1 /*******************************************************************************
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 - 2012 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, see <http://www.gnu.org/licenses/>.
18 The full GNU General Public License is included in this distribution in
19 the file called "COPYING".
22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *******************************************************************************/
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29 #include <linux/module.h>
30 #include <linux/types.h>
31 #include <linux/init.h>
32 #include <linux/pci.h>
33 #include <linux/vmalloc.h>
34 #include <linux/pagemap.h>
35 #include <linux/delay.h>
36 #include <linux/netdevice.h>
37 #include <linux/tcp.h>
38 #include <linux/ipv6.h>
39 #include <linux/slab.h>
40 #include <net/checksum.h>
41 #include <net/ip6_checksum.h>
42 #include <linux/mii.h>
43 #include <linux/ethtool.h>
44 #include <linux/if_vlan.h>
45 #include <linux/prefetch.h>
49 #define DRV_VERSION "2.0.2-k"
50 char igbvf_driver_name[] = "igbvf";
51 const char igbvf_driver_version[] = DRV_VERSION;
52 static const char igbvf_driver_string[] =
53 "Intel(R) Gigabit Virtual Function Network Driver";
54 static const char igbvf_copyright[] =
55 "Copyright (c) 2009 - 2012 Intel Corporation.";
57 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
58 static int debug = -1;
59 module_param(debug, int, 0);
60 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
62 static int igbvf_poll(struct napi_struct *napi, int budget);
63 static void igbvf_reset(struct igbvf_adapter *);
64 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
65 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
67 static struct igbvf_info igbvf_vf_info = {
71 .init_ops = e1000_init_function_pointers_vf,
74 static struct igbvf_info igbvf_i350_vf_info = {
75 .mac = e1000_vfadapt_i350,
78 .init_ops = e1000_init_function_pointers_vf,
81 static const struct igbvf_info *igbvf_info_tbl[] = {
82 [board_vf] = &igbvf_vf_info,
83 [board_i350_vf] = &igbvf_i350_vf_info,
87 * igbvf_desc_unused - calculate if we have unused descriptors
88 * @rx_ring: address of receive ring structure
90 static int igbvf_desc_unused(struct igbvf_ring *ring)
92 if (ring->next_to_clean > ring->next_to_use)
93 return ring->next_to_clean - ring->next_to_use - 1;
95 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
99 * igbvf_receive_skb - helper function to handle Rx indications
100 * @adapter: board private structure
101 * @status: descriptor status field as written by hardware
102 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
103 * @skb: pointer to sk_buff to be indicated to stack
105 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
106 struct net_device *netdev,
108 u32 status, u16 vlan)
112 if (status & E1000_RXD_STAT_VP) {
113 if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) &&
114 (status & E1000_RXDEXT_STATERR_LB))
115 vid = be16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
117 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
118 if (test_bit(vid, adapter->active_vlans))
119 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
122 napi_gro_receive(&adapter->rx_ring->napi, skb);
125 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
126 u32 status_err, struct sk_buff *skb)
128 skb_checksum_none_assert(skb);
130 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
131 if ((status_err & E1000_RXD_STAT_IXSM) ||
132 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
135 /* TCP/UDP checksum error bit is set */
137 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
138 /* let the stack verify checksum errors */
139 adapter->hw_csum_err++;
143 /* It must be a TCP or UDP packet with a valid checksum */
144 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
145 skb->ip_summed = CHECKSUM_UNNECESSARY;
147 adapter->hw_csum_good++;
151 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
152 * @rx_ring: address of ring structure to repopulate
153 * @cleaned_count: number of buffers to repopulate
155 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
158 struct igbvf_adapter *adapter = rx_ring->adapter;
159 struct net_device *netdev = adapter->netdev;
160 struct pci_dev *pdev = adapter->pdev;
161 union e1000_adv_rx_desc *rx_desc;
162 struct igbvf_buffer *buffer_info;
167 i = rx_ring->next_to_use;
168 buffer_info = &rx_ring->buffer_info[i];
170 if (adapter->rx_ps_hdr_size)
171 bufsz = adapter->rx_ps_hdr_size;
173 bufsz = adapter->rx_buffer_len;
175 while (cleaned_count--) {
176 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
178 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
179 if (!buffer_info->page) {
180 buffer_info->page = alloc_page(GFP_ATOMIC);
181 if (!buffer_info->page) {
182 adapter->alloc_rx_buff_failed++;
185 buffer_info->page_offset = 0;
187 buffer_info->page_offset ^= PAGE_SIZE / 2;
189 buffer_info->page_dma =
190 dma_map_page(&pdev->dev, buffer_info->page,
191 buffer_info->page_offset,
194 if (dma_mapping_error(&pdev->dev,
195 buffer_info->page_dma)) {
196 __free_page(buffer_info->page);
197 buffer_info->page = NULL;
198 dev_err(&pdev->dev, "RX DMA map failed\n");
203 if (!buffer_info->skb) {
204 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
206 adapter->alloc_rx_buff_failed++;
210 buffer_info->skb = skb;
211 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
214 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
215 dev_kfree_skb(buffer_info->skb);
216 buffer_info->skb = NULL;
217 dev_err(&pdev->dev, "RX DMA map failed\n");
221 /* Refresh the desc even if buffer_addrs didn't change because
222 * each write-back erases this info.
224 if (adapter->rx_ps_hdr_size) {
225 rx_desc->read.pkt_addr =
226 cpu_to_le64(buffer_info->page_dma);
227 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
229 rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
230 rx_desc->read.hdr_addr = 0;
234 if (i == rx_ring->count)
236 buffer_info = &rx_ring->buffer_info[i];
240 if (rx_ring->next_to_use != i) {
241 rx_ring->next_to_use = i;
243 i = (rx_ring->count - 1);
247 /* Force memory writes to complete before letting h/w
248 * know there are new descriptors to fetch. (Only
249 * applicable for weak-ordered memory model archs,
253 writel(i, adapter->hw.hw_addr + rx_ring->tail);
258 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
259 * @adapter: board private structure
261 * the return value indicates whether actual cleaning was done, there
262 * is no guarantee that everything was cleaned
264 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
265 int *work_done, int work_to_do)
267 struct igbvf_ring *rx_ring = adapter->rx_ring;
268 struct net_device *netdev = adapter->netdev;
269 struct pci_dev *pdev = adapter->pdev;
270 union e1000_adv_rx_desc *rx_desc, *next_rxd;
271 struct igbvf_buffer *buffer_info, *next_buffer;
273 bool cleaned = false;
274 int cleaned_count = 0;
275 unsigned int total_bytes = 0, total_packets = 0;
277 u32 length, hlen, staterr;
279 i = rx_ring->next_to_clean;
280 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
281 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
283 while (staterr & E1000_RXD_STAT_DD) {
284 if (*work_done >= work_to_do)
287 rmb(); /* read descriptor and rx_buffer_info after status DD */
289 buffer_info = &rx_ring->buffer_info[i];
291 /* HW will not DMA in data larger than the given buffer, even
292 * if it parses the (NFS, of course) header to be larger. In
293 * that case, it fills the header buffer and spills the rest
296 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info)
297 & E1000_RXDADV_HDRBUFLEN_MASK) >>
298 E1000_RXDADV_HDRBUFLEN_SHIFT;
299 if (hlen > adapter->rx_ps_hdr_size)
300 hlen = adapter->rx_ps_hdr_size;
302 length = le16_to_cpu(rx_desc->wb.upper.length);
306 skb = buffer_info->skb;
307 prefetch(skb->data - NET_IP_ALIGN);
308 buffer_info->skb = NULL;
309 if (!adapter->rx_ps_hdr_size) {
310 dma_unmap_single(&pdev->dev, buffer_info->dma,
311 adapter->rx_buffer_len,
313 buffer_info->dma = 0;
314 skb_put(skb, length);
318 if (!skb_shinfo(skb)->nr_frags) {
319 dma_unmap_single(&pdev->dev, buffer_info->dma,
320 adapter->rx_ps_hdr_size,
322 buffer_info->dma = 0;
327 dma_unmap_page(&pdev->dev, buffer_info->page_dma,
330 buffer_info->page_dma = 0;
332 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
334 buffer_info->page_offset,
337 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
338 (page_count(buffer_info->page) != 1))
339 buffer_info->page = NULL;
341 get_page(buffer_info->page);
344 skb->data_len += length;
345 skb->truesize += PAGE_SIZE / 2;
349 if (i == rx_ring->count)
351 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
353 next_buffer = &rx_ring->buffer_info[i];
355 if (!(staterr & E1000_RXD_STAT_EOP)) {
356 buffer_info->skb = next_buffer->skb;
357 buffer_info->dma = next_buffer->dma;
358 next_buffer->skb = skb;
359 next_buffer->dma = 0;
