1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2012 6WIND S.A.
3 * Copyright 2012 Mellanox Technologies, Ltd
8 * mlx4 driver initialization.
20 #ifdef RTE_IBVERBS_LINK_DLOPEN
24 /* Verbs headers do not support -pedantic. */
26 #pragma GCC diagnostic ignored "-Wpedantic"
28 #include <infiniband/verbs.h>
30 #pragma GCC diagnostic error "-Wpedantic"
33 #include <rte_common.h>
35 #include <rte_errno.h>
36 #include <rte_ethdev_driver.h>
37 #include <rte_ethdev_pci.h>
38 #include <rte_ether.h>
40 #include <rte_interrupts.h>
41 #include <rte_kvargs.h>
42 #include <rte_malloc.h>
46 #include "mlx4_glue.h"
47 #include "mlx4_flow.h"
49 #include "mlx4_rxtx.h"
50 #include "mlx4_utils.h"
53 const struct mlx4_glue *mlx4_glue;
56 static const char *MZ_MLX4_PMD_SHARED_DATA = "mlx4_pmd_shared_data";
58 /* Shared memory between primary and secondary processes. */
59 struct mlx4_shared_data *mlx4_shared_data;
61 /* Spinlock for mlx4_shared_data allocation. */
62 static rte_spinlock_t mlx4_shared_data_lock = RTE_SPINLOCK_INITIALIZER;
64 /* Process local data for secondary processes. */
65 static struct mlx4_local_data mlx4_local_data;
67 /** Configuration structure for device arguments. */
70 uint32_t present; /**< Bit-field for existing ports. */
71 uint32_t enabled; /**< Bit-field for user-enabled ports. */
74 /** Whether memseg should be extended for MR creation. */
77 /* Available parameters list. */
78 const char *pmd_mlx4_init_params[] = {
80 MLX4_MR_EXT_MEMSEG_EN_KVARG,
84 static int mlx4_dev_stop(struct rte_eth_dev *dev);
87 * Initialize shared data between primary and secondary process.
89 * A memzone is reserved by primary process and secondary processes attach to
93 * 0 on success, a negative errno value otherwise and rte_errno is set.
96 mlx4_init_shared_data(void)
98 const struct rte_memzone *mz;
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),
109 ERROR("Cannot allocate mlx4 shared data\n");
113 mlx4_shared_data = mz->addr;
114 memset(mlx4_shared_data, 0, sizeof(*mlx4_shared_data));
115 rte_spinlock_init(&mlx4_shared_data->lock);
117 /* Lookup allocated shared memory. */
118 mz = rte_memzone_lookup(MZ_MLX4_PMD_SHARED_DATA);
120 ERROR("Cannot attach mlx4 shared data\n");
124 mlx4_shared_data = mz->addr;
125 memset(&mlx4_local_data, 0, sizeof(mlx4_local_data));
129 rte_spinlock_unlock(&mlx4_shared_data_lock);
133 #ifdef HAVE_IBV_MLX4_BUF_ALLOCATORS
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)).
141 * The size in bytes of the memory to allocate.
143 * A pointer to the callback data.
146 * Allocated buffer, NULL otherwise and rte_errno is set.
149 mlx4_alloc_verbs_buf(size_t size, void *data)
151 struct mlx4_priv *priv = data;
153 size_t alignment = sysconf(_SC_PAGESIZE);
154 unsigned int socket = SOCKET_ID_ANY;
156 if (priv->verbs_alloc_ctx.type == MLX4_VERBS_ALLOC_TYPE_TX_QUEUE) {
157 const struct txq *txq = priv->verbs_alloc_ctx.obj;
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;
164 socket = rxq->socket;
166 MLX4_ASSERT(data != NULL);
167 ret = rte_malloc_socket(__func__, size, alignment, socket);
174 * Verbs callback to free a memory.
177 * A pointer to the memory to free.
179 * A pointer to the callback data.
182 mlx4_free_verbs_buf(void *ptr, void *data __rte_unused)
184 MLX4_ASSERT(data != NULL);
190 * Initialize process private data structure.
193 * Pointer to Ethernet device structure.
196 * 0 on success, a negative errno value otherwise and rte_errno is set.
199 mlx4_proc_priv_init(struct rte_eth_dev *dev)
201 struct mlx4_proc_priv *ppriv;
205 * UAR register table follows the process private structure. BlueFlame
206 * registers for Tx queues are stored in the table.
