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 int 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
mlx4_init_shared_data(void)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 *
mlx4_alloc_verbs_buf(size_t size,void * data)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
mlx4_free_verbs_buf(void * ptr,void * data __rte_unused)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
mlx4_proc_priv_init(struct rte_eth_dev * dev)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
mlx4_proc_priv_uninit(struct rte_eth_dev * dev)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
mlx4_dev_configure(struct rte_eth_dev * dev)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 /* Prepare internal flow rules. */
253 ret = mlx4_flow_sync(priv, &error);
254 if (ret) {
255 ERROR("cannot set up internal flow rules (code %d, \"%s\"),"
256 " flow error type %d, cause %p, message: %s",
257 -ret, strerror(-ret), error.type, error.cause,
258 error.message ? error.message : "(unspecified)");
259 goto exit;
260 }
261 ret = mlx4_intr_install(priv);
262 if (ret) {
263 ERROR("%p: interrupt handler installation failed",
264 (void *)dev);
265 goto exit;
266 }
267 ret = mlx4_proc_priv_init(dev);
268 if (ret) {
269 ERROR("%p: process private data allocation failed",
270 (void *)dev);
271 goto exit;
272 }
273 exit:
274 return ret;
275 }
276
277 /**
278 * DPDK callback to start the device.
279 *
280 * Simulate device start by initializing common RSS resources and attaching
281 * all configured flows.
282 *
283 * @param dev
284 * Pointer to Ethernet device structure.
285 *
286 * @return
287 * 0 on success, negative errno value otherwise and rte_errno is set.
288 */
289 static int
mlx4_dev_start(struct rte_eth_dev * dev)290 mlx4_dev_start(struct rte_eth_dev *dev)
291 {
292 struct mlx4_priv *priv = dev->data->dev_private;
293 struct rte_flow_error error;
294 int ret;
295
296 if (priv->started)
297 return 0;
298 DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
299 priv->started = 1;
300 ret = mlx4_rss_init(priv);
301 if (ret) {
302 ERROR("%p: cannot initialize RSS resources: %s",
303 (void *)dev, strerror(-ret));
304 goto err;
305 }
306 #ifdef RTE_LIBRTE_MLX4_DEBUG
307 mlx4_mr_dump_dev(dev);
308 #endif
309 ret = mlx4_rxq_intr_enable(priv);
310 if (ret) {
311 ERROR("%p: interrupt handler installation failed",
312 (void *)dev);
313 goto err;
314 }
315 ret = mlx4_flow_sync(priv, &error);
316 if (ret) {
317 ERROR("%p: cannot attach flow rules (code %d, \"%s\"),"
318 " flow error type %d, cause %p, message: %s",
319 (void *)dev,
320 -ret, strerror(-ret), error.type, error.cause,
321 error.message ? error.message : "(unspecified)");
322 goto err;
323 }
324 rte_wmb();
325 dev->tx_pkt_burst = mlx4_tx_burst;
326 dev->rx_pkt_burst = mlx4_rx_burst;
327 /* Enable datapath on secondary process. */
328 mlx4_mp_req_start_rxtx(dev);
329 return 0;
330 err:
331 mlx4_dev_stop(dev);
332 return ret;
333 }
334
335 /**
336 * DPDK callback to stop the device.
337 *
338 * Simulate device stop by detaching all configured flows.
339 *
340 * @param dev
341 * Pointer to Ethernet device structure.
342 */
343 static int
mlx4_dev_stop(struct rte_eth_dev * dev)344 mlx4_dev_stop(struct rte_eth_dev *dev)
345 {
346 struct mlx4_priv *priv = dev->data->dev_private;
347
348 if (!priv->started)
349 return 0;
350 DEBUG("%p: detaching flows from all RX queues", (void *)dev);
351 priv->started = 0;
352 dev->tx_pkt_burst = mlx4_tx_burst_removed;
353 dev->rx_pkt_burst = mlx4_rx_burst_removed;
354 rte_wmb();
355 /* Disable datapath on secondary process. */
356 mlx4_mp_req_stop_rxtx(dev);
357 mlx4_flow_sync(priv, NULL);
358 mlx4_rxq_intr_disable(priv);
359 mlx4_rss_deinit(priv);
360
361 return 0;
362 }
363
364 /**
365 * DPDK callback to close the device.
366 *
367 * Destroy all queues and objects, free memory.
368 *
369 * @param dev
370 * Pointer to Ethernet device structure.