363 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
364 dev_kfree_skb_irq(skb);
368 total_bytes += skb->len;
371 igbvf_rx_checksum_adv(adapter, staterr, skb);
373 skb->protocol = eth_type_trans(skb, netdev);
375 igbvf_receive_skb(adapter, netdev, skb, staterr,
376 rx_desc->wb.upper.vlan);
379 rx_desc->wb.upper.status_error = 0;
381 /* return some buffers to hardware, one at a time is too slow */
382 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
383 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
387 /* use prefetched values */
389 buffer_info = next_buffer;
391 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
394 rx_ring->next_to_clean = i;
395 cleaned_count = igbvf_desc_unused(rx_ring);
398 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
400 adapter->total_rx_packets += total_packets;
401 adapter->total_rx_bytes += total_bytes;
402 adapter->net_stats.rx_bytes += total_bytes;
403 adapter->net_stats.rx_packets += total_packets;
407 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
408 struct igbvf_buffer *buffer_info)
410 if (buffer_info->dma) {
411 if (buffer_info->mapped_as_page)
412 dma_unmap_page(&adapter->pdev->dev,
417 dma_unmap_single(&adapter->pdev->dev,
421 buffer_info->dma = 0;
423 if (buffer_info->skb) {
424 dev_kfree_skb_any(buffer_info->skb);
425 buffer_info->skb = NULL;
427 buffer_info->time_stamp = 0;
431 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
432 * @adapter: board private structure
434 * Return 0 on success, negative on failure
436 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
437 struct igbvf_ring *tx_ring)
439 struct pci_dev *pdev = adapter->pdev;
442 size = sizeof(struct igbvf_buffer) * tx_ring->count;
443 tx_ring->buffer_info = vzalloc(size);
444 if (!tx_ring->buffer_info)
447 /* round up to nearest 4K */
448 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
449 tx_ring->size = ALIGN(tx_ring->size, 4096);
451 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
452 &tx_ring->dma, GFP_KERNEL);
456 tx_ring->adapter = adapter;
457 tx_ring->next_to_use = 0;
458 tx_ring->next_to_clean = 0;
462 vfree(tx_ring->buffer_info);
463 dev_err(&adapter->pdev->dev,
464 "Unable to allocate memory for the transmit descriptor ring\n");
469 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
470 * @adapter: board private structure
472 * Returns 0 on success, negative on failure
474 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
475 struct igbvf_ring *rx_ring)
477 struct pci_dev *pdev = adapter->pdev;
480 size = sizeof(struct igbvf_buffer) * rx_ring->count;
481 rx_ring->buffer_info = vzalloc(size);
482 if (!rx_ring->buffer_info)
485 desc_len = sizeof(union e1000_adv_rx_desc);
487 /* Round up to nearest 4K */
488 rx_ring->size = rx_ring->count * desc_len;
489 rx_ring->size = ALIGN(rx_ring->size, 4096);
491 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
492 &rx_ring->dma, GFP_KERNEL);
496 rx_ring->next_to_clean = 0;
497 rx_ring->next_to_use = 0;
499 rx_ring->adapter = adapter;
504 vfree(rx_ring->buffer_info);
505 rx_ring->buffer_info = NULL;
506 dev_err(&adapter->pdev->dev,
507 "Unable to allocate memory for the receive descriptor ring\n");
512 * igbvf_clean_tx_ring - Free Tx Buffers
513 * @tx_ring: ring to be cleaned
515 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
517 struct igbvf_adapter *adapter = tx_ring->adapter;
518 struct igbvf_buffer *buffer_info;
522 if (!tx_ring->buffer_info)
525 /* Free all the Tx ring sk_buffs */
526 for (i = 0; i < tx_ring->count; i++) {
527 buffer_info = &tx_ring->buffer_info[i];
528 igbvf_put_txbuf(adapter, buffer_info);
531 size = sizeof(struct igbvf_buffer) * tx_ring->count;
532 memset(tx_ring->buffer_info, 0, size);
534 /* Zero out the descriptor ring */
535 memset(tx_ring->desc, 0, tx_ring->size);
537 tx_ring->next_to_use = 0;
538 tx_ring->next_to_clean = 0;
540 writel(0, adapter->hw.hw_addr + tx_ring->head);
541 writel(0, adapter->hw.hw_addr + tx_ring->tail);
545 * igbvf_free_tx_resources - Free Tx Resources per Queue
546 * @tx_ring: ring to free resources from
548 * Free all transmit software resources
550 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
552 struct pci_dev *pdev = tx_ring->adapter->pdev;
554 igbvf_clean_tx_ring(tx_ring);
556 vfree(tx_ring->buffer_info);
557 tx_ring->buffer_info = NULL;
559 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
562 tx_ring->desc = NULL;
566 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
567 * @adapter: board private structure
569 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
571 struct igbvf_adapter *adapter = rx_ring->adapter;
572 struct igbvf_buffer *buffer_info;
573 struct pci_dev *pdev = adapter->pdev;
577 if (!rx_ring->buffer_info)
580 /* Free all the Rx ring sk_buffs */
581 for (i = 0; i < rx_ring->count; i++) {
582 buffer_info = &rx_ring->buffer_info[i];
583 if (buffer_info->dma) {
584 if (adapter->rx_ps_hdr_size) {
585 dma_unmap_single(&pdev->dev, buffer_info->dma,
586 adapter->rx_ps_hdr_size,
589 dma_unmap_single(&pdev->dev, buffer_info->dma,
590 adapter->rx_buffer_len,
593 buffer_info->dma = 0;
596 if (buffer_info->skb) {
597 dev_kfree_skb(buffer_info->skb);
598 buffer_info->skb = NULL;
601 if (buffer_info->page) {
602 if (buffer_info->page_dma)
603 dma_unmap_page(&pdev->dev,
604 buffer_info->page_dma,
607 put_page(buffer_info->page);
608 buffer_info->page = NULL;
609 buffer_info->page_dma = 0;
610 buffer_info->page_offset = 0;
614 size = sizeof(struct igbvf_buffer) * rx_ring->count;
615 memset(rx_ring->buffer_info, 0, size);
617 /* Zero out the descriptor ring */
618 memset(rx_ring->desc, 0, rx_ring->size);
620 rx_ring->next_to_clean = 0;
621 rx_ring->next_to_use = 0;
623 writel(0, adapter->hw.hw_addr + rx_ring->head);
624 writel(0, adapter->hw.hw_addr + rx_ring->tail);
628 * igbvf_free_rx_resources - Free Rx Resources
629 * @rx_ring: ring to clean the resources from
631 * Free all receive software resources
634 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
636 struct pci_dev *pdev = rx_ring->adapter->pdev;
638 igbvf_clean_rx_ring(rx_ring);
640 vfree(rx_ring->buffer_info);
641 rx_ring->buffer_info = NULL;
643 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
645 rx_ring->desc = NULL;
649 * igbvf_update_itr - update the dynamic ITR value based on statistics
650 * @adapter: pointer to adapter
651 * @itr_setting: current adapter->itr
652 * @packets: the number of packets during this measurement interval
653 * @bytes: the number of bytes during this measurement interval
655 * Stores a new ITR value based on packets and byte counts during the last
656 * interrupt. The advantage of per interrupt computation is faster updates
657 * and more accurate ITR for the current traffic pattern. Constants in this
658 * function were computed based on theoretical maximum wire speed and thresholds
659 * were set based on testing data as well as attempting to minimize response
660 * time while increasing bulk throughput.
662 static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter,
663 enum latency_range itr_setting,
664 int packets, int bytes)
666 enum latency_range retval = itr_setting;
669 goto update_itr_done;
671 switch (itr_setting) {
673 /* handle TSO and jumbo frames */
674 if (bytes/packets > 8000)
675 retval = bulk_latency;
676 else if ((packets < 5) && (bytes > 512))
677 retval = low_latency;
679 case low_latency: /* 50 usec aka 20000 ints/s */
681 /* this if handles the TSO accounting */
682 if (bytes/packets > 8000)
683 retval = bulk_latency;
684 else if ((packets < 10) || ((bytes/packets) > 1200))
685 retval = bulk_latency;
686 else if ((packets > 35))
687 retval = lowest_latency;
688 } else if (bytes/packets > 2000) {
689 retval = bulk_latency;
690 } else if (packets <= 2 && bytes < 512) {
691 retval = lowest_latency;
694 case bulk_latency: /* 250 usec aka 4000 ints/s */
697 retval = low_latency;
698 } else if (bytes < 6000) {
699 retval = low_latency;
710 static int igbvf_range_to_itr(enum latency_range current_range)
714 switch (current_range) {
715 /* counts and packets in update_itr are dependent on these numbers */
717 new_itr = IGBVF_70K_ITR;
720 new_itr = IGBVF_20K_ITR;
723 new_itr = IGBVF_4K_ITR;
726 new_itr = IGBVF_START_ITR;
732 static void igbvf_set_itr(struct igbvf_adapter *adapter)
736 adapter->tx_ring->itr_range =
737 igbvf_update_itr(adapter,
738 adapter->tx_ring->itr_val,
739 adapter->total_tx_packets,
740 adapter->total_tx_bytes);
742 /* conservative mode (itr 3) eliminates the lowest_latency setting */
743 if (adapter->requested_itr == 3 &&
744 adapter->tx_ring->itr_range == lowest_latency)
745 adapter->tx_ring->itr_range = low_latency;
747 new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range);
749 if (new_itr != adapter->tx_ring->itr_val) {
750 u32 current_itr = adapter->tx_ring->itr_val;
751 /* this attempts to bias the interrupt rate towards Bulk
752 * by adding intermediate steps when interrupt rate is
755 new_itr = new_itr > current_itr ?
