1 /*******************************************************************************
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/init.h>
31 #include <linux/pci.h>
32 #include <linux/vmalloc.h>
33 #include <linux/pagemap.h>
34 #include <linux/delay.h>
35 #include <linux/netdevice.h>
36 #include <linux/tcp.h>
37 #include <linux/ipv6.h>
38 #include <net/checksum.h>
39 #include <net/ip6_checksum.h>
40 #include <linux/mii.h>
41 #include <linux/ethtool.h>
42 #include <linux/if_vlan.h>
43 #include <linux/pm_qos_params.h>
47 #define DRV_VERSION "1.0.0-k0"
48 char igbvf_driver_name[] = "igbvf";
49 const char igbvf_driver_version[] = DRV_VERSION;
50 static const char igbvf_driver_string[] =
51 "Intel(R) Virtual Function Network Driver";
52 static const char igbvf_copyright[] = "Copyright (c) 2009 Intel Corporation.";
54 static int igbvf_poll(struct napi_struct *napi, int budget);
55 static void igbvf_reset(struct igbvf_adapter *);
56 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
57 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
59 static struct igbvf_info igbvf_vf_info = {
63 .init_ops = e1000_init_function_pointers_vf,
66 static const struct igbvf_info *igbvf_info_tbl[] = {
67 [board_vf] = &igbvf_vf_info,
71 * igbvf_desc_unused - calculate if we have unused descriptors
73 static int igbvf_desc_unused(struct igbvf_ring *ring)
75 if (ring->next_to_clean > ring->next_to_use)
76 return ring->next_to_clean - ring->next_to_use - 1;
78 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
82 * igbvf_receive_skb - helper function to handle Rx indications
83 * @adapter: board private structure
84 * @status: descriptor status field as written by hardware
85 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
86 * @skb: pointer to sk_buff to be indicated to stack
88 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
89 struct net_device *netdev,
93 if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
94 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
96 E1000_RXD_SPC_VLAN_MASK);
98 netif_receive_skb(skb);
101 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
102 u32 status_err, struct sk_buff *skb)
104 skb->ip_summed = CHECKSUM_NONE;
106 /* Ignore Checksum bit is set or checksum is disabled through ethtool */
107 if ((status_err & E1000_RXD_STAT_IXSM) ||
108 (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
111 /* TCP/UDP checksum error bit is set */
113 (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
114 /* let the stack verify checksum errors */
115 adapter->hw_csum_err++;
119 /* It must be a TCP or UDP packet with a valid checksum */
120 if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
121 skb->ip_summed = CHECKSUM_UNNECESSARY;
123 adapter->hw_csum_good++;
127 * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
128 * @rx_ring: address of ring structure to repopulate
129 * @cleaned_count: number of buffers to repopulate
131 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
134 struct igbvf_adapter *adapter = rx_ring->adapter;
135 struct net_device *netdev = adapter->netdev;
136 struct pci_dev *pdev = adapter->pdev;
137 union e1000_adv_rx_desc *rx_desc;
138 struct igbvf_buffer *buffer_info;
143 i = rx_ring->next_to_use;
144 buffer_info = &rx_ring->buffer_info[i];
146 if (adapter->rx_ps_hdr_size)
147 bufsz = adapter->rx_ps_hdr_size;
149 bufsz = adapter->rx_buffer_len;
151 while (cleaned_count--) {
152 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
154 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
155 if (!buffer_info->page) {
156 buffer_info->page = alloc_page(GFP_ATOMIC);
157 if (!buffer_info->page) {
158 adapter->alloc_rx_buff_failed++;
161 buffer_info->page_offset = 0;
163 buffer_info->page_offset ^= PAGE_SIZE / 2;
165 buffer_info->page_dma =
166 pci_map_page(pdev, buffer_info->page,
167 buffer_info->page_offset,
172 if (!buffer_info->skb) {
173 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
175 adapter->alloc_rx_buff_failed++;
179 buffer_info->skb = skb;
180 buffer_info->dma = pci_map_single(pdev, skb->data,
184 /* Refresh the desc even if buffer_addrs didn't change because
185 * each write-back erases this info. */
186 if (adapter->rx_ps_hdr_size) {
187 rx_desc->read.pkt_addr =
188 cpu_to_le64(buffer_info->page_dma);
189 rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
191 rx_desc->read.pkt_addr =
192 cpu_to_le64(buffer_info->dma);
193 rx_desc->read.hdr_addr = 0;
197 if (i == rx_ring->count)
199 buffer_info = &rx_ring->buffer_info[i];
203 if (rx_ring->next_to_use != i) {
204 rx_ring->next_to_use = i;
206 i = (rx_ring->count - 1);
210 /* Force memory writes to complete before letting h/w
211 * know there are new descriptors to fetch. (Only
212 * applicable for weak-ordered memory model archs,
215 writel(i, adapter->hw.hw_addr + rx_ring->tail);
220 * igbvf_clean_rx_irq - Send received data up the network stack; legacy
221 * @adapter: board private structure
223 * the return value indicates whether actual cleaning was done, there
224 * is no guarantee that everything was cleaned
226 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
227 int *work_done, int work_to_do)
229 struct igbvf_ring *rx_ring = adapter->rx_ring;
230 struct net_device *netdev = adapter->netdev;
231 struct pci_dev *pdev = adapter->pdev;
232 union e1000_adv_rx_desc *rx_desc, *next_rxd;
233 struct igbvf_buffer *buffer_info, *next_buffer;
235 bool cleaned = false;
236 int cleaned_count = 0;
237 unsigned int total_bytes = 0, total_packets = 0;
239 u32 length, hlen, staterr;
241 i = rx_ring->next_to_clean;
242 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
243 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
245 while (staterr & E1000_RXD_STAT_DD) {
246 if (*work_done >= work_to_do)
250 buffer_info = &rx_ring->buffer_info[i];
252 /* HW will not DMA in data larger than the given buffer, even
253 * if it parses the (NFS, of course) header to be larger. In
254 * that case, it fills the header buffer and spills the rest
257 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
258 E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
259 if (hlen > adapter->rx_ps_hdr_size)
260 hlen = adapter->rx_ps_hdr_size;
262 length = le16_to_cpu(rx_desc->wb.upper.length);
266 skb = buffer_info->skb;
267 prefetch(skb->data - NET_IP_ALIGN);
268 buffer_info->skb = NULL;
269 if (!adapter->rx_ps_hdr_size) {
270 pci_unmap_single(pdev, buffer_info->dma,
271 adapter->rx_buffer_len,
273 buffer_info->dma = 0;
274 skb_put(skb, length);
278 if (!skb_shinfo(skb)->nr_frags) {
279 pci_unmap_single(pdev, buffer_info->dma,
280 adapter->rx_ps_hdr_size,
286 pci_unmap_page(pdev, buffer_info->page_dma,
289 buffer_info->page_dma = 0;
291 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++,
293 buffer_info->page_offset,
296 if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
297 (page_count(buffer_info->page) != 1))
298 buffer_info->page = NULL;
300 get_page(buffer_info->page);
303 skb->data_len += length;
304 skb->truesize += length;
308 if (i == rx_ring->count)
310 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
312 next_buffer = &rx_ring->buffer_info[i];
314 if (!(staterr & E1000_RXD_STAT_EOP)) {
315 buffer_info->skb = next_buffer->skb;
316 buffer_info->dma = next_buffer->dma;
317 next_buffer->skb = skb;
318 next_buffer->dma = 0;
322 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
323 dev_kfree_skb_irq(skb);
327 total_bytes += skb->len;
330 igbvf_rx_checksum_adv(adapter, staterr, skb);
332 skb->protocol = eth_type_trans(skb, netdev);
334 igbvf_receive_skb(adapter, netdev, skb, staterr,
335 rx_desc->wb.upper.vlan);
338 rx_desc->wb.upper.status_error = 0;
340 /* return some buffers to hardware, one at a time is too slow */
341 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
342 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
346 /* use prefetched values */
348 buffer_info = next_buffer;
350 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
353 rx_ring->next_to_clean = i;
354 cleaned_count = igbvf_desc_unused(rx_ring);
357 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
359 adapter->total_rx_packets += total_packets;
360 adapter->total_rx_bytes += total_bytes;
361 adapter->net_stats.rx_bytes += total_bytes;
362 adapter->net_stats.rx_packets += total_packets;
366 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
367 struct igbvf_buffer *buffer_info)
369 if (buffer_info->dma) {
370 if (buffer_info->mapped_as_page)
371 pci_unmap_page(adapter->pdev,
376 pci_unmap_single(adapter->pdev,
380 buffer_info->dma = 0;
382 if (buffer_info->skb) {
383 dev_kfree_skb_any(buffer_info->skb);
