79326050434670a8881c8c53455ce5e213f40674
[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 int 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         int ret = vnic_dev_stats_dump(enic->vdev, &stats);
166
167         if (ret) {
168                 dev_err(enic, "Error in getting stats\n");
169                 return ret;
170         }
171
172         /* The number of truncated packets can only be calculated by
173          * subtracting a hardware counter from error packets received by
174          * the driver. Note: this causes transient inaccuracies in the
175          * ipackets count. Also, the length of truncated packets are
176          * counted in ibytes even though truncated packets are dropped
177          * which can make ibytes be slightly higher than it should be.
178          */
179         rx_packet_errors = rte_atomic64_read(&soft_stats->rx_packet_errors);
180         rx_truncated = rx_packet_errors - stats->rx.rx_errors;
181
182         r_stats->ipackets = stats->rx.rx_frames_ok - rx_truncated;
183         r_stats->opackets = stats->tx.tx_frames_ok;
184
185         r_stats->ibytes = stats->rx.rx_bytes_ok;
186         r_stats->obytes = stats->tx.tx_bytes_ok;
187
188         r_stats->ierrors = stats->rx.rx_errors + stats->rx.rx_drop;
189         r_stats->oerrors = stats->tx.tx_errors
190                            + rte_atomic64_read(&soft_stats->tx_oversized);
191
192         r_stats->imissed = stats->rx.rx_no_bufs + rx_truncated;
193
194         r_stats->rx_nombuf = rte_atomic64_read(&soft_stats->rx_nombuf);
195         return 0;
196 }
197
198 void enic_del_mac_address(struct enic *enic, int mac_index)
199 {
200         struct rte_eth_dev *eth_dev = enic->rte_dev;
201         uint8_t *mac_addr = eth_dev->data->mac_addrs[mac_index].addr_bytes;
202
203         if (vnic_dev_del_addr(enic->vdev, mac_addr))
204                 dev_err(enic, "del mac addr failed\n");
205 }
206
207 int enic_set_mac_address(struct enic *enic, uint8_t *mac_addr)
208 {
209         int err;
210
211         if (!is_eth_addr_valid(mac_addr)) {
212                 dev_err(enic, "invalid mac address\n");
213                 return -EINVAL;
214         }
215
216         err = vnic_dev_add_addr(enic->vdev, mac_addr);
217         if (err)
218                 dev_err(enic, "add mac addr failed\n");
219         return err;
220 }
221
222 static void
223 enic_free_rq_buf(struct rte_mbuf **mbuf)
224 {
225         if (*mbuf == NULL)
226                 return;
227
228         rte_pktmbuf_free(*mbuf);
229         *mbuf = NULL;
230 }
231
232 void enic_init_vnic_resources(struct enic *enic)
233 {
234         unsigned int error_interrupt_enable = 1;
235         unsigned int error_interrupt_offset = 0;
236         unsigned int index = 0;
237         unsigned int cq_idx;
238         struct vnic_rq *data_rq;
239
240         for (index = 0; index < enic->rq_count; index++) {
241                 cq_idx = enic_cq_rq(enic, enic_rte_rq_idx_to_sop_idx(index));
242
243                 vnic_rq_init(&enic->rq[enic_rte_rq_idx_to_sop_idx(index)],
244                         cq_idx,
245                         error_interrupt_enable,
246                         error_interrupt_offset);
247
248                 data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(index)];
249                 if (data_rq->in_use)
250                         vnic_rq_init(data_rq,
251                                      cq_idx,
252                                      error_interrupt_enable,
253                                      error_interrupt_offset);
254
255                 vnic_cq_init(&enic->cq[cq_idx],
256                         0 /* flow_control_enable */,
257                         1 /* color_enable */,
258                         0 /* cq_head */,
259                         0 /* cq_tail */,
260                         1 /* cq_tail_color */,
261                         0 /* interrupt_enable */,
262                         1 /* cq_entry_enable */,
263                         0 /* cq_message_enable */,
264                         0 /* interrupt offset */,
265                         0 /* cq_message_addr */);
266         }
267
268         for (index = 0; index < enic->wq_count; index++) {
269                 vnic_wq_init(&enic->wq[index],
270                         enic_cq_wq(enic, index),
271                         error_interrupt_enable,
272                         error_interrupt_offset);
273
274                 cq_idx = enic_cq_wq(enic, index);
275                 vnic_cq_init(&enic->cq[cq_idx],
276                         0 /* flow_control_enable */,
277                         1 /* color_enable */,
278                         0 /* cq_head */,
279                         0 /* cq_tail */,
280                         1 /* cq_tail_color */,
281                         0 /* interrupt_enable */,
282                         0 /* cq_entry_enable */,
283                         1 /* cq_message_enable */,
284                         0 /* interrupt offset */,
285                         (u64)enic->wq[index].cqmsg_rz->phys_addr);
286         }
287
288         vnic_intr_init(&enic->intr,
289                 enic->config.intr_timer_usec,
290                 enic->config.intr_timer_type,
291                 /*mask_on_assertion*/1);
292 }
293
294
295 static int
296 enic_alloc_rx_queue_mbufs(struct enic *enic, struct vnic_rq *rq)
297 {
298         struct rte_mbuf *mb;
299         struct rq_enet_desc *rqd = rq->ring.descs;
300         unsigned i;
