net/enic: flow API for NICs with advanced filters enabled
[dpdk.git] / drivers / net / enic / enic_main.c
1 /*
2  * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
4  *
5  * Copyright (c) 2014, Cisco Systems, Inc.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  * POSSIBILITY OF SUCH DAMAGE.
32  *
33  */
34
35 #include <stdio.h>
36
37 #include <sys/stat.h>
38 #include <sys/mman.h>
39 #include <fcntl.h>
40 #include <libgen.h>
41
42 #include <rte_pci.h>
43 #include <rte_memzone.h>
44 #include <rte_malloc.h>
45 #include <rte_mbuf.h>
46 #include <rte_string_fns.h>
47 #include <rte_ethdev.h>
48
49 #include "enic_compat.h"
50 #include "enic.h"
51 #include "wq_enet_desc.h"
52 #include "rq_enet_desc.h"
53 #include "cq_enet_desc.h"
54 #include "vnic_enet.h"
55 #include "vnic_dev.h"
56 #include "vnic_wq.h"
57 #include "vnic_rq.h"
58 #include "vnic_cq.h"
59 #include "vnic_intr.h"
60 #include "vnic_nic.h"
61
62 static inline int enic_is_sriov_vf(struct enic *enic)
63 {
64         return enic->pdev->id.device_id == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
65 }
66
67 static int is_zero_addr(uint8_t *addr)
68 {
69         return !(addr[0] |  addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
70 }
71
72 static int is_mcast_addr(uint8_t *addr)
73 {
74         return addr[0] & 1;
75 }
76
77 static int is_eth_addr_valid(uint8_t *addr)
78 {
79         return !is_mcast_addr(addr) && !is_zero_addr(addr);
80 }
81
82 static void
83 enic_rxmbuf_queue_release(__rte_unused struct enic *enic, struct vnic_rq *rq)
84 {
85         uint16_t i;
86
87         if (!rq || !rq->mbuf_ring) {
88                 dev_debug(enic, "Pointer to rq or mbuf_ring is NULL");
89                 return;
90         }
91
92         for (i = 0; i < rq->ring.desc_count; i++) {
93                 if (rq->mbuf_ring[i]) {
94                         rte_pktmbuf_free_seg(rq->mbuf_ring[i]);
95                         rq->mbuf_ring[i] = NULL;
96                 }
97         }
98 }
99
100 void enic_set_hdr_split_size(struct enic *enic, u16 split_hdr_size)
101 {
102         vnic_set_hdr_split_size(enic->vdev, split_hdr_size);
103 }
104
105 static void enic_free_wq_buf(struct vnic_wq_buf *buf)
106 {
107         struct rte_mbuf *mbuf = (struct rte_mbuf *)buf->mb;
108
109         rte_pktmbuf_free_seg(mbuf);
110         buf->mb = NULL;
111 }
112
113 static void enic_log_q_error(struct enic *enic)
114 {
115         unsigned int i;
116         u32 error_status;
117
118         for (i = 0; i < enic->wq_count; i++) {
119                 error_status = vnic_wq_error_status(&enic->wq[i]);
120                 if (error_status)
121                         dev_err(enic, "WQ[%d] error_status %d\n", i,
122                                 error_status);
123         }
124
125         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
126                 if (!enic->rq[i].in_use)
127                         continue;
128                 error_status = vnic_rq_error_status(&enic->rq[i]);
129                 if (error_status)
130                         dev_err(enic, "RQ[%d] error_status %d\n", i,
131                                 error_status);
132         }
133 }
134
135 static void enic_clear_soft_stats(struct enic *enic)
136 {
137         struct enic_soft_stats *soft_stats = &enic->soft_stats;
138         rte_atomic64_clear(&soft_stats->rx_nombuf);
139         rte_atomic64_clear(&soft_stats->rx_packet_errors);
140         rte_atomic64_clear(&soft_stats->tx_oversized);
141 }
142
143 static void enic_init_soft_stats(struct enic *enic)
144 {
145         struct enic_soft_stats *soft_stats = &enic->soft_stats;
146         rte_atomic64_init(&soft_stats->rx_nombuf);
147         rte_atomic64_init(&soft_stats->rx_packet_errors);
148         rte_atomic64_init(&soft_stats->tx_oversized);
149         enic_clear_soft_stats(enic);
150 }
151
152 void enic_dev_stats_clear(struct enic *enic)
153 {
154         if (vnic_dev_stats_clear(enic->vdev))
155                 dev_err(enic, "Error in clearing stats\n");
156         enic_clear_soft_stats(enic);
157 }
158
159 void enic_dev_stats_get(struct enic *enic, struct rte_eth_stats *r_stats)
160 {
161         struct vnic_stats *stats;
162         struct enic_soft_stats *soft_stats = &enic->soft_stats;
163         int64_t rx_truncated;
164         uint64_t rx_packet_errors;
165
166         if (vnic_dev_stats_dump(enic->vdev, &stats)) {
167                 dev_err(enic, "Error in getting stats\n");
168                 return;
169         }
170
171         /* The number of truncated packets can only be calculated by
172          * subtracting a hardware counter from error packets received by
173          * the driver. Note: this causes transient inaccuracies in the
174          * ipackets count. Also, the length of truncated packets are
175          * counted in ibytes even though truncated packets are dropped
176          * which can make ibytes be slightly higher than it should be.
