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1/*
2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
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.
8 *
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
16 * SOFTWARE.
17 *
18 */
19
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>
31#include <linux/if.h>
32#include <linux/if_ether.h>
33#include <linux/if_vlan.h>
34#include <linux/in.h>
35#include <linux/ip.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#include <linux/numa.h>
43#ifdef CONFIG_RFS_ACCEL
44#include <linux/cpu_rmap.h>
45#endif
46#include <linux/crash_dump.h>
47#include <net/busy_poll.h>
48#include <net/vxlan.h>
49
50#include "cq_enet_desc.h"
51#include "vnic_dev.h"
52#include "vnic_intr.h"
53#include "vnic_stats.h"
54#include "vnic_vic.h"
55#include "enic_res.h"
56#include "enic.h"
57#include "enic_dev.h"
58#include "enic_pp.h"
59#include "enic_clsf.h"
60
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)
65
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 */
69
70#define RX_COPYBREAK_DEFAULT 256
71
72/* Supported devices */
73static 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 */
78};
79
80MODULE_DESCRIPTION(DRV_DESCRIPTION);
81MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
82MODULE_LICENSE("GPL");
83MODULE_DEVICE_TABLE(pci, enic_id_table);
84
85#define ENIC_LARGE_PKT_THRESHOLD 1000
86#define ENIC_MAX_COALESCE_TIMERS 10
87/* Interrupt moderation table, which will be used to decide the
88 * coalescing timer values
89 * {rx_rate in Mbps, mapping percentage of the range}
90 */
91static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = {
92 {4000, 0},
93 {4400, 10},
94 {5060, 20},
95 {5230, 30},
96 {5540, 40},
97 {5820, 50},
98 {6120, 60},
99 {6435, 70},
100 {6745, 80},
101 {7000, 90},
102 {0xFFFFFFFF, 100}
103};
104
105/* This table helps the driver to pick different ranges for rx coalescing
106 * timer depending on the link speed.
107 */
108static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = {
109 {0, 0}, /* 0 - 4 Gbps */
110 {0, 3}, /* 4 - 10 Gbps */
111 {3, 6}, /* 10 - 40 Gbps */
112};
113
114static void enic_init_affinity_hint(struct enic *enic)
115{
116 int numa_node = dev_to_node(&enic->pdev->dev);
117 int i;
118
119 for (i = 0; i < enic->intr_count; i++) {
120 if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) ||
121 (cpumask_available(enic->msix[i].affinity_mask) &&
122 !cpumask_empty(enic->msix[i].affinity_mask)))
123 continue;
124 if (zalloc_cpumask_var(&enic->msix[i].affinity_mask,
125 GFP_KERNEL))
126 cpumask_set_cpu(cpumask_local_spread(i, numa_node),
127 enic->msix[i].affinity_mask);
128 }
129}
130
131static void enic_free_affinity_hint(struct enic *enic)
132{
133 int i;
134
135 for (i = 0; i < enic->intr_count; i++) {
136 if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i))
137 continue;
138 free_cpumask_var(enic->msix[i].affinity_mask);
139 }
140}
141
142static void enic_set_affinity_hint(struct enic *enic)
143{
144 int i;
145 int err;
146
147 for (i = 0; i < enic->intr_count; i++) {
148 if (enic_is_err_intr(enic, i) ||
149 enic_is_notify_intr(enic, i) ||
150 !cpumask_available(enic->msix[i].affinity_mask) ||
151 cpumask_empty(enic->msix[i].affinity_mask))
152 continue;
153 err = irq_update_affinity_hint(enic->msix_entry[i].vector,
154 enic->msix[i].affinity_mask);
155 if (err)
156 netdev_warn(enic->netdev, "irq_update_affinity_hint failed, err %d\n",
157 err);
158 }
159
160 for (i = 0; i < enic->wq_count; i++) {
161 int wq_intr = enic_msix_wq_intr(enic, i);
162
163 if (cpumask_available(enic->msix[wq_intr].affinity_mask) &&
164 !cpumask_empty(enic->msix[wq_intr].affinity_mask))
165 netif_set_xps_queue(enic->netdev,
166 enic->msix[wq_intr].affinity_mask,
167 i);
168 }
169}
170
171static void enic_unset_affinity_hint(struct enic *enic)
172{
173 int i;
174
175 for (i = 0; i < enic->intr_count; i++)
176 irq_update_affinity_hint(enic->msix_entry[i].vector, NULL);
177}
178
179static int enic_udp_tunnel_set_port(struct net_device *netdev,
180 unsigned int table, unsigned int entry,
181 struct udp_tunnel_info *ti)
182{
183 struct enic *enic = netdev_priv(netdev);
184 int err;
185
186 spin_lock_bh(&enic->devcmd_lock);
187
188 err = vnic_dev_overlay_offload_cfg(enic->vdev,
189 OVERLAY_CFG_VXLAN_PORT_UPDATE,
190 ntohs(ti->port));
191 if (err)
192 goto error;
193
194 err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
195 enic->vxlan.patch_level);
196 if (err)
197 goto error;
198
199 enic->vxlan.vxlan_udp_port_number = ntohs(ti->port);
200error:
201 spin_unlock_bh(&enic->devcmd_lock);
202
203 return err;
204}
205
206static int enic_udp_tunnel_unset_port(struct net_device *netdev,
207 unsigned int table, unsigned int entry,
208 struct udp_tunnel_info *ti)
209{
210 struct enic *enic = netdev_priv(netdev);
211 int err;
212
213 spin_lock_bh(&enic->devcmd_lock);
214
215 err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
216 OVERLAY_OFFLOAD_DISABLE);
217 if (err)
218 goto unlock;
219
220 enic->vxlan.vxlan_udp_port_number = 0;
221
222unlock:
223 spin_unlock_bh(&enic->devcmd_lock);
224
225 return err;
226}
227
228static const struct udp_tunnel_nic_info enic_udp_tunnels = {
229 .set_port = enic_udp_tunnel_set_port,
230 .unset_port = enic_udp_tunnel_unset_port,
231 .tables = {
232 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
233 },
234}, enic_udp_tunnels_v4 = {
235 .set_port = enic_udp_tunnel_set_port,
236 .unset_port = enic_udp_tunnel_unset_port,
237 .flags = UDP_TUNNEL_NIC_INFO_IPV4_ONLY,
238 .tables = {
239 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
240 },
241};
242
243static netdev_features_t enic_features_check(struct sk_buff *skb,
244 struct net_device *dev,
245 netdev_features_t features)
246{
247 const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
248 struct enic *enic = netdev_priv(dev);
249 struct udphdr *udph;
250 u16 port = 0;
251 u8 proto;
252
253 if (!skb->encapsulation)
254 return features;
255
256 features = vxlan_features_check(skb, features);
257
258 switch (vlan_get_protocol(skb)) {
259 case htons(ETH_P_IPV6):
260 if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6))
261 goto out;
262 proto = ipv6_hdr(skb)->nexthdr;
263 break;
264 case htons(ETH_P_IP):
265 proto = ip_hdr(skb)->protocol;
266 break;
267 default:
268 goto out;
269 }
270
271 switch (eth->h_proto) {
272 case ntohs(ETH_P_IPV6):
273 if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6))
274 goto out;
275 fallthrough;
276 case ntohs(ETH_P_IP):
277 break;
278 default:
279 goto out;
280 }
281
282
283 if (proto == IPPROTO_UDP) {
284 udph = udp_hdr(skb);
285 port = be16_to_cpu(udph->dest);
286 }
287
288 /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK
289 * for other UDP port tunnels
290 */
291 if (port != enic->vxlan.vxlan_udp_port_number)
292 goto out;
293
294 return features;
295
296out:
297 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
298}
299
300int enic_is_dynamic(struct enic *enic)
301{
302 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
303}
304
305int enic_sriov_enabled(struct enic *enic)
306{
307 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
308}
309
310static int enic_is_sriov_vf(struct enic *enic)
311{
312 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
313}
314
315int enic_is_valid_vf(struct enic *enic, int vf)
316{
317#ifdef CONFIG_PCI_IOV
318 return vf >= 0 && vf < enic->num_vfs;
319#else
320 return 0;
321#endif
322}
323
324static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
325{
326 struct enic *enic = vnic_dev_priv(wq->vdev);
327
328 if (buf->sop)
329 dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
330 DMA_TO_DEVICE);
331 else
332 dma_unmap_page(&enic->pdev->dev, buf->dma_addr, buf->len,
333 DMA_TO_DEVICE);
334
335 if (buf->os_buf)
336 dev_kfree_skb_any(buf->os_buf);
337}
338
339static void enic_wq_free_buf(struct vnic_wq *wq,
340 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
341{
342 enic_free_wq_buf(wq, buf);
343}
344
345static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
346 u8 type, u16 q_number, u16 completed_index, void *opaque)
347{
348 struct enic *enic = vnic_dev_priv(vdev);
349
350 spin_lock(&enic->wq_lock[q_number]);
351
352 vnic_wq_service(&enic->wq[q_number], cq_desc,
353 completed_index, enic_wq_free_buf,
354 opaque);
355
356 if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
357 vnic_wq_desc_avail(&enic->wq[q_number]) >=
358 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
359 netif_wake_subqueue(enic->netdev, q_number);
360
361 spin_unlock(&enic->wq_lock[q_number]);
362
363 return 0;
364}
365
366static bool enic_log_q_error(struct enic *enic)
367{
368 unsigned int i;
369 u32 error_status;
370 bool err = false;
371
372 for (i = 0; i < enic->wq_count; i++) {
373 error_status = vnic_wq_error_status(&enic->wq[i]);
374 err |= error_status;
375 if (error_status)
376 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
377 i, error_status);
378 }
379
380 for (i = 0; i < enic->rq_count; i++) {
381 error_status = vnic_rq_error_status(&enic->rq[i]);
382 err |= error_status;
383 if (error_status)
384 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
385 i, error_status);
386 }
387
388 return err;
389}
390
391static void enic_msglvl_check(struct enic *enic)
392{
393 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
394
395 if (msg_enable != enic->msg_enable) {
396 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
397 enic->msg_enable, msg_enable);
398 enic->msg_enable = msg_enable;
399 }
400}
401
402static void enic_mtu_check(struct enic *enic)
403{
404 u32 mtu = vnic_dev_mtu(enic->vdev);
405 struct net_device *netdev = enic->netdev;
406
407 if (mtu && mtu != enic->port_mtu) {
408 enic->port_mtu = mtu;
409 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
410 mtu = max_t(int, ENIC_MIN_MTU,
411 min_t(int, ENIC_MAX_MTU, mtu));
412 if (mtu != netdev->mtu)
413 schedule_work(&enic->change_mtu_work);
414 } else {
415 if (mtu < netdev->mtu)
416 netdev_warn(netdev,
417 "interface MTU (%d) set higher "
418 "than switch port MTU (%d)\n",
419 netdev->mtu, mtu);
420 }
421 }
422}
423
424static void enic_link_check(struct enic *enic)
425{
426 int link_status = vnic_dev_link_status(enic->vdev);
427 int carrier_ok = netif_carrier_ok(enic->netdev);
428
429 if (link_status && !carrier_ok) {
430 netdev_info(enic->netdev, "Link UP\n");
431 netif_carrier_on(enic->netdev);
432 } else if (!link_status && carrier_ok) {
433 netdev_info(enic->netdev, "Link DOWN\n");
434 netif_carrier_off(enic->netdev);
435 }
436}
437
438static void enic_notify_check(struct enic *enic)
439{
440 enic_msglvl_check(enic);
441 enic_mtu_check(enic);
442 enic_link_check(enic);
443}
444
445#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
446
447static irqreturn_t enic_isr_legacy(int irq, void *data)
448{
449 struct net_device *netdev = data;
450 struct enic *enic = netdev_priv(netdev);
451 unsigned int io_intr = ENIC_LEGACY_IO_INTR;
452 unsigned int err_intr = ENIC_LEGACY_ERR_INTR;
453 unsigned int notify_intr = ENIC_LEGACY_NOTIFY_INTR;
454 u32 pba;
455
456 vnic_intr_mask(&enic->intr[io_intr]);
457
458 pba = vnic_intr_legacy_pba(enic->legacy_pba);
459 if (!pba) {
460 vnic_intr_unmask(&enic->intr[io_intr]);
461 return IRQ_NONE; /* not our interrupt */
462 }
463
464 if (ENIC_TEST_INTR(pba, notify_intr)) {
465 enic_notify_check(enic);
466 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
467 }
468
469 if (ENIC_TEST_INTR(pba, err_intr)) {
470 vnic_intr_return_all_credits(&enic->intr[err_intr]);
471 enic_log_q_error(enic);
472 /* schedule recovery from WQ/RQ error */
473 schedule_work(&enic->reset);
474 return IRQ_HANDLED;
475 }
476
477 if (ENIC_TEST_INTR(pba, io_intr))
478 napi_schedule_irqoff(&enic->napi[0]);
479 else
480 vnic_intr_unmask(&enic->intr[io_intr]);
481
482 return IRQ_HANDLED;
483}
484
485static irqreturn_t enic_isr_msi(int irq, void *data)
486{
487 struct enic *enic = data;
488
489 /* With MSI, there is no sharing of interrupts, so this is
490 * our interrupt and there is no need to ack it. The device
491 * is not providing per-vector masking, so the OS will not
492 * write to PCI config space to mask/unmask the interrupt.
493 * We're using mask_on_assertion for MSI, so the device
494 * automatically masks the interrupt when the interrupt is
495 * generated. Later, when exiting polling, the interrupt
496 * will be unmasked (see enic_poll).
497 *
498 * Also, the device uses the same PCIe Traffic Class (TC)
499 * for Memory Write data and MSI, so there are no ordering
500 * issues; the MSI will always arrive at the Root Complex
501 * _after_ corresponding Memory Writes (i.e. descriptor
502 * writes).
503 */
504
505 napi_schedule_irqoff(&enic->napi[0]);
506
507 return IRQ_HANDLED;
508}
509
510static irqreturn_t enic_isr_msix(int irq, void *data)
511{
512 struct napi_struct *napi = data;
513
514 napi_schedule_irqoff(napi);
515
516 return IRQ_HANDLED;
517}
518
519static irqreturn_t enic_isr_msix_err(int irq, void *data)
520{
521 struct enic *enic = data;
522 unsigned int intr = enic_msix_err_intr(enic);
523
524 vnic_intr_return_all_credits(&enic->intr[intr]);
525
526 if (enic_log_q_error(enic))
527 /* schedule recovery from WQ/RQ error */
528 schedule_work(&enic->reset);
529
530 return IRQ_HANDLED;
531}
532
533static irqreturn_t enic_isr_msix_notify(int irq, void *data)
534{
535 struct enic *enic = data;
536 unsigned int intr = enic_msix_notify_intr(enic);
537
538 enic_notify_check(enic);
539 vnic_intr_return_all_credits(&enic->intr[intr]);
540
541 return IRQ_HANDLED;
542}
543
544static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq,
545 struct sk_buff *skb, unsigned int len_left,
546 int loopback)
547{
548 const skb_frag_t *frag;
549 dma_addr_t dma_addr;
550
551 /* Queue additional data fragments */
552 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
553 len_left -= skb_frag_size(frag);
554 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0,
555 skb_frag_size(frag),
556 DMA_TO_DEVICE);
557 if (unlikely(enic_dma_map_check(enic, dma_addr)))
558 return -ENOMEM;
559 enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag),
560 (len_left == 0), /* EOP? */
561 loopback);
562 }
563
564 return 0;
565}
566
567static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
568 struct sk_buff *skb, int vlan_tag_insert,
569 unsigned int vlan_tag, int loopback)
570{
571 unsigned int head_len = skb_headlen(skb);
572 unsigned int len_left = skb->len - head_len;
573 int eop = (len_left == 0);
574 dma_addr_t dma_addr;
575 int err = 0;
576
577 dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
578 DMA_TO_DEVICE);
579 if (unlikely(enic_dma_map_check(enic, dma_addr)))
580 return -ENOMEM;
581
582 /* Queue the main skb fragment. The fragments are no larger
583 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
584 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
585 * per fragment is queued.
586 */
587 enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert,
588 vlan_tag, eop, loopback);
589
590 if (!eop)
591 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
592
593 return err;
594}
595
596static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
597 struct sk_buff *skb, int vlan_tag_insert,
598 unsigned int vlan_tag, int loopback)
599{
600 unsigned int head_len = skb_headlen(skb);
601 unsigned int len_left = skb->len - head_len;
602 unsigned int hdr_len = skb_checksum_start_offset(skb);
603 unsigned int csum_offset = hdr_len + skb->csum_offset;
604 int eop = (len_left == 0);
605 dma_addr_t dma_addr;
606 int err = 0;
607
608 dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
609 DMA_TO_DEVICE);
610 if (unlikely(enic_dma_map_check(enic, dma_addr)))
611 return -ENOMEM;
612
613 /* Queue the main skb fragment. The fragments are no larger
614 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
615 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
616 * per fragment is queued.
617 */
618 enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset,
619 hdr_len, vlan_tag_insert, vlan_tag, eop,
620 loopback);
621
622 if (!eop)
623 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
624
625 return err;
626}
627
628static void enic_preload_tcp_csum_encap(struct sk_buff *skb)
629{
630 const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
631
632 switch (eth->h_proto) {
633 case ntohs(ETH_P_IP):
634 inner_ip_hdr(skb)->check = 0;
635 inner_tcp_hdr(skb)->check =
636 ~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr,
637 inner_ip_hdr(skb)->daddr, 0,
638 IPPROTO_TCP, 0);
639 break;
640 case ntohs(ETH_P_IPV6):
641 inner_tcp_hdr(skb)->check =
642 ~csum_ipv6_magic(&inner_ipv6_hdr(skb)->saddr,
643 &inner_ipv6_hdr(skb)->daddr, 0,
644 IPPROTO_TCP, 0);
645 break;
646 default:
647 WARN_ONCE(1, "Non ipv4/ipv6 inner pkt for encap offload");
648 break;
649 }
650}
651
652static void enic_preload_tcp_csum(struct sk_buff *skb)
653{
654 /* Preload TCP csum field with IP pseudo hdr calculated
655 * with IP length set to zero. HW will later add in length
656 * to each TCP segment resulting from the TSO.
657 */
658
659 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
660 ip_hdr(skb)->check = 0;
661 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
662 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
663 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
664 tcp_v6_gso_csum_prep(skb);
665 }
666}
667
668static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
669 struct sk_buff *skb, unsigned int mss,
670 int vlan_tag_insert, unsigned int vlan_tag,
671 int loopback)
672{
673 unsigned int frag_len_left = skb_headlen(skb);
674 unsigned int len_left = skb->len - frag_len_left;
675 int eop = (len_left == 0);
676 unsigned int offset = 0;
677 unsigned int hdr_len;
678 dma_addr_t dma_addr;
679 unsigned int len;
680 skb_frag_t *frag;
681
682 if (skb->encapsulation) {
683 hdr_len = skb_inner_tcp_all_headers(skb);
684 enic_preload_tcp_csum_encap(skb);
685 } else {
686 hdr_len = skb_tcp_all_headers(skb);
687 enic_preload_tcp_csum(skb);
688 }
689
690 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
691 * for the main skb fragment
692 */
693 while (frag_len_left) {
694 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
695 dma_addr = dma_map_single(&enic->pdev->dev,
696 skb->data + offset, len,
697 DMA_TO_DEVICE);
698 if (unlikely(enic_dma_map_check(enic, dma_addr)))
699 return -ENOMEM;
700 enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len,
701 vlan_tag_insert, vlan_tag,
702 eop && (len == frag_len_left), loopback);
703 frag_len_left -= len;
704 offset += len;
705 }
706
707 if (eop)
708 return 0;
709
710 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
711 * for additional data fragments
712 */
713 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
714 len_left -= skb_frag_size(frag);
715 frag_len_left = skb_frag_size(frag);
716 offset = 0;
717
718 while (frag_len_left) {
719 len = min(frag_len_left,
720 (unsigned int)WQ_ENET_MAX_DESC_LEN);
721 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
722 offset, len,
723 DMA_TO_DEVICE);
724 if (unlikely(enic_dma_map_check(enic, dma_addr)))
725 return -ENOMEM;
726 enic_queue_wq_desc_cont(wq, skb, dma_addr, len,
727 (len_left == 0) &&
728 (len == frag_len_left),/*EOP*/
729 loopback);
730 frag_len_left -= len;
731 offset += len;
732 }
733 }
734
735 return 0;
736}
737
738static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq,
739 struct sk_buff *skb,
740 int vlan_tag_insert,
741 unsigned int vlan_tag, int loopback)
742{
743 unsigned int head_len = skb_headlen(skb);
744 unsigned int len_left = skb->len - head_len;
745 /* Hardware will overwrite the checksum fields, calculating from
746 * scratch and ignoring the value placed by software.
