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;
1310 * igbvf_setup_srrctl - configure the receive control registers
1311 * @adapter: Board private structure
1313 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1315 struct e1000_hw *hw = &adapter->hw;
1318 srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1319 E1000_SRRCTL_BSIZEHDR_MASK |
1320 E1000_SRRCTL_BSIZEPKT_MASK);
1322 /* Enable queue drop to avoid head of line blocking */
1323 srrctl |= E1000_SRRCTL_DROP_EN;
1325 /* Setup buffer sizes */
1326 srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1327 E1000_SRRCTL_BSIZEPKT_SHIFT;
1329 if (adapter->rx_buffer_len < 2048) {
1330 adapter->rx_ps_hdr_size = 0;
1331 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1333 adapter->rx_ps_hdr_size = 128;
1334 srrctl |= adapter->rx_ps_hdr_size <<
1335 E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1336 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1339 ew32(SRRCTL(0), srrctl);
1343 * igbvf_configure_rx - Configure Receive Unit after Reset
1344 * @adapter: board private structure
1346 * Configure the Rx unit of the MAC after a reset.
1348 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1350 struct e1000_hw *hw = &adapter->hw;
1351 struct igbvf_ring *rx_ring = adapter->rx_ring;
1355 /* disable receives */
1356 rxdctl = er32(RXDCTL(0));
1357 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1360 rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1363 * Setup the HW Rx Head and Tail Descriptor Pointers and
1364 * the Base and Length of the Rx Descriptor Ring
1366 rdba = rx_ring->dma;
1367 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1368 ew32(RDBAH(0), (rdba >> 32));
1369 ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1370 rx_ring->head = E1000_RDH(0);
1371 rx_ring->tail = E1000_RDT(0);
1375 rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1376 rxdctl &= 0xFFF00000;
1377 rxdctl |= IGBVF_RX_PTHRESH;
1378 rxdctl |= IGBVF_RX_HTHRESH << 8;
1379 rxdctl |= IGBVF_RX_WTHRESH << 16;
1381 igbvf_set_rlpml(adapter);
1383 /* enable receives */
1384 ew32(RXDCTL(0), rxdctl);
1388 * igbvf_set_multi - Multicast and Promiscuous mode set
1389 * @netdev: network interface device structure
1391 * The set_multi entry point is called whenever the multicast address
1392 * list or the network interface flags are updated. This routine is
1393 * responsible for configuring the hardware for proper multicast,
1394 * promiscuous mode, and all-multi behavior.
1396 static void igbvf_set_multi(struct net_device *netdev)
1398 struct igbvf_adapter *adapter = netdev_priv(netdev);
1399 struct e1000_hw *hw = &adapter->hw;
1400 struct dev_mc_list *mc_ptr;
1401 u8 *mta_list = NULL;
1404 if (!netdev_mc_empty(netdev)) {
1405 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
1407 dev_err(&adapter->pdev->dev,
1408 "failed to allocate multicast filter list\n");
1413 /* prepare a packed array of only addresses. */
1415 netdev_for_each_mc_addr(mc_ptr, netdev)
1416 memcpy(mta_list + (i++ * ETH_ALEN), mc_ptr->dmi_addr, ETH_ALEN);
1418 hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1423 * igbvf_configure - configure the hardware for Rx and Tx
1424 * @adapter: private board structure
1426 static void igbvf_configure(struct igbvf_adapter *adapter)
1428 igbvf_set_multi(adapter->netdev);
1430 igbvf_restore_vlan(adapter);
1432 igbvf_configure_tx(adapter);
1433 igbvf_setup_srrctl(adapter);
1434 igbvf_configure_rx(adapter);
1435 igbvf_alloc_rx_buffers(adapter->rx_ring,
1436 igbvf_desc_unused(adapter->rx_ring));
1439 /* igbvf_reset - bring the hardware into a known good state
1441 * This function boots the hardware and enables some settings that
1442 * require a configuration cycle of the hardware - those cannot be
1443 * set/changed during runtime. After reset the device needs to be
1444 * properly configured for Rx, Tx etc.
