New upstream version 18.08
[deb_dpdk.git] / drivers / net / mlx5 / mlx5_rxq.c
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright 2015 6WIND S.A.
3  * Copyright 2015 Mellanox Technologies, Ltd
4  */
5
6 #include <stddef.h>
7 #include <assert.h>
8 #include <errno.h>
9 #include <string.h>
10 #include <stdint.h>
11 #include <fcntl.h>
12 #include <sys/queue.h>
13
14 /* Verbs header. */
15 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
16 #ifdef PEDANTIC
17 #pragma GCC diagnostic ignored "-Wpedantic"
18 #endif
19 #include <infiniband/verbs.h>
20 #include <infiniband/mlx5dv.h>
21 #ifdef PEDANTIC
22 #pragma GCC diagnostic error "-Wpedantic"
23 #endif
24
25 #include <rte_mbuf.h>
26 #include <rte_malloc.h>
27 #include <rte_ethdev_driver.h>
28 #include <rte_common.h>
29 #include <rte_interrupts.h>
30 #include <rte_debug.h>
31 #include <rte_io.h>
32
33 #include "mlx5.h"
34 #include "mlx5_rxtx.h"
35 #include "mlx5_utils.h"
36 #include "mlx5_autoconf.h"
37 #include "mlx5_defs.h"
38 #include "mlx5_glue.h"
39
40 /* Default RSS hash key also used for ConnectX-3. */
41 uint8_t rss_hash_default_key[] = {
42         0x2c, 0xc6, 0x81, 0xd1,
43         0x5b, 0xdb, 0xf4, 0xf7,
44         0xfc, 0xa2, 0x83, 0x19,
45         0xdb, 0x1a, 0x3e, 0x94,
46         0x6b, 0x9e, 0x38, 0xd9,
47         0x2c, 0x9c, 0x03, 0xd1,
48         0xad, 0x99, 0x44, 0xa7,
49         0xd9, 0x56, 0x3d, 0x59,
50         0x06, 0x3c, 0x25, 0xf3,
51         0xfc, 0x1f, 0xdc, 0x2a,
52 };
53
54 /* Length of the default RSS hash key. */
55 static_assert(MLX5_RSS_HASH_KEY_LEN ==
56               (unsigned int)sizeof(rss_hash_default_key),
57               "wrong RSS default key size.");
58
59 /**
60  * Check whether Multi-Packet RQ can be enabled for the device.
61  *
62  * @param dev
63  *   Pointer to Ethernet device.
64  *
65  * @return
66  *   1 if supported, negative errno value if not.
67  */
68 inline int
69 mlx5_check_mprq_support(struct rte_eth_dev *dev)
70 {
71         struct priv *priv = dev->data->dev_private;
72
73         if (priv->config.mprq.enabled &&
74             priv->rxqs_n >= priv->config.mprq.min_rxqs_num)
75                 return 1;
76         return -ENOTSUP;
77 }
78
79 /**
80  * Check whether Multi-Packet RQ is enabled for the Rx queue.
81  *
82  *  @param rxq
83  *     Pointer to receive queue structure.
84  *
85  * @return
86  *   0 if disabled, otherwise enabled.
87  */
88 inline int
89 mlx5_rxq_mprq_enabled(struct mlx5_rxq_data *rxq)
90 {
91         return rxq->strd_num_n > 0;
92 }
93
94 /**
95  * Check whether Multi-Packet RQ is enabled for the device.
96  *
97  * @param dev
98  *   Pointer to Ethernet device.
99  *
100  * @return
101  *   0 if disabled, otherwise enabled.
102  */
103 inline int
104 mlx5_mprq_enabled(struct rte_eth_dev *dev)
105 {
106         struct priv *priv = dev->data->dev_private;
107         uint16_t i;
108         uint16_t n = 0;
109
110         if (mlx5_check_mprq_support(dev) < 0)
111                 return 0;
112         /* All the configured queues should be enabled. */
113         for (i = 0; i < priv->rxqs_n; ++i) {
114                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
115
116                 if (!rxq)
117                         continue;
118                 if (mlx5_rxq_mprq_enabled(rxq))
119                         ++n;
120         }
121         /* Multi-Packet RQ can't be partially configured. */
122         assert(n == 0 || n == priv->rxqs_n);
123         return n == priv->rxqs_n;
124 }
125
126 /**
127  * Allocate RX queue elements for Multi-Packet RQ.
128  *
129  * @param rxq_ctrl
130  *   Pointer to RX queue structure.
131  *
132  * @return
133  *   0 on success, a negative errno value otherwise and rte_errno is set.
134  */
135 static int
136 rxq_alloc_elts_mprq(struct mlx5_rxq_ctrl *rxq_ctrl)
137 {
138         struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
139         unsigned int wqe_n = 1 << rxq->elts_n;
140         unsigned int i;
141         int err;
142
143         /* Iterate on segments. */
144         for (i = 0; i <= wqe_n; ++i) {
145                 struct mlx5_mprq_buf *buf;
146
147                 if (rte_mempool_get(rxq->mprq_mp, (void **)&buf) < 0) {
148                         DRV_LOG(ERR, "port %u empty mbuf pool", rxq->port_id);
149                         rte_errno = ENOMEM;
150                         goto error;
151                 }
152                 if (i < wqe_n)
153                         (*rxq->mprq_bufs)[i] = buf;
154                 else
155                         rxq->mprq_repl = buf;
156         }
157         DRV_LOG(DEBUG,
158                 "port %u Rx queue %u allocated and configured %u segments",
159                 rxq->port_id, rxq_ctrl->idx, wqe_n);
160         return 0;
161 error:
162         err = rte_errno; /* Save rte_errno before cleanup. */
163         wqe_n = i;
164         for (i = 0; (i != wqe_n); ++i) {
165                 if ((*rxq->mprq_bufs)[i] != NULL)
166                         rte_mempool_put(rxq->mprq_mp,
167                                         (*rxq->mprq_bufs)[i]);
168                 (*rxq->mprq_bufs)[i] = NULL;
169         }
170         DRV_LOG(DEBUG, "port %u Rx queue %u failed, freed everything",
171                 rxq->port_id, rxq_ctrl->idx);
172         rte_errno = err; /* Restore rte_errno. */
173         return -rte_errno;
174 }
175
176 /**
177  * Allocate RX queue elements for Single-Packet RQ.
178  *
179  * @param rxq_ctrl
180  *   Pointer to RX queue structure.
181  *
182  * @return
183  *   0 on success, errno value on failure.
184  */
185 static int
186 rxq_alloc_elts_sprq(struct mlx5_rxq_ctrl *rxq_ctrl)
187 {
188         const unsigned int sges_n = 1 << rxq_ctrl->rxq.sges_n;
189         unsigned int elts_n = 1 << rxq_ctrl->rxq.elts_n;
190         unsigned int i;
191         int err;
192
193         /* Iterate on segments. */
194         for (i = 0; (i != elts_n); ++i) {
195                 struct rte_mbuf *buf;
196
197                 buf = rte_pktmbuf_alloc(rxq_ctrl->rxq.mp);
198                 if (buf == NULL) {
199                         DRV_LOG(ERR, "port %u empty mbuf pool",
200                                 PORT_ID(rxq_ctrl->priv));
201                         rte_errno = ENOMEM;
202                         goto error;
203                 }
204                 /* Headroom is reserved by rte_pktmbuf_alloc(). */
205                 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
206                 /* Buffer is supposed to be empty. */
207                 assert(rte_pktmbuf_data_len(buf) == 0);
208                 assert(rte_pktmbuf_pkt_len(buf) == 0);
209                 assert(!buf->next);
210                 /* Only the first segment keeps headroom. */
211                 if (i % sges_n)
212                         SET_DATA_OFF(buf, 0);
213                 PORT(buf) = rxq_ctrl->rxq.port_id;
214                 DATA_LEN(buf) = rte_pktmbuf_tailroom(buf);
215                 PKT_LEN(buf) = DATA_LEN(buf);
216                 NB_SEGS(buf) = 1;
217                 (*rxq_ctrl->rxq.elts)[i] = buf;
218         }
219         /* If Rx vector is activated. */
220         if (mlx5_rxq_check_vec_support(&rxq_ctrl->rxq) > 0) {
221                 struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
222                 struct rte_mbuf *mbuf_init = &rxq->fake_mbuf;
223                 int j;
224
225                 /* Initialize default rearm_data for vPMD. */
226                 mbuf_init->data_off = RTE_PKTMBUF_HEADROOM;
227                 rte_mbuf_refcnt_set(mbuf_init, 1);
228                 mbuf_init->nb_segs = 1;
229                 mbuf_init->port = rxq->port_id;
230                 /*
231                  * prevent compiler reordering:
232                  * rearm_data covers previous fields.
233                  */
234                 rte_compiler_barrier();
235                 rxq->mbuf_initializer =
236                         *(uint64_t *)&mbuf_init->rearm_data;
237                 /* Padding with a fake mbuf for vectorized Rx. */
238                 for (j = 0; j < MLX5_VPMD_DESCS_PER_LOOP; ++j)
239                         (*rxq->elts)[elts_n + j] = &rxq->fake_mbuf;
240         }
241         DRV_LOG(DEBUG,
242                 "port %u Rx queue %u allocated and configured %u segments"
243                 " (max %u packets)",
244                 PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx, elts_n,
245                 elts_n / (1 << rxq_ctrl->rxq.sges_n));
246         return 0;
247 error:
248         err = rte_errno; /* Save rte_errno before cleanup. */
249         elts_n = i;
250         for (i = 0; (i != elts_n); ++i) {
251                 if ((*rxq_ctrl->rxq.elts)[i] != NULL)
252                         rte_pktmbuf_free_seg((*rxq_ctrl->rxq.elts)[i]);
253                 (*rxq_ctrl->rxq.elts)[i] = NULL;
254         }
255         DRV_LOG(DEBUG, "port %u Rx queue %u failed, freed everything",
256                 PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx);
257         rte_errno = err; /* Restore rte_errno. */
258         return -rte_errno;
259 }
260
261 /**
262  * Allocate RX queue elements.
263  *
264  * @param rxq_ctrl
265  *   Pointer to RX queue structure.
266  *
267  * @return
268  *   0 on success, errno value on failure.
269  */
270 int
271 rxq_alloc_elts(struct mlx5_rxq_ctrl *rxq_ctrl)
272 {
273         return mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
274                rxq_alloc_elts_mprq(rxq_ctrl) : rxq_alloc_elts_sprq(rxq_ctrl);
275 }
276
277 /**
278  * Free RX queue elements for Multi-Packet RQ.
279  *
280  * @param rxq_ctrl
281  *   Pointer to RX queue structure.
