2 * Copyright 2008 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 <net/ip6_checksum.h>
39 #include "cq_enet_desc.h"
41 #include "vnic_intr.h"
42 #include "vnic_stats.h"
46 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
48 /* Supported devices */
49 static struct pci_device_id enic_id_table[] = {
50 { PCI_VDEVICE(CISCO, 0x0043) },
51 { 0, } /* end of table */
54 MODULE_DESCRIPTION(DRV_DESCRIPTION);
55 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
56 MODULE_LICENSE("GPL");
57 MODULE_VERSION(DRV_VERSION);
58 MODULE_DEVICE_TABLE(pci, enic_id_table);
61 char name[ETH_GSTRING_LEN];
65 #define ENIC_TX_STAT(stat) \
66 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
67 #define ENIC_RX_STAT(stat) \
68 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
70 static const struct enic_stat enic_tx_stats[] = {
71 ENIC_TX_STAT(tx_frames_ok),
72 ENIC_TX_STAT(tx_unicast_frames_ok),
73 ENIC_TX_STAT(tx_multicast_frames_ok),
74 ENIC_TX_STAT(tx_broadcast_frames_ok),
75 ENIC_TX_STAT(tx_bytes_ok),
76 ENIC_TX_STAT(tx_unicast_bytes_ok),
77 ENIC_TX_STAT(tx_multicast_bytes_ok),
78 ENIC_TX_STAT(tx_broadcast_bytes_ok),
79 ENIC_TX_STAT(tx_drops),
80 ENIC_TX_STAT(tx_errors),
84 static const struct enic_stat enic_rx_stats[] = {
85 ENIC_RX_STAT(rx_frames_ok),
86 ENIC_RX_STAT(rx_frames_total),
87 ENIC_RX_STAT(rx_unicast_frames_ok),
88 ENIC_RX_STAT(rx_multicast_frames_ok),
89 ENIC_RX_STAT(rx_broadcast_frames_ok),
90 ENIC_RX_STAT(rx_bytes_ok),
91 ENIC_RX_STAT(rx_unicast_bytes_ok),
92 ENIC_RX_STAT(rx_multicast_bytes_ok),
93 ENIC_RX_STAT(rx_broadcast_bytes_ok),
94 ENIC_RX_STAT(rx_drop),
95 ENIC_RX_STAT(rx_no_bufs),
96 ENIC_RX_STAT(rx_errors),
98 ENIC_RX_STAT(rx_crc_errors),
99 ENIC_RX_STAT(rx_frames_64),
100 ENIC_RX_STAT(rx_frames_127),
101 ENIC_RX_STAT(rx_frames_255),
102 ENIC_RX_STAT(rx_frames_511),
103 ENIC_RX_STAT(rx_frames_1023),
104 ENIC_RX_STAT(rx_frames_1518),
105 ENIC_RX_STAT(rx_frames_to_max),
108 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
109 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
111 static int enic_get_settings(struct net_device *netdev,
112 struct ethtool_cmd *ecmd)
114 struct enic *enic = netdev_priv(netdev);
116 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
117 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
118 ecmd->port = PORT_FIBRE;
119 ecmd->transceiver = XCVR_EXTERNAL;
121 if (netif_carrier_ok(netdev)) {
122 ecmd->speed = vnic_dev_port_speed(enic->vdev);
123 ecmd->duplex = DUPLEX_FULL;
129 ecmd->autoneg = AUTONEG_DISABLE;
134 static void enic_get_drvinfo(struct net_device *netdev,
135 struct ethtool_drvinfo *drvinfo)
137 struct enic *enic = netdev_priv(netdev);
138 struct vnic_devcmd_fw_info *fw_info;
140 spin_lock(&enic->devcmd_lock);
141 vnic_dev_fw_info(enic->vdev, &fw_info);
142 spin_unlock(&enic->devcmd_lock);
144 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
145 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
146 strncpy(drvinfo->fw_version, fw_info->fw_version,
147 sizeof(drvinfo->fw_version));
148 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
149 sizeof(drvinfo->bus_info));
152 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
158 for (i = 0; i < enic_n_tx_stats; i++) {
159 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
160 data += ETH_GSTRING_LEN;
162 for (i = 0; i < enic_n_rx_stats; i++) {
163 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
164 data += ETH_GSTRING_LEN;
170 static int enic_get_sset_count(struct net_device *netdev, int sset)
174 return enic_n_tx_stats + enic_n_rx_stats;
180 static void enic_get_ethtool_stats(struct net_device *netdev,
181 struct ethtool_stats *stats, u64 *data)
183 struct enic *enic = netdev_priv(netdev);
184 struct vnic_stats *vstats;
187 spin_lock(&enic->devcmd_lock);
188 vnic_dev_stats_dump(enic->vdev, &vstats);
189 spin_unlock(&enic->devcmd_lock);
191 for (i = 0; i < enic_n_tx_stats; i++)
192 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
193 for (i = 0; i < enic_n_rx_stats; i++)
194 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
197 static u32 enic_get_rx_csum(struct net_device *netdev)
199 struct enic *enic = netdev_priv(netdev);
200 return enic->csum_rx_enabled;
203 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
205 struct enic *enic = netdev_priv(netdev);
207 if (data && !ENIC_SETTING(enic, RXCSUM))
210 enic->csum_rx_enabled = !!data;
215 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
217 struct enic *enic = netdev_priv(netdev);
219 if (data && !ENIC_SETTING(enic, TXCSUM))
223 netdev->features |= NETIF_F_HW_CSUM;
225 netdev->features &= ~NETIF_F_HW_CSUM;
230 static int enic_set_tso(struct net_device *netdev, u32 data)
232 struct enic *enic = netdev_priv(netdev);
234 if (data && !ENIC_SETTING(enic, TSO))
239 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
242 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
247 static u32 enic_get_msglevel(struct net_device *netdev)
249 struct enic *enic = netdev_priv(netdev);
250 return enic->msg_enable;
