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>
34 #include <linux/ethtool.h>
37 #include <linux/ipv6.h>
38 #include <linux/tcp.h>
39 #include <linux/rtnetlink.h>
40 #include <linux/prefetch.h>
41 #include <net/ip6_checksum.h>
43 #include "cq_enet_desc.h"
45 #include "vnic_intr.h"
46 #include "vnic_stats.h"
53 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
54 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
55 #define MAX_TSO (1 << 16)
56 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
58 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
59 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
60 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */
62 /* Supported devices */
63 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
64 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
65 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
66 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
67 { 0, } /* end of table */
70 MODULE_DESCRIPTION(DRV_DESCRIPTION);
71 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
72 MODULE_LICENSE("GPL");
73 MODULE_VERSION(DRV_VERSION);
74 MODULE_DEVICE_TABLE(pci, enic_id_table);
77 char name[ETH_GSTRING_LEN];
81 #define ENIC_TX_STAT(stat) \
82 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
83 #define ENIC_RX_STAT(stat) \
84 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
86 static const struct enic_stat enic_tx_stats[] = {
87 ENIC_TX_STAT(tx_frames_ok),
88 ENIC_TX_STAT(tx_unicast_frames_ok),
89 ENIC_TX_STAT(tx_multicast_frames_ok),
90 ENIC_TX_STAT(tx_broadcast_frames_ok),
91 ENIC_TX_STAT(tx_bytes_ok),
92 ENIC_TX_STAT(tx_unicast_bytes_ok),
93 ENIC_TX_STAT(tx_multicast_bytes_ok),
94 ENIC_TX_STAT(tx_broadcast_bytes_ok),
95 ENIC_TX_STAT(tx_drops),
96 ENIC_TX_STAT(tx_errors),
100 static const struct enic_stat enic_rx_stats[] = {
101 ENIC_RX_STAT(rx_frames_ok),
102 ENIC_RX_STAT(rx_frames_total),
103 ENIC_RX_STAT(rx_unicast_frames_ok),
104 ENIC_RX_STAT(rx_multicast_frames_ok),
105 ENIC_RX_STAT(rx_broadcast_frames_ok),
106 ENIC_RX_STAT(rx_bytes_ok),
107 ENIC_RX_STAT(rx_unicast_bytes_ok),
108 ENIC_RX_STAT(rx_multicast_bytes_ok),
109 ENIC_RX_STAT(rx_broadcast_bytes_ok),
110 ENIC_RX_STAT(rx_drop),
111 ENIC_RX_STAT(rx_no_bufs),
112 ENIC_RX_STAT(rx_errors),
113 ENIC_RX_STAT(rx_rss),
114 ENIC_RX_STAT(rx_crc_errors),
115 ENIC_RX_STAT(rx_frames_64),
116 ENIC_RX_STAT(rx_frames_127),
117 ENIC_RX_STAT(rx_frames_255),
118 ENIC_RX_STAT(rx_frames_511),
119 ENIC_RX_STAT(rx_frames_1023),
120 ENIC_RX_STAT(rx_frames_1518),
121 ENIC_RX_STAT(rx_frames_to_max),
124 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
125 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
127 int enic_is_dynamic(struct enic *enic)
129 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
132 int enic_sriov_enabled(struct enic *enic)
134 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
137 static int enic_is_sriov_vf(struct enic *enic)
139 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
142 int enic_is_valid_vf(struct enic *enic, int vf)
144 #ifdef CONFIG_PCI_IOV
145 return vf >= 0 && vf < enic->num_vfs;
151 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
156 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
158 return enic->rq_count + wq;
161 static inline unsigned int enic_legacy_io_intr(void)
166 static inline unsigned int enic_legacy_err_intr(void)
171 static inline unsigned int enic_legacy_notify_intr(void)
176 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
178 return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
181 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
183 return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
186 static inline unsigned int enic_msix_err_intr(struct enic *enic)
188 return enic->rq_count + enic->wq_count;
191 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
193 return enic->rq_count + enic->wq_count + 1;
196 static int enic_get_settings(struct net_device *netdev,
197 struct ethtool_cmd *ecmd)
199 struct enic *enic = netdev_priv(netdev);
201 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
202 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
203 ecmd->port = PORT_FIBRE;
204 ecmd->transceiver = XCVR_EXTERNAL;
206 if (netif_carrier_ok(netdev)) {
207 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
208 ecmd->duplex = DUPLEX_FULL;
210 ethtool_cmd_speed_set(ecmd, -1);
214 ecmd->autoneg = AUTONEG_DISABLE;
219 static void enic_get_drvinfo(struct net_device *netdev,
220 struct ethtool_drvinfo *drvinfo)
222 struct enic *enic = netdev_priv(netdev);
223 struct vnic_devcmd_fw_info *fw_info;
225 enic_dev_fw_info(enic, &fw_info);
227 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
228 strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
229 strlcpy(drvinfo->fw_version, fw_info->fw_version,
230 sizeof(drvinfo->fw_version));
231 strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
232 sizeof(drvinfo->bus_info));
235 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
241 for (i = 0; i < enic_n_tx_stats; i++) {
242 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
243 data += ETH_GSTRING_LEN;
245 for (i = 0; i < enic_n_rx_stats; i++) {
246 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
247 data += ETH_GSTRING_LEN;
253 static int enic_get_sset_count(struct net_device *netdev, int sset)
257 return enic_n_tx_stats + enic_n_rx_stats;
263 static void enic_get_ethtool_stats(struct net_device *netdev,
264 struct ethtool_stats *stats, u64 *data)
266 struct enic *enic = netdev_priv(netdev);
267 struct vnic_stats *vstats;
270 enic_dev_stats_dump(enic, &vstats);
272 for (i = 0; i < enic_n_tx_stats; i++)
273 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
274 for (i = 0; i < enic_n_rx_stats; i++)
275 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
278 static u32 enic_get_msglevel(struct net_device *netdev)
280 struct enic *enic = netdev_priv(netdev);
281 return enic->msg_enable;
284 static void enic_set_msglevel(struct net_device *netdev, u32 value)
286 struct enic *enic = netdev_priv(netdev);
287 enic->msg_enable = value;
290 static int enic_get_coalesce(struct net_device *netdev,
291 struct ethtool_coalesce *ecmd)
293 struct enic *enic = netdev_priv(netdev);
295 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
296 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
301 static int enic_set_coalesce(struct net_device *netdev,
302 struct ethtool_coalesce *ecmd)
304 struct enic *enic = netdev_priv(netdev);
305 u32 tx_coalesce_usecs;
306 u32 rx_coalesce_usecs;
307 unsigned int i, intr;
309 tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
310 vnic_dev_get_intr_coal_timer_max(enic->vdev));
311 rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
312 vnic_dev_get_intr_coal_timer_max(enic->vdev));
314 switch (vnic_dev_get_intr_mode(enic->vdev)) {
315 case VNIC_DEV_INTR_MODE_INTX:
316 if (tx_coalesce_usecs != rx_coalesce_usecs)
319 intr = enic_legacy_io_intr();
320 vnic_intr_coalescing_timer_set(&enic->intr[intr],
323 case VNIC_DEV_INTR_MODE_MSI:
324 if (tx_coalesce_usecs != rx_coalesce_usecs)
327 vnic_intr_coalescing_timer_set(&enic->intr[0],
330 case VNIC_DEV_INTR_MODE_MSIX:
331 for (i = 0; i < enic->wq_count; i++) {
332 intr = enic_msix_wq_intr(enic, i);
333 vnic_intr_coalescing_timer_set(&enic->intr[intr],