177          */
178         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
179         rx_truncated = rx_packet_errors - stats->rx.rx_errors;
180
181         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
182         r_stats->opackets = stats->tx.tx_frames_ok;
183
184         r_stats->ibytes = stats->rx.rx_bytes_ok;
185         r_stats->obytes = stats->tx.tx_bytes_ok;
186
187         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
188         r_stats->oerrors = stats->tx.tx_errors
189                            + rte_atomic64_read(&soft_stats->tx_oversized);
190
191         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
192
193         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
194 }
195
196 void enic_del_mac_address(struct enic *enic, int mac_index)
197 {
198         struct rte_eth_dev *eth_dev = enic->rte_dev;
199         uint8_t *mac_addr = eth_dev->data->mac_addrs[mac_index].addr_bytes;
200
201         if (vnic_dev_del_addr(enic->vdev, mac_addr))
202                 dev_err(enic, "del mac addr failed\n");
203 }
204
205 int enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
206 {
207         int err;
208
209         if (!is_eth_addr_valid(mac_addr)) {
210                 dev_err(enic, "invalid mac address\n");
211                 return -EINVAL;
212         }
213
214         err = vnic_dev_add_addr(enic->vdev, mac_addr);
215         if (err)
216                 dev_err(enic, "add mac addr failed\n");
217         return err;
218 }
219
220 static void
221 enic_free_rq_buf(struct rte_mbuf **mbuf)
222 {
223         if (*mbuf == NULL)
224                 return;
225
226         rte_pktmbuf_free(*mbuf);
227         mbuf = NULL;
228 }
229
230 void enic_init_vnic_resources(struct enic *enic)
231 {
232         unsigned int error_interrupt_enable = 1;
233         unsigned int error_interrupt_offset = 0;
234         unsigned int index = 0;
235         unsigned int cq_idx;
236         struct vnic_rq *data_rq;
237
238         for (index = 0; index < enic->rq_count; index++) {
239                 cq_idx = enic_cq_rq(enic, enic_rte_rq_idx_to_sop_idx(index));
240
241                 vnic_rq_init(&enic->rq[enic_rte_rq_idx_to_sop_idx(index)],
242                         cq_idx,
243                         error_interrupt_enable,
244                         error_interrupt_offset);
245
246                 data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(index)];
247                 if (data_rq->in_use)
248                         vnic_rq_init(data_rq,
249                                      cq_idx,
250                                      error_interrupt_enable,
251                                      error_interrupt_offset);
252
253                 vnic_cq_init(&enic->cq[cq_idx],
254                         0 /* flow_control_enable */,
255                         1 /* color_enable */,
256                         0 /* cq_head */,
257                         0 /* cq_tail */,
258                         1 /* cq_tail_color */,
259                         0 /* interrupt_enable */,
260                         1 /* cq_entry_enable */,
261                         0 /* cq_message_enable */,
262                         0 /* interrupt offset */,
263                         0 /* cq_message_addr */);
264         }
265
266         for (index = 0; index < enic->wq_count; index++) {
267                 vnic_wq_init(&enic->wq[index],
268                         enic_cq_wq(enic, index),
269                         error_interrupt_enable,
270                         error_interrupt_offset);
271
272                 cq_idx = enic_cq_wq(enic, index);
273                 vnic_cq_init(&enic->cq[cq_idx],
274                         0 /* flow_control_enable */,
275                         1 /* color_enable */,
276                         0 /* cq_head */,
277                         0 /* cq_tail */,
278                         1 /* cq_tail_color */,
279                         0 /* interrupt_enable */,
280                         0 /* cq_entry_enable */,
281                         1 /* cq_message_enable */,
282                         0 /* interrupt offset */,
283                         (u64)enic->wq[index].cqmsg_rz->phys_addr);
284         }
285
286         vnic_intr_init(&enic->intr,
287                 enic->config.intr_timer_usec,
288                 enic->config.intr_timer_type,
289                 /*mask_on_assertion*/1);
290 }
291
292
293 static int
294 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
295 {
296         struct rte_mbuf *mb;
297         struct rq_enet_desc *rqd = rq->ring.descs;
298         unsigned i;
299         dma_addr_t dma_addr;
300
301         if (!rq->in_use)
302                 return 0;
303
304         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
305                   rq->ring.desc_count);
306
307         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
308                 mb = rte_mbuf_raw_alloc(rq->mp);
309                 if (mb == NULL) {
310                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
311                         (unsigned)rq->index);
312                         return -ENOMEM;
313                 }
314
315                 mb->data_off = RTE_PKTMBUF_HEADROOM;
316                 dma_addr = (dma_addr_t)(mb->buf_physaddr
317                            + RTE_PKTMBUF_HEADROOM);
318                 rq_enet_desc_enc(rqd, dma_addr,
319                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
320                                 : RQ_ENET_TYPE_NOT_SOP),
321                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
322                 rq->mbuf_ring[i] = mb;
323         }
324
325         /* make sure all prior writes are complete before doing the PIO write */
326         rte_rmb();
327
328         /* Post all but the last buffer to VIC. */
329         rq->posted_index = rq->ring.desc_count - 1;
330
331         rq->rx_nb_hold = 0;
332
333         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
334                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
335         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
336         iowrite32(0, &rq->ctrl->fetch_index);
337         rte_rmb();
338
339         return 0;
340
341 }
342
343 static void *
344 enic_alloc_consistent(void *priv, size_t size,
345         dma_addr_t *dma_handle, u8 *name)
346 {
347         void *vaddr;
348         const struct rte_memzone *rz;
349         *dma_handle = 0;
350         struct enic *enic = (struct enic *)priv;
351         struct enic_memzone_entry *mze;
