ad7c805d67156fe038ce6a12f99175d4ba1cbcda
[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 <errno.h>
12 #include <inttypes.h>
13 #include <stddef.h>
14 #include <stdint.h>
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <string.h>
18 #include <sys/mman.h>
19 #include <unistd.h>
20 #ifdef RTE_IBVERBS_LINK_DLOPEN
21 #include <dlfcn.h>
22 #endif
23
24 /* Verbs headers do not support -pedantic. */
25 #ifdef PEDANTIC
26 #pragma GCC diagnostic ignored "-Wpedantic"
27 #endif
28 #include <infiniband/verbs.h>
29 #ifdef PEDANTIC
30 #pragma GCC diagnostic error "-Wpedantic"
31 #endif
32
33 #include <rte_common.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 #ifdef MLX4_GLUE
53 const struct mlx4_glue *mlx4_glue;
54 #endif
55
56 static const char *MZ_MLX4_PMD_SHARED_DATA = "mlx4_pmd_shared_data";
57
58 /* Shared memory between primary and secondary processes. */
59 struct mlx4_shared_data *mlx4_shared_data;
60
61 /* Spinlock for mlx4_shared_data allocation. */
62 static rte_spinlock_t mlx4_shared_data_lock = RTE_SPINLOCK_INITIALIZER;
63
64 /* Process local data for secondary processes. */
65 static struct mlx4_local_data mlx4_local_data;
66
67 /** Configuration structure for device arguments. */
68 struct mlx4_conf {
69         struct {
70                 uint32_t present; /**< Bit-field for existing ports. */
71                 uint32_t enabled; /**< Bit-field for user-enabled ports. */
72         } ports;
73         int mr_ext_memseg_en;
74         /** Whether memseg should be extended for MR creation. */
75 };
76
77 /* Available parameters list. */
78 const char *pmd_mlx4_init_params[] = {
79         MLX4_PMD_PORT_KVARG,
80         MLX4_MR_EXT_MEMSEG_EN_KVARG,
81         NULL,
82 };
83
84 static void mlx4_dev_stop(struct rte_eth_dev *dev);
85
86 /**
87  * Initialize shared data between primary and secondary process.
88  *
89  * A memzone is reserved by primary process and secondary processes attach to
90  * the memzone.
91  *
92  * @return
93  *   0 on success, a negative errno value otherwise and rte_errno is set.
94  */
95 static int
96 mlx4_init_shared_data(void)
97 {
98         const struct rte_memzone *mz;
99         int ret = 0;
100
101         rte_spinlock_lock(&mlx4_shared_data_lock);
102         if (mlx4_shared_data == NULL) {
103                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
104                         /* Allocate shared memory. */
105                         mz = rte_memzone_reserve(MZ_MLX4_PMD_SHARED_DATA,
106                                                  sizeof(*mlx4_shared_data),
107                                                  SOCKET_ID_ANY, 0);
108                         if (mz == NULL) {
109                                 ERROR("Cannot allocate mlx4 shared data\n");
110                                 ret = -rte_errno;
111                                 goto error;
112                         }
113                         mlx4_shared_data = mz->addr;
114                         memset(mlx4_shared_data, 0, sizeof(*mlx4_shared_data));
115                         rte_spinlock_init(&mlx4_shared_data->lock);
116                 } else {
117                         /* Lookup allocated shared memory. */
118                         mz = rte_memzone_lookup(MZ_MLX4_PMD_SHARED_DATA);
119                         if (mz == NULL) {
120                                 ERROR("Cannot attach mlx4 shared data\n");
121                                 ret = -rte_errno;
122                                 goto error;
123                         }
124                         mlx4_shared_data = mz->addr;
125                         memset(&mlx4_local_data, 0, sizeof(mlx4_local_data));
126                 }
127         }
128 error:
129         rte_spinlock_unlock(&mlx4_shared_data_lock);
130         return ret;
131 }
132
133 #ifdef HAVE_IBV_MLX4_BUF_ALLOCATORS
134 /**
135  * Verbs callback to allocate a memory. This function should allocate the space
136  * according to the size provided residing inside a huge page.
137  * Please note that all allocation must respect the alignment from libmlx4
138  * (i.e. currently sysconf(_SC_PAGESIZE)).
139  *
140  * @param[in] size
141  *   The size in bytes of the memory to allocate.
142  * @param[in] data
143  *   A pointer to the callback data.
144  *
145  * @return
146  *   Allocated buffer, NULL otherwise and rte_errno is set.
147  */
148 static void *
149 mlx4_alloc_verbs_buf(size_t size, void *data)
150 {
151         struct mlx4_priv *priv = data;
152         void *ret;
153         size_t alignment = sysconf(_SC_PAGESIZE);
154         unsigned int socket = SOCKET_ID_ANY;
155
156         if (priv->verbs_alloc_ctx.type == MLX4_VERBS_ALLOC_TYPE_TX_QUEUE) {
157                 const struct txq *txq = priv->verbs_alloc_ctx.obj;
158
159                 socket = txq->socket;
160         } else if (priv->verbs_alloc_ctx.type ==
161                    MLX4_VERBS_ALLOC_TYPE_RX_QUEUE) {
162                 const struct rxq *rxq = priv->verbs_alloc_ctx.obj;
163
164                 socket = rxq->socket;
165         }
166         MLX4_ASSERT(data != NULL);
167         ret = rte_malloc_socket(__func__, size, alignment, socket);
168         if (!ret && size)
169                 rte_errno = ENOMEM;
170         return ret;
171 }
172
173 /**
174  * Verbs callback to free a memory.
175  *
176  * @param[in] ptr
177  *   A pointer to the memory to free.
178  * @param[in] data
179  *   A pointer to the callback data.
180  */
181 static void
182 mlx4_free_verbs_buf(void *ptr, void *data __rte_unused)
183 {
184         MLX4_ASSERT(data != NULL);
185         rte_free(ptr);
186 }
187 #endif
188
189 /**
190  * Initialize process private data structure.
191  *
192  * @param dev
193  *   Pointer to Ethernet device structure.
194  *
195  * @return
196  *   0 on success, a negative errno value otherwise and rte_errno is set.