301         dma_addr_t dma_addr;
302
303         if (!rq->in_use)
304                 return 0;
305
306         dev_debug(enic, "queue %u, allocating %u rx queue mbufs\n", rq->index,
307                   rq->ring.desc_count);
308
309         for (i = 0; i < rq->ring.desc_count; i++, rqd++) {
310                 mb = rte_mbuf_raw_alloc(rq->mp);
311                 if (mb == NULL) {
312                         dev_err(enic, "RX mbuf alloc failed queue_id=%u\n",
313                         (unsigned)rq->index);
314                         return -ENOMEM;
315                 }
316
317                 mb->data_off = RTE_PKTMBUF_HEADROOM;
318                 dma_addr = (dma_addr_t)(mb->buf_physaddr
319                            + RTE_PKTMBUF_HEADROOM);
320                 rq_enet_desc_enc(rqd, dma_addr,
321                                 (rq->is_sop ? RQ_ENET_TYPE_ONLY_SOP
322                                 : RQ_ENET_TYPE_NOT_SOP),
323                                 mb->buf_len - RTE_PKTMBUF_HEADROOM);
324                 rq->mbuf_ring[i] = mb;
325         }
326
327         /* make sure all prior writes are complete before doing the PIO write */
328         rte_rmb();
329
330         /* Post all but the last buffer to VIC. */
331         rq->posted_index = rq->ring.desc_count - 1;
332
333         rq->rx_nb_hold = 0;
334
335         dev_debug(enic, "port=%u, qidx=%u, Write %u posted idx, %u sw held\n",
336                 enic->port_id, rq->index, rq->posted_index, rq->rx_nb_hold);
337         iowrite32(rq->posted_index, &rq->ctrl->posted_index);
338         iowrite32(0, &rq->ctrl->fetch_index);
339         rte_rmb();
340
341         return 0;
342
343 }
344
345 static void *
346 enic_alloc_consistent(void *priv, size_t size,
347         dma_addr_t *dma_handle, u8 *name)
348 {
349         void *vaddr;
350         const struct rte_memzone *rz;
351         *dma_handle = 0;
352         struct enic *enic = (struct enic *)priv;
353         struct enic_memzone_entry *mze;
354
355         rz = rte_memzone_reserve_aligned((const char *)name,
356                                          size, SOCKET_ID_ANY, 0, ENIC_ALIGN);
357         if (!rz) {
358                 pr_err("%s : Failed to allocate memory requested for %s\n",
359                         __func__, name);
360                 return NULL;
361         }
362
363         vaddr = rz->addr;
364         *dma_handle = (dma_addr_t)rz->phys_addr;
365
366         mze = rte_malloc("enic memzone entry",
367                          sizeof(struct enic_memzone_entry), 0);
368
369         if (!mze) {
370                 pr_err("%s : Failed to allocate memory for memzone list\n",
371                        __func__);
372                 rte_memzone_free(rz);
373                 return NULL;
374         }
375
376         mze->rz = rz;
377
378         rte_spinlock_lock(&enic->memzone_list_lock);
379         LIST_INSERT_HEAD(&enic->memzone_list, mze, entries);
380         rte_spinlock_unlock(&enic->memzone_list_lock);
381
382         return vaddr;
383 }
384
385 static void
386 enic_free_consistent(void *priv,
387                      __rte_unused size_t size,
388                      void *vaddr,
389                      dma_addr_t dma_handle)
390 {
391         struct enic_memzone_entry *mze;
392         struct enic *enic = (struct enic *)priv;
393
394         rte_spinlock_lock(&enic->memzone_list_lock);
395         LIST_FOREACH(mze, &enic->memzone_list, entries) {
396                 if (mze->rz->addr == vaddr &&
397                     mze->rz->phys_addr == dma_handle)
398                         break;
399         }
400         if (mze == NULL) {
401                 rte_spinlock_unlock(&enic->memzone_list_lock);
402                 dev_warning(enic,
403                             "Tried to free memory, but couldn't find it in the memzone list\n");
404                 return;
405         }
406         LIST_REMOVE(mze, entries);
407         rte_spinlock_unlock(&enic->memzone_list_lock);
408         rte_memzone_free(mze->rz);
409         rte_free(mze);
410 }
411
412 int enic_link_update(struct enic *enic)
413 {
414         struct rte_eth_dev *eth_dev = enic->rte_dev;
415         int ret;
416         int link_status = 0;
417
418         link_status = enic_get_link_status(enic);
419         ret = (link_status == enic->link_status);
420         enic->link_status = link_status;
421         eth_dev->data->dev_link.link_status = link_status;
422         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
423         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
424         return ret;
425 }
426
427 static void
428 enic_intr_handler(void *arg)
429 {
430         struct rte_eth_dev *dev = (struct rte_eth_dev *)arg;
431         struct enic *enic = pmd_priv(dev);
432
433         vnic_intr_return_all_credits(&enic->intr);
434
435         enic_link_update(enic);
436         _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
437         enic_log_q_error(enic);
438 }
439
440 int enic_enable(struct enic *enic)
441 {
442         unsigned int index;
443         int err;
444         struct rte_eth_dev *eth_dev = enic->rte_dev;
445
446         eth_dev->data->dev_link.link_speed = vnic_dev_port_speed(enic->vdev);
447         eth_dev->data->dev_link.link_duplex = ETH_LINK_FULL_DUPLEX;
448
449         /* vnic notification of link status has already been turned on in
450          * enic_dev_init() which is called during probe time.  Here we are
451          * just turning on interrupt vector 0 if needed.
