_any(skb);
2358 return NETDEV_TX_OK;
2361 tx_ring = &adapter->tx_ring[0];
2363 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2367 * igbvf_tx_timeout - Respond to a Tx Hang
2368 * @netdev: network interface device structure
2369 * @txqueue: queue timing out (unused)
2371 static void igbvf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
2373 struct igbvf_adapter *adapter = netdev_priv(netdev);
2375 /* Do the reset outside of interrupt context */
2376 adapter->tx_timeout_count++;
2377 schedule_work(&adapter->reset_task);
2380 static void igbvf_reset_task(struct work_struct *work)
2382 struct igbvf_adapter *adapter;
2384 adapter = container_of(work, struct igbvf_adapter, reset_task);
2386 igbvf_reinit_locked(adapter);
2390 * igbvf_change_mtu - Change the Maximum Transfer Unit
2391 * @netdev: network interface device structure
2392 * @new_mtu: new value for maximum frame size
2394 * Returns 0 on success, negative on failure
2396 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2398 struct igbvf_adapter *adapter = netdev_priv(netdev);
2399 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2401 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2402 usleep_range(1000, 2000);
2403 /* igbvf_down has a dependency on max_frame_size */
2404 adapter->max_frame_size = max_frame;
2405 if (netif_running(netdev))
2406 igbvf_down(adapter);
2408 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2409 * means we reserve 2 more, this pushes us to allocate from the next
2411 * i.e. RXBUFFER_2048 --> size-4096 slab
2412 * However with the new *_jumbo_rx* routines, jumbo receives will use
2416 if (max_frame <= 1024)
2417 adapter->rx_buffer_len = 1024;
2418 else if (max_frame <= 2048)
2419 adapter->rx_buffer_len = 2048;
2421 #if (PAGE_SIZE / 2) > 16384
2422 adapter->rx_buffer_len = 16384;
2424 adapter->rx_buffer_len = PAGE_SIZE / 2;
2427 /* adjust allocation if LPE protects us, and we aren't using SBP */
2428 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2429 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2430 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2433 netdev_dbg(netdev, "changing MTU from %d to %d\n",
2434 netdev->mtu, new_mtu);
2435 netdev->mtu = new_mtu;
2437 if (netif_running(netdev))
2440 igbvf_reset(adapter);
2442 clear_bit(__IGBVF_RESETTING, &adapter->state);
2447 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2455 static int igbvf_suspend(struct device *dev_d)
2457 struct net_device *netdev = dev_get_drvdata(dev_d);
2458 struct igbvf_adapter *adapter = netdev_priv(netdev);
2460 netif_device_detach(netdev);
2462 if (netif_running(netdev)) {
2463 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2464 igbvf_down(adapter);
2465 igbvf_free_irq(adapter);
2471 static int __maybe_unused igbvf_resume(struct device *dev_d)
2473 struct pci_dev *pdev = to_pci_dev(dev_d);
2474 struct net_device *netdev = pci_get_drvdata(pdev);
2475 struct igbvf_adapter *adapter = netdev_priv(netdev);
2478 pci_set_master(pdev);
2480 if (netif_running(netdev)) {
2481 err = igbvf_request_irq(adapter);
2486 igbvf_reset(adapter);
2488 if (netif_running(netdev))
2491 netif_device_attach(netdev);
2496 static void igbvf_shutdown(struct pci_dev *pdev)
2498 igbvf_suspend(&pdev->dev);
2501 #ifdef CONFIG_NET_POLL_CONTROLLER
2502 /* Polling 'interrupt' - used by things like netconsole to send skbs
2503 * without having to re-enable interrupts. It's not called while
2504 * the interrupt routine is executing.
2506 static void igbvf_netpoll(struct net_device *netdev)
2508 struct igbvf_adapter *adapter = netdev_priv(netdev);
2510 disable_irq(adapter->pdev->irq);
2512 igbvf_clean_tx_irq(adapter->tx_ring);
2514 enable_irq(adapter->pdev->irq);
2519 * igbvf_io_error_detected - called when PCI error is detected
2520 * @pdev: Pointer to PCI device
2521 * @state: The current pci connection state
2523 * This function is called after a PCI bus error affecting
2524 * this device has been detected.