337 for (i = 0; i < enic->rq_count; i++) {
338 intr = enic_msix_rq_intr(enic, i);
339 vnic_intr_coalescing_timer_set(&enic->intr[intr],
348 enic->tx_coalesce_usecs = tx_coalesce_usecs;
349 enic->rx_coalesce_usecs = rx_coalesce_usecs;
354 static const struct ethtool_ops enic_ethtool_ops = {
355 .get_settings = enic_get_settings,
356 .get_drvinfo = enic_get_drvinfo,
357 .get_msglevel = enic_get_msglevel,
358 .set_msglevel = enic_set_msglevel,
359 .get_link = ethtool_op_get_link,
360 .get_strings = enic_get_strings,
361 .get_sset_count = enic_get_sset_count,
362 .get_ethtool_stats = enic_get_ethtool_stats,
363 .get_coalesce = enic_get_coalesce,
364 .set_coalesce = enic_set_coalesce,
367 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
369 struct enic *enic = vnic_dev_priv(wq->vdev);
372 pci_unmap_single(enic->pdev, buf->dma_addr,
373 buf->len, PCI_DMA_TODEVICE);
375 pci_unmap_page(enic->pdev, buf->dma_addr,
376 buf->len, PCI_DMA_TODEVICE);
379 dev_kfree_skb_any(buf->os_buf);
382 static void enic_wq_free_buf(struct vnic_wq *wq,
383 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
385 enic_free_wq_buf(wq, buf);
388 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
389 u8 type, u16 q_number, u16 completed_index, void *opaque)
391 struct enic *enic = vnic_dev_priv(vdev);
393 spin_lock(&enic->wq_lock[q_number]);
395 vnic_wq_service(&enic->wq[q_number], cq_desc,
396 completed_index, enic_wq_free_buf,
399 if (netif_queue_stopped(enic->netdev) &&
400 vnic_wq_desc_avail(&enic->wq[q_number]) >=
401 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
402 netif_wake_queue(enic->netdev);
404 spin_unlock(&enic->wq_lock[q_number]);
409 static void enic_log_q_error(struct enic *enic)
414 for (i = 0; i < enic->wq_count; i++) {
415 error_status = vnic_wq_error_status(&enic->wq[i]);
417 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
421 for (i = 0; i < enic->rq_count; i++) {
422 error_status = vnic_rq_error_status(&enic->rq[i]);
424 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
429 static void enic_msglvl_check(struct enic *enic)
431 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
433 if (msg_enable != enic->msg_enable) {
434 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
435 enic->msg_enable, msg_enable);
436 enic->msg_enable = msg_enable;
440 static void enic_mtu_check(struct enic *enic)
442 u32 mtu = vnic_dev_mtu(enic->vdev);
443 struct net_device *netdev = enic->netdev;
445 if (mtu && mtu != enic->port_mtu) {
446 enic->port_mtu = mtu;
447 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
448 mtu = max_t(int, ENIC_MIN_MTU,
449 min_t(int, ENIC_MAX_MTU, mtu));
450 if (mtu != netdev->mtu)
451 schedule_work(&enic->change_mtu_work);
453 if (mtu < netdev->mtu)
455 "interface MTU (%d) set higher "
456 "than switch port MTU (%d)\n",
462 static void enic_link_check(struct enic *enic)
464 int link_status = vnic_dev_link_status(enic->vdev);
465 int carrier_ok = netif_carrier_ok(enic->netdev);
467 if (link_status && !carrier_ok) {
468 netdev_info(enic->netdev, "Link UP\n");
469 netif_carrier_on(enic->netdev);
470 } else if (!link_status && carrier_ok) {
471 netdev_info(enic->netdev, "Link DOWN\n");
472 netif_carrier_off(enic->netdev);
476 static void enic_notify_check(struct enic *enic)
478 enic_msglvl_check(enic);
479 enic_mtu_check(enic);
480 enic_link_check(enic);
483 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
485 static irqreturn_t enic_isr_legacy(int irq, void *data)
487 struct net_device *netdev = data;
488 struct enic *enic = netdev_priv(netdev);
489 unsigned int io_intr = enic_legacy_io_intr();
490 unsigned int err_intr = enic_legacy_err_intr();
491 unsigned int notify_intr = enic_legacy_notify_intr();
494 vnic_intr_mask(&enic->intr[io_intr]);
496 pba = vnic_intr_legacy_pba(enic->legacy_pba);
498 vnic_intr_unmask(&enic->intr[io_intr]);
499 return IRQ_NONE; /* not our interrupt */
502 if (ENIC_TEST_INTR(pba, notify_intr)) {
503 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
504 enic_notify_check(enic);
507 if (ENIC_TEST_INTR(pba, err_intr)) {
508 vnic_intr_return_all_credits(&enic->intr[err_intr]);
509 enic_log_q_error(enic);
510 /* schedule recovery from WQ/RQ error */
511 schedule_work(&enic->reset);
515 if (ENIC_TEST_INTR(pba, io_intr)) {
516 if (napi_schedule_prep(&enic->napi[0]))
517 __napi_schedule(&enic->napi[0]);
519 vnic_intr_unmask(&enic->intr[io_intr]);
525 static irqreturn_t enic_isr_msi(int irq, void *data)
527 struct enic *enic = data;
529 /* With MSI, there is no sharing of interrupts, so this is
530 * our interrupt and there is no need to ack it. The device
531 * is not providing per-vector masking, so the OS will not
532 * write to PCI config space to mask/unmask the interrupt.
533 * We're using mask_on_assertion for MSI, so the device
534 * automatically masks the interrupt when the interrupt is
535 * generated. Later, when exiting polling, the interrupt
536 * will be unmasked (see enic_poll).
538 * Also, the device uses the same PCIe Traffic Class (TC)
539 * for Memory Write data and MSI, so there are no ordering
540 * issues; the MSI will always arrive at the Root Complex
541 * _after_ corresponding Memory Writes (i.e. descriptor
545 napi_schedule(&enic->napi[0]);
550 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
552 struct napi_struct *napi = data;
554 /* schedule NAPI polling for RQ cleanup */
560 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
562 struct enic *enic = data;
563 unsigned int cq = enic_cq_wq(enic, 0);
564 unsigned int intr = enic_msix_wq_intr(enic, 0);
565 unsigned int wq_work_to_do = -1; /* no limit */
566 unsigned int wq_work_done;
568 wq_work_done = vnic_cq_service(&enic->cq[cq],
569 wq_work_to_do, enic_wq_service, NULL);
571 vnic_intr_return_credits(&enic->intr[intr],
574 1 /* reset intr timer */);
579 static irqreturn_t enic_isr_msix_err(int irq, void *data)
581 struct enic *enic = data;
582 unsigned int intr = enic_msix_err_intr(enic);
584 vnic_intr_return_all_credits(&enic->intr[intr]);
586 enic_log_q_error(enic);
588 /* schedule recovery from WQ/RQ error */
589 schedule_work(&enic->reset);
594 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
596 struct enic *enic = data;
597 unsigned int intr = enic_msix_notify_intr(enic);
599 vnic_intr_return_all_credits(&enic->intr[intr]);
600 enic_notify_check(enic);
605 static inline void enic_queue_wq_skb_cont(struct enic *enic,
606 struct vnic_wq *wq, struct sk_buff *skb,
607 unsigned int len_left, int loopback)
609 const skb_frag_t *frag;
611 /* Queue additional data fragments */
612 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
613 len_left -= skb_frag_size(frag);
614 enic_queue_wq_desc_cont(wq, skb,
615 skb_frag_dma_map(&enic->pdev->dev,
616 frag, 0, skb_frag_size(frag),
619 (len_left == 0), /* EOP? */
624 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
625 struct vnic_wq *wq, struct sk_buff *skb,
626 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
628 unsigned int head_len = skb_headlen(skb);
629 unsigned int len_left = skb->len - head_len;
630 int eop = (len_left == 0);
632 /* Queue the main skb fragment. The fragments are no larger
633 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
634 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
635 * per fragment is queued.