371 */
372 static int
mlx4_dev_close(struct rte_eth_dev * dev)373 mlx4_dev_close(struct rte_eth_dev *dev)
374 {
375 struct mlx4_priv *priv = dev->data->dev_private;
376 unsigned int i;
377
378 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
379 return 0;
380 DEBUG("%p: closing device \"%s\"",
381 (void *)dev,
382 ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
383 dev->rx_pkt_burst = mlx4_rx_burst_removed;
384 dev->tx_pkt_burst = mlx4_tx_burst_removed;
385 rte_wmb();
386 /* Disable datapath on secondary process. */
387 mlx4_mp_req_stop_rxtx(dev);
388 mlx4_flow_clean(priv);
389 mlx4_rss_deinit(priv);
390 for (i = 0; i != dev->data->nb_rx_queues; ++i)
391 mlx4_rx_queue_release(dev->data->rx_queues[i]);
392 for (i = 0; i != dev->data->nb_tx_queues; ++i)
393 mlx4_tx_queue_release(dev->data->tx_queues[i]);
394 mlx4_proc_priv_uninit(dev);
395 mlx4_mr_release(dev);
396 if (priv->pd != NULL) {
397 MLX4_ASSERT(priv->ctx != NULL);
398 claim_zero(mlx4_glue->dealloc_pd(priv->pd));
399 claim_zero(mlx4_glue->close_device(priv->ctx));
400 } else
401 MLX4_ASSERT(priv->ctx == NULL);
402 mlx4_intr_uninstall(priv);
403 memset(priv, 0, sizeof(*priv));
404 /* mac_addrs must not be freed because part of dev_private */
405 dev->data->mac_addrs = NULL;
406 return 0;
407 }
408
409 static const struct eth_dev_ops mlx4_dev_ops = {
410 .dev_configure = mlx4_dev_configure,
411 .dev_start = mlx4_dev_start,
412 .dev_stop = mlx4_dev_stop,
413 .dev_set_link_down = mlx4_dev_set_link_down,
414 .dev_set_link_up = mlx4_dev_set_link_up,
415 .dev_close = mlx4_dev_close,
416 .link_update = mlx4_link_update,
417 .promiscuous_enable = mlx4_promiscuous_enable,
418 .promiscuous_disable = mlx4_promiscuous_disable,
419 .allmulticast_enable = mlx4_allmulticast_enable,
420 .allmulticast_disable = mlx4_allmulticast_disable,
421 .mac_addr_remove = mlx4_mac_addr_remove,
422 .mac_addr_add = mlx4_mac_addr_add,
423 .mac_addr_set = mlx4_mac_addr_set,
424 .set_mc_addr_list = mlx4_set_mc_addr_list,
425 .stats_get = mlx4_stats_get,
426 .stats_reset = mlx4_stats_reset,
427 .fw_version_get = mlx4_fw_version_get,
428 .dev_infos_get = mlx4_dev_infos_get,
429 .dev_supported_ptypes_get = mlx4_dev_supported_ptypes_get,
430 .vlan_filter_set = mlx4_vlan_filter_set,
431 .rx_queue_setup = mlx4_rx_queue_setup,
432 .tx_queue_setup = mlx4_tx_queue_setup,
433 .rx_queue_release = mlx4_rx_queue_release,
434 .tx_queue_release = mlx4_tx_queue_release,
435 .flow_ctrl_get = mlx4_flow_ctrl_get,
436 .flow_ctrl_set = mlx4_flow_ctrl_set,
437 .mtu_set = mlx4_mtu_set,
438 .filter_ctrl = mlx4_filter_ctrl,
439 .rx_queue_intr_enable = mlx4_rx_intr_enable,
440 .rx_queue_intr_disable = mlx4_rx_intr_disable,
441 .is_removed = mlx4_is_removed,
442 };
443
444 /* Available operations from secondary process. */
445 static const struct eth_dev_ops mlx4_dev_sec_ops = {
446 .stats_get = mlx4_stats_get,
447 .stats_reset = mlx4_stats_reset,
448 .fw_version_get = mlx4_fw_version_get,
449 .dev_infos_get = mlx4_dev_infos_get,
450 };
451
452 /**
453 * Get PCI information from struct ibv_device.
454 *
455 * @param device
456 * Pointer to Ethernet device structure.
457 * @param[out] pci_addr
458 * PCI bus address output buffer.
459 *
460 * @return
461 * 0 on success, negative errno value otherwise and rte_errno is set.
462 */
463 static int
mlx4_ibv_device_to_pci_addr(const struct ibv_device * device,struct rte_pci_addr * pci_addr)464 mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
465 struct rte_pci_addr *pci_addr)
466 {
467 FILE *file;
468 char line[32];
469 MKSTR(path, "%s/device/uevent", device->ibdev_path);
470
471 file = fopen(path, "rb");
472 if (file == NULL) {
473 rte_errno = errno;
474 return -rte_errno;
475 }
476 while (fgets(line, sizeof(line), file) == line) {
477 size_t len = strlen(line);
478 int ret;
479
480 /* Truncate long lines. */
481 if (len == (sizeof(line) - 1))
482 while (line[(len - 1)] != '\n') {
483 ret = fgetc(file);
484 if (ret == EOF)
485 break;
486 line[(len - 1)] = ret;
487 }
488 /* Extract information. */
489 if (sscanf(line,
490 "PCI_SLOT_NAME="
491 "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
492 &pci_addr->domain,
493 &pci_addr->bus,
494 &pci_addr->devid,
495 &pci_addr->function) == 4) {
496 break;
497 }
498 }
499 fclose(file);
500 return 0;
501 }
502
503 /**
504 * Verify and store value for device argument.
505 *
506 * @param[in] key
507 * Key argument to verify.
508 * @param[in] val
509 * Value associated with key.
510 * @param[in, out] conf
511 * Shared configuration data.
512 *
513 * @return
514 * 0 on success, negative errno value otherwise and rte_errno is set.