756 min(current_itr + (new_itr >> 2), new_itr) :
758 adapter->tx_ring->itr_val = new_itr;
760 adapter->tx_ring->set_itr = 1;
763 adapter->rx_ring->itr_range =
764 igbvf_update_itr(adapter, adapter->rx_ring->itr_val,
765 adapter->total_rx_packets,
766 adapter->total_rx_bytes);
767 if (adapter->requested_itr == 3 &&
768 adapter->rx_ring->itr_range == lowest_latency)
769 adapter->rx_ring->itr_range = low_latency;
771 new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range);
773 if (new_itr != adapter->rx_ring->itr_val) {
774 u32 current_itr = adapter->rx_ring->itr_val;
776 new_itr = new_itr > current_itr ?
777 min(current_itr + (new_itr >> 2), new_itr) :
779 adapter->rx_ring->itr_val = new_itr;
781 adapter->rx_ring->set_itr = 1;
786 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
787 * @adapter: board private structure
789 * returns true if ring is completely cleaned
791 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
793 struct igbvf_adapter *adapter = tx_ring->adapter;
794 struct net_device *netdev = adapter->netdev;
795 struct igbvf_buffer *buffer_info;
797 union e1000_adv_tx_desc *tx_desc, *eop_desc;
798 unsigned int total_bytes = 0, total_packets = 0;
799 unsigned int i, count = 0;
800 bool cleaned = false;
802 i = tx_ring->next_to_clean;
803 buffer_info = &tx_ring->buffer_info[i];
804 eop_desc = buffer_info->next_to_watch;
807 /* if next_to_watch is not set then there is no work pending */
811 /* prevent any other reads prior to eop_desc */
814 /* if DD is not set pending work has not been completed */
815 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)))
818 /* clear next_to_watch to prevent false hangs */
819 buffer_info->next_to_watch = NULL;
821 for (cleaned = false; !cleaned; count++) {
822 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
823 cleaned = (tx_desc == eop_desc);
824 skb = buffer_info->skb;
827 unsigned int segs, bytecount;
829 /* gso_segs is currently only valid for tcp */
830 segs = skb_shinfo(skb)->gso_segs ?: 1;
831 /* multiply data chunks by size of headers */
832 bytecount = ((segs - 1) * skb_headlen(skb)) +
834 total_packets += segs;
835 total_bytes += bytecount;
838 igbvf_put_txbuf(adapter, buffer_info);
839 tx_desc->wb.status = 0;
842 if (i == tx_ring->count)
845 buffer_info = &tx_ring->buffer_info[i];
848 eop_desc = buffer_info->next_to_watch;
849 } while (count < tx_ring->count);
851 tx_ring->next_to_clean = i;
853 if (unlikely(count && netif_carrier_ok(netdev) &&
854 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
855 /* Make sure that anybody stopping the queue after this
856 * sees the new next_to_clean.
859 if (netif_queue_stopped(netdev) &&
860 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
861 netif_wake_queue(netdev);
862 ++adapter->restart_queue;
866 adapter->net_stats.tx_bytes += total_bytes;
867 adapter->net_stats.tx_packets += total_packets;
868 return count < tx_ring->count;
871 static irqreturn_t igbvf_msix_other(int irq, void *data)
873 struct net_device *netdev = data;
874 struct igbvf_adapter *adapter = netdev_priv(netdev);
875 struct e1000_hw *hw = &adapter->hw;
877 adapter->int_counter1++;
879 netif_carrier_off(netdev);
880 hw->mac.get_link_status = 1;
881 if (!test_bit(__IGBVF_DOWN, &adapter->state))
882 mod_timer(&adapter->watchdog_timer, jiffies + 1);
884 ew32(EIMS, adapter->eims_other);
889 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
891 struct net_device *netdev = data;
892 struct igbvf_adapter *adapter = netdev_priv(netdev);
893 struct e1000_hw *hw = &adapter->hw;
894 struct igbvf_ring *tx_ring = adapter->tx_ring;
896 if (tx_ring->set_itr) {
897 writel(tx_ring->itr_val,
898 adapter->hw.hw_addr + tx_ring->itr_register);
899 adapter->tx_ring->set_itr = 0;
902 adapter->total_tx_bytes = 0;
903 adapter->total_tx_packets = 0;
905 /* auto mask will automatically re-enable the interrupt when we write
908 if (!igbvf_clean_tx_irq(tx_ring))
909 /* Ring was not completely cleaned, so fire another interrupt */
910 ew32(EICS, tx_ring->eims_value);
912 ew32(EIMS, tx_ring->eims_value);
917 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
919 struct net_device *netdev = data;
920 struct igbvf_adapter *adapter = netdev_priv(netdev);
922 adapter->int_counter0++;
924 /* Write the ITR value calculated at the end of the
925 * previous interrupt.
927 if (adapter->rx_ring->set_itr) {
928 writel(adapter->rx_ring->itr_val,
929 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
930 adapter->rx_ring->set_itr = 0;
933 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
934 adapter->total_rx_bytes = 0;
935 adapter->total_rx_packets = 0;
936 __napi_schedule(&adapter->rx_ring->napi);
942 #define IGBVF_NO_QUEUE -1
944 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
945 int tx_queue, int msix_vector)
947 struct e1000_hw *hw = &adapter->hw;
950 /* 82576 uses a table-based method for assigning vectors.
951 * Each queue has a single entry in the table to which we write
952 * a vector number along with a "valid" bit. Sadly, the layout
953 * of the table is somewhat counterintuitive.
955 if (rx_queue > IGBVF_NO_QUEUE) {
956 index = (rx_queue >> 1);
957 ivar = array_er32(IVAR0, index);
958 if (rx_queue & 0x1) {
959 /* vector goes into third byte of register */
960 ivar = ivar & 0xFF00FFFF;
961 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
963 /* vector goes into low byte of register */
964 ivar = ivar & 0xFFFFFF00;
965 ivar |= msix_vector | E1000_IVAR_VALID;
967 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
968 array_ew32(IVAR0, index, ivar);
970 if (tx_queue > IGBVF_NO_QUEUE) {
971 index = (tx_queue >> 1);
972 ivar = array_er32(IVAR0, index);
973 if (tx_queue & 0x1) {
974 /* vector goes into high byte of register */
975 ivar = ivar & 0x00FFFFFF;
976 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
978 /* vector goes into second byte of register */
979 ivar = ivar & 0xFFFF00FF;
980 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
982 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
983 array_ew32(IVAR0, index, ivar);
988 * igbvf_configure_msix - Configure MSI-X hardware
989 * @adapter: board private structure
991 * igbvf_configure_msix sets up the hardware to properly
992 * generate MSI-X interrupts.
994 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
997 struct e1000_hw *hw = &adapter->hw;
998 struct igbvf_ring *tx_ring = adapter->tx_ring;
999 struct igbvf_ring *rx_ring = adapter->rx_ring;
1002 adapter->eims_enable_mask = 0;
1004 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
1005 adapter->eims_enable_mask |= tx_ring->eims_value;
1006 writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register);
1007 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
1008 adapter->eims_enable_mask |= rx_ring->eims_value;
1009 writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register);
1011 /* set vector for other causes, i.e. link changes */
1013 tmp = (vector++ | E1000_IVAR_VALID);
1015 ew32(IVAR_MISC, tmp);
1017 adapter->eims_enable_mask = (1 << (vector)) - 1;
1018 adapter->eims_other = 1 << (vector - 1);
1022 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
1024 if (adapter->msix_entries) {
1025 pci_disable_msix(adapter->pdev);
1026 kfree(adapter->msix_entries);
1027 adapter->msix_entries = NULL;
1032 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1033 * @adapter: board private structure
1035 * Attempt to configure interrupts using the best available
1036 * capabilities of the hardware and kernel.
1038 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1043 /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */
1044 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1046 if (adapter->msix_entries) {
1047 for (i = 0; i < 3; i++)
1048 adapter->msix_entries[i].entry = i;
1050 err = pci_enable_msix_range(adapter->pdev,
1051 adapter->msix_entries, 3, 3);
1056 dev_err(&adapter->pdev->dev,
1057 "Failed to initialize MSI-X interrupts.\n");
1058 igbvf_reset_interrupt_capability(adapter);
1063 * igbvf_request_msix - Initialize MSI-X interrupts
1064 * @adapter: board private structure
1066 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1069 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1071 struct net_device *netdev = adapter->netdev;
1072 int err = 0, vector = 0;
1074 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1075 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1076 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1078 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1079 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1082 err = request_irq(adapter->msix_entries[vector].vector,
1083 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1088 adapter->tx_ring->itr_register = E1000_EITR(vector);
1089 adapter->tx_ring->itr_val = adapter->current_itr;
1092 err = request_irq(adapter->msix_entries[vector].vector,
1093 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1098 adapter->rx_ring->itr_register = E1000_EITR(vector);
1099 adapter->rx_ring->itr_val = adapter->current_itr;
1102 err = request_irq(adapter->msix_entries[vector].vector,
1103 igbvf_msix_other, 0, netdev->name, netdev);
1107 igbvf_configure_msix(adapter);
1114 * igbvf_alloc_queues - Allocate memory for all rings
1115 * @adapter: board private structure to initialize
1117 static int igbvf_alloc_queues(struct igbvf_adapter *adapter)
1119 struct net_device *netdev = adapter->netdev;
1121 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1122 if (!adapter->tx_ring)
1125 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1126 if (!adapter->rx_ring) {
1127 kfree(adapter->tx_ring);
1131 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1137 * igbvf_request_irq - initialize interrupts
1138 * @adapter: board private structure
1140 * Attempts to configure interrupts using the best available
1141 * capabilities of the hardware and kernel.