747 * Offload mode = 00
748 * mss[2], mss[1], mss[0] bits are set
749 */
750 unsigned int mss_or_csum = 7;
751 int eop = (len_left == 0);
752 dma_addr_t dma_addr;
753 int err = 0;
754
755 dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
756 DMA_TO_DEVICE);
757 if (unlikely(enic_dma_map_check(enic, dma_addr)))
758 return -ENOMEM;
759
760 enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0,
761 vlan_tag_insert, vlan_tag,
762 WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop,
763 loopback);
764 if (!eop)
765 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
766
767 return err;
768}
769
770static inline int enic_queue_wq_skb(struct enic *enic,
771 struct vnic_wq *wq, struct sk_buff *skb)
772{
773 unsigned int mss = skb_shinfo(skb)->gso_size;
774 unsigned int vlan_tag = 0;
775 int vlan_tag_insert = 0;
776 int loopback = 0;
777 int err;
778
779 if (skb_vlan_tag_present(skb)) {
780 /* VLAN tag from trunking driver */
781 vlan_tag_insert = 1;
782 vlan_tag = skb_vlan_tag_get(skb);
783 } else if (enic->loop_enable) {
784 vlan_tag = enic->loop_tag;
785 loopback = 1;
786 }
787
788 if (mss)
789 err = enic_queue_wq_skb_tso(enic, wq, skb, mss,
790 vlan_tag_insert, vlan_tag,
791 loopback);
792 else if (skb->encapsulation)
793 err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert,
794 vlan_tag, loopback);
795 else if (skb->ip_summed == CHECKSUM_PARTIAL)
796 err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
797 vlan_tag, loopback);
798 else
799 err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert,
800 vlan_tag, loopback);
801 if (unlikely(err)) {
802 struct vnic_wq_buf *buf;
803
804 buf = wq->to_use->prev;
805 /* while not EOP of previous pkt && queue not empty.
806 * For all non EOP bufs, os_buf is NULL.
807 */
808 while (!buf->os_buf && (buf->next != wq->to_clean)) {
809 enic_free_wq_buf(wq, buf);
810 wq->ring.desc_avail++;
811 buf = buf->prev;
812 }
813 wq->to_use = buf->next;
814 dev_kfree_skb(skb);
815 }
816 return err;
817}
818
819/* netif_tx_lock held, process context with BHs disabled, or BH */
820static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
821 struct net_device *netdev)
822{
823 struct enic *enic = netdev_priv(netdev);
824 struct vnic_wq *wq;
825 unsigned int txq_map;
826 struct netdev_queue *txq;
827
828 if (skb->len <= 0) {
829 dev_kfree_skb_any(skb);
830 return NETDEV_TX_OK;
831 }
832
833 txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
834 wq = &enic->wq[txq_map];
835 txq = netdev_get_tx_queue(netdev, txq_map);
836
837 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
838 * which is very likely. In the off chance it's going to take
839 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
840 */
841
842 if (skb_shinfo(skb)->gso_size == 0 &&
843 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
844 skb_linearize(skb)) {
845 dev_kfree_skb_any(skb);
846 return NETDEV_TX_OK;
847 }
848
849 spin_lock(&enic->wq_lock[txq_map]);
850
851 if (vnic_wq_desc_avail(wq) <
852 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
853 netif_tx_stop_queue(txq);
854 /* This is a hard error, log it */
855 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
856 spin_unlock(&enic->wq_lock[txq_map]);
857 return NETDEV_TX_BUSY;
858 }
859
860 if (enic_queue_wq_skb(enic, wq, skb))
861 goto error;
862
863 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
864 netif_tx_stop_queue(txq);
865 skb_tx_timestamp(skb);
866 if (!netdev_xmit_more() || netif_xmit_stopped(txq))
867 vnic_wq_doorbell(wq);
868
869error:
870 spin_unlock(&enic->wq_lock[txq_map]);
871
872 return NETDEV_TX_OK;
873}
874
875/* dev_base_lock rwlock held, nominally process context */
876static void enic_get_stats(struct net_device *netdev,
877 struct rtnl_link_stats64 *net_stats)
878{
879 struct enic *enic = netdev_priv(netdev);
880 struct vnic_stats *stats;
881 int err;
882
883 err = enic_dev_stats_dump(enic, &stats);
884 /* return only when dma_alloc_coherent fails in vnic_dev_stats_dump
885 * For other failures, like devcmd failure, we return previously
886 * recorded stats.
887 */
888 if (err == -ENOMEM)
889 return;
890
891 net_stats->tx_packets = stats->tx.tx_frames_ok;
892 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
893 net_stats->tx_errors = stats->tx.tx_errors;
894 net_stats->tx_dropped = stats->tx.tx_drops;
895
896 net_stats->rx_packets = stats->rx.rx_frames_ok;
897 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
898 net_stats->rx_errors = stats->rx.rx_errors;
899 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
900 net_stats->rx_over_errors = enic->rq_truncated_pkts;
901 net_stats->rx_crc_errors = enic->rq_bad_fcs;
902 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
903}
904
905static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
906{
907 struct enic *enic = netdev_priv(netdev);
908
909 if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
910 unsigned int mc_count = netdev_mc_count(netdev);
911
912 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
913 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
914
915 return -ENOSPC;
916 }
917
918 enic_dev_add_addr(enic, mc_addr);
919 enic->mc_count++;
920
921 return 0;
922}
923
924static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
925{
926 struct enic *enic = netdev_priv(netdev);
927
928 enic_dev_del_addr(enic, mc_addr);
929 enic->mc_count--;
930
931 return 0;
932}
933
934static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
935{
936 struct enic *enic = netdev_priv(netdev);
937
938 if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
939 unsigned int uc_count = netdev_uc_count(netdev);
940
941 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
942 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
943
944 return -ENOSPC;
945 }
946
947 enic_dev_add_addr(enic, uc_addr);
948 enic->uc_count++;
949
950 return 0;
951}
952
953static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
954{
955 struct enic *enic = netdev_priv(netdev);
956
957 enic_dev_del_addr(enic, uc_addr);
958 enic->uc_count--;
959
960 return 0;
961}
962
963void enic_reset_addr_lists(struct enic *enic)
964{
965 struct net_device *netdev = enic->netdev;
966
967 __dev_uc_unsync(netdev, NULL);
968 __dev_mc_unsync(netdev, NULL);
969
970 enic->mc_count = 0;
971 enic->uc_count = 0;
972 enic->flags = 0;
973}
974
975static int enic_set_mac_addr(struct net_device *netdev, char *addr)
976{
977 struct enic *enic = netdev_priv(netdev);
978
979 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
980 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
981 return -EADDRNOTAVAIL;
982 } else {
983 if (!is_valid_ether_addr(addr))
984 return -EADDRNOTAVAIL;
985 }
986
987 eth_hw_addr_set(netdev, addr);
988
989 return 0;
990}
991
992static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
993{
994 struct enic *enic = netdev_priv(netdev);
995 struct sockaddr *saddr = p;
996 char *addr = saddr->sa_data;
997 int err;
998
999 if (netif_running(enic->netdev)) {
1000 err = enic_dev_del_station_addr(enic);
1001 if (err)
1002 return err;
1003 }
1004
1005 err = enic_set_mac_addr(netdev, addr);
1006 if (err)
1007 return err;
1008
1009 if (netif_running(enic->netdev)) {
1010 err = enic_dev_add_station_addr(enic);
1011 if (err)
1012 return err;
1013 }
1014
1015 return err;
1016}
1017
1018static int enic_set_mac_address(struct net_device *netdev, void *p)
1019{
1020 struct sockaddr *saddr = p;
1021 char *addr = saddr->sa_data;
1022 struct enic *enic = netdev_priv(netdev);
1023 int err;
1024
1025 err = enic_dev_del_station_addr(enic);
1026 if (err)
1027 return err;
1028
1029 err = enic_set_mac_addr(netdev, addr);
1030 if (err)
1031 return err;
1032
1033 return enic_dev_add_station_addr(enic);
1034}
1035
1036/* netif_tx_lock held, BHs disabled */
1037static void enic_set_rx_mode(struct net_device *netdev)
1038{
1039 struct enic *enic = netdev_priv(netdev);
1040 int directed = 1;
1041 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1042 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1043 int promisc = (netdev->flags & IFF_PROMISC) ||
1044 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1045 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1046 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1047 unsigned int flags = netdev->flags |
1048 (allmulti ? IFF_ALLMULTI : 0) |
1049 (promisc ? IFF_PROMISC : 0);
1050
1051 if (enic->flags != flags) {
1052 enic->flags = flags;
1053 enic_dev_packet_filter(enic, directed,
1054 multicast, broadcast, promisc, allmulti);
1055 }
1056
1057 if (!promisc) {
1058 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
1059 if (!allmulti)
1060 __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
1061 }
1062}
1063
1064/* netif_tx_lock held, BHs disabled */
1065static void enic_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1066{
1067 struct enic *enic = netdev_priv(netdev);
1068 schedule_work(&enic->tx_hang_reset);
1069}
1070
1071static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1072{
1073 struct enic *enic = netdev_priv(netdev);
1074 struct enic_port_profile *pp;
1075 int err;
1076
1077 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1078 if (err)
1079 return err;
1080
1081 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1082 if (vf == PORT_SELF_VF) {
1083 memcpy(pp->vf_mac, mac, ETH_ALEN);
1084 return 0;
1085 } else {
1086 /*
1087 * For sriov vf's set the mac in hw
1088 */
1089 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1090 vnic_dev_set_mac_addr, mac);
1091 return enic_dev_status_to_errno(err);
1092 }
1093 } else
1094 return -EINVAL;
1095}
1096
1097static int enic_set_vf_port(struct net_device *netdev, int vf,
1098 struct nlattr *port[])
1099{
1100 static const u8 zero_addr[ETH_ALEN] = {};
1101 struct enic *enic = netdev_priv(netdev);
1102 struct enic_port_profile prev_pp;
1103 struct enic_port_profile *pp;
1104 int err = 0, restore_pp = 1;
1105
1106 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1107 if (err)
1108 return err;
1109
1110 if (!port[IFLA_PORT_REQUEST])
1111 return -EOPNOTSUPP;
1112
1113 memcpy(&prev_pp, pp, sizeof(*enic->pp));
1114 memset(pp, 0, sizeof(*enic->pp));
1115
1116 pp->set |= ENIC_SET_REQUEST;
1117 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1118
1119 if (port[IFLA_PORT_PROFILE]) {
1120 pp->set |= ENIC_SET_NAME;
1121 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1122 PORT_PROFILE_MAX);
1123 }
1124
1125 if (port[IFLA_PORT_INSTANCE_UUID]) {
1126 pp->set |= ENIC_SET_INSTANCE;
1127 memcpy(pp->instance_uuid,
1128 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1129 }
1130
1131 if (port[IFLA_PORT_HOST_UUID]) {
1132 pp->set |= ENIC_SET_HOST;
1133 memcpy(pp->host_uuid,
1134 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1135 }
1136
1137 if (vf == PORT_SELF_VF) {
1138 /* Special case handling: mac came from IFLA_VF_MAC */
1139 if (!is_zero_ether_addr(prev_pp.vf_mac))
1140 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1141
1142 if (is_zero_ether_addr(netdev->dev_addr))
1143 eth_hw_addr_random(netdev);
1144 } else {
1145 /* SR-IOV VF: get mac from adapter */
1146 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1147 vnic_dev_get_mac_addr, pp->mac_addr);
1148 if (err) {
1149 netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1150 memcpy(pp, &prev_pp, sizeof(*pp));
1151 return enic_dev_status_to_errno(err);
1152 }
1153 }
1154
1155 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1156 if (err) {
1157 if (restore_pp) {
1158 /* Things are still the way they were: Implicit
1159 * DISASSOCIATE failed
1160 */
1161 memcpy(pp, &prev_pp, sizeof(*pp));
1162 } else {
1163 memset(pp, 0, sizeof(*pp));
1164 if (vf == PORT_SELF_VF)
1165 eth_hw_addr_set(netdev, zero_addr);
1166 }
1167 } else {
1168 /* Set flag to indicate that the port assoc/disassoc
1169 * request has been sent out to fw
1170 */
1171 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1172
1173 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1174 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1175 eth_zero_addr(pp->mac_addr);
1176 if (vf == PORT_SELF_VF)
1177 eth_hw_addr_set(netdev, zero_addr);
1178 }
1179 }
1180
1181 if (vf == PORT_SELF_VF)
1182 eth_zero_addr(pp->vf_mac);
1183
1184 return err;
1185}
1186
1187static int enic_get_vf_port(struct net_device *netdev, int vf,
1188 struct sk_buff *skb)
1189{
1190 struct enic *enic = netdev_priv(netdev);
1191 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1192 struct enic_port_profile *pp;
1193 int err;
1194
1195 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1196 if (err)
1197 return err;
1198
1199 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1200 return -ENODATA;
1201
1202 err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1203 if (err)
1204 return err;
1205
1206 if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
1207 nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
1208 ((pp->set & ENIC_SET_NAME) &&
1209 nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
1210 ((pp->set & ENIC_SET_INSTANCE) &&
1211 nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1212 pp->instance_uuid)) ||
1213 ((pp->set & ENIC_SET_HOST) &&
1214 nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
1215 goto nla_put_failure;
1216 return 0;
1217
1218nla_put_failure:
1219 return -EMSGSIZE;
1220}
1221
1222static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1223{
1224 struct enic *enic = vnic_dev_priv(rq->vdev);
1225
1226 if (!buf->os_buf)
1227 return;
1228
1229 dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
1230 DMA_FROM_DEVICE);
1231 dev_kfree_skb_any(buf->os_buf);
1232 buf->os_buf = NULL;
1233}
1234
1235static int enic_rq_alloc_buf(struct vnic_rq *rq)
1236{
1237 struct enic *enic = vnic_dev_priv(rq->vdev);
1238 struct net_device *netdev = enic->netdev;
1239 struct sk_buff *skb;
1240 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1241 unsigned int os_buf_index = 0;
1242 dma_addr_t dma_addr;
1243 struct vnic_rq_buf *buf = rq->to_use;
1244
1245 if (buf->os_buf) {
1246 enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr,
1247 buf->len);
1248
1249 return 0;
1250 }
1251 skb = netdev_alloc_skb_ip_align(netdev, len);
1252 if (!skb)
1253 return -ENOMEM;
1254
1255 dma_addr = dma_map_single(&enic->pdev->dev, skb->data, len,
1256 DMA_FROM_DEVICE);
1257 if (unlikely(enic_dma_map_check(enic, dma_addr))) {
1258 dev_kfree_skb(skb);
1259 return -ENOMEM;
1260 }
1261
1262 enic_queue_rq_desc(rq, skb, os_buf_index,
1263 dma_addr, len);
1264
1265 return 0;
1266}
1267
1268static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
1269 u32 pkt_len)
1270{
1271 if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
1272 pkt_size->large_pkt_bytes_cnt += pkt_len;
1273 else
1274 pkt_size->small_pkt_bytes_cnt += pkt_len;
1275}
1276
1277static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
1278 struct vnic_rq_buf *buf, u16 len)
1279{
1280 struct enic *enic = netdev_priv(netdev);
1281 struct sk_buff *new_skb;
1282
1283 if (len > enic->rx_copybreak)
1284 return false;
1285 new_skb = netdev_alloc_skb_ip_align(netdev, len);
1286 if (!new_skb)
1287 return false;
1288 dma_sync_single_for_cpu(&enic->pdev->dev, buf->dma_addr, len,
1289 DMA_FROM_DEVICE);
1290 memcpy(new_skb->data, (*skb)->data, len);
1291 *skb = new_skb;
1292
1293 return true;
1294}
1295
1296static void enic_rq_indicate_buf(struct vnic_rq *rq,
1297 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1298 int skipped, void *opaque)
1299{
1300 struct enic *enic = vnic_dev_priv(rq->vdev);
1301 struct net_device *netdev = enic->netdev;
1302 struct sk_buff *skb;
1303 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1304
1305 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1306 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1307 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1308 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1309 u8 packet_error;
1310 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1311 u32 rss_hash;
1312 bool outer_csum_ok = true, encap = false;
1313
1314 if (skipped)
1315 return;
1316
1317 skb = buf->os_buf;
1318
1319 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1320 &type, &color, &q_number, &completed_index,
1321 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1322 &csum_not_calc, &rss_hash, &bytes_written,
1323 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1324 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1325 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1326 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1327 &fcs_ok);
1328
1329 if (packet_error) {
1330
1331 if (!fcs_ok) {
1332 if (bytes_written > 0)
1333 enic->rq_bad_fcs++;
1334 else if (bytes_written == 0)
1335 enic->rq_truncated_pkts++;
1336 }
1337
1338 dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
1339 DMA_FROM_DEVICE);
1340 dev_kfree_skb_any(skb);
1341 buf->os_buf = NULL;
1342
1343 return;
1344 }
1345
1346 if (eop && bytes_written > 0) {
1347
1348 /* Good receive
1349 */
1350
1351 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
1352 buf->os_buf = NULL;
1353 dma_unmap_single(&enic->pdev->dev, buf->dma_addr,
1354 buf->len, DMA_FROM_DEVICE);
1355 }
1356 prefetch(skb->data - NET_IP_ALIGN);
1357
1358 skb_put(skb, bytes_written);
1359 skb->protocol = eth_type_trans(skb, netdev);
1360 skb_record_rx_queue(skb, q_number);
1361 if ((netdev->features & NETIF_F_RXHASH) && rss_hash &&
1362 (type == 3)) {
1363 switch (rss_type) {
1364 case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4:
1365 case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6:
1366 case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX:
1367 skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4);
1368 break;
1369 case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4:
1370 case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6:
1371 case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX:
1372 skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3);
1373 break;
1374 }
1375 }
1376 if (enic->vxlan.vxlan_udp_port_number) {
1377 switch (enic->vxlan.patch_level) {
1378 case 0:
1379 if (fcoe) {
1380 encap = true;
1381 outer_csum_ok = fcoe_fc_crc_ok;
1382 }
1383 break;
1384 case 2:
1385 if ((type == 7) &&
1386 (rss_hash & BIT(0))) {
1387 encap = true;
1388 outer_csum_ok = (rss_hash & BIT(1)) &&
1389 (rss_hash & BIT(2));
1390 }
1391 break;
1392 }
1393 }
1394
1395 /* Hardware does not provide whole packet checksum. It only
1396 * provides pseudo checksum. Since hw validates the packet
1397 * checksum but not provide us the checksum value. use
1398 * CHECSUM_UNNECESSARY.
1399 *
1400 * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is
1401 * inner csum_ok. outer_csum_ok is set by hw when outer udp
1402 * csum is correct or is zero.