452          */
453         if (eth_dev->data->dev_conf.intr_conf.lsc)
454                 vnic_dev_notify_set(enic->vdev, 0);
455
456         if (enic_clsf_init(enic))
457                 dev_warning(enic, "Init of hash table for clsf failed."\
458                         "Flow director feature will not work\n");
459
460         for (index = 0; index < enic->rq_count; index++) {
461                 err = enic_alloc_rx_queue_mbufs(enic,
462                         &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
463                 if (err) {
464                         dev_err(enic, "Failed to alloc sop RX queue mbufs\n");
465                         return err;
466                 }
467                 err = enic_alloc_rx_queue_mbufs(enic,
468                         &enic->rq[enic_rte_rq_idx_to_data_idx(index)]);
469                 if (err) {
470                         /* release the allocated mbufs for the sop rq*/
471                         enic_rxmbuf_queue_release(enic,
472                                 &enic->rq[enic_rte_rq_idx_to_sop_idx(index)]);
473
474                         dev_err(enic, "Failed to alloc data RX queue mbufs\n");
475                         return err;
476                 }
477         }
478
479         for (index = 0; index < enic->wq_count; index++)
480                 enic_start_wq(enic, index);
481         for (index = 0; index < enic->rq_count; index++)
482                 enic_start_rq(enic, index);
483
484         vnic_dev_add_addr(enic->vdev, enic->mac_addr);
485
486         vnic_dev_enable_wait(enic->vdev);
487
488         /* Register and enable error interrupt */
489         rte_intr_callback_register(&(enic->pdev->intr_handle),
490                 enic_intr_handler, (void *)enic->rte_dev);
491
492         rte_intr_enable(&(enic->pdev->intr_handle));
493         vnic_intr_unmask(&enic->intr);
494
495         return 0;
496 }
497
498 int enic_alloc_intr_resources(struct enic *enic)
499 {
500         int err;
501
502         dev_info(enic, "vNIC resources used:  "\
503                 "wq %d rq %d cq %d intr %d\n",
504                 enic->wq_count, enic_vnic_rq_count(enic),
505                 enic->cq_count, enic->intr_count);
506
507         err = vnic_intr_alloc(enic->vdev, &enic->intr, 0);
508         if (err)
509                 enic_free_vnic_resources(enic);
510
511         return err;
512 }
513
514 void enic_free_rq(void *rxq)
515 {
516         struct vnic_rq *rq_sop, *rq_data;
517         struct enic *enic;
518
519         if (rxq == NULL)
520                 return;
521
522         rq_sop = (struct vnic_rq *)rxq;
523         enic = vnic_dev_priv(rq_sop->vdev);
524         rq_data = &enic->rq[rq_sop->data_queue_idx];
525
526         enic_rxmbuf_queue_release(enic, rq_sop);
527         if (rq_data->in_use)
528                 enic_rxmbuf_queue_release(enic, rq_data);
529
530         rte_free(rq_sop->mbuf_ring);
531         if (rq_data->in_use)
532                 rte_free(rq_data->mbuf_ring);
533
534         rq_sop->mbuf_ring = NULL;
535         rq_data->mbuf_ring = NULL;
536
537         vnic_rq_free(rq_sop);
538         if (rq_data->in_use)
539                 vnic_rq_free(rq_data);
540
541         vnic_cq_free(&enic->cq[enic_sop_rq_idx_to_cq_idx(rq_sop->index)]);
542
543         rq_sop->in_use = 0;
544         rq_data->in_use = 0;
545 }
546
547 void enic_start_wq(struct enic *enic, uint16_t queue_idx)
548 {
549         struct rte_eth_dev *eth_dev = enic->rte_dev;
550         vnic_wq_enable(&enic->wq[queue_idx]);
551         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
552 }
553
554 int enic_stop_wq(struct enic *enic, uint16_t queue_idx)
555 {
556         struct rte_eth_dev *eth_dev = enic->rte_dev;
557         int ret;
558
559         ret = vnic_wq_disable(&enic->wq[queue_idx]);
560         if (ret)
561                 return ret;
562
563         eth_dev->data->tx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
564         return 0;
565 }
566
567 void enic_start_rq(struct enic *enic, uint16_t queue_idx)
568 {
569         struct vnic_rq *rq_sop;
570         struct vnic_rq *rq_data;
571         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
572         rq_data = &enic->rq[rq_sop->data_queue_idx];
573         struct rte_eth_dev *eth_dev = enic->rte_dev;
574
575         if (rq_data->in_use)
576                 vnic_rq_enable(rq_data);
577         rte_mb();
578         vnic_rq_enable(rq_sop);
579         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STARTED;
580 }
581
582 int enic_stop_rq(struct enic *enic, uint16_t queue_idx)
583 {
584         int ret1 = 0, ret2 = 0;
585         struct rte_eth_dev *eth_dev = enic->rte_dev;
586         struct vnic_rq *rq_sop;
587         struct vnic_rq *rq_data;
588         rq_sop = &enic->rq[enic_rte_rq_idx_to_sop_idx(queue_idx)];
589         rq_data = &enic->rq[rq_sop->data_queue_idx];
590
591         ret2 = vnic_rq_disable(rq_sop);
592         rte_mb();
593         if (rq_data->in_use)
594                 ret1 = vnic_rq_disable(rq_data);
595
596         if (ret2)
597                 return ret2;
598         else if (ret1)
599                 return ret1;
600
601         eth_dev->data->rx_queue_state[queue_idx] = RTE_ETH_QUEUE_STATE_STOPPED;
602         return 0;
603 }
604
605 int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
606         unsigned int socket_id, struct rte_mempool *mp,
607         uint16_t nb_desc, uint16_t free_thresh)
608 {
609         int rc;
610         uint16_t sop_queue_idx = enic_rte_rq_idx_to_sop_idx(queue_idx);
611         uint16_t data_queue_idx = enic_rte_rq_idx_to_data_idx(queue_idx);
612         struct vnic_rq *rq_sop = &enic->rq[sop_queue_idx];
613         struct vnic_rq *rq_data = &enic->rq[data_queue_idx];
614         unsigned int mbuf_size, mbufs_per_pkt;
615         unsigned int nb_sop_desc, nb_data_desc;
616         uint16_t min_sop, max_sop, min_data, max_data;
617         uint16_t mtu = enic->rte_dev->data->mtu;