253 static void enic_set_msglevel(struct net_device *netdev, u32 value)
255 struct enic *enic = netdev_priv(netdev);
256 enic->msg_enable = value;
259 static struct ethtool_ops enic_ethtool_ops = {
260 .get_settings = enic_get_settings,
261 .get_drvinfo = enic_get_drvinfo,
262 .get_msglevel = enic_get_msglevel,
263 .set_msglevel = enic_set_msglevel,
264 .get_link = ethtool_op_get_link,
265 .get_strings = enic_get_strings,
266 .get_sset_count = enic_get_sset_count,
267 .get_ethtool_stats = enic_get_ethtool_stats,
268 .get_rx_csum = enic_get_rx_csum,
269 .set_rx_csum = enic_set_rx_csum,
270 .get_tx_csum = ethtool_op_get_tx_csum,
271 .set_tx_csum = enic_set_tx_csum,
272 .get_sg = ethtool_op_get_sg,
273 .set_sg = ethtool_op_set_sg,
274 .get_tso = ethtool_op_get_tso,
275 .set_tso = enic_set_tso,
276 .get_flags = ethtool_op_get_flags,
277 .set_flags = ethtool_op_set_flags,
280 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
282 struct enic *enic = vnic_dev_priv(wq->vdev);
285 pci_unmap_single(enic->pdev, buf->dma_addr,
286 buf->len, PCI_DMA_TODEVICE);
288 pci_unmap_page(enic->pdev, buf->dma_addr,
289 buf->len, PCI_DMA_TODEVICE);
292 dev_kfree_skb_any(buf->os_buf);
295 static void enic_wq_free_buf(struct vnic_wq *wq,
296 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
298 enic_free_wq_buf(wq, buf);
301 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
302 u8 type, u16 q_number, u16 completed_index, void *opaque)
304 struct enic *enic = vnic_dev_priv(vdev);
306 spin_lock(&enic->wq_lock[q_number]);
308 vnic_wq_service(&enic->wq[q_number], cq_desc,
309 completed_index, enic_wq_free_buf,
312 if (netif_queue_stopped(enic->netdev) &&
313 vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1)
314 netif_wake_queue(enic->netdev);
316 spin_unlock(&enic->wq_lock[q_number]);
321 static void enic_log_q_error(struct enic *enic)
326 for (i = 0; i < enic->wq_count; i++) {
327 error_status = vnic_wq_error_status(&enic->wq[i]);
329 printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
330 enic->netdev->name, i, error_status);
333 for (i = 0; i < enic->rq_count; i++) {
334 error_status = vnic_rq_error_status(&enic->rq[i]);
336 printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
337 enic->netdev->name, i, error_status);
341 static void enic_link_check(struct enic *enic)
343 int link_status = vnic_dev_link_status(enic->vdev);
344 int carrier_ok = netif_carrier_ok(enic->netdev);
346 if (link_status && !carrier_ok) {
347 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
348 netif_carrier_on(enic->netdev);
349 } else if (!link_status && carrier_ok) {
350 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
351 netif_carrier_off(enic->netdev);
355 static void enic_mtu_check(struct enic *enic)
357 u32 mtu = vnic_dev_mtu(enic->vdev);
359 if (mtu != enic->port_mtu) {
360 if (mtu < enic->netdev->mtu)
361 printk(KERN_WARNING PFX
362 "%s: interface MTU (%d) set higher "
363 "than switch port MTU (%d)\n",
364 enic->netdev->name, enic->netdev->mtu, mtu);
365 enic->port_mtu = mtu;
369 static void enic_msglvl_check(struct enic *enic)
371 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
373 if (msg_enable != enic->msg_enable) {
374 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
375 enic->netdev->name, enic->msg_enable, msg_enable);
376 enic->msg_enable = msg_enable;
380 static void enic_notify_check(struct enic *enic)
382 enic_msglvl_check(enic);
383 enic_mtu_check(enic);
384 enic_link_check(enic);
387 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
389 static irqreturn_t enic_isr_legacy(int irq, void *data)
391 struct net_device *netdev = data;
392 struct enic *enic = netdev_priv(netdev);
395 vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
397 pba = vnic_intr_legacy_pba(enic->legacy_pba);
399 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
400 return IRQ_NONE; /* not our interrupt */
403 if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
404 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
405 enic_notify_check(enic);
408 if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
409 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
410 enic_log_q_error(enic);
411 /* schedule recovery from WQ/RQ error */
412 schedule_work(&enic->reset);
416 if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
417 if (napi_schedule_prep(&enic->napi))
418 __napi_schedule(&enic->napi);
420 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
426 static irqreturn_t enic_isr_msi(int irq, void *data)
428 struct enic *enic = data;
430 /* With MSI, there is no sharing of interrupts, so this is
431 * our interrupt and there is no need to ack it. The device
432 * is not providing per-vector masking, so the OS will not
433 * write to PCI config space to mask/unmask the interrupt.
434 * We're using mask_on_assertion for MSI, so the device
435 * automatically masks the interrupt when the interrupt is
436 * generated. Later, when exiting polling, the interrupt
437 * will be unmasked (see enic_poll).
