2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/errno.h>
24 #include <linux/types.h>
25 #include <linux/init.h>
26 #include <linux/workqueue.h>
27 #include <linux/pci.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/if_ether.h>
31 #include <linux/if_vlan.h>
32 #include <linux/ethtool.h>
35 #include <linux/ipv6.h>
36 #include <linux/tcp.h>
37 #include <linux/rtnetlink.h>
38 #include <net/ip6_checksum.h>
40 #include "cq_enet_desc.h"
42 #include "vnic_intr.h"
43 #include "vnic_stats.h"
48 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
49 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
50 #define MAX_TSO (1 << 16)
51 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
53 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
54 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
56 /* Supported devices */
57 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
58 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
59 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
60 { 0, } /* end of table */
63 MODULE_DESCRIPTION(DRV_DESCRIPTION);
64 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
65 MODULE_LICENSE("GPL");
66 MODULE_VERSION(DRV_VERSION);
67 MODULE_DEVICE_TABLE(pci, enic_id_table);
70 char name[ETH_GSTRING_LEN];
74 #define ENIC_TX_STAT(stat) \
75 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
76 #define ENIC_RX_STAT(stat) \
77 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
79 static const struct enic_stat enic_tx_stats[] = {
80 ENIC_TX_STAT(tx_frames_ok),
81 ENIC_TX_STAT(tx_unicast_frames_ok),
82 ENIC_TX_STAT(tx_multicast_frames_ok),
83 ENIC_TX_STAT(tx_broadcast_frames_ok),
84 ENIC_TX_STAT(tx_bytes_ok),
85 ENIC_TX_STAT(tx_unicast_bytes_ok),
86 ENIC_TX_STAT(tx_multicast_bytes_ok),
87 ENIC_TX_STAT(tx_broadcast_bytes_ok),
88 ENIC_TX_STAT(tx_drops),
89 ENIC_TX_STAT(tx_errors),
93 static const struct enic_stat enic_rx_stats[] = {
94 ENIC_RX_STAT(rx_frames_ok),
95 ENIC_RX_STAT(rx_frames_total),
96 ENIC_RX_STAT(rx_unicast_frames_ok),
97 ENIC_RX_STAT(rx_multicast_frames_ok),
98 ENIC_RX_STAT(rx_broadcast_frames_ok),
99 ENIC_RX_STAT(rx_bytes_ok),
100 ENIC_RX_STAT(rx_unicast_bytes_ok),
101 ENIC_RX_STAT(rx_multicast_bytes_ok),
102 ENIC_RX_STAT(rx_broadcast_bytes_ok),
103 ENIC_RX_STAT(rx_drop),
104 ENIC_RX_STAT(rx_no_bufs),
105 ENIC_RX_STAT(rx_errors),
106 ENIC_RX_STAT(rx_rss),
107 ENIC_RX_STAT(rx_crc_errors),
108 ENIC_RX_STAT(rx_frames_64),
109 ENIC_RX_STAT(rx_frames_127),
110 ENIC_RX_STAT(rx_frames_255),
111 ENIC_RX_STAT(rx_frames_511),
112 ENIC_RX_STAT(rx_frames_1023),
113 ENIC_RX_STAT(rx_frames_1518),
114 ENIC_RX_STAT(rx_frames_to_max),
117 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
118 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
120 static int enic_is_dynamic(struct enic *enic)
122 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
125 static int enic_get_settings(struct net_device *netdev,
126 struct ethtool_cmd *ecmd)
128 struct enic *enic = netdev_priv(netdev);
130 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
131 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
132 ecmd->port = PORT_FIBRE;
133 ecmd->transceiver = XCVR_EXTERNAL;
135 if (netif_carrier_ok(netdev)) {
136 ecmd->speed = vnic_dev_port_speed(enic->vdev);
137 ecmd->duplex = DUPLEX_FULL;
143 ecmd->autoneg = AUTONEG_DISABLE;
148 static int enic_dev_fw_info(struct enic *enic,
149 struct vnic_devcmd_fw_info **fw_info)
153 spin_lock(&enic->devcmd_lock);
154 err = vnic_dev_fw_info(enic->vdev, fw_info);
155 spin_unlock(&enic->devcmd_lock);
160 static void enic_get_drvinfo(struct net_device *netdev,
161 struct ethtool_drvinfo *drvinfo)
163 struct enic *enic = netdev_priv(netdev);
164 struct vnic_devcmd_fw_info *fw_info;
166 enic_dev_fw_info(enic, &fw_info);
168 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
169 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
170 strncpy(drvinfo->fw_version, fw_info->fw_version,
171 sizeof(drvinfo->fw_version));
172 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
173 sizeof(drvinfo->bus_info));
176 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
182 for (i = 0; i < enic_n_tx_stats; i++) {
183 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
184 data += ETH_GSTRING_LEN;
186 for (i = 0; i < enic_n_rx_stats; i++) {
187 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
188 data += ETH_GSTRING_LEN;
194 static int enic_get_sset_count(struct net_device *netdev, int sset)
198 return enic_n_tx_stats + enic_n_rx_stats;
204 static int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats)
208 spin_lock(&enic->devcmd_lock);
209 err = vnic_dev_stats_dump(enic->vdev, vstats);
210 spin_unlock(&enic->devcmd_lock);
215 static void enic_get_ethtool_stats(struct net_device *netdev,
216 struct ethtool_stats *stats, u64 *data)
218 struct enic *enic = netdev_priv(netdev);
219 struct vnic_stats *vstats;
222 enic_dev_stats_dump(enic, &vstats);
224 for (i = 0; i < enic_n_tx_stats; i++)
225 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
226 for (i = 0; i < enic_n_rx_stats; i++)
227 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
230 static u32 enic_get_rx_csum(struct net_device *netdev)
232 struct enic *enic = netdev_priv(netdev);
233 return enic->csum_rx_enabled;
236 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
238 struct enic *enic = netdev_priv(netdev);
240 if (data && !ENIC_SETTING(enic, RXCSUM))
243 enic->csum_rx_enabled = !!data;
248 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
250 struct enic *enic = netdev_priv(netdev);
252 if (data && !ENIC_SETTING(enic, TXCSUM))
256 netdev->features |= NETIF_F_HW_CSUM;
258 netdev->features &= ~NETIF_F_HW_CSUM;
263 static int enic_set_tso(struct net_device *netdev, u32 data)
265 struct enic *enic = netdev_priv(netdev);
267 if (data && !ENIC_SETTING(enic, TSO))
272 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
275 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
280 static u32 enic_get_msglevel(struct net_device *netdev)
282 struct enic *enic = netdev_priv(netdev);
283 return enic->msg_enable;
286 static void enic_set_msglevel(struct net_device *netdev, u32 value)
288 struct enic *enic = netdev_priv(netdev);
289 enic->msg_enable = value;
292 static int enic_get_coalesce(struct net_device *netdev,
293 struct ethtool_coalesce *ecmd)
295 struct enic *enic = netdev_priv(netdev);
297 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
298 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
303 static int enic_set_coalesce(struct net_device *netdev,
304 struct ethtool_coalesce *ecmd)
306 struct enic *enic = netdev_priv(netdev);
307 u32 tx_coalesce_usecs;
308 u32 rx_coalesce_usecs;
310 tx_coalesce_usecs = min_t(u32,
311 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
312 ecmd->tx_coalesce_usecs);
313 rx_coalesce_usecs = min_t(u32,
314 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
315 ecmd->rx_coalesce_usecs);
317 switch (vnic_dev_get_intr_mode(enic->vdev)) {
318 case VNIC_DEV_INTR_MODE_INTX:
319 if (tx_coalesce_usecs != rx_coalesce_usecs)
322 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ],
323 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
325 case VNIC_DEV_INTR_MODE_MSI:
326 if (tx_coalesce_usecs != rx_coalesce_usecs)
329 vnic_intr_coalescing_timer_set(&enic->intr[0],