1403 */
1404 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc &&
1405 tcp_udp_csum_ok && outer_csum_ok &&
1406 (ipv4_csum_ok || ipv6)) {
1407 skb->ip_summed = CHECKSUM_UNNECESSARY;
1408 skb->csum_level = encap;
1409 }
1410
1411 if (vlan_stripped)
1412 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1413
1414 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1415 if (!(netdev->features & NETIF_F_GRO))
1416 netif_receive_skb(skb);
1417 else
1418 napi_gro_receive(&enic->napi[q_number], skb);
1419 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1420 enic_intr_update_pkt_size(&cq->pkt_size_counter,
1421 bytes_written);
1422 } else {
1423
1424 /* Buffer overflow
1425 */
1426
1427 dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
1428 DMA_FROM_DEVICE);
1429 dev_kfree_skb_any(skb);
1430 buf->os_buf = NULL;
1431 }
1432}
1433
1434static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1435 u8 type, u16 q_number, u16 completed_index, void *opaque)
1436{
1437 struct enic *enic = vnic_dev_priv(vdev);
1438
1439 vnic_rq_service(&enic->rq[q_number], cq_desc,
1440 completed_index, VNIC_RQ_RETURN_DESC,
1441 enic_rq_indicate_buf, opaque);
1442
1443 return 0;
1444}
1445
1446static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1447{
1448 unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1449 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1450 u32 timer = cq->tobe_rx_coal_timeval;
1451
1452 if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1453 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1454 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1455 }
1456}
1457
1458static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1459{
1460 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1461 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1462 struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1463 int index;
1464 u32 timer;
1465 u32 range_start;
1466 u32 traffic;
1467 u64 delta;
1468 ktime_t now = ktime_get();
1469
1470 delta = ktime_us_delta(now, cq->prev_ts);
1471 if (delta < ENIC_AIC_TS_BREAK)
1472 return;
1473 cq->prev_ts = now;
1474
1475 traffic = pkt_size_counter->large_pkt_bytes_cnt +
1476 pkt_size_counter->small_pkt_bytes_cnt;
1477 /* The table takes Mbps
1478 * traffic *= 8 => bits
1479 * traffic *= (10^6 / delta) => bps
1480 * traffic /= 10^6 => Mbps
1481 *
1482 * Combining, traffic *= (8 / delta)
1483 */
1484
1485 traffic <<= 3;
1486 traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
1487
1488 for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1489 if (traffic < mod_table[index].rx_rate)
1490 break;
1491 range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1492 pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1493 rx_coal->small_pkt_range_start :
1494 rx_coal->large_pkt_range_start;
1495 timer = range_start + ((rx_coal->range_end - range_start) *
1496 mod_table[index].range_percent / 100);
1497 /* Damping */
1498 cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1499
1500 pkt_size_counter->large_pkt_bytes_cnt = 0;
1501 pkt_size_counter->small_pkt_bytes_cnt = 0;
1502}
1503
1504static int enic_poll(struct napi_struct *napi, int budget)
1505{
1506 struct net_device *netdev = napi->dev;
1507 struct enic *enic = netdev_priv(netdev);
1508 unsigned int cq_rq = enic_cq_rq(enic, 0);
1509 unsigned int cq_wq = enic_cq_wq(enic, 0);
1510 unsigned int intr = ENIC_LEGACY_IO_INTR;
1511 unsigned int rq_work_to_do = budget;
1512 unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
1513 unsigned int work_done, rq_work_done = 0, wq_work_done;
1514 int err;
1515
1516 wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1517 enic_wq_service, NULL);
1518
1519 if (budget > 0)
1520 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1521 rq_work_to_do, enic_rq_service, NULL);
1522
1523 /* Accumulate intr event credits for this polling
1524 * cycle. An intr event is the completion of a
1525 * a WQ or RQ packet.
1526 */
1527
1528 work_done = rq_work_done + wq_work_done;
1529
1530 if (work_done > 0)
1531 vnic_intr_return_credits(&enic->intr[intr],
1532 work_done,
1533 0 /* don't unmask intr */,
1534 0 /* don't reset intr timer */);
1535
1536 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1537
1538 /* Buffer allocation failed. Stay in polling
1539 * mode so we can try to fill the ring again.
1540 */
1541
1542 if (err)
1543 rq_work_done = rq_work_to_do;
1544 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1545 /* Call the function which refreshes the intr coalescing timer
1546 * value based on the traffic.
1547 */
1548 enic_calc_int_moderation(enic, &enic->rq[0]);
1549
1550 if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) {
1551
1552 /* Some work done, but not enough to stay in polling,
1553 * exit polling
1554 */
1555
1556 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1557 enic_set_int_moderation(enic, &enic->rq[0]);
1558 vnic_intr_unmask(&enic->intr[intr]);
1559 }
1560
1561 return rq_work_done;
1562}
1563
1564#ifdef CONFIG_RFS_ACCEL
1565static void enic_free_rx_cpu_rmap(struct enic *enic)
1566{
1567 free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1568 enic->netdev->rx_cpu_rmap = NULL;
1569}
1570
1571static void enic_set_rx_cpu_rmap(struct enic *enic)
1572{
1573 int i, res;
1574
1575 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1576 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1577 if (unlikely(!enic->netdev->rx_cpu_rmap))
1578 return;
1579 for (i = 0; i < enic->rq_count; i++) {
1580 res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1581 enic->msix_entry[i].vector);
1582 if (unlikely(res)) {
1583 enic_free_rx_cpu_rmap(enic);
1584 return;
1585 }
1586 }
1587 }
1588}
1589
1590#else
1591
1592static void enic_free_rx_cpu_rmap(struct enic *enic)
1593{
1594}
1595
1596static void enic_set_rx_cpu_rmap(struct enic *enic)
1597{
1598}
1599
1600#endif /* CONFIG_RFS_ACCEL */
1601
1602static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1603{
1604 struct net_device *netdev = napi->dev;
1605 struct enic *enic = netdev_priv(netdev);
1606 unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1607 struct vnic_wq *wq = &enic->wq[wq_index];
1608 unsigned int cq;
1609 unsigned int intr;
1610 unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET;
1611 unsigned int wq_work_done;
1612 unsigned int wq_irq;
1613
1614 wq_irq = wq->index;
1615 cq = enic_cq_wq(enic, wq_irq);
1616 intr = enic_msix_wq_intr(enic, wq_irq);
1617 wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1618 enic_wq_service, NULL);
1619
1620 vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1621 0 /* don't unmask intr */,
1622 1 /* reset intr timer */);
1623 if (!wq_work_done) {
1624 napi_complete(napi);
1625 vnic_intr_unmask(&enic->intr[intr]);
1626 return 0;
1627 }
1628
1629 return budget;
1630}
1631
1632static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
1633{
1634 struct net_device *netdev = napi->dev;
1635 struct enic *enic = netdev_priv(netdev);
1636 unsigned int rq = (napi - &enic->napi[0]);
1637 unsigned int cq = enic_cq_rq(enic, rq);
1638 unsigned int intr = enic_msix_rq_intr(enic, rq);
1639 unsigned int work_to_do = budget;
1640 unsigned int work_done = 0;
1641 int err;
1642
1643 /* Service RQ
1644 */
1645
1646 if (budget > 0)
1647 work_done = vnic_cq_service(&enic->cq[cq],
1648 work_to_do, enic_rq_service, NULL);
1649
1650 /* Return intr event credits for this polling
1651 * cycle. An intr event is the completion of a
1652 * RQ packet.
1653 */
1654
1655 if (work_done > 0)
1656 vnic_intr_return_credits(&enic->intr[intr],
1657 work_done,
1658 0 /* don't unmask intr */,
1659 0 /* don't reset intr timer */);
1660
1661 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1662
1663 /* Buffer allocation failed. Stay in polling mode
1664 * so we can try to fill the ring again.
1665 */
1666
1667 if (err)
1668 work_done = work_to_do;
1669 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1670 /* Call the function which refreshes the intr coalescing timer
1671 * value based on the traffic.
1672 */
1673 enic_calc_int_moderation(enic, &enic->rq[rq]);
1674
1675 if ((work_done < budget) && napi_complete_done(napi, work_done)) {
1676
1677 /* Some work done, but not enough to stay in polling,
1678 * exit polling
1679 */
1680
1681 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1682 enic_set_int_moderation(enic, &enic->rq[rq]);
1683 vnic_intr_unmask(&enic->intr[intr]);
1684 }
1685
1686 return work_done;
1687}
1688
1689static void enic_notify_timer(struct timer_list *t)
1690{
1691 struct enic *enic = from_timer(enic, t, notify_timer);
1692
1693 enic_notify_check(enic);
1694
1695 mod_timer(&enic->notify_timer,
1696 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1697}
1698
1699static void enic_free_intr(struct enic *enic)
1700{
1701 struct net_device *netdev = enic->netdev;
1702 unsigned int i;
1703
1704 enic_free_rx_cpu_rmap(enic);
1705 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1706 case VNIC_DEV_INTR_MODE_INTX:
1707 free_irq(enic->pdev->irq, netdev);
1708 break;
1709 case VNIC_DEV_INTR_MODE_MSI:
1710 free_irq(enic->pdev->irq, enic);
1711 break;
1712 case VNIC_DEV_INTR_MODE_MSIX:
1713 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1714 if (enic->msix[i].requested)
1715 free_irq(enic->msix_entry[i].vector,
1716 enic->msix[i].devid);
1717 break;
1718 default:
1719 break;
1720 }
1721}
1722
1723static int enic_request_intr(struct enic *enic)
1724{
1725 struct net_device *netdev = enic->netdev;
1726 unsigned int i, intr;
1727 int err = 0;
1728
1729 enic_set_rx_cpu_rmap(enic);
1730 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1731
1732 case VNIC_DEV_INTR_MODE_INTX:
1733
1734 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1735 IRQF_SHARED, netdev->name, netdev);
1736 break;
1737
1738 case VNIC_DEV_INTR_MODE_MSI:
1739
1740 err = request_irq(enic->pdev->irq, enic_isr_msi,
1741 0, netdev->name, enic);
1742 break;
1743
1744 case VNIC_DEV_INTR_MODE_MSIX:
1745
1746 for (i = 0; i < enic->rq_count; i++) {
1747 intr = enic_msix_rq_intr(enic, i);
1748 snprintf(enic->msix[intr].devname,
1749 sizeof(enic->msix[intr].devname),
1750 "%s-rx-%u", netdev->name, i);
1751 enic->msix[intr].isr = enic_isr_msix;
1752 enic->msix[intr].devid = &enic->napi[i];
1753 }
1754
1755 for (i = 0; i < enic->wq_count; i++) {
1756 int wq = enic_cq_wq(enic, i);
1757
1758 intr = enic_msix_wq_intr(enic, i);
1759 snprintf(enic->msix[intr].devname,
1760 sizeof(enic->msix[intr].devname),
1761 "%s-tx-%u", netdev->name, i);
1762 enic->msix[intr].isr = enic_isr_msix;
1763 enic->msix[intr].devid = &enic->napi[wq];
1764 }
1765
1766 intr = enic_msix_err_intr(enic);
1767 snprintf(enic->msix[intr].devname,
1768 sizeof(enic->msix[intr].devname),
1769 "%s-err", netdev->name);
1770 enic->msix[intr].isr = enic_isr_msix_err;
1771 enic->msix[intr].devid = enic;
1772
1773 intr = enic_msix_notify_intr(enic);
1774 snprintf(enic->msix[intr].devname,
1775 sizeof(enic->msix[intr].devname),
1776 "%s-notify", netdev->name);
1777 enic->msix[intr].isr = enic_isr_msix_notify;
1778 enic->msix[intr].devid = enic;
1779
1780 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1781 enic->msix[i].requested = 0;
1782
1783 for (i = 0; i < enic->intr_count; i++) {
1784 err = request_irq(enic->msix_entry[i].vector,
1785 enic->msix[i].isr, 0,
1786 enic->msix[i].devname,
1787 enic->msix[i].devid);
1788 if (err) {
1789 enic_free_intr(enic);
1790 break;
1791 }
1792 enic->msix[i].requested = 1;
1793 }
1794
1795 break;
1796
1797 default:
1798 break;
1799 }
1800
1801 return err;
1802}
1803
1804static void enic_synchronize_irqs(struct enic *enic)
1805{
1806 unsigned int i;
1807
1808 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1809 case VNIC_DEV_INTR_MODE_INTX:
1810 case VNIC_DEV_INTR_MODE_MSI:
1811 synchronize_irq(enic->pdev->irq);
1812 break;
1813 case VNIC_DEV_INTR_MODE_MSIX:
1814 for (i = 0; i < enic->intr_count; i++)
1815 synchronize_irq(enic->msix_entry[i].vector);
1816 break;
1817 default:
1818 break;
1819 }
1820}
1821
1822static void enic_set_rx_coal_setting(struct enic *enic)
1823{
1824 unsigned int speed;
1825 int index = -1;
1826 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1827
1828 /* 1. Read the link speed from fw
1829 * 2. Pick the default range for the speed
1830 * 3. Update it in enic->rx_coalesce_setting
1831 */
1832 speed = vnic_dev_port_speed(enic->vdev);
1833 if (ENIC_LINK_SPEED_10G < speed)
1834 index = ENIC_LINK_40G_INDEX;
1835 else if (ENIC_LINK_SPEED_4G < speed)
1836 index = ENIC_LINK_10G_INDEX;
1837 else
1838 index = ENIC_LINK_4G_INDEX;
1839
1840 rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1841 rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1842 rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1843
1844 /* Start with the value provided by UCSM */
1845 for (index = 0; index < enic->rq_count; index++)
1846 enic->cq[index].cur_rx_coal_timeval =
1847 enic->config.intr_timer_usec;
1848
1849 rx_coal->use_adaptive_rx_coalesce = 1;
1850}
1851
1852static int enic_dev_notify_set(struct enic *enic)
1853{
1854 int err;
1855
1856 spin_lock_bh(&enic->devcmd_lock);
1857 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1858 case VNIC_DEV_INTR_MODE_INTX:
1859 err = vnic_dev_notify_set(enic->vdev, ENIC_LEGACY_NOTIFY_INTR);
1860 break;
1861 case VNIC_DEV_INTR_MODE_MSIX:
1862 err = vnic_dev_notify_set(enic->vdev,
1863 enic_msix_notify_intr(enic));
1864 break;
1865 default:
1866 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1867 break;
1868 }
1869 spin_unlock_bh(&enic->devcmd_lock);
1870
1871 return err;
1872}
1873
1874static void enic_notify_timer_start(struct enic *enic)
1875{
1876 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1877 case VNIC_DEV_INTR_MODE_MSI:
1878 mod_timer(&enic->notify_timer, jiffies);
1879 break;
1880 default:
1881 /* Using intr for notification for INTx/MSI-X */
1882 break;
1883 }
1884}
1885
1886/* rtnl lock is held, process context */
1887static int enic_open(struct net_device *netdev)
1888{
1889 struct enic *enic = netdev_priv(netdev);
1890 unsigned int i;
1891 int err, ret;
1892
1893 err = enic_request_intr(enic);
1894 if (err) {
1895 netdev_err(netdev, "Unable to request irq.\n");
1896 return err;
1897 }
1898 enic_init_affinity_hint(enic);
1899 enic_set_affinity_hint(enic);
1900
1901 err = enic_dev_notify_set(enic);
1902 if (err) {
1903 netdev_err(netdev,
1904 "Failed to alloc notify buffer, aborting.\n");
1905 goto err_out_free_intr;
1906 }
1907
1908 for (i = 0; i < enic->rq_count; i++) {
1909 /* enable rq before updating rq desc */
1910 vnic_rq_enable(&enic->rq[i]);
1911 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1912 /* Need at least one buffer on ring to get going */
1913 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1914 netdev_err(netdev, "Unable to alloc receive buffers\n");
1915 err = -ENOMEM;
1916 goto err_out_free_rq;
1917 }
1918 }
1919
1920 for (i = 0; i < enic->wq_count; i++)
1921 vnic_wq_enable(&enic->wq[i]);
1922
1923 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1924 enic_dev_add_station_addr(enic);
1925
1926 enic_set_rx_mode(netdev);
1927
1928 netif_tx_wake_all_queues(netdev);
1929
1930 for (i = 0; i < enic->rq_count; i++)
1931 napi_enable(&enic->napi[i]);
1932
1933 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1934 for (i = 0; i < enic->wq_count; i++)
1935 napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
1936 enic_dev_enable(enic);
1937
1938 for (i = 0; i < enic->intr_count; i++)
1939 vnic_intr_unmask(&enic->intr[i]);
1940
1941 enic_notify_timer_start(enic);
1942 enic_rfs_timer_start(enic);
1943
1944 return 0;
1945
1946err_out_free_rq:
1947 for (i = 0; i < enic->rq_count; i++) {
1948 ret = vnic_rq_disable(&enic->rq[i]);
1949 if (!ret)
1950 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1951 }
1952 enic_dev_notify_unset(enic);
1953err_out_free_intr:
1954 enic_unset_affinity_hint(enic);
1955 enic_free_intr(enic);
1956
1957 return err;
1958}
1959
1960/* rtnl lock is held, process context */
1961static int enic_stop(struct net_device *netdev)
1962{
1963 struct enic *enic = netdev_priv(netdev);
1964 unsigned int i;
1965 int err;
1966
1967 for (i = 0; i < enic->intr_count; i++) {
1968 vnic_intr_mask(&enic->intr[i]);
1969 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1970 }
1971
1972 enic_synchronize_irqs(enic);
1973
1974 del_timer_sync(&enic->notify_timer);
1975 enic_rfs_flw_tbl_free(enic);
1976
1977 enic_dev_disable(enic);
1978
1979 for (i = 0; i < enic->rq_count; i++)
1980 napi_disable(&enic->napi[i]);
1981
1982 netif_carrier_off(netdev);
1983 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1984 for (i = 0; i < enic->wq_count; i++)
1985 napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
1986 netif_tx_disable(netdev);
1987
1988 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1989 enic_dev_del_station_addr(enic);
1990
1991 for (i = 0; i < enic->wq_count; i++) {
1992 err = vnic_wq_disable(&enic->wq[i]);
1993 if (err)
1994 return err;
1995 }
1996 for (i = 0; i < enic->rq_count; i++) {
1997 err = vnic_rq_disable(&enic->rq[i]);
1998 if (err)
1999 return err;
2000 }
2001
2002 enic_dev_notify_unset(enic);
2003 enic_unset_affinity_hint(enic);
2004 enic_free_intr(enic);
2005
2006 for (i = 0; i < enic->wq_count; i++)
2007 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
2008 for (i = 0; i < enic->rq_count; i++)
2009 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
2010 for (i = 0; i < enic->cq_count; i++)
2011 vnic_cq_clean(&enic->cq[i]);
2012 for (i = 0; i < enic->intr_count; i++)
2013 vnic_intr_clean(&enic->intr[i]);
2014
2015 return 0;
2016}
2017
2018static int _enic_change_mtu(struct net_device *netdev, int new_mtu)
2019{
2020 bool running = netif_running(netdev);
2021 int err = 0;
2022
2023 ASSERT_RTNL();
2024 if (running) {
2025 err = enic_stop(netdev);
2026 if (err)
2027 return err;
2028 }
2029
2030 netdev->mtu = new_mtu;
2031
2032 if (running) {
2033 err = enic_open(netdev);
2034 if (err)
2035 return err;
2036 }
2037
2038 return 0;
2039}
2040
2041static int enic_change_mtu(struct net_device *netdev, int new_mtu)
2042{
2043 struct enic *enic = netdev_priv(netdev);
2044
2045 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2046 return -EOPNOTSUPP;
2047
2048 if (netdev->mtu > enic->port_mtu)
2049 netdev_warn(netdev,
2050 "interface MTU (%d) set higher than port MTU (%d)\n",
2051 netdev->mtu, enic->port_mtu);
2052
2053 return _enic_change_mtu(netdev, new_mtu);
2054}
2055
2056static void enic_change_mtu_work(struct work_struct *work)
2057{
2058 struct enic *enic = container_of(work, struct enic, change_mtu_work);
2059 struct net_device *netdev = enic->netdev;
2060 int new_mtu = vnic_dev_mtu(enic->vdev);
2061
2062 rtnl_lock();
2063 (void)_enic_change_mtu(netdev, new_mtu);
2064 rtnl_unlock();
2065
2066 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
2067}
2068
2069#ifdef CONFIG_NET_POLL_CONTROLLER
2070static void enic_poll_controller(struct net_device *netdev)
2071{
2072 struct enic *enic = netdev_priv(netdev);
2073 struct vnic_dev *vdev = enic->vdev;
2074 unsigned int i, intr;
2075
2076 switch (vnic_dev_get_intr_mode(vdev)) {
2077 case VNIC_DEV_INTR_MODE_MSIX:
2078 for (i = 0; i < enic->rq_count; i++) {
2079 intr = enic_msix_rq_intr(enic, i);
2080 enic_isr_msix(enic->msix_entry[intr].vector,
2081 &enic->napi[i]);
2082 }
2083
2084 for (i = 0; i < enic->wq_count; i++) {
2085 intr = enic_msix_wq_intr(enic, i);
2086 enic_isr_msix(enic->msix_entry[intr].vector,
2087 &enic->napi[enic_cq_wq(enic, i)]);
2088 }
2089
2090 break;
2091 case VNIC_DEV_INTR_MODE_MSI:
2092 enic_isr_msi(enic->pdev->irq, enic);
2093 break;
2094 case VNIC_DEV_INTR_MODE_INTX:
2095 enic_isr_legacy(enic->pdev->irq, netdev);
2096 break;
2097 default:
2098 break;
2099 }
2100}
2101#endif
2102
2103static int enic_dev_wait(struct vnic_dev *vdev,
2104 int (*start)(struct vnic_dev *, int),
2105 int (*finished)(struct vnic_dev *, int *),
2106 int arg)
2107{
2108 unsigned long time;
2109 int done;
2110 int err;
2111
2112 err = start(vdev, arg);
2113 if (err)
2114 return err;
2115
2116 /* Wait for func to complete...2 seconds max
2117 */
2118
2119 time = jiffies + (HZ * 2);
2120 do {
2121
2122 err = finished(vdev, &done);
2123 if (err)
2124 return err;
2125
2126 if (done)
2127 return 0;
2128
2129 schedule_timeout_uninterruptible(HZ / 10);
2130
2131 } while (time_after(time, jiffies));
2132
2133 return -ETIMEDOUT;
2134}
2135
2136static int enic_dev_open(struct enic *enic)
2137{
2138 int err;
2139 u32 flags = CMD_OPENF_IG_DESCCACHE;
2140
2141 err = enic_dev_wait(enic->vdev, vnic_dev_open,
2142 vnic_dev_open_done, flags);
2143 if (err)
2144 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
2145 err);
2146
2147 return err;
2148}
2149
2150static int enic_dev_soft_reset(struct enic *enic)
2151{
2152 int err;
2153
2154 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
2155 vnic_dev_soft_reset_done, 0);
2156 if (err)
2157 netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n",
2158 err);
2159
2160 return err;
2161}
2162
2163static int enic_dev_hang_reset(struct enic *enic)
2164{
2165 int err;
2166
2167 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
2168 vnic_dev_hang_reset_done, 0);
2169 if (err)
2170 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
2171 err);
2172
2173 return err;
2174}
2175
2176int __enic_set_rsskey(struct enic *enic)
2177{
2178 union vnic_rss_key *rss_key_buf_va;
2179 dma_addr_t rss_key_buf_pa;
2180 int i, kidx, bidx, err;
2181
2182 rss_key_buf_va = dma_alloc_coherent(&enic->pdev->dev,
2183 sizeof(union vnic_rss_key),
2184 &rss_key_buf_pa, GFP_ATOMIC);
2185 if (!rss_key_buf_va)
2186 return -ENOMEM;
2187
2188 for (i = 0; i < ENIC_RSS_LEN; i++) {
2189 kidx = i / ENIC_RSS_BYTES_PER_KEY;
2190 bidx = i % ENIC_RSS_BYTES_PER_KEY;
2191 rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i];
2192 }
2193 spin_lock_bh(&enic->devcmd_lock);
2194 err = enic_set_rss_key(enic,
2195 rss_key_buf_pa,
2196 sizeof(union vnic_rss_key));
2197 spin_unlock_bh(&enic->devcmd_lock);
2198
2199 dma_free_coherent(&enic->pdev->dev, sizeof(union vnic_rss_key),
2200 rss_key_buf_va, rss_key_buf_pa);
2201
2202 return err;
2203}
2204
2205static int enic_set_rsskey(struct enic *enic)
2206{
2207 netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN);
2208
2209 return __enic_set_rsskey(enic);
2210}
2211
2212static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
2213{
2214 dma_addr_t rss_cpu_buf_pa;
2215 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
2216 unsigned int i;
2217 int err;
2218
2219 rss_cpu_buf_va = dma_alloc_coherent(&enic->pdev->dev,
2220 sizeof(union vnic_rss_cpu),
2221 &rss_cpu_buf_pa, GFP_ATOMIC);
2222 if (!rss_cpu_buf_va)
2223 return -ENOMEM;
2224
2225 for (i = 0; i < (1 << rss_hash_bits); i++)
2226 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
2227
2228 spin_lock_bh(&enic->devcmd_lock);
2229 err = enic_set_rss_cpu(enic,
2230 rss_cpu_buf_pa,
2231 sizeof(union vnic_rss_cpu));
2232 spin_unlock_bh(&enic->devcmd_lock);
2233
2234 dma_free_coherent(&enic->pdev->dev, sizeof(union vnic_rss_cpu),
2235 rss_cpu_buf_va, rss_cpu_buf_pa);
2236
2237 return err;
2238}
2239
2240static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2241 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
2242{
2243 const u8 tso_ipid_split_en = 0;
2244 const u8 ig_vlan_strip_en = 1;
2245 int err;
2246
2247 /* Enable VLAN tag stripping.