384 buffer_info->skb = NULL;
386 buffer_info->time_stamp = 0;
389 static void igbvf_print_tx_hang(struct igbvf_adapter *adapter)
391 struct igbvf_ring *tx_ring = adapter->tx_ring;
392 unsigned int i = tx_ring->next_to_clean;
393 unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
394 union e1000_adv_tx_desc *eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
396 /* detected Tx unit hang */
397 dev_err(&adapter->pdev->dev,
398 "Detected Tx Unit Hang:\n"
401 " next_to_use <%x>\n"
402 " next_to_clean <%x>\n"
403 "buffer_info[next_to_clean]:\n"
404 " time_stamp <%lx>\n"
405 " next_to_watch <%x>\n"
407 " next_to_watch.status <%x>\n",
408 readl(adapter->hw.hw_addr + tx_ring->head),
409 readl(adapter->hw.hw_addr + tx_ring->tail),
410 tx_ring->next_to_use,
411 tx_ring->next_to_clean,
412 tx_ring->buffer_info[eop].time_stamp,
415 eop_desc->wb.status);
419 * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
420 * @adapter: board private structure
422 * Return 0 on success, negative on failure
424 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
425 struct igbvf_ring *tx_ring)
427 struct pci_dev *pdev = adapter->pdev;
430 size = sizeof(struct igbvf_buffer) * tx_ring->count;
431 tx_ring->buffer_info = vmalloc(size);
432 if (!tx_ring->buffer_info)
434 memset(tx_ring->buffer_info, 0, size);
436 /* round up to nearest 4K */
437 tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
438 tx_ring->size = ALIGN(tx_ring->size, 4096);
440 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
446 tx_ring->adapter = adapter;
447 tx_ring->next_to_use = 0;
448 tx_ring->next_to_clean = 0;
452 vfree(tx_ring->buffer_info);
453 dev_err(&adapter->pdev->dev,
454 "Unable to allocate memory for the transmit descriptor ring\n");
459 * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
460 * @adapter: board private structure
462 * Returns 0 on success, negative on failure
464 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
465 struct igbvf_ring *rx_ring)
467 struct pci_dev *pdev = adapter->pdev;
470 size = sizeof(struct igbvf_buffer) * rx_ring->count;
471 rx_ring->buffer_info = vmalloc(size);
472 if (!rx_ring->buffer_info)
474 memset(rx_ring->buffer_info, 0, size);
476 desc_len = sizeof(union e1000_adv_rx_desc);
478 /* Round up to nearest 4K */
479 rx_ring->size = rx_ring->count * desc_len;
480 rx_ring->size = ALIGN(rx_ring->size, 4096);
482 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
488 rx_ring->next_to_clean = 0;
489 rx_ring->next_to_use = 0;
491 rx_ring->adapter = adapter;
496 vfree(rx_ring->buffer_info);
497 rx_ring->buffer_info = NULL;
498 dev_err(&adapter->pdev->dev,
499 "Unable to allocate memory for the receive descriptor ring\n");
504 * igbvf_clean_tx_ring - Free Tx Buffers
505 * @tx_ring: ring to be cleaned
507 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
509 struct igbvf_adapter *adapter = tx_ring->adapter;
510 struct igbvf_buffer *buffer_info;
514 if (!tx_ring->buffer_info)
517 /* Free all the Tx ring sk_buffs */
518 for (i = 0; i < tx_ring->count; i++) {
519 buffer_info = &tx_ring->buffer_info[i];
520 igbvf_put_txbuf(adapter, buffer_info);
523 size = sizeof(struct igbvf_buffer) * tx_ring->count;
524 memset(tx_ring->buffer_info, 0, size);
526 /* Zero out the descriptor ring */
527 memset(tx_ring->desc, 0, tx_ring->size);
529 tx_ring->next_to_use = 0;
530 tx_ring->next_to_clean = 0;
532 writel(0, adapter->hw.hw_addr + tx_ring->head);
533 writel(0, adapter->hw.hw_addr + tx_ring->tail);
537 * igbvf_free_tx_resources - Free Tx Resources per Queue
538 * @tx_ring: ring to free resources from
540 * Free all transmit software resources
542 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
544 struct pci_dev *pdev = tx_ring->adapter->pdev;
546 igbvf_clean_tx_ring(tx_ring);
548 vfree(tx_ring->buffer_info);
549 tx_ring->buffer_info = NULL;
551 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
553 tx_ring->desc = NULL;
557 * igbvf_clean_rx_ring - Free Rx Buffers per Queue
558 * @adapter: board private structure
560 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
562 struct igbvf_adapter *adapter = rx_ring->adapter;
563 struct igbvf_buffer *buffer_info;
564 struct pci_dev *pdev = adapter->pdev;
568 if (!rx_ring->buffer_info)
571 /* Free all the Rx ring sk_buffs */
572 for (i = 0; i < rx_ring->count; i++) {
573 buffer_info = &rx_ring->buffer_info[i];
574 if (buffer_info->dma) {
575 if (adapter->rx_ps_hdr_size){
576 pci_unmap_single(pdev, buffer_info->dma,
577 adapter->rx_ps_hdr_size,
580 pci_unmap_single(pdev, buffer_info->dma,
581 adapter->rx_buffer_len,
584 buffer_info->dma = 0;
587 if (buffer_info->skb) {
588 dev_kfree_skb(buffer_info->skb);
589 buffer_info->skb = NULL;
592 if (buffer_info->page) {
593 if (buffer_info->page_dma)
594 pci_unmap_page(pdev, buffer_info->page_dma,
597 put_page(buffer_info->page);
598 buffer_info->page = NULL;
599 buffer_info->page_dma = 0;
600 buffer_info->page_offset = 0;
604 size = sizeof(struct igbvf_buffer) * rx_ring->count;
605 memset(rx_ring->buffer_info, 0, size);
607 /* Zero out the descriptor ring */
608 memset(rx_ring->desc, 0, rx_ring->size);
610 rx_ring->next_to_clean = 0;
611 rx_ring->next_to_use = 0;
613 writel(0, adapter->hw.hw_addr + rx_ring->head);
614 writel(0, adapter->hw.hw_addr + rx_ring->tail);
618 * igbvf_free_rx_resources - Free Rx Resources
619 * @rx_ring: ring to clean the resources from
621 * Free all receive software resources
624 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
626 struct pci_dev *pdev = rx_ring->adapter->pdev;
628 igbvf_clean_rx_ring(rx_ring);
630 vfree(rx_ring->buffer_info);
631 rx_ring->buffer_info = NULL;
633 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
635 rx_ring->desc = NULL;
639 * igbvf_update_itr - update the dynamic ITR value based on statistics
640 * @adapter: pointer to adapter
641 * @itr_setting: current adapter->itr
642 * @packets: the number of packets during this measurement interval
643 * @bytes: the number of bytes during this measurement interval
645 * Stores a new ITR value based on packets and byte
646 * counts during the last interrupt. The advantage of per interrupt
647 * computation is faster updates and more accurate ITR for the current
648 * traffic pattern. Constants in this function were computed
649 * based on theoretical maximum wire speed and thresholds were set based
650 * on testing data as well as attempting to minimize response time
651 * while increasing bulk throughput. This functionality is controlled
652 * by the InterruptThrottleRate module parameter.
654 static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter,
655 u16 itr_setting, int packets,
658 unsigned int retval = itr_setting;
661 goto update_itr_done;
663 switch (itr_setting) {
665 /* handle TSO and jumbo frames */
666 if (bytes/packets > 8000)
667 retval = bulk_latency;
668 else if ((packets < 5) && (bytes > 512))
669 retval = low_latency;
671 case low_latency: /* 50 usec aka 20000 ints/s */
673 /* this if handles the TSO accounting */
674 if (bytes/packets > 8000)
675 retval = bulk_latency;
676 else if ((packets < 10) || ((bytes/packets) > 1200))
677 retval = bulk_latency;
678 else if ((packets > 35))
679 retval = lowest_latency;
680 } else if (bytes/packets > 2000) {
681 retval = bulk_latency;
682 } else if (packets <= 2 && bytes < 512) {
683 retval = lowest_latency;
686 case bulk_latency: /* 250 usec aka 4000 ints/s */
689 retval = low_latency;
690 } else if (bytes < 6000) {
691 retval = low_latency;
700 static void igbvf_set_itr(struct igbvf_adapter *adapter)
702 struct e1000_hw *hw = &adapter->hw;
704 u32 new_itr = adapter->itr;
706 adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr,
707 adapter->total_tx_packets,
708 adapter->total_tx_bytes);
709 /* conservative mode (itr 3) eliminates the lowest_latency setting */
710 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
711 adapter->tx_itr = low_latency;
713 adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr,
714 adapter->total_rx_packets,
715 adapter->total_rx_bytes);
716 /* conservative mode (itr 3) eliminates the lowest_latency setting */
717 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
718 adapter->rx_itr = low_latency;
720 current_itr = max(adapter->rx_itr, adapter->tx_itr);
722 switch (current_itr) {
723 /* counts and packets in update_itr are dependent on these numbers */
728 new_itr = 20000; /* aka hwitr = ~200 */
737 if (new_itr != adapter->itr) {
739 * this attempts to bias the interrupt rate towards Bulk
740 * by adding intermediate steps when interrupt rate is
743 new_itr = new_itr > adapter->itr ?