352
353         rz = rte_memzone_reserve_aligned((const char *)name,
354                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
355         if (!rz) {
356                 pr_err("%s : Failed to allocate memory requested for %s\n",
357                         __func__, name);
358                 return NULL;
359         }
360
361         vaddr = rz->addr;
362         *dma_handle = (dma_addr_t)rz->phys_addr;
363
364         mze = rte_malloc("enic memzone entry",
365                          sizeof(struct enic_memzone_entry), 0);
366
367         if (!mze) {
368                 pr_err("%s : Failed to allocate memory for memzone list\n",
369                        __func__);
370                 rte_memzone_free(rz);
371         }
372
373         mze->rz = rz;
374
375         rte_spinlock_lock(&enic->memzone_list_lock);
376         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
377         rte_spinlock_unlock(&enic->memzone_list_lock);
378
379         return vaddr;
380 }
381
382 static void
383 enic_free_consistent(void *priv,
384                      __rte_unused size_t size,
385                      void *vaddr,
386                      dma_addr_t dma_handle)
387 {
388         struct enic_memzone_entry *mze;
389         struct enic *enic = (struct enic *)priv;
390
391         rte_spinlock_lock(&enic->memzone_list_lock);
392         LIST_FOREACH(mze, &enic->memzone_list, entries) {
393                 if (mze->rz->addr == vaddr &&
394                     mze->rz->phys_addr == dma_handle)
395                         break;
396         }
397         if (mze == NULL) {
398                 rte_spinlock_unlock(&enic->memzone_list_lock);
399                 dev_warning(enic,
400                             "Tried to free memory, but couldn't find it in the memzone list\n");
401                 return;
402         }
403         LIST_REMOVE(mze, entries);
404         rte_spinlock_unlock(&enic->memzone_list_lock);
405         rte_memzone_free(mze->rz);
406         rte_free(mze);
407 }
408
409 int enic_link_update(struct enic *enic)
410 {
411         struct rte_eth_dev *eth_dev = enic->rte_dev;
412         int ret;
413         int link_status = 0;
414
415         link_status = enic_get_link_status(enic);
416         ret = (link_status == enic->link_status);
417         enic->link_status = link_status;
418         eth_dev->data->dev_link.link_status = link_status;
419         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
420         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
421         return ret;
422 }
423
424 static void
425 enic_intr_handler(void *arg)
426 {
427         struct rte_eth_dev *dev = (struct rte_eth_dev *)arg;
428         struct enic *enic = pmd_priv(dev);
429
430         vnic_intr_return_all_credits(&enic->intr);
431
432         enic_link_update(enic);
433         _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
434         enic_log_q_error(enic);
435 }
436
437 int enic_enable(struct enic *enic)
438 {
439         unsigned int index;
440         int err;
441         struct rte_eth_dev *eth_dev = enic->rte_dev;
442
443         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
444         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
445
446         /* vnic notification of link status has already been turned on in
447          * enic_dev_init() which is called during probe time.  Here we are
448          * just turning on interrupt vector 0 if needed.
449          */
450         if (eth_dev->data->dev_conf.intr_conf.lsc)
451                 vnic_dev_notify_set(enic->vdev, 0);
452
453         if (enic_clsf_init(enic))
454                 dev_warning(enic, "Init of hash table for clsf failed."\
455                         "Flow director feature will not work\n");
456
457         for (index = 0; index < enic->rq_count; index++) {
458                 err = enic_alloc_rx_queue_mbufs(enic,
459                         &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
460                 if (err) {
461                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
462                         return err;
463                 }
464                 err = enic_alloc_rx_queue_mbufs(enic,
465                         &enic->rq[enic_rte_rq_idx_to_data_idx(index)]);
466                 if (err) {
467                         /* release the allocated mbufs for the sop rq*/
468                         enic_rxmbuf_queue_release(enic,
469                                 &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
470
471                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
472                         return err;
473                 }
474         }
475
476         for (index = 0; index < enic->wq_count; index++)
477                 enic_start_wq(enic, index);
478         for (index = 0; index < enic->rq_count; index++)
479                 enic_start_rq(enic, index);
480
481         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
482
483         vnic_dev_enable_wait(enic->vdev);
484
485         /* Register and enable error interrupt */
486         rte_intr_callback_register(&(enic->pdev->intr_handle),
487                 enic_intr_handler, (void *)enic->rte_dev);
488
489         rte_intr_enable(&(enic->pdev->intr_handle));
490         vnic_intr_unmask(&enic->intr);
491
492         return 0;
493 }
494
495 int enic_alloc_intr_resources(struct enic *enic)
496 {
497         int err;
498
499         dev_info(enic, "vNIC resources used:  "\
500                 "wq %d rq %d cq %d intr %d\n",
501                 enic->wq_count, enic_vnic_rq_count(enic),
502                 enic->cq_count, enic->intr_count);
503
504         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
505         if (err)
506                 enic_free_vnic_resources(enic);
507
508         return err;
509 }
510
511 void enic_free_rq(void *rxq)
512 {
513         struct vnic_rq *rq_sop, *rq_data;
514         struct enic *enic;
515
516         if (rxq == NULL)
517                 return;
518
519         rq_sop = (struct vnic_rq *)rxq;
520         enic = vnic_dev_priv(rq_sop->vdev);
521         rq_data = &enic->rq[rq_sop->data_queue_idx];
522
523         enic_rxmbuf_queue_release(enic, rq_sop);
524         if (rq_data->in_use)
525                 enic_rxmbuf_queue_release(enic, rq_data);
526
527         rte_free(rq_sop->mbuf_ring);
528         if (rq_data->in_use)
529                 rte_free(rq_data->mbuf_ring);
530
531         rq_sop->mbuf_ring = NULL;
532         rq_data->mbuf_ring = NULL;
