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/interrupt.h>
27 #include <linux/workqueue.h>
28 #include <linux/pci.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
32 #include <linux/if_ether.h>
33 #include <linux/if_vlan.h>
36 #include <linux/ipv6.h>
37 #include <linux/tcp.h>
38 #include <linux/rtnetlink.h>
39 #include <linux/prefetch.h>
40 #include <net/ip6_checksum.h>
41 #include <linux/ktime.h>
42 #ifdef CONFIG_RFS_ACCEL
43 #include <linux/cpu_rmap.h>
45 #ifdef CONFIG_NET_RX_BUSY_POLL
46 #include <net/busy_poll.h>
48 #include <linux/crash_dump.h>
50 #include "cq_enet_desc.h"
52 #include "vnic_intr.h"
53 #include "vnic_stats.h"
59 #include "enic_clsf.h"
61 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
62 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
63 #define MAX_TSO (1 << 16)
64 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
66 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
67 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
68 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */
70 #define RX_COPYBREAK_DEFAULT 256
72 /* Supported devices */
73 static const struct pci_device_id enic_id_table[] = {
74 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
75 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
76 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
77 { 0, } /* end of table */
80 MODULE_DESCRIPTION(DRV_DESCRIPTION);
81 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
82 MODULE_LICENSE("GPL");
83 MODULE_VERSION(DRV_VERSION);
84 MODULE_DEVICE_TABLE(pci, enic_id_table);
86 #define ENIC_LARGE_PKT_THRESHOLD 1000
87 #define ENIC_MAX_COALESCE_TIMERS 10
88 /* Interrupt moderation table, which will be used to decide the
89 * coalescing timer values
90 * {rx_rate in Mbps, mapping percentage of the range}
92 static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = {
106 /* This table helps the driver to pick different ranges for rx coalescing
107 * timer depending on the link speed.
109 static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = {
110 {0, 0}, /* 0 - 4 Gbps */
111 {0, 3}, /* 4 - 10 Gbps */
112 {3, 6}, /* 10 - 40 Gbps */
115 int enic_is_dynamic(struct enic *enic)
117 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
120 int enic_sriov_enabled(struct enic *enic)
122 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
125 static int enic_is_sriov_vf(struct enic *enic)
127 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
130 int enic_is_valid_vf(struct enic *enic, int vf)
132 #ifdef CONFIG_PCI_IOV
133 return vf >= 0 && vf < enic->num_vfs;
139 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
141 struct enic *enic = vnic_dev_priv(wq->vdev);
144 pci_unmap_single(enic->pdev, buf->dma_addr,
145 buf->len, PCI_DMA_TODEVICE);
147 pci_unmap_page(enic->pdev, buf->dma_addr,
148 buf->len, PCI_DMA_TODEVICE);
151 dev_kfree_skb_any(buf->os_buf);
154 static void enic_wq_free_buf(struct vnic_wq *wq,
155 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
157 enic_free_wq_buf(wq, buf);
160 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
161 u8 type, u16 q_number, u16 completed_index, void *opaque)
163 struct enic *enic = vnic_dev_priv(vdev);
165 spin_lock(&enic->wq_lock[q_number]);
167 vnic_wq_service(&enic->wq[q_number], cq_desc,
168 completed_index, enic_wq_free_buf,
171 if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
172 vnic_wq_desc_avail(&enic->wq[q_number]) >=
173 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
174 netif_wake_subqueue(enic->netdev, q_number);
176 spin_unlock(&enic->wq_lock[q_number]);
181 static void enic_log_q_error(struct enic *enic)
186 for (i = 0; i < enic->wq_count; i++) {
187 error_status = vnic_wq_error_status(&enic->wq[i]);
189 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
193 for (i = 0; i < enic->rq_count; i++) {
194 error_status = vnic_rq_error_status(&enic->rq[i]);
196 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
201 static void enic_msglvl_check(struct enic *enic)
203 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
205 if (msg_enable != enic->msg_enable) {
206 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
207 enic->msg_enable, msg_enable);
208 enic->msg_enable = msg_enable;
212 static void enic_mtu_check(struct enic *enic)
214 u32 mtu = vnic_dev_mtu(enic->vdev);
215 struct net_device *netdev = enic->netdev;
217 if (mtu && mtu != enic->port_mtu) {
218 enic->port_mtu = mtu;
219 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
220 mtu = max_t(int, ENIC_MIN_MTU,
221 min_t(int, ENIC_MAX_MTU, mtu));
222 if (mtu != netdev->mtu)
223 schedule_work(&enic->change_mtu_work);
225 if (mtu < netdev->mtu)
227 "interface MTU (%d) set higher "
228 "than switch port MTU (%d)\n",
234 static void enic_link_check(struct enic *enic)
236 int link_status = vnic_dev_link_status(enic->vdev);
237 int carrier_ok = netif_carrier_ok(enic->netdev);
239 if (link_status && !carrier_ok) {
240 netdev_info(enic->netdev, "Link UP\n");
241 netif_carrier_on(enic->netdev);
242 } else if (!link_status && carrier_ok) {
243 netdev_info(enic->netdev, "Link DOWN\n");
244 netif_carrier_off(enic->netdev);
248 static void enic_notify_check(struct enic *enic)
250 enic_msglvl_check(enic);
251 enic_mtu_check(enic);
252 enic_link_check(enic);
255 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
257 static irqreturn_t enic_isr_legacy(int irq, void *data)
259 struct net_device *netdev = data;
260 struct enic *enic = netdev_priv(netdev);
261 unsigned int io_intr = enic_legacy_io_intr();
262 unsigned int err_intr = enic_legacy_err_intr();
263 unsigned int notify_intr = enic_legacy_notify_intr();
266 vnic_intr_mask(&enic->intr[io_intr]);
268 pba = vnic_intr_legacy_pba(enic->legacy_pba);
270 vnic_intr_unmask(&enic->intr[io_intr]);
271 return IRQ_NONE; /* not our interrupt */
274 if (ENIC_TEST_INTR(pba, notify_intr)) {
275 enic_notify_check(enic);
276 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
279 if (ENIC_TEST_INTR(pba, err_intr)) {
280 vnic_intr_return_all_credits(&enic->intr[err_intr]);
281 enic_log_q_error(enic);
282 /* schedule recovery from WQ/RQ error */
283 schedule_work(&enic->reset);
287 if (ENIC_TEST_INTR(pba, io_intr))
288 napi_schedule_irqoff(&enic->napi[0]);
290 vnic_intr_unmask(&enic->intr[io_intr]);
295 static irqreturn_t enic_isr_msi(int irq, void *data)
297 struct enic *enic = data;
299 /* With MSI, there is no sharing of interrupts, so this is
300 * our interrupt and there is no need to ack it. The device
301 * is not providing per-vector masking, so the OS will not
302 * write to PCI config space to mask/unmask the interrupt.
303 * We're using mask_on_assertion for MSI, so the device
304 * automatically masks the interrupt when the interrupt is
305 * generated. Later, when exiting polling, the interrupt
306 * will be unmasked (see enic_poll).
308 * Also, the device uses the same PCIe Traffic Class (TC)
309 * for Memory Write data and MSI, so there are no ordering
310 * issues; the MSI will always arrive at the Root Complex
311 * _after_ corresponding Memory Writes (i.e. descriptor
315 napi_schedule_irqoff(&enic->napi[0]);
320 static irqreturn_t enic_isr_msix(int irq, void *data)
322 struct napi_struct *napi = data;
324 napi_schedule_irqoff(napi);
329 static irqreturn_t enic_isr_msix_err(int irq, void *data)
331 struct enic *enic = data;
332 unsigned int intr = enic_msix_err_intr(enic);
334 vnic_intr_return_all_credits(&enic->intr[intr]);
336 enic_log_q_error(enic);
338 /* schedule recovery from WQ/RQ error */
339 schedule_work(&enic->reset);
344 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
346 struct enic *enic = data;
347 unsigned int intr = enic_msix_notify_intr(enic);
349 enic_notify_check(enic);
350 vnic_intr_return_all_credits(&enic->intr[intr]);
355 static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq,
356 struct sk_buff *skb, unsigned int len_left,
359 const skb_frag_t *frag;
362 /* Queue additional data fragments */
363 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
364 len_left -= skb_frag_size(frag);
365 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0,
368 if (unlikely(enic_dma_map_check(enic, dma_addr)))
370 enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag),
371 (len_left == 0), /* EOP? */
378 static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
379 struct sk_buff *skb, int vlan_tag_insert,
380 unsigned int vlan_tag, int loopback)
382 unsigned int head_len = skb_headlen(skb);
383 unsigned int len_left = skb->len - head_len;
384 int eop = (len_left == 0);
388 dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
390 if (unlikely(enic_dma_map_check(enic, dma_addr)))
393 /* Queue the main skb fragment. The fragments are no larger
394 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
395 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
396 * per fragment is queued.