197  */
198 static int
199 mlx4_proc_priv_init(struct rte_eth_dev *dev)
200 {
201         struct mlx4_proc_priv *ppriv;
202         size_t ppriv_size;
203
204         /*
205          * UAR register table follows the process private structure. BlueFlame
206          * registers for Tx queues are stored in the table.
207          */
208         ppriv_size = sizeof(struct mlx4_proc_priv) +
209                      dev->data->nb_tx_queues * sizeof(void *);
210         ppriv = rte_malloc_socket("mlx4_proc_priv", ppriv_size,
211                                   RTE_CACHE_LINE_SIZE, dev->device->numa_node);
212         if (!ppriv) {
213                 rte_errno = ENOMEM;
214                 return -rte_errno;
215         }
216         ppriv->uar_table_sz = ppriv_size;
217         dev->process_private = ppriv;
218         return 0;
219 }
220
221 /**
222  * Un-initialize process private data structure.
223  *
224  * @param dev
225  *   Pointer to Ethernet device structure.
226  */
227 static void
228 mlx4_proc_priv_uninit(struct rte_eth_dev *dev)
229 {
230         if (!dev->process_private)
231                 return;
232         rte_free(dev->process_private);
233         dev->process_private = NULL;
234 }
235
236 /**
237  * DPDK callback for Ethernet device configuration.
238  *
239  * @param dev
240  *   Pointer to Ethernet device structure.
241  *
242  * @return
243  *   0 on success, negative errno value otherwise and rte_errno is set.
244  */
245 static int
246 mlx4_dev_configure(struct rte_eth_dev *dev)
247 {
248         struct mlx4_priv *priv = dev->data->dev_private;
249         struct rte_flow_error error;
250         int ret;
251
252         if (dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG)
253                 dev->data->dev_conf.rxmode.offloads |= DEV_RX_OFFLOAD_RSS_HASH;
254
255         /* Prepare internal flow rules. */
256         ret = mlx4_flow_sync(priv, &error);
257         if (ret) {
258                 ERROR("cannot set up internal flow rules (code %d, \"%s\"),"
259                       " flow error type %d, cause %p, message: %s",
260                       -ret, strerror(-ret), error.type, error.cause,
261                       error.message ? error.message : "(unspecified)");
262                 goto exit;
263         }
264         ret = mlx4_intr_install(priv);
265         if (ret) {
266                 ERROR("%p: interrupt handler installation failed",
267                       (void *)dev);
268                 goto exit;
269         }
270         ret = mlx4_proc_priv_init(dev);
271         if (ret) {
272                 ERROR("%p: process private data allocation failed",
273                       (void *)dev);
274                 goto exit;
275         }
276 exit:
277         return ret;
278 }
279
280 /**
281  * DPDK callback to start the device.
282  *
283  * Simulate device start by initializing common RSS resources and attaching
284  * all configured flows.
285  *
286  * @param dev
287  *   Pointer to Ethernet device structure.
288  *
289  * @return
290  *   0 on success, negative errno value otherwise and rte_errno is set.
291  */
292 static int
293 mlx4_dev_start(struct rte_eth_dev *dev)
294 {
295         struct mlx4_priv *priv = dev->data->dev_private;
296         struct rte_flow_error error;
297         int ret;
298
299         if (priv->started)
300                 return 0;
301         DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
302         priv->started = 1;
303         ret = mlx4_rss_init(priv);
304         if (ret) {
305                 ERROR("%p: cannot initialize RSS resources: %s",
306                       (void *)dev, strerror(-ret));
307                 goto err;
308         }
309 #ifdef RTE_LIBRTE_MLX4_DEBUG
310         mlx4_mr_dump_dev(dev);
311 #endif
312         ret = mlx4_rxq_intr_enable(priv);
313         if (ret) {
314                 ERROR("%p: interrupt handler installation failed",
315                      (void *)dev);
316                 goto err;
317         }
318         ret = mlx4_flow_sync(priv, &error);
319         if (ret) {
320                 ERROR("%p: cannot attach flow rules (code %d, \"%s\"),"
321                       " flow error type %d, cause %p, message: %s",
322                       (void *)dev,
323                       -ret, strerror(-ret), error.type, error.cause,
324                       error.message ? error.message : "(unspecified)");
325                 goto err;
326         }
327         rte_wmb();
328         dev->tx_pkt_burst = mlx4_tx_burst;
329         dev->rx_pkt_burst = mlx4_rx_burst;
330         /* Enable datapath on secondary process. */
331         mlx4_mp_req_start_rxtx(dev);
332         return 0;
333 err:
334         mlx4_dev_stop(dev);
335         return ret;
336 }
337
338 /**
339  * DPDK callback to stop the device.
340  *
341  * Simulate device stop by detaching all configured flows.
342  *
343  * @param dev
344  *   Pointer to Ethernet device structure.
345  */
346 static void
347 mlx4_dev_stop(struct rte_eth_dev *dev)
348 {
349         struct mlx4_priv *priv = dev->data->dev_private;
350
351         if (!priv->started)
352                 return;
353         DEBUG("%p: detaching flows from all RX queues", (void *)dev);
354         priv->started = 0;
355         dev->tx_pkt_burst = mlx4_tx_burst_removed;
356         dev->rx_pkt_burst = mlx4_rx_burst_removed;
357         rte_wmb();
358         /* Disable datapath on secondary process. */
359         mlx4_mp_req_stop_rxtx(dev);
360         mlx4_flow_sync(priv, NULL);
361         mlx4_rxq_intr_disable(priv);
362         mlx4_rss_deinit(priv);
363 }
364
365 /**
366  * DPDK callback to close the device.
367  *
368  * Destroy all queues and objects, free memory.
369  *
370  * @param dev
371  *   Pointer to Ethernet device structure.
