10462865e1facf73e0d9969e0287ed19573fcb28
[dpdk.git] / drivers / net / ena / ena_ethdev.c
1 /*-
2 * BSD LICENSE
3 *
4 * Copyright (c) 2015-2016 Amazon.com, Inc. or its affiliates.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * * Neither the name of copyright holder nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <rte_ether.h>
35 #include <rte_ethdev.h>
36 #include <rte_tcp.h>
37 #include <rte_atomic.h>
38 #include <rte_dev.h>
39 #include <rte_errno.h>
40
41 #include "ena_ethdev.h"
42 #include "ena_logs.h"
43 #include "ena_platform.h"
44 #include "ena_com.h"
45 #include "ena_eth_com.h"
46
47 #include <ena_common_defs.h>
48 #include <ena_regs_defs.h>
49 #include <ena_admin_defs.h>
50 #include <ena_eth_io_defs.h>
51
52 #define ENA_IO_TXQ_IDX(q)       (2 * (q))
53 #define ENA_IO_RXQ_IDX(q)       (2 * (q) + 1)
54 /*reverse version of ENA_IO_RXQ_IDX*/
55 #define ENA_IO_RXQ_IDX_REV(q)   ((q - 1) / 2)
56
57 /* While processing submitted and completed descriptors (rx and tx path
58  * respectively) in a loop it is desired to:
59  *  - perform batch submissions while populating sumbissmion queue
60  *  - avoid blocking transmission of other packets during cleanup phase
61  * Hence the utilization ratio of 1/8 of a queue size.
62  */
63 #define ENA_RING_DESCS_RATIO(ring_size) (ring_size / 8)
64
65 #define __MERGE_64B_H_L(h, l) (((uint64_t)h << 32) | l)
66 #define TEST_BIT(val, bit_shift) (val & (1UL << bit_shift))
67
68 #define GET_L4_HDR_LEN(mbuf)                                    \
69         ((rte_pktmbuf_mtod_offset(mbuf, struct tcp_hdr *,       \
70                 mbuf->l3_len + mbuf->l2_len)->data_off) >> 4)
71
72 #define ENA_RX_RSS_TABLE_LOG_SIZE  7
73 #define ENA_RX_RSS_TABLE_SIZE   (1 << ENA_RX_RSS_TABLE_LOG_SIZE)
74 #define ENA_HASH_KEY_SIZE       40
75
76 /** Vendor ID used by Amazon devices */
77 #define PCI_VENDOR_ID_AMAZON 0x1D0F
78 /** Amazon devices */
79 #define PCI_DEVICE_ID_ENA_VF    0xEC20
80 #define PCI_DEVICE_ID_ENA_LLQ_VF        0xEC21
81
82 static struct rte_pci_id pci_id_ena_map[] = {
83 #define RTE_PCI_DEV_ID_DECL_ENA(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
84
85         RTE_PCI_DEV_ID_DECL_ENA(PCI_VENDOR_ID_AMAZON, PCI_DEVICE_ID_ENA_VF)
86         RTE_PCI_DEV_ID_DECL_ENA(PCI_VENDOR_ID_AMAZON, PCI_DEVICE_ID_ENA_LLQ_VF)
87         {.device_id = 0},
88 };
89
90 static int ena_device_init(struct ena_com_dev *ena_dev,
91                            struct ena_com_dev_get_features_ctx *get_feat_ctx);
92 static int ena_dev_configure(struct rte_eth_dev *dev);
93 static uint16_t eth_ena_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
94                                   uint16_t nb_pkts);
95 static int ena_tx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
96                               uint16_t nb_desc, unsigned int socket_id,
97                               const struct rte_eth_txconf *tx_conf);
98 static int ena_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
99                               uint16_t nb_desc, unsigned int socket_id,
100                               const struct rte_eth_rxconf *rx_conf,
101                               struct rte_mempool *mp);
102 static uint16_t eth_ena_recv_pkts(void *rx_queue,
103                                   struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
104 static int ena_populate_rx_queue(struct ena_ring *rxq, unsigned int count);
105 static void ena_init_rings(struct ena_adapter *adapter);
106 static int ena_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
107 static int ena_start(struct rte_eth_dev *dev);
108 static void ena_close(struct rte_eth_dev *dev);
109 static void ena_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats);
110 static void ena_rx_queue_release_all(struct rte_eth_dev *dev);
111 static void ena_tx_queue_release_all(struct rte_eth_dev *dev);
112 static void ena_rx_queue_release(void *queue);
113 static void ena_tx_queue_release(void *queue);
114 static void ena_rx_queue_release_bufs(struct ena_ring *ring);
115 static void ena_tx_queue_release_bufs(struct ena_ring *ring);
116 static int ena_link_update(struct rte_eth_dev *dev,
117                            __rte_unused int wait_to_complete);
118 static int ena_queue_restart(struct ena_ring *ring);
119 static int ena_queue_restart_all(struct rte_eth_dev *dev,
120                                  enum ena_ring_type ring_type);
121 static void ena_stats_restart(struct rte_eth_dev *dev);
122 static void ena_infos_get(__rte_unused struct rte_eth_dev *dev,
123                           struct rte_eth_dev_info *dev_info);
124 static int ena_rss_reta_update(struct rte_eth_dev *dev,
125                                struct rte_eth_rss_reta_entry64 *reta_conf,
126                                uint16_t reta_size);
127 static int ena_rss_reta_query(struct rte_eth_dev *dev,
128                               struct rte_eth_rss_reta_entry64 *reta_conf,
129                               uint16_t reta_size);
130
131 static struct eth_dev_ops ena_dev_ops = {
132         .dev_configure        = ena_dev_configure,
133         .dev_infos_get        = ena_infos_get,
134         .rx_queue_setup       = ena_rx_queue_setup,
135         .tx_queue_setup       = ena_tx_queue_setup,
136         .dev_start            = ena_start,
137         .link_update          = ena_link_update,
138         .stats_get            = ena_stats_get,
139         .mtu_set              = ena_mtu_set,
140         .rx_queue_release     = ena_rx_queue_release,
141         .tx_queue_release     = ena_tx_queue_release,
142         .dev_close            = ena_close,
143         .reta_update          = ena_rss_reta_update,
144         .reta_query           = ena_rss_reta_query,
145 };
146
147 static inline void ena_rx_mbuf_prepare(struct rte_mbuf *mbuf,
148                                        struct ena_com_rx_ctx *ena_rx_ctx)
149 {
150         uint64_t ol_flags = 0;
151
152         if (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP)
153                 ol_flags |= PKT_TX_TCP_CKSUM;
154         else if (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)
155                 ol_flags |= PKT_TX_UDP_CKSUM;
156
157         if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4)
158                 ol_flags |= PKT_TX_IPV4;
159         else if (ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV6)
160                 ol_flags |= PKT_TX_IPV6;
161
162         if (unlikely(ena_rx_ctx->l4_csum_err))
163                 ol_flags |= PKT_RX_L4_CKSUM_BAD;
164         if (unlikely(ena_rx_ctx->l3_csum_err))
165                 ol_flags |= PKT_RX_IP_CKSUM_BAD;
166
167         mbuf->ol_flags = ol_flags;
168 }
169
170 static inline void ena_tx_mbuf_prepare(struct rte_mbuf *mbuf,
171                                        struct ena_com_tx_ctx *ena_tx_ctx)