282  */
283 static void
284 rxq_free_elts_mprq(struct mlx5_rxq_ctrl *rxq_ctrl)
285 {
286         struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
287         uint16_t i;
288
289         DRV_LOG(DEBUG, "port %u Multi-Packet Rx queue %u freeing WRs",
290                 rxq->port_id, rxq_ctrl->idx);
291         if (rxq->mprq_bufs == NULL)
292                 return;
293         assert(mlx5_rxq_check_vec_support(rxq) < 0);
294         for (i = 0; (i != (1u << rxq->elts_n)); ++i) {
295                 if ((*rxq->mprq_bufs)[i] != NULL)
296                         mlx5_mprq_buf_free((*rxq->mprq_bufs)[i]);
297                 (*rxq->mprq_bufs)[i] = NULL;
298         }
299         if (rxq->mprq_repl != NULL) {
300                 mlx5_mprq_buf_free(rxq->mprq_repl);
301                 rxq->mprq_repl = NULL;
302         }
303 }
304
305 /**
306  * Free RX queue elements for Single-Packet RQ.
307  *
308  * @param rxq_ctrl
309  *   Pointer to RX queue structure.
310  */
311 static void
312 rxq_free_elts_sprq(struct mlx5_rxq_ctrl *rxq_ctrl)
313 {
314         struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
315         const uint16_t q_n = (1 << rxq->elts_n);
316         const uint16_t q_mask = q_n - 1;
317         uint16_t used = q_n - (rxq->rq_ci - rxq->rq_pi);
318         uint16_t i;
319
320         DRV_LOG(DEBUG, "port %u Rx queue %u freeing WRs",
321                 PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx);
322         if (rxq->elts == NULL)
323                 return;
324         /**
325          * Some mbuf in the Ring belongs to the application.  They cannot be
326          * freed.
327          */
328         if (mlx5_rxq_check_vec_support(rxq) > 0) {
329                 for (i = 0; i < used; ++i)
330                         (*rxq->elts)[(rxq->rq_ci + i) & q_mask] = NULL;
331                 rxq->rq_pi = rxq->rq_ci;
332         }
333         for (i = 0; (i != (1u << rxq->elts_n)); ++i) {
334                 if ((*rxq->elts)[i] != NULL)
335                         rte_pktmbuf_free_seg((*rxq->elts)[i]);
336                 (*rxq->elts)[i] = NULL;
337         }
338 }
339
340 /**
341  * Free RX queue elements.
342  *
343  * @param rxq_ctrl
344  *   Pointer to RX queue structure.
345  */
346 static void
347 rxq_free_elts(struct mlx5_rxq_ctrl *rxq_ctrl)
348 {
349         if (mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq))
350                 rxq_free_elts_mprq(rxq_ctrl);
351         else
352                 rxq_free_elts_sprq(rxq_ctrl);
353 }
354
355 /**
356  * Clean up a RX queue.
357  *
358  * Destroy objects, free allocated memory and reset the structure for reuse.
359  *
360  * @param rxq_ctrl
361  *   Pointer to RX queue structure.
362  */
363 void
364 mlx5_rxq_cleanup(struct mlx5_rxq_ctrl *rxq_ctrl)
365 {
366         DRV_LOG(DEBUG, "port %u cleaning up Rx queue %u",
367                 PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx);
368         if (rxq_ctrl->ibv)
369                 mlx5_rxq_ibv_release(rxq_ctrl->ibv);
370         memset(rxq_ctrl, 0, sizeof(*rxq_ctrl));
371 }
372
373 /**
374  * Returns the per-queue supported offloads.
375  *
376  * @param dev
377  *   Pointer to Ethernet device.
378  *
379  * @return
380  *   Supported Rx offloads.
381  */
382 uint64_t
383 mlx5_get_rx_queue_offloads(struct rte_eth_dev *dev)
384 {
385         struct priv *priv = dev->data->dev_private;
386         struct mlx5_dev_config *config = &priv->config;
387         uint64_t offloads = (DEV_RX_OFFLOAD_SCATTER |
388                              DEV_RX_OFFLOAD_TIMESTAMP |
389                              DEV_RX_OFFLOAD_JUMBO_FRAME);
390
391         offloads |= DEV_RX_OFFLOAD_CRC_STRIP;
392         if (config->hw_fcs_strip)
393                 offloads |= DEV_RX_OFFLOAD_KEEP_CRC;
394
395         if (config->hw_csum)
396                 offloads |= (DEV_RX_OFFLOAD_IPV4_CKSUM |
397                              DEV_RX_OFFLOAD_UDP_CKSUM |
398                              DEV_RX_OFFLOAD_TCP_CKSUM);
399         if (config->hw_vlan_strip)
400                 offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
401         return offloads;
402 }
403
404
405 /**
406  * Returns the per-port supported offloads.
407  *
408  * @return
409  *   Supported Rx offloads.
410  */
411 uint64_t
412 mlx5_get_rx_port_offloads(void)
413 {
414         uint64_t offloads = DEV_RX_OFFLOAD_VLAN_FILTER;
415
416         return offloads;
417 }
418
419 /**
420  *
421  * @param dev
422  *   Pointer to Ethernet device structure.
423  * @param idx
424  *   RX queue index.
425  * @param desc
426  *   Number of descriptors to configure in queue.
427  * @param socket
428  *   NUMA socket on which memory must be allocated.
429  * @param[in] conf
430  *   Thresholds parameters.
431  * @param mp
432  *   Memory pool for buffer allocations.
433  *
434  * @return
435  *   0 on success, a negative errno value otherwise and rte_errno is set.
436  */
437 int
438 mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
439                     unsigned int socket, const struct rte_eth_rxconf *conf,
440                     struct rte_mempool *mp)
441 {
442         struct priv *priv = dev->data->dev_private;
443         struct mlx5_rxq_data *rxq = (*priv->rxqs)[idx];
444         struct mlx5_rxq_ctrl *rxq_ctrl =
445                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
446
447         if (!rte_is_power_of_2(desc)) {
448                 desc = 1 << log2above(desc);
449                 DRV_LOG(WARNING,
450                         "port %u increased number of descriptors in Rx queue %u"
451                         " to the next power of two (%d)",
452                         dev->data->port_id, idx, desc);
453         }
454         DRV_LOG(DEBUG, "port %u configuring Rx queue %u for %u descriptors",
455                 dev->data->port_id, idx, desc);
456         if (idx >= priv->rxqs_n) {
457                 DRV_LOG(ERR, "port %u Rx queue index out of range (%u >= %u)",
458                         dev->data->port_id, idx, priv->rxqs_n);
459                 rte_errno = EOVERFLOW;
460                 return -rte_errno;
461         }
462         if (!mlx5_rxq_releasable(dev, idx)) {
463                 DRV_LOG(ERR, "port %u unable to release queue index %u",
464                         dev->data->port_id, idx);
465                 rte_errno = EBUSY;
466                 return -rte_errno;
467         }
468         mlx5_rxq_release(dev, idx);
469         rxq_ctrl = mlx5_rxq_new(dev, idx, desc, socket, conf, mp);
470         if (!rxq_ctrl) {
471                 DRV_LOG(ERR, "port %u unable to allocate queue index %u",
472                         dev->data->port_id, idx);
473                 rte_errno = ENOMEM;
474                 return -rte_errno;
475         }
476         DRV_LOG(DEBUG, "port %u adding Rx queue %u to list",
477                 dev->data->port_id, idx);
478         (*priv->rxqs)[idx] = &rxq_ctrl->rxq;
479         return 0;
480 }
481
482 /**
483  * DPDK callback to release a RX queue.
484  *
485  * @param dpdk_rxq
486  *   Generic RX queue pointer.
487  */
488 void
489 mlx5_rx_queue_release(void *dpdk_rxq)
490 {
491         struct mlx5_rxq_data *rxq = (struct mlx5_rxq_data *)dpdk_rxq;
492         struct mlx5_rxq_ctrl *rxq_ctrl;
493         struct priv *priv;
494
495         if (rxq == NULL)
496                 return;
497         rxq_ctrl = container_of(rxq, struct mlx5_rxq_ctrl, rxq);
498         priv = rxq_ctrl->priv;
499         if (!mlx5_rxq_releasable(ETH_DEV(priv), rxq_ctrl->rxq.stats.idx))
500                 rte_panic("port %u Rx queue %u is still used by a flow and"
501                           " cannot be removed\n",
502                           PORT_ID(priv), rxq_ctrl->idx);
503         mlx5_rxq_release(ETH_DEV(priv), rxq_ctrl->rxq.stats.idx);
504 }
505
506 /**
507  * Allocate queue vector and fill epoll fd list for Rx interrupts.
508  *
509  * @param dev
510  *   Pointer to Ethernet device.
511  *
512  * @return
513  *   0 on success, a negative errno value otherwise and rte_errno is set.
514  */
515 int
516 mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev)
517 {
518         struct priv *priv = dev->data->dev_private;
519         unsigned int i;
520         unsigned int rxqs_n = priv->rxqs_n;
521         unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
522         unsigned int count = 0;
523         struct rte_intr_handle *intr_handle = dev->intr_handle;
524
525         if (!dev->data->dev_conf.intr_conf.rxq)
526                 return 0;
527         mlx5_rx_intr_vec_disable(dev);
528         intr_handle->intr_vec = malloc(n * sizeof(intr_handle->intr_vec[0]));
529         if (intr_handle->intr_vec == NULL) {
530                 DRV_LOG(ERR,
531                         "port %u failed to allocate memory for interrupt"
532                         " vector, Rx interrupts will not be supported",
533                         dev->data->port_id);
534                 rte_errno = ENOMEM;
535                 return -rte_errno;
536         }
537         intr_handle->type = RTE_INTR_HANDLE_EXT;
538         for (i = 0; i != n; ++i) {
539                 /* This rxq ibv must not be released in this function. */
540                 struct mlx5_rxq_ibv *rxq_ibv = mlx5_rxq_ibv_get(dev, i);
541                 int fd;
542                 int flags;
543                 int rc;
544
545                 /* Skip queues that cannot request interrupts. */
546                 if (!rxq_ibv || !rxq_ibv->channel) {
547                         /* Use invalid intr_vec[] index to disable entry. */
548                         intr_handle->intr_vec[i] =
549                                 RTE_INTR_VEC_RXTX_OFFSET +
550                                 RTE_MAX_RXTX_INTR_VEC_ID;
551                         continue;
552                 }
553                 if (count >= RTE_MAX_RXTX_INTR_VEC_ID) {
554                         DRV_LOG(ERR,
555                                 "port %u too many Rx queues for interrupt"
556                                 " vector size (%d), Rx interrupts cannot be"
557                                 " enabled",
558                                 dev->data->port_id, RTE_MAX_RXTX_INTR_VEC_ID);
559                         mlx5_rx_intr_vec_disable(dev);
560                         rte_errno = ENOMEM;
561                         return -rte_errno;
562                 }
563                 fd = rxq_ibv->channel->fd;
564                 flags = fcntl(fd, F_GETFL);
565                 rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
566                 if (rc < 0) {
567                         rte_errno = errno;
568                         DRV_LOG(ERR,
569                                 "port %u failed to make Rx interrupt file"
570                                 " descriptor %d non-blocking for queue index"
571                                 " %d",
572                                 dev->data->port_id, fd, i);
573                         mlx5_rx_intr_vec_disable(dev);
574                         return -rte_errno;
575                 }
576                 intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count;
577                 intr_handle->efds[count] = fd;
578                 count++;
579         }
580         if (!count)
581                 mlx5_rx_intr_vec_disable(dev);
582         else
583                 intr_handle->nb_efd = count;
584         return 0;
585 }
586
587 /**
588  * Clean up Rx interrupts handler.