533
534         vnic_rq_free(rq_sop);
535         if (rq_data->in_use)
536                 vnic_rq_free(rq_data);
537
538         vnic_cq_free(&enic->cq[enic_sop_rq_idx_to_cq_idx(rq_sop->index)]);
539
540         rq_sop->in_use = 0;
541         rq_data->in_use = 0;
542 }
543
544 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
545 {
546         struct rte_eth_dev *eth_dev = enic->rte_dev;
547         vnic_wq_enable(&enic->wq[queue_idx]);
548         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
549 }
550
551 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
552 {
553         struct rte_eth_dev *eth_dev = enic->rte_dev;
554         int ret;
555
556         ret = vnic_wq_disable(&enic->wq[queue_idx]);
557         if (ret)
558                 return ret;
559
560         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
561         return 0;
562 }
563
564 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
565 {
566         struct vnic_rq *rq_sop;
567         struct vnic_rq *rq_data;
568         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
569         rq_data = &enic->rq[rq_sop->data_queue_idx];
570         struct rte_eth_dev *eth_dev = enic->rte_dev;
571
572         if (rq_data->in_use)
573                 vnic_rq_enable(rq_data);
574         rte_mb();
575         vnic_rq_enable(rq_sop);
576         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
577 }
578
579 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
580 {
581         int ret1 = 0, ret2 = 0;
582         struct rte_eth_dev *eth_dev = enic->rte_dev;
583         struct vnic_rq *rq_sop;
584         struct vnic_rq *rq_data;
585         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
586         rq_data = &enic->rq[rq_sop->data_queue_idx];
587
588         ret2 = vnic_rq_disable(rq_sop);
589         rte_mb();
590         if (rq_data->in_use)
591                 ret1 = vnic_rq_disable(rq_data);
592
593         if (ret2)
594                 return ret2;
595         else if (ret1)
596                 return ret1;
597
598         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
599         return 0;
600 }
601
602 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
603         unsigned int socket_id, struct rte_mempool *mp,
604         uint16_t nb_desc, uint16_t free_thresh)
605 {
606         int rc;
607         uint16_t sop_queue_idx = enic_rte_rq_idx_to_sop_idx(queue_idx);
608         uint16_t data_queue_idx = enic_rte_rq_idx_to_data_idx(queue_idx);
609         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
610         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
611         unsigned int mbuf_size, mbufs_per_pkt;
612         unsigned int nb_sop_desc, nb_data_desc;
613         uint16_t min_sop, max_sop, min_data, max_data;
614         uint16_t mtu = enic->rte_dev->data->mtu;
615
616         rq_sop->is_sop = 1;
617         rq_sop->data_queue_idx = data_queue_idx;
618         rq_data->is_sop = 0;
619         rq_data->data_queue_idx = 0;
620         rq_sop->socket_id = socket_id;
621         rq_sop->mp = mp;
622         rq_data->socket_id = socket_id;
623         rq_data->mp = mp;
624         rq_sop->in_use = 1;
625         rq_sop->rx_free_thresh = free_thresh;
626         rq_data->rx_free_thresh = free_thresh;
627         dev_debug(enic, "Set queue_id:%u free thresh:%u\n", queue_idx,
628                   free_thresh);
629
630         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
631                                RTE_PKTMBUF_HEADROOM);
632
633         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
634                 dev_info(enic, "Rq %u Scatter rx mode enabled\n", queue_idx);
635                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
636                 mbufs_per_pkt = ((mtu + ETHER_HDR_LEN + 4) +
637                                  (mbuf_size - 1)) / mbuf_size;
638         } else {
639                 dev_info(enic, "Scatter rx mode disabled\n");
640                 mbufs_per_pkt = 1;
641         }
642
643         if (mbufs_per_pkt > 1) {
644                 dev_info(enic, "Rq %u Scatter rx mode in use\n", queue_idx);
645                 rq_sop->data_queue_enable = 1;
646                 rq_data->in_use = 1;
647         } else {
648                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
649                          queue_idx);
650                 rq_sop->data_queue_enable = 0;
651                 rq_data->in_use = 0;
652         }
653
654         /* number of descriptors have to be a multiple of 32 */
655         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
656         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
657
658         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
659         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
660
661         if (mbufs_per_pkt > 1) {
662                 min_sop = 64;
663                 max_sop = ((enic->config.rq_desc_count /
664                             (mbufs_per_pkt - 1)) & ~0x1F);
665                 min_data = min_sop * (mbufs_per_pkt - 1);
666                 max_data = enic->config.rq_desc_count;
667         } else {
668                 min_sop = 64;
669                 max_sop = enic->config.rq_desc_count;
670                 min_data = 0;
671                 max_data = 0;
672         }
673
674         if (nb_desc < (min_sop + min_data)) {
675                 dev_warning(enic,
676                             "Number of rx descs too low, adjusting to minimum\n");
677                 nb_sop_desc = min_sop;
678                 nb_data_desc = min_data;
679         } else if (nb_desc > (max_sop + max_data)) {
680                 dev_warning(enic,
681                             "Number of rx_descs too high, adjusting to maximum\n");
682                 nb_sop_desc = max_sop;
683                 nb_data_desc = max_data;
684         }
685         if (mbufs_per_pkt > 1) {
686                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
687                          mtu, mbuf_size, min_sop + min_data,
688                          max_sop + max_data);
689         }
690         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
691                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
692
693         /* Allocate sop queue resources */
694         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
695                 nb_sop_desc, sizeof(struct rq_enet_desc));
696         if (rc) {
697                 dev_err(enic, "error in allocation of sop rq\n");
