net/mlx5: add VLAN push/pop DR commands to glue
[dpdk.git] / drivers / net / mlx4 / mlx4.c
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright 2012 6WIND S.A.
3  * Copyright 2012 Mellanox Technologies, Ltd
4  */
5
6 /**
7  * @file
8  * mlx4 driver initialization.
9  */
10
11 #include <assert.h>
12 #include <dlfcn.h>
13 #include <errno.h>
14 #include <inttypes.h>
15 #include <stddef.h>
16 #include <stdint.h>
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <string.h>
20 #include <sys/mman.h>
21 #include <unistd.h>
22
23 /* Verbs headers do not support -pedantic. */
24 #ifdef PEDANTIC
25 #pragma GCC diagnostic ignored "-Wpedantic"
26 #endif
27 #include <infiniband/verbs.h>
28 #ifdef PEDANTIC
29 #pragma GCC diagnostic error "-Wpedantic"
30 #endif
31
32 #include <rte_common.h>
33 #include <rte_config.h>
34 #include <rte_dev.h>
35 #include <rte_errno.h>
36 #include <rte_ethdev_driver.h>
37 #include <rte_ethdev_pci.h>
38 #include <rte_ether.h>
39 #include <rte_flow.h>
40 #include <rte_interrupts.h>
41 #include <rte_kvargs.h>
42 #include <rte_malloc.h>
43 #include <rte_mbuf.h>
44
45 #include "mlx4.h"
46 #include "mlx4_glue.h"
47 #include "mlx4_flow.h"
48 #include "mlx4_mr.h"
49 #include "mlx4_rxtx.h"
50 #include "mlx4_utils.h"
51
52 static const char *MZ_MLX4_PMD_SHARED_DATA = "mlx4_pmd_shared_data";
53
54 /* Shared memory between primary and secondary processes. */
55 struct mlx4_shared_data *mlx4_shared_data;
56
57 /* Spinlock for mlx4_shared_data allocation. */
58 static rte_spinlock_t mlx4_shared_data_lock = RTE_SPINLOCK_INITIALIZER;
59
60 /* Process local data for secondary processes. */
61 static struct mlx4_local_data mlx4_local_data;
62
63 /** Driver-specific log messages type. */
64 int mlx4_logtype;
65
66 /** Configuration structure for device arguments. */
67 struct mlx4_conf {
68         struct {
69                 uint32_t present; /**< Bit-field for existing ports. */
70                 uint32_t enabled; /**< Bit-field for user-enabled ports. */
71         } ports;
72         int mr_ext_memseg_en;
73         /** Whether memseg should be extended for MR creation. */
74 };
75
76 /* Available parameters list. */
77 const char *pmd_mlx4_init_params[] = {
78         MLX4_PMD_PORT_KVARG,
79         MLX4_MR_EXT_MEMSEG_EN_KVARG,
80         NULL,
81 };
82
83 static void mlx4_dev_stop(struct rte_eth_dev *dev);
84
85 /**
86  * Initialize shared data between primary and secondary process.
87  *
88  * A memzone is reserved by primary process and secondary processes attach to
89  * the memzone.
90  *
91  * @return
92  *   0 on success, a negative errno value otherwise and rte_errno is set.
93  */
94 static int
95 mlx4_init_shared_data(void)
96 {
97         const struct rte_memzone *mz;
98         int ret = 0;
99
100         rte_spinlock_lock(&mlx4_shared_data_lock);
101         if (mlx4_shared_data == NULL) {
102                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
103                         /* Allocate shared memory. */
104                         mz = rte_memzone_reserve(MZ_MLX4_PMD_SHARED_DATA,
105                                                  sizeof(*mlx4_shared_data),
106                                                  SOCKET_ID_ANY, 0);
107                         if (mz == NULL) {
108                                 ERROR("Cannot allocate mlx4 shared data\n");
109                                 ret = -rte_errno;
110                                 goto error;
111                         }
112                         mlx4_shared_data = mz->addr;
113                         memset(mlx4_shared_data, 0, sizeof(*mlx4_shared_data));
114                         rte_spinlock_init(&mlx4_shared_data->lock);
115                 } else {
116                         /* Lookup allocated shared memory. */
117                         mz = rte_memzone_lookup(MZ_MLX4_PMD_SHARED_DATA);
118                         if (mz == NULL) {
119                                 ERROR("Cannot attach mlx4 shared data\n");
120                                 ret = -rte_errno;
121                                 goto error;
122                         }
123                         mlx4_shared_data = mz->addr;
124                         memset(&mlx4_local_data, 0, sizeof(mlx4_local_data));
125                 }
126         }
127 error:
128         rte_spinlock_unlock(&mlx4_shared_data_lock);
129         return ret;
130 }
131
132 #ifdef HAVE_IBV_MLX4_BUF_ALLOCATORS
133 /**
134  * Verbs callback to allocate a memory. This function should allocate the space
135  * according to the size provided residing inside a huge page.
136  * Please note that all allocation must respect the alignment from libmlx4
137  * (i.e. currently sysconf(_SC_PAGESIZE)).
138  *
139  * @param[in] size
140  *   The size in bytes of the memory to allocate.
141  * @param[in] data
142  *   A pointer to the callback data.
143  *
144  * @return
145  *   Allocated buffer, NULL otherwise and rte_errno is set.
146  */
147 static void *
148 mlx4_alloc_verbs_buf(size_t size, void *data)
149 {
150         struct mlx4_priv *priv = data;
151         void *ret;
152         size_t alignment = sysconf(_SC_PAGESIZE);
153         unsigned int socket = SOCKET_ID_ANY;
154
155         if (priv->verbs_alloc_ctx.type == MLX4_VERBS_ALLOC_TYPE_TX_QUEUE) {
156                 const struct txq *txq = priv->verbs_alloc_ctx.obj;
157
158                 socket = txq->socket;
159         } else if (priv->verbs_alloc_ctx.type ==
160                    MLX4_VERBS_ALLOC_TYPE_RX_QUEUE) {
161                 const struct rxq *rxq = priv->verbs_alloc_ctx.obj;
162
163                 socket = rxq->socket;
164         }
165         assert(data != NULL);
166         ret = rte_malloc_socket(__func__, size, alignment, socket);
167         if (!ret && size)
168                 rte_errno = ENOMEM;
169         return ret;
170 }
171
172 /**
173  * Verbs callback to free a memory.