589  *
590  * @param dev
591  *   Pointer to Ethernet device.
592  */
593 void
594 mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev)
595 {
596         struct priv *priv = dev->data->dev_private;
597         struct rte_intr_handle *intr_handle = dev->intr_handle;
598         unsigned int i;
599         unsigned int rxqs_n = priv->rxqs_n;
600         unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
601
602         if (!dev->data->dev_conf.intr_conf.rxq)
603                 return;
604         if (!intr_handle->intr_vec)
605                 goto free;
606         for (i = 0; i != n; ++i) {
607                 struct mlx5_rxq_ctrl *rxq_ctrl;
608                 struct mlx5_rxq_data *rxq_data;
609
610                 if (intr_handle->intr_vec[i] == RTE_INTR_VEC_RXTX_OFFSET +
611                     RTE_MAX_RXTX_INTR_VEC_ID)
612                         continue;
613                 /**
614                  * Need to access directly the queue to release the reference
615                  * kept in priv_rx_intr_vec_enable().
616                  */
617                 rxq_data = (*priv->rxqs)[i];
618                 rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
619                 mlx5_rxq_ibv_release(rxq_ctrl->ibv);
620         }
621 free:
622         rte_intr_free_epoll_fd(intr_handle);
623         if (intr_handle->intr_vec)
624                 free(intr_handle->intr_vec);
625         intr_handle->nb_efd = 0;
626         intr_handle->intr_vec = NULL;
627 }
628
629 /**
630  *  MLX5 CQ notification .
631  *
632  *  @param rxq
633  *     Pointer to receive queue structure.
634  *  @param sq_n_rxq
635  *     Sequence number per receive queue .
636  */
637 static inline void
638 mlx5_arm_cq(struct mlx5_rxq_data *rxq, int sq_n_rxq)
639 {
640         int sq_n = 0;
641         uint32_t doorbell_hi;
642         uint64_t doorbell;
643         void *cq_db_reg = (char *)rxq->cq_uar + MLX5_CQ_DOORBELL;
644
645         sq_n = sq_n_rxq & MLX5_CQ_SQN_MASK;
646         doorbell_hi = sq_n << MLX5_CQ_SQN_OFFSET | (rxq->cq_ci & MLX5_CI_MASK);
647         doorbell = (uint64_t)doorbell_hi << 32;
648         doorbell |=  rxq->cqn;
649         rxq->cq_db[MLX5_CQ_ARM_DB] = rte_cpu_to_be_32(doorbell_hi);
650         mlx5_uar_write64(rte_cpu_to_be_64(doorbell),
651                          cq_db_reg, rxq->uar_lock_cq);
652 }
653
654 /**
655  * DPDK callback for Rx queue interrupt enable.
656  *
657  * @param dev
658  *   Pointer to Ethernet device structure.
659  * @param rx_queue_id
660  *   Rx queue number.
661  *
662  * @return
663  *   0 on success, a negative errno value otherwise and rte_errno is set.
664  */
665 int
666 mlx5_rx_intr_enable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
667 {
668         struct priv *priv = dev->data->dev_private;
669         struct mlx5_rxq_data *rxq_data;
670         struct mlx5_rxq_ctrl *rxq_ctrl;
671
672         rxq_data = (*priv->rxqs)[rx_queue_id];
673         if (!rxq_data) {
674                 rte_errno = EINVAL;
675                 return -rte_errno;
676         }
677         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
678         if (rxq_ctrl->irq) {
679                 struct mlx5_rxq_ibv *rxq_ibv;
680
681                 rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id);
682                 if (!rxq_ibv) {
683                         rte_errno = EINVAL;
684                         return -rte_errno;
685                 }
686                 mlx5_arm_cq(rxq_data, rxq_data->cq_arm_sn);
687                 mlx5_rxq_ibv_release(rxq_ibv);
688         }
689         return 0;
690 }
691
692 /**
693  * DPDK callback for Rx queue interrupt disable.
694  *
695  * @param dev
696  *   Pointer to Ethernet device structure.
697  * @param rx_queue_id
698  *   Rx queue number.
699  *
700  * @return
701  *   0 on success, a negative errno value otherwise and rte_errno is set.
702  */
703 int
704 mlx5_rx_intr_disable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
705 {
706         struct priv *priv = dev->data->dev_private;
707         struct mlx5_rxq_data *rxq_data;
708         struct mlx5_rxq_ctrl *rxq_ctrl;
709         struct mlx5_rxq_ibv *rxq_ibv = NULL;
710         struct ibv_cq *ev_cq;
711         void *ev_ctx;
712         int ret;
713
714         rxq_data = (*priv->rxqs)[rx_queue_id];
715         if (!rxq_data) {
716                 rte_errno = EINVAL;
717                 return -rte_errno;
718         }
719         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
720         if (!rxq_ctrl->irq)
721                 return 0;
722         rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id);
723         if (!rxq_ibv) {
724                 rte_errno = EINVAL;
725                 return -rte_errno;
726         }
727         ret = mlx5_glue->get_cq_event(rxq_ibv->channel, &ev_cq, &ev_ctx);
728         if (ret || ev_cq != rxq_ibv->cq) {
729                 rte_errno = EINVAL;
730                 goto exit;
731         }
732         rxq_data->cq_arm_sn++;
733         mlx5_glue->ack_cq_events(rxq_ibv->cq, 1);
734         return 0;
735 exit:
736         ret = rte_errno; /* Save rte_errno before cleanup. */
737         if (rxq_ibv)
738                 mlx5_rxq_ibv_release(rxq_ibv);
739         DRV_LOG(WARNING, "port %u unable to disable interrupt on Rx queue %d",
740                 dev->data->port_id, rx_queue_id);
741         rte_errno = ret; /* Restore rte_errno. */
742         return -rte_errno;
743 }
744
745 /**
746  * Create the Rx queue Verbs object.
747  *
748  * @param dev
749  *   Pointer to Ethernet device.
750  * @param idx
751  *   Queue index in DPDK Rx queue array
752  *
753  * @return
754  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
755  */
756 struct mlx5_rxq_ibv *
757 mlx5_rxq_ibv_new(struct rte_eth_dev *dev, uint16_t idx)
758 {
759         struct priv *priv = dev->data->dev_private;
760         struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx];
761         struct mlx5_rxq_ctrl *rxq_ctrl =
762                 container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
763         struct ibv_wq_attr mod;
764         union {
765                 struct {
766                         struct ibv_cq_init_attr_ex ibv;
767                         struct mlx5dv_cq_init_attr mlx5;
768                 } cq;
769                 struct {
770                         struct ibv_wq_init_attr ibv;
771 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
772                         struct mlx5dv_wq_init_attr mlx5;
773 #endif
774                 } wq;
775                 struct ibv_cq_ex cq_attr;
776         } attr;
777         unsigned int cqe_n;
778         unsigned int wqe_n = 1 << rxq_data->elts_n;
779         struct mlx5_rxq_ibv *tmpl;
780         struct mlx5dv_cq cq_info;
781         struct mlx5dv_rwq rwq;
782         unsigned int i;
783         int ret = 0;
784         struct mlx5dv_obj obj;
785         struct mlx5_dev_config *config = &priv->config;
786         const int mprq_en = mlx5_rxq_mprq_enabled(rxq_data);
787
788         assert(rxq_data);
789         assert(!rxq_ctrl->ibv);
790         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_RX_QUEUE;
791         priv->verbs_alloc_ctx.obj = rxq_ctrl;
792         tmpl = rte_calloc_socket(__func__, 1, sizeof(*tmpl), 0,
793                                  rxq_ctrl->socket);
794         if (!tmpl) {
795                 DRV_LOG(ERR,
796                         "port %u Rx queue %u cannot allocate verbs resources",
797                         dev->data->port_id, rxq_ctrl->idx);
798                 rte_errno = ENOMEM;
799                 goto error;
800         }
801         tmpl->rxq_ctrl = rxq_ctrl;
802         if (rxq_ctrl->irq) {
803                 tmpl->channel = mlx5_glue->create_comp_channel(priv->ctx);
804                 if (!tmpl->channel) {
805                         DRV_LOG(ERR, "port %u: comp channel creation failure",
806                                 dev->data->port_id);
807                         rte_errno = ENOMEM;
808                         goto error;
809                 }
810         }
811         if (mprq_en)
812                 cqe_n = wqe_n * (1 << rxq_data->strd_num_n) - 1;
813         else
814                 cqe_n = wqe_n  - 1;
815         attr.cq.ibv = (struct ibv_cq_init_attr_ex){
816                 .cqe = cqe_n,
817                 .channel = tmpl->channel,
818                 .comp_mask = 0,
819         };
820         attr.cq.mlx5 = (struct mlx5dv_cq_init_attr){
821                 .comp_mask = 0,
822         };
823         if (config->cqe_comp && !rxq_data->hw_timestamp) {
824                 attr.cq.mlx5.comp_mask |=
825                         MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE;
826 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
827                 attr.cq.mlx5.cqe_comp_res_format =
828                         mprq_en ? MLX5DV_CQE_RES_FORMAT_CSUM_STRIDX :
829                                   MLX5DV_CQE_RES_FORMAT_HASH;
830 #else
831                 attr.cq.mlx5.cqe_comp_res_format = MLX5DV_CQE_RES_FORMAT_HASH;
832 #endif
833                 /*
834                  * For vectorized Rx, it must not be doubled in order to
835                  * make cq_ci and rq_ci aligned.
836                  */
837                 if (mlx5_rxq_check_vec_support(rxq_data) < 0)
838                         attr.cq.ibv.cqe *= 2;
839         } else if (config->cqe_comp && rxq_data->hw_timestamp) {
840                 DRV_LOG(DEBUG,
841                         "port %u Rx CQE compression is disabled for HW"
842                         " timestamp",
843                         dev->data->port_id);
844         }
845         tmpl->cq = mlx5_glue->cq_ex_to_cq
846                 (mlx5_glue->dv_create_cq(priv->ctx, &attr.cq.ibv,
847                                          &attr.cq.mlx5));
848         if (tmpl->cq == NULL) {
849                 DRV_LOG(ERR, "port %u Rx queue %u CQ creation failure",
850                         dev->data->port_id, idx);
851                 rte_errno = ENOMEM;
852                 goto error;
853         }
854         DRV_LOG(DEBUG, "port %u priv->device_attr.max_qp_wr is %d",
855                 dev->data->port_id, priv->device_attr.orig_attr.max_qp_wr);
856         DRV_LOG(DEBUG, "port %u priv->device_attr.max_sge is %d",
857                 dev->data->port_id, priv->device_attr.orig_attr.max_sge);
858         attr.wq.ibv = (struct ibv_wq_init_attr){
859                 .wq_context = NULL, /* Could be useful in the future. */
860                 .wq_type = IBV_WQT_RQ,
861                 /* Max number of outstanding WRs. */
862                 .max_wr = wqe_n >> rxq_data->sges_n,
863                 /* Max number of scatter/gather elements in a WR. */
864                 .max_sge = 1 << rxq_data->sges_n,
865                 .pd = priv->pd,
866                 .cq = tmpl->cq,
867                 .comp_mask =
868                         IBV_WQ_FLAGS_CVLAN_STRIPPING |
869                         0,
870                 .create_flags = (rxq_data->vlan_strip ?