172 {
173         struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
174
175         if (mbuf->ol_flags &
176             (PKT_TX_L4_MASK | PKT_TX_IP_CKSUM | PKT_TX_TCP_SEG)) {
177                 /* check if TSO is required */
178                 if (mbuf->ol_flags & PKT_TX_TCP_SEG) {
179                         ena_tx_ctx->tso_enable = true;
180
181                         ena_meta->l4_hdr_len = GET_L4_HDR_LEN(mbuf);
182                 }
183
184                 /* check if L3 checksum is needed */
185                 if (mbuf->ol_flags & PKT_TX_IP_CKSUM)
186                         ena_tx_ctx->l3_csum_enable = true;
187
188                 if (mbuf->ol_flags & PKT_TX_IPV6) {
189                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
190                 } else {
191                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
192
193                         /* set don't fragment (DF) flag */
194                         if (mbuf->packet_type &
195                                 (RTE_PTYPE_L4_NONFRAG
196                                  | RTE_PTYPE_INNER_L4_NONFRAG))
197                                 ena_tx_ctx->df = true;
198                 }
199
200                 /* check if L4 checksum is needed */
201                 switch (mbuf->ol_flags & PKT_TX_L4_MASK) {
202                 case PKT_TX_TCP_CKSUM:
203                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
204                         ena_tx_ctx->l4_csum_enable = true;
205                         break;
206                 case PKT_TX_UDP_CKSUM:
207                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
208                         ena_tx_ctx->l4_csum_enable = true;
209                         break;
210                 default:
211                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UNKNOWN;
212                         ena_tx_ctx->l4_csum_enable = false;
213                         break;
214                 }
215
216                 ena_meta->mss = mbuf->tso_segsz;
217                 ena_meta->l3_hdr_len = mbuf->l3_len;
218                 ena_meta->l3_hdr_offset = mbuf->l2_len;
219                 /* this param needed only for TSO */
220                 ena_meta->l3_outer_hdr_len = 0;
221                 ena_meta->l3_outer_hdr_offset = 0;
222
223                 ena_tx_ctx->meta_valid = true;
224         } else {
225                 ena_tx_ctx->meta_valid = false;
226         }
227 }
228
229 static void ena_close(struct rte_eth_dev *dev)
230 {
231         struct ena_adapter *adapter =
232                 (struct ena_adapter *)(dev->data->dev_private);
233
234         adapter->state = ENA_ADAPTER_STATE_STOPPED;
235
236         ena_rx_queue_release_all(dev);
237         ena_tx_queue_release_all(dev);
238 }
239
240 static int ena_rss_reta_update(struct rte_eth_dev *dev,
241                                struct rte_eth_rss_reta_entry64 *reta_conf,
242                                uint16_t reta_size)
243 {
244         struct ena_adapter *adapter =
245                 (struct ena_adapter *)(dev->data->dev_private);
246         struct ena_com_dev *ena_dev = &adapter->ena_dev;
247         int ret, i;
248         u16 entry_value;
249         int conf_idx;
250         int idx;
251
252         if ((reta_size == 0) || (reta_conf == NULL))
253                 return -EINVAL;
254
255         if (reta_size > ENA_RX_RSS_TABLE_SIZE) {
256                 RTE_LOG(WARNING, PMD,
257                         "indirection table %d is bigger than supported (%d)\n",
258                         reta_size, ENA_RX_RSS_TABLE_SIZE);
259                 ret = -EINVAL;
260                 goto err;
261         }
262
263         for (i = 0 ; i < reta_size ; i++) {
264                 /* each reta_conf is for 64 entries.
265                  * to support 128 we use 2 conf of 64
266                  */
267                 conf_idx = i / RTE_RETA_GROUP_SIZE;
268                 idx = i % RTE_RETA_GROUP_SIZE;
269                 if (TEST_BIT(reta_conf[conf_idx].mask, idx)) {
270                         entry_value =
271                                 ENA_IO_RXQ_IDX(reta_conf[conf_idx].reta[idx]);
272                         ret = ena_com_indirect_table_fill_entry(ena_dev,
273                                                                 i,
274                                                                 entry_value);
275                         if (unlikely(ret && (ret != ENA_COM_PERMISSION))) {
276                                 RTE_LOG(ERR, PMD,
277                                         "Cannot fill indirect table\n");
278                                 ret = -ENOTSUP;
279                                 goto err;
280                         }
281                 }
282         }
283
284         ret = ena_com_indirect_table_set(ena_dev);
285         if (unlikely(ret && (ret != ENA_COM_PERMISSION))) {
286                 RTE_LOG(ERR, PMD, "Cannot flush the indirect table\n");
287                 ret = -ENOTSUP;
288                 goto err;
289         }
290
291         RTE_LOG(DEBUG, PMD, "%s(): RSS configured %d entries  for port %d\n",
292                 __func__, reta_size, adapter->rte_dev->data->port_id);
293 err:
294         return ret;
295 }
296
297 /* Query redirection table. */
298 static int ena_rss_reta_query(struct rte_eth_dev *dev,
299                               struct rte_eth_rss_reta_entry64 *reta_conf,
300                               uint16_t reta_size)
301 {
302         struct ena_adapter *adapter =
303                 (struct ena_adapter *)(dev->data->dev_private);
304         struct ena_com_dev *ena_dev = &adapter->ena_dev;
305         int ret;
306         int i;
307         u32 indirect_table[ENA_RX_RSS_TABLE_SIZE] = {0};
308         int reta_conf_idx;
309         int reta_idx;
310
311         if (reta_size == 0 || reta_conf == NULL ||
312             (reta_size > RTE_RETA_GROUP_SIZE && ((reta_conf + 1) == NULL)))
313                 return -EINVAL;
314
315         ret = ena_com_indirect_table_get(ena_dev, indirect_table);
316         if (unlikely(ret && (ret != ENA_COM_PERMISSION))) {
317                 RTE_LOG(ERR, PMD, "cannot get indirect table\n");
318                 ret = -ENOTSUP;
319                 goto err;
320         }
321
322         for (i = 0 ; i < reta_size ; i++) {
323                 reta_conf_idx = i / RTE_RETA_GROUP_SIZE;
324                 reta_idx = i % RTE_RETA_GROUP_SIZE;
325                 if (TEST_BIT(reta_conf[reta_conf_idx].mask, reta_idx))
326                         reta_conf[reta_conf_idx].reta[reta_idx] =
327                                 ENA_IO_RXQ_IDX_REV(indirect_table[i]);
328         }
329 err:
330         return ret;
331 }
332
333 static int ena_rss_init_default(struct ena_adapter *adapter)