439 * Also, the device uses the same PCIe Traffic Class (TC)
440 * for Memory Write data and MSI, so there are no ordering
441 * issues; the MSI will always arrive at the Root Complex
442 * _after_ corresponding Memory Writes (i.e. descriptor
446 napi_schedule(&enic->napi);
451 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
453 struct enic *enic = data;
455 /* schedule NAPI polling for RQ cleanup */
456 napi_schedule(&enic->napi);
461 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
463 struct enic *enic = data;
464 unsigned int wq_work_to_do = -1; /* no limit */
465 unsigned int wq_work_done;
467 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
468 wq_work_to_do, enic_wq_service, NULL);
470 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
473 1 /* reset intr timer */);
478 static irqreturn_t enic_isr_msix_err(int irq, void *data)
480 struct enic *enic = data;
482 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
484 enic_log_q_error(enic);
486 /* schedule recovery from WQ/RQ error */
487 schedule_work(&enic->reset);
492 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
494 struct enic *enic = data;
496 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
497 enic_notify_check(enic);
502 static inline void enic_queue_wq_skb_cont(struct enic *enic,
503 struct vnic_wq *wq, struct sk_buff *skb,
504 unsigned int len_left)
508 /* Queue additional data fragments */
509 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
510 len_left -= frag->size;
511 enic_queue_wq_desc_cont(wq, skb,
512 pci_map_page(enic->pdev, frag->page,
513 frag->page_offset, frag->size,
516 (len_left == 0)); /* EOP? */
520 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
521 struct vnic_wq *wq, struct sk_buff *skb,
522 int vlan_tag_insert, unsigned int vlan_tag)
524 unsigned int head_len = skb_headlen(skb);
525 unsigned int len_left = skb->len - head_len;
526 int eop = (len_left == 0);
528 /* Queue the main skb fragment */
529 enic_queue_wq_desc(wq, skb,
530 pci_map_single(enic->pdev, skb->data,
531 head_len, PCI_DMA_TODEVICE),
533 vlan_tag_insert, vlan_tag,
537 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
540 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
541 struct vnic_wq *wq, struct sk_buff *skb,
542 int vlan_tag_insert, unsigned int vlan_tag)
544 unsigned int head_len = skb_headlen(skb);
545 unsigned int len_left = skb->len - head_len;
546 unsigned int hdr_len = skb_transport_offset(skb);
547 unsigned int csum_offset = hdr_len + skb->csum_offset;
548 int eop = (len_left == 0);
550 /* Queue the main skb fragment */
551 enic_queue_wq_desc_csum_l4(wq, skb,
552 pci_map_single(enic->pdev, skb->data,
553 head_len, PCI_DMA_TODEVICE),
557 vlan_tag_insert, vlan_tag,
561 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
564 static inline void enic_queue_wq_skb_tso(struct enic *enic,
565 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
566 int vlan_tag_insert, unsigned int vlan_tag)
568 unsigned int head_len = skb_headlen(skb);
569 unsigned int len_left = skb->len - head_len;
570 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
571 int eop = (len_left == 0);
573 /* Preload TCP csum field with IP pseudo hdr calculated
574 * with IP length set to zero. HW will later add in length
575 * to each TCP segment resulting from the TSO.
578 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
579 ip_hdr(skb)->check = 0;
580 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
581 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
582 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
583 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
584 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
587 /* Queue the main skb fragment */
588 enic_queue_wq_desc_tso(wq, skb,
589 pci_map_single(enic->pdev, skb->data,
590 head_len, PCI_DMA_TODEVICE),
593 vlan_tag_insert, vlan_tag,
597 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
600 static inline void enic_queue_wq_skb(struct enic *enic,
601 struct vnic_wq *wq, struct sk_buff *skb)
603 unsigned int mss = skb_shinfo(skb)->gso_size;
604 unsigned int vlan_tag = 0;
605 int vlan_tag_insert = 0;
607 if (enic->vlan_group && vlan_tx_tag_present(skb)) {
608 /* VLAN tag from trunking driver */
610 vlan_tag = vlan_tx_tag_get(skb);
614 enic_queue_wq_skb_tso(enic, wq, skb, mss,
615 vlan_tag_insert, vlan_tag);
616 else if (skb->ip_summed == CHECKSUM_PARTIAL)
617 enic_queue_wq_skb_csum_l4(enic, wq, skb,
618 vlan_tag_insert, vlan_tag);
620 enic_queue_wq_skb_vlan(enic, wq, skb,
621 vlan_tag_insert, vlan_tag);
624 /* netif_tx_lock held, process context with BHs disabled, or BH */
625 static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
627 struct enic *enic = netdev_priv(netdev);
628 struct vnic_wq *wq = &enic->wq[0];
636 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
637 * which is very likely. In the off chance it's going to take
638 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
641 if (skb_shinfo(skb)->gso_size == 0 &&
642 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
643 skb_linearize(skb)) {
648 spin_lock_irqsave(&enic->wq_lock[0], flags);
650 if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) {
651 netif_stop_queue(netdev);
652 /* This is a hard error, log it */
653 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
654 "queue awake!\n", netdev->name);
655 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
656 return NETDEV_TX_BUSY;
659 enic_queue_wq_skb(enic, wq, skb);
661 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
662 netif_stop_queue(netdev);
664 netdev->trans_start = jiffies;
666 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
671 /* dev_base_lock rwlock held, nominally process context */
672 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
674 struct enic *enic = netdev_priv(netdev);
675 struct net_device_stats *net_stats = &netdev->stats;
676 struct vnic_stats *stats;
678 spin_lock(&enic->devcmd_lock);
679 vnic_dev_stats_dump(enic->vdev, &stats);
680 spin_unlock(&enic->devcmd_lock);
682 net_stats->tx_packets = stats->tx.tx_frames_ok;
683 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
684 net_stats->tx_errors = stats->tx.tx_errors;
685 net_stats->tx_dropped = stats->tx.tx_drops;
687 net_stats->rx_packets = stats->rx.rx_frames_ok;
688 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
689 net_stats->rx_errors = stats->rx.rx_errors;
690 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
691 net_stats->rx_crc_errors = stats->rx.rx_crc_errors;
692 net_stats->rx_dropped = stats->rx.rx_no_bufs;
697 static void enic_reset_mcaddrs(struct enic *enic)
702 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
704 if (!is_valid_ether_addr(addr))
705 return -EADDRNOTAVAIL;
707 memcpy(netdev->dev_addr, addr, netdev->addr_len);
712 /* netif_tx_lock held, BHs disabled */
713 static void enic_set_multicast_list(struct net_device *netdev)
715 struct enic *enic = netdev_priv(netdev);
716 struct dev_mc_list *list = netdev->mc_list;
718 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
719 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
720 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
721 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
722 (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
723 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
724 unsigned int mc_count = netdev->mc_count;
727 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
728 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
730 spin_lock(&enic->devcmd_lock);
732 vnic_dev_packet_filter(enic->vdev, directed,
733 multicast, broadcast, promisc, allmulti);
735 /* Is there an easier way? Trying to minimize to
736 * calls to add/del multicast addrs. We keep the
737 * addrs from the last call in enic->mc_addr and
738 * look for changes to add/del.