174  *
175  * @param[in] ptr
176  *   A pointer to the memory to free.
177  * @param[in] data
178  *   A pointer to the callback data.
179  */
180 static void
181 mlx4_free_verbs_buf(void *ptr, void *data __rte_unused)
182 {
183         assert(data != NULL);
184         rte_free(ptr);
185 }
186 #endif
187
188 /**
189  * Initialize process private data structure.
190  *
191  * @param dev
192  *   Pointer to Ethernet device structure.
193  *
194  * @return
195  *   0 on success, a negative errno value otherwise and rte_errno is set.
196  */
197 static int
198 mlx4_proc_priv_init(struct rte_eth_dev *dev)
199 {
200         struct mlx4_proc_priv *ppriv;
201         size_t ppriv_size;
202
203         /*
204          * UAR register table follows the process private structure. BlueFlame
205          * registers for Tx queues are stored in the table.
206          */
207         ppriv_size = sizeof(struct mlx4_proc_priv) +
208                      dev->data->nb_tx_queues * sizeof(void *);
209         ppriv = rte_malloc_socket("mlx4_proc_priv", ppriv_size,
210                                   RTE_CACHE_LINE_SIZE, dev->device->numa_node);
211         if (!ppriv) {
212                 rte_errno = ENOMEM;
213                 return -rte_errno;
214         }
215         ppriv->uar_table_sz = ppriv_size;
216         dev->process_private = ppriv;
217         return 0;
218 }
219
220 /**
221  * Un-initialize process private data structure.
222  *
223  * @param dev
224  *   Pointer to Ethernet device structure.
225  */
226 static void
227 mlx4_proc_priv_uninit(struct rte_eth_dev *dev)
228 {
229         if (!dev->process_private)
230                 return;
231         rte_free(dev->process_private);
232         dev->process_private = NULL;
233 }
234
235 /**
236  * DPDK callback for Ethernet device configuration.
237  *
238  * @param dev
239  *   Pointer to Ethernet device structure.
240  *
241  * @return
242  *   0 on success, negative errno value otherwise and rte_errno is set.
243  */
244 static int
245 mlx4_dev_configure(struct rte_eth_dev *dev)
246 {
247         struct mlx4_priv *priv = dev->data->dev_private;
248         struct rte_flow_error error;
249         int ret;
250
251         /* Prepare internal flow rules. */
252         ret = mlx4_flow_sync(priv, &error);
253         if (ret) {
254                 ERROR("cannot set up internal flow rules (code %d, \"%s\"),"
255                       " flow error type %d, cause %p, message: %s",
256                       -ret, strerror(-ret), error.type, error.cause,
257                       error.message ? error.message : "(unspecified)");
258                 goto exit;
259         }
260         ret = mlx4_intr_install(priv);
261         if (ret) {
262                 ERROR("%p: interrupt handler installation failed",
263                       (void *)dev);
264                 goto exit;
265         }
266         ret = mlx4_proc_priv_init(dev);
267         if (ret) {
268                 ERROR("%p: process private data allocation failed",
269                       (void *)dev);
270                 goto exit;
271         }
272 exit:
273         return ret;
274 }
275
276 /**
277  * DPDK callback to start the device.
278  *
279  * Simulate device start by initializing common RSS resources and attaching
280  * all configured flows.
281  *
282  * @param dev
283  *   Pointer to Ethernet device structure.
284  *
285  * @return
286  *   0 on success, negative errno value otherwise and rte_errno is set.
287  */
288 static int
289 mlx4_dev_start(struct rte_eth_dev *dev)
290 {
291         struct mlx4_priv *priv = dev->data->dev_private;
292         struct rte_flow_error error;
293         int ret;
294
295         if (priv->started)
296                 return 0;
297         DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
298         priv->started = 1;
299         ret = mlx4_rss_init(priv);
300         if (ret) {
301                 ERROR("%p: cannot initialize RSS resources: %s",
302                       (void *)dev, strerror(-ret));
303                 goto err;
304         }
305 #ifndef NDEBUG
306         mlx4_mr_dump_dev(dev);
307 #endif
308         ret = mlx4_rxq_intr_enable(priv);
309         if (ret) {
310                 ERROR("%p: interrupt handler installation failed",
311                      (void *)dev);
312                 goto err;
313         }
314         ret = mlx4_flow_sync(priv, &error);
315         if (ret) {
316                 ERROR("%p: cannot attach flow rules (code %d, \"%s\"),"
317                       " flow error type %d, cause %p, message: %s",
318                       (void *)dev,
319                       -ret, strerror(-ret), error.type, error.cause,
320                       error.message ? error.message : "(unspecified)");
321                 goto err;
322         }
323         rte_wmb();
324         dev->tx_pkt_burst = mlx4_tx_burst;
325         dev->rx_pkt_burst = mlx4_rx_burst;
326         /* Enable datapath on secondary process. */
327         mlx4_mp_req_start_rxtx(dev);
328         return 0;
329 err:
330         mlx4_dev_stop(dev);
331         return ret;
332 }
333
334 /**
335  * DPDK callback to stop the device.
336  *
337  * Simulate device stop by detaching all configured flows.
338  *
339  * @param dev
340  *   Pointer to Ethernet device structure.
341  */
342 static void
343 mlx4_dev_stop(struct rte_eth_dev *dev)
344 {
345         struct mlx4_priv *priv = dev->data->dev_private;
346
347         if (!priv->started)
348                 return;
349         DEBUG("%p: detaching flows from all RX queues", (void *)dev);
350         priv->started = 0;
351         dev->tx_pkt_burst = mlx4_tx_burst_removed;
352         dev->rx_pkt_burst = mlx4_rx_burst_removed;
353         rte_wmb();
354         /* Disable datapath on secondary process. */
355         mlx4_mp_req_stop_rxtx(dev);
356         mlx4_flow_sync(priv, NULL);
357         mlx4_rxq_intr_disable(priv);
358         mlx4_rss_deinit(priv);
359 }
360
361 /**
362  * DPDK callback to close the device.
363  *
364  * Destroy all queues and objects, free memory.
365  *
366  * @param dev
367  *   Pointer to Ethernet device structure.