2526 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2527 pci_channel_state_t state)
2529 struct net_device *netdev = pci_get_drvdata(pdev);
2530 struct igbvf_adapter *adapter = netdev_priv(netdev);
2532 netif_device_detach(netdev);
2534 if (state == pci_channel_io_perm_failure)
2535 return PCI_ERS_RESULT_DISCONNECT;
2537 if (netif_running(netdev))
2538 igbvf_down(adapter);
2539 pci_disable_device(pdev);
2541 /* Request a slot slot reset. */
2542 return PCI_ERS_RESULT_NEED_RESET;
2546 * igbvf_io_slot_reset - called after the pci bus has been reset.
2547 * @pdev: Pointer to PCI device
2549 * Restart the card from scratch, as if from a cold-boot. Implementation
2550 * resembles the first-half of the igbvf_resume routine.
2552 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2554 struct net_device *netdev = pci_get_drvdata(pdev);
2555 struct igbvf_adapter *adapter = netdev_priv(netdev);
2557 if (pci_enable_device_mem(pdev)) {
2559 "Cannot re-enable PCI device after reset.\n");
2560 return PCI_ERS_RESULT_DISCONNECT;
2562 pci_set_master(pdev);
2564 igbvf_reset(adapter);
2566 return PCI_ERS_RESULT_RECOVERED;
2570 * igbvf_io_resume - called when traffic can start flowing again.
2571 * @pdev: Pointer to PCI device
2573 * This callback is called when the error recovery driver tells us that
2574 * its OK to resume normal operation. Implementation resembles the
2575 * second-half of the igbvf_resume routine.
2577 static void igbvf_io_resume(struct pci_dev *pdev)
2579 struct net_device *netdev = pci_get_drvdata(pdev);
2580 struct igbvf_adapter *adapter = netdev_priv(netdev);
2582 if (netif_running(netdev)) {
2583 if (igbvf_up(adapter)) {
2585 "can't bring device back up after reset\n");
2590 netif_device_attach(netdev);
2593 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2595 struct e1000_hw *hw = &adapter->hw;
2596 struct net_device *netdev = adapter->netdev;
2597 struct pci_dev *pdev = adapter->pdev;
2599 if (hw->mac.type == e1000_vfadapt_i350)
2600 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2602 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2603 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2606 static int igbvf_set_features(struct net_device *netdev,
2607 netdev_features_t features)
2609 struct igbvf_adapter *adapter = netdev_priv(netdev);
2611 if (features & NETIF_F_RXCSUM)
2612 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2614 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2619 #define IGBVF_MAX_MAC_HDR_LEN 127
2620 #define IGBVF_MAX_NETWORK_HDR_LEN 511
2622 static netdev_features_t
2623 igbvf_features_check(struct sk_buff *skb, struct net_device *dev,
2624 netdev_features_t features)
2626 unsigned int network_hdr_len, mac_hdr_len;
2628 /* Make certain the headers can be described by a context descriptor */
2629 mac_hdr_len = skb_network_header(skb) - skb->data;
2630 if (unlikely(mac_hdr_len > IGBVF_MAX_MAC_HDR_LEN))
2631 return features & ~(NETIF_F_HW_CSUM |
2633 NETIF_F_HW_VLAN_CTAG_TX |
2637 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
2638 if (unlikely(network_hdr_len > IGBVF_MAX_NETWORK_HDR_LEN))
2639 return features & ~(NETIF_F_HW_CSUM |
2644 /* We can only support IPV4 TSO in tunnels if we can mangle the
2645 * inner IP ID field, so strip TSO if MANGLEID is not supported.
2647 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
2648 features &= ~NETIF_F_TSO;
2653 static const struct net_device_ops igbvf_netdev_ops = {
2654 .ndo_open = igbvf_open,
2655 .ndo_stop = igbvf_close,
2656 .ndo_start_xmit = igbvf_xmit_frame,
2657 .ndo_set_rx_mode = igbvf_set_rx_mode,
2658 .ndo_set_mac_address = igbvf_set_mac,
2659 .ndo_change_mtu = igbvf_change_mtu,
2660 .ndo_do_ioctl = igbvf_ioctl,
2661 .ndo_tx_timeout = igbvf_tx_timeout,
2662 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2663 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2664 #ifdef CONFIG_NET_POLL_CONTROLLER
2665 .ndo_poll_controller = igbvf_netpoll,
2667 .ndo_set_features = igbvf_set_features,
2668 .ndo_features_check = igbvf_features_check,
2672 * igbvf_probe - Device Initialization Routine
2673 * @pdev: PCI device information struct
2674 * @ent: entry in igbvf_pci_tbl
2676 * Returns 0 on success, negative on failure
2678 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2679 * The OS initialization, configuring of the adapter private structure,
2680 * and a hardware reset occur.