515 */
516 static int
mlx4_arg_parse(const char * key,const char * val,struct mlx4_conf * conf)517 mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf)
518 {
519 unsigned long tmp;
520
521 errno = 0;
522 tmp = strtoul(val, NULL, 0);
523 if (errno) {
524 rte_errno = errno;
525 WARN("%s: \"%s\" is not a valid integer", key, val);
526 return -rte_errno;
527 }
528 if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
529 uint32_t ports = rte_log2_u32(conf->ports.present + 1);
530
531 if (tmp >= ports) {
532 ERROR("port index %lu outside range [0,%" PRIu32 ")",
533 tmp, ports);
534 return -EINVAL;
535 }
536 if (!(conf->ports.present & (1 << tmp))) {
537 rte_errno = EINVAL;
538 ERROR("invalid port index %lu", tmp);
539 return -rte_errno;
540 }
541 conf->ports.enabled |= 1 << tmp;
542 } else if (strcmp(MLX4_MR_EXT_MEMSEG_EN_KVARG, key) == 0) {
543 conf->mr_ext_memseg_en = !!tmp;
544 } else {
545 rte_errno = EINVAL;
546 WARN("%s: unknown parameter", key);
547 return -rte_errno;
548 }
549 return 0;
550 }
551
552 /**
553 * Parse device parameters.
554 *
555 * @param devargs
556 * Device arguments structure.
557 *
558 * @return
559 * 0 on success, negative errno value otherwise and rte_errno is set.
560 */
561 static int
mlx4_args(struct rte_devargs * devargs,struct mlx4_conf * conf)562 mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf)
563 {
564 struct rte_kvargs *kvlist;
565 unsigned int arg_count;
566 int ret = 0;
567 int i;
568
569 if (devargs == NULL)
570 return 0;
571 kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params);
572 if (kvlist == NULL) {
573 rte_errno = EINVAL;
574 ERROR("failed to parse kvargs");
575 return -rte_errno;
576 }
577 /* Process parameters. */
578 for (i = 0; pmd_mlx4_init_params[i]; ++i) {
579 arg_count = rte_kvargs_count(kvlist, pmd_mlx4_init_params[i]);
580 while (arg_count-- > 0) {
581 ret = rte_kvargs_process(kvlist,
582 pmd_mlx4_init_params[i],
583 (int (*)(const char *,
584 const char *,
585 void *))
586 mlx4_arg_parse,
587 conf);
588 if (ret != 0)
589 goto free_kvlist;
590 }
591 }
592 free_kvlist:
593 rte_kvargs_free(kvlist);
594 return ret;
595 }
596
597 /**
598 * Interpret RSS capabilities reported by device.
599 *
600 * This function returns the set of usable Verbs RSS hash fields, kernel
601 * quirks taken into account.
602 *
603 * @param ctx
604 * Verbs context.
605 * @param pd
606 * Verbs protection domain.
607 * @param device_attr_ex
608 * Extended device attributes to interpret.
609 *
610 * @return
611 * Usable RSS hash fields mask in Verbs format.
612 */
613 static uint64_t
mlx4_hw_rss_sup(struct ibv_context * ctx,struct ibv_pd * pd,struct ibv_device_attr_ex * device_attr_ex)614 mlx4_hw_rss_sup(struct ibv_context *ctx, struct ibv_pd *pd,
615 struct ibv_device_attr_ex *device_attr_ex)
616 {
617 uint64_t hw_rss_sup = device_attr_ex->rss_caps.rx_hash_fields_mask;
618 struct ibv_cq *cq = NULL;
619 struct ibv_wq *wq = NULL;
620 struct ibv_rwq_ind_table *ind = NULL;
621 struct ibv_qp *qp = NULL;
622
623 if (!hw_rss_sup) {
624 WARN("no RSS capabilities reported; disabling support for UDP"
625 " RSS and inner VXLAN RSS");
626 return IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4 |
627 IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6 |
628 IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP;
629 }
630 if (!(hw_rss_sup & IBV_RX_HASH_INNER))
631 return hw_rss_sup;
632 /*
633 * Although reported as supported, missing code in some Linux
634 * versions (v4.15, v4.16) prevents the creation of hash QPs with
635 * inner capability.
636 *
637 * There is no choice but to attempt to instantiate a temporary RSS
638 * context in order to confirm its support.