637 enic_queue_wq_desc(wq, skb,
638 pci_map_single(enic->pdev, skb->data,
639 head_len, PCI_DMA_TODEVICE),
641 vlan_tag_insert, vlan_tag,
645 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
648 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
649 struct vnic_wq *wq, struct sk_buff *skb,
650 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
652 unsigned int head_len = skb_headlen(skb);
653 unsigned int len_left = skb->len - head_len;
654 unsigned int hdr_len = skb_checksum_start_offset(skb);
655 unsigned int csum_offset = hdr_len + skb->csum_offset;
656 int eop = (len_left == 0);
658 /* Queue the main skb fragment. The fragments are no larger
659 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
660 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
661 * per fragment is queued.
663 enic_queue_wq_desc_csum_l4(wq, skb,
664 pci_map_single(enic->pdev, skb->data,
665 head_len, PCI_DMA_TODEVICE),
669 vlan_tag_insert, vlan_tag,
673 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
676 static inline void enic_queue_wq_skb_tso(struct enic *enic,
677 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
678 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
680 unsigned int frag_len_left = skb_headlen(skb);
681 unsigned int len_left = skb->len - frag_len_left;
682 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
683 int eop = (len_left == 0);
686 unsigned int offset = 0;
689 /* Preload TCP csum field with IP pseudo hdr calculated
690 * with IP length set to zero. HW will later add in length
691 * to each TCP segment resulting from the TSO.
694 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
695 ip_hdr(skb)->check = 0;
696 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
697 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
698 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
699 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
700 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
703 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
704 * for the main skb fragment
706 while (frag_len_left) {
707 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
708 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
709 len, PCI_DMA_TODEVICE);
710 enic_queue_wq_desc_tso(wq, skb,
714 vlan_tag_insert, vlan_tag,
715 eop && (len == frag_len_left), loopback);
716 frag_len_left -= len;
723 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
724 * for additional data fragments
726 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
727 len_left -= skb_frag_size(frag);
728 frag_len_left = skb_frag_size(frag);
731 while (frag_len_left) {
732 len = min(frag_len_left,
733 (unsigned int)WQ_ENET_MAX_DESC_LEN);
734 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
737 enic_queue_wq_desc_cont(wq, skb,
741 (len == frag_len_left), /* EOP? */
743 frag_len_left -= len;
749 static inline void enic_queue_wq_skb(struct enic *enic,
750 struct vnic_wq *wq, struct sk_buff *skb)
752 unsigned int mss = skb_shinfo(skb)->gso_size;
753 unsigned int vlan_tag = 0;
754 int vlan_tag_insert = 0;
757 if (vlan_tx_tag_present(skb)) {
758 /* VLAN tag from trunking driver */
760 vlan_tag = vlan_tx_tag_get(skb);
761 } else if (enic->loop_enable) {
762 vlan_tag = enic->loop_tag;
767 enic_queue_wq_skb_tso(enic, wq, skb, mss,
768 vlan_tag_insert, vlan_tag, loopback);
769 else if (skb->ip_summed == CHECKSUM_PARTIAL)
770 enic_queue_wq_skb_csum_l4(enic, wq, skb,
771 vlan_tag_insert, vlan_tag, loopback);
773 enic_queue_wq_skb_vlan(enic, wq, skb,
774 vlan_tag_insert, vlan_tag, loopback);
777 /* netif_tx_lock held, process context with BHs disabled, or BH */
778 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
779 struct net_device *netdev)
781 struct enic *enic = netdev_priv(netdev);
782 struct vnic_wq *wq = &enic->wq[0];
790 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
791 * which is very likely. In the off chance it's going to take
792 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
795 if (skb_shinfo(skb)->gso_size == 0 &&
796 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
797 skb_linearize(skb)) {
802 spin_lock_irqsave(&enic->wq_lock[0], flags);
804 if (vnic_wq_desc_avail(wq) <
805 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
806 netif_stop_queue(netdev);
807 /* This is a hard error, log it */
808 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
809 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
810 return NETDEV_TX_BUSY;
813 enic_queue_wq_skb(enic, wq, skb);
815 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
816 netif_stop_queue(netdev);
818 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
823 /* dev_base_lock rwlock held, nominally process context */
824 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
825 struct rtnl_link_stats64 *net_stats)
827 struct enic *enic = netdev_priv(netdev);
828 struct vnic_stats *stats;
830 enic_dev_stats_dump(enic, &stats);
832 net_stats->tx_packets = stats->tx.tx_frames_ok;
833 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
834 net_stats->tx_errors = stats->tx.tx_errors;
835 net_stats->tx_dropped = stats->tx.tx_drops;
837 net_stats->rx_packets = stats->rx.rx_frames_ok;
838 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
839 net_stats->rx_errors = stats->rx.rx_errors;
840 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
841 net_stats->rx_over_errors = enic->rq_truncated_pkts;
842 net_stats->rx_crc_errors = enic->rq_bad_fcs;
843 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
848 void enic_reset_addr_lists(struct enic *enic)
855 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
857 struct enic *enic = netdev_priv(netdev);
859 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
860 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
861 return -EADDRNOTAVAIL;
863 if (!is_valid_ether_addr(addr))
864 return -EADDRNOTAVAIL;
867 memcpy(netdev->dev_addr, addr, netdev->addr_len);
872 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
874 struct enic *enic = netdev_priv(netdev);
875 struct sockaddr *saddr = p;
876 char *addr = saddr->sa_data;
879 if (netif_running(enic->netdev)) {
880 err = enic_dev_del_station_addr(enic);
885 err = enic_set_mac_addr(netdev, addr);
889 if (netif_running(enic->netdev)) {
890 err = enic_dev_add_station_addr(enic);
898 static int enic_set_mac_address(struct net_device *netdev, void *p)
900 struct sockaddr *saddr = p;
901 char *addr = saddr->sa_data;
902 struct enic *enic = netdev_priv(netdev);
905 err = enic_dev_del_station_addr(enic);
909 err = enic_set_mac_addr(netdev, addr);
913 return enic_dev_add_station_addr(enic);
916 static void enic_update_multicast_addr_list(struct enic *enic)
918 struct net_device *netdev = enic->netdev;
919 struct netdev_hw_addr *ha;
920 unsigned int mc_count = netdev_mc_count(netdev);
921 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
924 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
925 netdev_warn(netdev, "Registering only %d out of %d "
926 "multicast addresses\n",
927 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
928 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
931 /* Is there an easier way? Trying to minimize to
932 * calls to add/del multicast addrs. We keep the
933 * addrs from the last call in enic->mc_addr and
934 * look for changes to add/del.
938 netdev_for_each_mc_addr(ha, netdev) {
941 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
944 for (i = 0; i < enic->mc_count; i++) {
945 for (j = 0; j < mc_count; j++)
946 if (ether_addr_equal(enic->mc_addr[i], mc_addr[j]))
949 enic_dev_del_addr(enic, enic->mc_addr[i]);
952 for (i = 0; i < mc_count; i++) {
953 for (j = 0; j < enic->mc_count; j++)
954 if (ether_addr_equal(mc_addr[i], enic->mc_addr[j]))
956 if (j == enic->mc_count)
957 enic_dev_add_addr(enic, mc_addr[i]);
960 /* Save the list to compare against next time
963 for (i = 0; i < mc_count; i++)
964 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
966 enic->mc_count = mc_count;
969 static void enic_update_unicast_addr_list(struct enic *enic)
971 struct net_device *netdev = enic->netdev;
972 struct netdev_hw_addr *ha;
973 unsigned int uc_count = netdev_uc_count(netdev);
974 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
977 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
978 netdev_warn(netdev, "Registering only %d out of %d "
979 "unicast addresses\n",
980 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
981 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
984 /* Is there an easier way? Trying to minimize to
985 * calls to add/del unicast addrs. We keep the
986 * addrs from the last call in enic->uc_addr and
987 * look for changes to add/del.