368  */
369 static void
370 mlx4_dev_close(struct rte_eth_dev *dev)
371 {
372         struct mlx4_priv *priv = dev->data->dev_private;
373         unsigned int i;
374
375         DEBUG("%p: closing device \"%s\"",
376               (void *)dev,
377               ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
378         dev->rx_pkt_burst = mlx4_rx_burst_removed;
379         dev->tx_pkt_burst = mlx4_tx_burst_removed;
380         rte_wmb();
381         /* Disable datapath on secondary process. */
382         mlx4_mp_req_stop_rxtx(dev);
383         mlx4_flow_clean(priv);
384         mlx4_rss_deinit(priv);
385         for (i = 0; i != dev->data->nb_rx_queues; ++i)
386                 mlx4_rx_queue_release(dev->data->rx_queues[i]);
387         for (i = 0; i != dev->data->nb_tx_queues; ++i)
388                 mlx4_tx_queue_release(dev->data->tx_queues[i]);
389         mlx4_proc_priv_uninit(dev);
390         mlx4_mr_release(dev);
391         if (priv->pd != NULL) {
392                 assert(priv->ctx != NULL);
393                 claim_zero(mlx4_glue->dealloc_pd(priv->pd));
394                 claim_zero(mlx4_glue->close_device(priv->ctx));
395         } else
396                 assert(priv->ctx == NULL);
397         mlx4_intr_uninstall(priv);
398         memset(priv, 0, sizeof(*priv));
399 }
400
401 static const struct eth_dev_ops mlx4_dev_ops = {
402         .dev_configure = mlx4_dev_configure,
403         .dev_start = mlx4_dev_start,
404         .dev_stop = mlx4_dev_stop,
405         .dev_set_link_down = mlx4_dev_set_link_down,
406         .dev_set_link_up = mlx4_dev_set_link_up,
407         .dev_close = mlx4_dev_close,
408         .link_update = mlx4_link_update,
409         .promiscuous_enable = mlx4_promiscuous_enable,
410         .promiscuous_disable = mlx4_promiscuous_disable,
411         .allmulticast_enable = mlx4_allmulticast_enable,
412         .allmulticast_disable = mlx4_allmulticast_disable,
413         .mac_addr_remove = mlx4_mac_addr_remove,
414         .mac_addr_add = mlx4_mac_addr_add,
415         .mac_addr_set = mlx4_mac_addr_set,
416         .set_mc_addr_list = mlx4_set_mc_addr_list,
417         .stats_get = mlx4_stats_get,
418         .stats_reset = mlx4_stats_reset,
419         .fw_version_get = mlx4_fw_version_get,
420         .dev_infos_get = mlx4_dev_infos_get,
421         .dev_supported_ptypes_get = mlx4_dev_supported_ptypes_get,
422         .vlan_filter_set = mlx4_vlan_filter_set,
423         .rx_queue_setup = mlx4_rx_queue_setup,
424         .tx_queue_setup = mlx4_tx_queue_setup,
425         .rx_queue_release = mlx4_rx_queue_release,
426         .tx_queue_release = mlx4_tx_queue_release,
427         .flow_ctrl_get = mlx4_flow_ctrl_get,
428         .flow_ctrl_set = mlx4_flow_ctrl_set,
429         .mtu_set = mlx4_mtu_set,
430         .filter_ctrl = mlx4_filter_ctrl,
431         .rx_queue_intr_enable = mlx4_rx_intr_enable,
432         .rx_queue_intr_disable = mlx4_rx_intr_disable,
433         .is_removed = mlx4_is_removed,
434 };
435
436 /* Available operations from secondary process. */
437 static const struct eth_dev_ops mlx4_dev_sec_ops = {
438         .stats_get = mlx4_stats_get,
439         .stats_reset = mlx4_stats_reset,
440         .fw_version_get = mlx4_fw_version_get,
441         .dev_infos_get = mlx4_dev_infos_get,
442 };
443
444 /**
445  * Get PCI information from struct ibv_device.
446  *
447  * @param device
448  *   Pointer to Ethernet device structure.
449  * @param[out] pci_addr
450  *   PCI bus address output buffer.
451  *
452  * @return
453  *   0 on success, negative errno value otherwise and rte_errno is set.
454  */
455 static int
456 mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
457                             struct rte_pci_addr *pci_addr)
458 {
459         FILE *file;
460         char line[32];
461         MKSTR(path, "%s/device/uevent", device->ibdev_path);
462
463         file = fopen(path, "rb");
464         if (file == NULL) {
465                 rte_errno = errno;
466                 return -rte_errno;
467         }
468         while (fgets(line, sizeof(line), file) == line) {
469                 size_t len = strlen(line);
470                 int ret;
471
472                 /* Truncate long lines. */
473                 if (len == (sizeof(line) - 1))
474                         while (line[(len - 1)] != '\n') {
475                                 ret = fgetc(file);
476                                 if (ret == EOF)
477                                         break;
478                                 line[(len - 1)] = ret;
479                         }
480                 /* Extract information. */
481                 if (sscanf(line,
482                            "PCI_SLOT_NAME="
483                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
484                            &pci_addr->domain,
485                            &pci_addr->bus,
486                            &pci_addr->devid,
487                            &pci_addr->function) == 4) {
488                         ret = 0;
489                         break;
490                 }
491         }
492         fclose(file);
493         return 0;
494 }
495
496 /**
497  * Verify and store value for device argument.
498  *
499  * @param[in] key
500  *   Key argument to verify.
501  * @param[in] val
502  *   Value associated with key.
503  * @param[in, out] conf
504  *   Shared configuration data.
505  *
506  * @return
507  *   0 on success, negative errno value otherwise and rte_errno is set.