2248 */
2249
2250 spin_lock_bh(&enic->devcmd_lock);
2251 err = enic_set_nic_cfg(enic,
2252 rss_default_cpu, rss_hash_type,
2253 rss_hash_bits, rss_base_cpu,
2254 rss_enable, tso_ipid_split_en,
2255 ig_vlan_strip_en);
2256 spin_unlock_bh(&enic->devcmd_lock);
2257
2258 return err;
2259}
2260
2261static int enic_set_rss_nic_cfg(struct enic *enic)
2262{
2263 struct device *dev = enic_get_dev(enic);
2264 const u8 rss_default_cpu = 0;
2265 const u8 rss_hash_bits = 7;
2266 const u8 rss_base_cpu = 0;
2267 u8 rss_hash_type;
2268 int res;
2269 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2270
2271 spin_lock_bh(&enic->devcmd_lock);
2272 res = vnic_dev_capable_rss_hash_type(enic->vdev, &rss_hash_type);
2273 spin_unlock_bh(&enic->devcmd_lock);
2274 if (res) {
2275 /* defaults for old adapters
2276 */
2277 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
2278 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
2279 NIC_CFG_RSS_HASH_TYPE_IPV6 |
2280 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2281 }
2282
2283 if (rss_enable) {
2284 if (!enic_set_rsskey(enic)) {
2285 if (enic_set_rsscpu(enic, rss_hash_bits)) {
2286 rss_enable = 0;
2287 dev_warn(dev, "RSS disabled, "
2288 "Failed to set RSS cpu indirection table.");
2289 }
2290 } else {
2291 rss_enable = 0;
2292 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2293 }
2294 }
2295
2296 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2297 rss_hash_bits, rss_base_cpu, rss_enable);
2298}
2299
2300static void enic_set_api_busy(struct enic *enic, bool busy)
2301{
2302 spin_lock(&enic->enic_api_lock);
2303 enic->enic_api_busy = busy;
2304 spin_unlock(&enic->enic_api_lock);
2305}
2306
2307static void enic_reset(struct work_struct *work)
2308{
2309 struct enic *enic = container_of(work, struct enic, reset);
2310
2311 if (!netif_running(enic->netdev))
2312 return;
2313
2314 rtnl_lock();
2315
2316 /* Stop any activity from infiniband */
2317 enic_set_api_busy(enic, true);
2318
2319 enic_stop(enic->netdev);
2320 enic_dev_soft_reset(enic);
2321 enic_reset_addr_lists(enic);
2322 enic_init_vnic_resources(enic);
2323 enic_set_rss_nic_cfg(enic);
2324 enic_dev_set_ig_vlan_rewrite_mode(enic);
2325 enic_open(enic->netdev);
2326
2327 /* Allow infiniband to fiddle with the device again */
2328 enic_set_api_busy(enic, false);
2329
2330 call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2331
2332 rtnl_unlock();
2333}
2334
2335static void enic_tx_hang_reset(struct work_struct *work)
2336{
2337 struct enic *enic = container_of(work, struct enic, tx_hang_reset);
2338
2339 rtnl_lock();
2340
2341 /* Stop any activity from infiniband */
2342 enic_set_api_busy(enic, true);
2343
2344 enic_dev_hang_notify(enic);
2345 enic_stop(enic->netdev);
2346 enic_dev_hang_reset(enic);
2347 enic_reset_addr_lists(enic);
2348 enic_init_vnic_resources(enic);
2349 enic_set_rss_nic_cfg(enic);
2350 enic_dev_set_ig_vlan_rewrite_mode(enic);
2351 enic_open(enic->netdev);
2352
2353 /* Allow infiniband to fiddle with the device again */
2354 enic_set_api_busy(enic, false);
2355
2356 call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
2357
2358 rtnl_unlock();
2359}
2360
2361static int enic_set_intr_mode(struct enic *enic)
2362{
2363 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2364 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2365 unsigned int i;
2366
2367 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2368 * on system capabilities.
2369 *
2370 * Try MSI-X first
2371 *
2372 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2373 * (the second to last INTR is used for WQ/RQ errors)
2374 * (the last INTR is used for notifications)
2375 */
2376
2377 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2378 for (i = 0; i < n + m + 2; i++)
2379 enic->msix_entry[i].entry = i;
2380
2381 /* Use multiple RQs if RSS is enabled
2382 */
2383
2384 if (ENIC_SETTING(enic, RSS) &&
2385 enic->config.intr_mode < 1 &&
2386 enic->rq_count >= n &&
2387 enic->wq_count >= m &&
2388 enic->cq_count >= n + m &&
2389 enic->intr_count >= n + m + 2) {
2390
2391 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2392 n + m + 2, n + m + 2) > 0) {
2393
2394 enic->rq_count = n;
2395 enic->wq_count = m;
2396 enic->cq_count = n + m;
2397 enic->intr_count = n + m + 2;
2398
2399 vnic_dev_set_intr_mode(enic->vdev,
2400 VNIC_DEV_INTR_MODE_MSIX);
2401
2402 return 0;
2403 }
2404 }
2405
2406 if (enic->config.intr_mode < 1 &&
2407 enic->rq_count >= 1 &&
2408 enic->wq_count >= m &&
2409 enic->cq_count >= 1 + m &&
2410 enic->intr_count >= 1 + m + 2) {
2411 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2412 1 + m + 2, 1 + m + 2) > 0) {
2413
2414 enic->rq_count = 1;
2415 enic->wq_count = m;
2416 enic->cq_count = 1 + m;
2417 enic->intr_count = 1 + m + 2;
2418
2419 vnic_dev_set_intr_mode(enic->vdev,
2420 VNIC_DEV_INTR_MODE_MSIX);
2421
2422 return 0;
2423 }
2424 }
2425
2426 /* Next try MSI
2427 *
2428 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2429 */
2430
2431 if (enic->config.intr_mode < 2 &&
2432 enic->rq_count >= 1 &&
2433 enic->wq_count >= 1 &&
2434 enic->cq_count >= 2 &&
2435 enic->intr_count >= 1 &&
2436 !pci_enable_msi(enic->pdev)) {
2437
2438 enic->rq_count = 1;
2439 enic->wq_count = 1;
2440 enic->cq_count = 2;
2441 enic->intr_count = 1;
2442
2443 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2444
2445 return 0;
2446 }
2447
2448 /* Next try INTx
2449 *
2450 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2451 * (the first INTR is used for WQ/RQ)
2452 * (the second INTR is used for WQ/RQ errors)
2453 * (the last INTR is used for notifications)
2454 */
2455
2456 if (enic->config.intr_mode < 3 &&
2457 enic->rq_count >= 1 &&
2458 enic->wq_count >= 1 &&
2459 enic->cq_count >= 2 &&
2460 enic->intr_count >= 3) {
2461
2462 enic->rq_count = 1;
2463 enic->wq_count = 1;
2464 enic->cq_count = 2;
2465 enic->intr_count = 3;
2466
2467 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2468
2469 return 0;
2470 }
2471
2472 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2473
2474 return -EINVAL;
2475}
2476
2477static void enic_clear_intr_mode(struct enic *enic)
2478{
2479 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2480 case VNIC_DEV_INTR_MODE_MSIX:
2481 pci_disable_msix(enic->pdev);
2482 break;
2483 case VNIC_DEV_INTR_MODE_MSI:
2484 pci_disable_msi(enic->pdev);
2485 break;
2486 default:
2487 break;
2488 }
2489
2490 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2491}
2492
2493static const struct net_device_ops enic_netdev_dynamic_ops = {
2494 .ndo_open = enic_open,
2495 .ndo_stop = enic_stop,
2496 .ndo_start_xmit = enic_hard_start_xmit,
2497 .ndo_get_stats64 = enic_get_stats,
2498 .ndo_validate_addr = eth_validate_addr,
2499 .ndo_set_rx_mode = enic_set_rx_mode,
2500 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2501 .ndo_change_mtu = enic_change_mtu,
2502 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2503 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2504 .ndo_tx_timeout = enic_tx_timeout,
2505 .ndo_set_vf_port = enic_set_vf_port,
2506 .ndo_get_vf_port = enic_get_vf_port,
2507 .ndo_set_vf_mac = enic_set_vf_mac,
2508#ifdef CONFIG_NET_POLL_CONTROLLER
2509 .ndo_poll_controller = enic_poll_controller,
2510#endif
2511#ifdef CONFIG_RFS_ACCEL
2512 .ndo_rx_flow_steer = enic_rx_flow_steer,
2513#endif
2514 .ndo_features_check = enic_features_check,
2515};
2516
2517static const struct net_device_ops enic_netdev_ops = {
2518 .ndo_open = enic_open,
2519 .ndo_stop = enic_stop,
2520 .ndo_start_xmit = enic_hard_start_xmit,
2521 .ndo_get_stats64 = enic_get_stats,
2522 .ndo_validate_addr = eth_validate_addr,
2523 .ndo_set_mac_address = enic_set_mac_address,
2524 .ndo_set_rx_mode = enic_set_rx_mode,
2525 .ndo_change_mtu = enic_change_mtu,
2526 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2527 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2528 .ndo_tx_timeout = enic_tx_timeout,
2529 .ndo_set_vf_port = enic_set_vf_port,
2530 .ndo_get_vf_port = enic_get_vf_port,
2531 .ndo_set_vf_mac = enic_set_vf_mac,
2532#ifdef CONFIG_NET_POLL_CONTROLLER
2533 .ndo_poll_controller = enic_poll_controller,
2534#endif
2535#ifdef CONFIG_RFS_ACCEL
2536 .ndo_rx_flow_steer = enic_rx_flow_steer,
2537#endif
2538 .ndo_features_check = enic_features_check,
2539};
2540
2541static void enic_dev_deinit(struct enic *enic)
2542{
2543 unsigned int i;
2544
2545 for (i = 0; i < enic->rq_count; i++)
2546 __netif_napi_del(&enic->napi[i]);
2547
2548 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2549 for (i = 0; i < enic->wq_count; i++)
2550 __netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
2551
2552 /* observe RCU grace period after __netif_napi_del() calls */
2553 synchronize_net();
2554
2555 enic_free_vnic_resources(enic);
2556 enic_clear_intr_mode(enic);
2557 enic_free_affinity_hint(enic);
2558}
2559
2560static void enic_kdump_kernel_config(struct enic *enic)
2561{
2562 if (is_kdump_kernel()) {
2563 dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n");
2564 enic->rq_count = 1;
2565 enic->wq_count = 1;
2566 enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS;
2567 enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS;
2568 enic->config.mtu = min_t(u16, 1500, enic->config.mtu);
2569 }
2570}
2571
2572static int enic_dev_init(struct enic *enic)
2573{
2574 struct device *dev = enic_get_dev(enic);
2575 struct net_device *netdev = enic->netdev;
2576 unsigned int i;
2577 int err;
2578
2579 /* Get interrupt coalesce timer info */
2580 err = enic_dev_intr_coal_timer_info(enic);
2581 if (err) {
2582 dev_warn(dev, "Using default conversion factor for "
2583 "interrupt coalesce timer\n");
2584 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2585 }
2586
2587 /* Get vNIC configuration
2588 */
2589
2590 err = enic_get_vnic_config(enic);
2591 if (err) {
2592 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2593 return err;
2594 }
2595
2596 /* Get available resource counts
2597 */
2598
2599 enic_get_res_counts(enic);
2600
2601 /* modify resource count if we are in kdump_kernel
2602 */
2603 enic_kdump_kernel_config(enic);
2604
2605 /* Set interrupt mode based on resource counts and system
2606 * capabilities
2607 */
2608
2609 err = enic_set_intr_mode(enic);
2610 if (err) {
2611 dev_err(dev, "Failed to set intr mode based on resource "
2612 "counts and system capabilities, aborting\n");
2613 return err;
2614 }
2615
2616 /* Allocate and configure vNIC resources
2617 */
2618
2619 err = enic_alloc_vnic_resources(enic);
2620 if (err) {
2621 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2622 goto err_out_free_vnic_resources;
2623 }
2624
2625 enic_init_vnic_resources(enic);
2626
2627 err = enic_set_rss_nic_cfg(enic);
2628 if (err) {
2629 dev_err(dev, "Failed to config nic, aborting\n");
2630 goto err_out_free_vnic_resources;
2631 }
2632
2633 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2634 default:
2635 netif_napi_add(netdev, &enic->napi[0], enic_poll);
2636 break;
2637 case VNIC_DEV_INTR_MODE_MSIX:
2638 for (i = 0; i < enic->rq_count; i++) {
2639 netif_napi_add(netdev, &enic->napi[i],
2640 enic_poll_msix_rq);
2641 }
2642 for (i = 0; i < enic->wq_count; i++)
2643 netif_napi_add(netdev,
2644 &enic->napi[enic_cq_wq(enic, i)],
2645 enic_poll_msix_wq);
2646 break;
2647 }
2648
2649 return 0;
2650
2651err_out_free_vnic_resources:
2652 enic_free_affinity_hint(enic);
2653 enic_clear_intr_mode(enic);
2654 enic_free_vnic_resources(enic);
2655
2656 return err;
2657}
2658
2659static void enic_iounmap(struct enic *enic)
2660{
2661 unsigned int i;
2662
2663 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2664 if (enic->bar[i].vaddr)
2665 iounmap(enic->bar[i].vaddr);
2666}
2667
2668static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2669{
2670 struct device *dev = &pdev->dev;
2671 struct net_device *netdev;
2672 struct enic *enic;
2673 int using_dac = 0;
2674 unsigned int i;
2675 int err;
2676#ifdef CONFIG_PCI_IOV
2677 int pos = 0;
2678#endif
2679 int num_pps = 1;
2680
2681 /* Allocate net device structure and initialize. Private
2682 * instance data is initialized to zero.
2683 */
2684
2685 netdev = alloc_etherdev_mqs(sizeof(struct enic),
2686 ENIC_RQ_MAX, ENIC_WQ_MAX);
2687 if (!netdev)
2688 return -ENOMEM;
2689
2690 pci_set_drvdata(pdev, netdev);
2691
2692 SET_NETDEV_DEV(netdev, &pdev->dev);
2693
2694 enic = netdev_priv(netdev);
2695 enic->netdev = netdev;
2696 enic->pdev = pdev;
2697
2698 /* Setup PCI resources
2699 */
2700
2701 err = pci_enable_device_mem(pdev);
2702 if (err) {
2703 dev_err(dev, "Cannot enable PCI device, aborting\n");
2704 goto err_out_free_netdev;
2705 }
2706
2707 err = pci_request_regions(pdev, DRV_NAME);
2708 if (err) {
2709 dev_err(dev, "Cannot request PCI regions, aborting\n");
2710 goto err_out_disable_device;
2711 }
2712
2713 pci_set_master(pdev);
2714
2715 /* Query PCI controller on system for DMA addressing
2716 * limitation for the device. Try 47-bit first, and
2717 * fail to 32-bit.