871                                  IBV_WQ_FLAGS_CVLAN_STRIPPING :
872                                  0),
873         };
874         /* By default, FCS (CRC) is stripped by hardware. */
875         if (rxq_data->crc_present) {
876                 attr.wq.ibv.create_flags |= IBV_WQ_FLAGS_SCATTER_FCS;
877                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
878         }
879 #ifdef HAVE_IBV_WQ_FLAG_RX_END_PADDING
880         if (config->hw_padding) {
881                 attr.wq.ibv.create_flags |= IBV_WQ_FLAG_RX_END_PADDING;
882                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
883         }
884 #endif
885 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
886         attr.wq.mlx5 = (struct mlx5dv_wq_init_attr){
887                 .comp_mask = 0,
888         };
889         if (mprq_en) {
890                 struct mlx5dv_striding_rq_init_attr *mprq_attr =
891                         &attr.wq.mlx5.striding_rq_attrs;
892
893                 attr.wq.mlx5.comp_mask |= MLX5DV_WQ_INIT_ATTR_MASK_STRIDING_RQ;
894                 *mprq_attr = (struct mlx5dv_striding_rq_init_attr){
895                         .single_stride_log_num_of_bytes = rxq_data->strd_sz_n,
896                         .single_wqe_log_num_of_strides = rxq_data->strd_num_n,
897                         .two_byte_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT,
898                 };
899         }
900         tmpl->wq = mlx5_glue->dv_create_wq(priv->ctx, &attr.wq.ibv,
901                                            &attr.wq.mlx5);
902 #else
903         tmpl->wq = mlx5_glue->create_wq(priv->ctx, &attr.wq.ibv);
904 #endif
905         if (tmpl->wq == NULL) {
906                 DRV_LOG(ERR, "port %u Rx queue %u WQ creation failure",
907                         dev->data->port_id, idx);
908                 rte_errno = ENOMEM;
909                 goto error;
910         }
911         /*
912          * Make sure number of WRs*SGEs match expectations since a queue
913          * cannot allocate more than "desc" buffers.
914          */
915         if (attr.wq.ibv.max_wr != (wqe_n >> rxq_data->sges_n) ||
916             attr.wq.ibv.max_sge != (1u << rxq_data->sges_n)) {
917                 DRV_LOG(ERR,
918                         "port %u Rx queue %u requested %u*%u but got %u*%u"
919                         " WRs*SGEs",
920                         dev->data->port_id, idx,
921                         wqe_n >> rxq_data->sges_n, (1 << rxq_data->sges_n),
922                         attr.wq.ibv.max_wr, attr.wq.ibv.max_sge);
923                 rte_errno = EINVAL;
924                 goto error;
925         }
926         /* Change queue state to ready. */
927         mod = (struct ibv_wq_attr){
928                 .attr_mask = IBV_WQ_ATTR_STATE,
929                 .wq_state = IBV_WQS_RDY,
930         };
931         ret = mlx5_glue->modify_wq(tmpl->wq, &mod);
932         if (ret) {
933                 DRV_LOG(ERR,
934                         "port %u Rx queue %u WQ state to IBV_WQS_RDY failed",
935                         dev->data->port_id, idx);
936                 rte_errno = ret;
937                 goto error;
938         }
939         obj.cq.in = tmpl->cq;
940         obj.cq.out = &cq_info;
941         obj.rwq.in = tmpl->wq;
942         obj.rwq.out = &rwq;
943         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_CQ | MLX5DV_OBJ_RWQ);
944         if (ret) {
945                 rte_errno = ret;
946                 goto error;
947         }
948         if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) {
949                 DRV_LOG(ERR,
950                         "port %u wrong MLX5_CQE_SIZE environment variable"
951                         " value: it should be set to %u",
952                         dev->data->port_id, RTE_CACHE_LINE_SIZE);
953                 rte_errno = EINVAL;
954                 goto error;
955         }
956         /* Fill the rings. */
957         rxq_data->wqes = rwq.buf;
958         for (i = 0; (i != wqe_n); ++i) {
959                 volatile struct mlx5_wqe_data_seg *scat;
960                 uintptr_t addr;
961                 uint32_t byte_count;
962
963                 if (mprq_en) {
964                         struct mlx5_mprq_buf *buf = (*rxq_data->mprq_bufs)[i];
965
966                         scat = &((volatile struct mlx5_wqe_mprq *)
967                                  rxq_data->wqes)[i].dseg;
968                         addr = (uintptr_t)mlx5_mprq_buf_addr(buf);
969                         byte_count = (1 << rxq_data->strd_sz_n) *
970                                      (1 << rxq_data->strd_num_n);
971                 } else {
972                         struct rte_mbuf *buf = (*rxq_data->elts)[i];
973
974                         scat = &((volatile struct mlx5_wqe_data_seg *)
975                                  rxq_data->wqes)[i];
976                         addr = rte_pktmbuf_mtod(buf, uintptr_t);
977                         byte_count = DATA_LEN(buf);
978                 }
979                 /* scat->addr must be able to store a pointer. */
980                 assert(sizeof(scat->addr) >= sizeof(uintptr_t));
981                 *scat = (struct mlx5_wqe_data_seg){
982                         .addr = rte_cpu_to_be_64(addr),
983                         .byte_count = rte_cpu_to_be_32(byte_count),
984                         .lkey = mlx5_rx_addr2mr(rxq_data, addr),
985                 };
986         }
987         rxq_data->rq_db = rwq.dbrec;
988         rxq_data->cqe_n = log2above(cq_info.cqe_cnt);
989         rxq_data->cq_ci = 0;
990         rxq_data->consumed_strd = 0;
991         rxq_data->rq_pi = 0;
992         rxq_data->zip = (struct rxq_zip){
993                 .ai = 0,
994         };
995         rxq_data->cq_db = cq_info.dbrec;
996         rxq_data->cqes = (volatile struct mlx5_cqe (*)[])(uintptr_t)cq_info.buf;
997         rxq_data->cq_uar = cq_info.cq_uar;
998         rxq_data->cqn = cq_info.cqn;
999         rxq_data->cq_arm_sn = 0;
1000         /* Update doorbell counter. */
1001         rxq_data->rq_ci = wqe_n >> rxq_data->sges_n;
1002         rte_wmb();
1003         *rxq_data->rq_db = rte_cpu_to_be_32(rxq_data->rq_ci);
1004         DRV_LOG(DEBUG, "port %u rxq %u updated with %p", dev->data->port_id,
1005                 idx, (void *)&tmpl);
1006         rte_atomic32_inc(&tmpl->refcnt);
1007         LIST_INSERT_HEAD(&priv->rxqsibv, tmpl, next);
1008         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE;
1009         return tmpl;
1010 error:
1011         ret = rte_errno; /* Save rte_errno before cleanup. */
1012         if (tmpl->wq)
1013                 claim_zero(mlx5_glue->destroy_wq(tmpl->wq));
1014         if (tmpl->cq)
1015                 claim_zero(mlx5_glue->destroy_cq(tmpl->cq));
1016         if (tmpl->channel)
1017                 claim_zero(mlx5_glue->destroy_comp_channel(tmpl->channel));
1018         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE;
1019         rte_errno = ret; /* Restore rte_errno. */
1020         return NULL;
1021 }
1022
1023 /**
1024  * Get an Rx queue Verbs object.
1025  *
1026  * @param dev
1027  *   Pointer to Ethernet device.
1028  * @param idx
1029  *   Queue index in DPDK Rx queue array
1030  *
1031  * @return
1032  *   The Verbs object if it exists.
1033  */
1034 struct mlx5_rxq_ibv *
1035 mlx5_rxq_ibv_get(struct rte_eth_dev *dev, uint16_t idx)
1036 {
1037         struct priv *priv = dev->data->dev_private;
1038         struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx];
1039         struct mlx5_rxq_ctrl *rxq_ctrl;
1040
1041         if (idx >= priv->rxqs_n)
1042                 return NULL;
1043         if (!rxq_data)
1044                 return NULL;
1045         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
1046         if (rxq_ctrl->ibv) {
1047                 rte_atomic32_inc(&rxq_ctrl->ibv->refcnt);
1048         }
1049         return rxq_ctrl->ibv;
1050 }
1051
1052 /**
1053  * Release an Rx verbs queue object.
1054  *
1055  * @param rxq_ibv
1056  *   Verbs Rx queue object.
1057  *
1058  * @return
1059  *   1 while a reference on it exists, 0 when freed.
1060  */
1061 int
1062 mlx5_rxq_ibv_release(struct mlx5_rxq_ibv *rxq_ibv)
1063 {
1064         assert(rxq_ibv);
1065         assert(rxq_ibv->wq);
1066         assert(rxq_ibv->cq);
1067         if (rte_atomic32_dec_and_test(&rxq_ibv->refcnt)) {
1068                 rxq_free_elts(rxq_ibv->rxq_ctrl);
1069                 claim_zero(mlx5_glue->destroy_wq(rxq_ibv->wq));
1070                 claim_zero(mlx5_glue->destroy_cq(rxq_ibv->cq));
1071                 if (rxq_ibv->channel)
1072                         claim_zero(mlx5_glue->destroy_comp_channel
1073                                    (rxq_ibv->channel));
1074                 LIST_REMOVE(rxq_ibv, next);
1075                 rte_free(rxq_ibv);
1076                 return 0;
1077         }
1078         return 1;
1079 }
1080
1081 /**
1082  * Verify the Verbs Rx queue list is empty
1083  *
1084  * @param dev
1085  *   Pointer to Ethernet device.
1086  *
1087  * @return
1088  *   The number of object not released.
1089  */
1090 int
1091 mlx5_rxq_ibv_verify(struct rte_eth_dev *dev)
1092 {
1093         struct priv *priv = dev->data->dev_private;
1094         int ret = 0;
1095         struct mlx5_rxq_ibv *rxq_ibv;
1096
1097         LIST_FOREACH(rxq_ibv, &priv->rxqsibv, next) {
1098                 DRV_LOG(DEBUG, "port %u Verbs Rx queue %u still referenced",
1099                         dev->data->port_id, rxq_ibv->rxq_ctrl->idx);
1100                 ++ret;
1101         }
1102         return ret;
1103 }
1104
1105 /**
1106  * Return true if a single reference exists on the object.