698                 goto err_exit;
699         }
700         nb_sop_desc = rq_sop->ring.desc_count;
701
702         if (rq_data->in_use) {
703                 /* Allocate data queue resources */
704                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
705                                    nb_data_desc,
706                                    sizeof(struct rq_enet_desc));
707                 if (rc) {
708                         dev_err(enic, "error in allocation of data rq\n");
709                         goto err_free_rq_sop;
710                 }
711                 nb_data_desc = rq_data->ring.desc_count;
712         }
713         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
714                            socket_id, nb_sop_desc + nb_data_desc,
715                            sizeof(struct cq_enet_rq_desc));
716         if (rc) {
717                 dev_err(enic, "error in allocation of cq for rq\n");
718                 goto err_free_rq_data;
719         }
720
721         /* Allocate the mbuf rings */
722         rq_sop->mbuf_ring = (struct rte_mbuf **)
723                 rte_zmalloc_socket("rq->mbuf_ring",
724                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
725                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
726         if (rq_sop->mbuf_ring == NULL)
727                 goto err_free_cq;
728
729         if (rq_data->in_use) {
730                 rq_data->mbuf_ring = (struct rte_mbuf **)
731                         rte_zmalloc_socket("rq->mbuf_ring",
732                                 sizeof(struct rte_mbuf *) * nb_data_desc,
733                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
734                 if (rq_data->mbuf_ring == NULL)
735                         goto err_free_sop_mbuf;
736         }
737
738         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
739
740         return 0;
741
742 err_free_sop_mbuf:
743         rte_free(rq_sop->mbuf_ring);
744 err_free_cq:
745         /* cleanup on error */
746         vnic_cq_free(&enic->cq[queue_idx]);
747 err_free_rq_data:
748         if (rq_data->in_use)
749                 vnic_rq_free(rq_data);
750 err_free_rq_sop:
751         vnic_rq_free(rq_sop);
752 err_exit:
753         return -ENOMEM;
754 }
755
756 void enic_free_wq(void *txq)
757 {
758         struct vnic_wq *wq;
759         struct enic *enic;
760
761         if (txq == NULL)
762                 return;
763
764         wq = (struct vnic_wq *)txq;
765         enic = vnic_dev_priv(wq->vdev);
766         rte_memzone_free(wq->cqmsg_rz);
767         vnic_wq_free(wq);
768         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
769 }
770
771 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
772         unsigned int socket_id, uint16_t nb_desc)
773 {
774         int err;
775         struct vnic_wq *wq = &enic->wq[queue_idx];
776         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
777         char name[NAME_MAX];
778         static int instance;
779
780         wq->socket_id = socket_id;
781         if (nb_desc) {
782                 if (nb_desc > enic->config.wq_desc_count) {
783                         dev_warning(enic,
784                                 "WQ %d - number of tx desc in cmd line (%d)"\
785                                 "is greater than that in the UCSM/CIMC adapter"\
786                                 "policy.  Applying the value in the adapter "\
787                                 "policy (%d)\n",
788                                 queue_idx, nb_desc, enic->config.wq_desc_count);
789                 } else if (nb_desc != enic->config.wq_desc_count) {
790                         enic->config.wq_desc_count = nb_desc;
791                         dev_info(enic,
792                                 "TX Queues - effective number of descs:%d\n",
793                                 nb_desc);
794                 }
795         }
796
797         /* Allocate queue resources */
798         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
799                 enic->config.wq_desc_count,
800                 sizeof(struct wq_enet_desc));
801         if (err) {
802                 dev_err(enic, "error in allocation of wq\n");
803                 return err;
804         }
805
806         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
807                 socket_id, enic->config.wq_desc_count,
808                 sizeof(struct cq_enet_wq_desc));
809         if (err) {
810                 vnic_wq_free(wq);
811                 dev_err(enic, "error in allocation of cq for wq\n");
812         }
813
814         /* setup up CQ message */
815         snprintf((char *)name, sizeof(name),
816                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
817                 instance++);
818
819         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
820                                                    sizeof(uint32_t),
821                                                    SOCKET_ID_ANY, 0,
822                                                    ENIC_ALIGN);
823         if (!wq->cqmsg_rz)
824                 return -ENOMEM;
825
826         return err;
827 }
828
829 int enic_disable(struct enic *enic)
830 {
831         unsigned int i;
832         int err;
833
834         vnic_intr_mask(&enic->intr);
835         (void)vnic_intr_masked(&enic->intr); /* flush write */
836         rte_intr_disable(&enic->pdev->intr_handle);
837         rte_intr_callback_unregister(&enic->pdev->intr_handle,
838                                      enic_intr_handler,
839                                      (void *)enic->rte_dev);
840
841         vnic_dev_disable(enic->vdev);
842
843         enic_clsf_destroy(enic);
844
845         if (!enic_is_sriov_vf(enic))
846                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
847
848         for (i = 0; i < enic->wq_count; i++) {
849                 err = vnic_wq_disable(&enic->wq[i]);
850                 if (err)
851                         return err;
852         }
853         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
854                 if (enic->rq[i].in_use) {
855                         err = vnic_rq_disable(&enic->rq[i]);
856                         if (err)
857                                 return err;
858                 }
859         }
860
861         /* If we were using interrupts, set the interrupt vector to -1
862          * to disable interrupts.  We are not disabling link notifcations,
863          * though, as we want the polling of link status to continue working.