2718 */
2719
2720 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47));
2721 if (err) {
2722 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2723 if (err) {
2724 dev_err(dev, "No usable DMA configuration, aborting\n");
2725 goto err_out_release_regions;
2726 }
2727 } else {
2728 using_dac = 1;
2729 }
2730
2731 /* Map vNIC resources from BAR0-5
2732 */
2733
2734 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2735 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2736 continue;
2737 enic->bar[i].len = pci_resource_len(pdev, i);
2738 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2739 if (!enic->bar[i].vaddr) {
2740 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2741 err = -ENODEV;
2742 goto err_out_iounmap;
2743 }
2744 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2745 }
2746
2747 /* Register vNIC device
2748 */
2749
2750 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2751 ARRAY_SIZE(enic->bar));
2752 if (!enic->vdev) {
2753 dev_err(dev, "vNIC registration failed, aborting\n");
2754 err = -ENODEV;
2755 goto err_out_iounmap;
2756 }
2757
2758 err = vnic_devcmd_init(enic->vdev);
2759
2760 if (err)
2761 goto err_out_vnic_unregister;
2762
2763#ifdef CONFIG_PCI_IOV
2764 /* Get number of subvnics */
2765 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2766 if (pos) {
2767 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2768 &enic->num_vfs);
2769 if (enic->num_vfs) {
2770 err = pci_enable_sriov(pdev, enic->num_vfs);
2771 if (err) {
2772 dev_err(dev, "SRIOV enable failed, aborting."
2773 " pci_enable_sriov() returned %d\n",
2774 err);
2775 goto err_out_vnic_unregister;
2776 }
2777 enic->priv_flags |= ENIC_SRIOV_ENABLED;
2778 num_pps = enic->num_vfs;
2779 }
2780 }
2781#endif
2782
2783 /* Allocate structure for port profiles */
2784 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2785 if (!enic->pp) {
2786 err = -ENOMEM;
2787 goto err_out_disable_sriov_pp;
2788 }
2789
2790 /* Issue device open to get device in known state
2791 */
2792
2793 err = enic_dev_open(enic);
2794 if (err) {
2795 dev_err(dev, "vNIC dev open failed, aborting\n");
2796 goto err_out_disable_sriov;
2797 }
2798
2799 /* Setup devcmd lock
2800 */
2801
2802 spin_lock_init(&enic->devcmd_lock);
2803 spin_lock_init(&enic->enic_api_lock);
2804
2805 /*
2806 * Set ingress vlan rewrite mode before vnic initialization
2807 */
2808
2809 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2810 if (err) {
2811 dev_err(dev,
2812 "Failed to set ingress vlan rewrite mode, aborting.\n");
2813 goto err_out_dev_close;
2814 }
2815
2816 /* Issue device init to initialize the vnic-to-switch link.
2817 * We'll start with carrier off and wait for link UP
2818 * notification later to turn on carrier. We don't need
2819 * to wait here for the vnic-to-switch link initialization
2820 * to complete; link UP notification is the indication that
2821 * the process is complete.
2822 */
2823
2824 netif_carrier_off(netdev);
2825
2826 /* Do not call dev_init for a dynamic vnic.
2827 * For a dynamic vnic, init_prov_info will be
2828 * called later by an upper layer.
2829 */
2830
2831 if (!enic_is_dynamic(enic)) {
2832 err = vnic_dev_init(enic->vdev, 0);
2833 if (err) {
2834 dev_err(dev, "vNIC dev init failed, aborting\n");
2835 goto err_out_dev_close;
2836 }
2837 }
2838
2839 err = enic_dev_init(enic);
2840 if (err) {
2841 dev_err(dev, "Device initialization failed, aborting\n");
2842 goto err_out_dev_close;
2843 }
2844
2845 netif_set_real_num_tx_queues(netdev, enic->wq_count);
2846 netif_set_real_num_rx_queues(netdev, enic->rq_count);
2847
2848 /* Setup notification timer, HW reset task, and wq locks
2849 */
2850
2851 timer_setup(&enic->notify_timer, enic_notify_timer, 0);
2852
2853 enic_rfs_flw_tbl_init(enic);
2854 enic_set_rx_coal_setting(enic);
2855 INIT_WORK(&enic->reset, enic_reset);
2856 INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset);
2857 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2858
2859 for (i = 0; i < enic->wq_count; i++)
2860 spin_lock_init(&enic->wq_lock[i]);
2861
2862 /* Register net device
2863 */
2864
2865 enic->port_mtu = enic->config.mtu;
2866
2867 err = enic_set_mac_addr(netdev, enic->mac_addr);
2868 if (err) {
2869 dev_err(dev, "Invalid MAC address, aborting\n");
2870 goto err_out_dev_deinit;
2871 }
2872
2873 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2874 /* rx coalesce time already got initialized. This gets used
2875 * if adaptive coal is turned off
2876 */
2877 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2878
2879 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2880 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2881 else
2882 netdev->netdev_ops = &enic_netdev_ops;
2883
2884 netdev->watchdog_timeo = 2 * HZ;
2885 enic_set_ethtool_ops(netdev);
2886
2887 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2888 if (ENIC_SETTING(enic, LOOP)) {
2889 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2890 enic->loop_enable = 1;
2891 enic->loop_tag = enic->config.loop_tag;
2892 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2893 }
2894 if (ENIC_SETTING(enic, TXCSUM))
2895 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2896 if (ENIC_SETTING(enic, TSO))
2897 netdev->hw_features |= NETIF_F_TSO |
2898 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2899 if (ENIC_SETTING(enic, RSS))
2900 netdev->hw_features |= NETIF_F_RXHASH;
2901 if (ENIC_SETTING(enic, RXCSUM))
2902 netdev->hw_features |= NETIF_F_RXCSUM;
2903 if (ENIC_SETTING(enic, VXLAN)) {
2904 u64 patch_level;
2905 u64 a1 = 0;
2906
2907 netdev->hw_enc_features |= NETIF_F_RXCSUM |
2908 NETIF_F_TSO |
2909 NETIF_F_TSO6 |
2910 NETIF_F_TSO_ECN |
2911 NETIF_F_GSO_UDP_TUNNEL |
2912 NETIF_F_HW_CSUM |
2913 NETIF_F_GSO_UDP_TUNNEL_CSUM;
2914 netdev->hw_features |= netdev->hw_enc_features;
2915 /* get bit mask from hw about supported offload bit level
2916 * BIT(0) = fw supports patch_level 0
2917 * fcoe bit = encap
2918 * fcoe_fc_crc_ok = outer csum ok
2919 * BIT(1) = always set by fw
2920 * BIT(2) = fw supports patch_level 2
2921 * BIT(0) in rss_hash = encap
2922 * BIT(1,2) in rss_hash = outer_ip_csum_ok/
2923 * outer_tcp_csum_ok
2924 * used in enic_rq_indicate_buf
2925 */
2926 err = vnic_dev_get_supported_feature_ver(enic->vdev,
2927 VIC_FEATURE_VXLAN,
2928 &patch_level, &a1);
2929 if (err)
2930 patch_level = 0;
2931 enic->vxlan.flags = (u8)a1;
2932 /* mask bits that are supported by driver
2933 */
2934 patch_level &= BIT_ULL(0) | BIT_ULL(2);
2935 patch_level = fls(patch_level);
2936 patch_level = patch_level ? patch_level - 1 : 0;
2937 enic->vxlan.patch_level = patch_level;
2938
2939 if (vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ) == 1 ||
2940 enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ) {
2941 netdev->udp_tunnel_nic_info = &enic_udp_tunnels_v4;
2942 if (enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)
2943 netdev->udp_tunnel_nic_info = &enic_udp_tunnels;
2944 }
2945 }
2946
2947 netdev->features |= netdev->hw_features;
2948 netdev->vlan_features |= netdev->features;
2949
2950#ifdef CONFIG_RFS_ACCEL
2951 netdev->hw_features |= NETIF_F_NTUPLE;
2952#endif
2953
2954 if (using_dac)
2955 netdev->features |= NETIF_F_HIGHDMA;
2956
2957 netdev->priv_flags |= IFF_UNICAST_FLT;
2958
2959 /* MTU range: 68 - 9000 */
2960 netdev->min_mtu = ENIC_MIN_MTU;
2961 netdev->max_mtu = ENIC_MAX_MTU;
2962 netdev->mtu = enic->port_mtu;
2963
2964 err = register_netdev(netdev);
2965 if (err) {
2966 dev_err(dev, "Cannot register net device, aborting\n");
2967 goto err_out_dev_deinit;
2968 }
2969 enic->rx_copybreak = RX_COPYBREAK_DEFAULT;
2970
2971 return 0;
2972
2973err_out_dev_deinit:
2974 enic_dev_deinit(enic);
2975err_out_dev_close:
2976 vnic_dev_close(enic->vdev);
2977err_out_disable_sriov:
2978 kfree(enic->pp);
2979err_out_disable_sriov_pp:
2980#ifdef CONFIG_PCI_IOV
2981 if (enic_sriov_enabled(enic)) {
2982 pci_disable_sriov(pdev);
2983 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2984 }
2985#endif
2986err_out_vnic_unregister:
2987 vnic_dev_unregister(enic->vdev);
2988err_out_iounmap:
2989 enic_iounmap(enic);
2990err_out_release_regions:
2991 pci_release_regions(pdev);
2992err_out_disable_device:
2993 pci_disable_device(pdev);
2994err_out_free_netdev:
2995 free_netdev(netdev);
2996
2997 return err;
2998}
2999
3000static void enic_remove(struct pci_dev *pdev)
3001{
3002 struct net_device *netdev = pci_get_drvdata(pdev);
3003
3004 if (netdev) {
3005 struct enic *enic = netdev_priv(netdev);
3006
3007 cancel_work_sync(&enic->reset);
3008 cancel_work_sync(&enic->change_mtu_work);
3009 unregister_netdev(netdev);
3010 enic_dev_deinit(enic);
3011 vnic_dev_close(enic->vdev);
3012#ifdef CONFIG_PCI_IOV
3013 if (enic_sriov_enabled(enic)) {
3014 pci_disable_sriov(pdev);
3015 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
3016 }
3017#endif
3018 kfree(enic->pp);
3019 vnic_dev_unregister(enic->vdev);
3020 enic_iounmap(enic);
3021 pci_release_regions(pdev);
3022 pci_disable_device(pdev);
3023 free_netdev(netdev);
3024 }
3025}
3026
3027static struct pci_driver enic_driver = {
3028 .name = DRV_NAME,
3029 .id_table = enic_id_table,
3030 .probe = enic_probe,
3031 .remove = enic_remove,
3032};
3033
3034module_pci_driver(enic_driver);
1/*
2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
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.
8 *
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
16 * SOFTWARE.
17 *
18 */
19
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>
31#include <linux/if.h>
32#include <linux/if_ether.h>
33#include <linux/if_vlan.h>
34#include <linux/in.h>
35#include <linux/ip.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
42#include "cq_enet_desc.h"
43#include "vnic_dev.h"
44#include "vnic_intr.h"
45#include "vnic_stats.h"
46#include "vnic_vic.h"
47#include "enic_res.h"
48#include "enic.h"
49#include "enic_dev.h"
50#include "enic_pp.h"
51
52#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
53#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
54#define MAX_TSO (1 << 16)
55#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
56
57#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
58#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
59#define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */
60
61/* Supported devices */
62static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
63 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
64 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
65 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
66 { 0, } /* end of table */
67};
68
69MODULE_DESCRIPTION(DRV_DESCRIPTION);
70MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
71MODULE_LICENSE("GPL");
72MODULE_VERSION(DRV_VERSION);
73MODULE_DEVICE_TABLE(pci, enic_id_table);
74
75int enic_is_dynamic(struct enic *enic)
76{
77 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
78}
79
80int enic_sriov_enabled(struct enic *enic)
81{
82 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
83}
84
85static int enic_is_sriov_vf(struct enic *enic)
86{
87 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
88}
89
90int enic_is_valid_vf(struct enic *enic, int vf)
91{
92#ifdef CONFIG_PCI_IOV
93 return vf >= 0 && vf < enic->num_vfs;
94#else
95 return 0;
96#endif
97}
98
99static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
100{
101 struct enic *enic = vnic_dev_priv(wq->vdev);
102
103 if (buf->sop)
104 pci_unmap_single(enic->pdev, buf->dma_addr,
105 buf->len, PCI_DMA_TODEVICE);
106 else
107 pci_unmap_page(enic->pdev, buf->dma_addr,
108 buf->len, PCI_DMA_TODEVICE);
109
110 if (buf->os_buf)
111 dev_kfree_skb_any(buf->os_buf);
112}
113
114static void enic_wq_free_buf(struct vnic_wq *wq,
115 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
116{
117 enic_free_wq_buf(wq, buf);
118}
119
120static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
121 u8 type, u16 q_number, u16 completed_index, void *opaque)
122{
123 struct enic *enic = vnic_dev_priv(vdev);
124
125 spin_lock(&enic->wq_lock[q_number]);
126
127 vnic_wq_service(&enic->wq[q_number], cq_desc,
128 completed_index, enic_wq_free_buf,
129 opaque);
130
131 if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
132 vnic_wq_desc_avail(&enic->wq[q_number]) >=
133 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
134 netif_wake_subqueue(enic->netdev, q_number);
135
136 spin_unlock(&enic->wq_lock[q_number]);
137
138 return 0;
139}
140
141static void enic_log_q_error(struct enic *enic)
142{
143 unsigned int i;
144 u32 error_status;
145
146 for (i = 0; i < enic->wq_count; i++) {
147 error_status = vnic_wq_error_status(&enic->wq[i]);
148 if (error_status)
149 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
150 i, error_status);
151 }
152
153 for (i = 0; i < enic->rq_count; i++) {
154 error_status = vnic_rq_error_status(&enic->rq[i]);
155 if (error_status)
156 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
157 i, error_status);
158 }
159}
160
161static void enic_msglvl_check(struct enic *enic)
162{
163 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
164
165 if (msg_enable != enic->msg_enable) {
166 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
167 enic->msg_enable, msg_enable);
168 enic->msg_enable = msg_enable;
169 }
170}
171
172static void enic_mtu_check(struct enic *enic)
173{
174 u32 mtu = vnic_dev_mtu(enic->vdev);
175 struct net_device *netdev = enic->netdev;
176
177 if (mtu && mtu != enic->port_mtu) {
178 enic->port_mtu = mtu;
179 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
180 mtu = max_t(int, ENIC_MIN_MTU,
181 min_t(int, ENIC_MAX_MTU, mtu));
182 if (mtu != netdev->mtu)
183 schedule_work(&enic->change_mtu_work);
184 } else {
185 if (mtu < netdev->mtu)
186 netdev_warn(netdev,
187 "interface MTU (%d) set higher "
188 "than switch port MTU (%d)\n",
189 netdev->mtu, mtu);
190 }
191 }
192}
193
194static void enic_link_check(struct enic *enic)
195{
196 int link_status = vnic_dev_link_status(enic->vdev);
197 int carrier_ok = netif_carrier_ok(enic->netdev);
198
199 if (link_status && !carrier_ok) {
200 netdev_info(enic->netdev, "Link UP\n");
201 netif_carrier_on(enic->netdev);
202 } else if (!link_status && carrier_ok) {
203 netdev_info(enic->netdev, "Link DOWN\n");
204 netif_carrier_off(enic->netdev);
205 }
206}
207
208static void enic_notify_check(struct enic *enic)
209{
210 enic_msglvl_check(enic);
211 enic_mtu_check(enic);
212 enic_link_check(enic);
213}
214
215#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
216
217static irqreturn_t enic_isr_legacy(int irq, void *data)
218{
219 struct net_device *netdev = data;
220 struct enic *enic = netdev_priv(netdev);
221 unsigned int io_intr = enic_legacy_io_intr();
222 unsigned int err_intr = enic_legacy_err_intr();
223 unsigned int notify_intr = enic_legacy_notify_intr();
224 u32 pba;
225
226 vnic_intr_mask(&enic->intr[io_intr]);
227
228 pba = vnic_intr_legacy_pba(enic->legacy_pba);
229 if (!pba) {
230 vnic_intr_unmask(&enic->intr[io_intr]);
231 return IRQ_NONE; /* not our interrupt */
232 }
233
234 if (ENIC_TEST_INTR(pba, notify_intr)) {
235 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
236 enic_notify_check(enic);
237 }
238
239 if (ENIC_TEST_INTR(pba, err_intr)) {
240 vnic_intr_return_all_credits(&enic->intr[err_intr]);
241 enic_log_q_error(enic);
242 /* schedule recovery from WQ/RQ error */
243 schedule_work(&enic->reset);
244 return IRQ_HANDLED;
245 }
246
247 if (ENIC_TEST_INTR(pba, io_intr)) {
248 if (napi_schedule_prep(&enic->napi[0]))
249 __napi_schedule(&enic->napi[0]);
250 } else {
251 vnic_intr_unmask(&enic->intr[io_intr]);
252 }
253
254 return IRQ_HANDLED;
255}
256
257static irqreturn_t enic_isr_msi(int irq, void *data)
258{
259 struct enic *enic = data;
260
261 /* With MSI, there is no sharing of interrupts, so this is
262 * our interrupt and there is no need to ack it. The device
263 * is not providing per-vector masking, so the OS will not
264 * write to PCI config space to mask/unmask the interrupt.
265 * We're using mask_on_assertion for MSI, so the device
266 * automatically masks the interrupt when the interrupt is
267 * generated. Later, when exiting polling, the interrupt
268 * will be unmasked (see enic_poll).
269 *
270 * Also, the device uses the same PCIe Traffic Class (TC)
271 * for Memory Write data and MSI, so there are no ordering
272 * issues; the MSI will always arrive at the Root Complex
273 * _after_ corresponding Memory Writes (i.e. descriptor
274 * writes).
275 */
276
277 napi_schedule(&enic->napi[0]);
278
279 return IRQ_HANDLED;
280}
281
282static irqreturn_t enic_isr_msix_rq(int irq, void *data)
283{
284 struct napi_struct *napi = data;
285
286 /* schedule NAPI polling for RQ cleanup */
287 napi_schedule(napi);
288
289 return IRQ_HANDLED;
290}
291
292static irqreturn_t enic_isr_msix_wq(int irq, void *data)
293{
294 struct enic *enic = data;
295 unsigned int cq;
296 unsigned int intr;
297 unsigned int wq_work_to_do = -1; /* no limit */
298 unsigned int wq_work_done;
299 unsigned int wq_irq;
300
301 wq_irq = (u32)irq - enic->msix_entry[enic_msix_wq_intr(enic, 0)].vector;
302 cq = enic_cq_wq(enic, wq_irq);
303 intr = enic_msix_wq_intr(enic, wq_irq);
304
305 wq_work_done = vnic_cq_service(&enic->cq[cq],
306 wq_work_to_do, enic_wq_service, NULL);
307
308 vnic_intr_return_credits(&enic->intr[intr],
309 wq_work_done,
310 1 /* unmask intr */,
311 1 /* reset intr timer */);
312
313 return IRQ_HANDLED;
314}
315
316static irqreturn_t enic_isr_msix_err(int irq, void *data)
317{
318 struct enic *enic = data;
319 unsigned int intr = enic_msix_err_intr(enic);
320
321 vnic_intr_return_all_credits(&enic->intr[intr]);
322
323 enic_log_q_error(enic);
324
325 /* schedule recovery from WQ/RQ error */
326 schedule_work(&enic->reset);
327
328 return IRQ_HANDLED;
329}
330
331static irqreturn_t enic_isr_msix_notify(int irq, void *data)
332{
333 struct enic *enic = data;
334 unsigned int intr = enic_msix_notify_intr(enic);
335
336 vnic_intr_return_all_credits(&enic->intr[intr]);
337 enic_notify_check(enic);
338
339 return IRQ_HANDLED;
340}
341
342static inline void enic_queue_wq_skb_cont(struct enic *enic,
343 struct vnic_wq *wq, struct sk_buff *skb,
344 unsigned int len_left, int loopback)
345{
346 const skb_frag_t *frag;
347
348 /* Queue additional data fragments */
349 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
350 len_left -= skb_frag_size(frag);
351 enic_queue_wq_desc_cont(wq, skb,
352 skb_frag_dma_map(&enic->pdev->dev,
353 frag, 0, skb_frag_size(frag),
354 DMA_TO_DEVICE),
355 skb_frag_size(frag),
356 (len_left == 0), /* EOP? */
357 loopback);
358 }
359}
360
361static inline void enic_queue_wq_skb_vlan(struct enic *enic,
362 struct vnic_wq *wq, struct sk_buff *skb,
363 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
364{
365 unsigned int head_len = skb_headlen(skb);
366 unsigned int len_left = skb->len - head_len;
367 int eop = (len_left == 0);
368
369 /* Queue the main skb fragment. The fragments are no larger
370 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
371 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
372 * per fragment is queued.