508  */
509 static int
510 mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf)
511 {
512         unsigned long tmp;
513
514         errno = 0;
515         tmp = strtoul(val, NULL, 0);
516         if (errno) {
517                 rte_errno = errno;
518                 WARN("%s: \"%s\" is not a valid integer", key, val);
519                 return -rte_errno;
520         }
521         if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
522                 uint32_t ports = rte_log2_u32(conf->ports.present + 1);
523
524                 if (tmp >= ports) {
525                         ERROR("port index %lu outside range [0,%" PRIu32 ")",
526                               tmp, ports);
527                         return -EINVAL;
528                 }
529                 if (!(conf->ports.present & (1 << tmp))) {
530                         rte_errno = EINVAL;
531                         ERROR("invalid port index %lu", tmp);
532                         return -rte_errno;
533                 }
534                 conf->ports.enabled |= 1 << tmp;
535         } else if (strcmp(MLX4_MR_EXT_MEMSEG_EN_KVARG, key) == 0) {
536                 conf->mr_ext_memseg_en = !!tmp;
537         } else {
538                 rte_errno = EINVAL;
539                 WARN("%s: unknown parameter", key);
540                 return -rte_errno;
541         }
542         return 0;
543 }
544
545 /**
546  * Parse device parameters.
547  *
548  * @param devargs
549  *   Device arguments structure.
550  *
551  * @return
552  *   0 on success, negative errno value otherwise and rte_errno is set.
553  */
554 static int
555 mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf)
556 {
557         struct rte_kvargs *kvlist;
558         unsigned int arg_count;
559         int ret = 0;
560         int i;
561
562         if (devargs == NULL)
563                 return 0;
564         kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params);
565         if (kvlist == NULL) {
566                 rte_errno = EINVAL;
567                 ERROR("failed to parse kvargs");
568                 return -rte_errno;
569         }
570         /* Process parameters. */
571         for (i = 0; pmd_mlx4_init_params[i]; ++i) {
572                 arg_count = rte_kvargs_count(kvlist, pmd_mlx4_init_params[i]);
573                 while (arg_count-- > 0) {
574                         ret = rte_kvargs_process(kvlist,
575                                                  pmd_mlx4_init_params[i],
576                                                  (int (*)(const char *,
577                                                           const char *,
578                                                           void *))
579                                                  mlx4_arg_parse,
580                                                  conf);
581                         if (ret != 0)
582                                 goto free_kvlist;
583                 }
584         }
585 free_kvlist:
586         rte_kvargs_free(kvlist);
587         return ret;
588 }
589
590 /**
591  * Interpret RSS capabilities reported by device.
592  *
593  * This function returns the set of usable Verbs RSS hash fields, kernel
594  * quirks taken into account.
595  *
596  * @param ctx
597  *   Verbs context.
598  * @param pd
599  *   Verbs protection domain.
600  * @param device_attr_ex
601  *   Extended device attributes to interpret.
602  *
603  * @return
604  *   Usable RSS hash fields mask in Verbs format.
605  */
606 static uint64_t
607 mlx4_hw_rss_sup(struct ibv_context *ctx, struct ibv_pd *pd,
608                 struct ibv_device_attr_ex *device_attr_ex)
609 {
610         uint64_t hw_rss_sup = device_attr_ex->rss_caps.rx_hash_fields_mask;
611         struct ibv_cq *cq = NULL;
612         struct ibv_wq *wq = NULL;
613         struct ibv_rwq_ind_table *ind = NULL;
614         struct ibv_qp *qp = NULL;
615
616         if (!hw_rss_sup) {
617                 WARN("no RSS capabilities reported; disabling support for UDP"
618                      " RSS and inner VXLAN RSS");
619                 return IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4 |
620                         IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6 |
621                         IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP;
622         }
623         if (!(hw_rss_sup & IBV_RX_HASH_INNER))
624                 return hw_rss_sup;
625         /*
626          * Although reported as supported, missing code in some Linux
627          * versions (v4.15, v4.16) prevents the creation of hash QPs with
628          * inner capability.
629          *
630          * There is no choice but to attempt to instantiate a temporary RSS
631          * context in order to confirm its support.
632          */
633         cq = mlx4_glue->create_cq(ctx, 1, NULL, NULL, 0);
634         wq = cq ? mlx4_glue->create_wq
635                 (ctx,
636                  &(struct ibv_wq_init_attr){
637                         .wq_type = IBV_WQT_RQ,
638                         .max_wr = 1,
639                         .max_sge = 1,
640                         .pd = pd,
641                         .cq = cq,
642                  }) : NULL;
643         ind = wq ? mlx4_glue->create_rwq_ind_table
644                 (ctx,
645                  &(struct ibv_rwq_ind_table_init_attr){
646                         .log_ind_tbl_size = 0,
647                         .ind_tbl = &wq,
648                         .comp_mask = 0,
649                  }) : NULL;
650         qp = ind ? mlx4_glue->create_qp_ex
651                 (ctx,
652                  &(struct ibv_qp_init_attr_ex){
653                         .comp_mask =
654                                 (IBV_QP_INIT_ATTR_PD |
655                                  IBV_QP_INIT_ATTR_RX_HASH |
656                                  IBV_QP_INIT_ATTR_IND_TABLE),
657                         .qp_type = IBV_QPT_RAW_PACKET,
658                         .pd = pd,
659                         .rwq_ind_tbl = ind,
660                         .rx_hash_conf = {
661                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
662                                 .rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE,
663                                 .rx_hash_key = mlx4_rss_hash_key_default,
664                                 .rx_hash_fields_mask = hw_rss_sup,
665                         },
666                  }) : NULL;
667         if (!qp) {
668                 WARN("disabling unusable inner RSS capability due to kernel"
669                      " quirk");
670                 hw_rss_sup &= ~IBV_RX_HASH_INNER;
671         } else {
672                 claim_zero(mlx4_glue->destroy_qp(qp));
673         }
674         if (ind)
675                 claim_zero(mlx4_glue->destroy_rwq_ind_table(ind));
676         if (wq)
677                 claim_zero(mlx4_glue->destroy_wq(wq));
678         if (cq)
679                 claim_zero(mlx4_glue->destroy_cq(cq));
680         return hw_rss_sup;
681 }
682
683 static struct rte_pci_driver mlx4_driver;
684
685 /**
686  * PMD global initialization.
687  *
688  * Independent from individual device, this function initializes global
689  * per-PMD data structures distinguishing primary and secondary processes.
690  * Hence, each initialization is called once per a process.
691  *
692  * @return
693  *   0 on success, a negative errno value otherwise and rte_errno is set.