639 */
640 cq = mlx4_glue->create_cq(ctx, 1, NULL, NULL, 0);
641 wq = cq ? mlx4_glue->create_wq
642 (ctx,
643 &(struct ibv_wq_init_attr){
644 .wq_type = IBV_WQT_RQ,
645 .max_wr = 1,
646 .max_sge = 1,
647 .pd = pd,
648 .cq = cq,
649 }) : NULL;
650 ind = wq ? mlx4_glue->create_rwq_ind_table
651 (ctx,
652 &(struct ibv_rwq_ind_table_init_attr){
653 .log_ind_tbl_size = 0,
654 .ind_tbl = &wq,
655 .comp_mask = 0,
656 }) : NULL;
657 qp = ind ? mlx4_glue->create_qp_ex
658 (ctx,
659 &(struct ibv_qp_init_attr_ex){
660 .comp_mask =
661 (IBV_QP_INIT_ATTR_PD |
662 IBV_QP_INIT_ATTR_RX_HASH |
663 IBV_QP_INIT_ATTR_IND_TABLE),
664 .qp_type = IBV_QPT_RAW_PACKET,
665 .pd = pd,
666 .rwq_ind_tbl = ind,
667 .rx_hash_conf = {
668 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
669 .rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE,
670 .rx_hash_key = mlx4_rss_hash_key_default,
671 .rx_hash_fields_mask = hw_rss_sup,
672 },
673 }) : NULL;
674 if (!qp) {
675 WARN("disabling unusable inner RSS capability due to kernel"
676 " quirk");
677 hw_rss_sup &= ~IBV_RX_HASH_INNER;
678 } else {
679 claim_zero(mlx4_glue->destroy_qp(qp));
680 }
681 if (ind)
682 claim_zero(mlx4_glue->destroy_rwq_ind_table(ind));
683 if (wq)
684 claim_zero(mlx4_glue->destroy_wq(wq));
685 if (cq)
686 claim_zero(mlx4_glue->destroy_cq(cq));
687 return hw_rss_sup;
688 }
689
690 static struct rte_pci_driver mlx4_driver;
691
692 /**
693 * PMD global initialization.
694 *
695 * Independent from individual device, this function initializes global
696 * per-PMD data structures distinguishing primary and secondary processes.
697 * Hence, each initialization is called once per a process.
698 *
699 * @return
700 * 0 on success, a negative errno value otherwise and rte_errno is set.
701 */
702 static int
mlx4_init_once(void)703 mlx4_init_once(void)
704 {
705 struct mlx4_shared_data *sd;
706 struct mlx4_local_data *ld = &mlx4_local_data;
707 int ret = 0;
708
709 if (mlx4_init_shared_data())
710 return -rte_errno;
711 sd = mlx4_shared_data;
712 MLX4_ASSERT(sd);
713 rte_spinlock_lock(&sd->lock);
714 switch (rte_eal_process_type()) {
715 case RTE_PROC_PRIMARY:
716 if (sd->init_done)
717 break;
718 LIST_INIT(&sd->mem_event_cb_list);
719 rte_rwlock_init(&sd->mem_event_rwlock);
720 rte_mem_event_callback_register("MLX4_MEM_EVENT_CB",
721 mlx4_mr_mem_event_cb, NULL);
722 ret = mlx4_mp_init_primary();
723 if (ret)
724 goto out;
725 sd->init_done = 1;
726 break;
727 case RTE_PROC_SECONDARY:
728 if (ld->init_done)
729 break;
730 ret = mlx4_mp_init_secondary();
731 if (ret)
732 goto out;
733 ++sd->secondary_cnt;
734 ld->init_done = 1;
735 break;
736 default:
737 break;
738 }
739 out:
740 rte_spinlock_unlock(&sd->lock);
741 return ret;
742 }
743
744 /**
745 * DPDK callback to register a PCI device.
746 *
747 * This function creates an Ethernet device for each port of a given
748 * PCI device.
749 *
750 * @param[in] pci_drv
751 * PCI driver structure (mlx4_driver).
752 * @param[in] pci_dev
753 * PCI device information.
754 *
755 * @return
756 * 0 on success, negative errno value otherwise and rte_errno is set.
757 */
758 static int
mlx4_pci_probe(struct rte_pci_driver * pci_drv,struct rte_pci_device * pci_dev)759 mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
760 {
761 struct ibv_device **list;
762 struct ibv_device *ibv_dev;
763 int err = 0;
764 struct ibv_context *attr_ctx = NULL;
765 struct ibv_device_attr device_attr;
766 struct ibv_device_attr_ex device_attr_ex;
767 struct mlx4_conf conf = {
768 .ports.present = 0,
769 .mr_ext_memseg_en = 1,
770 };
771 unsigned int vf;
772 int i;
773 char ifname[IF_NAMESIZE];
774
775 (void)pci_drv;
776 err = mlx4_init_once();
777 if (err) {
778 ERROR("unable to init PMD global data: %s",
779 strerror(rte_errno));
780 return -rte_errno;
781 }
782 MLX4_ASSERT(pci_drv == &mlx4_driver);
783 list = mlx4_glue->get_device_list(&i);
784 if (list == NULL) {
785 rte_errno = errno;
786 MLX4_ASSERT(rte_errno);
787 if (rte_errno == ENOSYS)
788 ERROR("cannot list devices, is ib_uverbs loaded?");
789 return -rte_errno;
790 }
791 MLX4_ASSERT(i >= 0);
792 /*
793 * For each listed device, check related sysfs entry against
794 * the provided PCI ID.