744 min(adapter->itr + (new_itr >> 2), new_itr) :
746 adapter->itr = new_itr;
747 adapter->rx_ring->itr_val = 1952;
749 if (adapter->msix_entries)
750 adapter->rx_ring->set_itr = 1;
757 * igbvf_clean_tx_irq - Reclaim resources after transmit completes
758 * @adapter: board private structure
759 * returns true if ring is completely cleaned
761 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
763 struct igbvf_adapter *adapter = tx_ring->adapter;
764 struct e1000_hw *hw = &adapter->hw;
765 struct net_device *netdev = adapter->netdev;
766 struct igbvf_buffer *buffer_info;
768 union e1000_adv_tx_desc *tx_desc, *eop_desc;
769 unsigned int total_bytes = 0, total_packets = 0;
770 unsigned int i, eop, count = 0;
771 bool cleaned = false;
773 i = tx_ring->next_to_clean;
774 eop = tx_ring->buffer_info[i].next_to_watch;
775 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
777 while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
778 (count < tx_ring->count)) {
779 for (cleaned = false; !cleaned; count++) {
780 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
781 buffer_info = &tx_ring->buffer_info[i];
782 cleaned = (i == eop);
783 skb = buffer_info->skb;
786 unsigned int segs, bytecount;
788 /* gso_segs is currently only valid for tcp */
789 segs = skb_shinfo(skb)->gso_segs ?: 1;
790 /* multiply data chunks by size of headers */
791 bytecount = ((segs - 1) * skb_headlen(skb)) +
793 total_packets += segs;
794 total_bytes += bytecount;
797 igbvf_put_txbuf(adapter, buffer_info);
798 tx_desc->wb.status = 0;
801 if (i == tx_ring->count)
804 eop = tx_ring->buffer_info[i].next_to_watch;
805 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
808 tx_ring->next_to_clean = i;
810 if (unlikely(count &&
811 netif_carrier_ok(netdev) &&
812 igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
813 /* Make sure that anybody stopping the queue after this
814 * sees the new next_to_clean.
817 if (netif_queue_stopped(netdev) &&
818 !(test_bit(__IGBVF_DOWN, &adapter->state))) {
819 netif_wake_queue(netdev);
820 ++adapter->restart_queue;
824 if (adapter->detect_tx_hung) {
825 /* Detect a transmit hang in hardware, this serializes the
826 * check with the clearing of time_stamp and movement of i */
827 adapter->detect_tx_hung = false;
828 if (tx_ring->buffer_info[i].time_stamp &&
829 time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
830 (adapter->tx_timeout_factor * HZ)) &&
831 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
833 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
834 /* detected Tx unit hang */
835 igbvf_print_tx_hang(adapter);
837 netif_stop_queue(netdev);
840 adapter->net_stats.tx_bytes += total_bytes;
841 adapter->net_stats.tx_packets += total_packets;
842 return (count < tx_ring->count);
845 static irqreturn_t igbvf_msix_other(int irq, void *data)
847 struct net_device *netdev = data;
848 struct igbvf_adapter *adapter = netdev_priv(netdev);
849 struct e1000_hw *hw = &adapter->hw;
851 adapter->int_counter1++;
853 netif_carrier_off(netdev);
854 hw->mac.get_link_status = 1;
855 if (!test_bit(__IGBVF_DOWN, &adapter->state))
856 mod_timer(&adapter->watchdog_timer, jiffies + 1);
858 ew32(EIMS, adapter->eims_other);
863 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
865 struct net_device *netdev = data;
866 struct igbvf_adapter *adapter = netdev_priv(netdev);
867 struct e1000_hw *hw = &adapter->hw;
868 struct igbvf_ring *tx_ring = adapter->tx_ring;
871 adapter->total_tx_bytes = 0;
872 adapter->total_tx_packets = 0;
874 /* auto mask will automatically reenable the interrupt when we write
876 if (!igbvf_clean_tx_irq(tx_ring))
877 /* Ring was not completely cleaned, so fire another interrupt */
878 ew32(EICS, tx_ring->eims_value);
880 ew32(EIMS, tx_ring->eims_value);
885 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
887 struct net_device *netdev = data;
888 struct igbvf_adapter *adapter = netdev_priv(netdev);
890 adapter->int_counter0++;
892 /* Write the ITR value calculated at the end of the
893 * previous interrupt.
895 if (adapter->rx_ring->set_itr) {
896 writel(adapter->rx_ring->itr_val,
897 adapter->hw.hw_addr + adapter->rx_ring->itr_register);
898 adapter->rx_ring->set_itr = 0;
901 if (napi_schedule_prep(&adapter->rx_ring->napi)) {
902 adapter->total_rx_bytes = 0;
903 adapter->total_rx_packets = 0;
904 __napi_schedule(&adapter->rx_ring->napi);
910 #define IGBVF_NO_QUEUE -1
912 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
913 int tx_queue, int msix_vector)
915 struct e1000_hw *hw = &adapter->hw;
918 /* 82576 uses a table-based method for assigning vectors.
919 Each queue has a single entry in the table to which we write
920 a vector number along with a "valid" bit. Sadly, the layout
921 of the table is somewhat counterintuitive. */
922 if (rx_queue > IGBVF_NO_QUEUE) {
923 index = (rx_queue >> 1);
924 ivar = array_er32(IVAR0, index);
925 if (rx_queue & 0x1) {
926 /* vector goes into third byte of register */
927 ivar = ivar & 0xFF00FFFF;
928 ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
930 /* vector goes into low byte of register */
931 ivar = ivar & 0xFFFFFF00;
932 ivar |= msix_vector | E1000_IVAR_VALID;
934 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
935 array_ew32(IVAR0, index, ivar);
937 if (tx_queue > IGBVF_NO_QUEUE) {
938 index = (tx_queue >> 1);
939 ivar = array_er32(IVAR0, index);
940 if (tx_queue & 0x1) {
941 /* vector goes into high byte of register */
942 ivar = ivar & 0x00FFFFFF;
943 ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
945 /* vector goes into second byte of register */
946 ivar = ivar & 0xFFFF00FF;
947 ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
949 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
950 array_ew32(IVAR0, index, ivar);
955 * igbvf_configure_msix - Configure MSI-X hardware
957 * igbvf_configure_msix sets up the hardware to properly
958 * generate MSI-X interrupts.
960 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
963 struct e1000_hw *hw = &adapter->hw;
964 struct igbvf_ring *tx_ring = adapter->tx_ring;
965 struct igbvf_ring *rx_ring = adapter->rx_ring;
968 adapter->eims_enable_mask = 0;
970 igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
971 adapter->eims_enable_mask |= tx_ring->eims_value;
972 if (tx_ring->itr_val)
973 writel(tx_ring->itr_val,
974 hw->hw_addr + tx_ring->itr_register);
976 writel(1952, hw->hw_addr + tx_ring->itr_register);
978 igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
979 adapter->eims_enable_mask |= rx_ring->eims_value;
980 if (rx_ring->itr_val)
981 writel(rx_ring->itr_val,
982 hw->hw_addr + rx_ring->itr_register);
984 writel(1952, hw->hw_addr + rx_ring->itr_register);
986 /* set vector for other causes, i.e. link changes */
988 tmp = (vector++ | E1000_IVAR_VALID);
990 ew32(IVAR_MISC, tmp);
992 adapter->eims_enable_mask = (1 << (vector)) - 1;
993 adapter->eims_other = 1 << (vector - 1);
997 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
999 if (adapter->msix_entries) {
1000 pci_disable_msix(adapter->pdev);
1001 kfree(adapter->msix_entries);
1002 adapter->msix_entries = NULL;
1007 * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1009 * Attempt to configure interrupts using the best available
1010 * capabilities of the hardware and kernel.
1012 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1017 /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
1018 adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1020 if (adapter->msix_entries) {
1021 for (i = 0; i < 3; i++)
1022 adapter->msix_entries[i].entry = i;
1024 err = pci_enable_msix(adapter->pdev,
1025 adapter->msix_entries, 3);
1030 dev_err(&adapter->pdev->dev,
1031 "Failed to initialize MSI-X interrupts.\n");
1032 igbvf_reset_interrupt_capability(adapter);
1037 * igbvf_request_msix - Initialize MSI-X interrupts
1039 * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1042 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1044 struct net_device *netdev = adapter->netdev;
1045 int err = 0, vector = 0;
1047 if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1048 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1049 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1051 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1052 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1055 err = request_irq(adapter->msix_entries[vector].vector,
1056 igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1061 adapter->tx_ring->itr_register = E1000_EITR(vector);
1062 adapter->tx_ring->itr_val = 1952;
1065 err = request_irq(adapter->msix_entries[vector].vector,
1066 igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1071 adapter->rx_ring->itr_register = E1000_EITR(vector);
1072 adapter->rx_ring->itr_val = 1952;
1075 err = request_irq(adapter->msix_entries[vector].vector,
1076 igbvf_msix_other, 0, netdev->name, netdev);
1080 igbvf_configure_msix(adapter);
1087 * igbvf_alloc_queues - Allocate memory for all rings
1088 * @adapter: board private structure to initialize
1090 static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
1092 struct net_device *netdev = adapter->netdev;
1094 adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1095 if (!adapter->tx_ring)
1098 adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1099 if (!adapter->rx_ring) {
1100 kfree(adapter->tx_ring);
1104 netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1110 * igbvf_request_irq - initialize interrupts
1112 * Attempts to configure interrupts using the best available
1113 * capabilities of the hardware and kernel.