1107  *
1108  * @param rxq_ibv
1109  *   Verbs Rx queue object.
1110  */
1111 int
1112 mlx5_rxq_ibv_releasable(struct mlx5_rxq_ibv *rxq_ibv)
1113 {
1114         assert(rxq_ibv);
1115         return (rte_atomic32_read(&rxq_ibv->refcnt) == 1);
1116 }
1117
1118 /**
1119  * Callback function to initialize mbufs for Multi-Packet RQ.
1120  */
1121 static inline void
1122 mlx5_mprq_buf_init(struct rte_mempool *mp, void *opaque_arg __rte_unused,
1123                     void *_m, unsigned int i __rte_unused)
1124 {
1125         struct mlx5_mprq_buf *buf = _m;
1126
1127         memset(_m, 0, sizeof(*buf));
1128         buf->mp = mp;
1129         rte_atomic16_set(&buf->refcnt, 1);
1130 }
1131
1132 /**
1133  * Free mempool of Multi-Packet RQ.
1134  *
1135  * @param dev
1136  *   Pointer to Ethernet device.
1137  *
1138  * @return
1139  *   0 on success, negative errno value on failure.
1140  */
1141 int
1142 mlx5_mprq_free_mp(struct rte_eth_dev *dev)
1143 {
1144         struct priv *priv = dev->data->dev_private;
1145         struct rte_mempool *mp = priv->mprq_mp;
1146         unsigned int i;
1147
1148         if (mp == NULL)
1149                 return 0;
1150         DRV_LOG(DEBUG, "port %u freeing mempool (%s) for Multi-Packet RQ",
1151                 dev->data->port_id, mp->name);
1152         /*
1153          * If a buffer in the pool has been externally attached to a mbuf and it
1154          * is still in use by application, destroying the Rx qeueue can spoil
1155          * the packet. It is unlikely to happen but if application dynamically
1156          * creates and destroys with holding Rx packets, this can happen.
1157          *
1158          * TODO: It is unavoidable for now because the mempool for Multi-Packet
1159          * RQ isn't provided by application but managed by PMD.
1160          */
1161         if (!rte_mempool_full(mp)) {
1162                 DRV_LOG(ERR,
1163                         "port %u mempool for Multi-Packet RQ is still in use",
1164                         dev->data->port_id);
1165                 rte_errno = EBUSY;
1166                 return -rte_errno;
1167         }
1168         rte_mempool_free(mp);
1169         /* Unset mempool for each Rx queue. */
1170         for (i = 0; i != priv->rxqs_n; ++i) {
1171                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1172
1173                 if (rxq == NULL)
1174                         continue;
1175                 rxq->mprq_mp = NULL;
1176         }
1177         return 0;
1178 }
1179
1180 /**
1181  * Allocate a mempool for Multi-Packet RQ. All configured Rx queues share the
1182  * mempool. If already allocated, reuse it if there're enough elements.
1183  * Otherwise, resize it.
1184  *
1185  * @param dev
1186  *   Pointer to Ethernet device.
1187  *
1188  * @return
1189  *   0 on success, negative errno value on failure.
1190  */
1191 int
1192 mlx5_mprq_alloc_mp(struct rte_eth_dev *dev)
1193 {
1194         struct priv *priv = dev->data->dev_private;
1195         struct rte_mempool *mp = priv->mprq_mp;
1196         char name[RTE_MEMPOOL_NAMESIZE];
1197         unsigned int desc = 0;
1198         unsigned int buf_len;
1199         unsigned int obj_num;
1200         unsigned int obj_size;
1201         unsigned int strd_num_n = 0;
1202         unsigned int strd_sz_n = 0;
1203         unsigned int i;
1204
1205         if (!mlx5_mprq_enabled(dev))
1206                 return 0;
1207         /* Count the total number of descriptors configured. */
1208         for (i = 0; i != priv->rxqs_n; ++i) {
1209                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1210
1211                 if (rxq == NULL)
1212                         continue;
1213                 desc += 1 << rxq->elts_n;
1214                 /* Get the max number of strides. */
1215                 if (strd_num_n < rxq->strd_num_n)
1216                         strd_num_n = rxq->strd_num_n;
1217                 /* Get the max size of a stride. */
1218                 if (strd_sz_n < rxq->strd_sz_n)
1219                         strd_sz_n = rxq->strd_sz_n;
1220         }
1221         assert(strd_num_n && strd_sz_n);
1222         buf_len = (1 << strd_num_n) * (1 << strd_sz_n);
1223         obj_size = buf_len + sizeof(struct mlx5_mprq_buf);
1224         /*
1225          * Received packets can be either memcpy'd or externally referenced. In
1226          * case that the packet is attached to an mbuf as an external buffer, as
1227          * it isn't possible to predict how the buffers will be queued by
1228          * application, there's no option to exactly pre-allocate needed buffers
1229          * in advance but to speculatively prepares enough buffers.
1230          *
1231          * In the data path, if this Mempool is depleted, PMD will try to memcpy
1232          * received packets to buffers provided by application (rxq->mp) until
1233          * this Mempool gets available again.
1234          */
1235         desc *= 4;
1236         obj_num = desc + MLX5_MPRQ_MP_CACHE_SZ * priv->rxqs_n;
1237         /*
1238          * rte_mempool_create_empty() has sanity check to refuse large cache
1239          * size compared to the number of elements.
1240          * CACHE_FLUSHTHRESH_MULTIPLIER is defined in a C file, so using a
1241          * constant number 2 instead.
1242          */
1243         obj_num = RTE_MAX(obj_num, MLX5_MPRQ_MP_CACHE_SZ * 2);
1244         /* Check a mempool is already allocated and if it can be resued. */
1245         if (mp != NULL && mp->elt_size >= obj_size && mp->size >= obj_num) {
1246                 DRV_LOG(DEBUG, "port %u mempool %s is being reused",
1247                         dev->data->port_id, mp->name);
1248                 /* Reuse. */
1249                 goto exit;
1250         } else if (mp != NULL) {
1251                 DRV_LOG(DEBUG, "port %u mempool %s should be resized, freeing it",
1252                         dev->data->port_id, mp->name);
1253                 /*
1254                  * If failed to free, which means it may be still in use, no way
1255                  * but to keep using the existing one. On buffer underrun,
1256                  * packets will be memcpy'd instead of external buffer
1257                  * attachment.
1258                  */
1259                 if (mlx5_mprq_free_mp(dev)) {
1260                         if (mp->elt_size >= obj_size)
1261                                 goto exit;
1262                         else
1263                                 return -rte_errno;
1264                 }
1265         }
1266         snprintf(name, sizeof(name), "%s-mprq", dev->device->name);
1267         mp = rte_mempool_create(name, obj_num, obj_size, MLX5_MPRQ_MP_CACHE_SZ,
1268                                 0, NULL, NULL, mlx5_mprq_buf_init, NULL,
1269                                 dev->device->numa_node, 0);
1270         if (mp == NULL) {
1271                 DRV_LOG(ERR,
1272                         "port %u failed to allocate a mempool for"
1273                         " Multi-Packet RQ, count=%u, size=%u",
1274                         dev->data->port_id, obj_num, obj_size);
1275                 rte_errno = ENOMEM;
1276                 return -rte_errno;
1277         }
1278         priv->mprq_mp = mp;
1279 exit:
1280         /* Set mempool for each Rx queue. */
1281         for (i = 0; i != priv->rxqs_n; ++i) {
1282                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1283
1284                 if (rxq == NULL)
1285                         continue;
1286                 rxq->mprq_mp = mp;
1287         }
1288         DRV_LOG(INFO, "port %u Multi-Packet RQ is configured",
1289                 dev->data->port_id);
1290         return 0;
1291 }
1292
1293 /**
1294  * Create a DPDK Rx queue.
1295  *
1296  * @param dev
1297  *   Pointer to Ethernet device.
1298  * @param idx
1299  *   RX queue index.
1300  * @param desc
1301  *   Number of descriptors to configure in queue.
1302  * @param socket
1303  *   NUMA socket on which memory must be allocated.
1304  *
1305  * @return
1306  *   A DPDK queue object on success, NULL otherwise and rte_errno is set.
1307  */
1308 struct mlx5_rxq_ctrl *
1309 mlx5_rxq_new(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
1310              unsigned int socket, const struct rte_eth_rxconf *conf,
1311              struct rte_mempool *mp)
1312 {
1313         struct priv *priv = dev->data->dev_private;
1314         struct mlx5_rxq_ctrl *tmpl;
1315         unsigned int mb_len = rte_pktmbuf_data_room_size(mp);
1316         unsigned int mprq_stride_size;
1317         struct mlx5_dev_config *config = &priv->config;
1318         /*
1319          * Always allocate extra slots, even if eventually
1320          * the vector Rx will not be used.
1321          */
1322         uint16_t desc_n =
1323                 desc + config->rx_vec_en * MLX5_VPMD_DESCS_PER_LOOP;
1324         uint64_t offloads = conf->offloads |
1325                            dev->data->dev_conf.rxmode.offloads;
1326         const int mprq_en = mlx5_check_mprq_support(dev) > 0;
1327
1328         tmpl = rte_calloc_socket("RXQ", 1,
1329                                  sizeof(*tmpl) +
1330                                  desc_n * sizeof(struct rte_mbuf *),
1331                                  0, socket);
1332         if (!tmpl) {
1333                 rte_errno = ENOMEM;
1334                 return NULL;
1335         }
1336         if (mlx5_mr_btree_init(&tmpl->rxq.mr_ctrl.cache_bh,
1337                                MLX5_MR_BTREE_CACHE_N, socket)) {
1338                 /* rte_errno is already set. */
1339                 goto error;
1340         }
1341         tmpl->socket = socket;
1342         if (dev->data->dev_conf.intr_conf.rxq)
1343                 tmpl->irq = 1;
1344         /*
1345          * This Rx queue can be configured as a Multi-Packet RQ if all of the
1346          * following conditions are met:
1347          *  - MPRQ is enabled.
1348          *  - The number of descs is more than the number of strides.
1349          *  - max_rx_pkt_len plus overhead is less than the max size of a
1350          *    stride.
1351          *  Otherwise, enable Rx scatter if necessary.