372  */
373 static int
374 mlx4_dev_close(struct rte_eth_dev *dev)
375 {
376         struct mlx4_priv *priv = dev->data->dev_private;
377         unsigned int i;
378
379         DEBUG("%p: closing device \"%s\"",
380               (void *)dev,
381               ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
382         dev->rx_pkt_burst = mlx4_rx_burst_removed;
383         dev->tx_pkt_burst = mlx4_tx_burst_removed;
384         rte_wmb();
385         /* Disable datapath on secondary process. */
386         mlx4_mp_req_stop_rxtx(dev);
387         mlx4_flow_clean(priv);
388         mlx4_rss_deinit(priv);
389         for (i = 0; i != dev->data->nb_rx_queues; ++i)
390                 mlx4_rx_queue_release(dev->data->rx_queues[i]);
391         for (i = 0; i != dev->data->nb_tx_queues; ++i)
392                 mlx4_tx_queue_release(dev->data->tx_queues[i]);
393         mlx4_proc_priv_uninit(dev);
394         mlx4_mr_release(dev);
395         if (priv->pd != NULL) {
396                 MLX4_ASSERT(priv->ctx != NULL);
397                 claim_zero(mlx4_glue->dealloc_pd(priv->pd));
398                 claim_zero(mlx4_glue->close_device(priv->ctx));
399         } else
400                 MLX4_ASSERT(priv->ctx == NULL);
401         mlx4_intr_uninstall(priv);
402         memset(priv, 0, sizeof(*priv));
403         /* mac_addrs must not be freed because part of dev_private */
404         dev->data->mac_addrs = NULL;
405         return 0;
406 }
407
408 static const struct eth_dev_ops mlx4_dev_ops = {
409         .dev_configure = mlx4_dev_configure,
410         .dev_start = mlx4_dev_start,
411         .dev_stop = mlx4_dev_stop,
412         .dev_set_link_down = mlx4_dev_set_link_down,
413         .dev_set_link_up = mlx4_dev_set_link_up,
414         .dev_close = mlx4_dev_close,
415         .link_update = mlx4_link_update,
416         .promiscuous_enable = mlx4_promiscuous_enable,
417         .promiscuous_disable = mlx4_promiscuous_disable,
418         .allmulticast_enable = mlx4_allmulticast_enable,
419         .allmulticast_disable = mlx4_allmulticast_disable,
420         .mac_addr_remove = mlx4_mac_addr_remove,
421         .mac_addr_add = mlx4_mac_addr_add,
422         .mac_addr_set = mlx4_mac_addr_set,
423         .set_mc_addr_list = mlx4_set_mc_addr_list,
424         .stats_get = mlx4_stats_get,
425         .stats_reset = mlx4_stats_reset,
426         .fw_version_get = mlx4_fw_version_get,
427         .dev_infos_get = mlx4_dev_infos_get,
428         .dev_supported_ptypes_get = mlx4_dev_supported_ptypes_get,
429         .vlan_filter_set = mlx4_vlan_filter_set,
430         .rx_queue_setup = mlx4_rx_queue_setup,
431         .tx_queue_setup = mlx4_tx_queue_setup,
432         .rx_queue_release = mlx4_rx_queue_release,
433         .tx_queue_release = mlx4_tx_queue_release,
434         .flow_ctrl_get = mlx4_flow_ctrl_get,
435         .flow_ctrl_set = mlx4_flow_ctrl_set,
436         .mtu_set = mlx4_mtu_set,
437         .filter_ctrl = mlx4_filter_ctrl,
438         .rx_queue_intr_enable = mlx4_rx_intr_enable,
439         .rx_queue_intr_disable = mlx4_rx_intr_disable,
440         .is_removed = mlx4_is_removed,
441 };
442
443 /* Available operations from secondary process. */
444 static const struct eth_dev_ops mlx4_dev_sec_ops = {
445         .stats_get = mlx4_stats_get,
446         .stats_reset = mlx4_stats_reset,
447         .fw_version_get = mlx4_fw_version_get,
448         .dev_infos_get = mlx4_dev_infos_get,
449 };
450
451 /**
452  * Get PCI information from struct ibv_device.
453  *
454  * @param device
455  *   Pointer to Ethernet device structure.
456  * @param[out] pci_addr
457  *   PCI bus address output buffer.
458  *
459  * @return
460  *   0 on success, negative errno value otherwise and rte_errno is set.
461  */
462 static int
463 mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
464                             struct rte_pci_addr *pci_addr)
465 {
466         FILE *file;
467         char line[32];
468         MKSTR(path, "%s/device/uevent", device->ibdev_path);
469
470         file = fopen(path, "rb");
471         if (file == NULL) {
472                 rte_errno = errno;
473                 return -rte_errno;
474         }
475         while (fgets(line, sizeof(line), file) == line) {
476                 size_t len = strlen(line);
477                 int ret;
478
479                 /* Truncate long lines. */
480                 if (len == (sizeof(line) - 1))
481                         while (line[(len - 1)] != '\n') {
482                                 ret = fgetc(file);
483                                 if (ret == EOF)
484                                         break;
485                                 line[(len - 1)] = ret;
486                         }
487                 /* Extract information. */
488                 if (sscanf(line,
489                            "PCI_SLOT_NAME="
490                            "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
491                            &pci_addr->domain,
492                            &pci_addr->bus,
493                            &pci_addr->devid,
494                            &pci_addr->function) == 4) {
495                         break;
496                 }
497         }
498         fclose(file);
499         return 0;
500 }
501
502 /**
503  * Verify and store value for device argument.
504  *
505  * @param[in] key
506  *   Key argument to verify.
507  * @param[in] val
508  *   Value associated with key.
509  * @param[in, out] conf
510  *   Shared configuration data.
511  *
512  * @return
513  *   0 on success, negative errno value otherwise and rte_errno is set.
514  */
515 static int
516 mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf)
517 {
518         unsigned long tmp;
519
520         errno = 0;
521         tmp = strtoul(val, NULL, 0);
522         if (errno) {
523                 rte_errno = errno;
524                 WARN("%s: \"%s\" is not a valid integer", key, val);
525                 return -rte_errno;
526         }
527         if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
528                 uint32_t ports = rte_log2_u32(conf->ports.present + 1);
529
530                 if (tmp >= ports) {
531                         ERROR("port index %lu outside range [0,%" PRIu32 ")",
532                               tmp, ports);
533                         return -EINVAL;
534                 }
535                 if (!(conf->ports.present & (1 << tmp))) {
536                         rte_errno = EINVAL;
537                         ERROR("invalid port index %lu", tmp);
538                         return -rte_errno;
539                 }
540                 conf->ports.enabled |= 1 << tmp;
541         } else if (strcmp(MLX4_MR_EXT_MEMSEG_EN_KVARG, key) == 0) {
542                 conf->mr_ext_memseg_en = !!tmp;
543         } else {
544                 rte_errno = EINVAL;
545                 WARN("%s: unknown parameter", key);
546                 return -rte_errno;
547         }
548         return 0;
549 }
550
551 /**
552  * Parse device parameters.