795 */
796 while (i != 0) {
797 struct rte_pci_addr pci_addr;
798
799 --i;
800 DEBUG("checking device \"%s\"", list[i]->name);
801 if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
802 continue;
803 if ((pci_dev->addr.domain != pci_addr.domain) ||
804 (pci_dev->addr.bus != pci_addr.bus) ||
805 (pci_dev->addr.devid != pci_addr.devid) ||
806 (pci_dev->addr.function != pci_addr.function))
807 continue;
808 vf = (pci_dev->id.device_id ==
809 PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
810 INFO("PCI information matches, using device \"%s\" (VF: %s)",
811 list[i]->name, (vf ? "true" : "false"));
812 attr_ctx = mlx4_glue->open_device(list[i]);
813 err = errno;
814 break;
815 }
816 if (attr_ctx == NULL) {
817 mlx4_glue->free_device_list(list);
818 switch (err) {
819 case 0:
820 rte_errno = ENODEV;
821 ERROR("cannot access device, is mlx4_ib loaded?");
822 return -rte_errno;
823 case EINVAL:
824 rte_errno = EINVAL;
825 ERROR("cannot use device, are drivers up to date?");
826 return -rte_errno;
827 }
828 MLX4_ASSERT(err > 0);
829 rte_errno = err;
830 return -rte_errno;
831 }
832 ibv_dev = list[i];
833 DEBUG("device opened");
834 if (mlx4_glue->query_device(attr_ctx, &device_attr)) {
835 err = ENODEV;
836 goto error;
837 }
838 INFO("%u port(s) detected", device_attr.phys_port_cnt);
839 conf.ports.present |= (UINT64_C(1) << device_attr.phys_port_cnt) - 1;
840 if (mlx4_args(pci_dev->device.devargs, &conf)) {
841 ERROR("failed to process device arguments");
842 err = EINVAL;
843 goto error;
844 }
845 /* Use all ports when none are defined */
846 if (!conf.ports.enabled)
847 conf.ports.enabled = conf.ports.present;
848 /* Retrieve extended device attributes. */
849 if (mlx4_glue->query_device_ex(attr_ctx, NULL, &device_attr_ex)) {
850 err = ENODEV;
851 goto error;
852 }
853 MLX4_ASSERT(device_attr.max_sge >= MLX4_MAX_SGE);
854 for (i = 0; i < device_attr.phys_port_cnt; i++) {
855 uint32_t port = i + 1; /* ports are indexed from one */
856 struct ibv_context *ctx = NULL;
857 struct ibv_port_attr port_attr;
858 struct ibv_pd *pd = NULL;
859 struct mlx4_priv *priv = NULL;
860 struct rte_eth_dev *eth_dev = NULL;
861 struct rte_ether_addr mac;
862 char name[RTE_ETH_NAME_MAX_LEN];
863
864 /* If port is not enabled, skip. */
865 if (!(conf.ports.enabled & (1 << i)))
866 continue;
867 DEBUG("using port %u", port);
868 ctx = mlx4_glue->open_device(ibv_dev);
869 if (ctx == NULL) {
870 err = ENODEV;
871 goto port_error;
872 }
873 snprintf(name, sizeof(name), "%s port %u",
874 mlx4_glue->get_device_name(ibv_dev), port);
875 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
876 eth_dev = rte_eth_dev_attach_secondary(name);
877 if (eth_dev == NULL) {
878 ERROR("can not attach rte ethdev");
879 rte_errno = ENOMEM;
880 err = rte_errno;
881 goto error;
882 }
883 priv = eth_dev->data->dev_private;
884 if (!priv->verbs_alloc_ctx.enabled) {
885 ERROR("secondary process is not supported"
886 " due to lack of external allocator"
887 " from Verbs");
888 rte_errno = ENOTSUP;
889 err = rte_errno;
890 goto error;
891 }
892 eth_dev->device = &pci_dev->device;
893 eth_dev->dev_ops = &mlx4_dev_sec_ops;
894 err = mlx4_proc_priv_init(eth_dev);
895 if (err)
896 goto error;
897 /* Receive command fd from primary process. */
898 err = mlx4_mp_req_verbs_cmd_fd(eth_dev);
899 if (err < 0) {
900 err = rte_errno;
901 goto error;
902 }
903 /* Remap UAR for Tx queues. */
904 err = mlx4_tx_uar_init_secondary(eth_dev, err);
905 if (err) {
906 err = rte_errno;
907 goto error;
908 }
909 /*
910 * Ethdev pointer is still required as input since
911 * the primary device is not accessible from the
912 * secondary process.