1446 static void igbvf_reset(struct igbvf_adapter *adapter)
1448 struct e1000_mac_info *mac = &adapter->hw.mac;
1449 struct net_device *netdev = adapter->netdev;
1450 struct e1000_hw *hw = &adapter->hw;
1452 /* Allow time for pending master requests to run */
1453 if (mac->ops.reset_hw(hw))
1454 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1456 mac->ops.init_hw(hw);
1458 if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1459 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1461 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1465 adapter->last_reset = jiffies;
1468 int igbvf_up(struct igbvf_adapter *adapter)
1470 struct e1000_hw *hw = &adapter->hw;
1472 /* hardware has been reset, we need to reload some things */
1473 igbvf_configure(adapter);
1475 clear_bit(__IGBVF_DOWN, &adapter->state);
1477 napi_enable(&adapter->rx_ring->napi);
1478 if (adapter->msix_entries)
1479 igbvf_configure_msix(adapter);
1481 /* Clear any pending interrupts. */
1483 igbvf_irq_enable(adapter);
1485 /* start the watchdog */
1486 hw->mac.get_link_status = 1;
1487 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1493 void igbvf_down(struct igbvf_adapter *adapter)
1495 struct net_device *netdev = adapter->netdev;
1496 struct e1000_hw *hw = &adapter->hw;
1500 * signal that we're down so the interrupt handler does not
1501 * reschedule our watchdog timer
1503 set_bit(__IGBVF_DOWN, &adapter->state);
1505 /* disable receives in the hardware */
1506 rxdctl = er32(RXDCTL(0));
1507 ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1509 netif_stop_queue(netdev);
1511 /* disable transmits in the hardware */
1512 txdctl = er32(TXDCTL(0));
1513 ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1515 /* flush both disables and wait for them to finish */
1519 napi_disable(&adapter->rx_ring->napi);
1521 igbvf_irq_disable(adapter);
1523 del_timer_sync(&adapter->watchdog_timer);
1525 netif_carrier_off(netdev);
1527 /* record the stats before reset*/
1528 igbvf_update_stats(adapter);
1530 adapter->link_speed = 0;
1531 adapter->link_duplex = 0;
1533 igbvf_reset(adapter);
1534 igbvf_clean_tx_ring(adapter->tx_ring);
1535 igbvf_clean_rx_ring(adapter->rx_ring);
1538 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1541 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1543 igbvf_down(adapter);
1545 clear_bit(__IGBVF_RESETTING, &adapter->state);
1549 * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1550 * @adapter: board private structure to initialize
1552 * igbvf_sw_init initializes the Adapter private data structure.
1553 * Fields are initialized based on PCI device information and
1554 * OS network device settings (MTU size).
1556 static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
1558 struct net_device *netdev = adapter->netdev;
1561 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1562 adapter->rx_ps_hdr_size = 0;
1563 adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1564 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1566 adapter->tx_int_delay = 8;
1567 adapter->tx_abs_int_delay = 32;
1568 adapter->rx_int_delay = 0;
1569 adapter->rx_abs_int_delay = 8;
1570 adapter->itr_setting = 3;
1571 adapter->itr = 20000;
1573 /* Set various function pointers */
1574 adapter->ei->init_ops(&adapter->hw);
1576 rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1580 rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1584 igbvf_set_interrupt_capability(adapter);
1586 if (igbvf_alloc_queues(adapter))
1589 spin_lock_init(&adapter->tx_queue_lock);
1591 /* Explicitly disable IRQ since the NIC can be in any state. */
1592 igbvf_irq_disable(adapter);
1594 spin_lock_init(&adapter->stats_lock);
1596 set_bit(__IGBVF_DOWN, &adapter->state);
1600 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1602 struct e1000_hw *hw = &adapter->hw;
1604 adapter->stats.last_gprc = er32(VFGPRC);
1605 adapter->stats.last_gorc = er32(VFGORC);
1606 adapter->stats.last_gptc = er32(VFGPTC);
1607 adapter->stats.last_gotc = er32(VFGOTC);
1608 adapter->stats.last_mprc = er32(VFMPRC);
1609 adapter->stats.last_gotlbc = er32(VFGOTLBC);
1610 adapter->stats.last_gptlbc = er32(VFGPTLBC);
1611 adapter->stats.last_gorlbc = er32(VFGORLBC);
1612 adapter->stats.last_gprlbc = er32(VFGPRLBC);
1614 adapter->stats.base_gprc = er32(VFGPRC);
1615 adapter->stats.base_gorc = er32(VFGORC);
1616 adapter->stats.base_gptc = er32(VFGPTC);
1617 adapter->stats.base_gotc = er32(VFGOTC);
1618 adapter->stats.base_mprc = er32(VFMPRC);
1619 adapter->stats.base_gotlbc = er32(VFGOTLBC);
1620 adapter->stats.base_gptlbc = er32(VFGPTLBC);
1621 adapter->stats.base_gorlbc = er32(VFGORLBC);
1622 adapter->stats.base_gprlbc = er32(VFGPRLBC);
1626 * igbvf_open - Called when a network interface is made active
1627 * @netdev: network interface device structure
1629 * Returns 0 on success, negative value on failure
1631 * The open entry point is called when a network interface is made
1632 * active by the system (IFF_UP). At this point all resources needed
1633 * for transmit and receive operations are allocated, the interrupt
1634 * handler is registered with the OS, the watchdog timer is started,
1635 * and the stack is notified that the interface is ready.
1637 static int igbvf_open(struct net_device *netdev)
1639 struct igbvf_adapter *adapter = netdev_priv(netdev);
1640 struct e1000_hw *hw = &adapter->hw;
1643 /* disallow open during test */
1644 if (test_bit(__IGBVF_TESTING, &adapter->state))
1647 /* allocate transmit descriptors */
1648 err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1652 /* allocate receive descriptors */
1653 err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1658 * before we allocate an interrupt, we must be ready to handle it.
1659 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1660 * as soon as we call pci_request_irq, so we have to setup our
1661 * clean_rx handler before we do so.