1143 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1147 /* igbvf supports msi-x only */
1148 if (adapter->msix_entries)
1149 err = igbvf_request_msix(adapter);
1154 dev_err(&adapter->pdev->dev,
1155 "Unable to allocate interrupt, Error: %d\n", err);
1160 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1162 struct net_device *netdev = adapter->netdev;
1165 if (adapter->msix_entries) {
1166 for (vector = 0; vector < 3; vector++)
1167 free_irq(adapter->msix_entries[vector].vector, netdev);
1172 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1173 * @adapter: board private structure
1175 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1177 struct e1000_hw *hw = &adapter->hw;
1181 if (adapter->msix_entries)
1186 * igbvf_irq_enable - Enable default interrupt generation settings
1187 * @adapter: board private structure
1189 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1191 struct e1000_hw *hw = &adapter->hw;
1193 ew32(EIAC, adapter->eims_enable_mask);
1194 ew32(EIAM, adapter->eims_enable_mask);
1195 ew32(EIMS, adapter->eims_enable_mask);
1199 * igbvf_poll - NAPI Rx polling callback
1200 * @napi: struct associated with this polling callback
1201 * @budget: amount of packets driver is allowed to process this poll
1203 static int igbvf_poll(struct napi_struct *napi, int budget)
1205 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1206 struct igbvf_adapter *adapter = rx_ring->adapter;
1207 struct e1000_hw *hw = &adapter->hw;
1210 igbvf_clean_rx_irq(adapter, &work_done, budget);
1212 /* If not enough Rx work done, exit the polling mode */
1213 if (work_done < budget) {
1214 napi_complete_done(napi, work_done);
1216 if (adapter->requested_itr & 3)
1217 igbvf_set_itr(adapter);
1219 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1220 ew32(EIMS, adapter->rx_ring->eims_value);
1227 * igbvf_set_rlpml - set receive large packet maximum length
1228 * @adapter: board private structure
1230 * Configure the maximum size of packets that will be received
1232 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1235 struct e1000_hw *hw = &adapter->hw;
1237 max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1238 e1000_rlpml_set_vf(hw, max_frame_size);
1241 static int igbvf_vlan_rx_add_vid(struct net_device *netdev,
1242 __be16 proto, u16 vid)
1244 struct igbvf_adapter *adapter = netdev_priv(netdev);
1245 struct e1000_hw *hw = &adapter->hw;
1247 if (hw->mac.ops.set_vfta(hw, vid, true)) {
1248 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1251 set_bit(vid, adapter->active_vlans);
1255 static int igbvf_vlan_rx_kill_vid(struct net_device *netdev,
1256 __be16 proto, u16 vid)
1258 struct igbvf_adapter *adapter = netdev_priv(netdev);
1259 struct e1000_hw *hw = &adapter->hw;
1261 if (hw->mac.ops.set_vfta(hw, vid, false)) {
1262 dev_err(&adapter->pdev->dev,
1263 "Failed to remove vlan id %d\n", vid);
1266 clear_bit(vid, adapter->active_vlans);
1270 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1274 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1275 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1279 * igbvf_configure_tx - Configure Transmit Unit after Reset
1280 * @adapter: board private structure
1282 * Configure the Tx unit of the MAC after a reset.
1284 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1286 struct e1000_hw *hw = &adapter->hw;
1287 struct igbvf_ring *tx_ring = adapter->tx_ring;
1289 u32 txdctl, dca_txctrl;
1291 /* disable transmits */
1292 txdctl = er32(TXDCTL(0));
1293 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1297 /* Setup the HW Tx Head and Tail descriptor pointers */
1298 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1299 tdba = tx_ring->dma;
1300 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1301 ew32(TDBAH(0), (tdba >> 32));
1304 tx_ring->head = E1000_TDH(0);
1305 tx_ring->tail = E1000_TDT(0);
1307 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1308 * MUST be delivered in order or it will completely screw up
1311 dca_txctrl = er32(DCA_TXCTRL(0));
1312 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1313 ew32(DCA_TXCTRL(0), dca_txctrl);
1315 /* enable transmits */
1316 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1317 ew32(TXDCTL(0), txdctl);
1319 /* Setup Transmit Descriptor Settings for eop descriptor */
1320 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1322 /* enable Report Status bit */
1323 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1327 * igbvf_setup_srrctl - configure the receive control registers
1328 * @adapter: Board private structure
1330 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1332 struct e1000_hw *hw = &adapter->hw;
1335 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1336 E1000_SRRCTL_BSIZEHDR_MASK |
1337 E1000_SRRCTL_BSIZEPKT_MASK);
1339 /* Enable queue drop to avoid head of line blocking */
1340 srrctl |= E1000_SRRCTL_DROP_EN;
1342 /* Setup buffer sizes */
1343 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1344 E1000_SRRCTL_BSIZEPKT_SHIFT;
1346 if (adapter->rx_buffer_len < 2048) {
1347 adapter->rx_ps_hdr_size = 0;
1348 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1350 adapter->rx_ps_hdr_size = 128;
1351 srrctl |= adapter->rx_ps_hdr_size <<
1352 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1353 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1356 ew32(SRRCTL(0), srrctl);
1360 * igbvf_configure_rx - Configure Receive Unit after Reset
1361 * @adapter: board private structure
1363 * Configure the Rx unit of the MAC after a reset.
1365 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1367 struct e1000_hw *hw = &adapter->hw;
1368 struct igbvf_ring *rx_ring = adapter->rx_ring;
1372 /* disable receives */
1373 rxdctl = er32(RXDCTL(0));
1374 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1378 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1380 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1381 * the Base and Length of the Rx Descriptor Ring
1383 rdba = rx_ring->dma;
1384 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1385 ew32(RDBAH(0), (rdba >> 32));
1386 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1387 rx_ring->head = E1000_RDH(0);
1388 rx_ring->tail = E1000_RDT(0);
1392 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1393 rxdctl &= 0xFFF00000;
1394 rxdctl |= IGBVF_RX_PTHRESH;
1395 rxdctl |= IGBVF_RX_HTHRESH << 8;
1396 rxdctl |= IGBVF_RX_WTHRESH << 16;
1398 igbvf_set_rlpml(adapter);
1400 /* enable receives */
1401 ew32(RXDCTL(0), rxdctl);
1405 * igbvf_set_multi - Multicast and Promiscuous mode set
1406 * @netdev: network interface device structure
1408 * The set_multi entry point is called whenever the multicast address
1409 * list or the network interface flags are updated. This routine is
1410 * responsible for configuring the hardware for proper multicast,
1411 * promiscuous mode, and all-multi behavior.
1413 static void igbvf_set_multi(struct net_device *netdev)
1415 struct igbvf_adapter *adapter = netdev_priv(netdev);
1416 struct e1000_hw *hw = &adapter->hw;
1417 struct netdev_hw_addr *ha;
1418 u8 *mta_list = NULL;
1421 if (!netdev_mc_empty(netdev)) {
1422 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN,
1428 /* prepare a packed array of only addresses. */
1430 netdev_for_each_mc_addr(ha, netdev)
1431 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1433 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1438 * igbvf_configure - configure the hardware for Rx and Tx
1439 * @adapter: private board structure
1441 static void igbvf_configure(struct igbvf_adapter *adapter)
1443 igbvf_set_multi(adapter->netdev);
1445 igbvf_restore_vlan(adapter);
1447 igbvf_configure_tx(adapter);
1448 igbvf_setup_srrctl(adapter);
1449 igbvf_configure_rx(adapter);
1450 igbvf_alloc_rx_buffers(adapter->rx_ring,
1451 igbvf_desc_unused(adapter->rx_ring));
1454 /* igbvf_reset - bring the hardware into a known good state
1455 * @adapter: private board structure
1457 * This function boots the hardware and enables some settings that
1458 * require a configuration cycle of the hardware - those cannot be
1459 * set/changed during runtime. After reset the device needs to be
1460 * properly configured for Rx, Tx etc.