330 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
332 case VNIC_DEV_INTR_MODE_MSIX:
333 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ],
334 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
335 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ],
336 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
342 enic->tx_coalesce_usecs = tx_coalesce_usecs;
343 enic->rx_coalesce_usecs = rx_coalesce_usecs;
348 static const struct ethtool_ops enic_ethtool_ops = {
349 .get_settings = enic_get_settings,
350 .get_drvinfo = enic_get_drvinfo,
351 .get_msglevel = enic_get_msglevel,
352 .set_msglevel = enic_set_msglevel,
353 .get_link = ethtool_op_get_link,
354 .get_strings = enic_get_strings,
355 .get_sset_count = enic_get_sset_count,
356 .get_ethtool_stats = enic_get_ethtool_stats,
357 .get_rx_csum = enic_get_rx_csum,
358 .set_rx_csum = enic_set_rx_csum,
359 .get_tx_csum = ethtool_op_get_tx_csum,
360 .set_tx_csum = enic_set_tx_csum,
361 .get_sg = ethtool_op_get_sg,
362 .set_sg = ethtool_op_set_sg,
363 .get_tso = ethtool_op_get_tso,
364 .set_tso = enic_set_tso,
365 .get_coalesce = enic_get_coalesce,
366 .set_coalesce = enic_set_coalesce,
367 .get_flags = ethtool_op_get_flags,
370 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
372 struct enic *enic = vnic_dev_priv(wq->vdev);
375 pci_unmap_single(enic->pdev, buf->dma_addr,
376 buf->len, PCI_DMA_TODEVICE);
378 pci_unmap_page(enic->pdev, buf->dma_addr,
379 buf->len, PCI_DMA_TODEVICE);
382 dev_kfree_skb_any(buf->os_buf);
385 static void enic_wq_free_buf(struct vnic_wq *wq,
386 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
388 enic_free_wq_buf(wq, buf);
391 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
392 u8 type, u16 q_number, u16 completed_index, void *opaque)
394 struct enic *enic = vnic_dev_priv(vdev);
396 spin_lock(&enic->wq_lock[q_number]);
398 vnic_wq_service(&enic->wq[q_number], cq_desc,
399 completed_index, enic_wq_free_buf,
402 if (netif_queue_stopped(enic->netdev) &&
403 vnic_wq_desc_avail(&enic->wq[q_number]) >=
404 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
405 netif_wake_queue(enic->netdev);
407 spin_unlock(&enic->wq_lock[q_number]);
412 static void enic_log_q_error(struct enic *enic)
417 for (i = 0; i < enic->wq_count; i++) {
418 error_status = vnic_wq_error_status(&enic->wq[i]);
420 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
424 for (i = 0; i < enic->rq_count; i++) {
425 error_status = vnic_rq_error_status(&enic->rq[i]);
427 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
432 static void enic_msglvl_check(struct enic *enic)
434 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
436 if (msg_enable != enic->msg_enable) {
437 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
438 enic->msg_enable, msg_enable);
439 enic->msg_enable = msg_enable;
443 static void enic_mtu_check(struct enic *enic)
445 u32 mtu = vnic_dev_mtu(enic->vdev);
446 struct net_device *netdev = enic->netdev;
448 if (mtu && mtu != enic->port_mtu) {
449 enic->port_mtu = mtu;
450 if (mtu < netdev->mtu)
452 "interface MTU (%d) set higher "
453 "than switch port MTU (%d)\n",
458 static void enic_link_check(struct enic *enic)
460 int link_status = vnic_dev_link_status(enic->vdev);
461 int carrier_ok = netif_carrier_ok(enic->netdev);
463 if (link_status && !carrier_ok) {
464 netdev_info(enic->netdev, "Link UP\n");
465 netif_carrier_on(enic->netdev);
466 } else if (!link_status && carrier_ok) {
467 netdev_info(enic->netdev, "Link DOWN\n");
468 netif_carrier_off(enic->netdev);
472 static void enic_notify_check(struct enic *enic)
474 enic_msglvl_check(enic);
475 enic_mtu_check(enic);
476 enic_link_check(enic);
479 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
481 static irqreturn_t enic_isr_legacy(int irq, void *data)
483 struct net_device *netdev = data;
484 struct enic *enic = netdev_priv(netdev);
487 vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
489 pba = vnic_intr_legacy_pba(enic->legacy_pba);
491 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
492 return IRQ_NONE; /* not our interrupt */
495 if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
496 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
497 enic_notify_check(enic);
500 if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
501 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
502 enic_log_q_error(enic);
503 /* schedule recovery from WQ/RQ error */
504 schedule_work(&enic->reset);
508 if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
509 if (napi_schedule_prep(&enic->napi))
510 __napi_schedule(&enic->napi);
512 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
518 static irqreturn_t enic_isr_msi(int irq, void *data)
520 struct enic *enic = data;
522 /* With MSI, there is no sharing of interrupts, so this is
523 * our interrupt and there is no need to ack it. The device
524 * is not providing per-vector masking, so the OS will not
525 * write to PCI config space to mask/unmask the interrupt.
526 * We're using mask_on_assertion for MSI, so the device
527 * automatically masks the interrupt when the interrupt is
528 * generated. Later, when exiting polling, the interrupt
529 * will be unmasked (see enic_poll).
531 * Also, the device uses the same PCIe Traffic Class (TC)
532 * for Memory Write data and MSI, so there are no ordering
533 * issues; the MSI will always arrive at the Root Complex
534 * _after_ corresponding Memory Writes (i.e. descriptor
538 napi_schedule(&enic->napi);
543 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
545 struct enic *enic = data;
547 /* schedule NAPI polling for RQ cleanup */
548 napi_schedule(&enic->napi);
553 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
555 struct enic *enic = data;
556 unsigned int wq_work_to_do = -1; /* no limit */
557 unsigned int wq_work_done;
559 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
560 wq_work_to_do, enic_wq_service, NULL);
562 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
565 1 /* reset intr timer */);
570 static irqreturn_t enic_isr_msix_err(int irq, void *data)
572 struct enic *enic = data;
574 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
576 enic_log_q_error(enic);
578 /* schedule recovery from WQ/RQ error */
579 schedule_work(&enic->reset);
584 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
586 struct enic *enic = data;
588 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
589 enic_notify_check(enic);
594 static inline void enic_queue_wq_skb_cont(struct enic *enic,
595 struct vnic_wq *wq, struct sk_buff *skb,
596 unsigned int len_left, int loopback)
600 /* Queue additional data fragments */
601 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
602 len_left -= frag->size;
603 enic_queue_wq_desc_cont(wq, skb,
604 pci_map_page(enic->pdev, frag->page,
605 frag->page_offset, frag->size,
608 (len_left == 0), /* EOP? */
613 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
614 struct vnic_wq *wq, struct sk_buff *skb,
615 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
617 unsigned int head_len = skb_headlen(skb);
618 unsigned int len_left = skb->len - head_len;
619 int eop = (len_left == 0);
621 /* Queue the main skb fragment. The fragments are no larger
622 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
623 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
624 * per fragment is queued.