991 netdev_for_each_uc_addr(ha, netdev) {
994 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
997 for (i = 0; i < enic->uc_count; i++) {
998 for (j = 0; j < uc_count; j++)
999 if (ether_addr_equal(enic->uc_addr[i], uc_addr[j]))
1002 enic_dev_del_addr(enic, enic->uc_addr[i]);
1005 for (i = 0; i < uc_count; i++) {
1006 for (j = 0; j < enic->uc_count; j++)
1007 if (ether_addr_equal(uc_addr[i], enic->uc_addr[j]))
1009 if (j == enic->uc_count)
1010 enic_dev_add_addr(enic, uc_addr[i]);
1013 /* Save the list to compare against next time
1016 for (i = 0; i < uc_count; i++)
1017 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1019 enic->uc_count = uc_count;
1022 /* netif_tx_lock held, BHs disabled */
1023 static void enic_set_rx_mode(struct net_device *netdev)
1025 struct enic *enic = netdev_priv(netdev);
1027 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1028 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1029 int promisc = (netdev->flags & IFF_PROMISC) ||
1030 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1031 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1032 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1033 unsigned int flags = netdev->flags |
1034 (allmulti ? IFF_ALLMULTI : 0) |
1035 (promisc ? IFF_PROMISC : 0);
1037 if (enic->flags != flags) {
1038 enic->flags = flags;
1039 enic_dev_packet_filter(enic, directed,
1040 multicast, broadcast, promisc, allmulti);
1044 enic_update_unicast_addr_list(enic);
1046 enic_update_multicast_addr_list(enic);
1050 /* netif_tx_lock held, BHs disabled */
1051 static void enic_tx_timeout(struct net_device *netdev)
1053 struct enic *enic = netdev_priv(netdev);
1054 schedule_work(&enic->reset);
1057 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1059 struct enic *enic = netdev_priv(netdev);
1060 struct enic_port_profile *pp;
1063 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1067 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1068 if (vf == PORT_SELF_VF) {
1069 memcpy(pp->vf_mac, mac, ETH_ALEN);
1073 * For sriov vf's set the mac in hw
1075 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1076 vnic_dev_set_mac_addr, mac);
1077 return enic_dev_status_to_errno(err);
1083 static int enic_set_vf_port(struct net_device *netdev, int vf,
1084 struct nlattr *port[])
1086 struct enic *enic = netdev_priv(netdev);
1087 struct enic_port_profile prev_pp;
1088 struct enic_port_profile *pp;
1089 int err = 0, restore_pp = 1;
1091 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1095 if (!port[IFLA_PORT_REQUEST])
1098 memcpy(&prev_pp, pp, sizeof(*enic->pp));
1099 memset(pp, 0, sizeof(*enic->pp));
1101 pp->set |= ENIC_SET_REQUEST;
1102 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1104 if (port[IFLA_PORT_PROFILE]) {
1105 pp->set |= ENIC_SET_NAME;
1106 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1110 if (port[IFLA_PORT_INSTANCE_UUID]) {
1111 pp->set |= ENIC_SET_INSTANCE;
1112 memcpy(pp->instance_uuid,
1113 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1116 if (port[IFLA_PORT_HOST_UUID]) {
1117 pp->set |= ENIC_SET_HOST;
1118 memcpy(pp->host_uuid,
1119 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1122 if (vf == PORT_SELF_VF) {
1123 /* Special case handling: mac came from IFLA_VF_MAC */
1124 if (!is_zero_ether_addr(prev_pp.vf_mac))
1125 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1127 if (is_zero_ether_addr(netdev->dev_addr))
1128 eth_hw_addr_random(netdev);
1130 /* SR-IOV VF: get mac from adapter */
1131 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1132 vnic_dev_get_mac_addr, pp->mac_addr);
1134 netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1135 memcpy(pp, &prev_pp, sizeof(*pp));
1136 return enic_dev_status_to_errno(err);
1140 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1143 /* Things are still the way they were: Implicit
1144 * DISASSOCIATE failed
1146 memcpy(pp, &prev_pp, sizeof(*pp));
1148 memset(pp, 0, sizeof(*pp));
1149 if (vf == PORT_SELF_VF)
1150 memset(netdev->dev_addr, 0, ETH_ALEN);
1153 /* Set flag to indicate that the port assoc/disassoc
1154 * request has been sent out to fw
1156 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1158 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1159 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1160 memset(pp->mac_addr, 0, ETH_ALEN);
1161 if (vf == PORT_SELF_VF)
1162 memset(netdev->dev_addr, 0, ETH_ALEN);
1166 if (vf == PORT_SELF_VF)
1167 memset(pp->vf_mac, 0, ETH_ALEN);
1172 static int enic_get_vf_port(struct net_device *netdev, int vf,
1173 struct sk_buff *skb)
1175 struct enic *enic = netdev_priv(netdev);
1176 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1177 struct enic_port_profile *pp;
1180 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1184 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1187 err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1191 if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
1192 nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
1193 ((pp->set & ENIC_SET_NAME) &&
1194 nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
1195 ((pp->set & ENIC_SET_INSTANCE) &&
1196 nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1197 pp->instance_uuid)) ||
1198 ((pp->set & ENIC_SET_HOST) &&
1199 nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
1200 goto nla_put_failure;
1207 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1209 struct enic *enic = vnic_dev_priv(rq->vdev);
1214 pci_unmap_single(enic->pdev, buf->dma_addr,
1215 buf->len, PCI_DMA_FROMDEVICE);
1216 dev_kfree_skb_any(buf->os_buf);
1219 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1221 struct enic *enic = vnic_dev_priv(rq->vdev);
1222 struct net_device *netdev = enic->netdev;
1223 struct sk_buff *skb;
1224 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1225 unsigned int os_buf_index = 0;
1226 dma_addr_t dma_addr;
1228 skb = netdev_alloc_skb_ip_align(netdev, len);
1232 dma_addr = pci_map_single(enic->pdev, skb->data,
1233 len, PCI_DMA_FROMDEVICE);
1235 enic_queue_rq_desc(rq, skb, os_buf_index,
1241 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1242 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1243 int skipped, void *opaque)
1245 struct enic *enic = vnic_dev_priv(rq->vdev);
1246 struct net_device *netdev = enic->netdev;
1247 struct sk_buff *skb;
1249 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1250 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1251 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1252 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1254 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1261 prefetch(skb->data - NET_IP_ALIGN);
1262 pci_unmap_single(enic->pdev, buf->dma_addr,
1263 buf->len, PCI_DMA_FROMDEVICE);
1265 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1266 &type, &color, &q_number, &completed_index,
1267 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1268 &csum_not_calc, &rss_hash, &bytes_written,
1269 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1270 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1271 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1272 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1278 if (bytes_written > 0)
1280 else if (bytes_written == 0)
1281 enic->rq_truncated_pkts++;
1284 dev_kfree_skb_any(skb);
1289 if (eop && bytes_written > 0) {
1294 skb_put(skb, bytes_written);
1295 skb->protocol = eth_type_trans(skb, netdev);
1297 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1298 skb->csum = htons(checksum);
1299 skb->ip_summed = CHECKSUM_COMPLETE;
1303 __vlan_hwaccel_put_tag(skb, vlan_tci);
1305 if (netdev->features & NETIF_F_GRO)
1306 napi_gro_receive(&enic->napi[q_number], skb);
1308 netif_receive_skb(skb);
1314 dev_kfree_skb_any(skb);
1318 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1319 u8 type, u16 q_number, u16 completed_index, void *opaque)
1321 struct enic *enic = vnic_dev_priv(vdev);
1323 vnic_rq_service(&enic->rq[q_number], cq_desc,
1324 completed_index, VNIC_RQ_RETURN_DESC,
1325 enic_rq_indicate_buf, opaque);
1330 static int enic_poll(struct napi_struct *napi, int budget)
1332 struct net_device *netdev = napi->dev;
1333 struct enic *enic = netdev_priv(netdev);
1334 unsigned int cq_rq = enic_cq_rq(enic, 0);
1335 unsigned int cq_wq = enic_cq_wq(enic, 0);
1336 unsigned int intr = enic_legacy_io_intr();
1337 unsigned int rq_work_to_do = budget;
1338 unsigned int wq_work_to_do = -1; /* no limit */
1339 unsigned int work_done, rq_work_done, wq_work_done;
1342 /* Service RQ (first) and WQ
1345 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1346 rq_work_to_do, enic_rq_service, NULL);
1348 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1349 wq_work_to_do, enic_wq_service, NULL);
1351 /* Accumulate intr event credits for this polling
1352 * cycle. An intr event is the completion of a
1353 * a WQ or RQ packet.