553  *
554  * @param devargs
555  *   Device arguments structure.
556  *
557  * @return
558  *   0 on success, negative errno value otherwise and rte_errno is set.
559  */
560 static int
561 mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf)
562 {
563         struct rte_kvargs *kvlist;
564         unsigned int arg_count;
565         int ret = 0;
566         int i;
567
568         if (devargs == NULL)
569                 return 0;
570         kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params);
571         if (kvlist == NULL) {
572                 rte_errno = EINVAL;
573                 ERROR("failed to parse kvargs");
574                 return -rte_errno;
575         }
576         /* Process parameters. */
577         for (i = 0; pmd_mlx4_init_params[i]; ++i) {
578                 arg_count = rte_kvargs_count(kvlist, pmd_mlx4_init_params[i]);
579                 while (arg_count-- > 0) {
580                         ret = rte_kvargs_process(kvlist,
581                                                  pmd_mlx4_init_params[i],
582                                                  (int (*)(const char *,
583                                                           const char *,
584                                                           void *))
585                                                  mlx4_arg_parse,
586                                                  conf);
587                         if (ret != 0)
588                                 goto free_kvlist;
589                 }
590         }
591 free_kvlist:
592         rte_kvargs_free(kvlist);
593         return ret;
594 }
595
596 /**
597  * Interpret RSS capabilities reported by device.
598  *
599  * This function returns the set of usable Verbs RSS hash fields, kernel
600  * quirks taken into account.
601  *
602  * @param ctx
603  *   Verbs context.
604  * @param pd
605  *   Verbs protection domain.
606  * @param device_attr_ex
607  *   Extended device attributes to interpret.
608  *
609  * @return
610  *   Usable RSS hash fields mask in Verbs format.
611  */
612 static uint64_t
613 mlx4_hw_rss_sup(struct ibv_context *ctx, struct ibv_pd *pd,
614                 struct ibv_device_attr_ex *device_attr_ex)
615 {
616         uint64_t hw_rss_sup = device_attr_ex->rss_caps.rx_hash_fields_mask;
617         struct ibv_cq *cq = NULL;
618         struct ibv_wq *wq = NULL;
619         struct ibv_rwq_ind_table *ind = NULL;
620         struct ibv_qp *qp = NULL;
621
622         if (!hw_rss_sup) {
623                 WARN("no RSS capabilities reported; disabling support for UDP"
624                      " RSS and inner VXLAN RSS");
625                 return IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4 |
626                         IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6 |
627                         IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP;
628         }
629         if (!(hw_rss_sup & IBV_RX_HASH_INNER))
630                 return hw_rss_sup;
631         /*
632          * Although reported as supported, missing code in some Linux
633          * versions (v4.15, v4.16) prevents the creation of hash QPs with
634          * inner capability.
635          *
636          * There is no choice but to attempt to instantiate a temporary RSS
637          * context in order to confirm its support.
638          */
639         cq = mlx4_glue->create_cq(ctx, 1, NULL, NULL, 0);
640         wq = cq ? mlx4_glue->create_wq
641                 (ctx,
642                  &(struct ibv_wq_init_attr){
643                         .wq_type = IBV_WQT_RQ,
644                         .max_wr = 1,
645                         .max_sge = 1,
646                         .pd = pd,
647                         .cq = cq,
648                  }) : NULL;
649         ind = wq ? mlx4_glue->create_rwq_ind_table
650                 (ctx,
651                  &(struct ibv_rwq_ind_table_init_attr){
652                         .log_ind_tbl_size = 0,
653                         .ind_tbl = &wq,
654                         .comp_mask = 0,
655                  }) : NULL;
656         qp = ind ? mlx4_glue->create_qp_ex
657                 (ctx,
658                  &(struct ibv_qp_init_attr_ex){
659                         .comp_mask =
660                                 (IBV_QP_INIT_ATTR_PD |
661                                  IBV_QP_INIT_ATTR_RX_HASH |
662                                  IBV_QP_INIT_ATTR_IND_TABLE),
663                         .qp_type = IBV_QPT_RAW_PACKET,
664                         .pd = pd,
665                         .rwq_ind_tbl = ind,
666                         .rx_hash_conf = {
667                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
668                                 .rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE,
669                                 .rx_hash_key = mlx4_rss_hash_key_default,
670                                 .rx_hash_fields_mask = hw_rss_sup,
671                         },
672                  }) : NULL;
673         if (!qp) {
674                 WARN("disabling unusable inner RSS capability due to kernel"
675                      " quirk");
676                 hw_rss_sup &= ~IBV_RX_HASH_INNER;
677         } else {
678                 claim_zero(mlx4_glue->destroy_qp(qp));
679         }
680         if (ind)
681                 claim_zero(mlx4_glue->destroy_rwq_ind_table(ind));
682         if (wq)
683                 claim_zero(mlx4_glue->destroy_wq(wq));
684         if (cq)
685                 claim_zero(mlx4_glue->destroy_cq(cq));
686         return hw_rss_sup;
687 }
688
689 static struct rte_pci_driver mlx4_driver;
690
691 /**
692  * PMD global initialization.
693  *
694  * Independent from individual device, this function initializes global
695  * per-PMD data structures distinguishing primary and secondary processes.
696  * Hence, each initialization is called once per a process.
697  *
698  * @return
699  *   0 on success, a negative errno value otherwise and rte_errno is set.