694  */
695 static int
696 mlx4_init_once(void)
697 {
698         struct mlx4_shared_data *sd;
699         struct mlx4_local_data *ld = &mlx4_local_data;
700         int ret = 0;
701
702         if (mlx4_init_shared_data())
703                 return -rte_errno;
704         sd = mlx4_shared_data;
705         assert(sd);
706         rte_spinlock_lock(&sd->lock);
707         switch (rte_eal_process_type()) {
708         case RTE_PROC_PRIMARY:
709                 if (sd->init_done)
710                         break;
711                 LIST_INIT(&sd->mem_event_cb_list);
712                 rte_rwlock_init(&sd->mem_event_rwlock);
713                 rte_mem_event_callback_register("MLX4_MEM_EVENT_CB",
714                                                 mlx4_mr_mem_event_cb, NULL);
715                 ret = mlx4_mp_init_primary();
716                 if (ret)
717                         goto out;
718                 sd->init_done = 1;
719                 break;
720         case RTE_PROC_SECONDARY:
721                 if (ld->init_done)
722                         break;
723                 ret = mlx4_mp_init_secondary();
724                 if (ret)
725                         goto out;
726                 ++sd->secondary_cnt;
727                 ld->init_done = 1;
728                 break;
729         default:
730                 break;
731         }
732 out:
733         rte_spinlock_unlock(&sd->lock);
734         return ret;
735 }
736
737 /**
738  * DPDK callback to register a PCI device.
739  *
740  * This function creates an Ethernet device for each port of a given
741  * PCI device.
742  *
743  * @param[in] pci_drv
744  *   PCI driver structure (mlx4_driver).
745  * @param[in] pci_dev
746  *   PCI device information.
747  *
748  * @return
749  *   0 on success, negative errno value otherwise and rte_errno is set.
750  */
751 static int
752 mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
753 {
754         struct ibv_device **list;
755         struct ibv_device *ibv_dev;
756         int err = 0;
757         struct ibv_context *attr_ctx = NULL;
758         struct ibv_device_attr device_attr;
759         struct ibv_device_attr_ex device_attr_ex;
760         struct mlx4_conf conf = {
761                 .ports.present = 0,
762                 .mr_ext_memseg_en = 1,
763         };
764         unsigned int vf;
765         int i;
766         char ifname[IF_NAMESIZE];
767
768         (void)pci_drv;
769         err = mlx4_init_once();
770         if (err) {
771                 ERROR("unable to init PMD global data: %s",
772                       strerror(rte_errno));
773                 return -rte_errno;
774         }
775         assert(pci_drv == &mlx4_driver);
776         list = mlx4_glue->get_device_list(&i);
777         if (list == NULL) {
778                 rte_errno = errno;
779                 assert(rte_errno);
780                 if (rte_errno == ENOSYS)
781                         ERROR("cannot list devices, is ib_uverbs loaded?");
782                 return -rte_errno;
783         }
784         assert(i >= 0);
785         /*
786          * For each listed device, check related sysfs entry against
787          * the provided PCI ID.
788          */
789         while (i != 0) {
790                 struct rte_pci_addr pci_addr;
791
792                 --i;
793                 DEBUG("checking device \"%s\"", list[i]->name);
794                 if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
795                         continue;
796                 if ((pci_dev->addr.domain != pci_addr.domain) ||
797                     (pci_dev->addr.bus != pci_addr.bus) ||
798                     (pci_dev->addr.devid != pci_addr.devid) ||
799                     (pci_dev->addr.function != pci_addr.function))
800                         continue;
801                 vf = (pci_dev->id.device_id ==
802                       PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
803                 INFO("PCI information matches, using device \"%s\" (VF: %s)",
804                      list[i]->name, (vf ? "true" : "false"));
805                 attr_ctx = mlx4_glue->open_device(list[i]);
806                 err = errno;
807                 break;
808         }
809         if (attr_ctx == NULL) {
810                 mlx4_glue->free_device_list(list);
811                 switch (err) {
812                 case 0:
813                         rte_errno = ENODEV;
814                         ERROR("cannot access device, is mlx4_ib loaded?");
815                         return -rte_errno;
816                 case EINVAL:
817                         rte_errno = EINVAL;
818                         ERROR("cannot use device, are drivers up to date?");
819                         return -rte_errno;
820                 }
821                 assert(err > 0);
822                 rte_errno = err;
823                 return -rte_errno;
824         }
825         ibv_dev = list[i];
826         DEBUG("device opened");
827         if (mlx4_glue->query_device(attr_ctx, &device_attr)) {
828                 err = ENODEV;
829                 goto error;
830         }
831         INFO("%u port(s) detected", device_attr.phys_port_cnt);
832         conf.ports.present |= (UINT64_C(1) << device_attr.phys_port_cnt) - 1;
833         if (mlx4_args(pci_dev->device.devargs, &conf)) {
834                 ERROR("failed to process device arguments");
835                 err = EINVAL;
836                 goto error;
837         }
838         /* Use all ports when none are defined */
839         if (!conf.ports.enabled)
840                 conf.ports.enabled = conf.ports.present;
841         /* Retrieve extended device attributes. */
842         if (mlx4_glue->query_device_ex(attr_ctx, NULL, &device_attr_ex)) {
843                 err = ENODEV;
844                 goto error;
845         }
846         assert(device_attr.max_sge >= MLX4_MAX_SGE);
847         for (i = 0; i < device_attr.phys_port_cnt; i++) {
848                 uint32_t port = i + 1; /* ports are indexed from one */
849                 struct ibv_context *ctx = NULL;
850                 struct ibv_port_attr port_attr;
851                 struct ibv_pd *pd = NULL;
852                 struct mlx4_priv *priv = NULL;
853                 struct rte_eth_dev *eth_dev = NULL;
854                 struct rte_ether_addr mac;
855                 char name[RTE_ETH_NAME_MAX_LEN];
856
857                 /* If port is not enabled, skip. */
858                 if (!(conf.ports.enabled & (1 << i)))
859                         continue;
860                 DEBUG("using port %u", port);
861                 ctx = mlx4_glue->open_device(ibv_dev);
862                 if (ctx == NULL) {
863                         err = ENODEV;
864                         goto port_error;
865                 }
866                 snprintf(name, sizeof(name), "%s port %u",
867                          mlx4_glue->get_device_name(ibv_dev), port);
868                 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
869                         eth_dev = rte_eth_dev_attach_secondary(name);
870                         if (eth_dev == NULL) {
871                                 ERROR("can not attach rte ethdev");
872                                 rte_errno = ENOMEM;
873                                 err = rte_errno;
874                                 goto error;
875                         }
876                         priv = eth_dev->data->dev_private;
877                         if (!priv->verbs_alloc_ctx.enabled) {
878                                 ERROR("secondary process is not supported"
879                                       " due to lack of external allocator"
880                                       " from Verbs");
881                                 rte_errno = ENOTSUP;
882                                 err = rte_errno;
883                                 goto error;
884                         }
885                         eth_dev->device = &pci_dev->device;
886                         eth_dev->dev_ops = &mlx4_dev_sec_ops;
887                         err = mlx4_proc_priv_init(eth_dev);
888                         if (err)
889                                 goto error;
890                         /* Receive command fd from primary process. */
891                         err = mlx4_mp_req_verbs_cmd_fd(eth_dev);
892                         if (err < 0) {
893                                 err = rte_errno;
894                                 goto error;
895                         }
896                         /* Remap UAR for Tx queues. */
897                         err = mlx4_tx_uar_init_secondary(eth_dev, err);
898                         if (err) {
899                                 err = rte_errno;
900                                 goto error;
901                         }
902                         /*
903                          * Ethdev pointer is still required as input since
904                          * the primary device is not accessible from the
905                          * secondary process.