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);
216 ppriv->uar_table_sz = ppriv_size;
217 dev->process_private = ppriv;
222 * Un-initialize process private data structure.
225 * Pointer to Ethernet device structure.
228 mlx4_proc_priv_uninit(struct rte_eth_dev *dev)
230 if (!dev->process_private)
232 rte_free(dev->process_private);
233 dev->process_private = NULL;
237 * DPDK callback for Ethernet device configuration.
240 * Pointer to Ethernet device structure.
243 * 0 on success, negative errno value otherwise and rte_errno is set.
246 mlx4_dev_configure(struct rte_eth_dev *dev)
248 struct mlx4_priv *priv = dev->data->dev_private;
249 struct rte_flow_error error;
252 /* Prepare internal flow rules. */
253 ret = mlx4_flow_sync(priv, &error);
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)");
261 ret = mlx4_intr_install(priv);
263 ERROR("%p: interrupt handler installation failed",
267 ret = mlx4_proc_priv_init(dev);
269 ERROR("%p: process private data allocation failed",
278 * DPDK callback to start the device.
280 * Simulate device start by initializing common RSS resources and attaching
281 * all configured flows.
284 * Pointer to Ethernet device structure.
287 * 0 on success, negative errno value otherwise and rte_errno is set.
290 mlx4_dev_start(struct rte_eth_dev *dev)
292 struct mlx4_priv *priv = dev->data->dev_private;
293 struct rte_flow_error error;
298 DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
300 ret = mlx4_rss_init(priv);
302 ERROR("%p: cannot initialize RSS resources: %s",
303 (void *)dev, strerror(-ret));
306 #ifdef RTE_LIBRTE_MLX4_DEBUG
307 mlx4_mr_dump_dev(dev);
309 ret = mlx4_rxq_intr_enable(priv);
311 ERROR("%p: interrupt handler installation failed",
315 ret = mlx4_flow_sync(priv, &error);
317 ERROR("%p: cannot attach flow rules (code %d, \"%s\"),"
318 " flow error type %d, cause %p, message: %s",
320 -ret, strerror(-ret), error.type, error.cause,
321 error.message ? error.message : "(unspecified)");
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);
336 * DPDK callback to stop the device.
338 * Simulate device stop by detaching all configured flows.
341 * Pointer to Ethernet device structure.
344 mlx4_dev_stop(struct rte_eth_dev *dev)
346 struct mlx4_priv *priv = dev->data->dev_private;
350 DEBUG("%p: detaching flows from all RX queues", (void *)dev);
352 dev->tx_pkt_burst = mlx4_tx_burst_removed;
353 dev->rx_pkt_burst = mlx4_rx_burst_removed;
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);
365 * DPDK callback to close the device.
367 * Destroy all queues and objects, free memory.
370 * Pointer to Ethernet device structure.
373 mlx4_dev_close(struct rte_eth_dev *dev)
375 struct mlx4_priv *priv = dev->data->dev_private;
378 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
380 DEBUG("%p: closing device \"%s\"",
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;
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));
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;
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,
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,
453 * Get PCI information from struct ibv_device.
456 * Pointer to Ethernet device structure.
457 * @param[out] pci_addr
458 * PCI bus address output buffer.
461 * 0 on success, negative errno value otherwise and rte_errno is set.
464 mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
465 struct rte_pci_addr *pci_addr)
469 MKSTR(path, "%s/device/uevent", device->ibdev_path);
471 file = fopen(path, "rb");
476 while (fgets(line, sizeof(line), file) == line) {
477 size_t len = strlen(line);
480 /* Truncate long lines. */
481 if (len == (sizeof(line) - 1))
482 while (line[(len - 1)] != '\n') {
486 line[(len - 1)] = ret;
488 /* Extract information. */
491 "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
495 &pci_addr->function) == 4) {
504 * Verify and store value for device argument.
507 * Key argument to verify.
509 * Value associated with key.
510 * @param[in, out] conf
511 * Shared configuration data.
514 * 0 on success, negative errno value otherwise and rte_errno is set.
517 mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf)
522 tmp = strtoul(val, NULL, 0);
525 WARN("%s: \"%s\" is not a valid integer", key, val);
528 if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
529 uint32_t ports = rte_log2_u32(conf->ports.present + 1);
532 ERROR("port index %lu outside range [0,%" PRIu32 ")",
536 if (!(conf->ports.present & (1 << tmp))) {
538 ERROR("invalid port index %lu", tmp);
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;
546 WARN("%s: unknown parameter", key);
553 * Parse device parameters.