913 */
914 eth_dev->tx_pkt_burst = mlx4_tx_burst;
915 eth_dev->rx_pkt_burst = mlx4_rx_burst;
916 claim_zero(mlx4_glue->close_device(ctx));
917 rte_eth_copy_pci_info(eth_dev, pci_dev);
918 rte_eth_dev_probing_finish(eth_dev);
919 continue;
920 }
921 /* Check port status. */
922 err = mlx4_glue->query_port(ctx, port, &port_attr);
923 if (err) {
924 err = ENODEV;
925 ERROR("port query failed: %s", strerror(err));
926 goto port_error;
927 }
928 if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
929 err = ENOTSUP;
930 ERROR("port %d is not configured in Ethernet mode",
931 port);
932 goto port_error;
933 }
934 if (port_attr.state != IBV_PORT_ACTIVE)
935 DEBUG("port %d is not active: \"%s\" (%d)",
936 port, mlx4_glue->port_state_str(port_attr.state),
937 port_attr.state);
938 /* Make asynchronous FD non-blocking to handle interrupts. */
939 err = mlx4_fd_set_non_blocking(ctx->async_fd);
940 if (err) {
941 ERROR("cannot make asynchronous FD non-blocking: %s",
942 strerror(err));
943 goto port_error;
944 }
945 /* Allocate protection domain. */
946 pd = mlx4_glue->alloc_pd(ctx);
947 if (pd == NULL) {
948 err = ENOMEM;
949 ERROR("PD allocation failure");
950 goto port_error;
951 }
952 /* from rte_ethdev.c */
953 priv = rte_zmalloc("ethdev private structure",
954 sizeof(*priv),
955 RTE_CACHE_LINE_SIZE);
956 if (priv == NULL) {
957 err = ENOMEM;
958 ERROR("priv allocation failure");
959 goto port_error;
960 }
961 priv->ctx = ctx;
962 priv->device_attr = device_attr;
963 priv->port = port;
964 priv->pd = pd;
965 priv->mtu = RTE_ETHER_MTU;
966 priv->vf = vf;
967 priv->hw_csum = !!(device_attr.device_cap_flags &
968 IBV_DEVICE_RAW_IP_CSUM);
969 DEBUG("checksum offloading is %ssupported",
970 (priv->hw_csum ? "" : "not "));
971 /* Only ConnectX-3 Pro supports tunneling. */
972 priv->hw_csum_l2tun =
973 priv->hw_csum &&
974 (device_attr.vendor_part_id ==
975 PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO);
976 DEBUG("L2 tunnel checksum offloads are %ssupported",
977 priv->hw_csum_l2tun ? "" : "not ");
978 priv->hw_rss_sup = mlx4_hw_rss_sup(priv->ctx, priv->pd,
979 &device_attr_ex);
980 DEBUG("supported RSS hash fields mask: %016" PRIx64,
981 priv->hw_rss_sup);
982 priv->hw_rss_max_qps =
983 device_attr_ex.rss_caps.max_rwq_indirection_table_size;
984 DEBUG("MAX RSS queues %d", priv->hw_rss_max_qps);
985 priv->hw_fcs_strip = !!(device_attr_ex.raw_packet_caps &
986 IBV_RAW_PACKET_CAP_SCATTER_FCS);
987 DEBUG("FCS stripping toggling is %ssupported",
988 priv->hw_fcs_strip ? "" : "not ");
989 priv->tso =
990 ((device_attr_ex.tso_caps.max_tso > 0) &&
991 (device_attr_ex.tso_caps.supported_qpts &
992 (1 << IBV_QPT_RAW_PACKET)));
993 if (priv->tso)
994 priv->tso_max_payload_sz =
995 device_attr_ex.tso_caps.max_tso;
996 DEBUG("TSO is %ssupported",
997 priv->tso ? "" : "not ");
998 priv->mr_ext_memseg_en = conf.mr_ext_memseg_en;
999 /* Configure the first MAC address by default. */
1000 err = mlx4_get_mac(priv, &mac.addr_bytes);
1001 if (err) {
1002 ERROR("cannot get MAC address, is mlx4_en loaded?"
1003 " (error: %s)", strerror(err));
1004 goto port_error;
1005 }
1006 INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
1007 priv->port,
1008 mac.addr_bytes[0], mac.addr_bytes[1],
1009 mac.addr_bytes[2], mac.addr_bytes[3],
1010 mac.addr_bytes[4], mac.addr_bytes[5]);
1011 /* Register MAC address. */
1012 priv->mac[0] = mac;
1013
1014 if (mlx4_get_ifname(priv, &ifname) == 0) {
1015 DEBUG("port %u ifname is \"%s\"",
1016 priv->port, ifname);
1017 priv->if_index = if_nametoindex(ifname);
1018 } else {
1019 DEBUG("port %u ifname is unknown", priv->port);
1020 }
1021
1022 /* Get actual MTU if possible. */
1023 mlx4_mtu_get(priv, &priv->mtu);
1024 DEBUG("port %u MTU is %u", priv->port, priv->mtu);
1025 eth_dev = rte_eth_dev_allocate(name);
1026 if (eth_dev == NULL) {
1027 err = ENOMEM;
1028 ERROR("can not allocate rte ethdev");
1029 goto port_error;
1030 }
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 eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1036 /* Initialize local interrupt handle for current port. */
1037 memset(&priv->intr_handle, 0, sizeof(struct rte_intr_handle));
1038 priv->intr_handle.fd = -1;
1039 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1040 /*
1041 * Override ethdev interrupt handle pointer with private
1042 * handle instead of that of the parent PCI device used by
1043 * default. This prevents it from being shared between all
1044 * ports of the same PCI device since each of them is
1045 * associated its own Verbs context.
1046 *
1047 * Rx interrupts in particular require this as the PMD has
1048 * no control over the registration of queue interrupts
1049 * besides setting up eth_dev->intr_handle, the rest is
1050 * handled by rte_intr_rx_ctl().