864          */
865         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
866                 vnic_dev_notify_set(enic->vdev, -1);
867
868         vnic_dev_set_reset_flag(enic->vdev, 1);
869
870         for (i = 0; i < enic->wq_count; i++)
871                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
872
873         for (i = 0; i < enic_vnic_rq_count(enic); i++)
874                 if (enic->rq[i].in_use)
875                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
876         for (i = 0; i < enic->cq_count; i++)
877                 vnic_cq_clean(&enic->cq[i]);
878         vnic_intr_clean(&enic->intr);
879
880         return 0;
881 }
882
883 static int enic_dev_wait(struct vnic_dev *vdev,
884         int (*start)(struct vnic_dev *, int),
885         int (*finished)(struct vnic_dev *, int *),
886         int arg)
887 {
888         int done;
889         int err;
890         int i;
891
892         err = start(vdev, arg);
893         if (err)
894                 return err;
895
896         /* Wait for func to complete...2 seconds max */
897         for (i = 0; i < 2000; i++) {
898                 err = finished(vdev, &done);
899                 if (err)
900                         return err;
901                 if (done)
902                         return 0;
903                 usleep(1000);
904         }
905         return -ETIMEDOUT;
906 }
907
908 static int enic_dev_open(struct enic *enic)
909 {
910         int err;
911
912         err = enic_dev_wait(enic->vdev, vnic_dev_open,
913                 vnic_dev_open_done, 0);
914         if (err)
915                 dev_err(enic_get_dev(enic),
916                         "vNIC device open failed, err %d\n", err);
917
918         return err;
919 }
920
921 static int enic_set_rsskey(struct enic *enic)
922 {
923         dma_addr_t rss_key_buf_pa;
924         union vnic_rss_key *rss_key_buf_va = NULL;
925         static union vnic_rss_key rss_key = {
926                 .key = {
927                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
928                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
929                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
930                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
931                 }
932         };
933         int err;
934         u8 name[NAME_MAX];
935
936         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
937         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
938                 &rss_key_buf_pa, name);
939         if (!rss_key_buf_va)
940                 return -ENOMEM;
941
942         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
943
944         err = enic_set_rss_key(enic,
945                 rss_key_buf_pa,
946                 sizeof(union vnic_rss_key));
947
948         enic_free_consistent(enic, sizeof(union vnic_rss_key),
949                 rss_key_buf_va, rss_key_buf_pa);
950
951         return err;
952 }
953
954 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
955 {
956         dma_addr_t rss_cpu_buf_pa;
957         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
958         int i;
959         int err;
960         u8 name[NAME_MAX];
961
962         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
963         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
964                 &rss_cpu_buf_pa, name);
965         if (!rss_cpu_buf_va)
966                 return -ENOMEM;
967
968         for (i = 0; i < (1 << rss_hash_bits); i++)
969                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
970                         enic_rte_rq_idx_to_sop_idx(i % enic->rq_count);
971
972         err = enic_set_rss_cpu(enic,
973                 rss_cpu_buf_pa,
974                 sizeof(union vnic_rss_cpu));
975
976         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
977                 rss_cpu_buf_va, rss_cpu_buf_pa);
978
979         return err;
980 }
981
982 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
983         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
984 {
985         const u8 tso_ipid_split_en = 0;
986         int err;
987
988         /* Enable VLAN tag stripping */
989
990         err = enic_set_nic_cfg(enic,
991                 rss_default_cpu, rss_hash_type,
992                 rss_hash_bits, rss_base_cpu,
993                 rss_enable, tso_ipid_split_en,
994                 enic->ig_vlan_strip_en);
995
996         return err;
997 }
998
999 int enic_set_rss_nic_cfg(struct enic *enic)
1000 {
1001         const u8 rss_default_cpu = 0;
1002         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1003             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1004             NIC_CFG_RSS_HASH_TYPE_IPV6 |
1005             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1006         const u8 rss_hash_bits = 7;
1007         const u8 rss_base_cpu = 0;
1008         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1009
1010         if (rss_enable) {
1011                 if (!enic_set_rsskey(enic)) {
1012                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1013                                 rss_enable = 0;
1014                                 dev_warning(enic, "RSS disabled, "\
1015                                         "Failed to set RSS cpu indirection table.");
1016                         }
1017                 } else {
1018                         rss_enable = 0;
1019                         dev_warning(enic,
1020                                 "RSS disabled, Failed to set RSS key.\n");
1021                 }
1022         }
1023
1024         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1025                 rss_hash_bits, rss_base_cpu, rss_enable);
1026 }
1027
1028 int enic_setup_finish(struct enic *enic)
1029 {
1030         int ret;
1031
1032         enic_init_soft_stats(enic);
1033
1034         ret = enic_set_rss_nic_cfg(enic);
1035         if (ret) {
1036                 dev_err(enic, "Failed to config nic, aborting.\n");
1037                 return -1;
1038         }
1039
1040         /* Default conf */
1041         vnic_dev_packet_filter(enic->vdev,
1042                 1 /* directed  */,
1043                 1 /* multicast */,
1044                 1 /* broadcast */,
1045                 0 /* promisc   */,
1046                 1 /* allmulti  */);
1047
1048         enic->promisc = 0;
1049         enic->allmulti = 1;
1050
1051         return 0;
1052 }
1053
1054 void enic_add_packet_filter(struct enic *enic)
1055 {
1056         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1057         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1058                 enic->promisc, enic->allmulti);
1059 }
1060
1061 int enic_get_link_status(struct enic *enic)
1062 {
1063         return vnic_dev_link_status(enic->vdev);
1064 }
1065
1066 static void enic_dev_deinit(struct enic *enic)
1067 {
1068         struct rte_eth_dev *eth_dev = enic->rte_dev;
1069
1070         /* stop link status checking */
1071         vnic_dev_notify_unset(enic->vdev);
1072
1073         rte_free(eth_dev->data->mac_addrs);
1074 }
1075
1076
1077 int enic_set_vnic_res(struct enic *enic)
1078 {
1079         struct rte_eth_dev *eth_dev = enic->rte_dev;
1080         int rc = 0;
1081
1082         /* With Rx scatter support, two RQs are now used per RQ used by
1083          * the application.