618
619         rq_sop->is_sop = 1;
620         rq_sop->data_queue_idx = data_queue_idx;
621         rq_data->is_sop = 0;
622         rq_data->data_queue_idx = 0;
623         rq_sop->socket_id = socket_id;
624         rq_sop->mp = mp;
625         rq_data->socket_id = socket_id;
626         rq_data->mp = mp;
627         rq_sop->in_use = 1;
628         rq_sop->rx_free_thresh = free_thresh;
629         rq_data->rx_free_thresh = free_thresh;
630         dev_debug(enic, "Set queue_id:%u free thresh:%u\n", queue_idx,
631                   free_thresh);
632
633         mbuf_size = (uint16_t)(rte_pktmbuf_data_room_size(mp) -
634                                RTE_PKTMBUF_HEADROOM);
635
636         if (enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
637                 dev_info(enic, "Rq %u Scatter rx mode enabled\n", queue_idx);
638                 /* ceil((mtu + ETHER_HDR_LEN + 4)/mbuf_size) */
639                 mbufs_per_pkt = ((mtu + ETHER_HDR_LEN + 4) +
640                                  (mbuf_size - 1)) / mbuf_size;
641         } else {
642                 dev_info(enic, "Scatter rx mode disabled\n");
643                 mbufs_per_pkt = 1;
644         }
645
646         if (mbufs_per_pkt > 1) {
647                 dev_info(enic, "Rq %u Scatter rx mode in use\n", queue_idx);
648                 rq_sop->data_queue_enable = 1;
649                 rq_data->in_use = 1;
650         } else {
651                 dev_info(enic, "Rq %u Scatter rx mode not being used\n",
652                          queue_idx);
653                 rq_sop->data_queue_enable = 0;
654                 rq_data->in_use = 0;
655         }
656
657         /* number of descriptors have to be a multiple of 32 */
658         nb_sop_desc = (nb_desc / mbufs_per_pkt) & ~0x1F;
659         nb_data_desc = (nb_desc - nb_sop_desc) & ~0x1F;
660
661         rq_sop->max_mbufs_per_pkt = mbufs_per_pkt;
662         rq_data->max_mbufs_per_pkt = mbufs_per_pkt;
663
664         if (mbufs_per_pkt > 1) {
665                 min_sop = 64;
666                 max_sop = ((enic->config.rq_desc_count /
667                             (mbufs_per_pkt - 1)) & ~0x1F);
668                 min_data = min_sop * (mbufs_per_pkt - 1);
669                 max_data = enic->config.rq_desc_count;
670         } else {
671                 min_sop = 64;
672                 max_sop = enic->config.rq_desc_count;
673                 min_data = 0;
674                 max_data = 0;
675         }
676
677         if (nb_desc < (min_sop + min_data)) {
678                 dev_warning(enic,
679                             "Number of rx descs too low, adjusting to minimum\n");
680                 nb_sop_desc = min_sop;
681                 nb_data_desc = min_data;
682         } else if (nb_desc > (max_sop + max_data)) {
683                 dev_warning(enic,
684                             "Number of rx_descs too high, adjusting to maximum\n");
685                 nb_sop_desc = max_sop;
686                 nb_data_desc = max_data;
687         }
688         if (mbufs_per_pkt > 1) {
689                 dev_info(enic, "For mtu %d and mbuf size %d valid rx descriptor range is %d to %d\n",
690                          mtu, mbuf_size, min_sop + min_data,
691                          max_sop + max_data);
692         }
693         dev_info(enic, "Using %d rx descriptors (sop %d, data %d)\n",
694                  nb_sop_desc + nb_data_desc, nb_sop_desc, nb_data_desc);
695
696         /* Allocate sop queue resources */
697         rc = vnic_rq_alloc(enic->vdev, rq_sop, sop_queue_idx,
698                 nb_sop_desc, sizeof(struct rq_enet_desc));
699         if (rc) {
700                 dev_err(enic, "error in allocation of sop rq\n");
701                 goto err_exit;
702         }
703         nb_sop_desc = rq_sop->ring.desc_count;
704
705         if (rq_data->in_use) {
706                 /* Allocate data queue resources */
707                 rc = vnic_rq_alloc(enic->vdev, rq_data, data_queue_idx,
708                                    nb_data_desc,
709                                    sizeof(struct rq_enet_desc));
710                 if (rc) {
711                         dev_err(enic, "error in allocation of data rq\n");
712                         goto err_free_rq_sop;
713                 }
714                 nb_data_desc = rq_data->ring.desc_count;
715         }
716         rc = vnic_cq_alloc(enic->vdev, &enic->cq[queue_idx], queue_idx,
717                            socket_id, nb_sop_desc + nb_data_desc,
718                            sizeof(struct cq_enet_rq_desc));
719         if (rc) {
720                 dev_err(enic, "error in allocation of cq for rq\n");
721                 goto err_free_rq_data;
722         }
723
724         /* Allocate the mbuf rings */
725         rq_sop->mbuf_ring = (struct rte_mbuf **)
726                 rte_zmalloc_socket("rq->mbuf_ring",
727                                    sizeof(struct rte_mbuf *) * nb_sop_desc,
728                                    RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
729         if (rq_sop->mbuf_ring == NULL)
730                 goto err_free_cq;
731
732         if (rq_data->in_use) {
733                 rq_data->mbuf_ring = (struct rte_mbuf **)
734                         rte_zmalloc_socket("rq->mbuf_ring",
735                                 sizeof(struct rte_mbuf *) * nb_data_desc,
736                                 RTE_CACHE_LINE_SIZE, rq_sop->socket_id);
737                 if (rq_data->mbuf_ring == NULL)
738                         goto err_free_sop_mbuf;
739         }
740
741         rq_sop->tot_nb_desc = nb_desc; /* squirl away for MTU update function */
742
743         return 0;
744
745 err_free_sop_mbuf:
746         rte_free(rq_sop->mbuf_ring);
747 err_free_cq:
748         /* cleanup on error */
749         vnic_cq_free(&enic->cq[queue_idx]);
750 err_free_rq_data:
751         if (rq_data->in_use)
752                 vnic_rq_free(rq_data);
753 err_free_rq_sop:
754         vnic_rq_free(rq_sop);
755 err_exit:
756         return -ENOMEM;
757 }
758
759 void enic_free_wq(void *txq)
760 {
761         struct vnic_wq *wq;
762         struct enic *enic;
763
764         if (txq == NULL)
765                 return;
766
767         wq = (struct vnic_wq *)txq;
768         enic = vnic_dev_priv(wq->vdev);
769         rte_memzone_free(wq->cqmsg_rz);
770         vnic_wq_free(wq);
771         vnic_cq_free(&enic->cq[enic->rq_count + wq->index]);
772 }
773
774 int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
775         unsigned int socket_id, uint16_t nb_desc)
776 {
777         int err;
778         struct vnic_wq *wq = &enic->wq[queue_idx];
779         unsigned int cq_index = enic_cq_wq(enic, queue_idx);
780         char name[NAME_MAX];
781         static int instance;
782
783         wq->socket_id = socket_id;
784         if (nb_desc) {
785                 if (nb_desc > enic->config.wq_desc_count) {
786                         dev_warning(enic,
787                                 "WQ %d - number of tx desc in cmd line (%d)"\
788                                 "is greater than that in the UCSM/CIMC adapter"\
789                                 "policy.  Applying the value in the adapter "\
790                                 "policy (%d)\n",
791                                 queue_idx, nb_desc, enic->config.wq_desc_count);
792                 } else if (nb_desc != enic->config.wq_desc_count) {
793                         enic->config.wq_desc_count = nb_desc;
794                         dev_info(enic,
795                                 "TX Queues - effective number of descs:%d\n",
796                                 nb_desc);
797                 }
798         }
799
800         /* Allocate queue resources */
801         err = vnic_wq_alloc(enic->vdev, &enic->wq[queue_idx], queue_idx,
802                 enic->config.wq_desc_count,
803                 sizeof(struct wq_enet_desc));
804         if (err) {
805                 dev_err(enic, "error in allocation of wq\n");
806                 return err;
807         }
808
809         err = vnic_cq_alloc(enic->vdev, &enic->cq[cq_index], cq_index,
810                 socket_id, enic->config.wq_desc_count,
811                 sizeof(struct cq_enet_wq_desc));
812         if (err) {
813                 vnic_wq_free(wq);
814                 dev_err(enic, "error in allocation of cq for wq\n");
815         }
816
817         /* setup up CQ message */
818         snprintf((char *)name, sizeof(name),
819                  "vnic_cqmsg-%s-%d-%d", enic->bdf_name, queue_idx,
820                 instance++);
821
822         wq->cqmsg_rz = rte_memzone_reserve_aligned((const char *)name,
823                                                    sizeof(uint32_t),
824                                                    SOCKET_ID_ANY, 0,
825                                                    ENIC_ALIGN);
826         if (!wq->cqmsg_rz)
827                 return -ENOMEM;
828
829         return err;
830 }
831
832 int enic_disable(struct enic *enic)
833 {
834         unsigned int i;
835         int err;
836
837         vnic_intr_mask(&enic->intr);
838         (void)vnic_intr_masked(&enic->intr); /* flush write */
839         rte_intr_disable(&enic->pdev->intr_handle);
840         rte_intr_callback_unregister(&enic->pdev->intr_handle,
841                                      enic_intr_handler,
842                                      (void *)enic->rte_dev);
843
844         vnic_dev_disable(enic->vdev);
845
846         enic_clsf_destroy(enic);
847
848         if (!enic_is_sriov_vf(enic))
849                 vnic_dev_del_addr(enic->vdev, enic->mac_addr);
850
851         for (i = 0; i < enic->wq_count; i++) {
852                 err = vnic_wq_disable(&enic->wq[i]);
853                 if (err)
854                         return err;
855         }
856         for (i = 0; i < enic_vnic_rq_count(enic); i++) {
857                 if (enic->rq[i].in_use) {
858                         err = vnic_rq_disable(&enic->rq[i]);
859                         if (err)
860                                 return err;
861                 }
862         }
863
864         /* If we were using interrupts, set the interrupt vector to -1
865          * to disable interrupts.  We are not disabling link notifcations,
866          * though, as we want the polling of link status to continue working.
867          */
868         if (enic->rte_dev->data->dev_conf.intr_conf.lsc)
869                 vnic_dev_notify_set(enic->vdev, -1);
870
871         vnic_dev_set_reset_flag(enic->vdev, 1);
872
873         for (i = 0; i < enic->wq_count; i++)
874                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
875
876         for (i = 0; i < enic_vnic_rq_count(enic); i++)
877                 if (enic->rq[i].in_use)
878                         vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
879         for (i = 0; i < enic->cq_count; i++)
880                 vnic_cq_clean(&enic->cq[i]);
881         vnic_intr_clean(&enic->intr);
882
883         return 0;
884 }
885
886 static int enic_dev_wait(struct vnic_dev *vdev,
887         int (*start)(struct vnic_dev *, int),
888         int (*finished)(struct vnic_dev *, int *),
889         int arg)
890 {
891         int done;
892         int err;
893         int i;
894
895         err = start(vdev, arg);
896         if (err)
897                 return err;
898
899         /* Wait for func to complete...2 seconds max */
900         for (i = 0; i < 2000; i++) {
901                 err = finished(vdev, &done);
902                 if (err)
903                         return err;
904                 if (done)
905                         return 0;
906                 usleep(1000);
907         }
908         return -ETIMEDOUT;
909 }
910
911 static int enic_dev_open(struct enic *enic)
912 {
913         int err;
914
915         err = enic_dev_wait(enic->vdev, vnic_dev_open,
916                 vnic_dev_open_done, 0);