1663 igbvf_configure(adapter);
1665 err = igbvf_request_irq(adapter);
1669 /* From here on the code is the same as igbvf_up() */
1670 clear_bit(__IGBVF_DOWN, &adapter->state);
1672 napi_enable(&adapter->rx_ring->napi);
1674 /* clear any pending interrupts */
1677 igbvf_irq_enable(adapter);
1679 /* start the watchdog */
1680 hw->mac.get_link_status = 1;
1681 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1686 igbvf_free_rx_resources(adapter->rx_ring);
1688 igbvf_free_tx_resources(adapter->tx_ring);
1690 igbvf_reset(adapter);
1696 * igbvf_close - Disables a network interface
1697 * @netdev: network interface device structure
1699 * Returns 0, this is not allowed to fail
1701 * The close entry point is called when an interface is de-activated
1702 * by the OS. The hardware is still under the drivers control, but
1703 * needs to be disabled. A global MAC reset is issued to stop the
1704 * hardware, and all transmit and receive resources are freed.
1706 static int igbvf_close(struct net_device *netdev)
1708 struct igbvf_adapter *adapter = netdev_priv(netdev);
1710 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1711 igbvf_down(adapter);
1713 igbvf_free_irq(adapter);
1715 igbvf_free_tx_resources(adapter->tx_ring);
1716 igbvf_free_rx_resources(adapter->rx_ring);
1721 * igbvf_set_mac - Change the Ethernet Address of the NIC
1722 * @netdev: network interface device structure
1723 * @p: pointer to an address structure
1725 * Returns 0 on success, negative on failure
1727 static int igbvf_set_mac(struct net_device *netdev, void *p)
1729 struct igbvf_adapter *adapter = netdev_priv(netdev);
1730 struct e1000_hw *hw = &adapter->hw;
1731 struct sockaddr *addr = p;
1733 if (!is_valid_ether_addr(addr->sa_data))
1734 return -EADDRNOTAVAIL;
1736 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1738 hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1740 if (memcmp(addr->sa_data, hw->mac.addr, 6))
1741 return -EADDRNOTAVAIL;
1743 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1748 #define UPDATE_VF_COUNTER(reg, name) \
1750 u32 current_counter = er32(reg); \
1751 if (current_counter < adapter->stats.last_##name) \
1752 adapter->stats.name += 0x100000000LL; \
1753 adapter->stats.last_##name = current_counter; \
1754 adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1755 adapter->stats.name |= current_counter; \
1759 * igbvf_update_stats - Update the board statistics counters
1760 * @adapter: board private structure
1762 void igbvf_update_stats(struct igbvf_adapter *adapter)
1764 struct e1000_hw *hw = &adapter->hw;
1765 struct pci_dev *pdev = adapter->pdev;
1768 * Prevent stats update while adapter is being reset, link is down
1769 * or if the pci connection is down.
1771 if (adapter->link_speed == 0)
1774 if (test_bit(__IGBVF_RESETTING, &adapter->state))
1777 if (pci_channel_offline(pdev))
1780 UPDATE_VF_COUNTER(VFGPRC, gprc);
1781 UPDATE_VF_COUNTER(VFGORC, gorc);
1782 UPDATE_VF_COUNTER(VFGPTC, gptc);
1783 UPDATE_VF_COUNTER(VFGOTC, gotc);
1784 UPDATE_VF_COUNTER(VFMPRC, mprc);
1785 UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1786 UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1787 UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1788 UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1790 /* Fill out the OS statistics structure */
1791 adapter->net_stats.multicast = adapter->stats.mprc;
1794 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1796 dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n",
1797 adapter->link_speed,
1798 ((adapter->link_duplex == FULL_DUPLEX) ?
1799 "Full Duplex" : "Half Duplex"));
1802 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1804 struct e1000_hw *hw = &adapter->hw;
1805 s32 ret_val = E1000_SUCCESS;
1808 /* If interface is down, stay link down */
1809 if (test_bit(__IGBVF_DOWN, &adapter->state))
1812 ret_val = hw->mac.ops.check_for_link(hw);
1813 link_active = !hw->mac.get_link_status;
1815 /* if check for link returns error we will need to reset */
1816 if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1817 schedule_work(&adapter->reset_task);
1823 * igbvf_watchdog - Timer Call-back
1824 * @data: pointer to adapter cast into an unsigned long
1826 static void igbvf_watchdog(unsigned long data)
1828 struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
1830 /* Do the rest outside of interrupt context */
1831 schedule_work(&adapter->watchdog_task);
1834 static void igbvf_watchdog_task(struct work_struct *work)
1836 struct igbvf_adapter *adapter = container_of(work,
1837 struct igbvf_adapter,
1839 struct net_device *netdev = adapter->netdev;
1840 struct e1000_mac_info *mac = &adapter->hw.mac;
1841 struct igbvf_ring *tx_ring = adapter->tx_ring;
1842 struct e1000_hw *hw = &adapter->hw;
1846 link = igbvf_has_link(adapter);
1849 if (!netif_carrier_ok(netdev)) {
1852 mac->ops.get_link_up_info(&adapter->hw,
1853 &adapter->link_speed,
1854 &adapter->link_duplex);
1855 igbvf_print_link_info(adapter);
1857 /* adjust timeout factor according to speed/duplex */
1858 adapter->tx_timeout_factor = 1;
1859 switch (adapter->link_speed) {
1862 adapter->tx_timeout_factor = 16;
1866 /* maybe add some timeout factor ? */
1870 netif_carrier_on(netdev);
1871 netif_wake_queue(netdev);
1874 if (netif_carrier_ok(netdev)) {
1875 adapter->link_speed = 0;
1876 adapter->link_duplex = 0;
1877 dev_info(&adapter->pdev->dev, "Link is Down\n");
1878 netif_carrier_off(netdev);
1879 netif_stop_queue(netdev);
1883 if (netif_carrier_ok(netdev)) {
1884 igbvf_update_stats(adapter);
1886 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1890 * We've lost link, so the controller stops DMA,
1891 * but we've got queued Tx work that's never going
1892 * to get done, so reset controller to flush Tx.