1352          */
1353         assert(mb_len >= RTE_PKTMBUF_HEADROOM);
1354         mprq_stride_size =
1355                 dev->data->dev_conf.rxmode.max_rx_pkt_len +
1356                 sizeof(struct rte_mbuf_ext_shared_info) +
1357                 RTE_PKTMBUF_HEADROOM;
1358         if (mprq_en &&
1359             desc > (1U << config->mprq.stride_num_n) &&
1360             mprq_stride_size <= (1U << config->mprq.max_stride_size_n)) {
1361                 /* TODO: Rx scatter isn't supported yet. */
1362                 tmpl->rxq.sges_n = 0;
1363                 /* Trim the number of descs needed. */
1364                 desc >>= config->mprq.stride_num_n;
1365                 tmpl->rxq.strd_num_n = config->mprq.stride_num_n;
1366                 tmpl->rxq.strd_sz_n = RTE_MAX(log2above(mprq_stride_size),
1367                                               config->mprq.min_stride_size_n);
1368                 tmpl->rxq.strd_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT;
1369                 tmpl->rxq.mprq_max_memcpy_len =
1370                         RTE_MIN(mb_len - RTE_PKTMBUF_HEADROOM,
1371                                 config->mprq.max_memcpy_len);
1372                 DRV_LOG(DEBUG,
1373                         "port %u Rx queue %u: Multi-Packet RQ is enabled"
1374                         " strd_num_n = %u, strd_sz_n = %u",
1375                         dev->data->port_id, idx,
1376                         tmpl->rxq.strd_num_n, tmpl->rxq.strd_sz_n);
1377         } else if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
1378                    (mb_len - RTE_PKTMBUF_HEADROOM)) {
1379                 tmpl->rxq.sges_n = 0;
1380         } else if (offloads & DEV_RX_OFFLOAD_SCATTER) {
1381                 unsigned int size =
1382                         RTE_PKTMBUF_HEADROOM +
1383                         dev->data->dev_conf.rxmode.max_rx_pkt_len;
1384                 unsigned int sges_n;
1385
1386                 /*
1387                  * Determine the number of SGEs needed for a full packet
1388                  * and round it to the next power of two.
1389                  */
1390                 sges_n = log2above((size / mb_len) + !!(size % mb_len));
1391                 tmpl->rxq.sges_n = sges_n;
1392                 /* Make sure rxq.sges_n did not overflow. */
1393                 size = mb_len * (1 << tmpl->rxq.sges_n);
1394                 size -= RTE_PKTMBUF_HEADROOM;
1395                 if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
1396                         DRV_LOG(ERR,
1397                                 "port %u too many SGEs (%u) needed to handle"
1398                                 " requested maximum packet size %u",
1399                                 dev->data->port_id,
1400                                 1 << sges_n,
1401                                 dev->data->dev_conf.rxmode.max_rx_pkt_len);
1402                         rte_errno = EOVERFLOW;
1403                         goto error;
1404                 }
1405         } else {
1406                 DRV_LOG(WARNING,
1407                         "port %u the requested maximum Rx packet size (%u) is"
1408                         " larger than a single mbuf (%u) and scattered mode has"
1409                         " not been requested",
1410                         dev->data->port_id,
1411                         dev->data->dev_conf.rxmode.max_rx_pkt_len,
1412                         mb_len - RTE_PKTMBUF_HEADROOM);
1413         }
1414         if (mprq_en && !mlx5_rxq_mprq_enabled(&tmpl->rxq))
1415                 DRV_LOG(WARNING,
1416                         "port %u MPRQ is requested but cannot be enabled"
1417                         " (requested: desc = %u, stride_sz = %u,"
1418                         " supported: min_stride_num = %u, max_stride_sz = %u).",
1419                         dev->data->port_id, desc, mprq_stride_size,
1420                         (1 << config->mprq.stride_num_n),
1421                         (1 << config->mprq.max_stride_size_n));
1422         DRV_LOG(DEBUG, "port %u maximum number of segments per packet: %u",
1423                 dev->data->port_id, 1 << tmpl->rxq.sges_n);
1424         if (desc % (1 << tmpl->rxq.sges_n)) {
1425                 DRV_LOG(ERR,
1426                         "port %u number of Rx queue descriptors (%u) is not a"
1427                         " multiple of SGEs per packet (%u)",
1428                         dev->data->port_id,
1429                         desc,
1430                         1 << tmpl->rxq.sges_n);
1431                 rte_errno = EINVAL;
1432                 goto error;
1433         }
1434         /* Toggle RX checksum offload if hardware supports it. */
1435         tmpl->rxq.csum = !!(offloads & DEV_RX_OFFLOAD_CHECKSUM);
1436         tmpl->rxq.hw_timestamp = !!(offloads & DEV_RX_OFFLOAD_TIMESTAMP);
1437         /* Configure VLAN stripping. */
1438         tmpl->rxq.vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
1439         /* By default, FCS (CRC) is stripped by hardware. */
1440         tmpl->rxq.crc_present = 0;
1441         if (rte_eth_dev_must_keep_crc(offloads)) {
1442                 if (config->hw_fcs_strip) {
1443                         tmpl->rxq.crc_present = 1;
1444                 } else {
1445                         DRV_LOG(WARNING,
1446                                 "port %u CRC stripping has been disabled but will"
1447                                 " still be performed by hardware, make sure MLNX_OFED"
1448                                 " and firmware are up to date",
1449                                 dev->data->port_id);
1450                 }
1451         }
1452         DRV_LOG(DEBUG,
1453                 "port %u CRC stripping is %s, %u bytes will be subtracted from"
1454                 " incoming frames to hide it",
1455                 dev->data->port_id,
1456                 tmpl->rxq.crc_present ? "disabled" : "enabled",
1457                 tmpl->rxq.crc_present << 2);
1458         /* Save port ID. */
1459         tmpl->rxq.rss_hash = !!priv->rss_conf.rss_hf &&
1460                 (!!(dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS));
1461         tmpl->rxq.port_id = dev->data->port_id;
1462         tmpl->priv = priv;
1463         tmpl->rxq.mp = mp;
1464         tmpl->rxq.stats.idx = idx;
1465         tmpl->rxq.elts_n = log2above(desc);
1466         tmpl->rxq.elts =
1467                 (struct rte_mbuf *(*)[1 << tmpl->rxq.elts_n])(tmpl + 1);
1468 #ifndef RTE_ARCH_64
1469         tmpl->rxq.uar_lock_cq = &priv->uar_lock_cq;
1470 #endif
1471         tmpl->idx = idx;
1472         rte_atomic32_inc(&tmpl->refcnt);
1473         LIST_INSERT_HEAD(&priv->rxqsctrl, tmpl, next);
1474         return tmpl;
1475 error:
1476         rte_free(tmpl);
1477         return NULL;
1478 }
1479
1480 /**
1481  * Get a Rx queue.
1482  *
1483  * @param dev
1484  *   Pointer to Ethernet device.
1485  * @param idx
1486  *   TX queue index.
1487  *
1488  * @return
1489  *   A pointer to the queue if it exists, NULL otherwise.
1490  */
1491 struct mlx5_rxq_ctrl *
1492 mlx5_rxq_get(struct rte_eth_dev *dev, uint16_t idx)
1493 {
1494         struct priv *priv = dev->data->dev_private;
1495         struct mlx5_rxq_ctrl *rxq_ctrl = NULL;
1496
1497         if ((*priv->rxqs)[idx]) {
1498                 rxq_ctrl = container_of((*priv->rxqs)[idx],
1499                                         struct mlx5_rxq_ctrl,
1500                                         rxq);
1501                 mlx5_rxq_ibv_get(dev, idx);
1502                 rte_atomic32_inc(&rxq_ctrl->refcnt);
1503         }
1504         return rxq_ctrl;
1505 }
1506
1507 /**
1508  * Release a Rx queue.
1509  *
1510  * @param dev
1511  *   Pointer to Ethernet device.
1512  * @param idx
1513  *   TX queue index.
1514  *
1515  * @return
1516  *   1 while a reference on it exists, 0 when freed.
1517  */
1518 int
1519 mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
1520 {
1521         struct priv *priv = dev->data->dev_private;
1522         struct mlx5_rxq_ctrl *rxq_ctrl;
1523
1524         if (!(*priv->rxqs)[idx])
1525                 return 0;
1526         rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq);
1527         assert(rxq_ctrl->priv);
1528         if (rxq_ctrl->ibv && !mlx5_rxq_ibv_release(rxq_ctrl->ibv))
1529                 rxq_ctrl->ibv = NULL;
1530         if (rte_atomic32_dec_and_test(&rxq_ctrl->refcnt)) {
1531                 mlx5_mr_btree_free(&rxq_ctrl->rxq.mr_ctrl.cache_bh);
1532                 LIST_REMOVE(rxq_ctrl, next);
1533                 rte_free(rxq_ctrl);
1534                 (*priv->rxqs)[idx] = NULL;
1535                 return 0;
1536         }
1537         return 1;
1538 }
1539
1540 /**
1541  * Verify if the queue can be released.
1542  *
1543  * @param dev
1544  *   Pointer to Ethernet device.
1545  * @param idx
1546  *   TX queue index.
1547  *
1548  * @return
1549  *   1 if the queue can be released, negative errno otherwise and rte_errno is
1550  *   set.
1551  */
1552 int
1553 mlx5_rxq_releasable(struct rte_eth_dev *dev, uint16_t idx)
1554 {
1555         struct priv *priv = dev->data->dev_private;
1556         struct mlx5_rxq_ctrl *rxq_ctrl;
1557
1558         if (!(*priv->rxqs)[idx]) {
1559                 rte_errno = EINVAL;
1560                 return -rte_errno;
1561         }
1562         rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq);
1563         return (rte_atomic32_read(&rxq_ctrl->refcnt) == 1);
1564 }
1565
1566 /**
1567  * Verify the Rx Queue list is empty
1568  *
1569  * @param dev
1570  *   Pointer to Ethernet device.
1571  *
1572  * @return
1573  *   The number of object not released.
1574  */
1575 int
1576 mlx5_rxq_verify(struct rte_eth_dev *dev)
1577 {
1578         struct priv *priv = dev->data->dev_private;
1579         struct mlx5_rxq_ctrl *rxq_ctrl;
1580         int ret = 0;
1581
1582         LIST_FOREACH(rxq_ctrl, &priv->rxqsctrl, next) {
1583                 DRV_LOG(DEBUG, "port %u Rx Queue %u still referenced",
1584                         dev->data->port_id, rxq_ctrl->idx);
1585                 ++ret;
1586         }
1587         return ret;
1588 }
1589
1590 /**
1591  * Create an indirection table.
1592  *
1593  * @param dev
1594  *   Pointer to Ethernet device.
1595  * @param queues
1596  *   Queues entering in the indirection table.
1597  * @param queues_n
1598  *   Number of queues in the array.
1599  *
1600  * @return
1601  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1602  */
1603 struct mlx5_ind_table_ibv *
1604 mlx5_ind_table_ibv_new(struct rte_eth_dev *dev, const uint16_t *queues,
1605                        uint32_t queues_n)
1606 {
1607         struct priv *priv = dev->data->dev_private;
1608         struct mlx5_ind_table_ibv *ind_tbl;
1609         const unsigned int wq_n = rte_is_power_of_2(queues_n) ?