626 enic_queue_wq_desc(wq, skb,
627 pci_map_single(enic->pdev, skb->data,
628 head_len, PCI_DMA_TODEVICE),
630 vlan_tag_insert, vlan_tag,
634 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
637 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
638 struct vnic_wq *wq, struct sk_buff *skb,
639 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
641 unsigned int head_len = skb_headlen(skb);
642 unsigned int len_left = skb->len - head_len;
643 unsigned int hdr_len = skb_transport_offset(skb);
644 unsigned int csum_offset = hdr_len + skb->csum_offset;
645 int eop = (len_left == 0);
647 /* Queue the main skb fragment. The fragments are no larger
648 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
649 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
650 * per fragment is queued.
652 enic_queue_wq_desc_csum_l4(wq, skb,
653 pci_map_single(enic->pdev, skb->data,
654 head_len, PCI_DMA_TODEVICE),
658 vlan_tag_insert, vlan_tag,
662 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
665 static inline void enic_queue_wq_skb_tso(struct enic *enic,
666 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
667 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
669 unsigned int frag_len_left = skb_headlen(skb);
670 unsigned int len_left = skb->len - frag_len_left;
671 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
672 int eop = (len_left == 0);
675 unsigned int offset = 0;
678 /* Preload TCP csum field with IP pseudo hdr calculated
679 * with IP length set to zero. HW will later add in length
680 * to each TCP segment resulting from the TSO.
683 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
684 ip_hdr(skb)->check = 0;
685 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
686 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
687 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
688 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
689 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
692 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
693 * for the main skb fragment
695 while (frag_len_left) {
696 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
697 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
698 len, PCI_DMA_TODEVICE);
699 enic_queue_wq_desc_tso(wq, skb,
703 vlan_tag_insert, vlan_tag,
704 eop && (len == frag_len_left), loopback);
705 frag_len_left -= len;
712 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
713 * for additional data fragments
715 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
716 len_left -= frag->size;
717 frag_len_left = frag->size;
718 offset = frag->page_offset;
720 while (frag_len_left) {
721 len = min(frag_len_left,
722 (unsigned int)WQ_ENET_MAX_DESC_LEN);
723 dma_addr = pci_map_page(enic->pdev, frag->page,
726 enic_queue_wq_desc_cont(wq, skb,
730 (len == frag_len_left), /* EOP? */
732 frag_len_left -= len;
738 static inline void enic_queue_wq_skb(struct enic *enic,
739 struct vnic_wq *wq, struct sk_buff *skb)
741 unsigned int mss = skb_shinfo(skb)->gso_size;
742 unsigned int vlan_tag = 0;
743 int vlan_tag_insert = 0;
746 if (enic->vlan_group && vlan_tx_tag_present(skb)) {
747 /* VLAN tag from trunking driver */
749 vlan_tag = vlan_tx_tag_get(skb);
750 } else if (enic->loop_enable) {
751 vlan_tag = enic->loop_tag;
756 enic_queue_wq_skb_tso(enic, wq, skb, mss,
757 vlan_tag_insert, vlan_tag, loopback);
758 else if (skb->ip_summed == CHECKSUM_PARTIAL)
759 enic_queue_wq_skb_csum_l4(enic, wq, skb,
760 vlan_tag_insert, vlan_tag, loopback);
762 enic_queue_wq_skb_vlan(enic, wq, skb,
763 vlan_tag_insert, vlan_tag, loopback);
766 /* netif_tx_lock held, process context with BHs disabled, or BH */
767 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
768 struct net_device *netdev)
770 struct enic *enic = netdev_priv(netdev);
771 struct vnic_wq *wq = &enic->wq[0];
779 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
780 * which is very likely. In the off chance it's going to take
781 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
784 if (skb_shinfo(skb)->gso_size == 0 &&
785 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
786 skb_linearize(skb)) {
791 spin_lock_irqsave(&enic->wq_lock[0], flags);
793 if (vnic_wq_desc_avail(wq) <
794 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
795 netif_stop_queue(netdev);
796 /* This is a hard error, log it */
797 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
798 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
799 return NETDEV_TX_BUSY;
802 enic_queue_wq_skb(enic, wq, skb);
804 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
805 netif_stop_queue(netdev);
807 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
812 /* dev_base_lock rwlock held, nominally process context */
813 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
815 struct enic *enic = netdev_priv(netdev);
816 struct net_device_stats *net_stats = &netdev->stats;
817 struct vnic_stats *stats;
819 enic_dev_stats_dump(enic, &stats);
821 net_stats->tx_packets = stats->tx.tx_frames_ok;
822 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
823 net_stats->tx_errors = stats->tx.tx_errors;
824 net_stats->tx_dropped = stats->tx.tx_drops;
826 net_stats->rx_packets = stats->rx.rx_frames_ok;
827 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
828 net_stats->rx_errors = stats->rx.rx_errors;
829 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
830 net_stats->rx_over_errors = enic->rq_truncated_pkts;
831 net_stats->rx_crc_errors = enic->rq_bad_fcs;
832 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
837 static void enic_reset_multicast_list(struct enic *enic)
843 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
845 struct enic *enic = netdev_priv(netdev);
847 if (enic_is_dynamic(enic)) {
848 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
849 return -EADDRNOTAVAIL;
851 if (!is_valid_ether_addr(addr))
852 return -EADDRNOTAVAIL;
855 memcpy(netdev->dev_addr, addr, netdev->addr_len);
860 static int enic_dev_add_station_addr(struct enic *enic)
864 if (is_valid_ether_addr(enic->netdev->dev_addr)) {
865 spin_lock(&enic->devcmd_lock);
866 err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr);
867 spin_unlock(&enic->devcmd_lock);
873 static int enic_dev_del_station_addr(struct enic *enic)
877 if (is_valid_ether_addr(enic->netdev->dev_addr)) {
878 spin_lock(&enic->devcmd_lock);
879 err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr);
880 spin_unlock(&enic->devcmd_lock);
886 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
888 struct enic *enic = netdev_priv(netdev);
889 struct sockaddr *saddr = p;
890 char *addr = saddr->sa_data;
893 if (netif_running(enic->netdev)) {
894 err = enic_dev_del_station_addr(enic);
899 err = enic_set_mac_addr(netdev, addr);
903 if (netif_running(enic->netdev)) {
904 err = enic_dev_add_station_addr(enic);
912 static int enic_set_mac_address(struct net_device *netdev, void *p)
914 struct sockaddr *saddr = p;
916 return enic_set_mac_addr(netdev, (char *)saddr->sa_data);
919 static int enic_dev_packet_filter(struct enic *enic, int directed,
920 int multicast, int broadcast, int promisc, int allmulti)
924 spin_lock(&enic->devcmd_lock);
925 err = vnic_dev_packet_filter(enic->vdev, directed,
926 multicast, broadcast, promisc, allmulti);
927 spin_unlock(&enic->devcmd_lock);
932 static int enic_dev_add_multicast_addr(struct enic *enic, u8 *addr)
936 spin_lock(&enic->devcmd_lock);
937 err = vnic_dev_add_addr(enic->vdev, addr);
938 spin_unlock(&enic->devcmd_lock);
943 static int enic_dev_del_multicast_addr(struct enic *enic, u8 *addr)
947 spin_lock(&enic->devcmd_lock);
948 err = vnic_dev_del_addr(enic->vdev, addr);
949 spin_unlock(&enic->devcmd_lock);
954 /* netif_tx_lock held, BHs disabled */
955 static void enic_set_multicast_list(struct net_device *netdev)
957 struct enic *enic = netdev_priv(netdev);
958 struct netdev_hw_addr *ha;
960 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
961 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
962 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
963 unsigned int mc_count = netdev_mc_count(netdev);
964 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
965 mc_count > ENIC_MULTICAST_PERFECT_FILTERS;
966 unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0);
967 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
970 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
971 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
973 if (enic->flags != flags) {
975 enic_dev_packet_filter(enic, directed,
976 multicast, broadcast, promisc, allmulti);
979 /* Is there an easier way? Trying to minimize to
980 * calls to add/del multicast addrs. We keep the
981 * addrs from the last call in enic->mc_addr and
982 * look for changes to add/del.