334 {
335         struct ena_com_dev *ena_dev = &adapter->ena_dev;
336         uint16_t nb_rx_queues = adapter->rte_dev->data->nb_rx_queues;
337         int rc, i;
338         u32 val;
339
340         rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
341         if (unlikely(rc)) {
342                 RTE_LOG(ERR, PMD, "Cannot init indirect table\n");
343                 goto err_rss_init;
344         }
345
346         for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
347                 val = i % nb_rx_queues;
348                 rc = ena_com_indirect_table_fill_entry(ena_dev, i,
349                                                        ENA_IO_RXQ_IDX(val));
350                 if (unlikely(rc && (rc != ENA_COM_PERMISSION))) {
351                         RTE_LOG(ERR, PMD, "Cannot fill indirect table\n");
352                         goto err_fill_indir;
353                 }
354         }
355
356         rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
357                                         ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
358         if (unlikely(rc && (rc != ENA_COM_PERMISSION))) {
359                 RTE_LOG(INFO, PMD, "Cannot fill hash function\n");
360                 goto err_fill_indir;
361         }
362
363         rc = ena_com_set_default_hash_ctrl(ena_dev);
364         if (unlikely(rc && (rc != ENA_COM_PERMISSION))) {
365                 RTE_LOG(INFO, PMD, "Cannot fill hash control\n");
366                 goto err_fill_indir;
367         }
368
369         rc = ena_com_indirect_table_set(ena_dev);
370         if (unlikely(rc && (rc != ENA_COM_PERMISSION))) {
371                 RTE_LOG(ERR, PMD, "Cannot flush the indirect table\n");
372                 goto err_fill_indir;
373         }
374         RTE_LOG(DEBUG, PMD, "RSS configured for port %d\n",
375                 adapter->rte_dev->data->port_id);
376
377         return 0;
378
379 err_fill_indir:
380         ena_com_rss_destroy(ena_dev);
381 err_rss_init:
382
383         return rc;
384 }
385
386 static void ena_rx_queue_release_all(struct rte_eth_dev *dev)
387 {
388         struct ena_ring **queues = (struct ena_ring **)dev->data->rx_queues;
389         int nb_queues = dev->data->nb_rx_queues;
390         int i;
391
392         for (i = 0; i < nb_queues; i++)
393                 ena_rx_queue_release(queues[i]);
394 }
395
396 static void ena_tx_queue_release_all(struct rte_eth_dev *dev)
397 {
398         struct ena_ring **queues = (struct ena_ring **)dev->data->tx_queues;
399         int nb_queues = dev->data->nb_tx_queues;
400         int i;
401
402         for (i = 0; i < nb_queues; i++)
403                 ena_tx_queue_release(queues[i]);
404 }
405
406 static void ena_rx_queue_release(void *queue)
407 {
408         struct ena_ring *ring = (struct ena_ring *)queue;
409         struct ena_adapter *adapter = ring->adapter;
410         int ena_qid;
411
412         ena_assert_msg(ring->configured,
413                        "API violation - releasing not configured queue");
414         ena_assert_msg(ring->adapter->state != ENA_ADAPTER_STATE_RUNNING,
415                        "API violation");
416
417         /* Destroy HW queue */
418         ena_qid = ENA_IO_RXQ_IDX(ring->id);
419         ena_com_destroy_io_queue(&adapter->ena_dev, ena_qid);
420
421         /* Free all bufs */
422         ena_rx_queue_release_bufs(ring);
423
424         /* Free ring resources */
425         if (ring->rx_buffer_info)
426                 rte_free(ring->rx_buffer_info);
427         ring->rx_buffer_info = NULL;
428
429         ring->configured = 0;
430
431         RTE_LOG(NOTICE, PMD, "RX Queue %d:%d released\n",
432                 ring->port_id, ring->id);
433 }
434
435 static void ena_tx_queue_release(void *queue)
436 {
437         struct ena_ring *ring = (struct ena_ring *)queue;
438         struct ena_adapter *adapter = ring->adapter;
439         int ena_qid;
440
441         ena_assert_msg(ring->configured,
442                        "API violation. Releasing not configured queue");
443         ena_assert_msg(ring->adapter->state != ENA_ADAPTER_STATE_RUNNING,
444                        "API violation");
445
446         /* Destroy HW queue */
447         ena_qid = ENA_IO_TXQ_IDX(ring->id);
448         ena_com_destroy_io_queue(&adapter->ena_dev, ena_qid);
449
450         /* Free all bufs */
451         ena_tx_queue_release_bufs(ring);
452
453         /* Free ring resources */
454         if (ring->tx_buffer_info)
455                 rte_free(ring->tx_buffer_info);
456
457         if (ring->empty_tx_reqs)
458                 rte_free(ring->empty_tx_reqs);
459
460         ring->empty_tx_reqs = NULL;
461         ring->tx_buffer_info = NULL;
462
463         ring->configured = 0;
464
465         RTE_LOG(NOTICE, PMD, "TX Queue %d:%d released\n",
466                 ring->port_id, ring->id);
467 }
468
469 static void ena_rx_queue_release_bufs(struct ena_ring *ring)
470 {
471         unsigned int ring_mask = ring->ring_size - 1;
472
473         while (ring->next_to_clean != ring->next_to_use) {
474                 struct rte_mbuf *m =
475                         ring->rx_buffer_info[ring->next_to_clean & ring_mask];
476
477                 if (m)
478                         __rte_mbuf_raw_free(m);
479
480                 ring->next_to_clean =
481                         ENA_CIRC_INC(ring->next_to_clean, 1, ring->ring_size);
482         }
483 }
484
485 static void ena_tx_queue_release_bufs(struct ena_ring *ring)
486 {
487         unsigned int ring_mask = ring->ring_size - 1;
488
489         while (ring->next_to_clean != ring->next_to_use) {
490                 struct ena_tx_buffer *tx_buf =
491                         &ring->tx_buffer_info[ring->next_to_clean & ring_mask];
492
493                 if (tx_buf->mbuf)
494                         rte_pktmbuf_free(tx_buf->mbuf);
495
496                 ring->next_to_clean =
497                         ENA_CIRC_INC(ring->next_to_clean, 1, ring->ring_size);
498         }
499 }
500
501 static int ena_link_update(struct rte_eth_dev *dev,
502                            __rte_unused int wait_to_complete)
503 {
504         struct rte_eth_link *link = &dev->data->dev_link;
505
506         link->link_status = 1;
507         link->link_speed = ETH_SPEED_NUM_10G;
508         link->link_duplex = ETH_LINK_FULL_DUPLEX;
509
510         return 0;
511 }
512
513 static int ena_queue_restart_all(struct rte_eth_dev *dev,
514                                  enum ena_ring_type ring_type)
515 {
516         struct ena_adapter *adapter =
517                 (struct ena_adapter *)(dev->data->dev_private);
518         struct ena_ring *queues = NULL;
519         int i = 0;
520         int rc = 0;
521
522         queues = (ring_type == ENA_RING_TYPE_RX) ?