741 for (i = 0; list && i < mc_count; i++) {
742 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
746 for (i = 0; i < enic->mc_count; i++) {
747 for (j = 0; j < mc_count; j++)
748 if (compare_ether_addr(enic->mc_addr[i],
752 enic_del_multicast_addr(enic, enic->mc_addr[i]);
755 for (i = 0; i < mc_count; i++) {
756 for (j = 0; j < enic->mc_count; j++)
757 if (compare_ether_addr(mc_addr[i],
758 enic->mc_addr[j]) == 0)
760 if (j == enic->mc_count)
761 enic_add_multicast_addr(enic, mc_addr[i]);
764 /* Save the list to compare against next time
767 for (i = 0; i < mc_count; i++)
768 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
770 enic->mc_count = mc_count;
772 spin_unlock(&enic->devcmd_lock);
775 /* rtnl lock is held */
776 static void enic_vlan_rx_register(struct net_device *netdev,
777 struct vlan_group *vlan_group)
779 struct enic *enic = netdev_priv(netdev);
780 enic->vlan_group = vlan_group;
783 /* rtnl lock is held */
784 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
786 struct enic *enic = netdev_priv(netdev);
788 spin_lock(&enic->devcmd_lock);
789 enic_add_vlan(enic, vid);
790 spin_unlock(&enic->devcmd_lock);
793 /* rtnl lock is held */
794 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
796 struct enic *enic = netdev_priv(netdev);
798 spin_lock(&enic->devcmd_lock);
799 enic_del_vlan(enic, vid);
800 spin_unlock(&enic->devcmd_lock);
803 /* netif_tx_lock held, BHs disabled */
804 static void enic_tx_timeout(struct net_device *netdev)
806 struct enic *enic = netdev_priv(netdev);
807 schedule_work(&enic->reset);
810 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
812 struct enic *enic = vnic_dev_priv(rq->vdev);
817 pci_unmap_single(enic->pdev, buf->dma_addr,
818 buf->len, PCI_DMA_FROMDEVICE);
819 dev_kfree_skb_any(buf->os_buf);
822 static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size)
826 skb = dev_alloc_skb(size + NET_IP_ALIGN);
829 skb_reserve(skb, NET_IP_ALIGN);
834 static int enic_rq_alloc_buf(struct vnic_rq *rq)
836 struct enic *enic = vnic_dev_priv(rq->vdev);
838 unsigned int len = enic->netdev->mtu + ETH_HLEN;
839 unsigned int os_buf_index = 0;
842 skb = enic_rq_alloc_skb(len);
846 dma_addr = pci_map_single(enic->pdev, skb->data,
847 len, PCI_DMA_FROMDEVICE);
849 enic_queue_rq_desc(rq, skb, os_buf_index,
855 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
856 void **tcph, u64 *hdr_flags, void *priv)
858 struct cq_enet_rq_desc *cq_desc = priv;
862 u8 type, color, eop, sop, ingress_port, vlan_stripped;
863 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
864 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
865 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
867 u16 q_number, completed_index, bytes_written, vlan, checksum;
870 cq_enet_rq_desc_dec(cq_desc,
871 &type, &color, &q_number, &completed_index,
872 &ingress_port, &fcoe, &eop, &sop, &rss_type,
873 &csum_not_calc, &rss_hash, &bytes_written,
874 &packet_error, &vlan_stripped, &vlan, &checksum,
875 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
876 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
877 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
880 if (!(ipv4 && tcp && !ipv4_fragment))
883 skb_reset_network_header(skb);
886 ip_len = ip_hdrlen(skb);
887 skb_set_transport_header(skb, ip_len);
889 /* check if ip header and tcp header are complete */
890 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
893 *hdr_flags = LRO_IPV4 | LRO_TCP;
894 *tcph = tcp_hdr(skb);
900 static void enic_rq_indicate_buf(struct vnic_rq *rq,
901 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
902 int skipped, void *opaque)
904 struct enic *enic = vnic_dev_priv(rq->vdev);
905 struct net_device *netdev = enic->netdev;
908 u8 type, color, eop, sop, ingress_port, vlan_stripped;
909 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
910 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
911 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
913 u16 q_number, completed_index, bytes_written, vlan, checksum;
920 prefetch(skb->data - NET_IP_ALIGN);
921 pci_unmap_single(enic->pdev, buf->dma_addr,
922 buf->len, PCI_DMA_FROMDEVICE);
924 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
925 &type, &color, &q_number, &completed_index,
926 &ingress_port, &fcoe, &eop, &sop, &rss_type,
927 &csum_not_calc, &rss_hash, &bytes_written,
928 &packet_error, &vlan_stripped, &vlan, &checksum,
929 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
930 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
931 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
936 if (bytes_written > 0 && !fcs_ok) {
939 "%s: packet error: bad FCS\n",
943 dev_kfree_skb_any(skb);
948 if (eop && bytes_written > 0) {
953 skb_put(skb, bytes_written);
954 skb->protocol = eth_type_trans(skb, netdev);
956 if (enic->csum_rx_enabled && !csum_not_calc) {
957 skb->csum = htons(checksum);
958 skb->ip_summed = CHECKSUM_COMPLETE;
963 if (enic->vlan_group && vlan_stripped) {
965 if ((netdev->features & NETIF_F_LRO) && ipv4)
966 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
967 skb, enic->vlan_group,
970 vlan_hwaccel_receive_skb(skb,
971 enic->vlan_group, vlan);
975 if ((netdev->features & NETIF_F_LRO) && ipv4)
976 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