986 netdev_for_each_mc_addr(ha, netdev) {
989 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
992 for (i = 0; i < enic->mc_count; i++) {
993 for (j = 0; j < mc_count; j++)
994 if (compare_ether_addr(enic->mc_addr[i],
998 enic_dev_del_multicast_addr(enic, enic->mc_addr[i]);
1001 for (i = 0; i < mc_count; i++) {
1002 for (j = 0; j < enic->mc_count; j++)
1003 if (compare_ether_addr(mc_addr[i],
1004 enic->mc_addr[j]) == 0)
1006 if (j == enic->mc_count)
1007 enic_dev_add_multicast_addr(enic, mc_addr[i]);
1010 /* Save the list to compare against next time
1013 for (i = 0; i < mc_count; i++)
1014 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
1016 enic->mc_count = mc_count;
1019 /* rtnl lock is held */
1020 static void enic_vlan_rx_register(struct net_device *netdev,
1021 struct vlan_group *vlan_group)
1023 struct enic *enic = netdev_priv(netdev);
1024 enic->vlan_group = vlan_group;
1027 /* rtnl lock is held */
1028 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1030 struct enic *enic = netdev_priv(netdev);
1032 spin_lock(&enic->devcmd_lock);
1033 enic_add_vlan(enic, vid);
1034 spin_unlock(&enic->devcmd_lock);
1037 /* rtnl lock is held */
1038 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1040 struct enic *enic = netdev_priv(netdev);
1042 spin_lock(&enic->devcmd_lock);
1043 enic_del_vlan(enic, vid);
1044 spin_unlock(&enic->devcmd_lock);
1047 /* netif_tx_lock held, BHs disabled */
1048 static void enic_tx_timeout(struct net_device *netdev)
1050 struct enic *enic = netdev_priv(netdev);
1051 schedule_work(&enic->reset);
1054 static int enic_vnic_dev_deinit(struct enic *enic)
1058 spin_lock(&enic->devcmd_lock);
1059 err = vnic_dev_deinit(enic->vdev);
1060 spin_unlock(&enic->devcmd_lock);
1065 static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp)
1069 spin_lock(&enic->devcmd_lock);
1070 err = vnic_dev_init_prov(enic->vdev,
1071 (u8 *)vp, vic_provinfo_size(vp));
1072 spin_unlock(&enic->devcmd_lock);
1077 static int enic_dev_init_done(struct enic *enic, int *done, int *error)
1081 spin_lock(&enic->devcmd_lock);
1082 err = vnic_dev_init_done(enic->vdev, done, error);
1083 spin_unlock(&enic->devcmd_lock);
1088 static int enic_set_port_profile(struct enic *enic, u8 *mac)
1090 struct vic_provinfo *vp;
1091 u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1095 err = enic_vnic_dev_deinit(enic);
1099 switch (enic->pp.request) {
1101 case PORT_REQUEST_ASSOCIATE:
1103 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1106 if (!is_valid_ether_addr(mac))
1107 return -EADDRNOTAVAIL;
1109 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1110 VIC_PROVINFO_LINUX_TYPE);
1114 vic_provinfo_add_tlv(vp,
1115 VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR,
1116 strlen(enic->pp.name) + 1, enic->pp.name);
1118 vic_provinfo_add_tlv(vp,
1119 VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR,
1122 if (enic->pp.set & ENIC_SET_INSTANCE) {
1123 sprintf(uuid_str, "%pUB", enic->pp.instance_uuid);
1124 vic_provinfo_add_tlv(vp,
1125 VIC_LINUX_PROV_TLV_CLIENT_UUID_STR,
1126 sizeof(uuid_str), uuid_str);
1129 if (enic->pp.set & ENIC_SET_HOST) {
1130 sprintf(uuid_str, "%pUB", enic->pp.host_uuid);
1131 vic_provinfo_add_tlv(vp,
1132 VIC_LINUX_PROV_TLV_HOST_UUID_STR,
1133 sizeof(uuid_str), uuid_str);
1136 err = enic_dev_init_prov(enic, vp);
1137 vic_provinfo_free(vp);
1142 case PORT_REQUEST_DISASSOCIATE:
1149 enic->pp.set |= ENIC_SET_APPLIED;
1153 static int enic_set_vf_port(struct net_device *netdev, int vf,
1154 struct nlattr *port[])
1156 struct enic *enic = netdev_priv(netdev);
1158 memset(&enic->pp, 0, sizeof(enic->pp));
1160 if (port[IFLA_PORT_REQUEST]) {
1161 enic->pp.set |= ENIC_SET_REQUEST;
1162 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1165 if (port[IFLA_PORT_PROFILE]) {
1166 enic->pp.set |= ENIC_SET_NAME;
1167 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1171 if (port[IFLA_PORT_INSTANCE_UUID]) {
1172 enic->pp.set |= ENIC_SET_INSTANCE;
1173 memcpy(enic->pp.instance_uuid,
1174 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1177 if (port[IFLA_PORT_HOST_UUID]) {
1178 enic->pp.set |= ENIC_SET_HOST;
1179 memcpy(enic->pp.host_uuid,
1180 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1183 /* don't support VFs, yet */
1184 if (vf != PORT_SELF_VF)
1187 if (!(enic->pp.set & ENIC_SET_REQUEST))
1190 if (enic->pp.request == PORT_REQUEST_ASSOCIATE) {
1192 /* If the interface mac addr hasn't been assigned,
1193 * assign a random mac addr before setting port-
1197 if (is_zero_ether_addr(netdev->dev_addr))
1198 random_ether_addr(netdev->dev_addr);
1201 return enic_set_port_profile(enic, netdev->dev_addr);
1204 static int enic_get_vf_port(struct net_device *netdev, int vf,
1205 struct sk_buff *skb)
1207 struct enic *enic = netdev_priv(netdev);
1208 int err, error, done;
1209 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1211 if (!(enic->pp.set & ENIC_SET_APPLIED))
1214 err = enic_dev_init_done(enic, &done, &error);
1221 response = PORT_PROFILE_RESPONSE_INPROGRESS;
1224 response = PORT_PROFILE_RESPONSE_INVALID;
1227 response = PORT_PROFILE_RESPONSE_BADSTATE;
1230 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1233 response = PORT_PROFILE_RESPONSE_ERROR;
1237 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1238 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1239 if (enic->pp.set & ENIC_SET_NAME)
1240 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1242 if (enic->pp.set & ENIC_SET_INSTANCE)
1243 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1244 enic->pp.instance_uuid);
1245 if (enic->pp.set & ENIC_SET_HOST)
1246 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1247 enic->pp.host_uuid);
1255 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1257 struct enic *enic = vnic_dev_priv(rq->vdev);