523                 adapter->rx_ring : adapter->tx_ring;
524
525         for (i = 0; i < adapter->num_queues; i++) {
526                 if (queues[i].configured) {
527                         if (ring_type == ENA_RING_TYPE_RX) {
528                                 ena_assert_msg(
529                                         dev->data->rx_queues[i] == &queues[i],
530                                         "Inconsistent state of rx queues\n");
531                         } else {
532                                 ena_assert_msg(
533                                         dev->data->tx_queues[i] == &queues[i],
534                                         "Inconsistent state of tx queues\n");
535                         }
536
537                         rc = ena_queue_restart(&queues[i]);
538
539                         if (rc) {
540                                 PMD_INIT_LOG(ERR,
541                                              "failed to restart queue %d type(%d)\n",
542                                              i, ring_type);
543                                 return -1;
544                         }
545                 }
546         }
547
548         return 0;
549 }
550
551 static uint32_t ena_get_mtu_conf(struct ena_adapter *adapter)
552 {
553         uint32_t max_frame_len = adapter->max_mtu;
554
555         if (adapter->rte_eth_dev_data->dev_conf.rxmode.jumbo_frame == 1)
556                 max_frame_len =
557                         adapter->rte_eth_dev_data->dev_conf.rxmode.max_rx_pkt_len;
558
559         return max_frame_len;
560 }
561
562 static int ena_check_valid_conf(struct ena_adapter *adapter)
563 {
564         uint32_t max_frame_len = ena_get_mtu_conf(adapter);
565
566         if (max_frame_len > adapter->max_mtu) {
567                 PMD_INIT_LOG(ERR, "Unsupported MTU of %d\n", max_frame_len);
568                 return -1;
569         }
570
571         return 0;
572 }
573
574 static int
575 ena_calc_queue_size(struct ena_com_dev *ena_dev,
576                     struct ena_com_dev_get_features_ctx *get_feat_ctx)
577 {
578         uint32_t queue_size = ENA_DEFAULT_RING_SIZE;
579
580         queue_size = RTE_MIN(queue_size,
581                              get_feat_ctx->max_queues.max_cq_depth);
582         queue_size = RTE_MIN(queue_size,
583                              get_feat_ctx->max_queues.max_sq_depth);
584
585         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
586                 queue_size = RTE_MIN(queue_size,
587                                      get_feat_ctx->max_queues.max_llq_depth);
588
589         /* Round down to power of 2 */
590         if (!rte_is_power_of_2(queue_size))
591                 queue_size = rte_align32pow2(queue_size >> 1);
592
593         if (queue_size == 0) {
594                 PMD_INIT_LOG(ERR, "Invalid queue size\n");
595                 return -EFAULT;
596         }
597
598         return queue_size;
599 }
600
601 static void ena_stats_restart(struct rte_eth_dev *dev)
602 {
603         struct ena_adapter *adapter =
604                 (struct ena_adapter *)(dev->data->dev_private);
605
606         rte_atomic64_init(&adapter->drv_stats->ierrors);
607         rte_atomic64_init(&adapter->drv_stats->oerrors);
608         rte_atomic64_init(&adapter->drv_stats->imcasts);
609         rte_atomic64_init(&adapter->drv_stats->rx_nombuf);
610 }
611
612 static void ena_stats_get(struct rte_eth_dev *dev,
613                           struct rte_eth_stats *stats)
614 {
615         struct ena_admin_basic_stats ena_stats;
616         struct ena_adapter *adapter =
617                 (struct ena_adapter *)(dev->data->dev_private);
618         struct ena_com_dev *ena_dev = &adapter->ena_dev;
619         int rc;
620
621         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
622                 return;
623
624         memset(&ena_stats, 0, sizeof(ena_stats));
625         rc = ena_com_get_dev_basic_stats(ena_dev, &ena_stats);
626         if (unlikely(rc)) {
627                 RTE_LOG(ERR, PMD, "Could not retrieve statistics from ENA");
628                 return;
629         }
630
631         /* Set of basic statistics from ENA */
632         stats->ipackets = __MERGE_64B_H_L(ena_stats.rx_pkts_high,
633                                           ena_stats.rx_pkts_low);
634         stats->opackets = __MERGE_64B_H_L(ena_stats.tx_pkts_high,
635                                           ena_stats.tx_pkts_low);
636         stats->ibytes = __MERGE_64B_H_L(ena_stats.rx_bytes_high,
637                                         ena_stats.rx_bytes_low);
638         stats->obytes = __MERGE_64B_H_L(ena_stats.tx_bytes_high,
639                                         ena_stats.tx_bytes_low);
640         stats->imissed = __MERGE_64B_H_L(ena_stats.rx_drops_high,
641                                          ena_stats.rx_drops_low);
642
643         /* Driver related stats */
644         stats->ierrors = rte_atomic64_read(&adapter->drv_stats->ierrors);
645         stats->oerrors = rte_atomic64_read(&adapter->drv_stats->oerrors);
646         stats->imcasts = rte_atomic64_read(&adapter->drv_stats->imcasts);
647         stats->rx_nombuf = rte_atomic64_read(&adapter->drv_stats->rx_nombuf);
648 }
649
650 static int ena_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
651 {
652         struct ena_adapter *adapter;
653         struct ena_com_dev *ena_dev;
654         int rc = 0;
655
656         ena_assert_msg(dev->data != NULL, "Uninitialized device");
657         ena_assert_msg(dev->data->dev_private != NULL, "Uninitialized device");
658         adapter = (struct ena_adapter *)(dev->data->dev_private);
659
660         ena_dev = &adapter->ena_dev;
661         ena_assert_msg(ena_dev != NULL, "Uninitialized device");
662
663         if (mtu > ena_get_mtu_conf(adapter)) {
664                 RTE_LOG(ERR, PMD,
665                         "Given MTU (%d) exceeds maximum MTU supported (%d)\n",
666                         mtu, ena_get_mtu_conf(adapter));
667                 rc = -EINVAL;
668                 goto err;
669         }
670
671         rc = ena_com_set_dev_mtu(ena_dev, mtu);
672         if (rc)
673                 RTE_LOG(ERR, PMD, "Could not set MTU: %d\n", mtu);
674         else
675                 RTE_LOG(NOTICE, PMD, "Set MTU: %d\n", mtu);
676
677 err:
678         return rc;
679 }
680
681 static int ena_start(struct rte_eth_dev *dev)
682 {
683         struct ena_adapter *adapter =
684                 (struct ena_adapter *)(dev->data->dev_private);
685         int rc = 0;
686
687         if (!(adapter->state == ENA_ADAPTER_STATE_CONFIG ||
688               adapter->state == ENA_ADAPTER_STATE_STOPPED)) {
689                 PMD_INIT_LOG(ERR, "API violation");
690                 return -1;
691         }
692
693         rc = ena_check_valid_conf(adapter);
694         if (rc)
695                 return rc;
696
697         rc = ena_queue_restart_all(dev, ENA_RING_TYPE_RX);
698         if (rc)
699                 return rc;
700
701         rc = ena_queue_restart_all(dev, ENA_RING_TYPE_TX);
702         if (rc)
703                 return rc;
704
705         if (adapter->rte_dev->data->dev_conf.rxmode.mq_mode &
706             ETH_MQ_RX_RSS_FLAG) {
707                 rc = ena_rss_init_default(adapter);
708                 if (rc)
709                         return rc;
710         }
711
712         ena_stats_restart(dev);
713
714         adapter->state = ENA_ADAPTER_STATE_RUNNING;
715
716         return 0;
717 }
718
719 static int ena_queue_restart(struct ena_ring *ring)
720 {
721         int rc;
722
723         ena_assert_msg(ring->configured == 1,
724                        "Trying to restart unconfigured queue\n");
725
726         ring->next_to_clean = 0;
727         ring->next_to_use = 0;
728
729         if (ring->type == ENA_RING_TYPE_TX)
730                 return 0;
731
732         rc = ena_populate_rx_queue(ring, ring->ring_size - 1);
733         if ((unsigned int)rc != ring->ring_size - 1) {
734                 PMD_INIT_LOG(ERR, "Failed to populate rx ring !\n");
735                 return (-1);
736         }
737
738         return 0;
739 }
740
741 static int ena_tx_queue_setup(struct rte_eth_dev *dev,
742                               uint16_t queue_idx,
743                               uint16_t nb_desc,
744                               __rte_unused unsigned int socket_id,
745                               __rte_unused const struct rte_eth_txconf *tx_conf)
746 {
747         struct ena_ring *txq = NULL;
748         struct ena_adapter *adapter =
749                 (struct ena_adapter *)(dev->data->dev_private);
750         unsigned int i;
751         int ena_qid;
752         int rc;
753         struct ena_com_dev *ena_dev = &adapter->ena_dev;
754
755         txq = &adapter->tx_ring[queue_idx];
756
757         if (txq->configured) {
758                 RTE_LOG(CRIT, PMD,