1462 static void igbvf_reset(struct igbvf_adapter *adapter)
1464 struct e1000_mac_info *mac = &adapter->hw.mac;
1465 struct net_device *netdev = adapter->netdev;
1466 struct e1000_hw *hw = &adapter->hw;
1468 /* Allow time for pending master requests to run */
1469 if (mac->ops.reset_hw(hw))
1470 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1472 mac->ops.init_hw(hw);
1474 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1475 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1477 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1481 adapter->last_reset = jiffies;
1484 int igbvf_up(struct igbvf_adapter *adapter)
1486 struct e1000_hw *hw = &adapter->hw;
1488 /* hardware has been reset, we need to reload some things */
1489 igbvf_configure(adapter);
1491 clear_bit(__IGBVF_DOWN, &adapter->state);
1493 napi_enable(&adapter->rx_ring->napi);
1494 if (adapter->msix_entries)
1495 igbvf_configure_msix(adapter);
1497 /* Clear any pending interrupts. */
1499 igbvf_irq_enable(adapter);
1501 /* start the watchdog */
1502 hw->mac.get_link_status = 1;
1503 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1508 void igbvf_down(struct igbvf_adapter *adapter)
1510 struct net_device *netdev = adapter->netdev;
1511 struct e1000_hw *hw = &adapter->hw;
1514 /* signal that we're down so the interrupt handler does not
1515 * reschedule our watchdog timer
1517 set_bit(__IGBVF_DOWN, &adapter->state);
1519 /* disable receives in the hardware */
1520 rxdctl = er32(RXDCTL(0));
1521 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1523 netif_carrier_off(netdev);
1524 netif_stop_queue(netdev);
1526 /* disable transmits in the hardware */
1527 txdctl = er32(TXDCTL(0));
1528 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1530 /* flush both disables and wait for them to finish */
1534 napi_disable(&adapter->rx_ring->napi);
1536 igbvf_irq_disable(adapter);
1538 del_timer_sync(&adapter->watchdog_timer);
1540 /* record the stats before reset*/
1541 igbvf_update_stats(adapter);
1543 adapter->link_speed = 0;
1544 adapter->link_duplex = 0;
1546 igbvf_reset(adapter);
1547 igbvf_clean_tx_ring(adapter->tx_ring);
1548 igbvf_clean_rx_ring(adapter->rx_ring);
1551 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1554 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1555 usleep_range(1000, 2000);
1556 igbvf_down(adapter);
1558 clear_bit(__IGBVF_RESETTING, &adapter->state);
1562 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1563 * @adapter: board private structure to initialize
1565 * igbvf_sw_init initializes the Adapter private data structure.
1566 * Fields are initialized based on PCI device information and
1567 * OS network device settings (MTU size).
1569 static int igbvf_sw_init(struct igbvf_adapter *adapter)
1571 struct net_device *netdev = adapter->netdev;
1574 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1575 adapter->rx_ps_hdr_size = 0;
1576 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1577 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1579 adapter->tx_int_delay = 8;
1580 adapter->tx_abs_int_delay = 32;
1581 adapter->rx_int_delay = 0;
1582 adapter->rx_abs_int_delay = 8;
1583 adapter->requested_itr = 3;
1584 adapter->current_itr = IGBVF_START_ITR;
1586 /* Set various function pointers */
1587 adapter->ei->init_ops(&adapter->hw);
1589 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1593 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1597 igbvf_set_interrupt_capability(adapter);
1599 if (igbvf_alloc_queues(adapter))
1602 spin_lock_init(&adapter->tx_queue_lock);
1604 /* Explicitly disable IRQ since the NIC can be in any state. */
1605 igbvf_irq_disable(adapter);
1607 spin_lock_init(&adapter->stats_lock);
1609 set_bit(__IGBVF_DOWN, &adapter->state);
1613 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1615 struct e1000_hw *hw = &adapter->hw;
1617 adapter->stats.last_gprc = er32(VFGPRC);
1618 adapter->stats.last_gorc = er32(VFGORC);
1619 adapter->stats.last_gptc = er32(VFGPTC);
1620 adapter->stats.last_gotc = er32(VFGOTC);
1621 adapter->stats.last_mprc = er32(VFMPRC);
1622 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1623 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1624 adapter->stats.last_gorlbc = er32(VFGORLBC);
1625 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1627 adapter->stats.base_gprc = er32(VFGPRC);
1628 adapter->stats.base_gorc = er32(VFGORC);
1629 adapter->stats.base_gptc = er32(VFGPTC);
1630 adapter->stats.base_gotc = er32(VFGOTC);
1631 adapter->stats.base_mprc = er32(VFMPRC);
1632 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1633 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1634 adapter->stats.base_gorlbc = er32(VFGORLBC);
1635 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1639 * igbvf_open - Called when a network interface is made active
1640 * @netdev: network interface device structure
1642 * Returns 0 on success, negative value on failure
1644 * The open entry point is called when a network interface is made
1645 * active by the system (IFF_UP). At this point all resources needed
1646 * for transmit and receive operations are allocated, the interrupt
1647 * handler is registered with the OS, the watchdog timer is started,
1648 * and the stack is notified that the interface is ready.
1650 static int igbvf_open(struct net_device *netdev)
1652 struct igbvf_adapter *adapter = netdev_priv(netdev);
1653 struct e1000_hw *hw = &adapter->hw;
1656 /* disallow open during test */
1657 if (test_bit(__IGBVF_TESTING, &adapter->state))
1660 /* allocate transmit descriptors */
1661 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1665 /* allocate receive descriptors */
1666 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1670 /* before we allocate an interrupt, we must be ready to handle it.
1671 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1672 * as soon as we call pci_request_irq, so we have to setup our
1673 * clean_rx handler before we do so.
1675 igbvf_configure(adapter);
1677 err = igbvf_request_irq(adapter);
1681 /* From here on the code is the same as igbvf_up() */
1682 clear_bit(__IGBVF_DOWN, &adapter->state);
1684 napi_enable(&adapter->rx_ring->napi);
1686 /* clear any pending interrupts */
1689 igbvf_irq_enable(adapter);
1691 /* start the watchdog */
1692 hw->mac.get_link_status = 1;
1693 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1698 igbvf_free_rx_resources(adapter->rx_ring);
1700 igbvf_free_tx_resources(adapter->tx_ring);
1702 igbvf_reset(adapter);
1708 * igbvf_close - Disables a network interface
1709 * @netdev: network interface device structure
1711 * Returns 0, this is not allowed to fail
1713 * The close entry point is called when an interface is de-activated
1714 * by the OS. The hardware is still under the drivers control, but
1715 * needs to be disabled. A global MAC reset is issued to stop the
1716 * hardware, and all transmit and receive resources are freed.
1718 static int igbvf_close(struct net_device *netdev)
1720 struct igbvf_adapter *adapter = netdev_priv(netdev);
1722 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1723 igbvf_down(adapter);
1725 igbvf_free_irq(adapter);
1727 igbvf_free_tx_resources(adapter->tx_ring);
1728 igbvf_free_rx_resources(adapter->rx_ring);
1734 * igbvf_set_mac - Change the Ethernet Address of the NIC
1735 * @netdev: network interface device structure
1736 * @p: pointer to an address structure
1738 * Returns 0 on success, negative on failure
1740 static int igbvf_set_mac(struct net_device *netdev, void *p)
1742 struct igbvf_adapter *adapter = netdev_priv(netdev);
1743 struct e1000_hw *hw = &adapter->hw;
1744 struct sockaddr *addr = p;
1746 if (!is_valid_ether_addr(addr->sa_data))
1747 return -EADDRNOTAVAIL;
1749 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1751 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1753 if (!ether_addr_equal(addr->sa_data, hw->mac.addr))
1754 return -EADDRNOTAVAIL;
1756 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1761 #define UPDATE_VF_COUNTER(reg, name) \
1763 u32 current_counter = er32(reg); \
1764 if (current_counter < adapter->stats.last_##name) \
1765 adapter->stats.name += 0x100000000LL; \
1766 adapter->stats.last_##name = current_counter; \
1767 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1768 adapter->stats.name |= current_counter; \
1772 * igbvf_update_stats - Update the board statistics counters
1773 * @adapter: board private structure
1775 void igbvf_update_stats(struct igbvf_adapter *adapter)
1777 struct e1000_hw *hw = &adapter->hw;
1778 struct pci_dev *pdev = adapter->pdev;
1780 /* Prevent stats update while adapter is being reset, link is down
1781 * or if the pci connection is down.