1262 pci_unmap_single(enic->pdev, buf->dma_addr,
1263 buf->len, PCI_DMA_FROMDEVICE);
1264 dev_kfree_skb_any(buf->os_buf);
1267 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1269 struct enic *enic = vnic_dev_priv(rq->vdev);
1270 struct net_device *netdev = enic->netdev;
1271 struct sk_buff *skb;
1272 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1273 unsigned int os_buf_index = 0;
1274 dma_addr_t dma_addr;
1276 skb = netdev_alloc_skb_ip_align(netdev, len);
1280 dma_addr = pci_map_single(enic->pdev, skb->data,
1281 len, PCI_DMA_FROMDEVICE);
1283 enic_queue_rq_desc(rq, skb, os_buf_index,
1289 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
1291 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
1293 if (vnic_rq_posting_soon(rq)) {
1295 /* SW workaround for A0 HW erratum: if we're just about
1296 * to write posted_index, insert a dummy desc
1300 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
1301 vnic_rq_post(rq, 0, 0, 0, 0);
1303 return enic_rq_alloc_buf(rq);
1309 static int enic_dev_hw_version(struct enic *enic,
1310 enum vnic_dev_hw_version *hw_ver)
1314 spin_lock(&enic->devcmd_lock);
1315 err = vnic_dev_hw_version(enic->vdev, hw_ver);
1316 spin_unlock(&enic->devcmd_lock);
1321 static int enic_set_rq_alloc_buf(struct enic *enic)
1323 enum vnic_dev_hw_version hw_ver;
1326 err = enic_dev_hw_version(enic, &hw_ver);
1331 case VNIC_DEV_HW_VER_A1:
1332 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
1334 case VNIC_DEV_HW_VER_A2:
1335 case VNIC_DEV_HW_VER_UNKNOWN:
1336 enic->rq_alloc_buf = enic_rq_alloc_buf;
1345 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1346 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1347 int skipped, void *opaque)
1349 struct enic *enic = vnic_dev_priv(rq->vdev);
1350 struct net_device *netdev = enic->netdev;
1351 struct sk_buff *skb;
1353 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1354 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1355 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1356 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1358 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1365 prefetch(skb->data - NET_IP_ALIGN);
1366 pci_unmap_single(enic->pdev, buf->dma_addr,
1367 buf->len, PCI_DMA_FROMDEVICE);
1369 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1370 &type, &color, &q_number, &completed_index,
1371 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1372 &csum_not_calc, &rss_hash, &bytes_written,
1373 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1374 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1375 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1376 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1382 if (bytes_written > 0)
1384 else if (bytes_written == 0)
1385 enic->rq_truncated_pkts++;
1388 dev_kfree_skb_any(skb);
1393 if (eop && bytes_written > 0) {
1398 skb_put(skb, bytes_written);
1399 skb->protocol = eth_type_trans(skb, netdev);
1401 if (enic->csum_rx_enabled && !csum_not_calc) {
1402 skb->csum = htons(checksum);
1403 skb->ip_summed = CHECKSUM_COMPLETE;
1408 if (enic->vlan_group && vlan_stripped &&
1409 (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1411 if (netdev->features & NETIF_F_GRO)
1412 vlan_gro_receive(&enic->napi, enic->vlan_group,
1415 vlan_hwaccel_receive_skb(skb,
1416 enic->vlan_group, vlan_tci);
1420 if (netdev->features & NETIF_F_GRO)
1421 napi_gro_receive(&enic->napi, skb);
1423 netif_receive_skb(skb);
1432 dev_kfree_skb_any(skb);
1436 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1437 u8 type, u16 q_number, u16 completed_index, void *opaque)
1439 struct enic *enic = vnic_dev_priv(vdev);
1441 vnic_rq_service(&enic->rq[q_number], cq_desc,
1442 completed_index, VNIC_RQ_RETURN_DESC,
1443 enic_rq_indicate_buf, opaque);
1448 static int enic_poll(struct napi_struct *napi, int budget)
1450 struct enic *enic = container_of(napi, struct enic, napi);
1451 unsigned int rq_work_to_do = budget;
1452 unsigned int wq_work_to_do = -1; /* no limit */
1453 unsigned int work_done, rq_work_done, wq_work_done;
1456 /* Service RQ (first) and WQ
1459 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1460 rq_work_to_do, enic_rq_service, NULL);
1462 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1463 wq_work_to_do, enic_wq_service, NULL);
1465 /* Accumulate intr event credits for this polling
1466 * cycle. An intr event is the completion of a
1467 * a WQ or RQ packet.
1470 work_done = rq_work_done + wq_work_done;
1473 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1475 0 /* don't unmask intr */,
1476 0 /* don't reset intr timer */);
1478 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1480 /* Buffer allocation failed. Stay in polling
1481 * mode so we can try to fill the ring again.
1485 rq_work_done = rq_work_to_do;
1487 if (rq_work_done < rq_work_to_do) {
1489 /* Some work done, but not enough to stay in polling,
1493 napi_complete(napi);
1494 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1497 return rq_work_done;
1500 static int enic_poll_msix(struct napi_struct *napi, int budget)
1502 struct enic *enic = container_of(napi, struct enic, napi);
1503 unsigned int work_to_do = budget;
1504 unsigned int work_done;
1510 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1511 work_to_do, enic_rq_service, NULL);
1513 /* Return intr event credits for this polling
1514 * cycle. An intr event is the completion of a
1519 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1521 0 /* don't unmask intr */,
1522 0 /* don't reset intr timer */);
1524 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1526 /* Buffer allocation failed. Stay in polling mode
1527 * so we can try to fill the ring again.