1356 work_done = rq_work_done + wq_work_done;
1359 vnic_intr_return_credits(&enic->intr[intr],
1361 0 /* don't unmask intr */,
1362 0 /* don't reset intr timer */);
1364 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1366 /* Buffer allocation failed. Stay in polling
1367 * mode so we can try to fill the ring again.
1371 rq_work_done = rq_work_to_do;
1373 if (rq_work_done < rq_work_to_do) {
1375 /* Some work done, but not enough to stay in polling,
1379 napi_complete(napi);
1380 vnic_intr_unmask(&enic->intr[intr]);
1383 return rq_work_done;
1386 static int enic_poll_msix(struct napi_struct *napi, int budget)
1388 struct net_device *netdev = napi->dev;
1389 struct enic *enic = netdev_priv(netdev);
1390 unsigned int rq = (napi - &enic->napi[0]);
1391 unsigned int cq = enic_cq_rq(enic, rq);
1392 unsigned int intr = enic_msix_rq_intr(enic, rq);
1393 unsigned int work_to_do = budget;
1394 unsigned int work_done;
1400 work_done = vnic_cq_service(&enic->cq[cq],
1401 work_to_do, enic_rq_service, NULL);
1403 /* Return intr event credits for this polling
1404 * cycle. An intr event is the completion of a
1409 vnic_intr_return_credits(&enic->intr[intr],
1411 0 /* don't unmask intr */,
1412 0 /* don't reset intr timer */);
1414 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1416 /* Buffer allocation failed. Stay in polling mode
1417 * so we can try to fill the ring again.
1421 work_done = work_to_do;
1423 if (work_done < work_to_do) {
1425 /* Some work done, but not enough to stay in polling,
1429 napi_complete(napi);
1430 vnic_intr_unmask(&enic->intr[intr]);
1436 static void enic_notify_timer(unsigned long data)
1438 struct enic *enic = (struct enic *)data;
1440 enic_notify_check(enic);
1442 mod_timer(&enic->notify_timer,
1443 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1446 static void enic_free_intr(struct enic *enic)
1448 struct net_device *netdev = enic->netdev;
1451 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1452 case VNIC_DEV_INTR_MODE_INTX:
1453 free_irq(enic->pdev->irq, netdev);
1455 case VNIC_DEV_INTR_MODE_MSI:
1456 free_irq(enic->pdev->irq, enic);
1458 case VNIC_DEV_INTR_MODE_MSIX:
1459 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1460 if (enic->msix[i].requested)
1461 free_irq(enic->msix_entry[i].vector,
1462 enic->msix[i].devid);
1469 static int enic_request_intr(struct enic *enic)
1471 struct net_device *netdev = enic->netdev;
1472 unsigned int i, intr;
1475 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1477 case VNIC_DEV_INTR_MODE_INTX:
1479 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1480 IRQF_SHARED, netdev->name, netdev);
1483 case VNIC_DEV_INTR_MODE_MSI:
1485 err = request_irq(enic->pdev->irq, enic_isr_msi,
1486 0, netdev->name, enic);
1489 case VNIC_DEV_INTR_MODE_MSIX:
1491 for (i = 0; i < enic->rq_count; i++) {
1492 intr = enic_msix_rq_intr(enic, i);
1493 snprintf(enic->msix[intr].devname,
1494 sizeof(enic->msix[intr].devname),
1495 "%.11s-rx-%d", netdev->name, i);
1496 enic->msix[intr].isr = enic_isr_msix_rq;
1497 enic->msix[intr].devid = &enic->napi[i];
1500 for (i = 0; i < enic->wq_count; i++) {
1501 intr = enic_msix_wq_intr(enic, i);
1502 snprintf(enic->msix[intr].devname,
1503 sizeof(enic->msix[intr].devname),
1504 "%.11s-tx-%d", netdev->name, i);
1505 enic->msix[intr].isr = enic_isr_msix_wq;
1506 enic->msix[intr].devid = enic;
1509 intr = enic_msix_err_intr(enic);
1510 snprintf(enic->msix[intr].devname,
1511 sizeof(enic->msix[intr].devname),
1512 "%.11s-err", netdev->name);
1513 enic->msix[intr].isr = enic_isr_msix_err;
1514 enic->msix[intr].devid = enic;
1516 intr = enic_msix_notify_intr(enic);
1517 snprintf(enic->msix[intr].devname,
1518 sizeof(enic->msix[intr].devname),
1519 "%.11s-notify", netdev->name);
1520 enic->msix[intr].isr = enic_isr_msix_notify;
1521 enic->msix[intr].devid = enic;
1523 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1524 enic->msix[i].requested = 0;
1526 for (i = 0; i < enic->intr_count; i++) {
1527 err = request_irq(enic->msix_entry[i].vector,
1528 enic->msix[i].isr, 0,
1529 enic->msix[i].devname,
1530 enic->msix[i].devid);
1532 enic_free_intr(enic);
1535 enic->msix[i].requested = 1;
1547 static void enic_synchronize_irqs(struct enic *enic)
1551 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1552 case VNIC_DEV_INTR_MODE_INTX:
1553 case VNIC_DEV_INTR_MODE_MSI:
1554 synchronize_irq(enic->pdev->irq);
1556 case VNIC_DEV_INTR_MODE_MSIX:
1557 for (i = 0; i < enic->intr_count; i++)
1558 synchronize_irq(enic->msix_entry[i].vector);
1565 static int enic_dev_notify_set(struct enic *enic)
1569 spin_lock(&enic->devcmd_lock);
1570 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1571 case VNIC_DEV_INTR_MODE_INTX:
1572 err = vnic_dev_notify_set(enic->vdev,
1573 enic_legacy_notify_intr());
1575 case VNIC_DEV_INTR_MODE_MSIX:
1576 err = vnic_dev_notify_set(enic->vdev,
1577 enic_msix_notify_intr(enic));
1580 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1583 spin_unlock(&enic->devcmd_lock);
1588 static void enic_notify_timer_start(struct enic *enic)
1590 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1591 case VNIC_DEV_INTR_MODE_MSI:
1592 mod_timer(&enic->notify_timer, jiffies);
1595 /* Using intr for notification for INTx/MSI-X */
1600 /* rtnl lock is held, process context */
1601 static int enic_open(struct net_device *netdev)
1603 struct enic *enic = netdev_priv(netdev);
1607 err = enic_request_intr(enic);
1609 netdev_err(netdev, "Unable to request irq.\n");
1613 err = enic_dev_notify_set(enic);
1616 "Failed to alloc notify buffer, aborting.\n");
1617 goto err_out_free_intr;
1620 for (i = 0; i < enic->rq_count; i++) {
1621 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1622 /* Need at least one buffer on ring to get going */
1623 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1624 netdev_err(netdev, "Unable to alloc receive buffers\n");
1626 goto err_out_notify_unset;
1630 for (i = 0; i < enic->wq_count; i++)
1631 vnic_wq_enable(&enic->wq[i]);
1632 for (i = 0; i < enic->rq_count; i++)
1633 vnic_rq_enable(&enic->rq[i]);
1635 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1636 enic_dev_add_station_addr(enic);
1638 enic_set_rx_mode(netdev);
1640 netif_wake_queue(netdev);
1642 for (i = 0; i < enic->rq_count; i++)
1643 napi_enable(&enic->napi[i]);
1645 enic_dev_enable(enic);