1783 if (adapter->link_speed == 0)
1786 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1789 if (pci_channel_offline(pdev))
1792 UPDATE_VF_COUNTER(VFGPRC, gprc);
1793 UPDATE_VF_COUNTER(VFGORC, gorc);
1794 UPDATE_VF_COUNTER(VFGPTC, gptc);
1795 UPDATE_VF_COUNTER(VFGOTC, gotc);
1796 UPDATE_VF_COUNTER(VFMPRC, mprc);
1797 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1798 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1799 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1800 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1802 /* Fill out the OS statistics structure */
1803 adapter->net_stats.multicast = adapter->stats.mprc;
1806 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1808 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1809 adapter->link_speed,
1810 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1813 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1815 struct e1000_hw *hw = &adapter->hw;
1816 s32 ret_val = E1000_SUCCESS;
1819 /* If interface is down, stay link down */
1820 if (test_bit(__IGBVF_DOWN, &adapter->state))
1823 ret_val = hw->mac.ops.check_for_link(hw);
1824 link_active = !hw->mac.get_link_status;
1826 /* if check for link returns error we will need to reset */
1827 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1828 schedule_work(&adapter->reset_task);
1834 * igbvf_watchdog - Timer Call-back
1835 * @data: pointer to adapter cast into an unsigned long
1837 static void igbvf_watchdog(unsigned long data)
1839 struct igbvf_adapter *adapter = (struct igbvf_adapter *)data;
1841 /* Do the rest outside of interrupt context */
1842 schedule_work(&adapter->watchdog_task);
1845 static void igbvf_watchdog_task(struct work_struct *work)
1847 struct igbvf_adapter *adapter = container_of(work,
1848 struct igbvf_adapter,
1850 struct net_device *netdev = adapter->netdev;
1851 struct e1000_mac_info *mac = &adapter->hw.mac;
1852 struct igbvf_ring *tx_ring = adapter->tx_ring;
1853 struct e1000_hw *hw = &adapter->hw;
1857 link = igbvf_has_link(adapter);
1860 if (!netif_carrier_ok(netdev)) {
1861 mac->ops.get_link_up_info(&adapter->hw,
1862 &adapter->link_speed,
1863 &adapter->link_duplex);
1864 igbvf_print_link_info(adapter);
1866 netif_carrier_on(netdev);
1867 netif_wake_queue(netdev);
1870 if (netif_carrier_ok(netdev)) {
1871 adapter->link_speed = 0;
1872 adapter->link_duplex = 0;
1873 dev_info(&adapter->pdev->dev, "Link is Down\n");
1874 netif_carrier_off(netdev);
1875 netif_stop_queue(netdev);
1879 if (netif_carrier_ok(netdev)) {
1880 igbvf_update_stats(adapter);
1882 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1885 /* We've lost link, so the controller stops DMA,
1886 * but we've got queued Tx work that's never going
1887 * to get done, so reset controller to flush Tx.
1888 * (Do the reset outside of interrupt context).
1890 adapter->tx_timeout_count++;
1891 schedule_work(&adapter->reset_task);
1895 /* Cause software interrupt to ensure Rx ring is cleaned */
1896 ew32(EICS, adapter->rx_ring->eims_value);
1898 /* Reset the timer */
1899 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1900 mod_timer(&adapter->watchdog_timer,
1901 round_jiffies(jiffies + (2 * HZ)));
1904 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1905 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1906 #define IGBVF_TX_FLAGS_TSO 0x00000004
1907 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1908 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1909 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1911 static int igbvf_tso(struct igbvf_adapter *adapter,
1912 struct igbvf_ring *tx_ring,
1913 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len,
1916 struct e1000_adv_tx_context_desc *context_desc;
1917 struct igbvf_buffer *buffer_info;
1918 u32 info = 0, tu_cmd = 0;
1919 u32 mss_l4len_idx, l4len;
1925 err = skb_cow_head(skb, 0);
1927 dev_err(&adapter->pdev->dev, "igbvf_tso returning an error\n");
1931 l4len = tcp_hdrlen(skb);
1934 if (protocol == htons(ETH_P_IP)) {
1935 struct iphdr *iph = ip_hdr(skb);
1939 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1943 } else if (skb_is_gso_v6(skb)) {
1944 ipv6_hdr(skb)->payload_len = 0;
1945 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1946 &ipv6_hdr(skb)->daddr,
1950 i = tx_ring->next_to_use;
1952 buffer_info = &tx_ring->buffer_info[i];
1953 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1954 /* VLAN MACLEN IPLEN */
1955 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1956 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1957 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1958 *hdr_len += skb_network_offset(skb);
1959 info |= (skb_transport_header(skb) - skb_network_header(skb));
1960 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1961 context_desc->vlan_macip_lens = cpu_to_le32(info);
1963 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1964 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1966 if (protocol == htons(ETH_P_IP))
1967 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1968 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1970 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1973 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1974 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1976 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1977 context_desc->seqnum_seed = 0;
1979 buffer_info->time_stamp = jiffies;
1980 buffer_info->dma = 0;
1982 if (i == tx_ring->count)
1985 tx_ring->next_to_use = i;
1990 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
1991 struct igbvf_ring *tx_ring,
1992 struct sk_buff *skb, u32 tx_flags,
1995 struct e1000_adv_tx_context_desc *context_desc;
1997 struct igbvf_buffer *buffer_info;
1998 u32 info = 0, tu_cmd = 0;
2000 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
2001 (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
2002 i = tx_ring->next_to_use;
2003 buffer_info = &tx_ring->buffer_info[i];
2004 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
2006 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2007 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
2009 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2010 if (skb->ip_summed == CHECKSUM_PARTIAL)
2011 info |= (skb_transport_header(skb) -
2012 skb_network_header(skb));
2014 context_desc->vlan_macip_lens = cpu_to_le32(info);
2016 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2018 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2020 case htons(ETH_P_IP):
2021 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
2022 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2023 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2025 case htons(ETH_P_IPV6):
2026 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2027 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2034 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2035 context_desc->seqnum_seed = 0;
2036 context_desc->mss_l4len_idx = 0;
2038 buffer_info->time_stamp = jiffies;
2039 buffer_info->dma = 0;
2041 if (i == tx_ring->count)
2043 tx_ring->next_to_use = i;
2051 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2053 struct igbvf_adapter *adapter = netdev_priv(netdev);
2055 /* there is enough descriptors then we don't need to worry */
2056 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2059 netif_stop_queue(netdev);
2061 /* Herbert's original patch had:
2062 * smp_mb__after_netif_stop_queue();
2063 * but since that doesn't exist yet, just open code it.
2067 /* We need to check again just in case room has been made available */
2068 if (igbvf_desc_unused(adapter->tx_ring) < size)
2071 netif_wake_queue(netdev);
2073 ++adapter->restart_queue;
2077 #define IGBVF_MAX_TXD_PWR 16
2078 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2080 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2081 struct igbvf_ring *tx_ring,
2082 struct sk_buff *skb)
2084 struct igbvf_buffer *buffer_info;
2085 struct pci_dev *pdev = adapter->pdev;
2086 unsigned int len = skb_headlen(skb);
2087 unsigned int count = 0, i;
2090 i = tx_ring->next_to_use;
2092 buffer_info = &tx_ring->buffer_info[i];
2093 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2094 buffer_info->length = len;
2095 /* set time_stamp *before* dma to help avoid a possible race */
2096 buffer_info->time_stamp = jiffies;
2097 buffer_info->mapped_as_page = false;
2098 buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2100 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2103 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2104 const struct skb_frag_struct *frag;
2108 if (i == tx_ring->count)
2111 frag = &skb_shinfo(skb)->frags[f];
2112 len = skb_frag_size(frag);
2114 buffer_info = &tx_ring->buffer_info[i];
2115 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2116 buffer_info->length = len;
2117 buffer_info->time_stamp = jiffies;
2118 buffer_info->mapped_as_page = true;
2119 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2121 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2125 tx_ring->buffer_info[i].skb = skb;
2130 dev_err(&pdev->dev, "TX DMA map failed\n");
2132 /* clear timestamp and dma mappings for failed buffer_info mapping */
2133 buffer_info->dma = 0;
2134 buffer_info->time_stamp = 0;
2135 buffer_info->length = 0;
2136 buffer_info->mapped_as_page = false;
2140 /* clear timestamp and dma mappings for remaining portion of packet */
2143 i += tx_ring->count;
2145 buffer_info = &tx_ring->buffer_info[i];
2146 igbvf_put_txbuf(adapter, buffer_info);
2152 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2153 struct igbvf_ring *tx_ring,
2154 int tx_flags, int count,
2155 unsigned int first, u32 paylen,
2158 union e1000_adv_tx_desc *tx_desc = NULL;
2159 struct igbvf_buffer *buffer_info;
2160 u32 olinfo_status = 0, cmd_type_len;
2163 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2164 E1000_ADVTXD_DCMD_DEXT);
2166 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2167 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2169 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2170 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2172 /* insert tcp checksum */
2173 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2175 /* insert ip checksum */
2176 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2177 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2179 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2180 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2183 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2185 i = tx_ring->next_to_use;
2187 buffer_info = &tx_ring->buffer_info[i];
2188 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2189 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2190 tx_desc->read.cmd_type_len =
2191 cpu_to_le32(cmd_type_len | buffer_info->length);
2192 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2194 if (i == tx_ring->count)
2198 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2199 /* Force memory writes to complete before letting h/w
2200 * know there are new descriptors to fetch. (Only
2201 * applicable for weak-ordered memory model archs,
2206 tx_ring->buffer_info[first].next_to_watch = tx_desc;
2207 tx_ring->next_to_use = i;
2208 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2209 /* we need this if more than one processor can write to our tail
2210 * at a time, it synchronizes IO on IA64/Altix systems
2215 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2216 struct net_device *netdev,
2217 struct igbvf_ring *tx_ring)
2219 struct igbvf_adapter *adapter = netdev_priv(netdev);
2220 unsigned int first, tx_flags = 0;
2224 __be16 protocol = vlan_get_protocol(skb);
2226 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2227 dev_kfree_skb_any(skb);
2228 return NETDEV_TX_OK;
2231 if (skb->len <= 0) {
2232 dev_kfree_skb_any(skb);
2233 return NETDEV_TX_OK;
2236 /* need: count + 4 desc gap to keep tail from touching
2237 * + 2 desc gap to keep tail from touching head,
2238 * + 1 desc for skb->data,
2239 * + 1 desc for context descriptor,
2240 * head, otherwise try next time
2242 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2243 /* this is a hard error */
2244 return NETDEV_TX_BUSY;
2247 if (skb_vlan_tag_present(skb)) {
2248 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2249 tx_flags |= (skb_vlan_tag_get(skb) <<
2250 IGBVF_TX_FLAGS_VLAN_SHIFT);
2253 if (protocol == htons(ETH_P_IP))
2254 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2256 first = tx_ring->next_to_use;
2258 tso = skb_is_gso(skb) ?