917         if (err)
918                 dev_err(enic_get_dev(enic),
919                         "vNIC device open failed, err %d\n", err);
920
921         return err;
922 }
923
924 static int enic_set_rsskey(struct enic *enic)
925 {
926         dma_addr_t rss_key_buf_pa;
927         union vnic_rss_key *rss_key_buf_va = NULL;
928         static union vnic_rss_key rss_key = {
929                 .key = {
930                         [0] = {.b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101}},
931                         [1] = {.b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101}},
932                         [2] = {.b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115}},
933                         [3] = {.b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108}},
934                 }
935         };
936         int err;
937         u8 name[NAME_MAX];
938
939         snprintf((char *)name, NAME_MAX, "rss_key-%s", enic->bdf_name);
940         rss_key_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_key),
941                 &rss_key_buf_pa, name);
942         if (!rss_key_buf_va)
943                 return -ENOMEM;
944
945         rte_memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
946
947         err = enic_set_rss_key(enic,
948                 rss_key_buf_pa,
949                 sizeof(union vnic_rss_key));
950
951         enic_free_consistent(enic, sizeof(union vnic_rss_key),
952                 rss_key_buf_va, rss_key_buf_pa);
953
954         return err;
955 }
956
957 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
958 {
959         dma_addr_t rss_cpu_buf_pa;
960         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
961         int i;
962         int err;
963         u8 name[NAME_MAX];
964
965         snprintf((char *)name, NAME_MAX, "rss_cpu-%s", enic->bdf_name);
966         rss_cpu_buf_va = enic_alloc_consistent(enic, sizeof(union vnic_rss_cpu),
967                 &rss_cpu_buf_pa, name);
968         if (!rss_cpu_buf_va)
969                 return -ENOMEM;
970
971         for (i = 0; i < (1 << rss_hash_bits); i++)
972                 (*rss_cpu_buf_va).cpu[i / 4].b[i % 4] =
973                         enic_rte_rq_idx_to_sop_idx(i % enic->rq_count);
974
975         err = enic_set_rss_cpu(enic,
976                 rss_cpu_buf_pa,
977                 sizeof(union vnic_rss_cpu));
978
979         enic_free_consistent(enic, sizeof(union vnic_rss_cpu),
980                 rss_cpu_buf_va, rss_cpu_buf_pa);
981
982         return err;
983 }
984
985 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
986         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
987 {
988         const u8 tso_ipid_split_en = 0;
989         int err;
990
991         /* Enable VLAN tag stripping */
992
993         err = enic_set_nic_cfg(enic,
994                 rss_default_cpu, rss_hash_type,
995                 rss_hash_bits, rss_base_cpu,
996                 rss_enable, tso_ipid_split_en,
997                 enic->ig_vlan_strip_en);
998
999         return err;
1000 }
1001
1002 int enic_set_rss_nic_cfg(struct enic *enic)
1003 {
1004         const u8 rss_default_cpu = 0;
1005         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1006             NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1007             NIC_CFG_RSS_HASH_TYPE_IPV6 |
1008             NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1009         const u8 rss_hash_bits = 7;
1010         const u8 rss_base_cpu = 0;
1011         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1012
1013         if (rss_enable) {
1014                 if (!enic_set_rsskey(enic)) {
1015                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1016                                 rss_enable = 0;
1017                                 dev_warning(enic, "RSS disabled, "\
1018                                         "Failed to set RSS cpu indirection table.");
1019                         }
1020                 } else {
1021                         rss_enable = 0;
1022                         dev_warning(enic,
1023                                 "RSS disabled, Failed to set RSS key.\n");
1024                 }
1025         }
1026
1027         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1028                 rss_hash_bits, rss_base_cpu, rss_enable);
1029 }
1030
1031 int enic_setup_finish(struct enic *enic)
1032 {
1033         int ret;
1034
1035         enic_init_soft_stats(enic);
1036
1037         ret = enic_set_rss_nic_cfg(enic);
1038         if (ret) {
1039                 dev_err(enic, "Failed to config nic, aborting.\n");
1040                 return -1;
1041         }
1042
1043         /* Default conf */
1044         vnic_dev_packet_filter(enic->vdev,
1045                 1 /* directed  */,
1046                 1 /* multicast */,
1047                 1 /* broadcast */,
1048                 0 /* promisc   */,
1049                 1 /* allmulti  */);
1050
1051         enic->promisc = 0;
1052         enic->allmulti = 1;
1053
1054         return 0;
1055 }
1056
1057 void enic_add_packet_filter(struct enic *enic)
1058 {
1059         /* Args -> directed, multicast, broadcast, promisc, allmulti */
1060         vnic_dev_packet_filter(enic->vdev, 1, 1, 1,
1061                 enic->promisc, enic->allmulti);
1062 }
1063
1064 int enic_get_link_status(struct enic *enic)
1065 {
1066         return vnic_dev_link_status(enic->vdev);
1067 }
1068
1069 static void enic_dev_deinit(struct enic *enic)
1070 {
1071         struct rte_eth_dev *eth_dev = enic->rte_dev;
1072
1073         /* stop link status checking */
1074         vnic_dev_notify_unset(enic->vdev);
1075
1076         rte_free(eth_dev->data->mac_addrs);
1077 }
1078
1079
1080 int enic_set_vnic_res(struct enic *enic)
1081 {
1082         struct rte_eth_dev *eth_dev = enic->rte_dev;
1083         int rc = 0;
1084
1085         /* With Rx scatter support, two RQs are now used per RQ used by
1086          * the application.