1647 for (i = 0; i < enic->intr_count; i++)
1648 vnic_intr_unmask(&enic->intr[i]);
1650 enic_notify_timer_start(enic);
1654 err_out_notify_unset:
1655 enic_dev_notify_unset(enic);
1657 enic_free_intr(enic);
1662 /* rtnl lock is held, process context */
1663 static int enic_stop(struct net_device *netdev)
1665 struct enic *enic = netdev_priv(netdev);
1669 for (i = 0; i < enic->intr_count; i++) {
1670 vnic_intr_mask(&enic->intr[i]);
1671 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1674 enic_synchronize_irqs(enic);
1676 del_timer_sync(&enic->notify_timer);
1678 enic_dev_disable(enic);
1680 for (i = 0; i < enic->rq_count; i++)
1681 napi_disable(&enic->napi[i]);
1683 netif_carrier_off(netdev);
1684 netif_tx_disable(netdev);
1686 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1687 enic_dev_del_station_addr(enic);
1689 for (i = 0; i < enic->wq_count; i++) {
1690 err = vnic_wq_disable(&enic->wq[i]);
1694 for (i = 0; i < enic->rq_count; i++) {
1695 err = vnic_rq_disable(&enic->rq[i]);
1700 enic_dev_notify_unset(enic);
1701 enic_free_intr(enic);
1703 for (i = 0; i < enic->wq_count; i++)
1704 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1705 for (i = 0; i < enic->rq_count; i++)
1706 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1707 for (i = 0; i < enic->cq_count; i++)
1708 vnic_cq_clean(&enic->cq[i]);
1709 for (i = 0; i < enic->intr_count; i++)
1710 vnic_intr_clean(&enic->intr[i]);
1715 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1717 struct enic *enic = netdev_priv(netdev);
1718 int running = netif_running(netdev);
1720 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1723 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1729 netdev->mtu = new_mtu;
1731 if (netdev->mtu > enic->port_mtu)
1733 "interface MTU (%d) set higher than port MTU (%d)\n",
1734 netdev->mtu, enic->port_mtu);
1742 static void enic_change_mtu_work(struct work_struct *work)
1744 struct enic *enic = container_of(work, struct enic, change_mtu_work);
1745 struct net_device *netdev = enic->netdev;
1746 int new_mtu = vnic_dev_mtu(enic->vdev);
1750 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1755 del_timer_sync(&enic->notify_timer);
1757 for (i = 0; i < enic->rq_count; i++)
1758 napi_disable(&enic->napi[i]);
1760 vnic_intr_mask(&enic->intr[0]);
1761 enic_synchronize_irqs(enic);
1762 err = vnic_rq_disable(&enic->rq[0]);
1764 netdev_err(netdev, "Unable to disable RQ.\n");
1767 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1768 vnic_cq_clean(&enic->cq[0]);
1769 vnic_intr_clean(&enic->intr[0]);
1771 /* Fill RQ with new_mtu-sized buffers */
1772 netdev->mtu = new_mtu;
1773 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1774 /* Need at least one buffer on ring to get going */
1775 if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1776 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1781 vnic_rq_enable(&enic->rq[0]);
1782 napi_enable(&enic->napi[0]);
1783 vnic_intr_unmask(&enic->intr[0]);
1784 enic_notify_timer_start(enic);
1788 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1791 #ifdef CONFIG_NET_POLL_CONTROLLER
1792 static void enic_poll_controller(struct net_device *netdev)
1794 struct enic *enic = netdev_priv(netdev);
1795 struct vnic_dev *vdev = enic->vdev;
1796 unsigned int i, intr;
1798 switch (vnic_dev_get_intr_mode(vdev)) {
1799 case VNIC_DEV_INTR_MODE_MSIX:
1800 for (i = 0; i < enic->rq_count; i++) {
1801 intr = enic_msix_rq_intr(enic, i);
1802 enic_isr_msix_rq(enic->msix_entry[intr].vector,
1806 for (i = 0; i < enic->wq_count; i++) {
1807 intr = enic_msix_wq_intr(enic, i);
1808 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1812 case VNIC_DEV_INTR_MODE_MSI:
1813 enic_isr_msi(enic->pdev->irq, enic);
1815 case VNIC_DEV_INTR_MODE_INTX:
1816 enic_isr_legacy(enic->pdev->irq, netdev);
1824 static int enic_dev_wait(struct vnic_dev *vdev,
1825 int (*start)(struct vnic_dev *, int),
1826 int (*finished)(struct vnic_dev *, int *),
1833 BUG_ON(in_interrupt());
1835 err = start(vdev, arg);
1839 /* Wait for func to complete...2 seconds max
1842 time = jiffies + (HZ * 2);
1845 err = finished(vdev, &done);
1852 schedule_timeout_uninterruptible(HZ / 10);
1854 } while (time_after(time, jiffies));
1859 static int enic_dev_open(struct enic *enic)
1863 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1864 vnic_dev_open_done, 0);
1866 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1872 static int enic_dev_hang_reset(struct enic *enic)
1876 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1877 vnic_dev_hang_reset_done, 0);
1879 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1885 static int enic_set_rsskey(struct enic *enic)
1887 dma_addr_t rss_key_buf_pa;
1888 union vnic_rss_key *rss_key_buf_va = NULL;
1889 union vnic_rss_key rss_key = {
1890 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1891 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1892 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1893 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1897 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1898 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1899 if (!rss_key_buf_va)
1902 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1904 spin_lock(&enic->devcmd_lock);
1905 err = enic_set_rss_key(enic,
1907 sizeof(union vnic_rss_key));
1908 spin_unlock(&enic->devcmd_lock);
1910 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1911 rss_key_buf_va, rss_key_buf_pa);
1916 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1918 dma_addr_t rss_cpu_buf_pa;
1919 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1923 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1924 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1925 if (!rss_cpu_buf_va)
1928 for (i = 0; i < (1 << rss_hash_bits); i++)
1929 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1931 spin_lock(&enic->devcmd_lock);
1932 err = enic_set_rss_cpu(enic,
1934 sizeof(union vnic_rss_cpu));
1935 spin_unlock(&enic->devcmd_lock);
1937 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1938 rss_cpu_buf_va, rss_cpu_buf_pa);
1943 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1944 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1946 const u8 tso_ipid_split_en = 0;
1947 const u8 ig_vlan_strip_en = 1;
1950 /* Enable VLAN tag stripping.