978 netif_receive_skb(skb);
987 dev_kfree_skb_any(skb);
991 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
992 u8 type, u16 q_number, u16 completed_index, void *opaque)
994 struct enic *enic = vnic_dev_priv(vdev);
996 vnic_rq_service(&enic->rq[q_number], cq_desc,
997 completed_index, VNIC_RQ_RETURN_DESC,
998 enic_rq_indicate_buf, opaque);
1003 static void enic_rq_drop_buf(struct vnic_rq *rq,
1004 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1005 int skipped, void *opaque)
1007 struct enic *enic = vnic_dev_priv(rq->vdev);
1008 struct sk_buff *skb = buf->os_buf;
1013 pci_unmap_single(enic->pdev, buf->dma_addr,
1014 buf->len, PCI_DMA_FROMDEVICE);
1016 dev_kfree_skb_any(skb);
1019 static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1020 u8 type, u16 q_number, u16 completed_index, void *opaque)
1022 struct enic *enic = vnic_dev_priv(vdev);
1024 vnic_rq_service(&enic->rq[q_number], cq_desc,
1025 completed_index, VNIC_RQ_RETURN_DESC,
1026 enic_rq_drop_buf, opaque);
1031 static int enic_poll(struct napi_struct *napi, int budget)
1033 struct enic *enic = container_of(napi, struct enic, napi);
1034 struct net_device *netdev = enic->netdev;
1035 unsigned int rq_work_to_do = budget;
1036 unsigned int wq_work_to_do = -1; /* no limit */
1037 unsigned int work_done, rq_work_done, wq_work_done;
1039 /* Service RQ (first) and WQ
1042 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1043 rq_work_to_do, enic_rq_service, NULL);
1045 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1046 wq_work_to_do, enic_wq_service, NULL);
1048 /* Accumulate intr event credits for this polling
1049 * cycle. An intr event is the completion of a
1050 * a WQ or RQ packet.
1053 work_done = rq_work_done + wq_work_done;
1056 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1058 0 /* don't unmask intr */,
1059 0 /* don't reset intr timer */);
1061 if (rq_work_done > 0) {
1066 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1070 /* If no work done, flush all LROs and exit polling
1073 if (netdev->features & NETIF_F_LRO)
1074 lro_flush_all(&enic->lro_mgr);
1076 napi_complete(napi);
1077 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1080 return rq_work_done;
1083 static int enic_poll_msix(struct napi_struct *napi, int budget)
1085 struct enic *enic = container_of(napi, struct enic, napi);
1086 struct net_device *netdev = enic->netdev;
1087 unsigned int work_to_do = budget;
1088 unsigned int work_done;
1093 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1094 work_to_do, enic_rq_service, NULL);
1096 if (work_done > 0) {
1101 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1103 /* Return intr event credits for this polling
1104 * cycle. An intr event is the completion of a
1108 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1110 0 /* don't unmask intr */,
1111 0 /* don't reset intr timer */);
1114 /* If no work done, flush all LROs and exit polling
1117 if (netdev->features & NETIF_F_LRO)
1118 lro_flush_all(&enic->lro_mgr);
1120 napi_complete(napi);
1121 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1127 static void enic_notify_timer(unsigned long data)
1129 struct enic *enic = (struct enic *)data;
1131 enic_notify_check(enic);
1133 mod_timer(&enic->notify_timer,
1134 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1137 static void enic_free_intr(struct enic *enic)
1139 struct net_device *netdev = enic->netdev;
1142 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1143 case VNIC_DEV_INTR_MODE_INTX:
1144 free_irq(enic->pdev->irq, netdev);
1146 case VNIC_DEV_INTR_MODE_MSI:
1147 free_irq(enic->pdev->irq, enic);
1149 case VNIC_DEV_INTR_MODE_MSIX:
1150 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1151 if (enic->msix[i].requested)
1152 free_irq(enic->msix_entry[i].vector,
1153 enic->msix[i].devid);
1160 static int enic_request_intr(struct enic *enic)
1162 struct net_device *netdev = enic->netdev;
1166 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1168 case VNIC_DEV_INTR_MODE_INTX:
1170 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1171 IRQF_SHARED, netdev->name, netdev);
1174 case VNIC_DEV_INTR_MODE_MSI:
1176 err = request_irq(enic->pdev->irq, enic_isr_msi,
1177 0, netdev->name, enic);
1180 case VNIC_DEV_INTR_MODE_MSIX:
1182 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1183 "%.11s-rx-0", netdev->name);
1184 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1185 enic->msix[ENIC_MSIX_RQ].devid = enic;
1187 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1188 "%.11s-tx-0", netdev->name);
1189 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1190 enic->msix[ENIC_MSIX_WQ].devid = enic;
1192 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1193 "%.11s-err", netdev->name);
1194 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1195 enic->msix[ENIC_MSIX_ERR].devid = enic;
1197 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1198 "%.11s-notify", netdev->name);
1199 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1200 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1202 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1203 err = request_irq(enic->msix_entry[i].vector,
1204 enic->msix[i].isr, 0,
1205 enic->msix[i].devname,
1206 enic->msix[i].devid);
1208 enic_free_intr(enic);