1531 work_done = work_to_do;
1533 if (work_done < work_to_do) {
1535 /* Some work done, but not enough to stay in polling,
1539 napi_complete(napi);
1540 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1546 static void enic_notify_timer(unsigned long data)
1548 struct enic *enic = (struct enic *)data;
1550 enic_notify_check(enic);
1552 mod_timer(&enic->notify_timer,
1553 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1556 static void enic_free_intr(struct enic *enic)
1558 struct net_device *netdev = enic->netdev;
1561 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1562 case VNIC_DEV_INTR_MODE_INTX:
1563 free_irq(enic->pdev->irq, netdev);
1565 case VNIC_DEV_INTR_MODE_MSI:
1566 free_irq(enic->pdev->irq, enic);
1568 case VNIC_DEV_INTR_MODE_MSIX:
1569 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1570 if (enic->msix[i].requested)
1571 free_irq(enic->msix_entry[i].vector,
1572 enic->msix[i].devid);
1579 static int enic_request_intr(struct enic *enic)
1581 struct net_device *netdev = enic->netdev;
1585 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1587 case VNIC_DEV_INTR_MODE_INTX:
1589 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1590 IRQF_SHARED, netdev->name, netdev);
1593 case VNIC_DEV_INTR_MODE_MSI:
1595 err = request_irq(enic->pdev->irq, enic_isr_msi,
1596 0, netdev->name, enic);
1599 case VNIC_DEV_INTR_MODE_MSIX:
1601 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1602 "%.11s-rx-0", netdev->name);
1603 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1604 enic->msix[ENIC_MSIX_RQ].devid = enic;
1606 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1607 "%.11s-tx-0", netdev->name);
1608 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1609 enic->msix[ENIC_MSIX_WQ].devid = enic;
1611 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1612 "%.11s-err", netdev->name);
1613 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1614 enic->msix[ENIC_MSIX_ERR].devid = enic;
1616 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1617 "%.11s-notify", netdev->name);
1618 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1619 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1621 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1622 err = request_irq(enic->msix_entry[i].vector,
1623 enic->msix[i].isr, 0,
1624 enic->msix[i].devname,
1625 enic->msix[i].devid);
1627 enic_free_intr(enic);
1630 enic->msix[i].requested = 1;
1642 static void enic_synchronize_irqs(struct enic *enic)
1646 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1647 case VNIC_DEV_INTR_MODE_INTX:
1648 case VNIC_DEV_INTR_MODE_MSI:
1649 synchronize_irq(enic->pdev->irq);
1651 case VNIC_DEV_INTR_MODE_MSIX:
1652 for (i = 0; i < enic->intr_count; i++)
1653 synchronize_irq(enic->msix_entry[i].vector);
1660 static int enic_dev_notify_set(struct enic *enic)
1664 spin_lock(&enic->devcmd_lock);
1665 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1666 case VNIC_DEV_INTR_MODE_INTX:
1667 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1669 case VNIC_DEV_INTR_MODE_MSIX:
1670 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1673 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1676 spin_unlock(&enic->devcmd_lock);
1681 static int enic_dev_notify_unset(struct enic *enic)
1685 spin_lock(&enic->devcmd_lock);
1686 err = vnic_dev_notify_unset(enic->vdev);
1687 spin_unlock(&enic->devcmd_lock);
1692 static int enic_dev_enable(struct enic *enic)
1696 spin_lock(&enic->devcmd_lock);
1697 err = vnic_dev_enable(enic->vdev);
1698 spin_unlock(&enic->devcmd_lock);
1703 static int enic_dev_disable(struct enic *enic)
1707 spin_lock(&enic->devcmd_lock);
1708 err = vnic_dev_disable(enic->vdev);
1709 spin_unlock(&enic->devcmd_lock);
1714 static void enic_notify_timer_start(struct enic *enic)
1716 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1717 case VNIC_DEV_INTR_MODE_MSI:
1718 mod_timer(&enic->notify_timer, jiffies);
1721 /* Using intr for notification for INTx/MSI-X */
1726 /* rtnl lock is held, process context */
1727 static int enic_open(struct net_device *netdev)
1729 struct enic *enic = netdev_priv(netdev);
1733 err = enic_request_intr(enic);
1735 netdev_err(netdev, "Unable to request irq.\n");
1739 err = enic_dev_notify_set(enic);
1742 "Failed to alloc notify buffer, aborting.\n");
1743 goto err_out_free_intr;
1746 for (i = 0; i < enic->rq_count; i++) {
1747 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1748 /* Need at least one buffer on ring to get going */
1749 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1750 netdev_err(netdev, "Unable to alloc receive buffers\n");
1752 goto err_out_notify_unset;
1756 for (i = 0; i < enic->wq_count; i++)
1757 vnic_wq_enable(&enic->wq[i]);
1758 for (i = 0; i < enic->rq_count; i++)
1759 vnic_rq_enable(&enic->rq[i]);
1761 enic_dev_add_station_addr(enic);
1762 enic_set_multicast_list(netdev);
1764 netif_wake_queue(netdev);
1765 napi_enable(&enic->napi);
1766 enic_dev_enable(enic);
1768 for (i = 0; i < enic->intr_count; i++)
1769 vnic_intr_unmask(&enic->intr[i]);
1771 enic_notify_timer_start(enic);
1775 err_out_notify_unset:
1776 enic_dev_notify_unset(enic);
1778 enic_free_intr(enic);
1783 /* rtnl lock is held, process context */
1784 static int enic_stop(struct net_device *netdev)
1786 struct enic *enic = netdev_priv(netdev);
1790 for (i = 0; i < enic->intr_count; i++) {
1791 vnic_intr_mask(&enic->intr[i]);
1792 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1795 enic_synchronize_irqs(enic);
1797 del_timer_sync(&enic->notify_timer);
1799 enic_dev_disable(enic);
1800 napi_disable(&enic->napi);
1801 netif_carrier_off(netdev);
1802 netif_tx_disable(netdev);
1803 enic_dev_del_station_addr(enic);
1805 for (i = 0; i < enic->wq_count; i++) {
1806 err = vnic_wq_disable(&enic->wq[i]);
1810 for (i = 0; i < enic->rq_count; i++) {
1811 err = vnic_rq_disable(&enic->rq[i]);
1816 enic_dev_notify_unset(enic);
1817 enic_free_intr(enic);
1819 for (i = 0; i < enic->wq_count; i++)
1820 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1821 for (i = 0; i < enic->rq_count; i++)
1822 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1823 for (i = 0; i < enic->cq_count; i++)
1824 vnic_cq_clean(&enic->cq[i]);
1825 for (i = 0; i < enic->intr_count; i++)
1826 vnic_intr_clean(&enic->intr[i]);
1831 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1833 struct enic *enic = netdev_priv(netdev);
1834 int running = netif_running(netdev);
1836 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1842 netdev->mtu = new_mtu;
1844 if (netdev->mtu > enic->port_mtu)
1846 "interface MTU (%d) set higher than port MTU (%d)\n",
1847 netdev->mtu, enic->port_mtu);
1855 #ifdef CONFIG_NET_POLL_CONTROLLER
1856 static void enic_poll_controller(struct net_device *netdev)
1858 struct enic *enic = netdev_priv(netdev);
1859 struct vnic_dev *vdev = enic->vdev;
1861 switch (vnic_dev_get_intr_mode(vdev)) {
1862 case VNIC_DEV_INTR_MODE_MSIX:
1863 enic_isr_msix_rq(enic->pdev->irq, enic);
1864 enic_isr_msix_wq(enic->pdev->irq, enic);
1866 case VNIC_DEV_INTR_MODE_MSI:
1867 enic_isr_msi(enic->pdev->irq, enic);
1869 case VNIC_DEV_INTR_MODE_INTX:
1870 enic_isr_legacy(enic->pdev->irq, netdev);
1878 static int enic_dev_wait(struct vnic_dev *vdev,
1879 int (*start)(struct vnic_dev *, int),
1880 int (*finished)(struct vnic_dev *, int *),
1887 BUG_ON(in_interrupt());
1889 err = start(vdev, arg);
1893 /* Wait for func to complete...2 seconds max
1896 time = jiffies + (HZ * 2);
1899 err = finished(vdev, &done);
1906 schedule_timeout_uninterruptible(HZ / 10);
1908 } while (time_after(time, jiffies));
1913 static int enic_dev_open(struct enic *enic)
1917 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1918 vnic_dev_open_done, 0);
1920 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1926 static int enic_dev_hang_reset(struct enic *enic)
1930 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1931 vnic_dev_hang_reset_done, 0);
1933 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1939 static int enic_set_niccfg(struct enic *enic)
1941 const u8 rss_default_cpu = 0;
1942 const u8 rss_hash_type = 0;
1943 const u8 rss_hash_bits = 0;
1944 const u8 rss_base_cpu = 0;
1945 const u8 rss_enable = 0;
1946 const u8 tso_ipid_split_en = 0;
1947 const u8 ig_vlan_strip_en = 1;
1950 /* Enable VLAN tag stripping. RSS not enabled (yet).