1087          */
1088         if (enic->conf_rq_count < eth_dev->data->nb_rx_queues) {
1089                 dev_err(dev, "Not enough Receive queues. Requested:%u which uses %d RQs on VIC, Configured:%u\n",
1090                         eth_dev->data->nb_rx_queues,
1091                         eth_dev->data->nb_rx_queues * 2, enic->conf_rq_count);
1092                 rc = -EINVAL;
1093         }
1094         if (enic->conf_wq_count < eth_dev->data->nb_tx_queues) {
1095                 dev_err(dev, "Not enough Transmit queues. Requested:%u, Configured:%u\n",
1096                         eth_dev->data->nb_tx_queues, enic->conf_wq_count);
1097                 rc = -EINVAL;
1098         }
1099
1100         if (enic->conf_cq_count < (eth_dev->data->nb_rx_queues +
1101                                    eth_dev->data->nb_tx_queues)) {
1102                 dev_err(dev, "Not enough Completion queues. Required:%u, Configured:%u\n",
1103                         (eth_dev->data->nb_rx_queues +
1104                          eth_dev->data->nb_tx_queues), enic->conf_cq_count);
1105                 rc = -EINVAL;
1106         }
1107
1108         if (rc == 0) {
1109                 enic->rq_count = eth_dev->data->nb_rx_queues;
1110                 enic->wq_count = eth_dev->data->nb_tx_queues;
1111                 enic->cq_count = enic->rq_count + enic->wq_count;
1112         }
1113
1114         return rc;
1115 }
1116
1117 /* Initialize the completion queue for an RQ */
1118 static int
1119 enic_reinit_rq(struct enic *enic, unsigned int rq_idx)
1120 {
1121         struct vnic_rq *sop_rq, *data_rq;
1122         unsigned int cq_idx;
1123         int rc = 0;
1124
1125         sop_rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1126         data_rq = &enic->rq[enic_rte_rq_idx_to_data_idx(rq_idx)];
1127         cq_idx = rq_idx;
1128
1129         vnic_cq_clean(&enic->cq[cq_idx]);
1130         vnic_cq_init(&enic->cq[cq_idx],
1131                      0 /* flow_control_enable */,
1132                      1 /* color_enable */,
1133                      0 /* cq_head */,
1134                      0 /* cq_tail */,
1135                      1 /* cq_tail_color */,
1136                      0 /* interrupt_enable */,
1137                      1 /* cq_entry_enable */,
1138                      0 /* cq_message_enable */,
1139                      0 /* interrupt offset */,
1140                      0 /* cq_message_addr */);
1141
1142
1143         vnic_rq_init_start(sop_rq, enic_cq_rq(enic,
1144                            enic_rte_rq_idx_to_sop_idx(rq_idx)), 0,
1145                            sop_rq->ring.desc_count - 1, 1, 0);
1146         if (data_rq->in_use) {
1147                 vnic_rq_init_start(data_rq,
1148                                    enic_cq_rq(enic,
1149                                    enic_rte_rq_idx_to_data_idx(rq_idx)), 0,
1150                                    data_rq->ring.desc_count - 1, 1, 0);
1151         }
1152
1153         rc = enic_alloc_rx_queue_mbufs(enic, sop_rq);
1154         if (rc)
1155                 return rc;
1156
1157         if (data_rq->in_use) {
1158                 rc = enic_alloc_rx_queue_mbufs(enic, data_rq);
1159                 if (rc) {
1160                         enic_rxmbuf_queue_release(enic, sop_rq);
1161                         return rc;
1162                 }
1163         }
1164
1165         return 0;
1166 }
1167
1168 /* The Cisco NIC can send and receive packets up to a max packet size
1169  * determined by the NIC type and firmware. There is also an MTU
1170  * configured into the NIC via the CIMC/UCSM management interface
1171  * which can be overridden by this function (up to the max packet size).
1172  * Depending on the network setup, doing so may cause packet drops
1173  * and unexpected behavior.
1174  */
1175 int enic_set_mtu(struct enic *enic, uint16_t new_mtu)
1176 {
1177         unsigned int rq_idx;
1178         struct vnic_rq *rq;
1179         int rc = 0;
1180         uint16_t old_mtu;       /* previous setting */
1181         uint16_t config_mtu;    /* Value configured into NIC via CIMC/UCSM */
1182         struct rte_eth_dev *eth_dev = enic->rte_dev;
1183
1184         old_mtu = eth_dev->data->mtu;
1185         config_mtu = enic->config.mtu;
1186
1187         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1188                 return -E_RTE_SECONDARY;
1189
1190         if (new_mtu > enic->max_mtu) {
1191                 dev_err(enic,
1192                         "MTU not updated: requested (%u) greater than max (%u)\n",
1193                         new_mtu, enic->max_mtu);
1194                 return -EINVAL;
1195         }
1196         if (new_mtu < ENIC_MIN_MTU) {
1197                 dev_info(enic,
1198                         "MTU not updated: requested (%u) less than min (%u)\n",
1199                         new_mtu, ENIC_MIN_MTU);
1200                 return -EINVAL;
1201         }
1202         if (new_mtu > config_mtu)
1203                 dev_warning(enic,
1204                         "MTU (%u) is greater than value configured in NIC (%u)\n",
1205                         new_mtu, config_mtu);
1206
1207         /* The easy case is when scatter is disabled. However if the MTU
1208          * becomes greater than the mbuf data size, packet drops will ensue.
1209          */
1210         if (!enic->rte_dev->data->dev_conf.rxmode.enable_scatter) {
1211                 eth_dev->data->mtu = new_mtu;
1212                 goto set_mtu_done;
1213         }
1214
1215         /* Rx scatter is enabled so reconfigure RQ's on the fly. The point is to
1216          * change Rx scatter mode if necessary for better performance. I.e. if
1217          * MTU was greater than the mbuf size and now it's less, scatter Rx
1218          * doesn't have to be used and vice versa.