2259 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len, protocol) : 0;
2260 if (unlikely(tso < 0)) {
2261 dev_kfree_skb_any(skb);
2262 return NETDEV_TX_OK;
2266 tx_flags |= IGBVF_TX_FLAGS_TSO;
2267 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags, protocol) &&
2268 (skb->ip_summed == CHECKSUM_PARTIAL))
2269 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2271 /* count reflects descriptors mapped, if 0 then mapping error
2272 * has occurred and we need to rewind the descriptor queue
2274 count = igbvf_tx_map_adv(adapter, tx_ring, skb);
2277 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2278 first, skb->len, hdr_len);
2279 /* Make sure there is space in the ring for the next send. */
2280 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2282 dev_kfree_skb_any(skb);
2283 tx_ring->buffer_info[first].time_stamp = 0;
2284 tx_ring->next_to_use = first;
2287 return NETDEV_TX_OK;
2290 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2291 struct net_device *netdev)
2293 struct igbvf_adapter *adapter = netdev_priv(netdev);
2294 struct igbvf_ring *tx_ring;
2296 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2297 dev_kfree_skb_any(skb);
2298 return NETDEV_TX_OK;
2301 tx_ring = &adapter->tx_ring[0];
2303 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2307 * igbvf_tx_timeout - Respond to a Tx Hang
2308 * @netdev: network interface device structure
2310 static void igbvf_tx_timeout(struct net_device *netdev)
2312 struct igbvf_adapter *adapter = netdev_priv(netdev);
2314 /* Do the reset outside of interrupt context */
2315 adapter->tx_timeout_count++;
2316 schedule_work(&adapter->reset_task);
2319 static void igbvf_reset_task(struct work_struct *work)
2321 struct igbvf_adapter *adapter;
2323 adapter = container_of(work, struct igbvf_adapter, reset_task);
2325 igbvf_reinit_locked(adapter);
2329 * igbvf_get_stats - Get System Network Statistics
2330 * @netdev: network interface device structure
2332 * Returns the address of the device statistics structure.
2333 * The statistics are actually updated from the timer callback.
2335 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2337 struct igbvf_adapter *adapter = netdev_priv(netdev);
2339 /* only return the current stats */
2340 return &adapter->net_stats;
2344 * igbvf_change_mtu - Change the Maximum Transfer Unit
2345 * @netdev: network interface device structure
2346 * @new_mtu: new value for maximum frame size
2348 * Returns 0 on success, negative on failure
2350 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2352 struct igbvf_adapter *adapter = netdev_priv(netdev);
2353 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2355 if (new_mtu < 68 || new_mtu > INT_MAX - ETH_HLEN - ETH_FCS_LEN ||
2356 max_frame > MAX_JUMBO_FRAME_SIZE)
2359 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2360 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2361 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2365 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2366 usleep_range(1000, 2000);
2367 /* igbvf_down has a dependency on max_frame_size */
2368 adapter->max_frame_size = max_frame;
2369 if (netif_running(netdev))
2370 igbvf_down(adapter);
2372 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2373 * means we reserve 2 more, this pushes us to allocate from the next
2375 * i.e. RXBUFFER_2048 --> size-4096 slab
2376 * However with the new *_jumbo_rx* routines, jumbo receives will use
2380 if (max_frame <= 1024)
2381 adapter->rx_buffer_len = 1024;
2382 else if (max_frame <= 2048)
2383 adapter->rx_buffer_len = 2048;
2385 #if (PAGE_SIZE / 2) > 16384
2386 adapter->rx_buffer_len = 16384;
2388 adapter->rx_buffer_len = PAGE_SIZE / 2;
2391 /* adjust allocation if LPE protects us, and we aren't using SBP */
2392 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2393 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2394 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2397 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2398 netdev->mtu, new_mtu);
2399 netdev->mtu = new_mtu;
2401 if (netif_running(netdev))
2404 igbvf_reset(adapter);
2406 clear_bit(__IGBVF_RESETTING, &adapter->state);
2411 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2419 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2421 struct net_device *netdev = pci_get_drvdata(pdev);
2422 struct igbvf_adapter *adapter = netdev_priv(netdev);
2427 netif_device_detach(netdev);
2429 if (netif_running(netdev)) {
2430 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2431 igbvf_down(adapter);
2432 igbvf_free_irq(adapter);
2436 retval = pci_save_state(pdev);
2441 pci_disable_device(pdev);
2447 static int igbvf_resume(struct pci_dev *pdev)
2449 struct net_device *netdev = pci_get_drvdata(pdev);
2450 struct igbvf_adapter *adapter = netdev_priv(netdev);
2453 pci_restore_state(pdev);
2454 err = pci_enable_device_mem(pdev);
2456 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2460 pci_set_master(pdev);
2462 if (netif_running(netdev)) {
2463 err = igbvf_request_irq(adapter);
2468 igbvf_reset(adapter);
2470 if (netif_running(netdev))
2473 netif_device_attach(netdev);
2479 static void igbvf_shutdown(struct pci_dev *pdev)
2481 igbvf_suspend(pdev, PMSG_SUSPEND);
2484 #ifdef CONFIG_NET_POLL_CONTROLLER
2485 /* Polling 'interrupt' - used by things like netconsole to send skbs
2486 * without having to re-enable interrupts. It's not called while
2487 * the interrupt routine is executing.
2489 static void igbvf_netpoll(struct net_device *netdev)
2491 struct igbvf_adapter *adapter = netdev_priv(netdev);
2493 disable_irq(adapter->pdev->irq);
2495 igbvf_clean_tx_irq(adapter->tx_ring);
2497 enable_irq(adapter->pdev->irq);
2502 * igbvf_io_error_detected - called when PCI error is detected
2503 * @pdev: Pointer to PCI device
2504 * @state: The current pci connection state
2506 * This function is called after a PCI bus error affecting
2507 * this device has been detected.
2509 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2510 pci_channel_state_t state)
2512 struct net_device *netdev = pci_get_drvdata(pdev);
2513 struct igbvf_adapter *adapter = netdev_priv(netdev);
2515 netif_device_detach(netdev);
2517 if (state == pci_channel_io_perm_failure)
2518 return PCI_ERS_RESULT_DISCONNECT;
2520 if (netif_running(netdev))
2521 igbvf_down(adapter);
2522 pci_disable_device(pdev);
2524 /* Request a slot slot reset. */
2525 return PCI_ERS_RESULT_NEED_RESET;
2529 * igbvf_io_slot_reset - called after the pci bus has been reset.
2530 * @pdev: Pointer to PCI device
2532 * Restart the card from scratch, as if from a cold-boot. Implementation
2533 * resembles the first-half of the igbvf_resume routine.
2535 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2537 struct net_device *netdev = pci_get_drvdata(pdev);
2538 struct igbvf_adapter *adapter = netdev_priv(netdev);
2540 if (pci_enable_device_mem(pdev)) {
2542 "Cannot re-enable PCI device after reset.\n");
2543 return PCI_ERS_RESULT_DISCONNECT;
2545 pci_set_master(pdev);
2547 igbvf_reset(adapter);
2549 return PCI_ERS_RESULT_RECOVERED;
2553 * igbvf_io_resume - called when traffic can start flowing again.
2554 * @pdev: Pointer to PCI device
2556 * This callback is called when the error recovery driver tells us that
2557 * its OK to resume normal operation. Implementation resembles the
2558 * second-half of the igbvf_resume routine.