1084          */
1085         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
1086                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1087                         eth_dev->data->nb_rx_queues,
1088                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1089                 rc = -EINVAL;
1090         }
1091         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
1092                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1093                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1094                 rc = -EINVAL;
1095         }
1096
1097         if (enic->conf_cq_count < (eth_dev->data->nb_rx_queues +
1098                                    eth_dev->data->nb_tx_queues)) {
1099                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1100                         (eth_dev->data->nb_rx_queues +
1101                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1102                 rc = -EINVAL;
1103         }
1104
1105         if (rc == 0) {
1106                 enic->rq_count = eth_dev->data->nb_rx_queues;
1107                 enic->wq_count = eth_dev->data->nb_tx_queues;
1108                 enic->cq_count = enic->rq_count + enic->wq_count;
1109         }
1110
1111         return rc;
1112 }
1113
1114 /* Initialize the completion queue for an RQ */
1115 static int
1116 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1117 {
1118         struct vnic_rq *sop_rq, *data_rq;
1119         unsigned int cq_idx = enic_cq_rq(enic, rq_idx);
1120         int rc = 0;
1121
1122         sop_rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1123         data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(rq_idx)];
1124
1125         vnic_cq_clean(&enic->cq[cq_idx]);
1126         vnic_cq_init(&enic->cq[cq_idx],
1127                      0 /* flow_control_enable */,
1128                      1 /* color_enable */,
1129                      0 /* cq_head */,
1130                      0 /* cq_tail */,
1131                      1 /* cq_tail_color */,
1132                      0 /* interrupt_enable */,
1133                      1 /* cq_entry_enable */,
1134                      0 /* cq_message_enable */,
1135                      0 /* interrupt offset */,
1136                      0 /* cq_message_addr */);
1137
1138
1139         vnic_rq_init_start(sop_rq, enic_cq_rq(enic,
1140                            enic_rte_rq_idx_to_sop_idx(rq_idx)), 0,
1141                            sop_rq->ring.desc_count - 1, 1, 0);
1142         if (data_rq->in_use) {
1143                 vnic_rq_init_start(data_rq,
1144                                    enic_cq_rq(enic,
1145                                    enic_rte_rq_idx_to_data_idx(rq_idx)), 0,
1146                                    data_rq->ring.desc_count - 1, 1, 0);
1147         }
1148
1149         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1150         if (rc)
1151                 return rc;
1152
1153         if (data_rq->in_use) {
1154                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1155                 if (rc) {
1156                         enic_rxmbuf_queue_release(enic, sop_rq);
1157                         return rc;
1158                 }
1159         }
1160
1161         return 0;
1162 }
1163
1164 /* The Cisco NIC can send and receive packets up to a max packet size
1165  * determined by the NIC type and firmware. There is also an MTU
1166  * configured into the NIC via the CIMC/UCSM management interface
1167  * which can be overridden by this function (up to the max packet size).
1168  * Depending on the network setup, doing so may cause packet drops
1169  * and unexpected behavior.
1170  */
1171 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1172 {
1173         unsigned int rq_idx;
1174         struct vnic_rq *rq;
1175         int rc = 0;
1176         uint16_t old_mtu;       /* previous setting */
1177         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1178         struct rte_eth_dev *eth_dev = enic->rte_dev;
1179
1180         old_mtu = eth_dev->data->mtu;
1181         config_mtu = enic->config.mtu;
1182
1183         if (new_mtu > enic->max_mtu) {
1184                 dev_err(enic,
1185                         "MTU not updated: requested (%u) greater than max (%u)\n",
1186                         new_mtu, enic->max_mtu);
1187                 return -EINVAL;
1188         }
1189         if (new_mtu < ENIC_MIN_MTU) {
1190                 dev_info(enic,
1191                         "MTU not updated: requested (%u) less than min (%u)\n",
1192                         new_mtu, ENIC_MIN_MTU);
1193                 return -EINVAL;
1194         }
1195         if (new_mtu > config_mtu)
1196                 dev_warning(enic,
1197                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1198                         new_mtu, config_mtu);
1199
1200         /* The easy case is when scatter is disabled. However if the MTU
1201          * becomes greater than the mbuf data size, packet drops will ensue.
1202          */
1203         if (!enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
1204                 eth_dev->data->mtu = new_mtu;
1205                 goto set_mtu_done;
1206         }
1207
1208         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1209          * change Rx scatter mode if necessary for better performance. I.e. if
1210          * MTU was greater than the mbuf size and now it's less, scatter Rx
1211          * doesn't have to be used and vice versa.