398 enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert,
399 vlan_tag, eop, loopback);
402 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
407 static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
408 struct sk_buff *skb, int vlan_tag_insert,
409 unsigned int vlan_tag, int loopback)
411 unsigned int head_len = skb_headlen(skb);
412 unsigned int len_left = skb->len - head_len;
413 unsigned int hdr_len = skb_checksum_start_offset(skb);
414 unsigned int csum_offset = hdr_len + skb->csum_offset;
415 int eop = (len_left == 0);
419 dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
421 if (unlikely(enic_dma_map_check(enic, dma_addr)))
424 /* Queue the main skb fragment. The fragments are no larger
425 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
426 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
427 * per fragment is queued.
429 enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset,
430 hdr_len, vlan_tag_insert, vlan_tag, eop,
434 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
439 static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
440 struct sk_buff *skb, unsigned int mss,
441 int vlan_tag_insert, unsigned int vlan_tag,
444 unsigned int frag_len_left = skb_headlen(skb);
445 unsigned int len_left = skb->len - frag_len_left;
446 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
447 int eop = (len_left == 0);
450 unsigned int offset = 0;
453 /* Preload TCP csum field with IP pseudo hdr calculated
454 * with IP length set to zero. HW will later add in length
455 * to each TCP segment resulting from the TSO.
458 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
459 ip_hdr(skb)->check = 0;
460 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
461 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
462 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
463 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
464 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
467 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
468 * for the main skb fragment
470 while (frag_len_left) {
471 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
472 dma_addr = pci_map_single(enic->pdev, skb->data + offset, len,
474 if (unlikely(enic_dma_map_check(enic, dma_addr)))
476 enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len,
477 vlan_tag_insert, vlan_tag,
478 eop && (len == frag_len_left), loopback);
479 frag_len_left -= len;
486 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
487 * for additional data fragments
489 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
490 len_left -= skb_frag_size(frag);
491 frag_len_left = skb_frag_size(frag);
494 while (frag_len_left) {
495 len = min(frag_len_left,
496 (unsigned int)WQ_ENET_MAX_DESC_LEN);
497 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
500 if (unlikely(enic_dma_map_check(enic, dma_addr)))
502 enic_queue_wq_desc_cont(wq, skb, dma_addr, len,
504 (len == frag_len_left),/*EOP*/
506 frag_len_left -= len;
514 static inline void enic_queue_wq_skb(struct enic *enic,
515 struct vnic_wq *wq, struct sk_buff *skb)
517 unsigned int mss = skb_shinfo(skb)->gso_size;
518 unsigned int vlan_tag = 0;
519 int vlan_tag_insert = 0;
523 if (skb_vlan_tag_present(skb)) {
524 /* VLAN tag from trunking driver */
526 vlan_tag = skb_vlan_tag_get(skb);
527 } else if (enic->loop_enable) {
528 vlan_tag = enic->loop_tag;
533 err = enic_queue_wq_skb_tso(enic, wq, skb, mss,
534 vlan_tag_insert, vlan_tag,
536 else if (skb->ip_summed == CHECKSUM_PARTIAL)
537 err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
540 err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert,
543 struct vnic_wq_buf *buf;
545 buf = wq->to_use->prev;
546 /* while not EOP of previous pkt && queue not empty.
547 * For all non EOP bufs, os_buf is NULL.
549 while (!buf->os_buf && (buf->next != wq->to_clean)) {
550 enic_free_wq_buf(wq, buf);
551 wq->ring.desc_avail++;
554 wq->to_use = buf->next;
559 /* netif_tx_lock held, process context with BHs disabled, or BH */
560 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
561 struct net_device *netdev)
563 struct enic *enic = netdev_priv(netdev);
565 unsigned int txq_map;
566 struct netdev_queue *txq;
569 dev_kfree_skb_any(skb);
573 txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
574 wq = &enic->wq[txq_map];
575 txq = netdev_get_tx_queue(netdev, txq_map);
577 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
578 * which is very likely. In the off chance it's going to take
579 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
582 if (skb_shinfo(skb)->gso_size == 0 &&
583 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
584 skb_linearize(skb)) {
585 dev_kfree_skb_any(skb);
589 spin_lock(&enic->wq_lock[txq_map]);
591 if (vnic_wq_desc_avail(wq) <
592 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
593 netif_tx_stop_queue(txq);
594 /* This is a hard error, log it */
595 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
596 spin_unlock(&enic->wq_lock[txq_map]);
597 return NETDEV_TX_BUSY;
600 enic_queue_wq_skb(enic, wq, skb);
602 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
603 netif_tx_stop_queue(txq);
604 if (!skb->xmit_more || netif_xmit_stopped(txq))
605 vnic_wq_doorbell(wq);
607 spin_unlock(&enic->wq_lock[txq_map]);
612 /* dev_base_lock rwlock held, nominally process context */
613 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
614 struct rtnl_link_stats64 *net_stats)
616 struct enic *enic = netdev_priv(netdev);
617 struct vnic_stats *stats;
620 err = enic_dev_stats_dump(enic, &stats);
621 /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
622 * For other failures, like devcmd failure, we return previously
628 net_stats->tx_packets = stats->tx.tx_frames_ok;
629 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
630 net_stats->tx_errors = stats->tx.tx_errors;
631 net_stats->tx_dropped = stats->tx.tx_drops;
633 net_stats->rx_packets = stats->rx.rx_frames_ok;
634 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
635 net_stats->rx_errors = stats->rx.rx_errors;
636 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
637 net_stats->rx_over_errors = enic->rq_truncated_pkts;
638 net_stats->rx_crc_errors = enic->rq_bad_fcs;
639 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
644 static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
646 struct enic *enic = netdev_priv(netdev);
648 if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
649 unsigned int mc_count = netdev_mc_count(netdev);
651 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
652 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
657 enic_dev_add_addr(enic, mc_addr);
663 static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
665 struct enic *enic = netdev_priv(netdev);
667 enic_dev_del_addr(enic, mc_addr);
673 static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
675 struct enic *enic = netdev_priv(netdev);
677 if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
678 unsigned int uc_count = netdev_uc_count(netdev);
680 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
681 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
686 enic_dev_add_addr(enic, uc_addr);
692 static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
694 struct enic *enic = netdev_priv(netdev);
696 enic_dev_del_addr(enic, uc_addr);
702 void enic_reset_addr_lists(struct enic *enic)
704 struct net_device *netdev = enic->netdev;
706 __dev_uc_unsync(netdev, NULL);
707 __dev_mc_unsync(netdev, NULL);
714 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
716 struct enic *enic = netdev_priv(netdev);
718 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
719 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
720 return -EADDRNOTAVAIL;
722 if (!is_valid_ether_addr(addr))
723 return -EADDRNOTAVAIL;
726 memcpy(netdev->dev_addr, addr, netdev->addr_len);
731 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
733 struct enic *enic = netdev_priv(netdev);
734 struct sockaddr *saddr = p;
735 char *addr = saddr->sa_data;
738 if (netif_running(enic->netdev)) {
739 err = enic_dev_del_station_addr(enic);
744 err = enic_set_mac_addr(netdev, addr);
748 if (netif_running(enic->netdev)) {
749 err = enic_dev_add_station_addr(enic);