2682 static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2684 struct net_device *netdev;
2685 struct igbvf_adapter *adapter;
2686 struct e1000_hw *hw;
2687 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2689 static int cards_found;
2690 int err, pci_using_dac;
2692 err = pci_enable_device_mem(pdev);
2697 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2701 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2704 "No usable DMA configuration, aborting\n");
2709 err = pci_request_regions(pdev, igbvf_driver_name);
2713 pci_set_master(pdev);
2716 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2718 goto err_alloc_etherdev;
2720 SET_NETDEV_DEV(netdev, &pdev->dev);
2722 pci_set_drvdata(pdev, netdev);
2723 adapter = netdev_priv(netdev);
2725 adapter->netdev = netdev;
2726 adapter->pdev = pdev;
2728 adapter->pba = ei->pba;
2729 adapter->flags = ei->flags;
2730 adapter->hw.back = adapter;
2731 adapter->hw.mac.type = ei->mac;
2732 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2734 /* PCI config space info */
2736 hw->vendor_id = pdev->vendor;
2737 hw->device_id = pdev->device;
2738 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2739 hw->subsystem_device_id = pdev->subsystem_device;
2740 hw->revision_id = pdev->revision;
2743 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2744 pci_resource_len(pdev, 0));
2746 if (!adapter->hw.hw_addr)
2749 if (ei->get_variants) {
2750 err = ei->get_variants(adapter);
2752 goto err_get_variants;
2755 /* setup adapter struct */
2756 err = igbvf_sw_init(adapter);
2760 /* construct the net_device struct */
2761 netdev->netdev_ops = &igbvf_netdev_ops;
2763 igbvf_set_ethtool_ops(netdev);
2764 netdev->watchdog_timeo = 5 * HZ;
2765 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2767 adapter->bd_number = cards_found++;
2769 netdev->hw_features = NETIF_F_SG |
2776 #define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
2777 NETIF_F_GSO_GRE_CSUM | \
2778 NETIF_F_GSO_IPXIP4 | \
2779 NETIF_F_GSO_IPXIP6 | \
2780 NETIF_F_GSO_UDP_TUNNEL | \
2781 NETIF_F_GSO_UDP_TUNNEL_CSUM)
2783 netdev->gso_partial_features = IGBVF_GSO_PARTIAL_FEATURES;
2784 netdev->hw_features |= NETIF_F_GSO_PARTIAL |
2785 IGBVF_GSO_PARTIAL_FEATURES;
2787 netdev->features = netdev->hw_features;
2790 netdev->features |= NETIF_F_HIGHDMA;
2792 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
2793 netdev->mpls_features |= NETIF_F_HW_CSUM;
2794 netdev->hw_enc_features |= netdev->vlan_features;
2796 /* set this bit last since it cannot be part of vlan_features */
2797 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
2798 NETIF_F_HW_VLAN_CTAG_RX |
2799 NETIF_F_HW_VLAN_CTAG_TX;
2801 /* MTU range: 68 - 9216 */
2802 netdev->min_mtu = ETH_MIN_MTU;
2803 netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
2805 spin_lock_bh(&hw->mbx_lock);
2807 /*reset the controller to put the device in a known good state */
2808 err = hw->mac.ops.reset_hw(hw);
2810 dev_info(&pdev->dev,
2811 "PF still in reset state. Is the PF interface up?\n");
2813 err = hw->mac.ops.read_mac_addr(hw);
2815 dev_info(&pdev->dev, "Error reading MAC address.\n");
2816 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2817 dev_info(&pdev->dev,
2818 "MAC address not assigned by administrator.\n");
2819 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2823 spin_unlock_bh(&hw->mbx_lock);
2825 if (!is_valid_ether_addr(netdev->dev_addr)) {
2826 dev_info(&pdev->dev, "Assigning random MAC address.\n");
2827 eth_hw_addr_random(netdev);
2828 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2832 timer_setup(&adapter->watchdog_timer, igbvf_watchdog, 0);
2834 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2835 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2837 /* ring size defaults */
2838 adapter->rx_ring->count = 1024;