1211 enic->msix[i].requested = 1;
1223 static int enic_notify_set(struct enic *enic)
1227 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1228 case VNIC_DEV_INTR_MODE_INTX:
1229 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1231 case VNIC_DEV_INTR_MODE_MSIX:
1232 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1235 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1242 static void enic_notify_timer_start(struct enic *enic)
1244 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1245 case VNIC_DEV_INTR_MODE_MSI:
1246 mod_timer(&enic->notify_timer, jiffies);
1249 /* Using intr for notification for INTx/MSI-X */
1254 /* rtnl lock is held, process context */
1255 static int enic_open(struct net_device *netdev)
1257 struct enic *enic = netdev_priv(netdev);
1261 err = enic_request_intr(enic);
1263 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1268 err = enic_notify_set(enic);
1271 "%s: Failed to alloc notify buffer, aborting.\n",
1273 goto err_out_free_intr;
1276 for (i = 0; i < enic->rq_count; i++) {
1277 err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1280 "%s: Unable to alloc receive buffers.\n",
1282 goto err_out_notify_unset;
1286 for (i = 0; i < enic->wq_count; i++)
1287 vnic_wq_enable(&enic->wq[i]);
1288 for (i = 0; i < enic->rq_count; i++)
1289 vnic_rq_enable(&enic->rq[i]);
1291 enic_add_station_addr(enic);
1292 enic_set_multicast_list(netdev);
1294 netif_wake_queue(netdev);
1295 napi_enable(&enic->napi);
1296 vnic_dev_enable(enic->vdev);
1298 for (i = 0; i < enic->intr_count; i++)
1299 vnic_intr_unmask(&enic->intr[i]);
1301 enic_notify_timer_start(enic);
1305 err_out_notify_unset:
1306 vnic_dev_notify_unset(enic->vdev);
1308 enic_free_intr(enic);
1313 /* rtnl lock is held, process context */
1314 static int enic_stop(struct net_device *netdev)
1316 struct enic *enic = netdev_priv(netdev);
1320 del_timer_sync(&enic->notify_timer);
1322 vnic_dev_disable(enic->vdev);
1323 napi_disable(&enic->napi);
1324 netif_stop_queue(netdev);
1326 for (i = 0; i < enic->intr_count; i++)
1327 vnic_intr_mask(&enic->intr[i]);
1329 for (i = 0; i < enic->wq_count; i++) {
1330 err = vnic_wq_disable(&enic->wq[i]);
1334 for (i = 0; i < enic->rq_count; i++) {
1335 err = vnic_rq_disable(&enic->rq[i]);
1340 vnic_dev_notify_unset(enic->vdev);
1341 enic_free_intr(enic);
1343 (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1344 -1, enic_rq_service_drop, NULL);
1345 (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1346 -1, enic_wq_service, NULL);
1348 for (i = 0; i < enic->wq_count; i++)
1349 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1350 for (i = 0; i < enic->rq_count; i++)
1351 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1352 for (i = 0; i < enic->cq_count; i++)
1353 vnic_cq_clean(&enic->cq[i]);
1354 for (i = 0; i < enic->intr_count; i++)
1355 vnic_intr_clean(&enic->intr[i]);
1360 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1362 struct enic *enic = netdev_priv(netdev);
1363 int running = netif_running(netdev);
1365 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1371 netdev->mtu = new_mtu;
1373 if (netdev->mtu > enic->port_mtu)
1374 printk(KERN_WARNING PFX
1375 "%s: interface MTU (%d) set higher "
1376 "than port MTU (%d)\n",
1377 netdev->name, netdev->mtu, enic->port_mtu);
1385 #ifdef CONFIG_NET_POLL_CONTROLLER
1386 static void enic_poll_controller(struct net_device *netdev)
1388 struct enic *enic = netdev_priv(netdev);
1389 struct vnic_dev *vdev = enic->vdev;
1391 switch (vnic_dev_get_intr_mode(vdev)) {
1392 case VNIC_DEV_INTR_MODE_MSIX:
1393 enic_isr_msix_rq(enic->pdev->irq, enic);
1394 enic_isr_msix_wq(enic->pdev->irq, enic);
1396 case VNIC_DEV_INTR_MODE_MSI:
1397 enic_isr_msi(enic->pdev->irq, enic);
1399 case VNIC_DEV_INTR_MODE_INTX:
1400 enic_isr_legacy(enic->pdev->irq, netdev);
1408 static int enic_dev_wait(struct vnic_dev *vdev,
1409 int (*start)(struct vnic_dev *, int),
1410 int (*finished)(struct vnic_dev *, int *),
1417 BUG_ON(in_interrupt());
1419 err = start(vdev, arg);
1423 /* Wait for func to complete...2 seconds max
1426 time = jiffies + (HZ * 2);
1429 err = finished(vdev, &done);
1436 schedule_timeout_uninterruptible(HZ / 10);
1438 } while (time_after(time, jiffies));
1443 static int enic_dev_open(struct enic *enic)
1447 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1448 vnic_dev_open_done, 0);
1451 "vNIC device open failed, err %d.\n", err);
1456 static int enic_dev_soft_reset(struct enic *enic)
1460 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1461 vnic_dev_soft_reset_done, 0);
1464 "vNIC soft reset failed, err %d.\n", err);
1469 static void enic_reset(struct work_struct *work)
1471 struct enic *enic = container_of(work, struct enic, reset);
1473 if (!netif_running(enic->netdev))
1478 spin_lock(&enic->devcmd_lock);
1479 vnic_dev_hang_notify(enic->vdev);
1480 spin_unlock(&enic->devcmd_lock);
1482 enic_stop(enic->netdev);
1483 enic_dev_soft_reset(enic);
1484 enic_reset_mcaddrs(enic);
1485 enic_init_vnic_resources(enic);
1486 enic_open(enic->netdev);
1491 static int enic_set_intr_mode(struct enic *enic)
1493 unsigned int n = ARRAY_SIZE(enic->rq);
1494 unsigned int m = ARRAY_SIZE(enic->wq);
1497 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1498 * system capabilities.