757 static int enic_set_mac_address(struct net_device *netdev, void *p)
759 struct sockaddr *saddr = p;
760 char *addr = saddr->sa_data;
761 struct enic *enic = netdev_priv(netdev);
764 err = enic_dev_del_station_addr(enic);
768 err = enic_set_mac_addr(netdev, addr);
772 return enic_dev_add_station_addr(enic);
775 /* netif_tx_lock held, BHs disabled */
776 static void enic_set_rx_mode(struct net_device *netdev)
778 struct enic *enic = netdev_priv(netdev);
780 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
781 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
782 int promisc = (netdev->flags & IFF_PROMISC) ||
783 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
784 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
785 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
786 unsigned int flags = netdev->flags |
787 (allmulti ? IFF_ALLMULTI : 0) |
788 (promisc ? IFF_PROMISC : 0);
790 if (enic->flags != flags) {
792 enic_dev_packet_filter(enic, directed,
793 multicast, broadcast, promisc, allmulti);
797 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
799 __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
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 int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
812 struct enic *enic = netdev_priv(netdev);
813 struct enic_port_profile *pp;
816 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
820 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
821 if (vf == PORT_SELF_VF) {
822 memcpy(pp->vf_mac, mac, ETH_ALEN);
826 * For sriov vf's set the mac in hw
828 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
829 vnic_dev_set_mac_addr, mac);
830 return enic_dev_status_to_errno(err);
836 static int enic_set_vf_port(struct net_device *netdev, int vf,
837 struct nlattr *port[])
839 struct enic *enic = netdev_priv(netdev);
840 struct enic_port_profile prev_pp;
841 struct enic_port_profile *pp;
842 int err = 0, restore_pp = 1;
844 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
848 if (!port[IFLA_PORT_REQUEST])
851 memcpy(&prev_pp, pp, sizeof(*enic->pp));
852 memset(pp, 0, sizeof(*enic->pp));
854 pp->set |= ENIC_SET_REQUEST;
855 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
857 if (port[IFLA_PORT_PROFILE]) {
858 pp->set |= ENIC_SET_NAME;
859 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
863 if (port[IFLA_PORT_INSTANCE_UUID]) {
864 pp->set |= ENIC_SET_INSTANCE;
865 memcpy(pp->instance_uuid,
866 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
869 if (port[IFLA_PORT_HOST_UUID]) {
870 pp->set |= ENIC_SET_HOST;
871 memcpy(pp->host_uuid,
872 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
875 if (vf == PORT_SELF_VF) {
876 /* Special case handling: mac came from IFLA_VF_MAC */
877 if (!is_zero_ether_addr(prev_pp.vf_mac))
878 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
880 if (is_zero_ether_addr(netdev->dev_addr))
881 eth_hw_addr_random(netdev);
883 /* SR-IOV VF: get mac from adapter */
884 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
885 vnic_dev_get_mac_addr, pp->mac_addr);
887 netdev_err(netdev, "Error getting mac for vf %d\n", vf);
888 memcpy(pp, &prev_pp, sizeof(*pp));
889 return enic_dev_status_to_errno(err);
893 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
896 /* Things are still the way they were: Implicit
897 * DISASSOCIATE failed
899 memcpy(pp, &prev_pp, sizeof(*pp));
901 memset(pp, 0, sizeof(*pp));
902 if (vf == PORT_SELF_VF)
903 eth_zero_addr(netdev->dev_addr);
906 /* Set flag to indicate that the port assoc/disassoc
907 * request has been sent out to fw
909 pp->set |= ENIC_PORT_REQUEST_APPLIED;
911 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
912 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
913 eth_zero_addr(pp->mac_addr);
914 if (vf == PORT_SELF_VF)
915 eth_zero_addr(netdev->dev_addr);
919 if (vf == PORT_SELF_VF)
920 eth_zero_addr(pp->vf_mac);
925 static int enic_get_vf_port(struct net_device *netdev, int vf,
928 struct enic *enic = netdev_priv(netdev);
929 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
930 struct enic_port_profile *pp;
933 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
937 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
940 err = enic_process_get_pp_request(enic, vf, pp->request, &response);
944 if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
945 nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
946 ((pp->set & ENIC_SET_NAME) &&
947 nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
948 ((pp->set & ENIC_SET_INSTANCE) &&
949 nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
950 pp->instance_uuid)) ||
951 ((pp->set & ENIC_SET_HOST) &&
952 nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
953 goto nla_put_failure;
960 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
962 struct enic *enic = vnic_dev_priv(rq->vdev);
967 pci_unmap_single(enic->pdev, buf->dma_addr,
968 buf->len, PCI_DMA_FROMDEVICE);
969 dev_kfree_skb_any(buf->os_buf);
973 static int enic_rq_alloc_buf(struct vnic_rq *rq)
975 struct enic *enic = vnic_dev_priv(rq->vdev);
976 struct net_device *netdev = enic->netdev;
978 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
979 unsigned int os_buf_index = 0;
981 struct vnic_rq_buf *buf = rq->to_use;
984 enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr,
989 skb = netdev_alloc_skb_ip_align(netdev, len);
993 dma_addr = pci_map_single(enic->pdev, skb->data, len,
995 if (unlikely(enic_dma_map_check(enic, dma_addr))) {
1000 enic_queue_rq_desc(rq, skb, os_buf_index,
1006 static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
1009 if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
1010 pkt_size->large_pkt_bytes_cnt += pkt_len;
1012 pkt_size->small_pkt_bytes_cnt += pkt_len;
1015 static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
1016 struct vnic_rq_buf *buf, u16 len)
1018 struct enic *enic = netdev_priv(netdev);
1019 struct sk_buff *new_skb;
1021 if (len > enic->rx_copybreak)
1023 new_skb = netdev_alloc_skb_ip_align(netdev, len);
1026 pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len,
1028 memcpy(new_skb->data, (*skb)->data, len);
1034 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1035 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1036 int skipped, void *opaque)
1038 struct enic *enic = vnic_dev_priv(rq->vdev);
1039 struct net_device *netdev = enic->netdev;
1040 struct sk_buff *skb;
1041 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1043 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1044 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1045 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1046 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1048 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1056 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1057 &type, &color, &q_number, &completed_index,
1058 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1059 &csum_not_calc, &rss_hash, &bytes_written,
1060 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1061 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1062 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1063 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1069 if (bytes_written > 0)
1071 else if (bytes_written == 0)
1072 enic->rq_truncated_pkts++;
1075 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1076 PCI_DMA_FROMDEVICE);
1077 dev_kfree_skb_any(skb);
1083 if (eop && bytes_written > 0) {
1088 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
1090 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1091 PCI_DMA_FROMDEVICE);
1093 prefetch(skb->data - NET_IP_ALIGN);
1095 skb_put(skb, bytes_written);
1096 skb->protocol = eth_type_trans(skb, netdev);
1097 skb_record_rx_queue(skb, q_number);
1098 if (netdev->features & NETIF_F_RXHASH) {
1099 skb_set_hash(skb, rss_hash,
1101 (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
1102 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
1103 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
1104 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1107 /* Hardware does not provide whole packet checksum. It only
1108 * provides pseudo checksum. Since hw validates the packet
1109 * checksum but not provide us the checksum value. use
1110 * CHECSUM_UNNECESSARY.