1610                 log2above(queues_n) :
1611                 log2above(priv->config.ind_table_max_size);
1612         struct ibv_wq *wq[1 << wq_n];
1613         unsigned int i;
1614         unsigned int j;
1615
1616         ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl) +
1617                              queues_n * sizeof(uint16_t), 0);
1618         if (!ind_tbl) {
1619                 rte_errno = ENOMEM;
1620                 return NULL;
1621         }
1622         for (i = 0; i != queues_n; ++i) {
1623                 struct mlx5_rxq_ctrl *rxq = mlx5_rxq_get(dev, queues[i]);
1624
1625                 if (!rxq)
1626                         goto error;
1627                 wq[i] = rxq->ibv->wq;
1628                 ind_tbl->queues[i] = queues[i];
1629         }
1630         ind_tbl->queues_n = queues_n;
1631         /* Finalise indirection table. */
1632         for (j = 0; i != (unsigned int)(1 << wq_n); ++i, ++j)
1633                 wq[i] = wq[j];
1634         ind_tbl->ind_table = mlx5_glue->create_rwq_ind_table
1635                 (priv->ctx,
1636                  &(struct ibv_rwq_ind_table_init_attr){
1637                         .log_ind_tbl_size = wq_n,
1638                         .ind_tbl = wq,
1639                         .comp_mask = 0,
1640                  });
1641         if (!ind_tbl->ind_table) {
1642                 rte_errno = errno;
1643                 goto error;
1644         }
1645         rte_atomic32_inc(&ind_tbl->refcnt);
1646         LIST_INSERT_HEAD(&priv->ind_tbls, ind_tbl, next);
1647         return ind_tbl;
1648 error:
1649         rte_free(ind_tbl);
1650         DEBUG("port %u cannot create indirection table", dev->data->port_id);
1651         return NULL;
1652 }
1653
1654 /**
1655  * Get an indirection table.
1656  *
1657  * @param dev
1658  *   Pointer to Ethernet device.
1659  * @param queues
1660  *   Queues entering in the indirection table.
1661  * @param queues_n
1662  *   Number of queues in the array.
1663  *
1664  * @return
1665  *   An indirection table if found.
1666  */
1667 struct mlx5_ind_table_ibv *
1668 mlx5_ind_table_ibv_get(struct rte_eth_dev *dev, const uint16_t *queues,
1669                        uint32_t queues_n)
1670 {
1671         struct priv *priv = dev->data->dev_private;
1672         struct mlx5_ind_table_ibv *ind_tbl;
1673
1674         LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) {
1675                 if ((ind_tbl->queues_n == queues_n) &&
1676                     (memcmp(ind_tbl->queues, queues,
1677                             ind_tbl->queues_n * sizeof(ind_tbl->queues[0]))
1678                      == 0))
1679                         break;
1680         }
1681         if (ind_tbl) {
1682                 unsigned int i;
1683
1684                 rte_atomic32_inc(&ind_tbl->refcnt);
1685                 for (i = 0; i != ind_tbl->queues_n; ++i)
1686                         mlx5_rxq_get(dev, ind_tbl->queues[i]);
1687         }
1688         return ind_tbl;
1689 }
1690
1691 /**
1692  * Release an indirection table.
1693  *
1694  * @param dev
1695  *   Pointer to Ethernet device.
1696  * @param ind_table
1697  *   Indirection table to release.
1698  *
1699  * @return
1700  *   1 while a reference on it exists, 0 when freed.
1701  */
1702 int
1703 mlx5_ind_table_ibv_release(struct rte_eth_dev *dev,
1704                            struct mlx5_ind_table_ibv *ind_tbl)
1705 {
1706         unsigned int i;
1707
1708         if (rte_atomic32_dec_and_test(&ind_tbl->refcnt))
1709                 claim_zero(mlx5_glue->destroy_rwq_ind_table
1710                            (ind_tbl->ind_table));
1711         for (i = 0; i != ind_tbl->queues_n; ++i)
1712                 claim_nonzero(mlx5_rxq_release(dev, ind_tbl->queues[i]));
1713         if (!rte_atomic32_read(&ind_tbl->refcnt)) {
1714                 LIST_REMOVE(ind_tbl, next);
1715                 rte_free(ind_tbl);
1716                 return 0;
1717         }
1718         return 1;
1719 }
1720
1721 /**
1722  * Verify the Rx Queue list is empty
1723  *
1724  * @param dev
1725  *   Pointer to Ethernet device.
1726  *
1727  * @return
1728  *   The number of object not released.
1729  */
1730 int
1731 mlx5_ind_table_ibv_verify(struct rte_eth_dev *dev)
1732 {
1733         struct priv *priv = dev->data->dev_private;
1734         struct mlx5_ind_table_ibv *ind_tbl;
1735         int ret = 0;
1736
1737         LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) {
1738                 DRV_LOG(DEBUG,
1739                         "port %u Verbs indirection table %p still referenced",
1740                         dev->data->port_id, (void *)ind_tbl);
1741                 ++ret;
1742         }
1743         return ret;
1744 }
1745
1746 /**
1747  * Create an Rx Hash queue.
1748  *
1749  * @param dev
1750  *   Pointer to Ethernet device.
1751  * @param rss_key
1752  *   RSS key for the Rx hash queue.
1753  * @param rss_key_len
1754  *   RSS key length.
1755  * @param hash_fields
1756  *   Verbs protocol hash field to make the RSS on.
1757  * @param queues
1758  *   Queues entering in hash queue. In case of empty hash_fields only the
1759  *   first queue index will be taken for the indirection table.
1760  * @param queues_n
1761  *   Number of queues.
1762  *
1763  * @return
1764  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1765  */
1766 struct mlx5_hrxq *
1767 mlx5_hrxq_new(struct rte_eth_dev *dev,
1768               const uint8_t *rss_key, uint32_t rss_key_len,
1769               uint64_t hash_fields,
1770               const uint16_t *queues, uint32_t queues_n,
1771               int tunnel __rte_unused)
1772 {
1773         struct priv *priv = dev->data->dev_private;
1774         struct mlx5_hrxq *hrxq;
1775         struct mlx5_ind_table_ibv *ind_tbl;
1776         struct ibv_qp *qp;
1777         int err;
1778
1779         queues_n = hash_fields ? queues_n : 1;
1780         ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n);
1781         if (!ind_tbl)
1782                 ind_tbl = mlx5_ind_table_ibv_new(dev, queues, queues_n);
1783         if (!ind_tbl) {
1784                 rte_errno = ENOMEM;
1785                 return NULL;
1786         }
1787         if (!rss_key_len) {
1788                 rss_key_len = MLX5_RSS_HASH_KEY_LEN;
1789                 rss_key = rss_hash_default_key;
1790         }
1791 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1792         qp = mlx5_glue->dv_create_qp
1793                 (priv->ctx,
1794                  &(struct ibv_qp_init_attr_ex){
1795                         .qp_type = IBV_QPT_RAW_PACKET,
1796                         .comp_mask =
1797                                 IBV_QP_INIT_ATTR_PD |
1798                                 IBV_QP_INIT_ATTR_IND_TABLE |
1799                                 IBV_QP_INIT_ATTR_RX_HASH,
1800                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1801                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
1802                                 .rx_hash_key_len = rss_key_len ? rss_key_len :
1803                                                    MLX5_RSS_HASH_KEY_LEN,
1804                                 .rx_hash_key = rss_key ?
1805                                                (void *)(uintptr_t)rss_key :
1806                                                rss_hash_default_key,
1807                                 .rx_hash_fields_mask = hash_fields,
1808                         },
1809                         .rwq_ind_tbl = ind_tbl->ind_table,
1810                         .pd = priv->pd,
1811                  },
1812                  &(struct mlx5dv_qp_init_attr){
1813                         .comp_mask = tunnel ?
1814                                 MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS : 0,
1815                         .create_flags = MLX5DV_QP_CREATE_TUNNEL_OFFLOADS,
1816                  });
1817 #else
1818         qp = mlx5_glue->create_qp_ex
1819                 (priv->ctx,
1820                  &(struct ibv_qp_init_attr_ex){
1821                         .qp_type = IBV_QPT_RAW_PACKET,
1822                         .comp_mask =
1823                                 IBV_QP_INIT_ATTR_PD |
1824                                 IBV_QP_INIT_ATTR_IND_TABLE |
1825                                 IBV_QP_INIT_ATTR_RX_HASH,
1826                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1827                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
1828                                 .rx_hash_key_len = rss_key_len ? rss_key_len :
1829                                                    MLX5_RSS_HASH_KEY_LEN,
1830                                 .rx_hash_key = rss_key ?
1831                                                (void *)(uintptr_t)rss_key :
1832                                                rss_hash_default_key,
1833                                 .rx_hash_fields_mask = hash_fields,
1834                         },
1835                         .rwq_ind_tbl = ind_tbl->ind_table,
1836                         .pd = priv->pd,
1837                  });
1838 #endif
1839         if (!qp) {
1840                 rte_errno = errno;
1841                 goto error;
1842         }
1843         hrxq = rte_calloc(__func__, 1, sizeof(*hrxq) + rss_key_len, 0);
1844         if (!hrxq)
1845                 goto error;
1846         hrxq->ind_table = ind_tbl;
1847         hrxq->qp = qp;
1848         hrxq->rss_key_len = rss_key_len;
1849         hrxq->hash_fields = hash_fields;
1850         memcpy(hrxq->rss_key, rss_key, rss_key_len);
1851         rte_atomic32_inc(&hrxq->refcnt);
1852         LIST_INSERT_HEAD(&priv->hrxqs, hrxq, next);
1853         return hrxq;
1854 error:
1855         err = rte_errno; /* Save rte_errno before cleanup. */
1856         mlx5_ind_table_ibv_release(dev, ind_tbl);
1857         if (qp)
1858                 claim_zero(mlx5_glue->destroy_qp(qp));
1859         rte_errno = err; /* Restore rte_errno. */
1860         return NULL;
1861 }
1862
1863 /**
1864  * Get an Rx Hash queue.
1865  *
1866  * @param dev
1867  *   Pointer to Ethernet device.
1868  * @param rss_conf
1869  *   RSS configuration for the Rx hash queue.
1870  * @param queues
1871  *   Queues entering in hash queue. In case of empty hash_fields only the
1872  *   first queue index will be taken for the indirection table.
1873  * @param queues_n
1874  *   Number of queues.
1875  *
1876  * @return
1877  *   An hash Rx queue on success.
1878  */
1879 struct mlx5_hrxq *
1880 mlx5_hrxq_get(struct rte_eth_dev *dev,
1881               const uint8_t *rss_key, uint32_t rss_key_len,
1882               uint64_t hash_fields,
1883               const uint16_t *queues, uint32_t queues_n)
1884 {
1885         struct priv *priv = dev->data->dev_private;
1886         struct mlx5_hrxq *hrxq;
1887
1888         queues_n = hash_fields ? queues_n : 1;
1889         LIST_FOREACH(hrxq, &priv->hrxqs, next) {
1890                 struct mlx5_ind_table_ibv *ind_tbl;
1891
1892                 if (hrxq->rss_key_len != rss_key_len)
1893                         continue;
1894                 if (memcmp(hrxq->rss_key, rss_key, rss_key_len))
1895                         continue;
1896                 if (hrxq->hash_fields != hash_fields)
1897                         continue;
1898                 ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n);
1899                 if (!ind_tbl)
1900                         continue;
1901                 if (ind_tbl != hrxq->ind_table) {
1902                         mlx5_ind_table_ibv_release(dev, ind_tbl);
1903                         continue;
1904                 }
1905                 rte_atomic32_inc(&hrxq->refcnt);
1906                 return hrxq;
1907         }
1908         return NULL;
1909 }
1910
1911 /**
1912  * Release the hash Rx queue.