906                          */
907                         eth_dev->tx_pkt_burst = mlx4_tx_burst;
908                         eth_dev->rx_pkt_burst = mlx4_rx_burst;
909                         claim_zero(mlx4_glue->close_device(ctx));
910                         rte_eth_copy_pci_info(eth_dev, pci_dev);
911                         rte_eth_dev_probing_finish(eth_dev);
912                         continue;
913                 }
914                 /* Check port status. */
915                 err = mlx4_glue->query_port(ctx, port, &port_attr);
916                 if (err) {
917                         err = ENODEV;
918                         ERROR("port query failed: %s", strerror(err));
919                         goto port_error;
920                 }
921                 if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
922                         err = ENOTSUP;
923                         ERROR("port %d is not configured in Ethernet mode",
924                               port);
925                         goto port_error;
926                 }
927                 if (port_attr.state != IBV_PORT_ACTIVE)
928                         DEBUG("port %d is not active: \"%s\" (%d)",
929                               port, mlx4_glue->port_state_str(port_attr.state),
930                               port_attr.state);
931                 /* Make asynchronous FD non-blocking to handle interrupts. */
932                 err = mlx4_fd_set_non_blocking(ctx->async_fd);
933                 if (err) {
934                         ERROR("cannot make asynchronous FD non-blocking: %s",
935                               strerror(err));
936                         goto port_error;
937                 }
938                 /* Allocate protection domain. */
939                 pd = mlx4_glue->alloc_pd(ctx);
940                 if (pd == NULL) {
941                         err = ENOMEM;
942                         ERROR("PD allocation failure");
943                         goto port_error;
944                 }
945                 /* from rte_ethdev.c */
946                 priv = rte_zmalloc("ethdev private structure",
947                                    sizeof(*priv),
948                                    RTE_CACHE_LINE_SIZE);
949                 if (priv == NULL) {
950                         err = ENOMEM;
951                         ERROR("priv allocation failure");
952                         goto port_error;
953                 }
954                 priv->ctx = ctx;
955                 priv->device_attr = device_attr;
956                 priv->port = port;
957                 priv->pd = pd;
958                 priv->mtu = RTE_ETHER_MTU;
959                 priv->vf = vf;
960                 priv->hw_csum = !!(device_attr.device_cap_flags &
961                                    IBV_DEVICE_RAW_IP_CSUM);
962                 DEBUG("checksum offloading is %ssupported",
963                       (priv->hw_csum ? "" : "not "));
964                 /* Only ConnectX-3 Pro supports tunneling. */
965                 priv->hw_csum_l2tun =
966                         priv->hw_csum &&
967                         (device_attr.vendor_part_id ==
968                          PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO);
969                 DEBUG("L2 tunnel checksum offloads are %ssupported",
970                       priv->hw_csum_l2tun ? "" : "not ");
971                 priv->hw_rss_sup = mlx4_hw_rss_sup(priv->ctx, priv->pd,
972                                                    &device_attr_ex);
973                 DEBUG("supported RSS hash fields mask: %016" PRIx64,
974                       priv->hw_rss_sup);
975                 priv->hw_rss_max_qps =
976                         device_attr_ex.rss_caps.max_rwq_indirection_table_size;
977                 DEBUG("MAX RSS queues %d", priv->hw_rss_max_qps);
978                 priv->hw_fcs_strip = !!(device_attr_ex.raw_packet_caps &
979                                         IBV_RAW_PACKET_CAP_SCATTER_FCS);
980                 DEBUG("FCS stripping toggling is %ssupported",
981                       priv->hw_fcs_strip ? "" : "not ");
982                 priv->tso =
983                         ((device_attr_ex.tso_caps.max_tso > 0) &&
984                          (device_attr_ex.tso_caps.supported_qpts &
985                           (1 << IBV_QPT_RAW_PACKET)));
986                 if (priv->tso)
987                         priv->tso_max_payload_sz =
988                                         device_attr_ex.tso_caps.max_tso;
989                 DEBUG("TSO is %ssupported",
990                       priv->tso ? "" : "not ");
991                 priv->mr_ext_memseg_en = conf.mr_ext_memseg_en;
992                 /* Configure the first MAC address by default. */
993                 err = mlx4_get_mac(priv, &mac.addr_bytes);