1112 if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok &&
1114 skb->ip_summed = CHECKSUM_UNNECESSARY;
1117 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1119 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1120 if (enic_poll_busy_polling(rq) ||
1121 !(netdev->features & NETIF_F_GRO))
1122 netif_receive_skb(skb);
1124 napi_gro_receive(&enic->napi[q_number], skb);
1125 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1126 enic_intr_update_pkt_size(&cq->pkt_size_counter,
1133 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1134 PCI_DMA_FROMDEVICE);
1135 dev_kfree_skb_any(skb);
1140 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1141 u8 type, u16 q_number, u16 completed_index, void *opaque)
1143 struct enic *enic = vnic_dev_priv(vdev);
1145 vnic_rq_service(&enic->rq[q_number], cq_desc,
1146 completed_index, VNIC_RQ_RETURN_DESC,
1147 enic_rq_indicate_buf, opaque);
1152 static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1154 unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1155 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1156 u32 timer = cq->tobe_rx_coal_timeval;
1158 if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1159 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1160 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1164 static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1166 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1167 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1168 struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1174 ktime_t now = ktime_get();
1176 delta = ktime_us_delta(now, cq->prev_ts);
1177 if (delta < ENIC_AIC_TS_BREAK)
1181 traffic = pkt_size_counter->large_pkt_bytes_cnt +
1182 pkt_size_counter->small_pkt_bytes_cnt;
1183 /* The table takes Mbps
1184 * traffic *= 8 => bits
1185 * traffic *= (10^6 / delta) => bps
1186 * traffic /= 10^6 => Mbps
1188 * Combining, traffic *= (8 / delta)
1192 traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
1194 for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1195 if (traffic < mod_table[index].rx_rate)
1197 range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1198 pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1199 rx_coal->small_pkt_range_start :
1200 rx_coal->large_pkt_range_start;
1201 timer = range_start + ((rx_coal->range_end - range_start) *
1202 mod_table[index].range_percent / 100);
1204 cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1206 pkt_size_counter->large_pkt_bytes_cnt = 0;
1207 pkt_size_counter->small_pkt_bytes_cnt = 0;
1210 static int enic_poll(struct napi_struct *napi, int budget)
1212 struct net_device *netdev = napi->dev;
1213 struct enic *enic = netdev_priv(netdev);
1214 unsigned int cq_rq = enic_cq_rq(enic, 0);
1215 unsigned int cq_wq = enic_cq_wq(enic, 0);
1216 unsigned int intr = enic_legacy_io_intr();
1217 unsigned int rq_work_to_do = budget;
1218 unsigned int wq_work_to_do = -1; /* no limit */
1219 unsigned int work_done, rq_work_done = 0, wq_work_done;
1222 wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1223 enic_wq_service, NULL);
1225 if (!enic_poll_lock_napi(&enic->rq[cq_rq])) {
1226 if (wq_work_done > 0)
1227 vnic_intr_return_credits(&enic->intr[intr],
1229 0 /* dont unmask intr */,
1230 0 /* dont reset intr timer */);
1235 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1236 rq_work_to_do, enic_rq_service, NULL);
1238 /* Accumulate intr event credits for this polling
1239 * cycle. An intr event is the completion of a
1240 * a WQ or RQ packet.
1243 work_done = rq_work_done + wq_work_done;
1246 vnic_intr_return_credits(&enic->intr[intr],
1248 0 /* don't unmask intr */,
1249 0 /* don't reset intr timer */);
1251 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1252 enic_poll_unlock_napi(&enic->rq[cq_rq], napi);
1254 /* Buffer allocation failed. Stay in polling
1255 * mode so we can try to fill the ring again.
1259 rq_work_done = rq_work_to_do;
1260 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1261 /* Call the function which refreshes the intr coalescing timer
1262 * value based on the traffic.
1264 enic_calc_int_moderation(enic, &enic->rq[0]);
1266 if (rq_work_done < rq_work_to_do) {
1268 /* Some work done, but not enough to stay in polling,
1272 napi_complete(napi);
1273 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1274 enic_set_int_moderation(enic, &enic->rq[0]);
1275 vnic_intr_unmask(&enic->intr[intr]);
1278 return rq_work_done;
1281 #ifdef CONFIG_RFS_ACCEL
1282 static void enic_free_rx_cpu_rmap(struct enic *enic)
1284 free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1285 enic->netdev->rx_cpu_rmap = NULL;
1288 static void enic_set_rx_cpu_rmap(struct enic *enic)
1292 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1293 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1294 if (unlikely(!enic->netdev->rx_cpu_rmap))
1296 for (i = 0; i < enic->rq_count; i++) {
1297 res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1298 enic->msix_entry[i].vector);
1299 if (unlikely(res)) {
1300 enic_free_rx_cpu_rmap(enic);
1309 static void enic_free_rx_cpu_rmap(struct enic *enic)
1313 static void enic_set_rx_cpu_rmap(struct enic *enic)
1317 #endif /* CONFIG_RFS_ACCEL */
1319 #ifdef CONFIG_NET_RX_BUSY_POLL
1320 static int enic_busy_poll(struct napi_struct *napi)
1322 struct net_device *netdev = napi->dev;
1323 struct enic *enic = netdev_priv(netdev);
1324 unsigned int rq = (napi - &enic->napi[0]);
1325 unsigned int cq = enic_cq_rq(enic, rq);
1326 unsigned int intr = enic_msix_rq_intr(enic, rq);
1327 unsigned int work_to_do = -1; /* clean all pkts possible */
1328 unsigned int work_done;
1330 if (!enic_poll_lock_poll(&enic->rq[rq]))
1331 return LL_FLUSH_BUSY;
1332 work_done = vnic_cq_service(&enic->cq[cq], work_to_do,
1333 enic_rq_service, NULL);
1336 vnic_intr_return_credits(&enic->intr[intr],
1338 vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1339 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1340 enic_calc_int_moderation(enic, &enic->rq[rq]);
1341 enic_poll_unlock_poll(&enic->rq[rq]);
1345 #endif /* CONFIG_NET_RX_BUSY_POLL */
1347 static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1349 struct net_device *netdev = napi->dev;
1350 struct enic *enic = netdev_priv(netdev);
1351 unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1352 struct vnic_wq *wq = &enic->wq[wq_index];
1355 unsigned int wq_work_to_do = -1; /* clean all desc possible */
1356 unsigned int wq_work_done;
1357 unsigned int wq_irq;
1360 cq = enic_cq_wq(enic, wq_irq);
1361 intr = enic_msix_wq_intr(enic, wq_irq);
1362 wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1363 enic_wq_service, NULL);
1365 vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1366 0 /* don't unmask intr */,
1367 1 /* reset intr timer */);
1368 if (!wq_work_done) {
1369 napi_complete(napi);
1370 vnic_intr_unmask(&enic->intr[intr]);
1377 static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
1379 struct net_device *netdev = napi->dev;
1380 struct enic *enic = netdev_priv(netdev);
1381 unsigned int rq = (napi - &enic->napi[0]);
1382 unsigned int cq = enic_cq_rq(enic, rq);
1383 unsigned int intr = enic_msix_rq_intr(enic, rq);
1384 unsigned int work_to_do = budget;
1385 unsigned int work_done = 0;
1388 if (!enic_poll_lock_napi(&enic->rq[rq]))
1394 work_done = vnic_cq_service(&enic->cq[cq],
1395 work_to_do, enic_rq_service, NULL);
1397 /* Return intr event credits for this polling
1398 * cycle. An intr event is the completion of a
1403 vnic_intr_return_credits(&enic->intr[intr],
1405 0 /* don't unmask intr */,
1406 0 /* don't reset intr timer */);
1408 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1410 /* Buffer allocation failed. Stay in polling mode
1411 * so we can try to fill the ring again.
1415 work_done = work_to_do;
1416 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1417 /* Call the function which refreshes the intr coalescing timer
1418 * value based on the traffic.