700  */
701 static int
702 mlx4_init_once(void)
703 {
704         struct mlx4_shared_data *sd;
705         struct mlx4_local_data *ld = &mlx4_local_data;
706         int ret = 0;
707
708         if (mlx4_init_shared_data())
709                 return -rte_errno;
710         sd = mlx4_shared_data;
711         MLX4_ASSERT(sd);
712         rte_spinlock_lock(&sd->lock);
713         switch (rte_eal_process_type()) {
714         case RTE_PROC_PRIMARY:
715                 if (sd->init_done)
716                         break;
717                 LIST_INIT(&sd->mem_event_cb_list);
718                 rte_rwlock_init(&sd->mem_event_rwlock);
719                 rte_mem_event_callback_register("MLX4_MEM_EVENT_CB",
720                                                 mlx4_mr_mem_event_cb, NULL);
721                 ret = mlx4_mp_init_primary();
722                 if (ret)
723                         goto out;
724                 sd->init_done = 1;
725                 break;
726         case RTE_PROC_SECONDARY:
727                 if (ld->init_done)
728                         break;
729                 ret = mlx4_mp_init_secondary();
730                 if (ret)
731                         goto out;
732                 ++sd->secondary_cnt;
733                 ld->init_done = 1;
734                 break;
735         default:
736                 break;
737         }
738 out:
739         rte_spinlock_unlock(&sd->lock);
740         return ret;
741 }
742
743 /**
744  * DPDK callback to register a PCI device.
745  *
746  * This function creates an Ethernet device for each port of a given
747  * PCI device.
748  *
749  * @param[in] pci_drv
750  *   PCI driver structure (mlx4_driver).
751  * @param[in] pci_dev
752  *   PCI device information.
753  *
754  * @return
755  *   0 on success, negative errno value otherwise and rte_errno is set.
756  */
757 static int
758 mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
759 {
760         struct ibv_device **list;
761         struct ibv_device *ibv_dev;
762         int err = 0;
763         struct ibv_context *attr_ctx = NULL;
764         struct ibv_device_attr device_attr;
765         struct ibv_device_attr_ex device_attr_ex;
766         struct mlx4_conf conf = {
767                 .ports.present = 0,
768                 .mr_ext_memseg_en = 1,
769         };
770         unsigned int vf;
771         int i;
772         char ifname[IF_NAMESIZE];
773
774         (void)pci_drv;
775         err = mlx4_init_once();
776         if (err) {
777                 ERROR("unable to init PMD global data: %s",
778                       strerror(rte_errno));
779                 return -rte_errno;
780         }
781         MLX4_ASSERT(pci_drv == &mlx4_driver);
782         list = mlx4_glue->get_device_list(&i);
783         if (list == NULL) {
784                 rte_errno = errno;
785                 MLX4_ASSERT(rte_errno);
786                 if (rte_errno == ENOSYS)
787                         ERROR("cannot list devices, is ib_uverbs loaded?");
788                 return -rte_errno;
789         }
790         MLX4_ASSERT(i >= 0);
791         /*
792          * For each listed device, check related sysfs entry against
793          * the provided PCI ID.
794          */
795         while (i != 0) {
796                 struct rte_pci_addr pci_addr;
797
798                 --i;
799                 DEBUG("checking device \"%s\"", list[i]->name);
800                 if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
801                         continue;
802                 if ((pci_dev->addr.domain != pci_addr.domain) ||
803                     (pci_dev->addr.bus != pci_addr.bus) ||
804                     (pci_dev->addr.devid != pci_addr.devid) ||
805                     (pci_dev->addr.function != pci_addr.function))
806                         continue;
807                 vf = (pci_dev->id.device_id ==
808                       PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
809                 INFO("PCI information matches, using device \"%s\" (VF: %s)",
810                      list[i]->name, (vf ? "true" : "false"));
811                 attr_ctx = mlx4_glue->open_device(list[i]);
812                 err = errno;
813                 break;
814         }
815         if (attr_ctx == NULL) {
816                 mlx4_glue->free_device_list(list);
817                 switch (err) {
818                 case 0:
819                         rte_errno = ENODEV;
820                         ERROR("cannot access device, is mlx4_ib loaded?");
821                         return -rte_errno;
822                 case EINVAL:
823                         rte_errno = EINVAL;
824                         ERROR("cannot use device, are drivers up to date?");
825                         return -rte_errno;
826                 }
827                 MLX4_ASSERT(err > 0);
828                 rte_errno = err;
829                 return -rte_errno;
830         }
831         ibv_dev = list[i];
832         DEBUG("device opened");
833         if (mlx4_glue->query_device(attr_ctx, &device_attr)) {
834                 err = ENODEV;
835                 goto error;
836         }
837         INFO("%u port(s) detected", device_attr.phys_port_cnt);
838         conf.ports.present |= (UINT64_C(1) << device_attr.phys_port_cnt) - 1;
839         if (mlx4_args(pci_dev->device.devargs, &conf)) {
840                 ERROR("failed to process device arguments");
841                 err = EINVAL;
842                 goto error;
843         }
844         /* Use all ports when none are defined */
845         if (!conf.ports.enabled)
846                 conf.ports.enabled = conf.ports.present;
847         /* Retrieve extended device attributes. */
848         if (mlx4_glue->query_device_ex(attr_ctx, NULL, &device_attr_ex)) {
849                 err = ENODEV;
850                 goto error;
851         }
852         MLX4_ASSERT(device_attr.max_sge >= MLX4_MAX_SGE);
853         for (i = 0; i < device_attr.phys_port_cnt; i++) {
854                 uint32_t port = i + 1; /* ports are indexed from one */
855                 struct ibv_context *ctx = NULL;
856                 struct ibv_port_attr port_attr;
857                 struct ibv_pd *pd = NULL;
858                 struct mlx4_priv *priv = NULL;
859                 struct rte_eth_dev *eth_dev = NULL;
860                 struct rte_ether_addr mac;
861                 char name[RTE_ETH_NAME_MAX_LEN];
862
863                 /* If port is not enabled, skip. */
864                 if (!(conf.ports.enabled & (1 << i)))
865                         continue;
866                 DEBUG("using port %u", port);
867                 ctx = mlx4_glue->open_device(ibv_dev);
868                 if (ctx == NULL) {
869                         err = ENODEV;
870                         goto port_error;
871                 }
872                 snprintf(name, sizeof(name), "%s port %u",
873                          mlx4_glue->get_device_name(ibv_dev), port);
874                 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
875                         eth_dev = rte_eth_dev_attach_secondary(name);
876                         if (eth_dev == NULL) {
877                                 ERROR("can not attach rte ethdev");
878                                 rte_errno = ENOMEM;
879                                 err = rte_errno;
880                                 goto error;
881                         }
882                         priv = eth_dev->data->dev_private;
883                         if (!priv->verbs_alloc_ctx.enabled) {
884                                 ERROR("secondary process is not supported"
885                                       " due to lack of external allocator"
886                                       " from Verbs");
887                                 rte_errno = ENOTSUP;
888                                 err = rte_errno;
889                                 goto error;
890                         }
891                         eth_dev->device = &pci_dev->device;
892                         eth_dev->dev_ops = &mlx4_dev_sec_ops;
893                         err = mlx4_proc_priv_init(eth_dev);
894                         if (err)
895                                 goto error;
896                         /* Receive command fd from primary process. */
897                         err = mlx4_mp_req_verbs_cmd_fd(eth_dev);
898                         if (err < 0) {
899                                 err = rte_errno;
900                                 goto error;
901                         }
902                         /* Remap UAR for Tx queues. */
903                         err = mlx4_tx_uar_init_secondary(eth_dev, err);
904                         if (err) {
905                                 err = rte_errno;
906                                 goto error;
907                         }
908                         /*
909                          * Ethdev pointer is still required as input since
910                          * the primary device is not accessible from the
911                          * secondary process.