1953 spin_lock(&enic->devcmd_lock);
1954 err = enic_set_nic_cfg(enic,
1955 rss_default_cpu, rss_hash_type,
1956 rss_hash_bits, rss_base_cpu,
1957 rss_enable, tso_ipid_split_en,
1959 spin_unlock(&enic->devcmd_lock);
1964 static int enic_dev_hang_notify(struct enic *enic)
1968 spin_lock(&enic->devcmd_lock);
1969 err = vnic_dev_hang_notify(enic->vdev);
1970 spin_unlock(&enic->devcmd_lock);
1975 int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic)
1979 spin_lock(&enic->devcmd_lock);
1980 err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1981 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
1982 spin_unlock(&enic->devcmd_lock);
1987 static void enic_reset(struct work_struct *work)
1989 struct enic *enic = container_of(work, struct enic, reset);
1991 if (!netif_running(enic->netdev))
1996 enic_dev_hang_notify(enic);
1997 enic_stop(enic->netdev);
1998 enic_dev_hang_reset(enic);
1999 enic_reset_multicast_list(enic);
2000 enic_init_vnic_resources(enic);
2001 enic_set_niccfg(enic);
2002 enic_dev_set_ig_vlan_rewrite_mode(enic);
2003 enic_open(enic->netdev);
2008 static int enic_set_intr_mode(struct enic *enic)
2014 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2015 * system capabilities.
2019 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2020 * (the second to last INTR is used for WQ/RQ errors)
2021 * (the last INTR is used for notifications)
2024 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2025 for (i = 0; i < n + m + 2; i++)
2026 enic->msix_entry[i].entry = i;
2028 if (enic->config.intr_mode < 1 &&
2029 enic->rq_count >= n &&
2030 enic->wq_count >= m &&
2031 enic->cq_count >= n + m &&
2032 enic->intr_count >= n + m + 2 &&
2033 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2037 enic->cq_count = n + m;
2038 enic->intr_count = n + m + 2;
2040 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
2047 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2050 if (enic->config.intr_mode < 2 &&
2051 enic->rq_count >= 1 &&
2052 enic->wq_count >= 1 &&
2053 enic->cq_count >= 2 &&
2054 enic->intr_count >= 1 &&
2055 !pci_enable_msi(enic->pdev)) {
2060 enic->intr_count = 1;
2062 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2069 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2070 * (the first INTR is used for WQ/RQ)
2071 * (the second INTR is used for WQ/RQ errors)
2072 * (the last INTR is used for notifications)
2075 if (enic->config.intr_mode < 3 &&
2076 enic->rq_count >= 1 &&
2077 enic->wq_count >= 1 &&
2078 enic->cq_count >= 2 &&
2079 enic->intr_count >= 3) {
2084 enic->intr_count = 3;
2086 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2091 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2096 static void enic_clear_intr_mode(struct enic *enic)
2098 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2099 case VNIC_DEV_INTR_MODE_MSIX:
2100 pci_disable_msix(enic->pdev);
2102 case VNIC_DEV_INTR_MODE_MSI:
2103 pci_disable_msi(enic->pdev);
2109 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2112 static const struct net_device_ops enic_netdev_dynamic_ops = {
2113 .ndo_open = enic_open,
2114 .ndo_stop = enic_stop,
2115 .ndo_start_xmit = enic_hard_start_xmit,
2116 .ndo_get_stats = enic_get_stats,
2117 .ndo_validate_addr = eth_validate_addr,
2118 .ndo_set_multicast_list = enic_set_multicast_list,
2119 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2120 .ndo_change_mtu = enic_change_mtu,
2121 .ndo_vlan_rx_register = enic_vlan_rx_register,
2122 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2123 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2124 .ndo_tx_timeout = enic_tx_timeout,
2125 .ndo_set_vf_port = enic_set_vf_port,
2126 .ndo_get_vf_port = enic_get_vf_port,
2127 #ifdef CONFIG_NET_POLL_CONTROLLER
2128 .ndo_poll_controller = enic_poll_controller,
2132 static const struct net_device_ops enic_netdev_ops = {
2133 .ndo_open = enic_open,
2134 .ndo_stop = enic_stop,
2135 .ndo_start_xmit = enic_hard_start_xmit,
2136 .ndo_get_stats = enic_get_stats,
2137 .ndo_validate_addr = eth_validate_addr,
2138 .ndo_set_mac_address = enic_set_mac_address,
2139 .ndo_set_multicast_list = enic_set_multicast_list,
2140 .ndo_change_mtu = enic_change_mtu,
2141 .ndo_vlan_rx_register = enic_vlan_rx_register,
2142 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2143 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2144 .ndo_tx_timeout = enic_tx_timeout,
2145 #ifdef CONFIG_NET_POLL_CONTROLLER
2146 .ndo_poll_controller = enic_poll_controller,
2150 void enic_dev_deinit(struct enic *enic)
2152 netif_napi_del(&enic->napi);
2153 enic_free_vnic_resources(enic);
2154 enic_clear_intr_mode(enic);
2157 int enic_dev_init(struct enic *enic)
2159 struct device *dev = enic_get_dev(enic);
2160 struct net_device *netdev = enic->netdev;
2163 /* Get vNIC configuration
2166 err = enic_get_vnic_config(enic);
2168 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2172 /* Get available resource counts
2175 enic_get_res_counts(enic);
2177 /* Set interrupt mode based on resource counts and system
2181 err = enic_set_intr_mode(enic);
2183 dev_err(dev, "Failed to set intr mode based on resource "
2184 "counts and system capabilities, aborting\n");
2188 /* Allocate and configure vNIC resources
2191 err = enic_alloc_vnic_resources(enic);
2193 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2194 goto err_out_free_vnic_resources;
2197 enic_init_vnic_resources(enic);
2199 err = enic_set_rq_alloc_buf(enic);
2201 dev_err(dev, "Failed to set RQ buffer allocator, aborting\n");
2202 goto err_out_free_vnic_resources;
2205 err = enic_set_niccfg(enic);
2207 dev_err(dev, "Failed to config nic, aborting\n");
2208 goto err_out_free_vnic_resources;
2211 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2214 "Failed to set ingress vlan rewrite mode, aborting.\n");
2215 goto err_out_free_vnic_resources;
2218 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2220 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
2222 case VNIC_DEV_INTR_MODE_MSIX:
2223 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
2229 err_out_free_vnic_resources:
2230 enic_clear_intr_mode(enic);
2231 enic_free_vnic_resources(enic);
2236 static void enic_iounmap(struct enic *enic)
2240 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2241 if (enic->bar[i].vaddr)
2242 iounmap(enic->bar[i].vaddr);
2245 static int __devinit enic_probe(struct pci_dev *pdev,
2246 const struct pci_device_id *ent)
2248 struct device *dev = &pdev->dev;
2249 struct net_device *netdev;
2255 /* Allocate net device structure and initialize. Private
2256 * instance data is initialized to zero.