1420 enic_calc_int_moderation(enic, &enic->rq[rq]);
1422 enic_poll_unlock_napi(&enic->rq[rq], napi);
1423 if (work_done < work_to_do) {
1425 /* Some work done, but not enough to stay in polling,
1429 napi_complete(napi);
1430 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1431 enic_set_int_moderation(enic, &enic->rq[rq]);
1432 vnic_intr_unmask(&enic->intr[intr]);
1438 static void enic_notify_timer(unsigned long data)
1440 struct enic *enic = (struct enic *)data;
1442 enic_notify_check(enic);
1444 mod_timer(&enic->notify_timer,
1445 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1448 static void enic_free_intr(struct enic *enic)
1450 struct net_device *netdev = enic->netdev;
1453 enic_free_rx_cpu_rmap(enic);
1454 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1455 case VNIC_DEV_INTR_MODE_INTX:
1456 free_irq(enic->pdev->irq, netdev);
1458 case VNIC_DEV_INTR_MODE_MSI:
1459 free_irq(enic->pdev->irq, enic);
1461 case VNIC_DEV_INTR_MODE_MSIX:
1462 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1463 if (enic->msix[i].requested)
1464 free_irq(enic->msix_entry[i].vector,
1465 enic->msix[i].devid);
1472 static int enic_request_intr(struct enic *enic)
1474 struct net_device *netdev = enic->netdev;
1475 unsigned int i, intr;
1478 enic_set_rx_cpu_rmap(enic);
1479 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1481 case VNIC_DEV_INTR_MODE_INTX:
1483 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1484 IRQF_SHARED, netdev->name, netdev);
1487 case VNIC_DEV_INTR_MODE_MSI:
1489 err = request_irq(enic->pdev->irq, enic_isr_msi,
1490 0, netdev->name, enic);
1493 case VNIC_DEV_INTR_MODE_MSIX:
1495 for (i = 0; i < enic->rq_count; i++) {
1496 intr = enic_msix_rq_intr(enic, i);
1497 snprintf(enic->msix[intr].devname,
1498 sizeof(enic->msix[intr].devname),
1499 "%.11s-rx-%d", netdev->name, i);
1500 enic->msix[intr].isr = enic_isr_msix;
1501 enic->msix[intr].devid = &enic->napi[i];
1504 for (i = 0; i < enic->wq_count; i++) {
1505 int wq = enic_cq_wq(enic, i);
1507 intr = enic_msix_wq_intr(enic, i);
1508 snprintf(enic->msix[intr].devname,
1509 sizeof(enic->msix[intr].devname),
1510 "%.11s-tx-%d", netdev->name, i);
1511 enic->msix[intr].isr = enic_isr_msix;
1512 enic->msix[intr].devid = &enic->napi[wq];
1515 intr = enic_msix_err_intr(enic);
1516 snprintf(enic->msix[intr].devname,
1517 sizeof(enic->msix[intr].devname),
1518 "%.11s-err", netdev->name);
1519 enic->msix[intr].isr = enic_isr_msix_err;
1520 enic->msix[intr].devid = enic;
1522 intr = enic_msix_notify_intr(enic);
1523 snprintf(enic->msix[intr].devname,
1524 sizeof(enic->msix[intr].devname),
1525 "%.11s-notify", netdev->name);
1526 enic->msix[intr].isr = enic_isr_msix_notify;
1527 enic->msix[intr].devid = enic;
1529 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1530 enic->msix[i].requested = 0;
1532 for (i = 0; i < enic->intr_count; i++) {
1533 err = request_irq(enic->msix_entry[i].vector,
1534 enic->msix[i].isr, 0,
1535 enic->msix[i].devname,
1536 enic->msix[i].devid);
1538 enic_free_intr(enic);
1541 enic->msix[i].requested = 1;
1553 static void enic_synchronize_irqs(struct enic *enic)
1557 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1558 case VNIC_DEV_INTR_MODE_INTX:
1559 case VNIC_DEV_INTR_MODE_MSI:
1560 synchronize_irq(enic->pdev->irq);
1562 case VNIC_DEV_INTR_MODE_MSIX:
1563 for (i = 0; i < enic->intr_count; i++)
1564 synchronize_irq(enic->msix_entry[i].vector);
1571 static void enic_set_rx_coal_setting(struct enic *enic)
1575 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1577 /* 1. Read the link speed from fw
1578 * 2. Pick the default range for the speed
1579 * 3. Update it in enic->rx_coalesce_setting
1581 speed = vnic_dev_port_speed(enic->vdev);
1582 if (ENIC_LINK_SPEED_10G < speed)
1583 index = ENIC_LINK_40G_INDEX;
1584 else if (ENIC_LINK_SPEED_4G < speed)
1585 index = ENIC_LINK_10G_INDEX;
1587 index = ENIC_LINK_4G_INDEX;
1589 rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1590 rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1591 rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1593 /* Start with the value provided by UCSM */
1594 for (index = 0; index < enic->rq_count; index++)
1595 enic->cq[index].cur_rx_coal_timeval =
1596 enic->config.intr_timer_usec;
1598 rx_coal->use_adaptive_rx_coalesce = 1;
1601 static int enic_dev_notify_set(struct enic *enic)
1605 spin_lock_bh(&enic->devcmd_lock);
1606 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1607 case VNIC_DEV_INTR_MODE_INTX:
1608 err = vnic_dev_notify_set(enic->vdev,
1609 enic_legacy_notify_intr());
1611 case VNIC_DEV_INTR_MODE_MSIX:
1612 err = vnic_dev_notify_set(enic->vdev,
1613 enic_msix_notify_intr(enic));
1616 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1619 spin_unlock_bh(&enic->devcmd_lock);
1624 static void enic_notify_timer_start(struct enic *enic)
1626 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1627 case VNIC_DEV_INTR_MODE_MSI:
1628 mod_timer(&enic->notify_timer, jiffies);
1631 /* Using intr for notification for INTx/MSI-X */
1636 /* rtnl lock is held, process context */
1637 static int enic_open(struct net_device *netdev)
1639 struct enic *enic = netdev_priv(netdev);
1643 err = enic_request_intr(enic);
1645 netdev_err(netdev, "Unable to request irq.\n");
1649 err = enic_dev_notify_set(enic);
1652 "Failed to alloc notify buffer, aborting.\n");
1653 goto err_out_free_intr;
1656 for (i = 0; i < enic->rq_count; i++) {
1657 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1658 /* Need at least one buffer on ring to get going */
1659 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1660 netdev_err(netdev, "Unable to alloc receive buffers\n");
1662 goto err_out_free_rq;
1666 for (i = 0; i < enic->wq_count; i++)
1667 vnic_wq_enable(&enic->wq[i]);
1668 for (i = 0; i < enic->rq_count; i++)
1669 vnic_rq_enable(&enic->rq[i]);
1671 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1672 enic_dev_add_station_addr(enic);
1674 enic_set_rx_mode(netdev);
1676 netif_tx_wake_all_queues(netdev);
1678 for (i = 0; i < enic->rq_count; i++) {
1679 enic_busy_poll_init_lock(&enic->rq[i]);
1680 napi_enable(&enic->napi[i]);
1682 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1683 for (i = 0; i < enic->wq_count; i++)
1684 napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
1685 enic_dev_enable(enic);
1687 for (i = 0; i < enic->intr_count; i++)
1688 vnic_intr_unmask(&enic->intr[i]);
1690 enic_notify_timer_start(enic);
1691 enic_rfs_flw_tbl_init(enic);
1696 for (i = 0; i < enic->rq_count; i++)
1697 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1698 enic_dev_notify_unset(enic);
1700 enic_free_intr(enic);
1705 /* rtnl lock is held, process context */
1706 static int enic_stop(struct net_device *netdev)
1708 struct enic *enic = netdev_priv(netdev);
1712 for (i = 0; i < enic->intr_count; i++) {
1713 vnic_intr_mask(&enic->intr[i]);
1714 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1717 enic_synchronize_irqs(enic);
1719 del_timer_sync(&enic->notify_timer);
1720 enic_rfs_flw_tbl_free(enic);
1722 enic_dev_disable(enic);
1724 for (i = 0; i < enic->rq_count; i++) {
1725 napi_disable(&enic->napi[i]);
1727 while (!enic_poll_lock_napi(&enic->rq[i]))
1732 netif_carrier_off(netdev);
1733 netif_tx_disable(netdev);
1734 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1735 for (i = 0; i < enic->wq_count; i++)
1736 napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