912                          */
913                         eth_dev->tx_pkt_burst = mlx4_tx_burst;
914                         eth_dev->rx_pkt_burst = mlx4_rx_burst;
915                         claim_zero(mlx4_glue->close_device(ctx));
916                         rte_eth_copy_pci_info(eth_dev, pci_dev);
917                         rte_eth_dev_probing_finish(eth_dev);
918                         continue;
919                 }
920                 /* Check port status. */
921                 err = mlx4_glue->query_port(ctx, port, &port_attr);
922                 if (err) {
923                         err = ENODEV;
924                         ERROR("port query failed: %s", strerror(err));
925                         goto port_error;
926                 }
927                 if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
928                         err = ENOTSUP;
929                         ERROR("port %d is not configured in Ethernet mode",
930                               port);
931                         goto port_error;
932                 }
933                 if (port_attr.state != IBV_PORT_ACTIVE)
934                         DEBUG("port %d is not active: \"%s\" (%d)",
935                               port, mlx4_glue->port_state_str(port_attr.state),
936                               port_attr.state);
937                 /* Make asynchronous FD non-blocking to handle interrupts. */
938                 err = mlx4_fd_set_non_blocking(ctx->async_fd);
939                 if (err) {
940                         ERROR("cannot make asynchronous FD non-blocking: %s",
941                               strerror(err));
942                         goto port_error;
943                 }
944                 /* Allocate protection domain. */
945                 pd = mlx4_glue->alloc_pd(ctx);
946                 if (pd == NULL) {
947                         err = ENOMEM;
948                         ERROR("PD allocation failure");
949                         goto port_error;
950                 }
951                 /* from rte_ethdev.c */
952                 priv = rte_zmalloc("ethdev private structure",
953                                    sizeof(*priv),
954                                    RTE_CACHE_LINE_SIZE);
955                 if (priv == NULL) {
956                         err = ENOMEM;
957                         ERROR("priv allocation failure");
958                         goto port_error;
959                 }
960                 priv->ctx = ctx;
961                 priv->device_attr = device_attr;
962                 priv->port = port;
963                 priv->pd = pd;
964                 priv->mtu = RTE_ETHER_MTU;
965                 priv->vf = vf;
966                 priv->hw_csum = !!(device_attr.device_cap_flags &
967                                    IBV_DEVICE_RAW_IP_CSUM);
968                 DEBUG("checksum offloading is %ssupported",
969                       (priv->hw_csum ? "" : "not "));
970                 /* Only ConnectX-3 Pro supports tunneling. */
971                 priv->hw_csum_l2tun =
972                         priv->hw_csum &&
973                         (device_attr.vendor_part_id ==
974                          PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO);
975                 DEBUG("L2 tunnel checksum offloads are %ssupported",
976                       priv->hw_csum_l2tun ? "" : "not ");
977                 priv->hw_rss_sup = mlx4_hw_rss_sup(priv->ctx, priv->pd,
978                                                    &device_attr_ex);
979                 DEBUG("supported RSS hash fields mask: %016" PRIx64,
980                       priv->hw_rss_sup);
981                 priv->hw_rss_max_qps =
982                         device_attr_ex.rss_caps.max_rwq_indirection_table_size;
983                 DEBUG("MAX RSS queues %d", priv->hw_rss_max_qps);
984                 priv->hw_fcs_strip = !!(device_attr_ex.raw_packet_caps &
985                                         IBV_RAW_PACKET_CAP_SCATTER_FCS);
986                 DEBUG("FCS stripping toggling is %ssupported",
987                       priv->hw_fcs_strip ? "" : "not ");
988                 priv->tso =
989                         ((device_attr_ex.tso_caps.max_tso > 0) &&
990                          (device_attr_ex.tso_caps.supported_qpts &
991                           (1 << IBV_QPT_RAW_PACKET)));
992                 if (priv->tso)
993                         priv->tso_max_payload_sz =
994                                         device_attr_ex.tso_caps.max_tso;
995                 DEBUG("TSO is %ssupported",
996                       priv->tso ? "" : "not ");
997                 priv->mr_ext_memseg_en = conf.mr_ext_memseg_en;
998                 /* Configure the first MAC address by default. */
999                 err = mlx4_get_mac(priv, &mac.addr_bytes);