1502 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1503 * (the second to last INTR is used for WQ/RQ errors)
1504 * (the last INTR is used for notifications)
1507 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1508 for (i = 0; i < n + m + 2; i++)
1509 enic->msix_entry[i].entry = i;
1511 if (enic->config.intr_mode < 1 &&
1512 enic->rq_count >= n &&
1513 enic->wq_count >= m &&
1514 enic->cq_count >= n + m &&
1515 enic->intr_count >= n + m + 2 &&
1516 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1520 enic->cq_count = n + m;
1521 enic->intr_count = n + m + 2;
1523 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1530 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1533 if (enic->config.intr_mode < 2 &&
1534 enic->rq_count >= 1 &&
1535 enic->wq_count >= 1 &&
1536 enic->cq_count >= 2 &&
1537 enic->intr_count >= 1 &&
1538 !pci_enable_msi(enic->pdev)) {
1543 enic->intr_count = 1;
1545 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1552 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1553 * (the first INTR is used for WQ/RQ)
1554 * (the second INTR is used for WQ/RQ errors)
1555 * (the last INTR is used for notifications)
1558 if (enic->config.intr_mode < 3 &&
1559 enic->rq_count >= 1 &&
1560 enic->wq_count >= 1 &&
1561 enic->cq_count >= 2 &&
1562 enic->intr_count >= 3) {
1567 enic->intr_count = 3;
1569 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1574 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1579 static void enic_clear_intr_mode(struct enic *enic)
1581 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1582 case VNIC_DEV_INTR_MODE_MSIX:
1583 pci_disable_msix(enic->pdev);
1585 case VNIC_DEV_INTR_MODE_MSI:
1586 pci_disable_msi(enic->pdev);
1592 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1595 static void enic_iounmap(struct enic *enic)
1597 if (enic->bar0.vaddr)
1598 iounmap(enic->bar0.vaddr);
1601 static const struct net_device_ops enic_netdev_ops = {
1602 .ndo_open = enic_open,
1603 .ndo_stop = enic_stop,
1604 .ndo_start_xmit = enic_hard_start_xmit,
1605 .ndo_get_stats = enic_get_stats,
1606 .ndo_validate_addr = eth_validate_addr,
1607 .ndo_set_mac_address = eth_mac_addr,
1608 .ndo_set_multicast_list = enic_set_multicast_list,
1609 .ndo_change_mtu = enic_change_mtu,
1610 .ndo_vlan_rx_register = enic_vlan_rx_register,
1611 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
1612 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
1613 .ndo_tx_timeout = enic_tx_timeout,
1614 #ifdef CONFIG_NET_POLL_CONTROLLER
1615 .ndo_poll_controller = enic_poll_controller,
1619 static int __devinit enic_probe(struct pci_dev *pdev,
1620 const struct pci_device_id *ent)
1622 struct net_device *netdev;
1628 const u8 rss_default_cpu = 0;
1629 const u8 rss_hash_type = 0;
1630 const u8 rss_hash_bits = 0;
1631 const u8 rss_base_cpu = 0;
1632 const u8 rss_enable = 0;
1633 const u8 tso_ipid_split_en = 0;
1634 const u8 ig_vlan_strip_en = 1;
1636 /* Allocate net device structure and initialize. Private
1637 * instance data is initialized to zero.
1640 netdev = alloc_etherdev(sizeof(struct enic));
1642 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1646 pci_set_drvdata(pdev, netdev);
1648 SET_NETDEV_DEV(netdev, &pdev->dev);
1650 enic = netdev_priv(netdev);
1651 enic->netdev = netdev;
1654 /* Setup PCI resources
1657 err = pci_enable_device(pdev);
1660 "Cannot enable PCI device, aborting.\n");
1661 goto err_out_free_netdev;
1664 err = pci_request_regions(pdev, DRV_NAME);
1667 "Cannot request PCI regions, aborting.\n");
1668 goto err_out_disable_device;
1671 pci_set_master(pdev);
1673 /* Query PCI controller on system for DMA addressing
1674 * limitation for the device. Try 40-bit first, and
1678 err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
1680 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1683 "No usable DMA configuration, aborting.\n");
1684 goto err_out_release_regions;
1686 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1689 "Unable to obtain 32-bit DMA "
1690 "for consistent allocations, aborting.\n");
1691 goto err_out_release_regions;
1694 err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
1697 "Unable to obtain 40-bit DMA "
1698 "for consistent allocations, aborting.\n");
1699 goto err_out_release_regions;
1704 /* Map vNIC resources from BAR0
1707 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1709 "BAR0 not memory-map'able, aborting.\n");
1711 goto err_out_release_regions;
1714 enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
1715 enic->bar0.bus_addr = pci_resource_start(pdev, 0);
1716 enic->bar0.len = pci_resource_len(pdev, 0);
1718 if (!enic->bar0.vaddr) {
1720 "Cannot memory-map BAR0 res hdr, aborting.\n");
1722 goto err_out_release_regions;
1725 /* Register vNIC device
1728 enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
1731 "vNIC registration failed, aborting.\n");
1733 goto err_out_iounmap;
1736 /* Issue device open to get device in known state
1739 err = enic_dev_open(enic);
1742 "vNIC dev open failed, aborting.\n");
1743 goto err_out_vnic_unregister;
1746 /* Issue device init to initialize the vnic-to-switch link.