1219           */
1220         rte_spinlock_lock(&enic->mtu_lock);
1221
1222         /* Stop traffic on all RQs */
1223         for (rq_idx = 0; rq_idx < enic->rq_count * 2; rq_idx++) {
1224                 rq = &enic->rq[rq_idx];
1225                 if (rq->is_sop && rq->in_use) {
1226                         rc = enic_stop_rq(enic,
1227                                           enic_sop_rq_idx_to_rte_idx(rq_idx));
1228                         if (rc) {
1229                                 dev_err(enic, "Failed to stop Rq %u\n", rq_idx);
1230                                 goto set_mtu_done;
1231                         }
1232                 }
1233         }
1234
1235         /* replace Rx function with a no-op to avoid getting stale pkts */
1236         eth_dev->rx_pkt_burst = enic_dummy_recv_pkts;
1237         rte_mb();
1238
1239         /* Allow time for threads to exit the real Rx function. */
1240         usleep(100000);
1241
1242         /* now it is safe to reconfigure the RQs */
1243
1244         /* update the mtu */
1245         eth_dev->data->mtu = new_mtu;
1246
1247         /* free and reallocate RQs with the new MTU */
1248         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1249                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1250
1251                 enic_free_rq(rq);
1252                 rc = enic_alloc_rq(enic, rq_idx, rq->socket_id, rq->mp,
1253                                    rq->tot_nb_desc, rq->rx_free_thresh);
1254                 if (rc) {
1255                         dev_err(enic,
1256                                 "Fatal MTU alloc error- No traffic will pass\n");
1257                         goto set_mtu_done;
1258                 }
1259
1260                 rc = enic_reinit_rq(enic, rq_idx);
1261                 if (rc) {
1262                         dev_err(enic,
1263                                 "Fatal MTU RQ reinit- No traffic will pass\n");
1264                         goto set_mtu_done;
1265                 }
1266         }
1267
1268         /* put back the real receive function */
1269         rte_mb();
1270         eth_dev->rx_pkt_burst = enic_recv_pkts;
1271         rte_mb();
1272
1273         /* restart Rx traffic */
1274         for (rq_idx = 0; rq_idx < enic->rq_count; rq_idx++) {
1275                 rq = &enic->rq[enic_rte_rq_idx_to_sop_idx(rq_idx)];
1276                 if (rq->is_sop && rq->in_use)
1277                         enic_start_rq(enic, rq_idx);
1278         }
1279
1280 set_mtu_done:
1281         dev_info(enic, "MTU changed from %u to %u\n",  old_mtu, new_mtu);
1282         rte_spinlock_unlock(&enic->mtu_lock);
1283         return rc;
1284 }
1285
1286 static int enic_dev_init(struct enic *enic)
1287 {
1288         int err;
1289         struct rte_eth_dev *eth_dev = enic->rte_dev;
1290
1291         vnic_dev_intr_coal_timer_info_default(enic->vdev);
1292
1293         /* Get vNIC configuration
1294         */
1295         err = enic_get_vnic_config(enic);
1296         if (err) {
1297                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
1298                 return err;
1299         }
1300
1301         /* Get available resource counts */
1302         enic_get_res_counts(enic);
1303         if (enic->conf_rq_count == 1) {
1304                 dev_err(enic, "Running with only 1 RQ configured in the vNIC is not supported.\n");
1305                 dev_err(enic, "Please configure 2 RQs in the vNIC for each Rx queue used by DPDK.\n");
1306                 dev_err(enic, "See the ENIC PMD guide for more information.\n");
1307                 return -EINVAL;
1308         }
1309
1310         /* Get the supported filters */
1311         enic_fdir_info(enic);
1312
1313         eth_dev->data->mac_addrs = rte_zmalloc("enic_mac_addr", ETH_ALEN
1314                                                 * ENIC_MAX_MAC_ADDR, 0);
1315         if (!eth_dev->data->mac_addrs) {
1316                 dev_err(enic, "mac addr storage alloc failed, aborting.\n");
1317                 return -1;
1318         }
1319         ether_addr_copy((struct ether_addr *) enic->mac_addr,
1320                         eth_dev->data->mac_addrs);
1321
1322         vnic_dev_set_reset_flag(enic->vdev, 0);
1323
1324         LIST_INIT(&enic->flows);
1325         rte_spinlock_init(&enic->flows_lock);
1326
1327         /* set up link status checking */
1328         vnic_dev_notify_set(enic->vdev, -1); /* No Intr for notify */
1329
1330         return 0;
1331
1332 }
1333
1334 int enic_probe(struct enic *enic)
1335 {
1336         struct rte_pci_device *pdev = enic->pdev;
1337         int err = -1;
1338
1339         dev_debug(enic, " Initializing ENIC PMD\n");
1340
1341         /* if this is a secondary process the hardware is already initialized */
1342         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1343                 return 0;
1344
1345         enic->bar0.vaddr = (void *)pdev->mem_resource[0].addr;
1346         enic->bar0.len = pdev->mem_resource[0].len;
1347
1348         /* Register vNIC device */
1349         enic->vdev = vnic_dev_register(NULL, enic, enic->pdev, &enic->bar0, 1);
1350         if (!enic->vdev) {
1351                 dev_err(enic, "vNIC registration failed, aborting\n");
1352                 goto err_out;
1353         }
1354
1355         LIST_INIT(&enic->memzone_list);
1356         rte_spinlock_init(&enic->memzone_list_lock);
1357
1358         vnic_register_cbacks(enic->vdev,
1359                 enic_alloc_consistent,
1360                 enic_free_consistent);
1361
1362         /* Issue device open to get device in known state */
1363         err = enic_dev_open(enic);
1364         if (err) {
1365                 dev_err(enic, "vNIC dev open failed, aborting\n");
1366                 goto err_out_unregister;
1367         }
1368
1369         /* Set ingress vlan rewrite mode before vnic initialization */
1370         err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
1371                 IG_VLAN_REWRITE_MODE_PASS_THRU);
1372         if (err) {
1373                 dev_err(enic,
1374                         "Failed to set ingress vlan rewrite mode, aborting.\n");
1375                 goto err_out_dev_close;
1376         }
1377
1378         /* Issue device init to initialize the vnic-to-switch link.
1379          * We'll start with carrier off and wait for link UP
1380          * notification later to turn on carrier.  We don't need
1381          * to wait here for the vnic-to-switch link initialization
1382          * to complete; link UP notification is the indication that
1383          * the process is complete.
1384          */
1385
1386         err = vnic_dev_init(enic->vdev, 0);
1387         if (err) {
1388                 dev_err(enic, "vNIC dev init failed, aborting\n");
1389                 goto err_out_dev_close;
1390         }
1391
1392         err = enic_dev_init(enic);
1393         if (err) {
1394                 dev_err(enic, "Device initialization failed, aborting\n");
1395                 goto err_out_dev_close;
1396         }
1397
1398         return 0;
1399
1400 err_out_dev_close:
1401         vnic_dev_close(enic->vdev);
1402 err_out_unregister:
1403         vnic_dev_unregister(enic->vdev);
1404 err_out:
1405         return err;
1406 }
1407
1408 void enic_remove(struct enic *enic)
1409 {
1410         enic_dev_deinit(enic);
1411         vnic_dev_close(enic->vdev);
1412         vnic_dev_unregister(enic->vdev);
1413 }