759                         "API violation. Queue %d is already configured\n",
760                         queue_idx);
761                 return -1;
762         }
763
764         if (nb_desc > adapter->tx_ring_size) {
765                 RTE_LOG(ERR, PMD,
766                         "Unsupported size of TX queue (max size: %d)\n",
767                         adapter->tx_ring_size);
768                 return -EINVAL;
769         }
770
771         ena_qid = ENA_IO_TXQ_IDX(queue_idx);
772         rc = ena_com_create_io_queue(ena_dev, ena_qid,
773                                      ENA_COM_IO_QUEUE_DIRECTION_TX,
774                                      ena_dev->tx_mem_queue_type,
775                                      -1 /* admin interrupts is not used */,
776                                      nb_desc);
777         if (rc) {
778                 RTE_LOG(ERR, PMD,
779                         "failed to create io TX queue #%d (qid:%d) rc: %d\n",
780                         queue_idx, ena_qid, rc);
781         }
782         txq->ena_com_io_cq = &ena_dev->io_cq_queues[ena_qid];
783         txq->ena_com_io_sq = &ena_dev->io_sq_queues[ena_qid];
784
785         txq->port_id = dev->data->port_id;
786         txq->next_to_clean = 0;
787         txq->next_to_use = 0;
788         txq->ring_size = nb_desc;
789
790         txq->tx_buffer_info = rte_zmalloc("txq->tx_buffer_info",
791                                           sizeof(struct ena_tx_buffer) *
792                                           txq->ring_size,
793                                           RTE_CACHE_LINE_SIZE);
794         if (!txq->tx_buffer_info) {
795                 RTE_LOG(ERR, PMD, "failed to alloc mem for tx buffer info\n");
796                 return -ENOMEM;
797         }
798
799         txq->empty_tx_reqs = rte_zmalloc("txq->empty_tx_reqs",
800                                          sizeof(u16) * txq->ring_size,
801                                          RTE_CACHE_LINE_SIZE);
802         if (!txq->empty_tx_reqs) {
803                 RTE_LOG(ERR, PMD, "failed to alloc mem for tx reqs\n");
804                 rte_free(txq->tx_buffer_info);
805                 return -ENOMEM;
806         }
807         for (i = 0; i < txq->ring_size; i++)
808                 txq->empty_tx_reqs[i] = i;
809
810         /* Store pointer to this queue in upper layer */
811         txq->configured = 1;
812         dev->data->tx_queues[queue_idx] = txq;
813
814         return rc;
815 }
816
817 static int ena_rx_queue_setup(struct rte_eth_dev *dev,
818                               uint16_t queue_idx,
819                               uint16_t nb_desc,
820                               __rte_unused unsigned int socket_id,
821                               __rte_unused const struct rte_eth_rxconf *rx_conf,
822                               struct rte_mempool *mp)
823 {
824         struct ena_adapter *adapter =
825                 (struct ena_adapter *)(dev->data->dev_private);
826         struct ena_ring *rxq = NULL;
827         uint16_t ena_qid = 0;
828         int rc = 0;
829         struct ena_com_dev *ena_dev = &adapter->ena_dev;
830
831         rxq = &adapter->rx_ring[queue_idx];
832         if (rxq->configured) {
833                 RTE_LOG(CRIT, PMD,
834                         "API violation. Queue %d is already configured\n",
835                         queue_idx);
836                 return -1;
837         }
838
839         if (nb_desc > adapter->rx_ring_size) {
840                 RTE_LOG(ERR, PMD,
841                         "Unsupported size of RX queue (max size: %d)\n",
842                         adapter->rx_ring_size);
843                 return -EINVAL;
844         }
845
846         ena_qid = ENA_IO_RXQ_IDX(queue_idx);
847         rc = ena_com_create_io_queue(ena_dev, ena_qid,
848                                      ENA_COM_IO_QUEUE_DIRECTION_RX,
849                                      ENA_ADMIN_PLACEMENT_POLICY_HOST,
850                                      -1 /* admin interrupts not used */,
851                                      nb_desc);
852         if (rc)
853                 RTE_LOG(ERR, PMD, "failed to create io RX queue #%d rc: %d\n",
854                         queue_idx, rc);
855
856         rxq->ena_com_io_cq = &ena_dev->io_cq_queues[ena_qid];
857         rxq->ena_com_io_sq = &ena_dev->io_sq_queues[ena_qid];
858
859         rxq->port_id = dev->data->port_id;
860         rxq->next_to_clean = 0;
861         rxq->next_to_use = 0;
862         rxq->ring_size = nb_desc;
863         rxq->mb_pool = mp;
864
865         rxq->rx_buffer_info = rte_zmalloc("rxq->buffer_info",
866                                           sizeof(struct rte_mbuf *) * nb_desc,
867                                           RTE_CACHE_LINE_SIZE);
868         if (!rxq->rx_buffer_info) {
869                 RTE_LOG(ERR, PMD, "failed to alloc mem for rx buffer info\n");
870                 return -ENOMEM;
871         }
872
873         /* Store pointer to this queue in upper layer */
874         rxq->configured = 1;
875         dev->data->rx_queues[queue_idx] = rxq;
876
877         return rc;
878 }
879
880 static int ena_populate_rx_queue(struct ena_ring *rxq, unsigned int count)
881 {
882         unsigned int i;
883         int rc;
884         unsigned int ring_size = rxq->ring_size;
885         unsigned int ring_mask = ring_size - 1;
886         int next_to_use = rxq->next_to_use & ring_mask;
887         struct rte_mbuf **mbufs = &rxq->rx_buffer_info[0];
888
889         if (unlikely(!count))
890                 return 0;
891
892         ena_assert_msg((((ENA_CIRC_COUNT(rxq->next_to_use, rxq->next_to_clean,
893                                          rxq->ring_size)) +
894                          count) < rxq->ring_size), "bad ring state");
895
896         count = RTE_MIN(count, ring_size - next_to_use);
897
898         /* get resources for incoming packets */
899         rc = rte_mempool_get_bulk(rxq->mb_pool,
900                                   (void **)(&mbufs[next_to_use]), count);
901         if (unlikely(rc < 0)) {
902                 rte_atomic64_inc(&rxq->adapter->drv_stats->rx_nombuf);
903                 PMD_RX_LOG(DEBUG, "there are no enough free buffers");
904                 return 0;
905         }
906
907         for (i = 0; i < count; i++) {
908                 struct rte_mbuf *mbuf = mbufs[next_to_use];
909                 struct ena_com_buf ebuf;
910
911                 rte_prefetch0(mbufs[((next_to_use + 4) & ring_mask)]);
912                 /* prepare physical address for DMA transaction */
913                 ebuf.paddr = mbuf->buf_physaddr + RTE_PKTMBUF_HEADROOM;
914                 ebuf.len = mbuf->buf_len - RTE_PKTMBUF_HEADROOM;
915                 /* pass resource to device */
916                 rc = ena_com_add_single_rx_desc(rxq->ena_com_io_sq,
917                                                 &ebuf, next_to_use);
918                 if (unlikely(rc)) {
919                         RTE_LOG(WARNING, PMD, "failed adding rx desc\n");
920                         break;
921                 }
922                 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use, ring_size);
923         }
924
925         rte_wmb();
926         rxq->next_to_use = next_to_use;
927         /* let HW know that it can fill buffers with data */
928         ena_com_write_sq_doorbell(rxq->ena_com_io_sq);
929
930         return i;
931 }
932
933 static int ena_device_init(struct ena_com_dev *ena_dev,
934                            struct ena_com_dev_get_features_ctx *get_feat_ctx)
935 {
936         int rc;
937
938         /* Initialize mmio registers */
939         rc = ena_com_mmio_reg_read_request_init(ena_dev);
940         if (rc) {
941                 RTE_LOG(ERR, PMD, "failed to init mmio read less\n");
942                 return rc;
943         }
944
945         /* reset device */
946         rc = ena_com_dev_reset(ena_dev);
947         if (rc) {
948                 RTE_LOG(ERR, PMD, "cannot reset device\n");
949                 goto err_mmio_read_less;
950         }
951
952         /* check FW version */
953         rc = ena_com_validate_version(ena_dev);
954         if (rc) {
955                 RTE_LOG(ERR, PMD, "device version is too low\n");
956                 goto err_mmio_read_less;
957         }
958
959         ena_dev->dma_addr_bits = ena_com_get_dma_width(ena_dev);
960
961         /* ENA device administration layer init */
962         rc = ena_com_admin_init(ena_dev, NULL, true);
963         if (rc) {
964                 RTE_LOG(ERR, PMD,
965                         "cannot initialize ena admin queue with device\n");
966                 goto err_mmio_read_less;
967         }
968
969         /* To enable the msix interrupts the driver needs to know the number
970          * of queues. So the driver uses polling mode to retrieve this
971          * information.