1738 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1739 enic_dev_del_station_addr(enic);
1741 for (i = 0; i < enic->wq_count; i++) {
1742 err = vnic_wq_disable(&enic->wq[i]);
1746 for (i = 0; i < enic->rq_count; i++) {
1747 err = vnic_rq_disable(&enic->rq[i]);
1752 enic_dev_notify_unset(enic);
1753 enic_free_intr(enic);
1755 for (i = 0; i < enic->wq_count; i++)
1756 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1757 for (i = 0; i < enic->rq_count; i++)
1758 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1759 for (i = 0; i < enic->cq_count; i++)
1760 vnic_cq_clean(&enic->cq[i]);
1761 for (i = 0; i < enic->intr_count; i++)
1762 vnic_intr_clean(&enic->intr[i]);
1767 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1769 struct enic *enic = netdev_priv(netdev);
1770 int running = netif_running(netdev);
1772 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1775 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1781 netdev->mtu = new_mtu;
1783 if (netdev->mtu > enic->port_mtu)
1785 "interface MTU (%d) set higher than port MTU (%d)\n",
1786 netdev->mtu, enic->port_mtu);
1794 static void enic_change_mtu_work(struct work_struct *work)
1796 struct enic *enic = container_of(work, struct enic, change_mtu_work);
1797 struct net_device *netdev = enic->netdev;
1798 int new_mtu = vnic_dev_mtu(enic->vdev);
1802 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1807 del_timer_sync(&enic->notify_timer);
1809 for (i = 0; i < enic->rq_count; i++)
1810 napi_disable(&enic->napi[i]);
1812 vnic_intr_mask(&enic->intr[0]);
1813 enic_synchronize_irqs(enic);
1814 err = vnic_rq_disable(&enic->rq[0]);
1817 netdev_err(netdev, "Unable to disable RQ.\n");
1820 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1821 vnic_cq_clean(&enic->cq[0]);
1822 vnic_intr_clean(&enic->intr[0]);
1824 /* Fill RQ with new_mtu-sized buffers */
1825 netdev->mtu = new_mtu;
1826 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1827 /* Need at least one buffer on ring to get going */
1828 if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1830 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1835 vnic_rq_enable(&enic->rq[0]);
1836 napi_enable(&enic->napi[0]);
1837 vnic_intr_unmask(&enic->intr[0]);
1838 enic_notify_timer_start(enic);
1842 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1845 #ifdef CONFIG_NET_POLL_CONTROLLER
1846 static void enic_poll_controller(struct net_device *netdev)
1848 struct enic *enic = netdev_priv(netdev);
1849 struct vnic_dev *vdev = enic->vdev;
1850 unsigned int i, intr;
1852 switch (vnic_dev_get_intr_mode(vdev)) {
1853 case VNIC_DEV_INTR_MODE_MSIX:
1854 for (i = 0; i < enic->rq_count; i++) {
1855 intr = enic_msix_rq_intr(enic, i);
1856 enic_isr_msix(enic->msix_entry[intr].vector,
1860 for (i = 0; i < enic->wq_count; i++) {
1861 intr = enic_msix_wq_intr(enic, i);
1862 enic_isr_msix(enic->msix_entry[intr].vector,
1863 &enic->napi[enic_cq_wq(enic, i)]);
1867 case VNIC_DEV_INTR_MODE_MSI:
1868 enic_isr_msi(enic->pdev->irq, enic);
1870 case VNIC_DEV_INTR_MODE_INTX:
1871 enic_isr_legacy(enic->pdev->irq, netdev);
1879 static int enic_dev_wait(struct vnic_dev *vdev,
1880 int (*start)(struct vnic_dev *, int),
1881 int (*finished)(struct vnic_dev *, int *),
1888 BUG_ON(in_interrupt());
1890 err = start(vdev, arg);
1894 /* Wait for func to complete...2 seconds max
1897 time = jiffies + (HZ * 2);
1900 err = finished(vdev, &done);
1907 schedule_timeout_uninterruptible(HZ / 10);
1909 } while (time_after(time, jiffies));
1914 static int enic_dev_open(struct enic *enic)
1918 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1919 vnic_dev_open_done, 0);
1921 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1927 static int enic_dev_hang_reset(struct enic *enic)
1931 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1932 vnic_dev_hang_reset_done, 0);
1934 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1940 int __enic_set_rsskey(struct enic *enic)
1942 union vnic_rss_key *rss_key_buf_va;
1943 dma_addr_t rss_key_buf_pa;
1944 int i, kidx, bidx, err;
1946 rss_key_buf_va = pci_zalloc_consistent(enic->pdev,
1947 sizeof(union vnic_rss_key),
1949 if (!rss_key_buf_va)
1952 for (i = 0; i < ENIC_RSS_LEN; i++) {
1953 kidx = i / ENIC_RSS_BYTES_PER_KEY;
1954 bidx = i % ENIC_RSS_BYTES_PER_KEY;
1955 rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i];
1957 spin_lock_bh(&enic->devcmd_lock);
1958 err = enic_set_rss_key(enic,
1960 sizeof(union vnic_rss_key));
1961 spin_unlock_bh(&enic->devcmd_lock);
1963 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1964 rss_key_buf_va, rss_key_buf_pa);
1969 static int enic_set_rsskey(struct enic *enic)
1971 netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN);
1973 return __enic_set_rsskey(enic);
1976 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1978 dma_addr_t rss_cpu_buf_pa;
1979 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1983 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1984 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1985 if (!rss_cpu_buf_va)
1988 for (i = 0; i < (1 << rss_hash_bits); i++)
1989 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1991 spin_lock_bh(&enic->devcmd_lock);
1992 err = enic_set_rss_cpu(enic,
1994 sizeof(union vnic_rss_cpu));
1995 spin_unlock_bh(&enic->devcmd_lock);
1997 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1998 rss_cpu_buf_va, rss_cpu_buf_pa);
2003 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2004 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
2006 const u8 tso_ipid_split_en = 0;
2007 const u8 ig_vlan_strip_en = 1;
2010 /* Enable VLAN tag stripping.
2013 spin_lock_bh(&enic->devcmd_lock);
2014 err = enic_set_nic_cfg(enic,
2015 rss_default_cpu, rss_hash_type,
2016 rss_hash_bits, rss_base_cpu,
2017 rss_enable, tso_ipid_split_en,
2019 spin_unlock_bh(&enic->devcmd_lock);
2024 static int enic_set_rss_nic_cfg(struct enic *enic)
2026 struct device *dev = enic_get_dev(enic);
2027 const u8 rss_default_cpu = 0;
2028 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
2029 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
2030 NIC_CFG_RSS_HASH_TYPE_IPV6 |
2031 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2032 const u8 rss_hash_bits = 7;
2033 const u8 rss_base_cpu = 0;
2034 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2037 if (!enic_set_rsskey(enic)) {
2038 if (enic_set_rsscpu(enic, rss_hash_bits)) {
2040 dev_warn(dev, "RSS disabled, "
2041 "Failed to set RSS cpu indirection table.");
2045 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2049 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2050 rss_hash_bits, rss_base_cpu, rss_enable);
2053 static void enic_reset(struct work_struct *work)
2055 struct enic *enic = container_of(work, struct enic, reset);
2057 if (!netif_running(enic->netdev))
2062 spin_lock(&enic->enic_api_lock);
2063 enic_dev_hang_notify(enic);
2064 enic_stop(enic->netdev);
2065 enic_dev_hang_reset(enic);
2066 enic_reset_addr_lists(enic);
2067 enic_init_vnic_resources(enic);
2068 enic_set_rss_nic_cfg(enic);
2069 enic_dev_set_ig_vlan_rewrite_mode(enic);
2070 enic_open(enic->netdev);
2071 spin_unlock(&enic->enic_api_lock);
2072 call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2077 static int enic_set_intr_mode(struct enic *enic)
2079 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2080 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2083 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2084 * on system capabilities.