373 */
374 enic_queue_wq_desc(wq, skb,
375 pci_map_single(enic->pdev, skb->data,
376 head_len, PCI_DMA_TODEVICE),
377 head_len,
378 vlan_tag_insert, vlan_tag,
379 eop, loopback);
380
381 if (!eop)
382 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
383}
384
385static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
386 struct vnic_wq *wq, struct sk_buff *skb,
387 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
388{
389 unsigned int head_len = skb_headlen(skb);
390 unsigned int len_left = skb->len - head_len;
391 unsigned int hdr_len = skb_checksum_start_offset(skb);
392 unsigned int csum_offset = hdr_len + skb->csum_offset;
393 int eop = (len_left == 0);
394
395 /* Queue the main skb fragment. The fragments are no larger
396 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
397 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
398 * per fragment is queued.
399 */
400 enic_queue_wq_desc_csum_l4(wq, skb,
401 pci_map_single(enic->pdev, skb->data,
402 head_len, PCI_DMA_TODEVICE),
403 head_len,
404 csum_offset,
405 hdr_len,
406 vlan_tag_insert, vlan_tag,
407 eop, loopback);
408
409 if (!eop)
410 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
411}
412
413static inline void enic_queue_wq_skb_tso(struct enic *enic,
414 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
415 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
416{
417 unsigned int frag_len_left = skb_headlen(skb);
418 unsigned int len_left = skb->len - frag_len_left;
419 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
420 int eop = (len_left == 0);
421 unsigned int len;
422 dma_addr_t dma_addr;
423 unsigned int offset = 0;
424 skb_frag_t *frag;
425
426 /* Preload TCP csum field with IP pseudo hdr calculated
427 * with IP length set to zero. HW will later add in length
428 * to each TCP segment resulting from the TSO.
429 */
430
431 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
432 ip_hdr(skb)->check = 0;
433 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
434 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
435 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
436 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
437 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
438 }
439
440 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
441 * for the main skb fragment
442 */
443 while (frag_len_left) {
444 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
445 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
446 len, PCI_DMA_TODEVICE);
447 enic_queue_wq_desc_tso(wq, skb,
448 dma_addr,
449 len,
450 mss, hdr_len,
451 vlan_tag_insert, vlan_tag,
452 eop && (len == frag_len_left), loopback);
453 frag_len_left -= len;
454 offset += len;
455 }
456
457 if (eop)
458 return;
459
460 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
461 * for additional data fragments
462 */
463 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
464 len_left -= skb_frag_size(frag);
465 frag_len_left = skb_frag_size(frag);
466 offset = 0;
467
468 while (frag_len_left) {
469 len = min(frag_len_left,
470 (unsigned int)WQ_ENET_MAX_DESC_LEN);
471 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
472 offset, len,
473 DMA_TO_DEVICE);
474 enic_queue_wq_desc_cont(wq, skb,
475 dma_addr,
476 len,
477 (len_left == 0) &&
478 (len == frag_len_left), /* EOP? */
479 loopback);
480 frag_len_left -= len;
481 offset += len;
482 }
483 }
484}
485
486static inline void enic_queue_wq_skb(struct enic *enic,
487 struct vnic_wq *wq, struct sk_buff *skb)
488{
489 unsigned int mss = skb_shinfo(skb)->gso_size;
490 unsigned int vlan_tag = 0;
491 int vlan_tag_insert = 0;
492 int loopback = 0;
493
494 if (vlan_tx_tag_present(skb)) {
495 /* VLAN tag from trunking driver */
496 vlan_tag_insert = 1;
497 vlan_tag = vlan_tx_tag_get(skb);
498 } else if (enic->loop_enable) {
499 vlan_tag = enic->loop_tag;
500 loopback = 1;
501 }
502
503 if (mss)
504 enic_queue_wq_skb_tso(enic, wq, skb, mss,
505 vlan_tag_insert, vlan_tag, loopback);
506 else if (skb->ip_summed == CHECKSUM_PARTIAL)
507 enic_queue_wq_skb_csum_l4(enic, wq, skb,
508 vlan_tag_insert, vlan_tag, loopback);
509 else
510 enic_queue_wq_skb_vlan(enic, wq, skb,
511 vlan_tag_insert, vlan_tag, loopback);
512}
513
514/* netif_tx_lock held, process context with BHs disabled, or BH */
515static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
516 struct net_device *netdev)
517{
518 struct enic *enic = netdev_priv(netdev);
519 struct vnic_wq *wq;
520 unsigned long flags;
521 unsigned int txq_map;
522
523 if (skb->len <= 0) {
524 dev_kfree_skb_any(skb);
525 return NETDEV_TX_OK;
526 }
527
528 txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
529 wq = &enic->wq[txq_map];
530
531 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
532 * which is very likely. In the off chance it's going to take
533 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
534 */
535
536 if (skb_shinfo(skb)->gso_size == 0 &&
537 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
538 skb_linearize(skb)) {
539 dev_kfree_skb_any(skb);
540 return NETDEV_TX_OK;
541 }
542
543 spin_lock_irqsave(&enic->wq_lock[txq_map], flags);
544
545 if (vnic_wq_desc_avail(wq) <
546 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
547 netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
548 /* This is a hard error, log it */
549 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
550 spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
551 return NETDEV_TX_BUSY;
552 }
553
554 enic_queue_wq_skb(enic, wq, skb);
555
556 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
557 netif_tx_stop_queue(netdev_get_tx_queue(netdev, txq_map));
558
559 spin_unlock_irqrestore(&enic->wq_lock[txq_map], flags);
560
561 return NETDEV_TX_OK;
562}
563
564/* dev_base_lock rwlock held, nominally process context */
565static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
566 struct rtnl_link_stats64 *net_stats)
567{
568 struct enic *enic = netdev_priv(netdev);
569 struct vnic_stats *stats;
570
571 enic_dev_stats_dump(enic, &stats);
572
573 net_stats->tx_packets = stats->tx.tx_frames_ok;
574 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
575 net_stats->tx_errors = stats->tx.tx_errors;
576 net_stats->tx_dropped = stats->tx.tx_drops;
577
578 net_stats->rx_packets = stats->rx.rx_frames_ok;
579 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
580 net_stats->rx_errors = stats->rx.rx_errors;
581 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
582 net_stats->rx_over_errors = enic->rq_truncated_pkts;
583 net_stats->rx_crc_errors = enic->rq_bad_fcs;
584 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
585
586 return net_stats;
587}
588
589void enic_reset_addr_lists(struct enic *enic)
590{
591 enic->mc_count = 0;
592 enic->uc_count = 0;
593 enic->flags = 0;
594}
595
596static int enic_set_mac_addr(struct net_device *netdev, char *addr)
597{
598 struct enic *enic = netdev_priv(netdev);
599
600 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
601 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
602 return -EADDRNOTAVAIL;
603 } else {
604 if (!is_valid_ether_addr(addr))
605 return -EADDRNOTAVAIL;
606 }
607
608 memcpy(netdev->dev_addr, addr, netdev->addr_len);
609
610 return 0;
611}
612
613static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
614{
615 struct enic *enic = netdev_priv(netdev);
616 struct sockaddr *saddr = p;
617 char *addr = saddr->sa_data;
618 int err;
619
620 if (netif_running(enic->netdev)) {
621 err = enic_dev_del_station_addr(enic);
622 if (err)
623 return err;
624 }
625
626 err = enic_set_mac_addr(netdev, addr);
627 if (err)
628 return err;
629
630 if (netif_running(enic->netdev)) {
631 err = enic_dev_add_station_addr(enic);
632 if (err)
633 return err;
634 }
635
636 return err;
637}
638
639static int enic_set_mac_address(struct net_device *netdev, void *p)
640{
641 struct sockaddr *saddr = p;
642 char *addr = saddr->sa_data;
643 struct enic *enic = netdev_priv(netdev);
644 int err;
645
646 err = enic_dev_del_station_addr(enic);
647 if (err)
648 return err;
649
650 err = enic_set_mac_addr(netdev, addr);
651 if (err)
652 return err;
653
654 return enic_dev_add_station_addr(enic);
655}
656
657static void enic_update_multicast_addr_list(struct enic *enic)
658{
659 struct net_device *netdev = enic->netdev;
660 struct netdev_hw_addr *ha;
661 unsigned int mc_count = netdev_mc_count(netdev);
662 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
663 unsigned int i, j;
664
665 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
666 netdev_warn(netdev, "Registering only %d out of %d "
667 "multicast addresses\n",
668 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
669 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
670 }
671
672 /* Is there an easier way? Trying to minimize to
673 * calls to add/del multicast addrs. We keep the
674 * addrs from the last call in enic->mc_addr and
675 * look for changes to add/del.
676 */
677
678 i = 0;
679 netdev_for_each_mc_addr(ha, netdev) {
680 if (i == mc_count)
681 break;
682 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
683 }
684
685 for (i = 0; i < enic->mc_count; i++) {
686 for (j = 0; j < mc_count; j++)
687 if (ether_addr_equal(enic->mc_addr[i], mc_addr[j]))
688 break;
689 if (j == mc_count)
690 enic_dev_del_addr(enic, enic->mc_addr[i]);
691 }
692
693 for (i = 0; i < mc_count; i++) {
694 for (j = 0; j < enic->mc_count; j++)
695 if (ether_addr_equal(mc_addr[i], enic->mc_addr[j]))
696 break;
697 if (j == enic->mc_count)
698 enic_dev_add_addr(enic, mc_addr[i]);
699 }
700
701 /* Save the list to compare against next time
702 */
703
704 for (i = 0; i < mc_count; i++)
705 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
706
707 enic->mc_count = mc_count;
708}
709
710static void enic_update_unicast_addr_list(struct enic *enic)
711{
712 struct net_device *netdev = enic->netdev;
713 struct netdev_hw_addr *ha;
714 unsigned int uc_count = netdev_uc_count(netdev);
715 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
716 unsigned int i, j;
717
718 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
719 netdev_warn(netdev, "Registering only %d out of %d "
720 "unicast addresses\n",
721 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
722 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
723 }
724
725 /* Is there an easier way? Trying to minimize to
726 * calls to add/del unicast addrs. We keep the
727 * addrs from the last call in enic->uc_addr and
728 * look for changes to add/del.
729 */
730
731 i = 0;
732 netdev_for_each_uc_addr(ha, netdev) {
733 if (i == uc_count)
734 break;
735 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
736 }
737
738 for (i = 0; i < enic->uc_count; i++) {
739 for (j = 0; j < uc_count; j++)
740 if (ether_addr_equal(enic->uc_addr[i], uc_addr[j]))
741 break;
742 if (j == uc_count)
743 enic_dev_del_addr(enic, enic->uc_addr[i]);
744 }
745
746 for (i = 0; i < uc_count; i++) {
747 for (j = 0; j < enic->uc_count; j++)
748 if (ether_addr_equal(uc_addr[i], enic->uc_addr[j]))
749 break;
750 if (j == enic->uc_count)
751 enic_dev_add_addr(enic, uc_addr[i]);
752 }
753
754 /* Save the list to compare against next time
755 */
756
757 for (i = 0; i < uc_count; i++)
758 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
759
760 enic->uc_count = uc_count;
761}
762
763/* netif_tx_lock held, BHs disabled */
764static void enic_set_rx_mode(struct net_device *netdev)
765{
766 struct enic *enic = netdev_priv(netdev);
767 int directed = 1;
768 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
769 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
770 int promisc = (netdev->flags & IFF_PROMISC) ||
771 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
772 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
773 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
774 unsigned int flags = netdev->flags |
775 (allmulti ? IFF_ALLMULTI : 0) |
776 (promisc ? IFF_PROMISC : 0);
777
778 if (enic->flags != flags) {
779 enic->flags = flags;
780 enic_dev_packet_filter(enic, directed,
781 multicast, broadcast, promisc, allmulti);
782 }
783
784 if (!promisc) {
785 enic_update_unicast_addr_list(enic);
786 if (!allmulti)
787 enic_update_multicast_addr_list(enic);
788 }
789}
790
791/* netif_tx_lock held, BHs disabled */
792static void enic_tx_timeout(struct net_device *netdev)
793{
794 struct enic *enic = netdev_priv(netdev);
795 schedule_work(&enic->reset);
796}
797
798static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
799{
800 struct enic *enic = netdev_priv(netdev);
801 struct enic_port_profile *pp;
802 int err;
803
804 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
805 if (err)
806 return err;
807
808 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
809 if (vf == PORT_SELF_VF) {
810 memcpy(pp->vf_mac, mac, ETH_ALEN);
811 return 0;
812 } else {
813 /*
814 * For sriov vf's set the mac in hw
815 */
816 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
817 vnic_dev_set_mac_addr, mac);
818 return enic_dev_status_to_errno(err);
819 }
820 } else
821 return -EINVAL;
822}
823
824static int enic_set_vf_port(struct net_device *netdev, int vf,
825 struct nlattr *port[])
826{
827 struct enic *enic = netdev_priv(netdev);
828 struct enic_port_profile prev_pp;
829 struct enic_port_profile *pp;
830 int err = 0, restore_pp = 1;
831
832 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
833 if (err)
834 return err;
835
836 if (!port[IFLA_PORT_REQUEST])
837 return -EOPNOTSUPP;
838
839 memcpy(&prev_pp, pp, sizeof(*enic->pp));
840 memset(pp, 0, sizeof(*enic->pp));
841
842 pp->set |= ENIC_SET_REQUEST;
843 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
844
845 if (port[IFLA_PORT_PROFILE]) {
846 pp->set |= ENIC_SET_NAME;
847 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
848 PORT_PROFILE_MAX);
849 }
850
851 if (port[IFLA_PORT_INSTANCE_UUID]) {
852 pp->set |= ENIC_SET_INSTANCE;
853 memcpy(pp->instance_uuid,
854 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
855 }
856
857 if (port[IFLA_PORT_HOST_UUID]) {
858 pp->set |= ENIC_SET_HOST;
859 memcpy(pp->host_uuid,
860 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
861 }
862
863 if (vf == PORT_SELF_VF) {
864 /* Special case handling: mac came from IFLA_VF_MAC */
865 if (!is_zero_ether_addr(prev_pp.vf_mac))
866 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
867
868 if (is_zero_ether_addr(netdev->dev_addr))
869 eth_hw_addr_random(netdev);
870 } else {
871 /* SR-IOV VF: get mac from adapter */
872 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
873 vnic_dev_get_mac_addr, pp->mac_addr);
874 if (err) {
875 netdev_err(netdev, "Error getting mac for vf %d\n", vf);
876 memcpy(pp, &prev_pp, sizeof(*pp));
877 return enic_dev_status_to_errno(err);
878 }
879 }
880
881 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
882 if (err) {
883 if (restore_pp) {
884 /* Things are still the way they were: Implicit
885 * DISASSOCIATE failed
886 */
887 memcpy(pp, &prev_pp, sizeof(*pp));
888 } else {
889 memset(pp, 0, sizeof(*pp));
890 if (vf == PORT_SELF_VF)
891 memset(netdev->dev_addr, 0, ETH_ALEN);
892 }
893 } else {
894 /* Set flag to indicate that the port assoc/disassoc
895 * request has been sent out to fw
896 */
897 pp->set |= ENIC_PORT_REQUEST_APPLIED;
898
899 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
900 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
901 memset(pp->mac_addr, 0, ETH_ALEN);
902 if (vf == PORT_SELF_VF)
903 memset(netdev->dev_addr, 0, ETH_ALEN);
904 }
905 }
906
907 if (vf == PORT_SELF_VF)
908 memset(pp->vf_mac, 0, ETH_ALEN);
909
910 return err;
911}
912
913static int enic_get_vf_port(struct net_device *netdev, int vf,
914 struct sk_buff *skb)
915{
916 struct enic *enic = netdev_priv(netdev);
917 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
918 struct enic_port_profile *pp;
919 int err;
920
921 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
922 if (err)
923 return err;
924
925 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
926 return -ENODATA;
927
928 err = enic_process_get_pp_request(enic, vf, pp->request, &response);
929 if (err)
930 return err;
931
932 if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
933 nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
934 ((pp->set & ENIC_SET_NAME) &&
935 nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
936 ((pp->set & ENIC_SET_INSTANCE) &&
937 nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
938 pp->instance_uuid)) ||
939 ((pp->set & ENIC_SET_HOST) &&
940 nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
941 goto nla_put_failure;
942 return 0;
943
944nla_put_failure:
945 return -EMSGSIZE;
946}
947
948static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
949{
950 struct enic *enic = vnic_dev_priv(rq->vdev);
951
952 if (!buf->os_buf)
953 return;
954
955 pci_unmap_single(enic->pdev, buf->dma_addr,
956 buf->len, PCI_DMA_FROMDEVICE);
957 dev_kfree_skb_any(buf->os_buf);
958}
959
960static int enic_rq_alloc_buf(struct vnic_rq *rq)
961{
962 struct enic *enic = vnic_dev_priv(rq->vdev);
963 struct net_device *netdev = enic->netdev;
964 struct sk_buff *skb;
965 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
966 unsigned int os_buf_index = 0;
967 dma_addr_t dma_addr;
968
969 skb = netdev_alloc_skb_ip_align(netdev, len);
970 if (!skb)
971 return -ENOMEM;
972
973 dma_addr = pci_map_single(enic->pdev, skb->data,
974 len, PCI_DMA_FROMDEVICE);
975
976 enic_queue_rq_desc(rq, skb, os_buf_index,
977 dma_addr, len);
978
979 return 0;
980}
981
982static void enic_rq_indicate_buf(struct vnic_rq *rq,
983 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
984 int skipped, void *opaque)
985{
986 struct enic *enic = vnic_dev_priv(rq->vdev);
987 struct net_device *netdev = enic->netdev;
988 struct sk_buff *skb;
989
990 u8 type, color, eop, sop, ingress_port, vlan_stripped;
991 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
992 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
993 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
994 u8 packet_error;
995 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
996 u32 rss_hash;
997
998 if (skipped)
999 return;
1000
1001 skb = buf->os_buf;
1002 prefetch(skb->data - NET_IP_ALIGN);
1003 pci_unmap_single(enic->pdev, buf->dma_addr,
1004 buf->len, PCI_DMA_FROMDEVICE);
1005
1006 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1007 &type, &color, &q_number, &completed_index,
1008 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1009 &csum_not_calc, &rss_hash, &bytes_written,
1010 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1011 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1012 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1013 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1014 &fcs_ok);
1015
1016 if (packet_error) {
1017
1018 if (!fcs_ok) {
1019 if (bytes_written > 0)
1020 enic->rq_bad_fcs++;
1021 else if (bytes_written == 0)
1022 enic->rq_truncated_pkts++;
1023 }
1024
1025 dev_kfree_skb_any(skb);
1026
1027 return;
1028 }
1029
1030 if (eop && bytes_written > 0) {
1031
1032 /* Good receive
1033 */
1034
1035 skb_put(skb, bytes_written);
1036 skb->protocol = eth_type_trans(skb, netdev);
1037 skb_record_rx_queue(skb, q_number);
1038 if (netdev->features & NETIF_F_RXHASH) {
1039 skb_set_hash(skb, rss_hash,
1040 (rss_type &
1041 (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
1042 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
1043 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
1044 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1045 }
1046
1047 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1048 skb->csum = htons(checksum);
1049 skb->ip_summed = CHECKSUM_COMPLETE;
1050 }
1051
1052 if (vlan_stripped)
1053 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1054
1055 if (netdev->features & NETIF_F_GRO)
1056 napi_gro_receive(&enic->napi[q_number], skb);
1057 else
1058 netif_receive_skb(skb);
1059 } else {
1060
1061 /* Buffer overflow
1062 */
1063
1064 dev_kfree_skb_any(skb);
1065 }
1066}
1067
1068static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1069 u8 type, u16 q_number, u16 completed_index, void *opaque)
1070{
1071 struct enic *enic = vnic_dev_priv(vdev);
1072
1073 vnic_rq_service(&enic->rq[q_number], cq_desc,
1074 completed_index, VNIC_RQ_RETURN_DESC,
1075 enic_rq_indicate_buf, opaque);
1076
1077 return 0;
1078}
1079
1080static int enic_poll(struct napi_struct *napi, int budget)
1081{
1082 struct net_device *netdev = napi->dev;
1083 struct enic *enic = netdev_priv(netdev);
1084 unsigned int cq_rq = enic_cq_rq(enic, 0);
1085 unsigned int cq_wq = enic_cq_wq(enic, 0);
1086 unsigned int intr = enic_legacy_io_intr();
1087 unsigned int rq_work_to_do = budget;
1088 unsigned int wq_work_to_do = -1; /* no limit */
1089 unsigned int work_done, rq_work_done = 0, wq_work_done;
1090 int err;
1091
1092 /* Service RQ (first) and WQ
1093 */
1094
1095 if (budget > 0)
1096 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1097 rq_work_to_do, enic_rq_service, NULL);
1098
1099 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1100 wq_work_to_do, enic_wq_service, NULL);
1101
1102 /* Accumulate intr event credits for this polling
1103 * cycle. An intr event is the completion of a
1104 * a WQ or RQ packet.