1000                 if (err) {
1001                         ERROR("cannot get MAC address, is mlx4_en loaded?"
1002                               " (error: %s)", strerror(err));
1003                         goto port_error;
1004                 }
1005                 INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
1006                      priv->port,
1007                      mac.addr_bytes[0], mac.addr_bytes[1],
1008                      mac.addr_bytes[2], mac.addr_bytes[3],
1009                      mac.addr_bytes[4], mac.addr_bytes[5]);
1010                 /* Register MAC address. */
1011                 priv->mac[0] = mac;
1012
1013                 if (mlx4_get_ifname(priv, &ifname) == 0) {
1014                         DEBUG("port %u ifname is \"%s\"",
1015                               priv->port, ifname);
1016                         priv->if_index = if_nametoindex(ifname);
1017                 } else {
1018                         DEBUG("port %u ifname is unknown", priv->port);
1019                 }
1020
1021                 /* Get actual MTU if possible. */
1022                 mlx4_mtu_get(priv, &priv->mtu);
1023                 DEBUG("port %u MTU is %u", priv->port, priv->mtu);
1024                 eth_dev = rte_eth_dev_allocate(name);
1025                 if (eth_dev == NULL) {
1026                         err = ENOMEM;
1027                         ERROR("can not allocate rte ethdev");
1028                         goto port_error;
1029                 }
1030                 eth_dev->data->dev_flags |= RTE_ETH_DEV_CLOSE_REMOVE;
1031                 eth_dev->data->dev_private = priv;
1032                 eth_dev->data->mac_addrs = priv->mac;
1033                 eth_dev->device = &pci_dev->device;
1034                 rte_eth_copy_pci_info(eth_dev, pci_dev);
1035                 /* Initialize local interrupt handle for current port. */
1036                 memset(&priv->intr_handle, 0, sizeof(struct rte_intr_handle));
1037                 priv->intr_handle.fd = -1;
1038                 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1039                 /*
1040                  * Override ethdev interrupt handle pointer with private
1041                  * handle instead of that of the parent PCI device used by
1042                  * default. This prevents it from being shared between all
1043                  * ports of the same PCI device since each of them is
1044                  * associated its own Verbs context.
1045                  *
1046                  * Rx interrupts in particular require this as the PMD has
1047                  * no control over the registration of queue interrupts
1048                  * besides setting up eth_dev->intr_handle, the rest is
1049                  * handled by rte_intr_rx_ctl().
1050                  */
1051                 eth_dev->intr_handle = &priv->intr_handle;
1052                 priv->dev_data = eth_dev->data;
1053                 eth_dev->dev_ops = &mlx4_dev_ops;
1054 #ifdef HAVE_IBV_MLX4_BUF_ALLOCATORS
1055                 /* Hint libmlx4 to use PMD allocator for data plane resources */
1056                 err = mlx4_glue->dv_set_context_attr
1057                         (ctx, MLX4DV_SET_CTX_ATTR_BUF_ALLOCATORS,
1058                          (void *)((uintptr_t)&(struct mlx4dv_ctx_allocators){
1059                                  .alloc = &mlx4_alloc_verbs_buf,
1060                                  .free = &mlx4_free_verbs_buf,
1061                                  .data = priv,
1062                         }));
1063                 if (err)
1064                         WARN("Verbs external allocator is not supported");
1065                 else
1066                         priv->verbs_alloc_ctx.enabled = 1;
1067 #endif
1068                 /* Bring Ethernet device up. */
1069                 DEBUG("forcing Ethernet interface up");
1070                 mlx4_dev_set_link_up(eth_dev);
1071                 /* Update link status once if waiting for LSC. */
1072                 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1073                         mlx4_link_update(eth_dev, 0);
1074                 /*
1075                  * Once the device is added to the list of memory event
1076                  * callback, its global MR cache table cannot be expanded
1077                  * on the fly because of deadlock. If it overflows, lookup
1078                  * should be done by searching MR list linearly, which is slow.
1079                  */
1080                 err = mlx4_mr_btree_init(&priv->mr.cache,
1081                                          MLX4_MR_BTREE_CACHE_N * 2,
1082                                          eth_dev->device->numa_node);
1083                 if (err) {
1084                         /* rte_errno is already set. */
1085                         goto port_error;
1086                 }
1087                 /* Add device to memory callback list. */
1088                 rte_rwlock_write_lock(&mlx4_shared_data->mem_event_rwlock);
1089                 LIST_INSERT_HEAD(&mlx4_shared_data->mem_event_cb_list,
1090                                  priv, mem_event_cb);
1091                 rte_rwlock_write_unlock(&mlx4_shared_data->mem_event_rwlock);
1092                 rte_eth_dev_probing_finish(eth_dev);
1093                 continue;
1094 port_error:
1095                 rte_free(priv);
1096                 if (eth_dev != NULL)
1097                         eth_dev->data->dev_private = NULL;
1098                 if (pd)
1099                         claim_zero(mlx4_glue->dealloc_pd(pd));
1100                 if (ctx)
1101                         claim_zero(mlx4_glue->close_device(ctx));
1102                 if (eth_dev != NULL) {
1103                         /* mac_addrs must not be freed because part of dev_private */
1104                         eth_dev->data->mac_addrs = NULL;
1105                         rte_eth_dev_release_port(eth_dev);
1106                 }
1107                 break;
1108         }
1109         /*
1110          * XXX if something went wrong in the loop above, there is a resource
1111          * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
1112          * long as the dpdk does not provide a way to deallocate a ethdev and a
1113          * way to enumerate the registered ethdevs to free the previous ones.
1114          */
1115 error:
1116         if (attr_ctx)
1117                 claim_zero(mlx4_glue->close_device(attr_ctx));
1118         if (list)
1119                 mlx4_glue->free_device_list(list);
1120         if (err)
1121                 rte_errno = err;
1122         return -err;
1123 }
1124
1125 static const struct rte_pci_id mlx4_pci_id_map[] = {
1126         {
1127                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1128                                PCI_DEVICE_ID_MELLANOX_CONNECTX3)
1129         },
1130         {
1131                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1132                                PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO)
1133         },
1134         {
1135                 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1136                                PCI_DEVICE_ID_MELLANOX_CONNECTX3VF)
1137         },
1138         {
1139                 .vendor_id = 0
1140         }
1141 };
1142
1143 static struct rte_pci_driver mlx4_driver = {
1144         .driver = {
1145                 .name = MLX4_DRIVER_NAME
1146         },
1147         .id_table = mlx4_pci_id_map,
1148         .probe = mlx4_pci_probe,
1149         .drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_INTR_RMV,
1150 };
1151
1152 #ifdef RTE_IBVERBS_LINK_DLOPEN
1153
1154 /**
1155  * Suffix RTE_EAL_PMD_PATH with "-glue".
1156  *
1157  * This function performs a sanity check on RTE_EAL_PMD_PATH before
1158  * suffixing its last component.
1159  *
1160  * @param buf[out]
1161  *   Output buffer, should be large enough otherwise NULL is returned.