1953 spin_lock(&enic->devcmd_lock);
1954 err = enic_set_nic_cfg(enic,
1955 rss_default_cpu, rss_hash_type,
1956 rss_hash_bits, rss_base_cpu,
1957 rss_enable, tso_ipid_split_en,
1959 spin_unlock(&enic->devcmd_lock);
1964 static int enic_set_rss_nic_cfg(struct enic *enic)
1966 struct device *dev = enic_get_dev(enic);
1967 const u8 rss_default_cpu = 0;
1968 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1969 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1970 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1971 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1972 const u8 rss_hash_bits = 7;
1973 const u8 rss_base_cpu = 0;
1974 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1977 if (!enic_set_rsskey(enic)) {
1978 if (enic_set_rsscpu(enic, rss_hash_bits)) {
1980 dev_warn(dev, "RSS disabled, "
1981 "Failed to set RSS cpu indirection table.");
1985 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1989 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1990 rss_hash_bits, rss_base_cpu, rss_enable);
1993 static void enic_reset(struct work_struct *work)
1995 struct enic *enic = container_of(work, struct enic, reset);
1997 if (!netif_running(enic->netdev))
2002 enic_dev_hang_notify(enic);
2003 enic_stop(enic->netdev);
2004 enic_dev_hang_reset(enic);
2005 enic_reset_addr_lists(enic);
2006 enic_init_vnic_resources(enic);
2007 enic_set_rss_nic_cfg(enic);
2008 enic_dev_set_ig_vlan_rewrite_mode(enic);
2009 enic_open(enic->netdev);
2014 static int enic_set_intr_mode(struct enic *enic)
2016 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2017 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2020 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2021 * on system capabilities.
2025 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2026 * (the second to last INTR is used for WQ/RQ errors)
2027 * (the last INTR is used for notifications)
2030 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2031 for (i = 0; i < n + m + 2; i++)
2032 enic->msix_entry[i].entry = i;
2034 /* Use multiple RQs if RSS is enabled
2037 if (ENIC_SETTING(enic, RSS) &&
2038 enic->config.intr_mode < 1 &&
2039 enic->rq_count >= n &&
2040 enic->wq_count >= m &&
2041 enic->cq_count >= n + m &&
2042 enic->intr_count >= n + m + 2) {
2044 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2048 enic->cq_count = n + m;
2049 enic->intr_count = n + m + 2;
2051 vnic_dev_set_intr_mode(enic->vdev,
2052 VNIC_DEV_INTR_MODE_MSIX);
2058 if (enic->config.intr_mode < 1 &&
2059 enic->rq_count >= 1 &&
2060 enic->wq_count >= m &&
2061 enic->cq_count >= 1 + m &&
2062 enic->intr_count >= 1 + m + 2) {
2063 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2067 enic->cq_count = 1 + m;
2068 enic->intr_count = 1 + m + 2;
2070 vnic_dev_set_intr_mode(enic->vdev,
2071 VNIC_DEV_INTR_MODE_MSIX);
2079 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2082 if (enic->config.intr_mode < 2 &&
2083 enic->rq_count >= 1 &&
2084 enic->wq_count >= 1 &&
2085 enic->cq_count >= 2 &&
2086 enic->intr_count >= 1 &&
2087 !pci_enable_msi(enic->pdev)) {
2092 enic->intr_count = 1;
2094 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2101 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2102 * (the first INTR is used for WQ/RQ)
2103 * (the second INTR is used for WQ/RQ errors)
2104 * (the last INTR is used for notifications)
2107 if (enic->config.intr_mode < 3 &&
2108 enic->rq_count >= 1 &&
2109 enic->wq_count >= 1 &&
2110 enic->cq_count >= 2 &&
2111 enic->intr_count >= 3) {
2116 enic->intr_count = 3;
2118 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2123 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2128 static void enic_clear_intr_mode(struct enic *enic)
2130 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2131 case VNIC_DEV_INTR_MODE_MSIX:
2132 pci_disable_msix(enic->pdev);
2134 case VNIC_DEV_INTR_MODE_MSI:
2135 pci_disable_msi(enic->pdev);
2141 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2144 static const struct net_device_ops enic_netdev_dynamic_ops = {
2145 .ndo_open = enic_open,
2146 .ndo_stop = enic_stop,
2147 .ndo_start_xmit = enic_hard_start_xmit,
2148 .ndo_get_stats64 = enic_get_stats,
2149 .ndo_validate_addr = eth_validate_addr,
2150 .ndo_set_rx_mode = enic_set_rx_mode,
2151 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2152 .ndo_change_mtu = enic_change_mtu,
2153 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2154 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2155 .ndo_tx_timeout = enic_tx_timeout,
2156 .ndo_set_vf_port = enic_set_vf_port,
2157 .ndo_get_vf_port = enic_get_vf_port,
2158 .ndo_set_vf_mac = enic_set_vf_mac,
2159 #ifdef CONFIG_NET_POLL_CONTROLLER
2160 .ndo_poll_controller = enic_poll_controller,
2164 static const struct net_device_ops enic_netdev_ops = {
2165 .ndo_open = enic_open,
2166 .ndo_stop = enic_stop,
2167 .ndo_start_xmit = enic_hard_start_xmit,
2168 .ndo_get_stats64 = enic_get_stats,
2169 .ndo_validate_addr = eth_validate_addr,
2170 .ndo_set_mac_address = enic_set_mac_address,
2171 .ndo_set_rx_mode = enic_set_rx_mode,
2172 .ndo_change_mtu = enic_change_mtu,
2173 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2174 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2175 .ndo_tx_timeout = enic_tx_timeout,
2176 .ndo_set_vf_port = enic_set_vf_port,
2177 .ndo_get_vf_port = enic_get_vf_port,
2178 .ndo_set_vf_mac = enic_set_vf_mac,
2179 #ifdef CONFIG_NET_POLL_CONTROLLER
2180 .ndo_poll_controller = enic_poll_controller,
2184 static void enic_dev_deinit(struct enic *enic)
2188 for (i = 0; i < enic->rq_count; i++)
2189 netif_napi_del(&enic->napi[i]);
2191 enic_free_vnic_resources(enic);
2192 enic_clear_intr_mode(enic);
2195 static int enic_dev_init(struct enic *enic)
2197 struct device *dev = enic_get_dev(enic);
2198 struct net_device *netdev = enic->netdev;
2202 /* Get interrupt coalesce timer info */
2203 err = enic_dev_intr_coal_timer_info(enic);
2205 dev_warn(dev, "Using default conversion factor for "
2206 "interrupt coalesce timer\n");
2207 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2210 /* Get vNIC configuration
2213 err = enic_get_vnic_config(enic);
2215 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2219 /* Get available resource counts
2222 enic_get_res_counts(enic);
2224 /* Set interrupt mode based on resource counts and system
2228 err = enic_set_intr_mode(enic);
2230 dev_err(dev, "Failed to set intr mode based on resource "
2231 "counts and system capabilities, aborting\n");
2235 /* Allocate and configure vNIC resources
2238 err = enic_alloc_vnic_resources(enic);
2240 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2241 goto err_out_free_vnic_resources;
2244 enic_init_vnic_resources(enic);
2246 err = enic_set_rss_nic_cfg(enic);
2248 dev_err(dev, "Failed to config nic, aborting\n");
2249 goto err_out_free_vnic_resources;
2252 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2254 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2256 case VNIC_DEV_INTR_MODE_MSIX:
2257 for (i = 0; i < enic->rq_count; i++)
2258 netif_napi_add(netdev, &enic->napi[i],
2259 enic_poll_msix, 64);
2265 err_out_free_vnic_resources:
2266 enic_clear_intr_mode(enic);
2267 enic_free_vnic_resources(enic);
2272 static void enic_iounmap(struct enic *enic)
2276 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2277 if (enic->bar[i].vaddr)
2278 iounmap(enic->bar[i].vaddr);
2281 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2283 struct device *dev = &pdev->dev;
2284 struct net_device *netdev;
2289 #ifdef CONFIG_PCI_IOV
2294 /* Allocate net device structure and initialize. Private
2295 * instance data is initialized to zero.