1115 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1119 /* igbvf supports msi-x only */
1120 if (adapter->msix_entries)
1121 err = igbvf_request_msix(adapter);
1126 dev_err(&adapter->pdev->dev,
1127 "Unable to allocate interrupt, Error: %d\n", err);
1132 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1134 struct net_device *netdev = adapter->netdev;
1137 if (adapter->msix_entries) {
1138 for (vector = 0; vector < 3; vector++)
1139 free_irq(adapter->msix_entries[vector].vector, netdev);
1144 * igbvf_irq_disable - Mask off interrupt generation on the NIC
1146 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1148 struct e1000_hw *hw = &adapter->hw;
1152 if (adapter->msix_entries)
1157 * igbvf_irq_enable - Enable default interrupt generation settings
1159 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1161 struct e1000_hw *hw = &adapter->hw;
1163 ew32(EIAC, adapter->eims_enable_mask);
1164 ew32(EIAM, adapter->eims_enable_mask);
1165 ew32(EIMS, adapter->eims_enable_mask);
1169 * igbvf_poll - NAPI Rx polling callback
1170 * @napi: struct associated with this polling callback
1171 * @budget: amount of packets driver is allowed to process this poll
1173 static int igbvf_poll(struct napi_struct *napi, int budget)
1175 struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1176 struct igbvf_adapter *adapter = rx_ring->adapter;
1177 struct e1000_hw *hw = &adapter->hw;
1180 igbvf_clean_rx_irq(adapter, &work_done, budget);
1182 /* If not enough Rx work done, exit the polling mode */
1183 if (work_done < budget) {
1184 napi_complete(napi);
1186 if (adapter->itr_setting & 3)
1187 igbvf_set_itr(adapter);
1189 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1190 ew32(EIMS, adapter->rx_ring->eims_value);
1197 * igbvf_set_rlpml - set receive large packet maximum length
1198 * @adapter: board private structure
1200 * Configure the maximum size of packets that will be received
1202 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1204 int max_frame_size = adapter->max_frame_size;
1205 struct e1000_hw *hw = &adapter->hw;
1208 max_frame_size += VLAN_TAG_SIZE;
1210 e1000_rlpml_set_vf(hw, max_frame_size);
1213 static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1215 struct igbvf_adapter *adapter = netdev_priv(netdev);
1216 struct e1000_hw *hw = &adapter->hw;
1218 if (hw->mac.ops.set_vfta(hw, vid, true))
1219 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1222 static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1224 struct igbvf_adapter *adapter = netdev_priv(netdev);
1225 struct e1000_hw *hw = &adapter->hw;
1227 igbvf_irq_disable(adapter);
1228 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1230 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1231 igbvf_irq_enable(adapter);
1233 if (hw->mac.ops.set_vfta(hw, vid, false))
1234 dev_err(&adapter->pdev->dev,
1235 "Failed to remove vlan id %d\n", vid);
1238 static void igbvf_vlan_rx_register(struct net_device *netdev,
1239 struct vlan_group *grp)
1241 struct igbvf_adapter *adapter = netdev_priv(netdev);
1243 adapter->vlgrp = grp;
1246 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1250 if (!adapter->vlgrp)
1253 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1254 if (!vlan_group_get_device(adapter->vlgrp, vid))
1256 igbvf_vlan_rx_add_vid(adapter->netdev, vid);
1259 igbvf_set_rlpml(adapter);
1263 * igbvf_configure_tx - Configure Transmit Unit after Reset
1264 * @adapter: board private structure
1266 * Configure the Tx unit of the MAC after a reset.
1268 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1270 struct e1000_hw *hw = &adapter->hw;
1271 struct igbvf_ring *tx_ring = adapter->tx_ring;
1273 u32 txdctl, dca_txctrl;
1275 /* disable transmits */
1276 txdctl = er32(TXDCTL(0));
1277 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1280 /* Setup the HW Tx Head and Tail descriptor pointers */
1281 ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1282 tdba = tx_ring->dma;
1283 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1284 ew32(TDBAH(0), (tdba >> 32));
1287 tx_ring->head = E1000_TDH(0);
1288 tx_ring->tail = E1000_TDT(0);
1290 /* Turn off Relaxed Ordering on head write-backs. The writebacks
1291 * MUST be delivered in order or it will completely screw up
1294 dca_txctrl = er32(DCA_TXCTRL(0));
1295 dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1296 ew32(DCA_TXCTRL(0), dca_txctrl);
1298 /* enable transmits */
1299 txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1300 ew32(TXDCTL(0), txdctl);
1302 /* Setup Transmit Descriptor Settings for eop descriptor */
1303 adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1305 /* enable Report Status bit */
1306 adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1308 adapter->tx_queue_len = adapter->netdev->tx_queue_len;
1312 * igbvf_setup_srrctl - configure the receive control registers
1313 * @adapter: Board private structure
1315 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1317 struct e1000_hw *hw = &adapter->hw;
1320 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1321 E1000_SRRCTL_BSIZEHDR_MASK |
1322 E1000_SRRCTL_BSIZEPKT_MASK);
1324 /* Enable queue drop to avoid head of line blocking */
1325 srrctl |= E1000_SRRCTL_DROP_EN;
1327 /* Setup buffer sizes */
1328 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1329 E1000_SRRCTL_BSIZEPKT_SHIFT;
1331 if (adapter->rx_buffer_len < 2048) {
1332 adapter->rx_ps_hdr_size = 0;
1333 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1335 adapter->rx_ps_hdr_size = 128;
1336 srrctl |= adapter->rx_ps_hdr_size <<
1337 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1338 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1341 ew32(SRRCTL(0), srrctl);
1345 * igbvf_configure_rx - Configure Receive Unit after Reset
1346 * @adapter: board private structure
1348 * Configure the Rx unit of the MAC after a reset.
1350 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1352 struct e1000_hw *hw = &adapter->hw;
1353 struct igbvf_ring *rx_ring = adapter->rx_ring;
1357 /* disable receives */
1358 rxdctl = er32(RXDCTL(0));
1359 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1362 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1365 * Setup the HW Rx Head and Tail Descriptor Pointers and
1366 * the Base and Length of the Rx Descriptor Ring
1368 rdba = rx_ring->dma;
1369 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1370 ew32(RDBAH(0), (rdba >> 32));
1371 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1372 rx_ring->head = E1000_RDH(0);
1373 rx_ring->tail = E1000_RDT(0);
1377 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1378 rxdctl &= 0xFFF00000;
1379 rxdctl |= IGBVF_RX_PTHRESH;
1380 rxdctl |= IGBVF_RX_HTHRESH << 8;
1381 rxdctl |= IGBVF_RX_WTHRESH << 16;
1383 igbvf_set_rlpml(adapter);
1385 /* enable receives */
1386 ew32(RXDCTL(0), rxdctl);
1390 * igbvf_set_multi - Multicast and Promiscuous mode set
1391 * @netdev: network interface device structure
1393 * The set_multi entry point is called whenever the multicast address
1394 * list or the network interface flags are updated. This routine is
1395 * responsible for configuring the hardware for proper multicast,
1396 * promiscuous mode, and all-multi behavior.
1398 static void igbvf_set_multi(struct net_device *netdev)
1400 struct igbvf_adapter *adapter = netdev_priv(netdev);
1401 struct e1000_hw *hw = &adapter->hw;
1402 struct dev_mc_list *mc_ptr;
1403 u8 *mta_list = NULL;
1406 if (netdev->mc_count) {
1407 mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
1409 dev_err(&adapter->pdev->dev,
1410 "failed to allocate multicast filter list\n");
1415 /* prepare a packed array of only addresses. */
1416 mc_ptr = netdev->mc_list;
1418 for (i = 0; i < netdev->mc_count; i++) {
1421 memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
1423 mc_ptr = mc_ptr->next;
1426 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1431 * igbvf_configure - configure the hardware for Rx and Tx
1432 * @adapter: private board structure
1434 static void igbvf_configure(struct igbvf_adapter *adapter)
1436 igbvf_set_multi(adapter->netdev);
1438 igbvf_restore_vlan(adapter);
1440 igbvf_configure_tx(adapter);
1441 igbvf_setup_srrctl(adapter);
1442 igbvf_configure_rx(adapter);
1443 igbvf_alloc_rx_buffers(adapter->rx_ring,
1444 igbvf_desc_unused(adapter->rx_ring));
1447 /* igbvf_reset - bring the hardware into a known good state
1449 * This function boots the hardware and enables some settings that
1450 * require a configuration cycle of the hardware - those cannot be
1451 * set/changed during runtime. After reset the device needs to be
1452 * properly configured for Rx, Tx etc.