1162  * @param size
1163  *   Size of @p out.
1164  *
1165  * @return
1166  *   Pointer to @p buf or @p NULL in case suffix cannot be appended.
1167  */
1168 static char *
1169 mlx4_glue_path(char *buf, size_t size)
1170 {
1171         static const char *const bad[] = { "/", ".", "..", NULL };
1172         const char *path = RTE_EAL_PMD_PATH;
1173         size_t len = strlen(path);
1174         size_t off;
1175         int i;
1176
1177         while (len && path[len - 1] == '/')
1178                 --len;
1179         for (off = len; off && path[off - 1] != '/'; --off)
1180                 ;
1181         for (i = 0; bad[i]; ++i)
1182                 if (!strncmp(path + off, bad[i], (int)(len - off)))
1183                         goto error;
1184         i = snprintf(buf, size, "%.*s-glue", (int)len, path);
1185         if (i == -1 || (size_t)i >= size)
1186                 goto error;
1187         return buf;
1188 error:
1189         ERROR("unable to append \"-glue\" to last component of"
1190               " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
1191               " please re-configure DPDK");
1192         return NULL;
1193 }
1194
1195 /**
1196  * Initialization routine for run-time dependency on rdma-core.
1197  */
1198 static int
1199 mlx4_glue_init(void)
1200 {
1201         char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
1202         const char *path[] = {
1203                 /*
1204                  * A basic security check is necessary before trusting
1205                  * MLX4_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
1206                  */
1207                 (geteuid() == getuid() && getegid() == getgid() ?
1208                  getenv("MLX4_GLUE_PATH") : NULL),
1209                 /*
1210                  * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
1211                  * variant, otherwise let dlopen() look up libraries on its
1212                  * own.
1213                  */
1214                 (*RTE_EAL_PMD_PATH ?
1215                  mlx4_glue_path(glue_path, sizeof(glue_path)) : ""),
1216         };
1217         unsigned int i = 0;
1218         void *handle = NULL;
1219         void **sym;
1220         const char *dlmsg;
1221
1222         while (!handle && i != RTE_DIM(path)) {
1223                 const char *end;
1224                 size_t len;
1225                 int ret;
1226
1227                 if (!path[i]) {
1228                         ++i;
1229                         continue;
1230                 }
1231                 end = strpbrk(path[i], ":;");
1232                 if (!end)
1233                         end = path[i] + strlen(path[i]);
1234                 len = end - path[i];
1235                 ret = 0;
1236                 do {
1237                         char name[ret + 1];
1238
1239                         ret = snprintf(name, sizeof(name), "%.*s%s" MLX4_GLUE,
1240                                        (int)len, path[i],
1241                                        (!len || *(end - 1) == '/') ? "" : "/");
1242                         if (ret == -1)
1243                                 break;
1244                         if (sizeof(name) != (size_t)ret + 1)
1245                                 continue;
1246                         DEBUG("looking for rdma-core glue as \"%s\"", name);
1247                         handle = dlopen(name, RTLD_LAZY);
1248                         break;
1249                 } while (1);
1250                 path[i] = end + 1;
1251                 if (!*end)
1252                         ++i;
1253         }
1254         if (!handle) {
1255                 rte_errno = EINVAL;
1256                 dlmsg = dlerror();
1257                 if (dlmsg)
1258                         WARN("cannot load glue library: %s", dlmsg);
1259                 goto glue_error;
1260         }
1261         sym = dlsym(handle, "mlx4_glue");
1262         if (!sym || !*sym) {
1263                 rte_errno = EINVAL;
1264                 dlmsg = dlerror();
1265                 if (dlmsg)
1266                         ERROR("cannot resolve glue symbol: %s", dlmsg);
1267                 goto glue_error;
1268         }
1269         mlx4_glue = *sym;
1270         return 0;
1271 glue_error:
1272         if (handle)
1273                 dlclose(handle);
1274         WARN("cannot initialize PMD due to missing run-time"
1275              " dependency on rdma-core libraries (libibverbs,"
1276              " libmlx4)");
1277         return -rte_errno;
1278 }
1279
1280 #endif
1281
1282 /* Initialize driver log type. */
1283 RTE_LOG_REGISTER(mlx4_logtype, pmd.net.mlx4, NOTICE)
1284
1285 /**
1286  * Driver initialization routine.
1287  */
1288 RTE_INIT(rte_mlx4_pmd_init)
1289 {
1290         /*
1291          * MLX4_DEVICE_FATAL_CLEANUP tells ibv_destroy functions we
1292          * want to get success errno value in case of calling them
1293          * when the device was removed.
1294          */
1295         setenv("MLX4_DEVICE_FATAL_CLEANUP", "1", 1);
1296         /*
1297          * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
1298          * huge pages. Calling ibv_fork_init() during init allows
1299          * applications to use fork() safely for purposes other than
1300          * using this PMD, which is not supported in forked processes.
1301          */
1302         setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
1303 #ifdef RTE_IBVERBS_LINK_DLOPEN
1304         if (mlx4_glue_init())
1305                 return;
1306         MLX4_ASSERT(mlx4_glue);
1307 #endif
1308 #ifdef RTE_LIBRTE_MLX4_DEBUG
1309         /* Glue structure must not contain any NULL pointers. */
1310         {
1311                 unsigned int i;
1312
1313                 for (i = 0; i != sizeof(*mlx4_glue) / sizeof(void *); ++i)
1314                         MLX4_ASSERT(((const void *const *)mlx4_glue)[i]);
1315         }
1316 #endif
1317         if (strcmp(mlx4_glue->version, MLX4_GLUE_VERSION)) {
1318                 ERROR("rdma-core glue \"%s\" mismatch: \"%s\" is required",
1319                       mlx4_glue->version, MLX4_GLUE_VERSION);
1320                 return;
1321         }
1322         mlx4_glue->fork_init();
1323         rte_pci_register(&mlx4_driver);
1324 }
1325
1326 RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__);
1327 RTE_PMD_REGISTER_PCI_TABLE(net_mlx4, mlx4_pci_id_map);
1328 RTE_PMD_REGISTER_KMOD_DEP(net_mlx4,
1329         "* ib_uverbs & mlx4_en & mlx4_core & mlx4_ib");