1051 */
1052 eth_dev->intr_handle = &priv->intr_handle;
1053 priv->dev_data = eth_dev->data;
1054 eth_dev->dev_ops = &mlx4_dev_ops;
1055 #ifdef HAVE_IBV_MLX4_BUF_ALLOCATORS
1056 /* Hint libmlx4 to use PMD allocator for data plane resources */
1057 err = mlx4_glue->dv_set_context_attr
1058 (ctx, MLX4DV_SET_CTX_ATTR_BUF_ALLOCATORS,
1059 (void *)((uintptr_t)&(struct mlx4dv_ctx_allocators){
1060 .alloc = &mlx4_alloc_verbs_buf,
1061 .free = &mlx4_free_verbs_buf,
1062 .data = priv,
1063 }));
1064 if (err)
1065 WARN("Verbs external allocator is not supported");
1066 else
1067 priv->verbs_alloc_ctx.enabled = 1;
1068 #endif
1069 /* Bring Ethernet device up. */
1070 DEBUG("forcing Ethernet interface up");
1071 mlx4_dev_set_link_up(eth_dev);
1072 /* Update link status once if waiting for LSC. */
1073 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
1074 mlx4_link_update(eth_dev, 0);
1075 /*
1076 * Once the device is added to the list of memory event
1077 * callback, its global MR cache table cannot be expanded
1078 * on the fly because of deadlock. If it overflows, lookup
1079 * should be done by searching MR list linearly, which is slow.
1080 */
1081 err = mlx4_mr_btree_init(&priv->mr.cache,
1082 MLX4_MR_BTREE_CACHE_N * 2,
1083 eth_dev->device->numa_node);
1084 if (err) {
1085 /* rte_errno is already set. */
1086 goto port_error;
1087 }
1088 /* Add device to memory callback list. */
1089 rte_rwlock_write_lock(&mlx4_shared_data->mem_event_rwlock);
1090 LIST_INSERT_HEAD(&mlx4_shared_data->mem_event_cb_list,
1091 priv, mem_event_cb);
1092 rte_rwlock_write_unlock(&mlx4_shared_data->mem_event_rwlock);
1093 rte_eth_dev_probing_finish(eth_dev);
1094 continue;
1095 port_error:
1096 rte_free(priv);
1097 if (eth_dev != NULL)
1098 eth_dev->data->dev_private = NULL;
1099 if (pd)
1100 claim_zero(mlx4_glue->dealloc_pd(pd));
1101 if (ctx)
1102 claim_zero(mlx4_glue->close_device(ctx));
1103 if (eth_dev != NULL) {
1104 /* mac_addrs must not be freed because part of dev_private */
1105 eth_dev->data->mac_addrs = NULL;
1106 rte_eth_dev_release_port(eth_dev);
1107 }
1108 break;
1109 }
1110 /*
1111 * XXX if something went wrong in the loop above, there is a resource
1112 * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
1113 * long as the dpdk does not provide a way to deallocate a ethdev and a
1114 * way to enumerate the registered ethdevs to free the previous ones.
1115 */
1116 error:
1117 if (attr_ctx)
1118 claim_zero(mlx4_glue->close_device(attr_ctx));
1119 if (list)
1120 mlx4_glue->free_device_list(list);
1121 if (err)
1122 rte_errno = err;
1123 return -err;
1124 }
1125
1126 static const struct rte_pci_id mlx4_pci_id_map[] = {
1127 {
1128 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1129 PCI_DEVICE_ID_MELLANOX_CONNECTX3)
1130 },
1131 {
1132 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1133 PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO)
1134 },
1135 {
1136 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1137 PCI_DEVICE_ID_MELLANOX_CONNECTX3VF)
1138 },
1139 {
1140 .vendor_id = 0
1141 }
1142 };
1143
1144 static struct rte_pci_driver mlx4_driver = {
1145 .driver = {
1146 .name = MLX4_DRIVER_NAME
1147 },
1148 .id_table = mlx4_pci_id_map,
1149 .probe = mlx4_pci_probe,
1150 .drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_INTR_RMV,
1151 };
1152
1153 #ifdef RTE_IBVERBS_LINK_DLOPEN
1154
1155 /**
1156 * Suffix RTE_EAL_PMD_PATH with "-glue".
1157 *
1158 * This function performs a sanity check on RTE_EAL_PMD_PATH before
1159 * suffixing its last component.
1160 *
1161 * @param buf[out]
1162 * Output buffer, should be large enough otherwise NULL is returned.
1163 * @param size
1164 * Size of @p out.
1165 *
1166 * @return
1167 * Pointer to @p buf or @p NULL in case suffix cannot be appended.
1168 */
1169 static char *
mlx4_glue_path(char * buf,size_t size)1170 mlx4_glue_path(char *buf, size_t size)
1171 {
1172 static const char *const bad[] = { "/", ".", "..", NULL };
1173 const char *path = RTE_EAL_PMD_PATH;
1174 size_t len = strlen(path);
1175 size_t off;
1176 int i;
1177
1178 while (len && path[len - 1] == '/')
1179 --len;
1180 for (off = len; off && path[off - 1] != '/'; --off)
1181 ;
1182 for (i = 0; bad[i]; ++i)
1183 if (!strncmp(path + off, bad[i], (int)(len - off)))
1184 goto error;
1185 i = snprintf(buf, size, "%.*s-glue", (int)len, path);
1186 if (i == -1 || (size_t)i >= size)
1187 goto error;
1188 return buf;
1189 error:
1190 ERROR("unable to append \"-glue\" to last component of"
1191 " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
1192 " please re-configure DPDK");
1193 return NULL;
1194 }
1195
1196 /**
1197 * Initialization routine for run-time dependency on rdma-core.