972          */
973         ena_com_set_admin_polling_mode(ena_dev, true);
974
975         /* Get Device Attributes and features */
976         rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
977         if (rc) {
978                 RTE_LOG(ERR, PMD,
979                         "cannot get attribute for ena device rc= %d\n", rc);
980                 goto err_admin_init;
981         }
982
983         return 0;
984
985 err_admin_init:
986         ena_com_admin_destroy(ena_dev);
987
988 err_mmio_read_less:
989         ena_com_mmio_reg_read_request_destroy(ena_dev);
990
991         return rc;
992 }
993
994 static int eth_ena_dev_init(struct rte_eth_dev *eth_dev)
995 {
996         struct rte_pci_device *pci_dev;
997         struct ena_adapter *adapter =
998                 (struct ena_adapter *)(eth_dev->data->dev_private);
999         struct ena_com_dev *ena_dev = &adapter->ena_dev;
1000         struct ena_com_dev_get_features_ctx get_feat_ctx;
1001         int queue_size, rc;
1002
1003         static int adapters_found;
1004
1005         memset(adapter, 0, sizeof(struct ena_adapter));
1006         ena_dev = &adapter->ena_dev;
1007
1008         eth_dev->dev_ops = &ena_dev_ops;
1009         eth_dev->rx_pkt_burst = &eth_ena_recv_pkts;
1010         eth_dev->tx_pkt_burst = &eth_ena_xmit_pkts;
1011         adapter->rte_eth_dev_data = eth_dev->data;
1012         adapter->rte_dev = eth_dev;
1013
1014         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1015                 return 0;
1016
1017         pci_dev = eth_dev->pci_dev;
1018         adapter->pdev = pci_dev;
1019
1020         PMD_INIT_LOG(INFO, "Initializing %x:%x:%x.%d\n",
1021                      pci_dev->addr.domain,
1022                      pci_dev->addr.bus,
1023                      pci_dev->addr.devid,
1024                      pci_dev->addr.function);
1025
1026         adapter->regs = pci_dev->mem_resource[ENA_REGS_BAR].addr;
1027         adapter->dev_mem_base = pci_dev->mem_resource[ENA_MEM_BAR].addr;
1028
1029         /* Present ENA_MEM_BAR indicates available LLQ mode.
1030          * Use corresponding policy
1031          */
1032         if (adapter->dev_mem_base)
1033                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
1034         else if (adapter->regs)
1035                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
1036         else
1037                 PMD_INIT_LOG(CRIT, "Failed to access registers BAR(%d)\n",
1038                              ENA_REGS_BAR);
1039
1040         ena_dev->reg_bar = adapter->regs;
1041         ena_dev->dmadev = adapter->pdev;
1042
1043         adapter->id_number = adapters_found;
1044
1045         snprintf(adapter->name, ENA_NAME_MAX_LEN, "ena_%d",
1046                  adapter->id_number);
1047
1048         /* device specific initialization routine */
1049         rc = ena_device_init(ena_dev, &get_feat_ctx);
1050         if (rc) {
1051                 PMD_INIT_LOG(CRIT, "Failed to init ENA device\n");
1052                 return -1;
1053         }
1054
1055         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1056                 if (get_feat_ctx.max_queues.max_llq_num == 0) {
1057                         PMD_INIT_LOG(ERR,
1058                                      "Trying to use LLQ but llq_num is 0.\n"
1059                                      "Fall back into regular queues.\n");
1060                         ena_dev->tx_mem_queue_type =
1061                                 ENA_ADMIN_PLACEMENT_POLICY_HOST;
1062                         adapter->num_queues =
1063                                 get_feat_ctx.max_queues.max_sq_num;
1064                 } else {
1065                         adapter->num_queues =
1066                                 get_feat_ctx.max_queues.max_llq_num;
1067                 }
1068         } else {
1069                 adapter->num_queues = get_feat_ctx.max_queues.max_sq_num;
1070         }
1071
1072         queue_size = ena_calc_queue_size(ena_dev, &get_feat_ctx);
1073         if ((queue_size <= 0) || (adapter->num_queues <= 0))
1074                 return -EFAULT;
1075
1076         adapter->tx_ring_size = queue_size;
1077         adapter->rx_ring_size = queue_size;
1078
1079         /* prepare ring structures */
1080         ena_init_rings(adapter);
1081
1082         /* Set max MTU for this device */
1083         adapter->max_mtu = get_feat_ctx.dev_attr.max_mtu;
1084
1085         /* Copy MAC address and point DPDK to it */
1086         eth_dev->data->mac_addrs = (struct ether_addr *)adapter->mac_addr;
1087         ether_addr_copy((struct ether_addr *)get_feat_ctx.dev_attr.mac_addr,
1088                         (struct ether_addr *)adapter->mac_addr);
1089
1090         adapter->drv_stats = rte_zmalloc("adapter stats",
1091                                          sizeof(*adapter->drv_stats),
1092                                          RTE_CACHE_LINE_SIZE);
1093         if (!adapter->drv_stats) {
1094                 RTE_LOG(ERR, PMD, "failed to alloc mem for adapter stats\n");
1095                 return -ENOMEM;
1096         }
1097
1098         adapters_found++;
1099         adapter->state = ENA_ADAPTER_STATE_INIT;
1100
1101         return 0;
1102 }
1103
1104 static int ena_dev_configure(struct rte_eth_dev *dev)
1105 {
1106         struct ena_adapter *adapter =
1107                 (struct ena_adapter *)(dev->data->dev_private);
1108
1109         if (!(adapter->state == ENA_ADAPTER_STATE_INIT ||
1110               adapter->state == ENA_ADAPTER_STATE_STOPPED)) {
1111                 PMD_INIT_LOG(ERR, "Illegal adapter state: %d\n",
1112                              adapter->state);
1113                 return -1;
1114         }
1115
1116         switch (adapter->state) {
1117         case ENA_ADAPTER_STATE_INIT:
1118         case ENA_ADAPTER_STATE_STOPPED:
1119                 adapter->state = ENA_ADAPTER_STATE_CONFIG;
1120                 break;
1121         case ENA_ADAPTER_STATE_CONFIG:
1122                 RTE_LOG(WARNING, PMD,
1123                         "Ivalid driver state while trying to configure device\n");
1124                 break;
1125         default:
1126                 break;
1127         }
1128
1129         return 0;
1130 }
1131
1132 static void ena_init_rings(struct ena_adapter *adapter)
1133 {
1134         int i;
1135
1136         for (i = 0; i < adapter->num_queues; i++) {
1137                 struct ena_ring *ring = &adapter->tx_ring[i];
1138
1139                 ring->configured = 0;
1140                 ring->type = ENA_RING_TYPE_TX;
1141                 ring->adapter = adapter;
1142                 ring->id = i;
1143                 ring->tx_mem_queue_type = adapter->ena_dev.tx_mem_queue_type;