1893 * (Do the reset outside of interrupt context).
1895 adapter->tx_timeout_count++;
1896 schedule_work(&adapter->reset_task);
1900 /* Cause software interrupt to ensure Rx ring is cleaned */
1901 ew32(EICS, adapter->rx_ring->eims_value);
1903 /* Force detection of hung controller every watchdog period */
1904 adapter->detect_tx_hung = 1;
1906 /* Reset the timer */
1907 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1908 mod_timer(&adapter->watchdog_timer,
1909 round_jiffies(jiffies + (2 * HZ)));
1912 #define IGBVF_TX_FLAGS_CSUM 0x00000001
1913 #define IGBVF_TX_FLAGS_VLAN 0x00000002
1914 #define IGBVF_TX_FLAGS_TSO 0x00000004
1915 #define IGBVF_TX_FLAGS_IPV4 0x00000008
1916 #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000
1917 #define IGBVF_TX_FLAGS_VLAN_SHIFT 16
1919 static int igbvf_tso(struct igbvf_adapter *adapter,
1920 struct igbvf_ring *tx_ring,
1921 struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1923 struct e1000_adv_tx_context_desc *context_desc;
1926 struct igbvf_buffer *buffer_info;
1927 u32 info = 0, tu_cmd = 0;
1928 u32 mss_l4len_idx, l4len;
1931 if (skb_header_cloned(skb)) {
1932 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1934 dev_err(&adapter->pdev->dev,
1935 "igbvf_tso returning an error\n");
1940 l4len = tcp_hdrlen(skb);
1943 if (skb->protocol == htons(ETH_P_IP)) {
1944 struct iphdr *iph = ip_hdr(skb);
1947 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1951 } else if (skb_is_gso_v6(skb)) {
1952 ipv6_hdr(skb)->payload_len = 0;
1953 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1954 &ipv6_hdr(skb)->daddr,
1958 i = tx_ring->next_to_use;
1960 buffer_info = &tx_ring->buffer_info[i];
1961 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1962 /* VLAN MACLEN IPLEN */
1963 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1964 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1965 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1966 *hdr_len += skb_network_offset(skb);
1967 info |= (skb_transport_header(skb) - skb_network_header(skb));
1968 *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1969 context_desc->vlan_macip_lens = cpu_to_le32(info);
1971 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1972 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1974 if (skb->protocol == htons(ETH_P_IP))
1975 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1976 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1978 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1981 mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1982 mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1984 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1985 context_desc->seqnum_seed = 0;
1987 buffer_info->time_stamp = jiffies;
1988 buffer_info->next_to_watch = i;
1989 buffer_info->dma = 0;
1991 if (i == tx_ring->count)
1994 tx_ring->next_to_use = i;
1999 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
2000 struct igbvf_ring *tx_ring,
2001 struct sk_buff *skb, u32 tx_flags)
2003 struct e1000_adv_tx_context_desc *context_desc;
2005 struct igbvf_buffer *buffer_info;
2006 u32 info = 0, tu_cmd = 0;
2008 if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
2009 (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
2010 i = tx_ring->next_to_use;
2011 buffer_info = &tx_ring->buffer_info[i];
2012 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
2014 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2015 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
2017 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2018 if (skb->ip_summed == CHECKSUM_PARTIAL)
2019 info |= (skb_transport_header(skb) -
2020 skb_network_header(skb));
2023 context_desc->vlan_macip_lens = cpu_to_le32(info);
2025 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2027 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2028 switch (skb->protocol) {
2029 case __constant_htons(ETH_P_IP):
2030 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
2031 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2032 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2034 case __constant_htons(ETH_P_IPV6):
2035 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2036 tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2043 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2044 context_desc->seqnum_seed = 0;
2045 context_desc->mss_l4len_idx = 0;
2047 buffer_info->time_stamp = jiffies;
2048 buffer_info->next_to_watch = i;
2049 buffer_info->dma = 0;
2051 if (i == tx_ring->count)
2053 tx_ring->next_to_use = i;
2061 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2063 struct igbvf_adapter *adapter = netdev_priv(netdev);
2065 /* there is enough descriptors then we don't need to worry */
2066 if (igbvf_desc_unused(adapter->tx_ring) >= size)
2069 netif_stop_queue(netdev);
2073 /* We need to check again just in case room has been made available */
2074 if (igbvf_desc_unused(adapter->tx_ring) < size)