2088 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2089 * (the second to last INTR is used for WQ/RQ errors)
2090 * (the last INTR is used for notifications)
2093 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2094 for (i = 0; i < n + m + 2; i++)
2095 enic->msix_entry[i].entry = i;
2097 /* Use multiple RQs if RSS is enabled
2100 if (ENIC_SETTING(enic, RSS) &&
2101 enic->config.intr_mode < 1 &&
2102 enic->rq_count >= n &&
2103 enic->wq_count >= m &&
2104 enic->cq_count >= n + m &&
2105 enic->intr_count >= n + m + 2) {
2107 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2108 n + m + 2, n + m + 2) > 0) {
2112 enic->cq_count = n + m;
2113 enic->intr_count = n + m + 2;
2115 vnic_dev_set_intr_mode(enic->vdev,
2116 VNIC_DEV_INTR_MODE_MSIX);
2122 if (enic->config.intr_mode < 1 &&
2123 enic->rq_count >= 1 &&
2124 enic->wq_count >= m &&
2125 enic->cq_count >= 1 + m &&
2126 enic->intr_count >= 1 + m + 2) {
2127 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2128 1 + m + 2, 1 + m + 2) > 0) {
2132 enic->cq_count = 1 + m;
2133 enic->intr_count = 1 + m + 2;
2135 vnic_dev_set_intr_mode(enic->vdev,
2136 VNIC_DEV_INTR_MODE_MSIX);
2144 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2147 if (enic->config.intr_mode < 2 &&
2148 enic->rq_count >= 1 &&
2149 enic->wq_count >= 1 &&
2150 enic->cq_count >= 2 &&
2151 enic->intr_count >= 1 &&
2152 !pci_enable_msi(enic->pdev)) {
2157 enic->intr_count = 1;
2159 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2166 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2167 * (the first INTR is used for WQ/RQ)
2168 * (the second INTR is used for WQ/RQ errors)
2169 * (the last INTR is used for notifications)
2172 if (enic->config.intr_mode < 3 &&
2173 enic->rq_count >= 1 &&
2174 enic->wq_count >= 1 &&
2175 enic->cq_count >= 2 &&
2176 enic->intr_count >= 3) {
2181 enic->intr_count = 3;
2183 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2188 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2193 static void enic_clear_intr_mode(struct enic *enic)
2195 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2196 case VNIC_DEV_INTR_MODE_MSIX:
2197 pci_disable_msix(enic->pdev);
2199 case VNIC_DEV_INTR_MODE_MSI:
2200 pci_disable_msi(enic->pdev);
2206 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2209 static const struct net_device_ops enic_netdev_dynamic_ops = {
2210 .ndo_open = enic_open,
2211 .ndo_stop = enic_stop,
2212 .ndo_start_xmit = enic_hard_start_xmit,
2213 .ndo_get_stats64 = enic_get_stats,
2214 .ndo_validate_addr = eth_validate_addr,
2215 .ndo_set_rx_mode = enic_set_rx_mode,
2216 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2217 .ndo_change_mtu = enic_change_mtu,
2218 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2219 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2220 .ndo_tx_timeout = enic_tx_timeout,
2221 .ndo_set_vf_port = enic_set_vf_port,
2222 .ndo_get_vf_port = enic_get_vf_port,
2223 .ndo_set_vf_mac = enic_set_vf_mac,
2224 #ifdef CONFIG_NET_POLL_CONTROLLER
2225 .ndo_poll_controller = enic_poll_controller,
2227 #ifdef CONFIG_RFS_ACCEL
2228 .ndo_rx_flow_steer = enic_rx_flow_steer,
2230 #ifdef CONFIG_NET_RX_BUSY_POLL
2231 .ndo_busy_poll = enic_busy_poll,
2235 static const struct net_device_ops enic_netdev_ops = {
2236 .ndo_open = enic_open,
2237 .ndo_stop = enic_stop,
2238 .ndo_start_xmit = enic_hard_start_xmit,
2239 .ndo_get_stats64 = enic_get_stats,
2240 .ndo_validate_addr = eth_validate_addr,
2241 .ndo_set_mac_address = enic_set_mac_address,
2242 .ndo_set_rx_mode = enic_set_rx_mode,
2243 .ndo_change_mtu = enic_change_mtu,
2244 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2245 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2246 .ndo_tx_timeout = enic_tx_timeout,
2247 .ndo_set_vf_port = enic_set_vf_port,
2248 .ndo_get_vf_port = enic_get_vf_port,
2249 .ndo_set_vf_mac = enic_set_vf_mac,
2250 #ifdef CONFIG_NET_POLL_CONTROLLER
2251 .ndo_poll_controller = enic_poll_controller,
2253 #ifdef CONFIG_RFS_ACCEL
2254 .ndo_rx_flow_steer = enic_rx_flow_steer,
2256 #ifdef CONFIG_NET_RX_BUSY_POLL
2257 .ndo_busy_poll = enic_busy_poll,
2261 static void enic_dev_deinit(struct enic *enic)
2265 for (i = 0; i < enic->rq_count; i++) {
2266 napi_hash_del(&enic->napi[i]);
2267 netif_napi_del(&enic->napi[i]);
2269 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2270 for (i = 0; i < enic->wq_count; i++)
2271 netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
2273 enic_free_vnic_resources(enic);
2274 enic_clear_intr_mode(enic);
2277 static void enic_kdump_kernel_config(struct enic *enic)
2279 if (is_kdump_kernel()) {
2280 dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n");
2283 enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS;
2284 enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS;
2285 enic->config.mtu = min_t(u16, 1500, enic->config.mtu);
2289 static int enic_dev_init(struct enic *enic)
2291 struct device *dev = enic_get_dev(enic);
2292 struct net_device *netdev = enic->netdev;
2296 /* Get interrupt coalesce timer info */
2297 err = enic_dev_intr_coal_timer_info(enic);
2299 dev_warn(dev, "Using default conversion factor for "
2300 "interrupt coalesce timer\n");
2301 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2304 /* Get vNIC configuration
2307 err = enic_get_vnic_config(enic);
2309 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2313 /* Get available resource counts
2316 enic_get_res_counts(enic);
2318 /* modify resource count if we are in kdump_kernel
2320 enic_kdump_kernel_config(enic);
2322 /* Set interrupt mode based on resource counts and system
2326 err = enic_set_intr_mode(enic);
2328 dev_err(dev, "Failed to set intr mode based on resource "
2329 "counts and system capabilities, aborting\n");
2333 /* Allocate and configure vNIC resources
2336 err = enic_alloc_vnic_resources(enic);
2338 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2339 goto err_out_free_vnic_resources;
2342 enic_init_vnic_resources(enic);
2344 err = enic_set_rss_nic_cfg(enic);
2346 dev_err(dev, "Failed to config nic, aborting\n");
2347 goto err_out_free_vnic_resources;
2350 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2352 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2353 napi_hash_add(&enic->napi[0]);
2355 case VNIC_DEV_INTR_MODE_MSIX:
2356 for (i = 0; i < enic->rq_count; i++) {
2357 netif_napi_add(netdev, &enic->napi[i],
2358 enic_poll_msix_rq, NAPI_POLL_WEIGHT);
2359 napi_hash_add(&enic->napi[i]);
2361 for (i = 0; i < enic->wq_count; i++)
2362 netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)],
2363 enic_poll_msix_wq, NAPI_POLL_WEIGHT);
2369 err_out_free_vnic_resources:
2370 enic_clear_intr_mode(enic);
2371 enic_free_vnic_resources(enic);
2376 static void enic_iounmap(struct enic *enic)
2380 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2381 if (enic->bar[i].vaddr)
2382 iounmap(enic->bar[i].vaddr);
2385 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2387 struct device *dev = &pdev->dev;
2388 struct net_device *netdev;
2393 #ifdef CONFIG_PCI_IOV
2398 /* Allocate net device structure and initialize. Private
2399 * instance data is initialized to zero.