1144                 ring->tx_max_header_size = adapter->ena_dev.tx_max_header_size;
1145         }
1146
1147         for (i = 0; i < adapter->num_queues; i++) {
1148                 struct ena_ring *ring = &adapter->rx_ring[i];
1149
1150                 ring->configured = 0;
1151                 ring->type = ENA_RING_TYPE_RX;
1152                 ring->adapter = adapter;
1153                 ring->id = i;
1154         }
1155 }
1156
1157 static void ena_infos_get(struct rte_eth_dev *dev,
1158                           struct rte_eth_dev_info *dev_info)
1159 {
1160         struct ena_adapter *adapter;
1161         struct ena_com_dev *ena_dev;
1162         struct ena_com_dev_get_features_ctx feat;
1163         uint32_t rx_feat = 0, tx_feat = 0;
1164         int rc = 0;
1165
1166         ena_assert_msg(dev->data != NULL, "Uninitialized device");
1167         ena_assert_msg(dev->data->dev_private != NULL, "Uninitialized device");
1168         adapter = (struct ena_adapter *)(dev->data->dev_private);
1169
1170         ena_dev = &adapter->ena_dev;
1171         ena_assert_msg(ena_dev != NULL, "Uninitialized device");
1172
1173         /* Get supported features from HW */
1174         rc = ena_com_get_dev_attr_feat(ena_dev, &feat);
1175         if (unlikely(rc)) {
1176                 RTE_LOG(ERR, PMD,
1177                         "Cannot get attribute for ena device rc= %d\n", rc);
1178                 return;
1179         }
1180
1181         /* Set Tx & Rx features available for device */
1182         if (feat.offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK)
1183                 tx_feat |= DEV_TX_OFFLOAD_TCP_TSO;
1184
1185         if (feat.offload.tx &
1186             ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)
1187                 tx_feat |= DEV_TX_OFFLOAD_IPV4_CKSUM |
1188                         DEV_TX_OFFLOAD_UDP_CKSUM |
1189                         DEV_TX_OFFLOAD_TCP_CKSUM;
1190
1191         if (feat.offload.tx &
1192             ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK)
1193                 rx_feat |= DEV_RX_OFFLOAD_IPV4_CKSUM |
1194                         DEV_RX_OFFLOAD_UDP_CKSUM  |
1195                         DEV_RX_OFFLOAD_TCP_CKSUM;
1196
1197         /* Inform framework about available features */
1198         dev_info->rx_offload_capa = rx_feat;
1199         dev_info->tx_offload_capa = tx_feat;
1200
1201         dev_info->min_rx_bufsize = ENA_MIN_FRAME_LEN;
1202         dev_info->max_rx_pktlen  = adapter->max_mtu;
1203         dev_info->max_mac_addrs = 1;
1204
1205         dev_info->max_rx_queues = adapter->num_queues;
1206         dev_info->max_tx_queues = adapter->num_queues;
1207         dev_info->reta_size = ENA_RX_RSS_TABLE_SIZE;
1208 }
1209
1210 static uint16_t eth_ena_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
1211                                   uint16_t nb_pkts)
1212 {
1213         struct ena_ring *rx_ring = (struct ena_ring *)(rx_queue);
1214         unsigned int ring_size = rx_ring->ring_size;
1215         unsigned int ring_mask = ring_size - 1;
1216         uint16_t next_to_clean = rx_ring->next_to_clean;
1217         int desc_in_use = 0;
1218         unsigned int recv_idx = 0;
1219         struct rte_mbuf *mbuf = NULL;
1220         struct rte_mbuf *mbuf_head = NULL;
1221         struct rte_mbuf *mbuf_prev = NULL;
1222         struct rte_mbuf **rx_buff_info = rx_ring->rx_buffer_info;
1223         unsigned int completed;
1224
1225         struct ena_com_rx_ctx ena_rx_ctx;
1226         int rc = 0;
1227
1228         /* Check adapter state */
1229         if (unlikely(rx_ring->adapter->state != ENA_ADAPTER_STATE_RUNNING)) {
1230                 RTE_LOG(ALERT, PMD,
1231                         "Trying to receive pkts while device is NOT running\n");
1232                 return 0;
1233         }
1234
1235         desc_in_use = ENA_CIRC_COUNT(rx_ring->next_to_use,
1236                                      next_to_clean, ring_size);
1237         if (unlikely(nb_pkts > desc_in_use))
1238                 nb_pkts = desc_in_use;
1239
1240         for (completed = 0; completed < nb_pkts; completed++) {
1241                 int segments = 0;
1242
1243                 ena_rx_ctx.max_bufs = rx_ring->ring_size;
1244                 ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
1245                 ena_rx_ctx.descs = 0;
1246                 /* receive packet context */
1247                 rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq,
1248                                     rx_ring->ena_com_io_sq,
1249                                     &ena_rx_ctx);
1250                 if (unlikely(rc)) {
1251                         RTE_LOG(ERR, PMD, "ena_com_rx_pkt error %d\n", rc);
1252                         return 0;
1253                 }
1254
1255                 if (unlikely(ena_rx_ctx.descs == 0))
1256                         break;
1257
1258                 while (segments < ena_rx_ctx.descs) {
1259                         mbuf = rx_buff_info[next_to_clean & ring_mask];
1260                         mbuf->data_len = ena_rx_ctx.ena_bufs[segments].len;
1261                         mbuf->data_off = RTE_PKTMBUF_HEADROOM;
1262                         mbuf->refcnt = 1;
1263                         mbuf->next = NULL;
1264                         if (segments == 0) {
1265                                 mbuf->nb_segs = ena_rx_ctx.descs;
1266                                 mbuf->port = rx_ring->port_id;
1267                                 mbuf->pkt_len = 0;
1268                                 mbuf_head = mbuf;
1269                         } else {
1270                                 /* for multi-segment pkts create mbuf chain */
1271                                 mbuf_prev->next = mbuf;
1272                         }
1273                         mbuf_head->pkt_len += mbuf->data_len;
1274
1275                         mbuf_prev = mbuf;
1276                         segments++;
1277                         next_to_clean =
1278                                 ENA_RX_RING_IDX_NEXT(next_to_clean, ring_size);
1279                 }
1280
1281                 /* fill mbuf attributes if any */
1282                 ena_rx_mbuf_prepare(mbuf_head, &ena_rx_ctx);
1283                 mbuf_head->hash.rss = (uint32_t)rx_ring->id;
1284
1285                 /* pass to DPDK application head mbuf */
1286                 rx_pkts[recv_idx] = mbuf_head;
1287                 recv_idx++;
1288         }
1289
1290         /* Burst refill to save doorbells, memory barriers, const interval */
1291         if (ring_size - desc_in_use - 1 > ENA_RING_DESCS_RATIO(ring_size))