1198 */
1199 static int
mlx4_glue_init(void)1200 mlx4_glue_init(void)
1201 {
1202 char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
1203 const char *path[] = {
1204 /*
1205 * A basic security check is necessary before trusting
1206 * MLX4_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
1207 */
1208 (geteuid() == getuid() && getegid() == getgid() ?
1209 getenv("MLX4_GLUE_PATH") : NULL),
1210 /*
1211 * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
1212 * variant, otherwise let dlopen() look up libraries on its
1213 * own.
1214 */
1215 (*RTE_EAL_PMD_PATH ?
1216 mlx4_glue_path(glue_path, sizeof(glue_path)) : ""),
1217 };
1218 unsigned int i = 0;
1219 void *handle = NULL;
1220 void **sym;
1221 const char *dlmsg;
1222
1223 while (!handle && i != RTE_DIM(path)) {
1224 const char *end;
1225 size_t len;
1226 int ret;
1227
1228 if (!path[i]) {
1229 ++i;
1230 continue;
1231 }
1232 end = strpbrk(path[i], ":;");
1233 if (!end)
1234 end = path[i] + strlen(path[i]);
1235 len = end - path[i];
1236 ret = 0;
1237 do {
1238 char name[ret + 1];
1239
1240 ret = snprintf(name, sizeof(name), "%.*s%s" MLX4_GLUE,
1241 (int)len, path[i],
1242 (!len || *(end - 1) == '/') ? "" : "/");
1243 if (ret == -1)
1244 break;
1245 if (sizeof(name) != (size_t)ret + 1)
1246 continue;
1247 DEBUG("looking for rdma-core glue as \"%s\"", name);
1248 handle = dlopen(name, RTLD_LAZY);
1249 break;
1250 } while (1);
1251 path[i] = end + 1;
1252 if (!*end)
1253 ++i;
1254 }
1255 if (!handle) {
1256 rte_errno = EINVAL;
1257 dlmsg = dlerror();
1258 if (dlmsg)
1259 WARN("cannot load glue library: %s", dlmsg);
1260 goto glue_error;
1261 }
1262 sym = dlsym(handle, "mlx4_glue");
1263 if (!sym || !*sym) {
1264 rte_errno = EINVAL;
1265 dlmsg = dlerror();
1266 if (dlmsg)
1267 ERROR("cannot resolve glue symbol: %s", dlmsg);
1268 goto glue_error;
1269 }
1270 mlx4_glue = *sym;
1271 return 0;
1272 glue_error:
1273 if (handle)
1274 dlclose(handle);
1275 WARN("cannot initialize PMD due to missing run-time"
1276 " dependency on rdma-core libraries (libibverbs,"
1277 " libmlx4)");
1278 return -rte_errno;
1279 }
1280
1281 #endif
1282
1283 /* Initialize driver log type. */
1284 RTE_LOG_REGISTER(mlx4_logtype, pmd.net.mlx4, NOTICE)
1285
1286 /**
1287 * Driver initialization routine.
1288 */
RTE_INIT(rte_mlx4_pmd_init)1289 RTE_INIT(rte_mlx4_pmd_init)
1290 {
1291 /*
1292 * MLX4_DEVICE_FATAL_CLEANUP tells ibv_destroy functions we
1293 * want to get success errno value in case of calling them
1294 * when the device was removed.
1295 */
1296 setenv("MLX4_DEVICE_FATAL_CLEANUP", "1", 1);
1297 /*
1298 * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
1299 * huge pages. Calling ibv_fork_init() during init allows
1300 * applications to use fork() safely for purposes other than
1301 * using this PMD, which is not supported in forked processes.
1302 */
1303 setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
1304 #ifdef RTE_IBVERBS_LINK_DLOPEN
1305 if (mlx4_glue_init())
1306 return;
1307 MLX4_ASSERT(mlx4_glue);
1308 #endif
1309 #ifdef RTE_LIBRTE_MLX4_DEBUG
1310 /* Glue structure must not contain any NULL pointers. */
1311 {
1312 unsigned int i;
1313
1314 for (i = 0; i != sizeof(*mlx4_glue) / sizeof(void *); ++i)
1315 MLX4_ASSERT(((const void *const *)mlx4_glue)[i]);
1316 }
1317 #endif
1318 if (strcmp(mlx4_glue->version, MLX4_GLUE_VERSION)) {
1319 ERROR("rdma-core glue \"%s\" mismatch: \"%s\" is required",
1320 mlx4_glue->version, MLX4_GLUE_VERSION);
1321 return;
1322 }
1323 mlx4_glue->fork_init();
1324 rte_pci_register(&mlx4_driver);
1325 }
1326
1327 RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__);
1328 RTE_PMD_REGISTER_PCI_TABLE(net_mlx4, mlx4_pci_id_map);
1329 RTE_PMD_REGISTER_KMOD_DEP(net_mlx4,
1330 "* ib_uverbs & mlx4_en & mlx4_core & mlx4_ib");
1331