2560 static void igbvf_io_resume(struct pci_dev *pdev)
2562 struct net_device *netdev = pci_get_drvdata(pdev);
2563 struct igbvf_adapter *adapter = netdev_priv(netdev);
2565 if (netif_running(netdev)) {
2566 if (igbvf_up(adapter)) {
2568 "can't bring device back up after reset\n");
2573 netif_device_attach(netdev);
2576 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2578 struct e1000_hw *hw = &adapter->hw;
2579 struct net_device *netdev = adapter->netdev;
2580 struct pci_dev *pdev = adapter->pdev;
2582 if (hw->mac.type == e1000_vfadapt_i350)
2583 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2585 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2586 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2589 static int igbvf_set_features(struct net_device *netdev,
2590 netdev_features_t features)
2592 struct igbvf_adapter *adapter = netdev_priv(netdev);
2594 if (features & NETIF_F_RXCSUM)
2595 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2597 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2602 static const struct net_device_ops igbvf_netdev_ops = {
2603 .ndo_open = igbvf_open,
2604 .ndo_stop = igbvf_close,
2605 .ndo_start_xmit = igbvf_xmit_frame,
2606 .ndo_get_stats = igbvf_get_stats,
2607 .ndo_set_rx_mode = igbvf_set_multi,
2608 .ndo_set_mac_address = igbvf_set_mac,
2609 .ndo_change_mtu = igbvf_change_mtu,
2610 .ndo_do_ioctl = igbvf_ioctl,
2611 .ndo_tx_timeout = igbvf_tx_timeout,
2612 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2613 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2614 #ifdef CONFIG_NET_POLL_CONTROLLER
2615 .ndo_poll_controller = igbvf_netpoll,
2617 .ndo_set_features = igbvf_set_features,
2618 .ndo_features_check = passthru_features_check,
2622 * igbvf_probe - Device Initialization Routine
2623 * @pdev: PCI device information struct
2624 * @ent: entry in igbvf_pci_tbl
2626 * Returns 0 on success, negative on failure
2628 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2629 * The OS initialization, configuring of the adapter private structure,
2630 * and a hardware reset occur.
2632 static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2634 struct net_device *netdev;
2635 struct igbvf_adapter *adapter;
2636 struct e1000_hw *hw;
2637 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2639 static int cards_found;
2640 int err, pci_using_dac;
2642 err = pci_enable_device_mem(pdev);
2647 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2651 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2654 "No usable DMA configuration, aborting\n");
2659 err = pci_request_regions(pdev, igbvf_driver_name);
2663 pci_set_master(pdev);
2666 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2668 goto err_alloc_etherdev;
2670 SET_NETDEV_DEV(netdev, &pdev->dev);
2672 pci_set_drvdata(pdev, netdev);
2673 adapter = netdev_priv(netdev);
2675 adapter->netdev = netdev;
2676 adapter->pdev = pdev;
2678 adapter->pba = ei->pba;
2679 adapter->flags = ei->flags;
2680 adapter->hw.back = adapter;
2681 adapter->hw.mac.type = ei->mac;
2682 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2684 /* PCI config space info */
2686 hw->vendor_id = pdev->vendor;
2687 hw->device_id = pdev->device;
2688 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2689 hw->subsystem_device_id = pdev->subsystem_device;
2690 hw->revision_id = pdev->revision;
2693 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2694 pci_resource_len(pdev, 0));
2696 if (!adapter->hw.hw_addr)
2699 if (ei->get_variants) {
2700 err = ei->get_variants(adapter);
2702 goto err_get_variants;
2705 /* setup adapter struct */
2706 err = igbvf_sw_init(adapter);
2710 /* construct the net_device struct */
2711 netdev->netdev_ops = &igbvf_netdev_ops;
2713 igbvf_set_ethtool_ops(netdev);
2714 netdev->watchdog_timeo = 5 * HZ;
2715 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2717 adapter->bd_number = cards_found++;
2719 netdev->hw_features = NETIF_F_SG |
2726 netdev->features = netdev->hw_features |
2727 NETIF_F_HW_VLAN_CTAG_TX |
2728 NETIF_F_HW_VLAN_CTAG_RX |
2729 NETIF_F_HW_VLAN_CTAG_FILTER;
2732 netdev->features |= NETIF_F_HIGHDMA;
2734 netdev->vlan_features |= NETIF_F_TSO;
2735 netdev->vlan_features |= NETIF_F_TSO6;
2736 netdev->vlan_features |= NETIF_F_IP_CSUM;
2737 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2738 netdev->vlan_features |= NETIF_F_SG;
2740 /*reset the controller to put the device in a known good state */
2741 err = hw->mac.ops.reset_hw(hw);
2743 dev_info(&pdev->dev,
2744 "PF still in reset state. Is the PF interface up?\n");
2746 err = hw->mac.ops.read_mac_addr(hw);
2748 dev_info(&pdev->dev, "Error reading MAC address.\n");
2749 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2750 dev_info(&pdev->dev,
2751 "MAC address not assigned by administrator.\n");
2752 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2756 if (!is_valid_ether_addr(netdev->dev_addr)) {
2757 dev_info(&pdev->dev, "Assigning random MAC address.\n");
2758 eth_hw_addr_random(netdev);
2759 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2763 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2764 (unsigned long)adapter);
2766 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2767 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2769 /* ring size defaults */
2770 adapter->rx_ring->count = 1024;
2771 adapter->tx_ring->count = 1024;
2773 /* reset the hardware with the new settings */
2774 igbvf_reset(adapter);
2776 /* set hardware-specific flags */
2777 if (adapter->hw.mac.type == e1000_vfadapt_i350)
2778 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP;
2780 strcpy(netdev->name, "eth%d");
2781 err = register_netdev(netdev);
2785 /* tell the stack to leave us alone until igbvf_open() is called */
2786 netif_carrier_off(netdev);
2787 netif_stop_queue(netdev);
2789 igbvf_print_device_info(adapter);
2791 igbvf_initialize_last_counter_stats(adapter);
2796 kfree(adapter->tx_ring);
2797 kfree(adapter->rx_ring);
2799 igbvf_reset_interrupt_capability(adapter);
2801 iounmap(adapter->hw.hw_addr);
2803 free_netdev(netdev);
2805 pci_release_regions(pdev);
2808 pci_disable_device(pdev);
2813 * igbvf_remove - Device Removal Routine
2814 * @pdev: PCI device information struct
2816 * igbvf_remove is called by the PCI subsystem to alert the driver
2817 * that it should release a PCI device. The could be caused by a
2818 * Hot-Plug event, or because the driver is going to be removed from
2821 static void igbvf_remove(struct pci_dev *pdev)
2823 struct net_device *netdev = pci_get_drvdata(pdev);
2824 struct igbvf_adapter *adapter = netdev_priv(netdev);
2825 struct e1000_hw *hw = &adapter->hw;
2827 /* The watchdog timer may be rescheduled, so explicitly
2828 * disable it from being rescheduled.
2830 set_bit(__IGBVF_DOWN, &adapter->state);
2831 del_timer_sync(&adapter->watchdog_timer);
2833 cancel_work_sync(&adapter->reset_task);
2834 cancel_work_sync(&adapter->watchdog_task);
2836 unregister_netdev(netdev);
2838 igbvf_reset_interrupt_capability(adapter);
2840 /* it is important to delete the NAPI struct prior to freeing the
2841 * Rx ring so that you do not end up with null pointer refs
2843 netif_napi_del(&adapter->rx_ring->napi);
2844 kfree(adapter->tx_ring);
2845 kfree(adapter->rx_ring);
2847 iounmap(hw->hw_addr);
2848 if (hw->flash_address)
2849 iounmap(hw->flash_address);
2850 pci_release_regions(pdev);
2852 free_netdev(netdev);
2854 pci_disable_device(pdev);
2857 /* PCI Error Recovery (ERS) */
2858 static const struct pci_error_handlers igbvf_err_handler = {
2859 .error_detected = igbvf_io_error_detected,
2860 .slot_reset = igbvf_io_slot_reset,
2861 .resume = igbvf_io_resume,
2864 static const struct pci_device_id igbvf_pci_tbl[] = {
2865 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2866 { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2867 { } /* terminate list */
2869 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2871 /* PCI Device API Driver */
2872 static struct pci_driver igbvf_driver = {
2873 .name = igbvf_driver_name,
2874 .id_table = igbvf_pci_tbl,
2875 .probe = igbvf_probe,
2876 .remove = igbvf_remove,
2878 /* Power Management Hooks */
2879 .suspend = igbvf_suspend,
2880 .resume = igbvf_resume,
2882 .shutdown = igbvf_shutdown,
2883 .err_handler = &igbvf_err_handler
2887 * igbvf_init_module - Driver Registration Routine
2889 * igbvf_init_module is the first routine called when the driver is
2890 * loaded. All it does is register with the PCI subsystem.
2892 static int __init igbvf_init_module(void)
2896 pr_info("%s - version %s\n", igbvf_driver_string, igbvf_driver_version);
2897 pr_info("%s\n", igbvf_copyright);
2899 ret = pci_register_driver(&igbvf_driver);
2903 module_init(igbvf_init_module);
2906 * igbvf_exit_module - Driver Exit Cleanup Routine
2908 * igbvf_exit_module is called just before the driver is removed
2911 static void __exit igbvf_exit_module(void)
2913 pci_unregister_driver(&igbvf_driver);
2915 module_exit(igbvf_exit_module);
2917 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2918 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
2919 MODULE_LICENSE("GPL");
2920 MODULE_VERSION(DRV_VERSION);