1454 static void igbvf_reset(struct igbvf_adapter *adapter)
1456 struct e1000_mac_info *mac = &adapter->hw.mac;
1457 struct net_device *netdev = adapter->netdev;
1458 struct e1000_hw *hw = &adapter->hw;
1460 /* Allow time for pending master requests to run */
1461 if (mac->ops.reset_hw(hw))
1462 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1464 mac->ops.init_hw(hw);
1466 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1467 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1469 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1473 adapter->last_reset = jiffies;
1476 int igbvf_up(struct igbvf_adapter *adapter)
1478 struct e1000_hw *hw = &adapter->hw;
1480 /* hardware has been reset, we need to reload some things */
1481 igbvf_configure(adapter);
1483 clear_bit(__IGBVF_DOWN, &adapter->state);
1485 napi_enable(&adapter->rx_ring->napi);
1486 if (adapter->msix_entries)
1487 igbvf_configure_msix(adapter);
1489 /* Clear any pending interrupts. */
1491 igbvf_irq_enable(adapter);
1493 /* start the watchdog */
1494 hw->mac.get_link_status = 1;
1495 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1501 void igbvf_down(struct igbvf_adapter *adapter)
1503 struct net_device *netdev = adapter->netdev;
1504 struct e1000_hw *hw = &adapter->hw;
1508 * signal that we're down so the interrupt handler does not
1509 * reschedule our watchdog timer
1511 set_bit(__IGBVF_DOWN, &adapter->state);
1513 /* disable receives in the hardware */
1514 rxdctl = er32(RXDCTL(0));
1515 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1517 netif_stop_queue(netdev);
1519 /* disable transmits in the hardware */
1520 txdctl = er32(TXDCTL(0));
1521 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1523 /* flush both disables and wait for them to finish */
1527 napi_disable(&adapter->rx_ring->napi);
1529 igbvf_irq_disable(adapter);
1531 del_timer_sync(&adapter->watchdog_timer);
1533 netdev->tx_queue_len = adapter->tx_queue_len;
1534 netif_carrier_off(netdev);
1536 /* record the stats before reset*/
1537 igbvf_update_stats(adapter);
1539 adapter->link_speed = 0;
1540 adapter->link_duplex = 0;
1542 igbvf_reset(adapter);
1543 igbvf_clean_tx_ring(adapter->tx_ring);
1544 igbvf_clean_rx_ring(adapter->rx_ring);
1547 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1550 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1552 igbvf_down(adapter);
1554 clear_bit(__IGBVF_RESETTING, &adapter->state);
1558 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1559 * @adapter: board private structure to initialize
1561 * igbvf_sw_init initializes the Adapter private data structure.
1562 * Fields are initialized based on PCI device information and
1563 * OS network device settings (MTU size).
1565 static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
1567 struct net_device *netdev = adapter->netdev;
1570 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1571 adapter->rx_ps_hdr_size = 0;
1572 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1573 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1575 adapter->tx_int_delay = 8;
1576 adapter->tx_abs_int_delay = 32;
1577 adapter->rx_int_delay = 0;
1578 adapter->rx_abs_int_delay = 8;
1579 adapter->itr_setting = 3;
1580 adapter->itr = 20000;
1582 /* Set various function pointers */
1583 adapter->ei->init_ops(&adapter->hw);
1585 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1589 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1593 igbvf_set_interrupt_capability(adapter);
1595 if (igbvf_alloc_queues(adapter))
1598 spin_lock_init(&adapter->tx_queue_lock);
1600 /* Explicitly disable IRQ since the NIC can be in any state. */
1601 igbvf_irq_disable(adapter);
1603 spin_lock_init(&adapter->stats_lock);
1605 set_bit(__IGBVF_DOWN, &adapter->state);
1609 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1611 struct e1000_hw *hw = &adapter->hw;
1613 adapter->stats.last_gprc = er32(VFGPRC);
1614 adapter->stats.last_gorc = er32(VFGORC);
1615 adapter->stats.last_gptc = er32(VFGPTC);
1616 adapter->stats.last_gotc = er32(VFGOTC);
1617 adapter->stats.last_mprc = er32(VFMPRC);
1618 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1619 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1620 adapter->stats.last_gorlbc = er32(VFGORLBC);
1621 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1623 adapter->stats.base_gprc = er32(VFGPRC);
1624 adapter->stats.base_gorc = er32(VFGORC);
1625 adapter->stats.base_gptc = er32(VFGPTC);
1626 adapter->stats.base_gotc = er32(VFGOTC);
1627 adapter->stats.base_mprc = er32(VFMPRC);
1628 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1629 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1630 adapter->stats.base_gorlbc = er32(VFGORLBC);
1631 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1635 * igbvf_open - Called when a network interface is made active
1636 * @netdev: network interface device structure
1638 * Returns 0 on success, negative value on failure
1640 * The open entry point is called when a network interface is made
1641 * active by the system (IFF_UP). At this point all resources needed
1642 * for transmit and receive operations are allocated, the interrupt
1643 * handler is registered with the OS, the watchdog timer is started,
1644 * and the stack is notified that the interface is ready.
1646 static int igbvf_open(struct net_device *netdev)
1648 struct igbvf_adapter *adapter = netdev_priv(netdev);
1649 struct e1000_hw *hw = &adapter->hw;
1652 /* disallow open during test */
1653 if (test_bit(__IGBVF_TESTING, &adapter->state))
1656 /* allocate transmit descriptors */
1657 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1661 /* allocate receive descriptors */
1662 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1667 * before we allocate an interrupt, we must be ready to handle it.
1668 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1669 * as soon as we call pci_request_irq, so we have to setup our
1670 * clean_rx handler before we do so.
1672 igbvf_configure(adapter);
1674 err = igbvf_request_irq(adapter);
1678 /* From here on the code is the same as igbvf_up() */
1679 clear_bit(__IGBVF_DOWN, &adapter->state);
1681 napi_enable(&adapter->rx_ring->napi);
1683 /* clear any pending interrupts */
1686 igbvf_irq_enable(adapter);
1688 /* start the watchdog */
1689 hw->mac.get_link_status = 1;
1690 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1695 igbvf_free_rx_resources(adapter->rx_ring);
1697 igbvf_free_tx_resources(adapter->tx_ring);
1699 igbvf_reset(adapter);
1705 * igbvf_close - Disables a network interface
1706 * @netdev: network interface device structure
1708 * Returns 0, this is not allowed to fail
1710 * The close entry point is called when an interface is de-activated
1711 * by the OS. The hardware is still under the drivers control, but
1712 * needs to be disabled. A global MAC reset is issued to stop the
1713 * hardware, and all transmit and receive resources are freed.
1715 static int igbvf_close(struct net_device *netdev)
1717 struct igbvf_adapter *adapter = netdev_priv(netdev);
1719 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1720 igbvf_down(adapter);
1722 igbvf_free_irq(adapter);
1724 igbvf_free_tx_resources(adapter->tx_ring);
1725 igbvf_free_rx_resources(adapter->rx_ring);
1730 * igbvf_set_mac - Change the Ethernet Address of the NIC
1731 * @netdev: network interface device structure
1732 * @p: pointer to an address structure
1734 * Returns 0 on success, negative on failure
1736 static int igbvf_set_mac(struct net_device *netdev, void *p)
1738 struct igbvf_adapter *adapter = netdev_priv(netdev);
1739 struct e1000_hw *hw = &adapter->hw;
1740 struct sockaddr *addr = p;
1742 if (!is_valid_ether_addr(addr->sa_data))
1743 return -EADDRNOTAVAIL;
1745 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1747 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1749 if (memcmp(addr->sa_data, hw->mac.addr, 6))
1750 return -EADDRNOTAVAIL;
1752 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1757 #define UPDATE_VF_COUNTER(reg, name) \
1759 u32 current_counter = er32(reg); \
1760 if (current_counter < adapter->stats.last_##name) \
1761 adapter->stats.name += 0x100000000LL; \
1762 adapter->stats.last_##name = current_counter; \
1763 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1764 adapter->stats.name |= current_counter; \
1768 * igbvf_update_stats - Update the board statistics counters
1769 * @adapter: board private structure
1771 void igbvf_update_stats(struct igbvf_adapter *adapter)
1773 struct e1000_hw *hw = &adapter->hw;
1774 struct pci_dev *pdev = adapter->pdev;
1777 * Prevent stats update while adapter is being reset, link is down
1778 * or if the pci connection is down.
1780 if (adapter->link_speed == 0)
1783 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1786 if (pci_channel_offline(pdev))
1789 UPDATE_VF_COUNTER(VFGPRC, gprc);
1790 UPDATE_VF_COUNTER(VFGORC, gorc);
1791 UPDATE_VF_COUNTER(VFGPTC, gptc);
1792 UPDATE_VF_COUNTER(VFGOTC, gotc);
1793 UPDATE_VF_COUNTER(VFMPRC, mprc);
1794 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1795 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1796 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1797 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1799 /* Fill out the OS statistics structure */
1800 adapter->net_stats.multicast = adapter->stats.mprc;
1803 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1805 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n",
1806 adapter->link_speed,
1807 ((adapter->link_duplex == FULL_DUPLEX) ?