1747 * We'll start with carrier off and wait for link UP
1748 * notification later to turn on carrier. We don't need
1749 * to wait here for the vnic-to-switch link initialization
1750 * to complete; link UP notification is the indication that
1751 * the process is complete.
1754 netif_carrier_off(netdev);
1756 err = vnic_dev_init(enic->vdev, 0);
1759 "vNIC dev init failed, aborting.\n");
1760 goto err_out_dev_close;
1763 /* Get vNIC configuration
1766 err = enic_get_vnic_config(enic);
1769 "Get vNIC configuration failed, aborting.\n");
1770 goto err_out_dev_close;
1773 /* Get available resource counts
1776 enic_get_res_counts(enic);
1778 /* Set interrupt mode based on resource counts and system
1782 err = enic_set_intr_mode(enic);
1785 "Failed to set intr mode, aborting.\n");
1786 goto err_out_dev_close;
1789 /* Allocate and configure vNIC resources
1792 err = enic_alloc_vnic_resources(enic);
1795 "Failed to alloc vNIC resources, aborting.\n");
1796 goto err_out_free_vnic_resources;
1799 enic_init_vnic_resources(enic);
1801 /* Enable VLAN tag stripping. RSS not enabled (yet).
1804 err = enic_set_nic_cfg(enic,
1805 rss_default_cpu, rss_hash_type,
1806 rss_hash_bits, rss_base_cpu,
1807 rss_enable, tso_ipid_split_en,
1811 "Failed to config nic, aborting.\n");
1812 goto err_out_free_vnic_resources;
1815 /* Setup notification timer, HW reset task, and locks
1818 init_timer(&enic->notify_timer);
1819 enic->notify_timer.function = enic_notify_timer;
1820 enic->notify_timer.data = (unsigned long)enic;
1822 INIT_WORK(&enic->reset, enic_reset);
1824 for (i = 0; i < enic->wq_count; i++)
1825 spin_lock_init(&enic->wq_lock[i]);
1827 spin_lock_init(&enic->devcmd_lock);
1829 /* Register net device
1832 enic->port_mtu = enic->config.mtu;
1833 (void)enic_change_mtu(netdev, enic->port_mtu);
1835 err = enic_set_mac_addr(netdev, enic->mac_addr);
1838 "Invalid MAC address, aborting.\n");
1839 goto err_out_free_vnic_resources;
1842 netdev->netdev_ops = &enic_netdev_ops;
1843 netdev->watchdog_timeo = 2 * HZ;
1844 netdev->ethtool_ops = &enic_ethtool_ops;
1846 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1848 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1850 case VNIC_DEV_INTR_MODE_MSIX:
1851 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1855 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1856 if (ENIC_SETTING(enic, TXCSUM))
1857 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1858 if (ENIC_SETTING(enic, TSO))
1859 netdev->features |= NETIF_F_TSO |
1860 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
1861 if (ENIC_SETTING(enic, LRO))
1862 netdev->features |= NETIF_F_LRO;
1864 netdev->features |= NETIF_F_HIGHDMA;
1867 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
1869 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
1870 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
1871 enic->lro_mgr.lro_arr = enic->lro_desc;
1872 enic->lro_mgr.get_skb_header = enic_get_skb_header;
1873 enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1874 enic->lro_mgr.dev = netdev;
1875 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
1876 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1879 err = register_netdev(netdev);
1882 "Cannot register net device, aborting.\n");
1883 goto err_out_free_vnic_resources;
1888 err_out_free_vnic_resources:
1889 enic_free_vnic_resources(enic);
1891 vnic_dev_close(enic->vdev);
1892 err_out_vnic_unregister:
1893 enic_clear_intr_mode(enic);
1894 vnic_dev_unregister(enic->vdev);
1897 err_out_release_regions:
1898 pci_release_regions(pdev);
1899 err_out_disable_device:
1900 pci_disable_device(pdev);
1901 err_out_free_netdev:
1902 pci_set_drvdata(pdev, NULL);
1903 free_netdev(netdev);
1908 static void __devexit enic_remove(struct pci_dev *pdev)
1910 struct net_device *netdev = pci_get_drvdata(pdev);
1913 struct enic *enic = netdev_priv(netdev);
1915 flush_scheduled_work();
1916 unregister_netdev(netdev);
1917 enic_free_vnic_resources(enic);
1918 vnic_dev_close(enic->vdev);
1919 enic_clear_intr_mode(enic);
1920 vnic_dev_unregister(enic->vdev);
1922 pci_release_regions(pdev);
1923 pci_disable_device(pdev);
1924 pci_set_drvdata(pdev, NULL);
1925 free_netdev(netdev);
1929 static struct pci_driver enic_driver = {
1931 .id_table = enic_id_table,
1932 .probe = enic_probe,
1933 .remove = __devexit_p(enic_remove),
1936 static int __init enic_init_module(void)
1938 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1940 return pci_register_driver(&enic_driver);
1943 static void __exit enic_cleanup_module(void)
1945 pci_unregister_driver(&enic_driver);
1948 module_init(enic_init_module);
1949 module_exit(enic_cleanup_module);