994                 if (err) {
995                         ERROR("cannot get MAC address, is mlx4_en loaded?"
996                               " (error: %s)", strerror(err));
997                         goto port_error;
998                 }
999                 INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
1000                      priv->port,
1001                      mac.addr_bytes[0], mac.addr_bytes[1],
1002                      mac.addr_bytes[2], mac.addr_bytes[3],
1003                      mac.addr_bytes[4], mac.addr_bytes[5]);
1004                 /* Register MAC address. */
1005                 priv->mac[0] = mac;
1006
1007                 if (mlx4_get_ifname(priv, &ifname) == 0) {
1008                         DEBUG("port %u ifname is \"%s\"",
1009                               priv->port, ifname);
1010                         priv->if_index = if_nametoindex(ifname);
1011                 } else {
1012                         DEBUG("port %u ifname is unknown", priv->port);
1013                 }
1014
1015                 /* Get actual MTU if possible. */
1016                 mlx4_mtu_get(priv, &priv->mtu);
1017                 DEBUG("port %u MTU is %u", priv->port, priv->mtu);
1018                 eth_dev = rte_eth_dev_allocate(name);
1019                 if (eth_dev == NULL) {
1020                         err = ENOMEM;
1021                         ERROR("can not allocate rte ethdev");
1022                         goto port_error;
1023                 }
1024                 eth_dev->data->dev_private = priv;
1025                 eth_dev->data->mac_addrs = priv->mac;
1026                 eth_dev->device = &pci_dev->device;
1027                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1028                 /* Initialize local interrupt handle for current port. */
1029                 priv->intr_handle = (struct rte_intr_handle){
1030                         .fd = -1,
1031                         .type = RTE_INTR_HANDLE_EXT,
1032                 };
1033                 /*
1034                  * Override ethdev interrupt handle pointer with private
1035                  * handle instead of that of the parent PCI device used by
1036                  * default. This prevents it from being shared between all
1037                  * ports of the same PCI device since each of them is
1038                  * associated its own Verbs context.
1039                  *
1040                  * Rx interrupts in particular require this as the PMD has
1041                  * no control over the registration of queue interrupts
1042                  * besides setting up eth_dev->intr_handle, the rest is
1043                  * handled by rte_intr_rx_ctl().
1044                  */
1045                 eth_dev->intr_handle = &priv->intr_handle;
1046                 priv->dev_data = eth_dev->data;
1047                 eth_dev->dev_ops = &mlx4_dev_ops;
1048 #ifdef HAVE_IBV_MLX4_BUF_ALLOCATORS
1049                 /* Hint libmlx4 to use PMD allocator for data plane resources */
1050                 struct mlx4dv_ctx_allocators alctr = {
1051                         .alloc = &mlx4_alloc_verbs_buf,
1052                         .free = &mlx4_free_verbs_buf,
1053                         .data = priv,
1054                 };
1055                 err = mlx4_glue->dv_set_context_attr
1056                         (ctx, MLX4DV_SET_CTX_ATTR_BUF_ALLOCATORS,
1057                          (void *)((uintptr_t)&alctr));
1058                 if (err)
1059                         WARN("Verbs external allocator is not supported");
1060                 else
1061                         priv->verbs_alloc_ctx.enabled = 1;
1062 #endif
1063                 /* Bring Ethernet device up. */
1064                 DEBUG("forcing Ethernet interface up");
1065                 mlx4_dev_set_link_up(eth_dev);
1066                 /* Update link status once if waiting for LSC. */
1067                 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1068                         mlx4_link_update(eth_dev, 0);
1069                 /*
1070                  * Once the device is added to the list of memory event
1071                  * callback, its global MR cache table cannot be expanded
1072                  * on the fly because of deadlock. If it overflows, lookup
1073                  * should be done by searching MR list linearly, which is slow.
1074                  */
1075                 err = mlx4_mr_btree_init(&priv->mr.cache,
1076                                          MLX4_MR_BTREE_CACHE_N * 2,
1077                                          eth_dev->device->numa_node);
1078                 if (err) {
1079                         /* rte_errno is already set. */
1080                         goto port_error;
1081                 }
1082                 /* Add device to memory callback list. */
1083                 rte_rwlock_write_lock(&mlx4_shared_data->mem_event_rwlock);
1084                 LIST_INSERT_HEAD(&mlx4_shared_data->mem_event_cb_list,
1085                                  priv, mem_event_cb);
1086                 rte_rwlock_write_unlock(&mlx4_shared_data->mem_event_rwlock);
1087                 rte_eth_dev_probing_finish(eth_dev);
1088                 continue;
1089 port_error:
1090                 rte_free(priv);
1091                 if (eth_dev != NULL)
1092                         eth_dev->data->dev_private = NULL;
1093                 if (pd)
1094                         claim_zero(mlx4_glue->dealloc_pd(pd));
1095                 if (ctx)
1096                         claim_zero(mlx4_glue->close_device(ctx));
1097                 if (eth_dev != NULL) {
1098                         /* mac_addrs must not be freed because part of dev_private */
1099                         eth_dev->data->mac_addrs = NULL;
1100                         rte_eth_dev_release_port(eth_dev);
1101                 }
1102                 break;
1103         }
1104         /*
1105          * XXX if something went wrong in the loop above, there is a resource
1106          * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
1107          * long as the dpdk does not provide a way to deallocate a ethdev and a
1108          * way to enumerate the registered ethdevs to free the previous ones.
1109          */
1110 error:
1111         if (attr_ctx)
1112                 claim_zero(mlx4_glue->close_device(attr_ctx));
1113         if (list)
1114                 mlx4_glue->free_device_list(list);
1115         if (err)
1116                 rte_errno = err;
1117         return -err;
1118 }
1119
1120 static const struct rte_pci_id mlx4_pci_id_map[] = {
1121         {
1122                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1123                                PCI_DEVICE_ID_MELLANOX_CONNECTX3)
1124         },
1125         {
1126                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1127                                PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO)
1128         },
1129         {
1130                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1131                                PCI_DEVICE_ID_MELLANOX_CONNECTX3VF)
1132         },
1133         {
1134                 .vendor_id = 0
1135         }
1136 };
1137
1138 static struct rte_pci_driver mlx4_driver = {
1139         .driver = {
1140                 .name = MLX4_DRIVER_NAME
1141         },
1142         .id_table = mlx4_pci_id_map,
1143         .probe = mlx4_pci_probe,
1144         .drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_INTR_RMV,
1145 };
1146
1147 #ifdef RTE_IBVERBS_LINK_DLOPEN
1148
1149 /**
1150  * Suffix RTE_EAL_PMD_PATH with "-glue".
1151  *
1152  * This function performs a sanity check on RTE_EAL_PMD_PATH before
1153  * suffixing its last component.
1154  *
1155  * @param buf[out]
1156  *   Output buffer, should be large enough otherwise NULL is returned.