2077 netif_wake_queue(netdev);
2079 ++adapter->restart_queue;
2083 #define IGBVF_MAX_TXD_PWR 16
2084 #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR)
2086 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2087 struct igbvf_ring *tx_ring,
2088 struct sk_buff *skb,
2091 struct igbvf_buffer *buffer_info;
2092 struct pci_dev *pdev = adapter->pdev;
2093 unsigned int len = skb_headlen(skb);
2094 unsigned int count = 0, i;
2097 i = tx_ring->next_to_use;
2099 buffer_info = &tx_ring->buffer_info[i];
2100 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2101 buffer_info->length = len;
2102 /* set time_stamp *before* dma to help avoid a possible race */
2103 buffer_info->time_stamp = jiffies;
2104 buffer_info->next_to_watch = i;
2105 buffer_info->mapped_as_page = false;
2106 buffer_info->dma = pci_map_single(pdev, skb->data, len,
2108 if (pci_dma_mapping_error(pdev, buffer_info->dma))
2112 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2113 struct skb_frag_struct *frag;
2117 if (i == tx_ring->count)
2120 frag = &skb_shinfo(skb)->frags[f];
2123 buffer_info = &tx_ring->buffer_info[i];
2124 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2125 buffer_info->length = len;
2126 buffer_info->time_stamp = jiffies;
2127 buffer_info->next_to_watch = i;
2128 buffer_info->mapped_as_page = true;
2129 buffer_info->dma = pci_map_page(pdev,
2134 if (pci_dma_mapping_error(pdev, buffer_info->dma))
2138 tx_ring->buffer_info[i].skb = skb;
2139 tx_ring->buffer_info[first].next_to_watch = i;
2144 dev_err(&pdev->dev, "TX DMA map failed\n");
2146 /* clear timestamp and dma mappings for failed buffer_info mapping */
2147 buffer_info->dma = 0;
2148 buffer_info->time_stamp = 0;
2149 buffer_info->length = 0;
2150 buffer_info->next_to_watch = 0;
2151 buffer_info->mapped_as_page = false;
2155 /* clear timestamp and dma mappings for remaining portion of packet */
2158 i += tx_ring->count;
2160 buffer_info = &tx_ring->buffer_info[i];
2161 igbvf_put_txbuf(adapter, buffer_info);
2167 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2168 struct igbvf_ring *tx_ring,
2169 int tx_flags, int count, u32 paylen,
2172 union e1000_adv_tx_desc *tx_desc = NULL;
2173 struct igbvf_buffer *buffer_info;
2174 u32 olinfo_status = 0, cmd_type_len;
2177 cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2178 E1000_ADVTXD_DCMD_DEXT);
2180 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2181 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2183 if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2184 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2186 /* insert tcp checksum */
2187 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2189 /* insert ip checksum */
2190 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2191 olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2193 } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2194 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2197 olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2199 i = tx_ring->next_to_use;
2201 buffer_info = &tx_ring->buffer_info[i];
2202 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2203 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2204 tx_desc->read.cmd_type_len =
2205 cpu_to_le32(cmd_type_len | buffer_info->length);
2206 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2208 if (i == tx_ring->count)
2212 tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2213 /* Force memory writes to complete before letting h/w
2214 * know there are new descriptors to fetch. (Only
2215 * applicable for weak-ordered memory model archs,
2216 * such as IA-64). */
2219 tx_ring->next_to_use = i;
2220 writel(i, adapter->hw.hw_addr + tx_ring->tail);
2221 /* we need this if more than one processor can write to our tail
2222 * at a time, it syncronizes IO on IA64/Altix systems */
2226 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2227 struct net_device *netdev,
2228 struct igbvf_ring *tx_ring)
2230 struct igbvf_adapter *adapter = netdev_priv(netdev);
2231 unsigned int first, tx_flags = 0;
2236 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2237 dev_kfree_skb_any(skb);
2238 return NETDEV_TX_OK;
2241 if (skb->len <= 0) {
2242 dev_kfree_skb_any(skb);
2243 return NETDEV_TX_OK;
2247 * need: count + 4 desc gap to keep tail from touching
2248 * + 2 desc gap to keep tail from touching head,
2249 * + 1 desc for skb->data,
2250 * + 1 desc for context descriptor,
2251 * head, otherwise try next time
2253 if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2254 /* this is a hard error */
2255 return NETDEV_TX_BUSY;
2258 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2259 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2260 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
2263 if (skb->protocol == htons(ETH_P_IP))
2264 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2266 first = tx_ring->next_to_use;
2268 tso = skb_is_gso(skb) ?