1292                 ena_populate_rx_queue(rx_ring, ring_size - desc_in_use - 1);
1293
1294         rx_ring->next_to_clean = next_to_clean & ring_mask;
1295
1296         return recv_idx;
1297 }
1298
1299 static uint16_t eth_ena_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
1300                                   uint16_t nb_pkts)
1301 {
1302         struct ena_ring *tx_ring = (struct ena_ring *)(tx_queue);
1303         unsigned int next_to_use = tx_ring->next_to_use;
1304         struct rte_mbuf *mbuf;
1305         unsigned int ring_size = tx_ring->ring_size;
1306         unsigned int ring_mask = ring_size - 1;
1307         struct ena_com_tx_ctx ena_tx_ctx;
1308         struct ena_tx_buffer *tx_info;
1309         struct ena_com_buf *ebuf;
1310         uint16_t rc, req_id, total_tx_descs = 0;
1311         int sent_idx = 0;
1312         int nb_hw_desc;
1313
1314         /* Check adapter state */
1315         if (unlikely(tx_ring->adapter->state != ENA_ADAPTER_STATE_RUNNING)) {
1316                 RTE_LOG(ALERT, PMD,
1317                         "Trying to xmit pkts while device is NOT running\n");
1318                 return 0;
1319         }
1320
1321         for (sent_idx = 0; sent_idx < nb_pkts; sent_idx++) {
1322                 mbuf = tx_pkts[sent_idx];
1323
1324                 req_id = tx_ring->empty_tx_reqs[next_to_use];
1325                 tx_info = &tx_ring->tx_buffer_info[req_id];
1326                 tx_info->mbuf = mbuf;
1327                 tx_info->num_of_bufs = 0;
1328                 ebuf = tx_info->bufs;
1329
1330                 /* Prepare TX context */
1331                 memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
1332                 memset(&ena_tx_ctx.ena_meta, 0x0,
1333                        sizeof(struct ena_com_tx_meta));
1334                 ena_tx_ctx.ena_bufs = ebuf;
1335                 ena_tx_ctx.req_id = req_id;
1336                 if (tx_ring->tx_mem_queue_type ==
1337                                 ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1338                         /* prepare the push buffer with
1339                          * virtual address of the data
1340                          */
1341                         ena_tx_ctx.header_len =
1342                                 RTE_MIN(mbuf->data_len,
1343                                         tx_ring->tx_max_header_size);
1344                         ena_tx_ctx.push_header =
1345                                 (void *)((char *)mbuf->buf_addr +
1346                                          mbuf->data_off);
1347                 } /* there's no else as we take advantage of memset zeroing */
1348
1349                 /* Set TX offloads flags, if applicable */
1350                 ena_tx_mbuf_prepare(mbuf, &ena_tx_ctx);
1351
1352                 if (unlikely(mbuf->ol_flags &
1353                              (PKT_RX_L4_CKSUM_BAD | PKT_RX_IP_CKSUM_BAD)))
1354                         rte_atomic64_inc(&tx_ring->adapter->drv_stats->ierrors);
1355
1356                 rte_prefetch0(tx_pkts[(sent_idx + 4) & ring_mask]);
1357
1358                 /* Process first segment taking into
1359                  * consideration pushed header
1360                  */
1361                 if (mbuf->data_len > ena_tx_ctx.header_len) {
1362                         ebuf->paddr = mbuf->buf_physaddr +
1363                                       mbuf->data_off +
1364                                       ena_tx_ctx.header_len;
1365                         ebuf->len = mbuf->data_len - ena_tx_ctx.header_len;
1366                         ebuf++;
1367                         tx_info->num_of_bufs++;
1368                 }
1369
1370                 while ((mbuf = mbuf->next) != NULL) {
1371                         ebuf->paddr = mbuf->buf_physaddr + mbuf->data_off;
1372                         ebuf->len = mbuf->data_len;
1373                         ebuf++;
1374                         tx_info->num_of_bufs++;
1375                 }
1376
1377                 ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
1378
1379                 /* Write data to device */
1380                 rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq,
1381                                         &ena_tx_ctx, &nb_hw_desc);
1382                 if (unlikely(rc))
1383                         break;
1384
1385                 tx_info->tx_descs = nb_hw_desc;
1386
1387                 next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use, ring_size);
1388         }
1389
1390         /* Let HW do it's best :-) */
1391         rte_wmb();
1392         ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
1393
1394         /* Clear complete packets  */
1395         while (ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq, &req_id) >= 0) {
1396                 /* Get Tx info & store how many descs were processed  */
1397                 tx_info = &tx_ring->tx_buffer_info[req_id];
1398                 total_tx_descs += tx_info->tx_descs;
1399
1400                 /* Free whole mbuf chain  */
1401                 mbuf = tx_info->mbuf;
1402                 rte_pktmbuf_free(mbuf);
1403
1404                 /* Put back descriptor to the ring for reuse */
1405                 tx_ring->empty_tx_reqs[tx_ring->next_to_clean] = req_id;
1406                 tx_ring->next_to_clean =
1407                         ENA_TX_RING_IDX_NEXT(tx_ring->next_to_clean,
1408                                              tx_ring->ring_size);
1409
1410                 /* If too many descs to clean, leave it for another run */
1411                 if (unlikely(total_tx_descs > ENA_RING_DESCS_RATIO(ring_size)))
1412                         break;
1413         }
1414
1415         /* acknowledge completion of sent packets */
1416         ena_com_comp_ack(tx_ring->ena_com_io_sq, total_tx_descs);
1417         tx_ring->next_to_use = next_to_use;
1418         return sent_idx;
1419 }
1420
1421 static struct eth_driver rte_ena_pmd = {
1422         {
1423                 .name = "rte_ena_pmd",
1424                 .id_table = pci_id_ena_map,
1425                 .drv_flags = RTE_PCI_DRV_NEED_MAPPING,
1426         },
1427         .eth_dev_init = eth_ena_dev_init,
1428         .dev_private_size = sizeof(struct ena_adapter),
1429 };
1430
1431 static int
1432 rte_ena_pmd_init(const char *name __rte_unused,
1433                  const char *params __rte_unused)
1434 {
1435         rte_eth_driver_register(&rte_ena_pmd);
1436         return 0;
1437 };
1438
1439 struct rte_driver ena_pmd_drv = {
1440         .name = "ena_driver",
1441         .type = PMD_PDEV,
1442         .init = rte_ena_pmd_init,
1443 };
1444
1445 PMD_REGISTER_DRIVER(ena_pmd_drv);