2402 netdev = alloc_etherdev_mqs(sizeof(struct enic),
2403 ENIC_RQ_MAX, ENIC_WQ_MAX);
2407 pci_set_drvdata(pdev, netdev);
2409 SET_NETDEV_DEV(netdev, &pdev->dev);
2411 enic = netdev_priv(netdev);
2412 enic->netdev = netdev;
2415 /* Setup PCI resources
2418 err = pci_enable_device_mem(pdev);
2420 dev_err(dev, "Cannot enable PCI device, aborting\n");
2421 goto err_out_free_netdev;
2424 err = pci_request_regions(pdev, DRV_NAME);
2426 dev_err(dev, "Cannot request PCI regions, aborting\n");
2427 goto err_out_disable_device;
2430 pci_set_master(pdev);
2432 /* Query PCI controller on system for DMA addressing
2433 * limitation for the device. Try 64-bit first, and
2437 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2439 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2441 dev_err(dev, "No usable DMA configuration, aborting\n");
2442 goto err_out_release_regions;
2444 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2446 dev_err(dev, "Unable to obtain %u-bit DMA "
2447 "for consistent allocations, aborting\n", 32);
2448 goto err_out_release_regions;
2451 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2453 dev_err(dev, "Unable to obtain %u-bit DMA "
2454 "for consistent allocations, aborting\n", 64);
2455 goto err_out_release_regions;
2460 /* Map vNIC resources from BAR0-5
2463 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2464 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2466 enic->bar[i].len = pci_resource_len(pdev, i);
2467 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2468 if (!enic->bar[i].vaddr) {
2469 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2471 goto err_out_iounmap;
2473 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2476 /* Register vNIC device
2479 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2480 ARRAY_SIZE(enic->bar));
2482 dev_err(dev, "vNIC registration failed, aborting\n");
2484 goto err_out_iounmap;
2487 err = vnic_devcmd_init(enic->vdev);
2490 goto err_out_vnic_unregister;
2492 #ifdef CONFIG_PCI_IOV
2493 /* Get number of subvnics */
2494 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2496 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2498 if (enic->num_vfs) {
2499 err = pci_enable_sriov(pdev, enic->num_vfs);
2501 dev_err(dev, "SRIOV enable failed, aborting."
2502 " pci_enable_sriov() returned %d\n",
2504 goto err_out_vnic_unregister;
2506 enic->priv_flags |= ENIC_SRIOV_ENABLED;
2507 num_pps = enic->num_vfs;
2512 /* Allocate structure for port profiles */
2513 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2516 goto err_out_disable_sriov_pp;
2519 /* Issue device open to get device in known state
2522 err = enic_dev_open(enic);
2524 dev_err(dev, "vNIC dev open failed, aborting\n");
2525 goto err_out_disable_sriov;
2528 /* Setup devcmd lock
2531 spin_lock_init(&enic->devcmd_lock);
2532 spin_lock_init(&enic->enic_api_lock);
2535 * Set ingress vlan rewrite mode before vnic initialization
2538 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2541 "Failed to set ingress vlan rewrite mode, aborting.\n");
2542 goto err_out_dev_close;
2545 /* Issue device init to initialize the vnic-to-switch link.
2546 * We'll start with carrier off and wait for link UP
2547 * notification later to turn on carrier. We don't need
2548 * to wait here for the vnic-to-switch link initialization
2549 * to complete; link UP notification is the indication that
2550 * the process is complete.
2553 netif_carrier_off(netdev);
2555 /* Do not call dev_init for a dynamic vnic.
2556 * For a dynamic vnic, init_prov_info will be
2557 * called later by an upper layer.
2560 if (!enic_is_dynamic(enic)) {
2561 err = vnic_dev_init(enic->vdev, 0);
2563 dev_err(dev, "vNIC dev init failed, aborting\n");
2564 goto err_out_dev_close;
2568 err = enic_dev_init(enic);
2570 dev_err(dev, "Device initialization failed, aborting\n");
2571 goto err_out_dev_close;
2574 netif_set_real_num_tx_queues(netdev, enic->wq_count);
2575 netif_set_real_num_rx_queues(netdev, enic->rq_count);
2577 /* Setup notification timer, HW reset task, and wq locks
2580 init_timer(&enic->notify_timer);
2581 enic->notify_timer.function = enic_notify_timer;
2582 enic->notify_timer.data = (unsigned long)enic;
2584 enic_set_rx_coal_setting(enic);
2585 INIT_WORK(&enic->reset, enic_reset);
2586 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2588 for (i = 0; i < enic->wq_count; i++)
2589 spin_lock_init(&enic->wq_lock[i]);
2591 /* Register net device
2594 enic->port_mtu = enic->config.mtu;
2595 (void)enic_change_mtu(netdev, enic->port_mtu);
2597 err = enic_set_mac_addr(netdev, enic->mac_addr);
2599 dev_err(dev, "Invalid MAC address, aborting\n");
2600 goto err_out_dev_deinit;
2603 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2604 /* rx coalesce time already got initialized. This gets used
2605 * if adaptive coal is turned off
2607 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2609 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2610 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2612 netdev->netdev_ops = &enic_netdev_ops;
2614 netdev->watchdog_timeo = 2 * HZ;
2615 enic_set_ethtool_ops(netdev);
2617 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2618 if (ENIC_SETTING(enic, LOOP)) {
2619 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2620 enic->loop_enable = 1;
2621 enic->loop_tag = enic->config.loop_tag;
2622 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2624 if (ENIC_SETTING(enic, TXCSUM))
2625 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2626 if (ENIC_SETTING(enic, TSO))
2627 netdev->hw_features |= NETIF_F_TSO |
2628 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2629 if (ENIC_SETTING(enic, RSS))
2630 netdev->hw_features |= NETIF_F_RXHASH;
2631 if (ENIC_SETTING(enic, RXCSUM))
2632 netdev->hw_features |= NETIF_F_RXCSUM;
2634 netdev->features |= netdev->hw_features;
2636 #ifdef CONFIG_RFS_ACCEL
2637 netdev->hw_features |= NETIF_F_NTUPLE;
2641 netdev->features |= NETIF_F_HIGHDMA;
2643 netdev->priv_flags |= IFF_UNICAST_FLT;
2645 err = register_netdev(netdev);
2647 dev_err(dev, "Cannot register net device, aborting\n");
2648 goto err_out_dev_deinit;
2650 enic->rx_copybreak = RX_COPYBREAK_DEFAULT;
2655 enic_dev_deinit(enic);
2657 vnic_dev_close(enic->vdev);
2658 err_out_disable_sriov:
2660 err_out_disable_sriov_pp:
2661 #ifdef CONFIG_PCI_IOV
2662 if (enic_sriov_enabled(enic)) {
2663 pci_disable_sriov(pdev);
2664 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2667 err_out_vnic_unregister:
2668 vnic_dev_unregister(enic->vdev);
2671 err_out_release_regions:
2672 pci_release_regions(pdev);
2673 err_out_disable_device:
2674 pci_disable_device(pdev);
2675 err_out_free_netdev:
2676 free_netdev(netdev);
2681 static void enic_remove(struct pci_dev *pdev)
2683 struct net_device *netdev = pci_get_drvdata(pdev);
2686 struct enic *enic = netdev_priv(netdev);
2688 cancel_work_sync(&enic->reset);
2689 cancel_work_sync(&enic->change_mtu_work);
2690 unregister_netdev(netdev);
2691 enic_dev_deinit(enic);
2692 vnic_dev_close(enic->vdev);
2693 #ifdef CONFIG_PCI_IOV
2694 if (enic_sriov_enabled(enic)) {
2695 pci_disable_sriov(pdev);
2696 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2700 vnic_dev_unregister(enic->vdev);
2702 pci_release_regions(pdev);
2703 pci_disable_device(pdev);
2704 free_netdev(netdev);
2708 static struct pci_driver enic_driver = {
2710 .id_table = enic_id_table,
2711 .probe = enic_probe,
2712 .remove = enic_remove,
2715 static int __init enic_init_module(void)
2717 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2719 return pci_register_driver(&enic_driver);
2722 static void __exit enic_cleanup_module(void)
2724 pci_unregister_driver(&enic_driver);
2727 module_init(enic_init_module);
2728 module_exit(enic_cleanup_module);