1808 "Full Duplex" : "Half Duplex"));
1811 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1813 struct e1000_hw *hw = &adapter->hw;
1814 s32 ret_val = E1000_SUCCESS;
1817 /* If interface is down, stay link down */
1818 if (test_bit(__IGBVF_DOWN, &adapter->state))
1821 ret_val = hw->mac.ops.check_for_link(hw);
1822 link_active = !hw->mac.get_link_status;
1824 /* if check for link returns error we will need to reset */
1825 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1826 schedule_work(&adapter->reset_task);
1832 * igbvf_watchdog - Timer Call-back
1833 * @data: pointer to adapter cast into an unsigned long
1835 static void igbvf_watchdog(unsigned long data)
1837 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
1839 /* Do the rest outside of interrupt context */
1840 schedule_work(&adapter->watchdog_task);
1843 static void igbvf_watchdog_task(struct work_struct *work)
1845 struct igbvf_adapter *adapter = container_of(work,
1846 struct igbvf_adapter,
1848 struct net_device *netdev = adapter->netdev;
1849 struct e1000_mac_info *mac = &adapter->hw.mac;
1850 struct igbvf_ring *tx_ring = adapter->tx_ring;
1851 struct e1000_hw *hw = &adapter->hw;
1855 link = igbvf_has_link(adapter);
1858 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);
1867 * tweak tx_queue_len according to speed/duplex
1868 * and adjust the timeout factor
1870 netdev->tx_queue_len = adapter->tx_queue_len;
1871 adapter->tx_timeout_factor = 1;
1872 switch (adapter->link_speed) {
1875 netdev->tx_queue_len = 10;
1876 adapter->tx_timeout_factor = 16;
1880 netdev->tx_queue_len = 100;
1881 /* maybe add some timeout factor ? */
1885 netif_carrier_on(netdev);
1886 netif_wake_queue(netdev);
1889 if (netif_carrier_ok(netdev)) {
1890 adapter->link_speed = 0;
1891 adapter->link_duplex = 0;
1892 dev_info(&adapter->pdev->dev, "Link is Down\n");
1893 netif_carrier_off(netdev);
1894 netif_stop_queue(netdev);
1898 if (netif_carrier_ok(netdev)) {
1899 igbvf_update_stats(adapter);
1901 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1905 * We've lost link, so the controller stops DMA,
1906 * but we've got queued Tx work that's never going
1907 * to get done, so reset controller to flush Tx.
1908 * (Do the reset outside of interrupt context).
1910 adapter->tx_timeout_count++;
1911 schedule_work(&adapter->reset_task);
1915 /* Cause software interrupt to ensure Rx ring is cleaned */
1916 ew32(EICS, adapter->rx_ring->eims_value);
1918 /* Force detection of hung controller every watchdog period */
1919 adapter->detect_tx_hung = 1;
1921 /* Reset the timer */
1922 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1923 mod_timer(&adapter->watchdog_timer,
1924 round_jiffies(jiffies + (2 * HZ)));
1927 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1928 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1929 #define IGBVF_TX_FLAGS_TSO 0x00000004
1930 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1931 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1932 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1934 static int igbvf_tso(struct igbvf_adapter *adapter,
1935 struct igbvf_ring *tx_ring,
1936 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1938 struct e1000_adv_tx_context_desc *context_desc;
1941 struct igbvf_buffer *buffer_info;
1942 u32 info = 0, tu_cmd = 0;
1943 u32 mss_l4len_idx, l4len;
1946 if (skb_header_cloned(skb)) {
1947 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1949 dev_err(&adapter->pdev->dev,
1950 "igbvf_tso returning an error\n");
1955 l4len = tcp_hdrlen(skb);
1958 if (skb->protocol == htons(ETH_P_IP)) {
1959 struct iphdr *iph = ip_hdr(skb);
1962 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1966 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
1967 ipv6_hdr(skb)->payload_len = 0;
1968 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1969 &ipv6_hdr(skb)->daddr,
1973 i = tx_ring->next_to_use;
1975 buffer_info = &tx_ring->buffer_info[i];
1976 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1977 /* VLAN MACLEN IPLEN */
1978 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1979 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1980 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1981 *hdr_len += skb_network_offset(skb);
1982 info |= (skb_transport_header(skb) - skb_network_header(skb));
1983 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1984 context_desc->vlan_macip_lens = cpu_to_le32(info);
1986 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1987 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1989 if (skb->protocol == htons(ETH_P_IP))
1990 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1991 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1993 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1996 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1997 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1999 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2000 context_desc->seqnum_seed = 0;
2002 buffer_info->time_stamp = jiffies;
2003 buffer_info->next_to_watch = i;
2004 buffer_info->dma = 0;
2006 if (i == tx_ring->count)
2009 tx_ring->next_to_use = i;
2014 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
2015 struct igbvf_ring *tx_ring,
2016 struct sk_buff *skb, u32 tx_flags)
2018 struct e1000_adv_tx_context_desc *context_desc;
2020 struct igbvf_buffer *buffer_info;
2021 u32 info = 0, tu_cmd = 0;
2023 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
2024 (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
2025 i = tx_ring->next_to_use;
2026 buffer_info = &tx_ring->buffer_info[i];
2027 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
2029 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2030 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
2032 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2033 if (skb->ip_summed == CHECKSUM_PARTIAL)
2034 info |= (skb_transport_header(skb) -
2035 skb_network_header(skb));
2038 context_desc->vlan_macip_lens = cpu_to_le32(info);
2040 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2042 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2043 switch (skb->protocol) {
2044 case __constant_htons(ETH_P_IP):
2045 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
2046 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2047 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2049 case __constant_htons(ETH_P_IPV6):
2050 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2051 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2058 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2059 context_desc->seqnum_seed = 0;
2060 context_desc->mss_l4len_idx = 0;
2062 buffer_info->time_stamp = jiffies;
2063 buffer_info->next_to_watch = i;
2064 buffer_info->dma = 0;
2066 if (i == tx_ring->count)
2068 tx_ring->next_to_use = i;
2076 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2078 struct igbvf_adapter *adapter = netdev_priv(netdev);
2080 /* there is enough descriptors then we don't need to worry */
2081 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2084 netif_stop_queue(netdev);
2088 /* We need to check again just in case room has been made available */
2089 if (igbvf_desc_unused(adapter->tx_ring) < size)
2092 netif_wake_queue(netdev);
2094 ++adapter->restart_queue;
2098 #define IGBVF_MAX_TXD_PWR 16
2099 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2101 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2102 struct igbvf_ring *tx_ring,
2103 struct sk_buff *skb,
2106 struct igbvf_buffer *buffer_info;
2107 struct pci_dev *pdev = adapter->pdev;
2108 unsigned int len = skb_headlen(skb);
2109 unsigned int count = 0, i;
2112 i = tx_ring->next_to_use;
2114 buffer_info = &tx_ring->buffer_info[i];
2115 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2116 buffer_info->length = len;
2117 /* set time_stamp *before* dma to help avoid a possible race */
2118 buffer_info->time_stamp = jiffies;
2119 buffer_info->next_to_watch = i;
2120 buffer_info->dma = pci_map_single(pdev, skb->data, len,
2122 if (pci_dma_mapping_error(pdev, buffer_info->dma))
2126 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2127 struct skb_frag_struct *frag;
2130 if (i == tx_ring->count)
2133 frag = &skb_shinfo(skb)->frags[f];
2136 buffer_info = &tx_ring->buffer_info[i];
2137 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2138 buffer_info->length = len;
2139 buffer_info->time_stamp = jiffies;
2140 buffer_info->next_to_watch = i;
2141 buffer_info->mapped_as_page = true;
2142 buffer_info->dma = pci_map_page(pdev,
2147 if (pci_dma_mapping_error(pdev, buffer_info->dma))
2152 tx_ring->buffer_info[i].skb = skb;
2153 tx_ring->buffer_info[first].next_to_watch = i;
2158 dev_err(&pdev->dev, "TX DMA map failed\n");
2160 /* clear timestamp and dma mappings for failed buffer_info mapping */
2161 buffer_info->dma = 0;
2162 buffer_info->time_stamp = 0;
2163 buffer_info->length = 0;
2164 buffer_info->next_to_watch = 0;
2165 buffer_info->mapped_as_page = false;
2168 /* clear timestamp and dma mappings for remaining portion of packet */
2169 while (count >= 0) {
2173 i += tx_ring->count;
2174 buffer_info = &tx_ring->buffer_info[i];
2175 igbvf_put_txbuf(adapter, buffer_info);
2181 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2182 struct igbvf_ring *tx_ring,
2183 int tx_flags, int count, u32 paylen,
2186 union e1000_adv_tx_desc *tx_desc = NULL;
2187 struct igbvf_buffer *buffer_info;
2188 u32 olinfo_status = 0, cmd_type_len;
2191 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2192 E1000_ADVTXD_DCMD_DEXT);
2194 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2195 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2197 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2198 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2200 /* insert tcp checksum */
2201 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2203 /* insert ip checksum */
2204 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2205 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2207 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2208 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2211 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2213 i = tx_ring->next_to_use;
2215 buffer_info = &tx_ring->buffer_info[i];
2216 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2217 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2218 tx_desc->read.cmd_type_len =
2219 cpu_to_le32(cmd_type_len | buffer_info->length);
2220 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2222 if (i == tx_ring->count)
2226 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2227 /* Force memory writes to complete before letting h/w
2228 * know there are new descriptors to fetch. (Only
2229 * applicable for weak-ordered memory model archs,
2230 * such as IA-64). */
2233 tx_ring->next_to_use = i;
2234 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2235 /* we need this if more than one processor can write to our tail
2236 * at a time, it syncronizes IO on IA64/Altix systems */
2240 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2241 struct net_device *netdev,
2242 struct igbvf_ring *tx_ring)
2244 struct igbvf_adapter *adapter = netdev_priv(netdev);
2245 unsigned int first, tx_flags = 0;
2250 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2251 dev_kfree_skb_any(skb);
2252 return NETDEV_TX_OK;
2255 if (skb->len <= 0) {
2256 dev_kfree_skb_any(skb);
2257 return NETDEV_TX_OK;
2261 * need: count + 4 desc gap to keep tail from touching
2262 * + 2 desc gap to keep tail from touching head,
2263 * + 1 desc for skb->data,
2264 * + 1 desc for context descriptor,
2265 * head, otherwise try next time
2267 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2268 /* this is a hard error */
2269 return NETDEV_TX_BUSY;
2272 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2273 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2274 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
2277 if (skb->protocol == htons(ETH_P_IP))
2278 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2280 first = tx_ring->next_to_use;
2282 tso = skb_is_gso(skb) ?