2269 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
2270 if (unlikely(tso < 0)) {
2271 dev_kfree_skb_any(skb);
2272 return NETDEV_TX_OK;
2276 tx_flags |= IGBVF_TX_FLAGS_TSO;
2277 else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2278 (skb->ip_summed == CHECKSUM_PARTIAL))
2279 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2282 * count reflects descriptors mapped, if 0 then mapping error
2283 * has occured and we need to rewind the descriptor queue
2285 count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
2288 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2290 /* Make sure there is space in the ring for the next send. */
2291 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2293 dev_kfree_skb_any(skb);
2294 tx_ring->buffer_info[first].time_stamp = 0;
2295 tx_ring->next_to_use = first;
2298 return NETDEV_TX_OK;
2301 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2302 struct net_device *netdev)
2304 struct igbvf_adapter *adapter = netdev_priv(netdev);
2305 struct igbvf_ring *tx_ring;
2307 if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2308 dev_kfree_skb_any(skb);
2309 return NETDEV_TX_OK;
2312 tx_ring = &adapter->tx_ring[0];
2314 return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2318 * igbvf_tx_timeout - Respond to a Tx Hang
2319 * @netdev: network interface device structure
2321 static void igbvf_tx_timeout(struct net_device *netdev)
2323 struct igbvf_adapter *adapter = netdev_priv(netdev);
2325 /* Do the reset outside of interrupt context */
2326 adapter->tx_timeout_count++;
2327 schedule_work(&adapter->reset_task);
2330 static void igbvf_reset_task(struct work_struct *work)
2332 struct igbvf_adapter *adapter;
2333 adapter = container_of(work, struct igbvf_adapter, reset_task);
2335 igbvf_reinit_locked(adapter);
2339 * igbvf_get_stats - Get System Network Statistics
2340 * @netdev: network interface device structure
2342 * Returns the address of the device statistics structure.
2343 * The statistics are actually updated from the timer callback.
2345 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2347 struct igbvf_adapter *adapter = netdev_priv(netdev);
2349 /* only return the current stats */
2350 return &adapter->net_stats;
2354 * igbvf_change_mtu - Change the Maximum Transfer Unit
2355 * @netdev: network interface device structure
2356 * @new_mtu: new value for maximum frame size
2358 * Returns 0 on success, negative on failure
2360 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2362 struct igbvf_adapter *adapter = netdev_priv(netdev);
2363 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2365 if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2366 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2370 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2371 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2372 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2376 while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2378 /* igbvf_down has a dependency on max_frame_size */
2379 adapter->max_frame_size = max_frame;
2380 if (netif_running(netdev))
2381 igbvf_down(adapter);
2384 * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2385 * means we reserve 2 more, this pushes us to allocate from the next
2387 * i.e. RXBUFFER_2048 --> size-4096 slab
2388 * However with the new *_jumbo_rx* routines, jumbo receives will use
2392 if (max_frame <= 1024)
2393 adapter->rx_buffer_len = 1024;
2394 else if (max_frame <= 2048)
2395 adapter->rx_buffer_len = 2048;
2397 #if (PAGE_SIZE / 2) > 16384
2398 adapter->rx_buffer_len = 16384;
2400 adapter->rx_buffer_len = PAGE_SIZE / 2;
2404 /* adjust allocation if LPE protects us, and we aren't using SBP */
2405 if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2406 (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2407 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2410 dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2411 netdev->mtu, new_mtu);
2412 netdev->mtu = new_mtu;
2414 if (netif_running(netdev))
2417 igbvf_reset(adapter);
2419 clear_bit(__IGBVF_RESETTING, &adapter->state);
2424 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2432 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2434 struct net_device *netdev = pci_get_drvdata(pdev);
2435 struct igbvf_adapter *adapter = netdev_priv(netdev);
2440 netif_device_detach(netdev);
2442 if (netif_running(netdev)) {
2443 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2444 igbvf_down(adapter);
2445 igbvf_free_irq(adapter);
2449 retval = pci_save_state(pdev);
2454 pci_disable_device(pdev);
2460 static int igbvf_resume(struct pci_dev *pdev)
2462 struct net_device *netdev = pci_get_drvdata(pdev);
2463 struct igbvf_adapter *adapter = netdev_priv(netdev);
2466 pci_restore_state(pdev);
2467 err = pci_enable_device_mem(pdev);
2469 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2473 pci_set_master(pdev);
2475 if (netif_running(netdev)) {
2476 err = igbvf_request_irq(adapter);
2481 igbvf_reset(adapter);
2483 if (netif_running(netdev))
2486 netif_device_attach(netdev);
2492 static void igbvf_shutdown(struct pci_dev *pdev)
2494 igbvf_suspend(pdev, PMSG_SUSPEND);
2497 #ifdef CONFIG_NET_POLL_CONTROLLER
2499 * Polling 'interrupt' - used by things like netconsole to send skbs
2500 * without having to re-enable interrupts. It's not called while
2501 * the interrupt routine is executing.
2503 static void igbvf_netpoll(struct net_device *netdev)
2505 struct igbvf_adapter *adapter = netdev_priv(netdev);
2507 disable_irq(adapter->pdev->irq);
2509 igbvf_clean_tx_irq(adapter->tx_ring);
2511 enable_irq(adapter->pdev->irq);
2516 * igbvf_io_error_detected - called when PCI error is detected
2517 * @pdev: Pointer to PCI device
2518 * @state: The current pci connection state
2520 * This function is called after a PCI bus error affecting
2521 * this device has been detected.
2523 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2524 pci_channel_state_t state)
2526 struct net_device *netdev = pci_get_drvdata(pdev);
2527 struct igbvf_adapter *adapter = netdev_priv(netdev);
2529 netif_device_detach(netdev);
2531 if (state == pci_channel_io_perm_failure)
2532 return PCI_ERS_RESULT_DISCONNECT;
2534 if (netif_running(netdev))
2535 igbvf_down(adapter);
2536 pci_disable_device(pdev);
2538 /* Request a slot slot reset. */
2539 return PCI_ERS_RESULT_NEED_RESET;
2543 * igbvf_io_slot_reset - called after the pci bus has been reset.