1105 */
1106
1107 work_done = rq_work_done + wq_work_done;
1108
1109 if (work_done > 0)
1110 vnic_intr_return_credits(&enic->intr[intr],
1111 work_done,
1112 0 /* don't unmask intr */,
1113 0 /* don't reset intr timer */);
1114
1115 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1116
1117 /* Buffer allocation failed. Stay in polling
1118 * mode so we can try to fill the ring again.
1119 */
1120
1121 if (err)
1122 rq_work_done = rq_work_to_do;
1123
1124 if (rq_work_done < rq_work_to_do) {
1125
1126 /* Some work done, but not enough to stay in polling,
1127 * exit polling
1128 */
1129
1130 napi_complete(napi);
1131 vnic_intr_unmask(&enic->intr[intr]);
1132 }
1133
1134 return rq_work_done;
1135}
1136
1137static int enic_poll_msix(struct napi_struct *napi, int budget)
1138{
1139 struct net_device *netdev = napi->dev;
1140 struct enic *enic = netdev_priv(netdev);
1141 unsigned int rq = (napi - &enic->napi[0]);
1142 unsigned int cq = enic_cq_rq(enic, rq);
1143 unsigned int intr = enic_msix_rq_intr(enic, rq);
1144 unsigned int work_to_do = budget;
1145 unsigned int work_done = 0;
1146 int err;
1147
1148 /* Service RQ
1149 */
1150
1151 if (budget > 0)
1152 work_done = vnic_cq_service(&enic->cq[cq],
1153 work_to_do, enic_rq_service, NULL);
1154
1155 /* Return intr event credits for this polling
1156 * cycle. An intr event is the completion of a
1157 * RQ packet.
1158 */
1159
1160 if (work_done > 0)
1161 vnic_intr_return_credits(&enic->intr[intr],
1162 work_done,
1163 0 /* don't unmask intr */,
1164 0 /* don't reset intr timer */);
1165
1166 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1167
1168 /* Buffer allocation failed. Stay in polling mode
1169 * so we can try to fill the ring again.
1170 */
1171
1172 if (err)
1173 work_done = work_to_do;
1174
1175 if (work_done < work_to_do) {
1176
1177 /* Some work done, but not enough to stay in polling,
1178 * exit polling
1179 */
1180
1181 napi_complete(napi);
1182 vnic_intr_unmask(&enic->intr[intr]);
1183 }
1184
1185 return work_done;
1186}
1187
1188static void enic_notify_timer(unsigned long data)
1189{
1190 struct enic *enic = (struct enic *)data;
1191
1192 enic_notify_check(enic);
1193
1194 mod_timer(&enic->notify_timer,
1195 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1196}
1197
1198static void enic_free_intr(struct enic *enic)
1199{
1200 struct net_device *netdev = enic->netdev;
1201 unsigned int i;
1202
1203 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1204 case VNIC_DEV_INTR_MODE_INTX:
1205 free_irq(enic->pdev->irq, netdev);
1206 break;
1207 case VNIC_DEV_INTR_MODE_MSI:
1208 free_irq(enic->pdev->irq, enic);
1209 break;
1210 case VNIC_DEV_INTR_MODE_MSIX:
1211 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1212 if (enic->msix[i].requested)
1213 free_irq(enic->msix_entry[i].vector,
1214 enic->msix[i].devid);
1215 break;
1216 default:
1217 break;
1218 }
1219}
1220
1221static int enic_request_intr(struct enic *enic)
1222{
1223 struct net_device *netdev = enic->netdev;
1224 unsigned int i, intr;
1225 int err = 0;
1226
1227 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1228
1229 case VNIC_DEV_INTR_MODE_INTX:
1230
1231 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1232 IRQF_SHARED, netdev->name, netdev);
1233 break;
1234
1235 case VNIC_DEV_INTR_MODE_MSI:
1236
1237 err = request_irq(enic->pdev->irq, enic_isr_msi,
1238 0, netdev->name, enic);
1239 break;
1240
1241 case VNIC_DEV_INTR_MODE_MSIX:
1242
1243 for (i = 0; i < enic->rq_count; i++) {
1244 intr = enic_msix_rq_intr(enic, i);
1245 snprintf(enic->msix[intr].devname,
1246 sizeof(enic->msix[intr].devname),
1247 "%.11s-rx-%d", netdev->name, i);
1248 enic->msix[intr].isr = enic_isr_msix_rq;
1249 enic->msix[intr].devid = &enic->napi[i];
1250 }
1251
1252 for (i = 0; i < enic->wq_count; i++) {
1253 intr = enic_msix_wq_intr(enic, i);
1254 snprintf(enic->msix[intr].devname,
1255 sizeof(enic->msix[intr].devname),
1256 "%.11s-tx-%d", netdev->name, i);
1257 enic->msix[intr].isr = enic_isr_msix_wq;
1258 enic->msix[intr].devid = enic;
1259 }
1260
1261 intr = enic_msix_err_intr(enic);
1262 snprintf(enic->msix[intr].devname,
1263 sizeof(enic->msix[intr].devname),
1264 "%.11s-err", netdev->name);
1265 enic->msix[intr].isr = enic_isr_msix_err;
1266 enic->msix[intr].devid = enic;
1267
1268 intr = enic_msix_notify_intr(enic);
1269 snprintf(enic->msix[intr].devname,
1270 sizeof(enic->msix[intr].devname),
1271 "%.11s-notify", netdev->name);
1272 enic->msix[intr].isr = enic_isr_msix_notify;
1273 enic->msix[intr].devid = enic;
1274
1275 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1276 enic->msix[i].requested = 0;
1277
1278 for (i = 0; i < enic->intr_count; i++) {
1279 err = request_irq(enic->msix_entry[i].vector,
1280 enic->msix[i].isr, 0,
1281 enic->msix[i].devname,
1282 enic->msix[i].devid);
1283 if (err) {
1284 enic_free_intr(enic);
1285 break;
1286 }
1287 enic->msix[i].requested = 1;
1288 }
1289
1290 break;
1291
1292 default:
1293 break;
1294 }
1295
1296 return err;
1297}
1298
1299static void enic_synchronize_irqs(struct enic *enic)
1300{
1301 unsigned int i;
1302
1303 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1304 case VNIC_DEV_INTR_MODE_INTX:
1305 case VNIC_DEV_INTR_MODE_MSI:
1306 synchronize_irq(enic->pdev->irq);
1307 break;
1308 case VNIC_DEV_INTR_MODE_MSIX:
1309 for (i = 0; i < enic->intr_count; i++)
1310 synchronize_irq(enic->msix_entry[i].vector);
1311 break;
1312 default:
1313 break;
1314 }
1315}
1316
1317static int enic_dev_notify_set(struct enic *enic)
1318{
1319 int err;
1320
1321 spin_lock(&enic->devcmd_lock);
1322 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1323 case VNIC_DEV_INTR_MODE_INTX:
1324 err = vnic_dev_notify_set(enic->vdev,
1325 enic_legacy_notify_intr());
1326 break;
1327 case VNIC_DEV_INTR_MODE_MSIX:
1328 err = vnic_dev_notify_set(enic->vdev,
1329 enic_msix_notify_intr(enic));
1330 break;
1331 default:
1332 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1333 break;
1334 }
1335 spin_unlock(&enic->devcmd_lock);
1336
1337 return err;
1338}
1339
1340static void enic_notify_timer_start(struct enic *enic)
1341{
1342 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1343 case VNIC_DEV_INTR_MODE_MSI:
1344 mod_timer(&enic->notify_timer, jiffies);
1345 break;
1346 default:
1347 /* Using intr for notification for INTx/MSI-X */
1348 break;
1349 }
1350}
1351
1352/* rtnl lock is held, process context */
1353static int enic_open(struct net_device *netdev)
1354{
1355 struct enic *enic = netdev_priv(netdev);
1356 unsigned int i;
1357 int err;
1358
1359 err = enic_request_intr(enic);
1360 if (err) {
1361 netdev_err(netdev, "Unable to request irq.\n");
1362 return err;
1363 }
1364
1365 err = enic_dev_notify_set(enic);
1366 if (err) {
1367 netdev_err(netdev,
1368 "Failed to alloc notify buffer, aborting.\n");
1369 goto err_out_free_intr;
1370 }
1371
1372 for (i = 0; i < enic->rq_count; i++) {
1373 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1374 /* Need at least one buffer on ring to get going */
1375 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1376 netdev_err(netdev, "Unable to alloc receive buffers\n");
1377 err = -ENOMEM;
1378 goto err_out_notify_unset;
1379 }
1380 }
1381
1382 for (i = 0; i < enic->wq_count; i++)
1383 vnic_wq_enable(&enic->wq[i]);
1384 for (i = 0; i < enic->rq_count; i++)
1385 vnic_rq_enable(&enic->rq[i]);
1386
1387 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1388 enic_dev_add_station_addr(enic);
1389
1390 enic_set_rx_mode(netdev);
1391
1392 netif_tx_wake_all_queues(netdev);
1393
1394 for (i = 0; i < enic->rq_count; i++)
1395 napi_enable(&enic->napi[i]);
1396
1397 enic_dev_enable(enic);
1398
1399 for (i = 0; i < enic->intr_count; i++)
1400 vnic_intr_unmask(&enic->intr[i]);
1401
1402 enic_notify_timer_start(enic);
1403
1404 return 0;
1405
1406err_out_notify_unset:
1407 enic_dev_notify_unset(enic);
1408err_out_free_intr:
1409 enic_free_intr(enic);
1410
1411 return err;
1412}
1413
1414/* rtnl lock is held, process context */
1415static int enic_stop(struct net_device *netdev)
1416{
1417 struct enic *enic = netdev_priv(netdev);
1418 unsigned int i;
1419 int err;
1420
1421 for (i = 0; i < enic->intr_count; i++) {
1422 vnic_intr_mask(&enic->intr[i]);
1423 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1424 }
1425
1426 enic_synchronize_irqs(enic);
1427
1428 del_timer_sync(&enic->notify_timer);
1429
1430 enic_dev_disable(enic);
1431
1432 for (i = 0; i < enic->rq_count; i++)
1433 napi_disable(&enic->napi[i]);
1434
1435 netif_carrier_off(netdev);
1436 netif_tx_disable(netdev);
1437
1438 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1439 enic_dev_del_station_addr(enic);
1440
1441 for (i = 0; i < enic->wq_count; i++) {
1442 err = vnic_wq_disable(&enic->wq[i]);
1443 if (err)
1444 return err;
1445 }
1446 for (i = 0; i < enic->rq_count; i++) {
1447 err = vnic_rq_disable(&enic->rq[i]);
1448 if (err)
1449 return err;
1450 }
1451
1452 enic_dev_notify_unset(enic);
1453 enic_free_intr(enic);
1454
1455 for (i = 0; i < enic->wq_count; i++)
1456 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1457 for (i = 0; i < enic->rq_count; i++)
1458 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1459 for (i = 0; i < enic->cq_count; i++)
1460 vnic_cq_clean(&enic->cq[i]);
1461 for (i = 0; i < enic->intr_count; i++)
1462 vnic_intr_clean(&enic->intr[i]);
1463
1464 return 0;
1465}
1466
1467static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1468{
1469 struct enic *enic = netdev_priv(netdev);
1470 int running = netif_running(netdev);
1471
1472 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1473 return -EINVAL;
1474
1475 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1476 return -EOPNOTSUPP;
1477
1478 if (running)
1479 enic_stop(netdev);
1480
1481 netdev->mtu = new_mtu;
1482
1483 if (netdev->mtu > enic->port_mtu)
1484 netdev_warn(netdev,
1485 "interface MTU (%d) set higher than port MTU (%d)\n",
1486 netdev->mtu, enic->port_mtu);
1487
1488 if (running)
1489 enic_open(netdev);
1490
1491 return 0;
1492}
1493
1494static void enic_change_mtu_work(struct work_struct *work)
1495{
1496 struct enic *enic = container_of(work, struct enic, change_mtu_work);
1497 struct net_device *netdev = enic->netdev;
1498 int new_mtu = vnic_dev_mtu(enic->vdev);
1499 int err;
1500 unsigned int i;
1501
1502 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1503
1504 rtnl_lock();
1505
1506 /* Stop RQ */
1507 del_timer_sync(&enic->notify_timer);
1508
1509 for (i = 0; i < enic->rq_count; i++)
1510 napi_disable(&enic->napi[i]);
1511
1512 vnic_intr_mask(&enic->intr[0]);
1513 enic_synchronize_irqs(enic);
1514 err = vnic_rq_disable(&enic->rq[0]);
1515 if (err) {
1516 rtnl_unlock();
1517 netdev_err(netdev, "Unable to disable RQ.\n");
1518 return;
1519 }
1520 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1521 vnic_cq_clean(&enic->cq[0]);
1522 vnic_intr_clean(&enic->intr[0]);
1523
1524 /* Fill RQ with new_mtu-sized buffers */
1525 netdev->mtu = new_mtu;
1526 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1527 /* Need at least one buffer on ring to get going */
1528 if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1529 rtnl_unlock();
1530 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1531 return;
1532 }
1533
1534 /* Start RQ */
1535 vnic_rq_enable(&enic->rq[0]);
1536 napi_enable(&enic->napi[0]);
1537 vnic_intr_unmask(&enic->intr[0]);
1538 enic_notify_timer_start(enic);
1539
1540 rtnl_unlock();
1541
1542 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1543}
1544
1545#ifdef CONFIG_NET_POLL_CONTROLLER
1546static void enic_poll_controller(struct net_device *netdev)
1547{
1548 struct enic *enic = netdev_priv(netdev);
1549 struct vnic_dev *vdev = enic->vdev;
1550 unsigned int i, intr;
1551
1552 switch (vnic_dev_get_intr_mode(vdev)) {
1553 case VNIC_DEV_INTR_MODE_MSIX:
1554 for (i = 0; i < enic->rq_count; i++) {
1555 intr = enic_msix_rq_intr(enic, i);
1556 enic_isr_msix_rq(enic->msix_entry[intr].vector,
1557 &enic->napi[i]);
1558 }
1559
1560 for (i = 0; i < enic->wq_count; i++) {
1561 intr = enic_msix_wq_intr(enic, i);
1562 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1563 }
1564
1565 break;
1566 case VNIC_DEV_INTR_MODE_MSI:
1567 enic_isr_msi(enic->pdev->irq, enic);
1568 break;
1569 case VNIC_DEV_INTR_MODE_INTX:
1570 enic_isr_legacy(enic->pdev->irq, netdev);
1571 break;
1572 default:
1573 break;
1574 }
1575}
1576#endif
1577
1578static int enic_dev_wait(struct vnic_dev *vdev,
1579 int (*start)(struct vnic_dev *, int),
1580 int (*finished)(struct vnic_dev *, int *),
1581 int arg)
1582{
1583 unsigned long time;
1584 int done;
1585 int err;
1586
1587 BUG_ON(in_interrupt());
1588
1589 err = start(vdev, arg);
1590 if (err)
1591 return err;
1592
1593 /* Wait for func to complete...2 seconds max
1594 */
1595
1596 time = jiffies + (HZ * 2);
1597 do {
1598
1599 err = finished(vdev, &done);
1600 if (err)
1601 return err;
1602
1603 if (done)
1604 return 0;
1605
1606 schedule_timeout_uninterruptible(HZ / 10);
1607
1608 } while (time_after(time, jiffies));
1609
1610 return -ETIMEDOUT;
1611}
1612
1613static int enic_dev_open(struct enic *enic)
1614{
1615 int err;
1616
1617 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1618 vnic_dev_open_done, 0);
1619 if (err)
1620 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1621 err);
1622
1623 return err;
1624}
1625
1626static int enic_dev_hang_reset(struct enic *enic)
1627{
1628 int err;
1629
1630 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1631 vnic_dev_hang_reset_done, 0);
1632 if (err)
1633 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1634 err);
1635
1636 return err;
1637}
1638
1639static int enic_set_rsskey(struct enic *enic)
1640{
1641 dma_addr_t rss_key_buf_pa;
1642 union vnic_rss_key *rss_key_buf_va = NULL;
1643 union vnic_rss_key rss_key = {
1644 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1645 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1646 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1647 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1648 };
1649 int err;
1650
1651 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1652 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1653 if (!rss_key_buf_va)
1654 return -ENOMEM;
1655
1656 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1657
1658 spin_lock(&enic->devcmd_lock);
1659 err = enic_set_rss_key(enic,
1660 rss_key_buf_pa,
1661 sizeof(union vnic_rss_key));
1662 spin_unlock(&enic->devcmd_lock);
1663
1664 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1665 rss_key_buf_va, rss_key_buf_pa);
1666
1667 return err;
1668}
1669
1670static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1671{
1672 dma_addr_t rss_cpu_buf_pa;
1673 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1674 unsigned int i;
1675 int err;
1676
1677 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1678 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1679 if (!rss_cpu_buf_va)
1680 return -ENOMEM;
1681
1682 for (i = 0; i < (1 << rss_hash_bits); i++)
1683 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1684
1685 spin_lock(&enic->devcmd_lock);
1686 err = enic_set_rss_cpu(enic,
1687 rss_cpu_buf_pa,
1688 sizeof(union vnic_rss_cpu));
1689 spin_unlock(&enic->devcmd_lock);
1690
1691 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1692 rss_cpu_buf_va, rss_cpu_buf_pa);
1693
1694 return err;
1695}
1696
1697static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1698 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1699{
1700 const u8 tso_ipid_split_en = 0;
1701 const u8 ig_vlan_strip_en = 1;
1702 int err;
1703
1704 /* Enable VLAN tag stripping.