2283 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
2284 if (unlikely(tso < 0)) {
2285 dev_kfree_skb_any(skb);
2286 return NETDEV_TX_OK;
2290 tx_flags |= IGBVF_TX_FLAGS_TSO;
2291 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2292 (skb->ip_summed == CHECKSUM_PARTIAL))
2293 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2296 * count reflects descriptors mapped, if 0 then mapping error
2297 * has occured and we need to rewind the descriptor queue
2299 count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
2302 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2304 /* Make sure there is space in the ring for the next send. */
2305 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2307 dev_kfree_skb_any(skb);
2308 tx_ring->buffer_info[first].time_stamp = 0;
2309 tx_ring->next_to_use = first;
2312 return NETDEV_TX_OK;
2315 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2316 struct net_device *netdev)
2318 struct igbvf_adapter *adapter = netdev_priv(netdev);
2319 struct igbvf_ring *tx_ring;
2321 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2322 dev_kfree_skb_any(skb);
2323 return NETDEV_TX_OK;
2326 tx_ring = &adapter->tx_ring[0];
2328 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2332 * igbvf_tx_timeout - Respond to a Tx Hang
2333 * @netdev: network interface device structure
2335 static void igbvf_tx_timeout(struct net_device *netdev)
2337 struct igbvf_adapter *adapter = netdev_priv(netdev);
2339 /* Do the reset outside of interrupt context */
2340 adapter->tx_timeout_count++;
2341 schedule_work(&adapter->reset_task);
2344 static void igbvf_reset_task(struct work_struct *work)
2346 struct igbvf_adapter *adapter;
2347 adapter = container_of(work, struct igbvf_adapter, reset_task);
2349 igbvf_reinit_locked(adapter);
2353 * igbvf_get_stats - Get System Network Statistics
2354 * @netdev: network interface device structure
2356 * Returns the address of the device statistics structure.
2357 * The statistics are actually updated from the timer callback.
2359 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2361 struct igbvf_adapter *adapter = netdev_priv(netdev);
2363 /* only return the current stats */
2364 return &adapter->net_stats;
2368 * igbvf_change_mtu - Change the Maximum Transfer Unit
2369 * @netdev: network interface device structure
2370 * @new_mtu: new value for maximum frame size
2372 * Returns 0 on success, negative on failure
2374 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2376 struct igbvf_adapter *adapter = netdev_priv(netdev);
2377 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2379 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2380 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2384 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2385 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2386 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2390 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2392 /* igbvf_down has a dependency on max_frame_size */
2393 adapter->max_frame_size = max_frame;
2394 if (netif_running(netdev))
2395 igbvf_down(adapter);
2398 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2399 * means we reserve 2 more, this pushes us to allocate from the next
2401 * i.e. RXBUFFER_2048 --> size-4096 slab
2402 * However with the new *_jumbo_rx* routines, jumbo receives will use
2406 if (max_frame <= 1024)
2407 adapter->rx_buffer_len = 1024;
2408 else if (max_frame <= 2048)
2409 adapter->rx_buffer_len = 2048;
2411 #if (PAGE_SIZE / 2) > 16384
2412 adapter->rx_buffer_len = 16384;
2414 adapter->rx_buffer_len = PAGE_SIZE / 2;
2418 /* adjust allocation if LPE protects us, and we aren't using SBP */
2419 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2420 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2421 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2424 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2425 netdev->mtu, new_mtu);
2426 netdev->mtu = new_mtu;
2428 if (netif_running(netdev))
2431 igbvf_reset(adapter);
2433 clear_bit(__IGBVF_RESETTING, &adapter->state);
2438 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2446 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2448 struct net_device *netdev = pci_get_drvdata(pdev);
2449 struct igbvf_adapter *adapter = netdev_priv(netdev);
2454 netif_device_detach(netdev);
2456 if (netif_running(netdev)) {
2457 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2458 igbvf_down(adapter);
2459 igbvf_free_irq(adapter);
2463 retval = pci_save_state(pdev);
2468 pci_disable_device(pdev);
2474 static int igbvf_resume(struct pci_dev *pdev)
2476 struct net_device *netdev = pci_get_drvdata(pdev);
2477 struct igbvf_adapter *adapter = netdev_priv(netdev);
2480 pci_restore_state(pdev);
2481 err = pci_enable_device_mem(pdev);
2483 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2487 pci_set_master(pdev);
2489 if (netif_running(netdev)) {
2490 err = igbvf_request_irq(adapter);
2495 igbvf_reset(adapter);
2497 if (netif_running(netdev))
2500 netif_device_attach(netdev);
2506 static void igbvf_shutdown(struct pci_dev *pdev)
2508 igbvf_suspend(pdev, PMSG_SUSPEND);
2511 #ifdef CONFIG_NET_POLL_CONTROLLER
2513 * Polling 'interrupt' - used by things like netconsole to send skbs
2514 * without having to re-enable interrupts. It's not called while
2515 * the interrupt routine is executing.
2517 static void igbvf_netpoll(struct net_device *netdev)
2519 struct igbvf_adapter *adapter = netdev_priv(netdev);
2521 disable_irq(adapter->pdev->irq);
2523 igbvf_clean_tx_irq(adapter->tx_ring);
2525 enable_irq(adapter->pdev->irq);
2530 * igbvf_io_error_detected - called when PCI error is detected
2531 * @pdev: Pointer to PCI device
2532 * @state: The current pci connection state
2534 * This function is called after a PCI bus error affecting
2535 * this device has been detected.
2537 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2538 pci_channel_state_t state)
2540 struct net_device *netdev = pci_get_drvdata(pdev);
2541 struct igbvf_adapter *adapter = netdev_priv(netdev);
2543 netif_device_detach(netdev);
2545 if (state == pci_channel_io_perm_failure)
2546 return PCI_ERS_RESULT_DISCONNECT;
2548 if (netif_running(netdev))
2549 igbvf_down(adapter);
2550 pci_disable_device(pdev);
2552 /* Request a slot slot reset. */
2553 return PCI_ERS_RESULT_NEED_RESET;
2557 * igbvf_io_slot_reset - called after the pci bus has been reset.
2558 * @pdev: Pointer to PCI device
2560 * Restart the card from scratch, as if from a cold-boot. Implementation
2561 * resembles the first-half of the igbvf_resume routine.
2563 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2565 struct net_device *netdev = pci_get_drvdata(pdev);
2566 struct igbvf_adapter *adapter = netdev_priv(netdev);
2568 if (pci_enable_device_mem(pdev)) {
2570 "Cannot re-enable PCI device after reset.\n");
2571 return PCI_ERS_RESULT_DISCONNECT;
2573 pci_set_master(pdev);
2575 igbvf_reset(adapter);
2577 return PCI_ERS_RESULT_RECOVERED;
2581 * igbvf_io_resume - called when traffic can start flowing again.
2582 * @pdev: Pointer to PCI device
2584 * This callback is called when the error recovery driver tells us that
2585 * its OK to resume normal operation. Implementation resembles the
2586 * second-half of the igbvf_resume routine.