2298 netdev = alloc_etherdev(sizeof(struct enic));
2302 pci_set_drvdata(pdev, netdev);
2304 SET_NETDEV_DEV(netdev, &pdev->dev);
2306 enic = netdev_priv(netdev);
2307 enic->netdev = netdev;
2310 /* Setup PCI resources
2313 err = pci_enable_device_mem(pdev);
2315 dev_err(dev, "Cannot enable PCI device, aborting\n");
2316 goto err_out_free_netdev;
2319 err = pci_request_regions(pdev, DRV_NAME);
2321 dev_err(dev, "Cannot request PCI regions, aborting\n");
2322 goto err_out_disable_device;
2325 pci_set_master(pdev);
2327 /* Query PCI controller on system for DMA addressing
2328 * limitation for the device. Try 40-bit first, and
2332 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2334 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2336 dev_err(dev, "No usable DMA configuration, aborting\n");
2337 goto err_out_release_regions;
2339 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2341 dev_err(dev, "Unable to obtain %u-bit DMA "
2342 "for consistent allocations, aborting\n", 32);
2343 goto err_out_release_regions;
2346 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2348 dev_err(dev, "Unable to obtain %u-bit DMA "
2349 "for consistent allocations, aborting\n", 40);
2350 goto err_out_release_regions;
2355 /* Map vNIC resources from BAR0-5
2358 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2359 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2361 enic->bar[i].len = pci_resource_len(pdev, i);
2362 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2363 if (!enic->bar[i].vaddr) {
2364 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2366 goto err_out_iounmap;
2368 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2371 /* Register vNIC device
2374 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2375 ARRAY_SIZE(enic->bar));
2377 dev_err(dev, "vNIC registration failed, aborting\n");
2379 goto err_out_iounmap;
2382 #ifdef CONFIG_PCI_IOV
2383 /* Get number of subvnics */
2384 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2386 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2388 if (enic->num_vfs) {
2389 err = pci_enable_sriov(pdev, enic->num_vfs);
2391 dev_err(dev, "SRIOV enable failed, aborting."
2392 " pci_enable_sriov() returned %d\n",
2394 goto err_out_vnic_unregister;
2396 enic->priv_flags |= ENIC_SRIOV_ENABLED;
2397 num_pps = enic->num_vfs;
2402 /* Allocate structure for port profiles */
2403 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2406 goto err_out_disable_sriov_pp;
2409 /* Issue device open to get device in known state
2412 err = enic_dev_open(enic);
2414 dev_err(dev, "vNIC dev open failed, aborting\n");
2415 goto err_out_disable_sriov;
2418 /* Setup devcmd lock
2421 spin_lock_init(&enic->devcmd_lock);
2424 * Set ingress vlan rewrite mode before vnic initialization
2427 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2430 "Failed to set ingress vlan rewrite mode, aborting.\n");
2431 goto err_out_dev_close;
2434 /* Issue device init to initialize the vnic-to-switch link.
2435 * We'll start with carrier off and wait for link UP
2436 * notification later to turn on carrier. We don't need
2437 * to wait here for the vnic-to-switch link initialization
2438 * to complete; link UP notification is the indication that
2439 * the process is complete.
2442 netif_carrier_off(netdev);
2444 /* Do not call dev_init for a dynamic vnic.
2445 * For a dynamic vnic, init_prov_info will be
2446 * called later by an upper layer.
2449 if (!enic_is_dynamic(enic)) {
2450 err = vnic_dev_init(enic->vdev, 0);
2452 dev_err(dev, "vNIC dev init failed, aborting\n");
2453 goto err_out_dev_close;
2457 err = enic_dev_init(enic);
2459 dev_err(dev, "Device initialization failed, aborting\n");
2460 goto err_out_dev_close;
2463 /* Setup notification timer, HW reset task, and wq locks
2466 init_timer(&enic->notify_timer);
2467 enic->notify_timer.function = enic_notify_timer;
2468 enic->notify_timer.data = (unsigned long)enic;
2470 INIT_WORK(&enic->reset, enic_reset);
2471 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2473 for (i = 0; i < enic->wq_count; i++)
2474 spin_lock_init(&enic->wq_lock[i]);
2476 /* Register net device
2479 enic->port_mtu = enic->config.mtu;
2480 (void)enic_change_mtu(netdev, enic->port_mtu);
2482 err = enic_set_mac_addr(netdev, enic->mac_addr);
2484 dev_err(dev, "Invalid MAC address, aborting\n");
2485 goto err_out_dev_deinit;
2488 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2489 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2491 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2492 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2494 netdev->netdev_ops = &enic_netdev_ops;
2496 netdev->watchdog_timeo = 2 * HZ;
2497 netdev->ethtool_ops = &enic_ethtool_ops;
2499 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2500 if (ENIC_SETTING(enic, LOOP)) {
2501 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2502 enic->loop_enable = 1;
2503 enic->loop_tag = enic->config.loop_tag;
2504 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2506 if (ENIC_SETTING(enic, TXCSUM))
2507 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2508 if (ENIC_SETTING(enic, TSO))
2509 netdev->hw_features |= NETIF_F_TSO |
2510 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2511 if (ENIC_SETTING(enic, RXCSUM))
2512 netdev->hw_features |= NETIF_F_RXCSUM;
2514 netdev->features |= netdev->hw_features;
2517 netdev->features |= NETIF_F_HIGHDMA;
2519 netdev->priv_flags |= IFF_UNICAST_FLT;
2521 err = register_netdev(netdev);
2523 dev_err(dev, "Cannot register net device, aborting\n");
2524 goto err_out_dev_deinit;
2530 enic_dev_deinit(enic);
2532 vnic_dev_close(enic->vdev);
2533 err_out_disable_sriov:
2535 err_out_disable_sriov_pp:
2536 #ifdef CONFIG_PCI_IOV
2537 if (enic_sriov_enabled(enic)) {
2538 pci_disable_sriov(pdev);
2539 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2541 err_out_vnic_unregister:
2543 vnic_dev_unregister(enic->vdev);
2546 err_out_release_regions:
2547 pci_release_regions(pdev);
2548 err_out_disable_device:
2549 pci_disable_device(pdev);
2550 err_out_free_netdev:
2551 pci_set_drvdata(pdev, NULL);
2552 free_netdev(netdev);
2557 static void enic_remove(struct pci_dev *pdev)
2559 struct net_device *netdev = pci_get_drvdata(pdev);
2562 struct enic *enic = netdev_priv(netdev);
2564 cancel_work_sync(&enic->reset);
2565 cancel_work_sync(&enic->change_mtu_work);
2566 unregister_netdev(netdev);
2567 enic_dev_deinit(enic);
2568 vnic_dev_close(enic->vdev);
2569 #ifdef CONFIG_PCI_IOV
2570 if (enic_sriov_enabled(enic)) {
2571 pci_disable_sriov(pdev);
2572 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2576 vnic_dev_unregister(enic->vdev);
2578 pci_release_regions(pdev);
2579 pci_disable_device(pdev);
2580 pci_set_drvdata(pdev, NULL);
2581 free_netdev(netdev);
2585 static struct pci_driver enic_driver = {
2587 .id_table = enic_id_table,
2588 .probe = enic_probe,
2589 .remove = enic_remove,
2592 static int __init enic_init_module(void)
2594 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2596 return pci_register_driver(&enic_driver);
2599 static void __exit enic_cleanup_module(void)
2601 pci_unregister_driver(&enic_driver);
2604 module_init(enic_init_module);
2605 module_exit(enic_cleanup_module);