1705 */
1706
1707 spin_lock(&enic->devcmd_lock);
1708 err = enic_set_nic_cfg(enic,
1709 rss_default_cpu, rss_hash_type,
1710 rss_hash_bits, rss_base_cpu,
1711 rss_enable, tso_ipid_split_en,
1712 ig_vlan_strip_en);
1713 spin_unlock(&enic->devcmd_lock);
1714
1715 return err;
1716}
1717
1718static int enic_set_rss_nic_cfg(struct enic *enic)
1719{
1720 struct device *dev = enic_get_dev(enic);
1721 const u8 rss_default_cpu = 0;
1722 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1723 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1724 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1725 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1726 const u8 rss_hash_bits = 7;
1727 const u8 rss_base_cpu = 0;
1728 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1729
1730 if (rss_enable) {
1731 if (!enic_set_rsskey(enic)) {
1732 if (enic_set_rsscpu(enic, rss_hash_bits)) {
1733 rss_enable = 0;
1734 dev_warn(dev, "RSS disabled, "
1735 "Failed to set RSS cpu indirection table.");
1736 }
1737 } else {
1738 rss_enable = 0;
1739 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1740 }
1741 }
1742
1743 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1744 rss_hash_bits, rss_base_cpu, rss_enable);
1745}
1746
1747static void enic_reset(struct work_struct *work)
1748{
1749 struct enic *enic = container_of(work, struct enic, reset);
1750
1751 if (!netif_running(enic->netdev))
1752 return;
1753
1754 rtnl_lock();
1755
1756 spin_lock(&enic->enic_api_lock);
1757 enic_dev_hang_notify(enic);
1758 enic_stop(enic->netdev);
1759 enic_dev_hang_reset(enic);
1760 enic_reset_addr_lists(enic);
1761 enic_init_vnic_resources(enic);
1762 enic_set_rss_nic_cfg(enic);
1763 enic_dev_set_ig_vlan_rewrite_mode(enic);
1764 enic_open(enic->netdev);
1765 spin_unlock(&enic->enic_api_lock);
1766 call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
1767
1768 rtnl_unlock();
1769}
1770
1771static int enic_set_intr_mode(struct enic *enic)
1772{
1773 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1774 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
1775 unsigned int i;
1776
1777 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1778 * on system capabilities.
1779 *
1780 * Try MSI-X first
1781 *
1782 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1783 * (the second to last INTR is used for WQ/RQ errors)
1784 * (the last INTR is used for notifications)
1785 */
1786
1787 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1788 for (i = 0; i < n + m + 2; i++)
1789 enic->msix_entry[i].entry = i;
1790
1791 /* Use multiple RQs if RSS is enabled
1792 */
1793
1794 if (ENIC_SETTING(enic, RSS) &&
1795 enic->config.intr_mode < 1 &&
1796 enic->rq_count >= n &&
1797 enic->wq_count >= m &&
1798 enic->cq_count >= n + m &&
1799 enic->intr_count >= n + m + 2) {
1800
1801 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
1802 n + m + 2, n + m + 2) > 0) {
1803
1804 enic->rq_count = n;
1805 enic->wq_count = m;
1806 enic->cq_count = n + m;
1807 enic->intr_count = n + m + 2;
1808
1809 vnic_dev_set_intr_mode(enic->vdev,
1810 VNIC_DEV_INTR_MODE_MSIX);
1811
1812 return 0;
1813 }
1814 }
1815
1816 if (enic->config.intr_mode < 1 &&
1817 enic->rq_count >= 1 &&
1818 enic->wq_count >= m &&
1819 enic->cq_count >= 1 + m &&
1820 enic->intr_count >= 1 + m + 2) {
1821 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
1822 1 + m + 2, 1 + m + 2) > 0) {
1823
1824 enic->rq_count = 1;
1825 enic->wq_count = m;
1826 enic->cq_count = 1 + m;
1827 enic->intr_count = 1 + m + 2;
1828
1829 vnic_dev_set_intr_mode(enic->vdev,
1830 VNIC_DEV_INTR_MODE_MSIX);
1831
1832 return 0;
1833 }
1834 }
1835
1836 /* Next try MSI
1837 *
1838 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1839 */
1840
1841 if (enic->config.intr_mode < 2 &&
1842 enic->rq_count >= 1 &&
1843 enic->wq_count >= 1 &&
1844 enic->cq_count >= 2 &&
1845 enic->intr_count >= 1 &&
1846 !pci_enable_msi(enic->pdev)) {
1847
1848 enic->rq_count = 1;
1849 enic->wq_count = 1;
1850 enic->cq_count = 2;
1851 enic->intr_count = 1;
1852
1853 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1854
1855 return 0;
1856 }
1857
1858 /* Next try INTx
1859 *
1860 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1861 * (the first INTR is used for WQ/RQ)
1862 * (the second INTR is used for WQ/RQ errors)
1863 * (the last INTR is used for notifications)
1864 */
1865
1866 if (enic->config.intr_mode < 3 &&
1867 enic->rq_count >= 1 &&
1868 enic->wq_count >= 1 &&
1869 enic->cq_count >= 2 &&
1870 enic->intr_count >= 3) {
1871
1872 enic->rq_count = 1;
1873 enic->wq_count = 1;
1874 enic->cq_count = 2;
1875 enic->intr_count = 3;
1876
1877 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1878
1879 return 0;
1880 }
1881
1882 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1883
1884 return -EINVAL;
1885}
1886
1887static void enic_clear_intr_mode(struct enic *enic)
1888{
1889 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1890 case VNIC_DEV_INTR_MODE_MSIX:
1891 pci_disable_msix(enic->pdev);
1892 break;
1893 case VNIC_DEV_INTR_MODE_MSI:
1894 pci_disable_msi(enic->pdev);
1895 break;
1896 default:
1897 break;
1898 }
1899
1900 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1901}
1902
1903static const struct net_device_ops enic_netdev_dynamic_ops = {
1904 .ndo_open = enic_open,
1905 .ndo_stop = enic_stop,
1906 .ndo_start_xmit = enic_hard_start_xmit,
1907 .ndo_get_stats64 = enic_get_stats,
1908 .ndo_validate_addr = eth_validate_addr,
1909 .ndo_set_rx_mode = enic_set_rx_mode,
1910 .ndo_set_mac_address = enic_set_mac_address_dynamic,
1911 .ndo_change_mtu = enic_change_mtu,
1912 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
1913 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
1914 .ndo_tx_timeout = enic_tx_timeout,
1915 .ndo_set_vf_port = enic_set_vf_port,
1916 .ndo_get_vf_port = enic_get_vf_port,
1917 .ndo_set_vf_mac = enic_set_vf_mac,
1918#ifdef CONFIG_NET_POLL_CONTROLLER
1919 .ndo_poll_controller = enic_poll_controller,
1920#endif
1921};
1922
1923static const struct net_device_ops enic_netdev_ops = {
1924 .ndo_open = enic_open,
1925 .ndo_stop = enic_stop,
1926 .ndo_start_xmit = enic_hard_start_xmit,
1927 .ndo_get_stats64 = enic_get_stats,
1928 .ndo_validate_addr = eth_validate_addr,
1929 .ndo_set_mac_address = enic_set_mac_address,
1930 .ndo_set_rx_mode = enic_set_rx_mode,
1931 .ndo_change_mtu = enic_change_mtu,
1932 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
1933 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
1934 .ndo_tx_timeout = enic_tx_timeout,
1935 .ndo_set_vf_port = enic_set_vf_port,
1936 .ndo_get_vf_port = enic_get_vf_port,
1937 .ndo_set_vf_mac = enic_set_vf_mac,
1938#ifdef CONFIG_NET_POLL_CONTROLLER
1939 .ndo_poll_controller = enic_poll_controller,
1940#endif
1941};
1942
1943static void enic_dev_deinit(struct enic *enic)
1944{
1945 unsigned int i;
1946
1947 for (i = 0; i < enic->rq_count; i++)
1948 netif_napi_del(&enic->napi[i]);
1949
1950 enic_free_vnic_resources(enic);
1951 enic_clear_intr_mode(enic);
1952}
1953
1954static int enic_dev_init(struct enic *enic)
1955{
1956 struct device *dev = enic_get_dev(enic);
1957 struct net_device *netdev = enic->netdev;
1958 unsigned int i;
1959 int err;
1960
1961 /* Get interrupt coalesce timer info */
1962 err = enic_dev_intr_coal_timer_info(enic);
1963 if (err) {
1964 dev_warn(dev, "Using default conversion factor for "
1965 "interrupt coalesce timer\n");
1966 vnic_dev_intr_coal_timer_info_default(enic->vdev);
1967 }
1968
1969 /* Get vNIC configuration
1970 */
1971
1972 err = enic_get_vnic_config(enic);
1973 if (err) {
1974 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1975 return err;
1976 }
1977
1978 /* Get available resource counts
1979 */
1980
1981 enic_get_res_counts(enic);
1982
1983 /* Set interrupt mode based on resource counts and system
1984 * capabilities
1985 */
1986
1987 err = enic_set_intr_mode(enic);
1988 if (err) {
1989 dev_err(dev, "Failed to set intr mode based on resource "
1990 "counts and system capabilities, aborting\n");
1991 return err;
1992 }
1993
1994 /* Allocate and configure vNIC resources
1995 */
1996
1997 err = enic_alloc_vnic_resources(enic);
1998 if (err) {
1999 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2000 goto err_out_free_vnic_resources;
2001 }
2002
2003 enic_init_vnic_resources(enic);
2004
2005 err = enic_set_rss_nic_cfg(enic);
2006 if (err) {
2007 dev_err(dev, "Failed to config nic, aborting\n");
2008 goto err_out_free_vnic_resources;
2009 }
2010
2011 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2012 default:
2013 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2014 break;
2015 case VNIC_DEV_INTR_MODE_MSIX:
2016 for (i = 0; i < enic->rq_count; i++)
2017 netif_napi_add(netdev, &enic->napi[i],
2018 enic_poll_msix, 64);
2019 break;
2020 }
2021
2022 return 0;
2023
2024err_out_free_vnic_resources:
2025 enic_clear_intr_mode(enic);
2026 enic_free_vnic_resources(enic);
2027
2028 return err;
2029}
2030
2031static void enic_iounmap(struct enic *enic)
2032{
2033 unsigned int i;
2034
2035 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2036 if (enic->bar[i].vaddr)
2037 iounmap(enic->bar[i].vaddr);
2038}
2039
2040static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2041{
2042 struct device *dev = &pdev->dev;
2043 struct net_device *netdev;
2044 struct enic *enic;
2045 int using_dac = 0;
2046 unsigned int i;
2047 int err;
2048#ifdef CONFIG_PCI_IOV
2049 int pos = 0;
2050#endif
2051 int num_pps = 1;
2052
2053 /* Allocate net device structure and initialize. Private
2054 * instance data is initialized to zero.
2055 */
2056
2057 netdev = alloc_etherdev_mqs(sizeof(struct enic),
2058 ENIC_RQ_MAX, ENIC_WQ_MAX);
2059 if (!netdev)
2060 return -ENOMEM;
2061
2062 pci_set_drvdata(pdev, netdev);
2063
2064 SET_NETDEV_DEV(netdev, &pdev->dev);
2065
2066 enic = netdev_priv(netdev);
2067 enic->netdev = netdev;
2068 enic->pdev = pdev;
2069
2070 /* Setup PCI resources
2071 */
2072
2073 err = pci_enable_device_mem(pdev);
2074 if (err) {
2075 dev_err(dev, "Cannot enable PCI device, aborting\n");
2076 goto err_out_free_netdev;
2077 }
2078
2079 err = pci_request_regions(pdev, DRV_NAME);
2080 if (err) {
2081 dev_err(dev, "Cannot request PCI regions, aborting\n");
2082 goto err_out_disable_device;
2083 }
2084
2085 pci_set_master(pdev);
2086
2087 /* Query PCI controller on system for DMA addressing
2088 * limitation for the device. Try 64-bit first, and
2089 * fail to 32-bit.
2090 */
2091
2092 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2093 if (err) {
2094 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2095 if (err) {
2096 dev_err(dev, "No usable DMA configuration, aborting\n");
2097 goto err_out_release_regions;
2098 }
2099 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2100 if (err) {
2101 dev_err(dev, "Unable to obtain %u-bit DMA "
2102 "for consistent allocations, aborting\n", 32);
2103 goto err_out_release_regions;
2104 }
2105 } else {
2106 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2107 if (err) {
2108 dev_err(dev, "Unable to obtain %u-bit DMA "
2109 "for consistent allocations, aborting\n", 64);
2110 goto err_out_release_regions;
2111 }
2112 using_dac = 1;
2113 }
2114
2115 /* Map vNIC resources from BAR0-5
2116 */
2117
2118 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2119 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2120 continue;
2121 enic->bar[i].len = pci_resource_len(pdev, i);
2122 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2123 if (!enic->bar[i].vaddr) {
2124 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2125 err = -ENODEV;
2126 goto err_out_iounmap;
2127 }
2128 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2129 }
2130
2131 /* Register vNIC device
2132 */
2133
2134 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2135 ARRAY_SIZE(enic->bar));
2136 if (!enic->vdev) {
2137 dev_err(dev, "vNIC registration failed, aborting\n");
2138 err = -ENODEV;
2139 goto err_out_iounmap;
2140 }
2141
2142#ifdef CONFIG_PCI_IOV
2143 /* Get number of subvnics */
2144 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2145 if (pos) {
2146 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2147 &enic->num_vfs);
2148 if (enic->num_vfs) {
2149 err = pci_enable_sriov(pdev, enic->num_vfs);
2150 if (err) {
2151 dev_err(dev, "SRIOV enable failed, aborting."
2152 " pci_enable_sriov() returned %d\n",
2153 err);
2154 goto err_out_vnic_unregister;
2155 }
2156 enic->priv_flags |= ENIC_SRIOV_ENABLED;
2157 num_pps = enic->num_vfs;
2158 }
2159 }
2160#endif
2161
2162 /* Allocate structure for port profiles */
2163 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2164 if (!enic->pp) {
2165 err = -ENOMEM;
2166 goto err_out_disable_sriov_pp;
2167 }
2168
2169 /* Issue device open to get device in known state
2170 */
2171
2172 err = enic_dev_open(enic);
2173 if (err) {
2174 dev_err(dev, "vNIC dev open failed, aborting\n");
2175 goto err_out_disable_sriov;
2176 }
2177
2178 /* Setup devcmd lock
2179 */
2180
2181 spin_lock_init(&enic->devcmd_lock);
2182 spin_lock_init(&enic->enic_api_lock);
2183
2184 /*
2185 * Set ingress vlan rewrite mode before vnic initialization
2186 */
2187
2188 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2189 if (err) {
2190 dev_err(dev,
2191 "Failed to set ingress vlan rewrite mode, aborting.\n");
2192 goto err_out_dev_close;
2193 }
2194
2195 /* Issue device init to initialize the vnic-to-switch link.
2196 * We'll start with carrier off and wait for link UP
2197 * notification later to turn on carrier. We don't need
2198 * to wait here for the vnic-to-switch link initialization
2199 * to complete; link UP notification is the indication that
2200 * the process is complete.
2201 */
2202
2203 netif_carrier_off(netdev);
2204
2205 /* Do not call dev_init for a dynamic vnic.
2206 * For a dynamic vnic, init_prov_info will be
2207 * called later by an upper layer.
2208 */
2209
2210 if (!enic_is_dynamic(enic)) {
2211 err = vnic_dev_init(enic->vdev, 0);
2212 if (err) {
2213 dev_err(dev, "vNIC dev init failed, aborting\n");
2214 goto err_out_dev_close;
2215 }
2216 }
2217
2218 err = enic_dev_init(enic);
2219 if (err) {
2220 dev_err(dev, "Device initialization failed, aborting\n");
2221 goto err_out_dev_close;
2222 }
2223
2224 netif_set_real_num_tx_queues(netdev, enic->wq_count);
2225 netif_set_real_num_rx_queues(netdev, enic->rq_count);
2226
2227 /* Setup notification timer, HW reset task, and wq locks
2228 */
2229
2230 init_timer(&enic->notify_timer);
2231 enic->notify_timer.function = enic_notify_timer;
2232 enic->notify_timer.data = (unsigned long)enic;
2233
2234 INIT_WORK(&enic->reset, enic_reset);
2235 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2236
2237 for (i = 0; i < enic->wq_count; i++)
2238 spin_lock_init(&enic->wq_lock[i]);
2239
2240 /* Register net device
2241 */
2242
2243 enic->port_mtu = enic->config.mtu;
2244 (void)enic_change_mtu(netdev, enic->port_mtu);
2245
2246 err = enic_set_mac_addr(netdev, enic->mac_addr);
2247 if (err) {
2248 dev_err(dev, "Invalid MAC address, aborting\n");
2249 goto err_out_dev_deinit;
2250 }
2251
2252 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2253 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2254
2255 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2256 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2257 else
2258 netdev->netdev_ops = &enic_netdev_ops;
2259
2260 netdev->watchdog_timeo = 2 * HZ;
2261 enic_set_ethtool_ops(netdev);
2262
2263 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2264 if (ENIC_SETTING(enic, LOOP)) {
2265 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2266 enic->loop_enable = 1;
2267 enic->loop_tag = enic->config.loop_tag;
2268 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2269 }
2270 if (ENIC_SETTING(enic, TXCSUM))
2271 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2272 if (ENIC_SETTING(enic, TSO))
2273 netdev->hw_features |= NETIF_F_TSO |
2274 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2275 if (ENIC_SETTING(enic, RSS))
2276 netdev->hw_features |= NETIF_F_RXHASH;
2277 if (ENIC_SETTING(enic, RXCSUM))
2278 netdev->hw_features |= NETIF_F_RXCSUM;
2279
2280 netdev->features |= netdev->hw_features;
2281
2282 if (using_dac)
2283 netdev->features |= NETIF_F_HIGHDMA;
2284
2285 netdev->priv_flags |= IFF_UNICAST_FLT;
2286
2287 err = register_netdev(netdev);
2288 if (err) {
2289 dev_err(dev, "Cannot register net device, aborting\n");
2290 goto err_out_dev_deinit;
2291 }
2292
2293 return 0;
2294
2295err_out_dev_deinit:
2296 enic_dev_deinit(enic);
2297err_out_dev_close:
2298 vnic_dev_close(enic->vdev);
2299err_out_disable_sriov:
2300 kfree(enic->pp);
2301err_out_disable_sriov_pp:
2302#ifdef CONFIG_PCI_IOV
2303 if (enic_sriov_enabled(enic)) {
2304 pci_disable_sriov(pdev);
2305 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2306 }
2307err_out_vnic_unregister:
2308#endif
2309 vnic_dev_unregister(enic->vdev);
2310err_out_iounmap:
2311 enic_iounmap(enic);
2312err_out_release_regions:
2313 pci_release_regions(pdev);
2314err_out_disable_device:
2315 pci_disable_device(pdev);
2316err_out_free_netdev:
2317 free_netdev(netdev);
2318
2319 return err;
2320}
2321
2322static void enic_remove(struct pci_dev *pdev)
2323{
2324 struct net_device *netdev = pci_get_drvdata(pdev);
2325
2326 if (netdev) {
2327 struct enic *enic = netdev_priv(netdev);
2328
2329 cancel_work_sync(&enic->reset);
2330 cancel_work_sync(&enic->change_mtu_work);
2331 unregister_netdev(netdev);
2332 enic_dev_deinit(enic);
2333 vnic_dev_close(enic->vdev);
2334#ifdef CONFIG_PCI_IOV
2335 if (enic_sriov_enabled(enic)) {
2336 pci_disable_sriov(pdev);
2337 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2338 }
2339#endif
2340 kfree(enic->pp);
2341 vnic_dev_unregister(enic->vdev);
2342 enic_iounmap(enic);
2343 pci_release_regions(pdev);
2344 pci_disable_device(pdev);
2345 free_netdev(netdev);
2346 }
2347}
2348
2349static struct pci_driver enic_driver = {
2350 .name = DRV_NAME,
2351 .id_table = enic_id_table,
2352 .probe = enic_probe,
2353 .remove = enic_remove,
2354};
2355
2356static int __init enic_init_module(void)
2357{
2358 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2359
2360 return pci_register_driver(&enic_driver);
2361}
2362
2363static void __exit enic_cleanup_module(void)
2364{
2365 pci_unregister_driver(&enic_driver);
2366}
2367
2368module_init(enic_init_module);
2369module_exit(enic_cleanup_module);