2588 static void igbvf_io_resume(struct pci_dev *pdev)
2590 struct net_device *netdev = pci_get_drvdata(pdev);
2591 struct igbvf_adapter *adapter = netdev_priv(netdev);
2593 if (netif_running(netdev)) {
2594 if (igbvf_up(adapter)) {
2596 "can't bring device back up after reset\n");
2601 netif_device_attach(netdev);
2604 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2606 struct e1000_hw *hw = &adapter->hw;
2607 struct net_device *netdev = adapter->netdev;
2608 struct pci_dev *pdev = adapter->pdev;
2610 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2611 dev_info(&pdev->dev, "Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
2613 netdev->dev_addr[0], netdev->dev_addr[1],
2614 netdev->dev_addr[2], netdev->dev_addr[3],
2615 netdev->dev_addr[4], netdev->dev_addr[5]);
2616 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
2619 static const struct net_device_ops igbvf_netdev_ops = {
2620 .ndo_open = igbvf_open,
2621 .ndo_stop = igbvf_close,
2622 .ndo_start_xmit = igbvf_xmit_frame,
2623 .ndo_get_stats = igbvf_get_stats,
2624 .ndo_set_multicast_list = igbvf_set_multi,
2625 .ndo_set_mac_address = igbvf_set_mac,
2626 .ndo_change_mtu = igbvf_change_mtu,
2627 .ndo_do_ioctl = igbvf_ioctl,
2628 .ndo_tx_timeout = igbvf_tx_timeout,
2629 .ndo_vlan_rx_register = igbvf_vlan_rx_register,
2630 .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid,
2631 .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid,
2632 #ifdef CONFIG_NET_POLL_CONTROLLER
2633 .ndo_poll_controller = igbvf_netpoll,
2638 * igbvf_probe - Device Initialization Routine
2639 * @pdev: PCI device information struct
2640 * @ent: entry in igbvf_pci_tbl
2642 * Returns 0 on success, negative on failure
2644 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2645 * The OS initialization, configuring of the adapter private structure,
2646 * and a hardware reset occur.
2648 static int __devinit igbvf_probe(struct pci_dev *pdev,
2649 const struct pci_device_id *ent)
2651 struct net_device *netdev;
2652 struct igbvf_adapter *adapter;
2653 struct e1000_hw *hw;
2654 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2656 static int cards_found;
2657 int err, pci_using_dac;
2659 err = pci_enable_device_mem(pdev);
2664 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2666 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2670 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2672 err = pci_set_consistent_dma_mask(pdev,
2675 dev_err(&pdev->dev, "No usable DMA "
2676 "configuration, aborting\n");
2682 err = pci_request_regions(pdev, igbvf_driver_name);
2686 pci_set_master(pdev);
2689 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2691 goto err_alloc_etherdev;
2693 SET_NETDEV_DEV(netdev, &pdev->dev);
2695 pci_set_drvdata(pdev, netdev);
2696 adapter = netdev_priv(netdev);
2698 adapter->netdev = netdev;
2699 adapter->pdev = pdev;
2701 adapter->pba = ei->pba;
2702 adapter->flags = ei->flags;
2703 adapter->hw.back = adapter;
2704 adapter->hw.mac.type = ei->mac;
2705 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
2707 /* PCI config space info */
2709 hw->vendor_id = pdev->vendor;
2710 hw->device_id = pdev->device;
2711 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2712 hw->subsystem_device_id = pdev->subsystem_device;
2714 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2717 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2718 pci_resource_len(pdev, 0));
2720 if (!adapter->hw.hw_addr)
2723 if (ei->get_variants) {
2724 err = ei->get_variants(adapter);
2729 /* setup adapter struct */
2730 err = igbvf_sw_init(adapter);
2734 /* construct the net_device struct */
2735 netdev->netdev_ops = &igbvf_netdev_ops;
2737 igbvf_set_ethtool_ops(netdev);
2738 netdev->watchdog_timeo = 5 * HZ;
2739 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2741 adapter->bd_number = cards_found++;
2743 netdev->features = NETIF_F_SG |
2745 NETIF_F_HW_VLAN_TX |
2746 NETIF_F_HW_VLAN_RX |
2747 NETIF_F_HW_VLAN_FILTER;
2749 netdev->features |= NETIF_F_IPV6_CSUM;
2750 netdev->features |= NETIF_F_TSO;
2751 netdev->features |= NETIF_F_TSO6;
2754 netdev->features |= NETIF_F_HIGHDMA;
2756 netdev->vlan_features |= NETIF_F_TSO;
2757 netdev->vlan_features |= NETIF_F_TSO6;
2758 netdev->vlan_features |= NETIF_F_IP_CSUM;
2759 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2760 netdev->vlan_features |= NETIF_F_SG;
2762 /*reset the controller to put the device in a known good state */
2763 err = hw->mac.ops.reset_hw(hw);
2765 dev_info(&pdev->dev,
2766 "PF still in reset state, assigning new address\n");
2767 random_ether_addr(hw->mac.addr);
2769 err = hw->mac.ops.read_mac_addr(hw);
2771 dev_err(&pdev->dev, "Error reading MAC address\n");
2776 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2777 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2779 if (!is_valid_ether_addr(netdev->perm_addr)) {
2780 dev_err(&pdev->dev, "Invalid MAC Address: "
2781 "%02x:%02x:%02x:%02x:%02x:%02x\n",
2782 netdev->dev_addr[0], netdev->dev_addr[1],
2783 netdev->dev_addr[2], netdev->dev_addr[3],
2784 netdev->dev_addr[4], netdev->dev_addr[5]);
2789 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2790 (unsigned long) adapter);
2792 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2793 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2795 /* ring size defaults */
2796 adapter->rx_ring->count = 1024;
2797 adapter->tx_ring->count = 1024;
2799 /* reset the hardware with the new settings */
2800 igbvf_reset(adapter);
2802 /* tell the stack to leave us alone until igbvf_open() is called */
2803 netif_carrier_off(netdev);
2804 netif_stop_queue(netdev);
2806 strcpy(netdev->name, "eth%d");
2807 err = register_netdev(netdev);
2811 igbvf_print_device_info(adapter);
2813 igbvf_initialize_last_counter_stats(adapter);
2818 kfree(adapter->tx_ring);
2819 kfree(adapter->rx_ring);
2821 igbvf_reset_interrupt_capability(adapter);
2822 iounmap(adapter->hw.hw_addr);
2824 free_netdev(netdev);
2826 pci_release_regions(pdev);
2829 pci_disable_device(pdev);
2834 * igbvf_remove - Device Removal Routine
2835 * @pdev: PCI device information struct
2837 * igbvf_remove is called by the PCI subsystem to alert the driver
2838 * that it should release a PCI device. The could be caused by a
2839 * Hot-Plug event, or because the driver is going to be removed from
2842 static void __devexit igbvf_remove(struct pci_dev *pdev)
2844 struct net_device *netdev = pci_get_drvdata(pdev);
2845 struct igbvf_adapter *adapter = netdev_priv(netdev);
2846 struct e1000_hw *hw = &adapter->hw;
2849 * flush_scheduled work may reschedule our watchdog task, so
2850 * explicitly disable watchdog tasks from being rescheduled
2852 set_bit(__IGBVF_DOWN, &adapter->state);
2853 del_timer_sync(&adapter->watchdog_timer);
2855 flush_scheduled_work();
2857 unregister_netdev(netdev);
2859 igbvf_reset_interrupt_capability(adapter);
2862 * it is important to delete the napi struct prior to freeing the
2863 * rx ring so that you do not end up with null pointer refs
2865 netif_napi_del(&adapter->rx_ring->napi);
2866 kfree(adapter->tx_ring);
2867 kfree(adapter->rx_ring);
2869 iounmap(hw->hw_addr);
2870 if (hw->flash_address)
2871 iounmap(hw->flash_address);
2872 pci_release_regions(pdev);
2874 free_netdev(netdev);
2876 pci_disable_device(pdev);
2879 /* PCI Error Recovery (ERS) */
2880 static struct pci_error_handlers igbvf_err_handler = {
2881 .error_detected = igbvf_io_error_detected,
2882 .slot_reset = igbvf_io_slot_reset,
2883 .resume = igbvf_io_resume,
2886 static struct pci_device_id igbvf_pci_tbl[] = {
2887 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2888 { } /* terminate list */
2890 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2892 /* PCI Device API Driver */
2893 static struct pci_driver igbvf_driver = {
2894 .name = igbvf_driver_name,
2895 .id_table = igbvf_pci_tbl,
2896 .probe = igbvf_probe,
2897 .remove = __devexit_p(igbvf_remove),
2899 /* Power Management Hooks */
2900 .suspend = igbvf_suspend,
2901 .resume = igbvf_resume,
2903 .shutdown = igbvf_shutdown,
2904 .err_handler = &igbvf_err_handler
2908 * igbvf_init_module - Driver Registration Routine
2910 * igbvf_init_module is the first routine called when the driver is
2911 * loaded. All it does is register with the PCI subsystem.
2913 static int __init igbvf_init_module(void)
2916 printk(KERN_INFO "%s - version %s\n",
2917 igbvf_driver_string, igbvf_driver_version);
2918 printk(KERN_INFO "%s\n", igbvf_copyright);
2920 ret = pci_register_driver(&igbvf_driver);
2921 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name,
2922 PM_QOS_DEFAULT_VALUE);
2926 module_init(igbvf_init_module);
2929 * igbvf_exit_module - Driver Exit Cleanup Routine
2931 * igbvf_exit_module is called just before the driver is removed
2934 static void __exit igbvf_exit_module(void)
2936 pci_unregister_driver(&igbvf_driver);
2937 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name);
2939 module_exit(igbvf_exit_module);
2942 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2943 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2944 MODULE_LICENSE("GPL");
2945 MODULE_VERSION(DRV_VERSION);