1913  *
1914  * @param dev
1915  *   Pointer to Ethernet device.
1916  * @param hrxq
1917  *   Pointer to Hash Rx queue to release.
1918  *
1919  * @return
1920  *   1 while a reference on it exists, 0 when freed.
1921  */
1922 int
1923 mlx5_hrxq_release(struct rte_eth_dev *dev, struct mlx5_hrxq *hrxq)
1924 {
1925         if (rte_atomic32_dec_and_test(&hrxq->refcnt)) {
1926                 claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
1927                 mlx5_ind_table_ibv_release(dev, hrxq->ind_table);
1928                 LIST_REMOVE(hrxq, next);
1929                 rte_free(hrxq);
1930                 return 0;
1931         }
1932         claim_nonzero(mlx5_ind_table_ibv_release(dev, hrxq->ind_table));
1933         return 1;
1934 }
1935
1936 /**
1937  * Verify the Rx Queue list is empty
1938  *
1939  * @param dev
1940  *   Pointer to Ethernet device.
1941  *
1942  * @return
1943  *   The number of object not released.
1944  */
1945 int
1946 mlx5_hrxq_ibv_verify(struct rte_eth_dev *dev)
1947 {
1948         struct priv *priv = dev->data->dev_private;
1949         struct mlx5_hrxq *hrxq;
1950         int ret = 0;
1951
1952         LIST_FOREACH(hrxq, &priv->hrxqs, next) {
1953                 DRV_LOG(DEBUG,
1954                         "port %u Verbs hash Rx queue %p still referenced",
1955                         dev->data->port_id, (void *)hrxq);
1956                 ++ret;
1957         }
1958         return ret;
1959 }
1960
1961 /**
1962  * Create a drop Rx queue Verbs object.
1963  *
1964  * @param dev
1965  *   Pointer to Ethernet device.
1966  *
1967  * @return
1968  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1969  */
1970 struct mlx5_rxq_ibv *
1971 mlx5_rxq_ibv_drop_new(struct rte_eth_dev *dev)
1972 {
1973         struct priv *priv = dev->data->dev_private;
1974         struct ibv_cq *cq;
1975         struct ibv_wq *wq = NULL;
1976         struct mlx5_rxq_ibv *rxq;
1977
1978         if (priv->drop_queue.rxq)
1979                 return priv->drop_queue.rxq;
1980         cq = mlx5_glue->create_cq(priv->ctx, 1, NULL, NULL, 0);
1981         if (!cq) {
1982                 DEBUG("port %u cannot allocate CQ for drop queue",
1983                       dev->data->port_id);
1984                 rte_errno = errno;
1985                 goto error;
1986         }
1987         wq = mlx5_glue->create_wq(priv->ctx,
1988                  &(struct ibv_wq_init_attr){
1989                         .wq_type = IBV_WQT_RQ,
1990                         .max_wr = 1,
1991                         .max_sge = 1,
1992                         .pd = priv->pd,
1993                         .cq = cq,
1994                  });
1995         if (!wq) {
1996                 DEBUG("port %u cannot allocate WQ for drop queue",
1997                       dev->data->port_id);
1998                 rte_errno = errno;
1999                 goto error;
2000         }
2001         rxq = rte_calloc(__func__, 1, sizeof(*rxq), 0);
2002         if (!rxq) {
2003                 DEBUG("port %u cannot allocate drop Rx queue memory",
2004                       dev->data->port_id);
2005                 rte_errno = ENOMEM;
2006                 goto error;
2007         }
2008         rxq->cq = cq;
2009         rxq->wq = wq;
2010         priv->drop_queue.rxq = rxq;
2011         return rxq;
2012 error:
2013         if (wq)
2014                 claim_zero(mlx5_glue->destroy_wq(wq));
2015         if (cq)
2016                 claim_zero(mlx5_glue->destroy_cq(cq));
2017         return NULL;
2018 }
2019
2020 /**
2021  * Release a drop Rx queue Verbs object.
2022  *
2023  * @param dev
2024  *   Pointer to Ethernet device.
2025  *
2026  * @return
2027  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2028  */
2029 void
2030 mlx5_rxq_ibv_drop_release(struct rte_eth_dev *dev)
2031 {
2032         struct priv *priv = dev->data->dev_private;
2033         struct mlx5_rxq_ibv *rxq = priv->drop_queue.rxq;
2034
2035         if (rxq->wq)
2036                 claim_zero(mlx5_glue->destroy_wq(rxq->wq));
2037         if (rxq->cq)
2038                 claim_zero(mlx5_glue->destroy_cq(rxq->cq));
2039         rte_free(rxq);
2040         priv->drop_queue.rxq = NULL;
2041 }
2042
2043 /**
2044  * Create a drop indirection table.
2045  *
2046  * @param dev
2047  *   Pointer to Ethernet device.
2048  *
2049  * @return
2050  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2051  */
2052 struct mlx5_ind_table_ibv *
2053 mlx5_ind_table_ibv_drop_new(struct rte_eth_dev *dev)
2054 {
2055         struct priv *priv = dev->data->dev_private;
2056         struct mlx5_ind_table_ibv *ind_tbl;
2057         struct mlx5_rxq_ibv *rxq;
2058         struct mlx5_ind_table_ibv tmpl;
2059
2060         rxq = mlx5_rxq_ibv_drop_new(dev);
2061         if (!rxq)
2062                 return NULL;
2063         tmpl.ind_table = mlx5_glue->create_rwq_ind_table
2064                 (priv->ctx,
2065                  &(struct ibv_rwq_ind_table_init_attr){
2066                         .log_ind_tbl_size = 0,
2067                         .ind_tbl = &rxq->wq,
2068                         .comp_mask = 0,
2069                  });
2070         if (!tmpl.ind_table) {
2071                 DEBUG("port %u cannot allocate indirection table for drop"
2072                       " queue",
2073                       dev->data->port_id);
2074                 rte_errno = errno;
2075                 goto error;
2076         }
2077         ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl), 0);
2078         if (!ind_tbl) {
2079                 rte_errno = ENOMEM;
2080                 goto error;
2081         }
2082         ind_tbl->ind_table = tmpl.ind_table;
2083         return ind_tbl;
2084 error:
2085         mlx5_rxq_ibv_drop_release(dev);
2086         return NULL;
2087 }
2088
2089 /**
2090  * Release a drop indirection table.
2091  *
2092  * @param dev
2093  *   Pointer to Ethernet device.
2094  */
2095 void
2096 mlx5_ind_table_ibv_drop_release(struct rte_eth_dev *dev)
2097 {
2098         struct priv *priv = dev->data->dev_private;
2099         struct mlx5_ind_table_ibv *ind_tbl = priv->drop_queue.hrxq->ind_table;
2100
2101         claim_zero(mlx5_glue->destroy_rwq_ind_table(ind_tbl->ind_table));
2102         mlx5_rxq_ibv_drop_release(dev);
2103         rte_free(ind_tbl);
2104         priv->drop_queue.hrxq->ind_table = NULL;
2105 }
2106
2107 /**
2108  * Create a drop Rx Hash queue.
2109  *
2110  * @param dev
2111  *   Pointer to Ethernet device.
2112  *
2113  * @return
2114  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2115  */
2116 struct mlx5_hrxq *
2117 mlx5_hrxq_drop_new(struct rte_eth_dev *dev)
2118 {
2119         struct priv *priv = dev->data->dev_private;
2120         struct mlx5_ind_table_ibv *ind_tbl;
2121         struct ibv_qp *qp;
2122         struct mlx5_hrxq *hrxq;
2123
2124         if (priv->drop_queue.hrxq) {
2125                 rte_atomic32_inc(&priv->drop_queue.hrxq->refcnt);
2126                 return priv->drop_queue.hrxq;
2127         }
2128         ind_tbl = mlx5_ind_table_ibv_drop_new(dev);
2129         if (!ind_tbl)
2130                 return NULL;
2131         qp = mlx5_glue->create_qp_ex(priv->ctx,
2132                  &(struct ibv_qp_init_attr_ex){
2133                         .qp_type = IBV_QPT_RAW_PACKET,
2134                         .comp_mask =
2135                                 IBV_QP_INIT_ATTR_PD |
2136                                 IBV_QP_INIT_ATTR_IND_TABLE |
2137                                 IBV_QP_INIT_ATTR_RX_HASH,
2138                         .rx_hash_conf = (struct ibv_rx_hash_conf){
2139                                 .rx_hash_function =
2140                                         IBV_RX_HASH_FUNC_TOEPLITZ,
2141                                 .rx_hash_key_len = MLX5_RSS_HASH_KEY_LEN,
2142                                 .rx_hash_key = rss_hash_default_key,
2143                                 .rx_hash_fields_mask = 0,
2144                                 },
2145                         .rwq_ind_tbl = ind_tbl->ind_table,
2146                         .pd = priv->pd
2147                  });
2148         if (!qp) {
2149                 DEBUG("port %u cannot allocate QP for drop queue",
2150                       dev->data->port_id);
2151                 rte_errno = errno;
2152                 goto error;
2153         }
2154         hrxq = rte_calloc(__func__, 1, sizeof(*hrxq), 0);
2155         if (!hrxq) {
2156                 DRV_LOG(WARNING,
2157                         "port %u cannot allocate memory for drop queue",
2158                         dev->data->port_id);
2159                 rte_errno = ENOMEM;
2160                 goto error;
2161         }
2162         hrxq->ind_table = ind_tbl;
2163         hrxq->qp = qp;
2164         priv->drop_queue.hrxq = hrxq;
2165         rte_atomic32_set(&hrxq->refcnt, 1);
2166         return hrxq;
2167 error:
2168         if (ind_tbl)
2169                 mlx5_ind_table_ibv_drop_release(dev);
2170         return NULL;
2171 }
2172
2173 /**
2174  * Release a drop hash Rx queue.
2175  *
2176  * @param dev
2177  *   Pointer to Ethernet device.
2178  */
2179 void
2180 mlx5_hrxq_drop_release(struct rte_eth_dev *dev)
2181 {
2182         struct priv *priv = dev->data->dev_private;
2183         struct mlx5_hrxq *hrxq = priv->drop_queue.hrxq;
2184
2185         if (rte_atomic32_dec_and_test(&hrxq->refcnt)) {
2186                 claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
2187                 mlx5_ind_table_ibv_drop_release(dev);
2188                 rte_free(hrxq);
2189                 priv->drop_queue.hrxq = NULL;
2190         }
2191 }