2259 netdev = alloc_etherdev(sizeof(struct enic));
2261 pr_err("Etherdev alloc failed, aborting\n");
2265 pci_set_drvdata(pdev, netdev);
2267 SET_NETDEV_DEV(netdev, &pdev->dev);
2269 enic = netdev_priv(netdev);
2270 enic->netdev = netdev;
2273 /* Setup PCI resources
2276 err = pci_enable_device_mem(pdev);
2278 dev_err(dev, "Cannot enable PCI device, aborting\n");
2279 goto err_out_free_netdev;
2282 err = pci_request_regions(pdev, DRV_NAME);
2284 dev_err(dev, "Cannot request PCI regions, aborting\n");
2285 goto err_out_disable_device;
2288 pci_set_master(pdev);
2290 /* Query PCI controller on system for DMA addressing
2291 * limitation for the device. Try 40-bit first, and
2295 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2297 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2299 dev_err(dev, "No usable DMA configuration, aborting\n");
2300 goto err_out_release_regions;
2302 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2304 dev_err(dev, "Unable to obtain %u-bit DMA "
2305 "for consistent allocations, aborting\n", 32);
2306 goto err_out_release_regions;
2309 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2311 dev_err(dev, "Unable to obtain %u-bit DMA "
2312 "for consistent allocations, aborting\n", 40);
2313 goto err_out_release_regions;
2318 /* Map vNIC resources from BAR0-5
2321 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2322 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2324 enic->bar[i].len = pci_resource_len(pdev, i);
2325 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2326 if (!enic->bar[i].vaddr) {
2327 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2329 goto err_out_iounmap;
2331 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2334 /* Register vNIC device
2337 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2338 ARRAY_SIZE(enic->bar));
2340 dev_err(dev, "vNIC registration failed, aborting\n");
2342 goto err_out_iounmap;
2345 /* Issue device open to get device in known state
2348 err = enic_dev_open(enic);
2350 dev_err(dev, "vNIC dev open failed, aborting\n");
2351 goto err_out_vnic_unregister;
2354 /* Issue device init to initialize the vnic-to-switch link.
2355 * We'll start with carrier off and wait for link UP
2356 * notification later to turn on carrier. We don't need
2357 * to wait here for the vnic-to-switch link initialization
2358 * to complete; link UP notification is the indication that
2359 * the process is complete.
2362 netif_carrier_off(netdev);
2364 /* Do not call dev_init for a dynamic vnic.
2365 * For a dynamic vnic, init_prov_info will be
2366 * called later by an upper layer.
2369 if (!enic_is_dynamic(enic)) {
2370 err = vnic_dev_init(enic->vdev, 0);
2372 dev_err(dev, "vNIC dev init failed, aborting\n");
2373 goto err_out_dev_close;
2377 /* Setup devcmd lock
2380 spin_lock_init(&enic->devcmd_lock);
2382 err = enic_dev_init(enic);
2384 dev_err(dev, "Device initialization failed, aborting\n");
2385 goto err_out_dev_close;
2388 /* Setup notification timer, HW reset task, and wq locks
2391 init_timer(&enic->notify_timer);
2392 enic->notify_timer.function = enic_notify_timer;
2393 enic->notify_timer.data = (unsigned long)enic;
2395 INIT_WORK(&enic->reset, enic_reset);
2397 for (i = 0; i < enic->wq_count; i++)
2398 spin_lock_init(&enic->wq_lock[i]);
2400 /* Register net device
2403 enic->port_mtu = enic->config.mtu;
2404 (void)enic_change_mtu(netdev, enic->port_mtu);
2406 err = enic_set_mac_addr(netdev, enic->mac_addr);
2408 dev_err(dev, "Invalid MAC address, aborting\n");
2409 goto err_out_dev_deinit;
2412 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2413 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2415 if (enic_is_dynamic(enic))
2416 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2418 netdev->netdev_ops = &enic_netdev_ops;
2420 netdev->watchdog_timeo = 2 * HZ;
2421 netdev->ethtool_ops = &enic_ethtool_ops;
2423 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2424 if (ENIC_SETTING(enic, LOOP)) {
2425 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2426 enic->loop_enable = 1;
2427 enic->loop_tag = enic->config.loop_tag;
2428 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2430 if (ENIC_SETTING(enic, TXCSUM))
2431 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2432 if (ENIC_SETTING(enic, TSO))
2433 netdev->features |= NETIF_F_TSO |
2434 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2435 if (ENIC_SETTING(enic, LRO))
2436 netdev->features |= NETIF_F_GRO;
2438 netdev->features |= NETIF_F_HIGHDMA;
2440 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2442 err = register_netdev(netdev);
2444 dev_err(dev, "Cannot register net device, aborting\n");
2445 goto err_out_dev_deinit;
2451 enic_dev_deinit(enic);
2453 vnic_dev_close(enic->vdev);
2454 err_out_vnic_unregister:
2455 vnic_dev_unregister(enic->vdev);
2458 err_out_release_regions:
2459 pci_release_regions(pdev);
2460 err_out_disable_device:
2461 pci_disable_device(pdev);
2462 err_out_free_netdev:
2463 pci_set_drvdata(pdev, NULL);
2464 free_netdev(netdev);
2469 static void __devexit enic_remove(struct pci_dev *pdev)
2471 struct net_device *netdev = pci_get_drvdata(pdev);
2474 struct enic *enic = netdev_priv(netdev);
2476 flush_scheduled_work();
2477 unregister_netdev(netdev);
2478 enic_dev_deinit(enic);
2479 vnic_dev_close(enic->vdev);
2480 vnic_dev_unregister(enic->vdev);
2482 pci_release_regions(pdev);
2483 pci_disable_device(pdev);
2484 pci_set_drvdata(pdev, NULL);
2485 free_netdev(netdev);
2489 static struct pci_driver enic_driver = {
2491 .id_table = enic_id_table,
2492 .probe = enic_probe,
2493 .remove = __devexit_p(enic_remove),
2496 static int __init enic_init_module(void)
2498 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2500 return pci_register_driver(&enic_driver);
2503 static void __exit enic_cleanup_module(void)
2505 pci_unregister_driver(&enic_driver);
2508 module_init(enic_init_module);
2509 module_exit(enic_cleanup_module);