1212           */
1213         rte_spinlock_lock(&enic->mtu_lock);
1214
1215         /* Stop traffic on all RQs */
1216         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1217                 rq = &enic->rq[rq_idx];
1218                 if (rq->is_sop && rq->in_use) {
1219                         rc = enic_stop_rq(enic,
1220                                           enic_sop_rq_idx_to_rte_idx(rq_idx));
1221                         if (rc) {
1222                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1223                                 goto set_mtu_done;
1224                         }
1225                 }
1226         }
1227
1228         /* replace Rx funciton with a no-op to avoid getting stale pkts */
1229         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1230         rte_mb();
1231
1232         /* Allow time for threads to exit the real Rx function. */
1233         usleep(100000);
1234
1235         /* now it is safe to reconfigure the RQs */
1236
1237         /* update the mtu */
1238         eth_dev->data->mtu = new_mtu;
1239
1240         /* free and reallocate RQs with the new MTU */
1241         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1242                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1243
1244                 enic_free_rq(rq);
1245                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1246                                    rq->tot_nb_desc, rq->rx_free_thresh);
1247                 if (rc) {
1248                         dev_err(enic,
1249                                 "Fatal MTU alloc error- No traffic will pass\n");
1250                         goto set_mtu_done;
1251                 }
1252
1253                 rc = enic_reinit_rq(enic, rq_idx);
1254                 if (rc) {
1255                         dev_err(enic,
1256                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1257                         goto set_mtu_done;
1258                 }
1259         }
1260
1261         /* put back the real receive function */
1262         rte_mb();
1263         eth_dev->rx_pkt_burst = enic_recv_pkts;
1264         rte_mb();
1265
1266         /* restart Rx traffic */
1267         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1268                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1269                 if (rq->is_sop && rq->in_use)
1270                         enic_start_rq(enic, rq_idx);
1271         }
1272
1273 set_mtu_done:
1274         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1275         rte_spinlock_unlock(&enic->mtu_lock);
1276         return rc;
1277 }
1278
1279 static int enic_dev_init(struct enic *enic)
1280 {
1281         int err;
1282         struct rte_eth_dev *eth_dev = enic->rte_dev;
1283
1284         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1285
1286         /* Get vNIC configuration
1287         */
1288         err = enic_get_vnic_config(enic);
1289         if (err) {
1290                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1291                 return err;
1292         }
1293
1294         /* Get available resource counts */
1295         enic_get_res_counts(enic);
1296         if (enic->conf_rq_count == 1) {
1297                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1298                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1299                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1300                 return -EINVAL;
1301         }
1302
1303         /* Get the supported filters */
1304         enic_fdir_info(enic);
1305
1306         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN
1307                                                 * ENIC_MAX_MAC_ADDR, 0);
1308         if (!eth_dev->data->mac_addrs) {
1309                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1310                 return -1;
1311         }
1312         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1313                         eth_dev->data->mac_addrs);
1314
1315         vnic_dev_set_reset_flag(enic->vdev, 0);
1316
1317         LIST_INIT(&enic->flows);
1318         rte_spinlock_init(&enic->flows_lock);
1319
1320         /* set up link status checking */
1321         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1322
1323         return 0;
1324
1325 }
1326
1327 int enic_probe(struct enic *enic)
1328 {
1329         struct rte_pci_device *pdev = enic->pdev;
1330         int err = -1;
1331
1332         dev_debug(enic, " Initializing ENIC PMD\n");
1333
1334         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1335         enic->bar0.len = pdev->mem_resource[0].len;
1336
1337         /* Register vNIC device */
1338         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1339         if (!enic->vdev) {
1340                 dev_err(enic, "vNIC registration failed, aborting\n");
1341                 goto err_out;
1342         }
1343
1344         LIST_INIT(&enic->memzone_list);
1345         rte_spinlock_init(&enic->memzone_list_lock);
1346
1347         vnic_register_cbacks(enic->vdev,
1348                 enic_alloc_consistent,
1349                 enic_free_consistent);
1350
1351         /* Issue device open to get device in known state */
1352         err = enic_dev_open(enic);
1353         if (err) {
1354                 dev_err(enic, "vNIC dev open failed, aborting\n");
1355                 goto err_out_unregister;
1356         }
1357
1358         /* Set ingress vlan rewrite mode before vnic initialization */
1359         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1360                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1361         if (err) {
1362                 dev_err(enic,
1363                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1364                 goto err_out_dev_close;
1365         }
1366
1367         /* Issue device init to initialize the vnic-to-switch link.
1368          * We'll start with carrier off and wait for link UP
1369          * notification later to turn on carrier.  We don't need
1370          * to wait here for the vnic-to-switch link initialization
1371          * to complete; link UP notification is the indication that
1372          * the process is complete.
1373          */
1374
1375         err = vnic_dev_init(enic->vdev, 0);
1376         if (err) {
1377                 dev_err(enic, "vNIC dev init failed, aborting\n");
1378                 goto err_out_dev_close;
1379         }
1380
1381         err = enic_dev_init(enic);
1382         if (err) {
1383                 dev_err(enic, "Device initialization failed, aborting\n");
1384                 goto err_out_dev_close;
1385         }
1386
1387         return 0;
1388
1389 err_out_dev_close:
1390         vnic_dev_close(enic->vdev);
1391 err_out_unregister:
1392         vnic_dev_unregister(enic->vdev);
1393 err_out:
1394         return err;
1395 }
1396
1397 void enic_remove(struct enic *enic)
1398 {
1399         enic_dev_deinit(enic);
1400         vnic_dev_close(enic->vdev);
1401         vnic_dev_unregister(enic->vdev);
1402 }