1157  * @param size
1158  *   Size of @p out.
1159  *
1160  * @return
1161  *   Pointer to @p buf or @p NULL in case suffix cannot be appended.
1162  */
1163 static char *
1164 mlx4_glue_path(char *buf, size_t size)
1165 {
1166         static const char *const bad[] = { "/", ".", "..", NULL };
1167         const char *path = RTE_EAL_PMD_PATH;
1168         size_t len = strlen(path);
1169         size_t off;
1170         int i;
1171
1172         while (len && path[len - 1] == '/')
1173                 --len;
1174         for (off = len; off && path[off - 1] != '/'; --off)
1175                 ;
1176         for (i = 0; bad[i]; ++i)
1177                 if (!strncmp(path + off, bad[i], (int)(len - off)))
1178                         goto error;
1179         i = snprintf(buf, size, "%.*s-glue", (int)len, path);
1180         if (i == -1 || (size_t)i >= size)
1181                 goto error;
1182         return buf;
1183 error:
1184         ERROR("unable to append \"-glue\" to last component of"
1185               " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
1186               " please re-configure DPDK");
1187         return NULL;
1188 }
1189
1190 /**
1191  * Initialization routine for run-time dependency on rdma-core.
1192  */
1193 static int
1194 mlx4_glue_init(void)
1195 {
1196         char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
1197         const char *path[] = {
1198                 /*
1199                  * A basic security check is necessary before trusting
1200                  * MLX4_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
1201                  */
1202                 (geteuid() == getuid() && getegid() == getgid() ?
1203                  getenv("MLX4_GLUE_PATH") : NULL),
1204                 /*
1205                  * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
1206                  * variant, otherwise let dlopen() look up libraries on its
1207                  * own.
1208                  */
1209                 (*RTE_EAL_PMD_PATH ?
1210                  mlx4_glue_path(glue_path, sizeof(glue_path)) : ""),
1211         };
1212         unsigned int i = 0;
1213         void *handle = NULL;
1214         void **sym;
1215         const char *dlmsg;
1216
1217         while (!handle && i != RTE_DIM(path)) {
1218                 const char *end;
1219                 size_t len;
1220                 int ret;
1221
1222                 if (!path[i]) {
1223                         ++i;
1224                         continue;
1225                 }
1226                 end = strpbrk(path[i], ":;");
1227                 if (!end)
1228                         end = path[i] + strlen(path[i]);
1229                 len = end - path[i];
1230                 ret = 0;
1231                 do {
1232                         char name[ret + 1];
1233
1234                         ret = snprintf(name, sizeof(name), "%.*s%s" MLX4_GLUE,
1235                                        (int)len, path[i],
1236                                        (!len || *(end - 1) == '/') ? "" : "/");
1237                         if (ret == -1)
1238                                 break;
1239                         if (sizeof(name) != (size_t)ret + 1)
1240                                 continue;
1241                         DEBUG("looking for rdma-core glue as \"%s\"", name);
1242                         handle = dlopen(name, RTLD_LAZY);
1243                         break;
1244                 } while (1);
1245                 path[i] = end + 1;
1246                 if (!*end)
1247                         ++i;
1248         }
1249         if (!handle) {
1250                 rte_errno = EINVAL;
1251                 dlmsg = dlerror();
1252                 if (dlmsg)
1253                         WARN("cannot load glue library: %s", dlmsg);
1254                 goto glue_error;
1255         }
1256         sym = dlsym(handle, "mlx4_glue");
1257         if (!sym || !*sym) {
1258                 rte_errno = EINVAL;
1259                 dlmsg = dlerror();
1260                 if (dlmsg)
1261                         ERROR("cannot resolve glue symbol: %s", dlmsg);
1262                 goto glue_error;
1263         }
1264         mlx4_glue = *sym;
1265         return 0;
1266 glue_error:
1267         if (handle)
1268                 dlclose(handle);
1269         WARN("cannot initialize PMD due to missing run-time"
1270              " dependency on rdma-core libraries (libibverbs,"
1271              " libmlx4)");
1272         return -rte_errno;
1273 }
1274
1275 #endif
1276
1277 /**
1278  * Driver initialization routine.
1279  */
1280 RTE_INIT(rte_mlx4_pmd_init)
1281 {
1282         /* Initialize driver log type. */
1283         mlx4_logtype = rte_log_register("pmd.net.mlx4");
1284         if (mlx4_logtype >= 0)
1285                 rte_log_set_level(mlx4_logtype, RTE_LOG_NOTICE);
1286
1287         /*
1288          * MLX4_DEVICE_FATAL_CLEANUP tells ibv_destroy functions we
1289          * want to get success errno value in case of calling them
1290          * when the device was removed.
1291          */
1292         setenv("MLX4_DEVICE_FATAL_CLEANUP", "1", 1);
1293         /*
1294          * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
1295          * huge pages. Calling ibv_fork_init() during init allows
1296          * applications to use fork() safely for purposes other than
1297          * using this PMD, which is not supported in forked processes.
1298          */
1299         setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
1300 #ifdef RTE_IBVERBS_LINK_DLOPEN
1301         if (mlx4_glue_init())
1302                 return;
1303         assert(mlx4_glue);
1304 #endif
1305 #ifndef NDEBUG
1306         /* Glue structure must not contain any NULL pointers. */
1307         {
1308                 unsigned int i;
1309
1310                 for (i = 0; i != sizeof(*mlx4_glue) / sizeof(void *); ++i)
1311                         assert(((const void *const *)mlx4_glue)[i]);
1312         }
1313 #endif
1314         if (strcmp(mlx4_glue->version, MLX4_GLUE_VERSION)) {
1315                 ERROR("rdma-core glue \"%s\" mismatch: \"%s\" is required",
1316                       mlx4_glue->version, MLX4_GLUE_VERSION);
1317                 return;
1318         }
1319         mlx4_glue->fork_init();
1320         rte_pci_register(&mlx4_driver);
1321 }
1322
1323 RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__);
1324 RTE_PMD_REGISTER_PCI_TABLE(net_mlx4, mlx4_pci_id_map);
1325 RTE_PMD_REGISTER_KMOD_DEP(net_mlx4,
1326         "* ib_uverbs & mlx4_en & mlx4_core & mlx4_ib");