2544 * @pdev: Pointer to PCI device
2546 * Restart the card from scratch, as if from a cold-boot. Implementation
2547 * resembles the first-half of the igbvf_resume routine.
2549 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2551 struct net_device *netdev = pci_get_drvdata(pdev);
2552 struct igbvf_adapter *adapter = netdev_priv(netdev);
2554 if (pci_enable_device_mem(pdev)) {
2556 "Cannot re-enable PCI device after reset.\n");
2557 return PCI_ERS_RESULT_DISCONNECT;
2559 pci_set_master(pdev);
2561 igbvf_reset(adapter);
2563 return PCI_ERS_RESULT_RECOVERED;
2567 * igbvf_io_resume - called when traffic can start flowing again.
2568 * @pdev: Pointer to PCI device
2570 * This callback is called when the error recovery driver tells us that
2571 * its OK to resume normal operation. Implementation resembles the
2572 * second-half of the igbvf_resume routine.
2574 static void igbvf_io_resume(struct pci_dev *pdev)
2576 struct net_device *netdev = pci_get_drvdata(pdev);
2577 struct igbvf_adapter *adapter = netdev_priv(netdev);
2579 if (netif_running(netdev)) {
2580 if (igbvf_up(adapter)) {
2582 "can't bring device back up after reset\n");
2587 netif_device_attach(netdev);
2590 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2592 struct e1000_hw *hw = &adapter->hw;
2593 struct net_device *netdev = adapter->netdev;
2594 struct pci_dev *pdev = adapter->pdev;
2596 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2597 dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2598 dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
2601 static const struct net_device_ops igbvf_netdev_ops = {
2602 .ndo_open = igbvf_open,
2603 .ndo_stop = igbvf_close,
2604 .ndo_start_xmit = igbvf_xmit_frame,
2605 .ndo_get_stats = igbvf_get_stats,
2606 .ndo_set_multicast_list = igbvf_set_multi,
2607 .ndo_set_mac_address = igbvf_set_mac,
2608 .ndo_change_mtu = igbvf_change_mtu,
2609 .ndo_do_ioctl = igbvf_ioctl,
2610 .ndo_tx_timeout = igbvf_tx_timeout,
2611 .ndo_vlan_rx_register = igbvf_vlan_rx_register,
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,
2620 * igbvf_probe - Device Initialization Routine
2621 * @pdev: PCI device information struct
2622 * @ent: entry in igbvf_pci_tbl
2624 * Returns 0 on success, negative on failure
2626 * igbvf_probe initializes an adapter identified by a pci_dev structure.
2627 * The OS initialization, configuring of the adapter private structure,
2628 * and a hardware reset occur.
2630 static int __devinit igbvf_probe(struct pci_dev *pdev,
2631 const struct pci_device_id *ent)
2633 struct net_device *netdev;
2634 struct igbvf_adapter *adapter;
2635 struct e1000_hw *hw;
2636 const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2638 static int cards_found;
2639 int err, pci_using_dac;
2641 err = pci_enable_device_mem(pdev);
2646 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2648 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2652 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2654 err = pci_set_consistent_dma_mask(pdev,
2657 dev_err(&pdev->dev, "No usable DMA "
2658 "configuration, aborting\n");
2664 err = pci_request_regions(pdev, igbvf_driver_name);
2668 pci_set_master(pdev);
2671 netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2673 goto err_alloc_etherdev;
2675 SET_NETDEV_DEV(netdev, &pdev->dev);
2677 pci_set_drvdata(pdev, netdev);
2678 adapter = netdev_priv(netdev);
2680 adapter->netdev = netdev;
2681 adapter->pdev = pdev;
2683 adapter->pba = ei->pba;
2684 adapter->flags = ei->flags;
2685 adapter->hw.back = adapter;
2686 adapter->hw.mac.type = ei->mac;
2687 adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
2689 /* PCI config space info */
2691 hw->vendor_id = pdev->vendor;
2692 hw->device_id = pdev->device;
2693 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2694 hw->subsystem_device_id = pdev->subsystem_device;
2696 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2699 adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2700 pci_resource_len(pdev, 0));
2702 if (!adapter->hw.hw_addr)
2705 if (ei->get_variants) {
2706 err = ei->get_variants(adapter);
2711 /* setup adapter struct */
2712 err = igbvf_sw_init(adapter);
2716 /* construct the net_device struct */
2717 netdev->netdev_ops = &igbvf_netdev_ops;
2719 igbvf_set_ethtool_ops(netdev);
2720 netdev->watchdog_timeo = 5 * HZ;
2721 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2723 adapter->bd_number = cards_found++;
2725 netdev->features = NETIF_F_SG |
2727 NETIF_F_HW_VLAN_TX |
2728 NETIF_F_HW_VLAN_RX |
2729 NETIF_F_HW_VLAN_FILTER;
2731 netdev->features |= NETIF_F_IPV6_CSUM;
2732 netdev->features |= NETIF_F_TSO;
2733 netdev->features |= NETIF_F_TSO6;
2736 netdev->features |= NETIF_F_HIGHDMA;
2738 netdev->vlan_features |= NETIF_F_TSO;
2739 netdev->vlan_features |= NETIF_F_TSO6;
2740 netdev->vlan_features |= NETIF_F_IP_CSUM;
2741 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2742 netdev->vlan_features |= NETIF_F_SG;
2744 /*reset the controller to put the device in a known good state */
2745 err = hw->mac.ops.reset_hw(hw);
2747 dev_info(&pdev->dev,
2748 "PF still in reset state, assigning new address."