2839 adapter->tx_ring->count = 1024;
2841 /* reset the hardware with the new settings */
2842 igbvf_reset(adapter);
2844 /* set hardware-specific flags */
2845 if (adapter->hw.mac.type == e1000_vfadapt_i350)
2846 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP;
2848 strcpy(netdev->name, "eth%d");
2849 err = register_netdev(netdev);
2853 /* tell the stack to leave us alone until igbvf_open() is called */
2854 netif_carrier_off(netdev);
2855 netif_stop_queue(netdev);
2857 igbvf_print_device_info(adapter);
2859 igbvf_initialize_last_counter_stats(adapter);
2864 kfree(adapter->tx_ring);
2865 kfree(adapter->rx_ring);
2867 igbvf_reset_interrupt_capability(adapter);
2869 iounmap(adapter->hw.hw_addr);
2871 free_netdev(netdev);
2873 pci_release_regions(pdev);
2876 pci_disable_device(pdev);
2881 * igbvf_remove - Device Removal Routine
2882 * @pdev: PCI device information struct
2884 * igbvf_remove is called by the PCI subsystem to alert the driver
2885 * that it should release a PCI device. The could be caused by a
2886 * Hot-Plug event, or because the driver is going to be removed from
2889 static void igbvf_remove(struct pci_dev *pdev)
2891 struct net_device *netdev = pci_get_drvdata(pdev);
2892 struct igbvf_adapter *adapter = netdev_priv(netdev);
2893 struct e1000_hw *hw = &adapter->hw;
2895 /* The watchdog timer may be rescheduled, so explicitly
2896 * disable it from being rescheduled.
2898 set_bit(__IGBVF_DOWN, &adapter->state);
2899 del_timer_sync(&adapter->watchdog_timer);
2901 cancel_work_sync(&adapter->reset_task);
2902 cancel_work_sync(&adapter->watchdog_task);
2904 unregister_netdev(netdev);
2906 igbvf_reset_interrupt_capability(adapter);
2908 /* it is important to delete the NAPI struct prior to freeing the
2909 * Rx ring so that you do not end up with null pointer refs
2911 netif_napi_del(&adapter->rx_ring->napi);
2912 kfree(adapter->tx_ring);
2913 kfree(adapter->rx_ring);
2915 iounmap(hw->hw_addr);
2916 if (hw->flash_address)
2917 iounmap(hw->flash_address);
2918 pci_release_regions(pdev);
2920 free_netdev(netdev);
2922 pci_disable_device(pdev);
2925 /* PCI Error Recovery (ERS) */
2926 static const struct pci_error_handlers igbvf_err_handler = {
2927 .error_detected = igbvf_io_error_detected,
2928 .slot_reset = igbvf_io_slot_reset,
2929 .resume = igbvf_io_resume,
2932 static const struct pci_device_id igbvf_pci_tbl[] = {
2933 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2934 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2935 { } /* terminate list */
2937 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2939 static SIMPLE_DEV_PM_OPS(igbvf_pm_ops, igbvf_suspend, igbvf_resume);
2941 /* PCI Device API Driver */
2942 static struct pci_driver igbvf_driver = {
2943 .name = igbvf_driver_name,
2944 .id_table = igbvf_pci_tbl,
2945 .probe = igbvf_probe,
2946 .remove = igbvf_remove,
2947 .driver.pm = &igbvf_pm_ops,
2948 .shutdown = igbvf_shutdown,
2949 .err_handler = &igbvf_err_handler
2953 * igbvf_init_module - Driver Registration Routine
2955 * igbvf_init_module is the first routine called when the driver is
2956 * loaded. All it does is register with the PCI subsystem.
2958 static int __init igbvf_init_module(void)
2962 pr_info("%s\n", igbvf_driver_string);
2963 pr_info("%s\n", igbvf_copyright);
2965 ret = pci_register_driver(&igbvf_driver);
2969 module_init(igbvf_init_module);
2972 * igbvf_exit_module - Driver Exit Cleanup Routine
2974 * igbvf_exit_module is called just before the driver is removed
2977 static void __exit igbvf_exit_module(void)
2979 pci_unregister_driver(&igbvf_driver);
2981 module_exit(igbvf_exit_module);
2983 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2984 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
2985 MODULE_LICENSE("GPL v2");