2749 " Is the PF interface up?\n");
2750 random_ether_addr(hw->mac.addr);
2752 err = hw->mac.ops.read_mac_addr(hw);
2754 dev_err(&pdev->dev, "Error reading MAC address\n");
2759 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2760 memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2762 if (!is_valid_ether_addr(netdev->perm_addr)) {
2763 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
2769 setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2770 (unsigned long) adapter);
2772 INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2773 INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2775 /* ring size defaults */
2776 adapter->rx_ring->count = 1024;
2777 adapter->tx_ring->count = 1024;
2779 /* reset the hardware with the new settings */
2780 igbvf_reset(adapter);
2782 /* tell the stack to leave us alone until igbvf_open() is called */
2783 netif_carrier_off(netdev);
2784 netif_stop_queue(netdev);
2786 strcpy(netdev->name, "eth%d");
2787 err = register_netdev(netdev);
2791 igbvf_print_device_info(adapter);
2793 igbvf_initialize_last_counter_stats(adapter);
2798 kfree(adapter->tx_ring);
2799 kfree(adapter->rx_ring);
2801 igbvf_reset_interrupt_capability(adapter);
2802 iounmap(adapter->hw.hw_addr);
2804 free_netdev(netdev);
2806 pci_release_regions(pdev);
2809 pci_disable_device(pdev);
2814 * igbvf_remove - Device Removal Routine
2815 * @pdev: PCI device information struct
2817 * igbvf_remove is called by the PCI subsystem to alert the driver
2818 * that it should release a PCI device. The could be caused by a
2819 * Hot-Plug event, or because the driver is going to be removed from
2822 static void __devexit igbvf_remove(struct pci_dev *pdev)
2824 struct net_device *netdev = pci_get_drvdata(pdev);
2825 struct igbvf_adapter *adapter = netdev_priv(netdev);
2826 struct e1000_hw *hw = &adapter->hw;
2829 * flush_scheduled work may reschedule our watchdog task, so
2830 * explicitly disable watchdog tasks from being rescheduled
2832 set_bit(__IGBVF_DOWN, &adapter->state);
2833 del_timer_sync(&adapter->watchdog_timer);
2835 flush_scheduled_work();
2837 unregister_netdev(netdev);
2839 igbvf_reset_interrupt_capability(adapter);
2842 * it is important to delete the napi struct prior to freeing the
2843 * rx ring so that you do not end up with null pointer refs
2845 netif_napi_del(&adapter->rx_ring->napi);
2846 kfree(adapter->tx_ring);
2847 kfree(adapter->rx_ring);
2849 iounmap(hw->hw_addr);
2850 if (hw->flash_address)
2851 iounmap(hw->flash_address);
2852 pci_release_regions(pdev);
2854 free_netdev(netdev);
2856 pci_disable_device(pdev);
2859 /* PCI Error Recovery (ERS) */
2860 static struct pci_error_handlers igbvf_err_handler = {
2861 .error_detected = igbvf_io_error_detected,
2862 .slot_reset = igbvf_io_slot_reset,
2863 .resume = igbvf_io_resume,
2866 static DEFINE_PCI_DEVICE_TABLE(igbvf_pci_tbl) = {
2867 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2868 { } /* terminate list */
2870 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2872 /* PCI Device API Driver */
2873 static struct pci_driver igbvf_driver = {
2874 .name = igbvf_driver_name,
2875 .id_table = igbvf_pci_tbl,
2876 .probe = igbvf_probe,
2877 .remove = __devexit_p(igbvf_remove),
2879 /* Power Management Hooks */
2880 .suspend = igbvf_suspend,
2881 .resume = igbvf_resume,
2883 .shutdown = igbvf_shutdown,
2884 .err_handler = &igbvf_err_handler
2888 * igbvf_init_module - Driver Registration Routine
2890 * igbvf_init_module is the first routine called when the driver is
2891 * loaded. All it does is register with the PCI subsystem.
2893 static int __init igbvf_init_module(void)
2896 printk(KERN_INFO "%s - version %s\n",
2897 igbvf_driver_string, igbvf_driver_version);
2898 printk(KERN_INFO "%s\n", igbvf_copyright);
2900 ret = pci_register_driver(&igbvf_driver);
2901 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name,
2902 PM_QOS_DEFAULT_VALUE);
2906 module_init(igbvf_init_module);
2909 * igbvf_exit_module - Driver Exit Cleanup Routine
2911 * igbvf_exit_module is called just before the driver is removed
2914 static void __exit igbvf_exit_module(void)
2916 pci_unregister_driver(&igbvf_driver);
2917 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name);
2919 module_exit(igbvf_exit_module);
2922 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2923 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2924 MODULE_LICENSE("GPL");
2925 MODULE_VERSION(DRV_VERSION);