556 * Device arguments structure.
559 * 0 on success, negative errno value otherwise and rte_errno is set.
562 mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf)
564 struct rte_kvargs *kvlist;
565 unsigned int arg_count;
571 kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params);
572 if (kvlist == NULL) {
574 ERROR("failed to parse kvargs");
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 *,
593 rte_kvargs_free(kvlist);
598 * Interpret RSS capabilities reported by device.
600 * This function returns the set of usable Verbs RSS hash fields, kernel
601 * quirks taken into account.
606 * Verbs protection domain.
607 * @param device_attr_ex
608 * Extended device attributes to interpret.
611 * Usable RSS hash fields mask in Verbs format.
614 mlx4_hw_rss_sup(struct ibv_context *ctx, struct ibv_pd *pd,
615 struct ibv_device_attr_ex *device_attr_ex)
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;
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;
630 if (!(hw_rss_sup & IBV_RX_HASH_INNER))
633 * Although reported as supported, missing code in some Linux
634 * versions (v4.15, v4.16) prevents the creation of hash QPs with
637 * There is no choice but to attempt to instantiate a temporary RSS
638 * context in order to confirm its support.
640 cq = mlx4_glue->create_cq(ctx, 1, NULL, NULL, 0);
641 wq = cq ? mlx4_glue->create_wq
643 &(struct ibv_wq_init_attr){
644 .wq_type = IBV_WQT_RQ,
650 ind = wq ? mlx4_glue->create_rwq_ind_table
652 &(struct ibv_rwq_ind_table_init_attr){
653 .log_ind_tbl_size = 0,
657 qp = ind ? mlx4_glue->create_qp_ex
659 &(struct ibv_qp_init_attr_ex){
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,
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,
675 WARN("disabling unusable inner RSS capability due to kernel"
677 hw_rss_sup &= ~IBV_RX_HASH_INNER;
679 claim_zero(mlx4_glue->destroy_qp(qp));
682 claim_zero(mlx4_glue->destroy_rwq_ind_table(ind));
684 claim_zero(mlx4_glue->destroy_wq(wq));
686 claim_zero(mlx4_glue->destroy_cq(cq));
690 static struct rte_pci_driver mlx4_driver;
693 * PMD global initialization.
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.
700 * 0 on success, a negative errno value otherwise and rte_errno is set.
705 struct mlx4_shared_data *sd;
706 struct mlx4_local_data *ld = &mlx4_local_data;
709 if (mlx4_init_shared_data())
711 sd = mlx4_shared_data;
713 rte_spinlock_lock(&sd->lock);
714 switch (rte_eal_process_type()) {
715 case RTE_PROC_PRIMARY:
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();
727 case RTE_PROC_SECONDARY:
730 ret = mlx4_mp_init_secondary();
740 rte_spinlock_unlock(&sd->lock);
745 * DPDK callback to register a PCI device.
747 * This function creates an Ethernet device for each port of a given
751 * PCI driver structure (mlx4_driver).
753 * PCI device information.
756 * 0 on success, negative errno value otherwise and rte_errno is set.
759 mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
761 struct ibv_device **list;
762 struct ibv_device *ibv_dev;
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 = {
769 .mr_ext_memseg_en = 1,
773 char ifname[IF_NAMESIZE];
776 err = mlx4_init_once();
778 ERROR("unable to init PMD global data: %s",
779 strerror(rte_errno));
782 MLX4_ASSERT(pci_drv == &mlx4_driver);
783 list = mlx4_glue->get_device_list(&i);
786 MLX4_ASSERT(rte_errno);
787 if (rte_errno == ENOSYS)
788 ERROR("cannot list devices, is ib_uverbs loaded?");
793 * For each listed device, check related sysfs entry against
794 * the provided PCI ID.
797 struct rte_pci_addr pci_addr;
800 DEBUG("checking device \"%s\"", list[i]->name);
801 if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
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))
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]);
816 if (attr_ctx == NULL) {
817 mlx4_glue->free_device_list(list);
821 ERROR("cannot access device, is mlx4_ib loaded?");
825 ERROR("cannot use device, are drivers up to date?");
828 MLX4_ASSERT(err > 0);
833 DEBUG("device opened");
834 if (mlx4_glue->query_device(attr_ctx, &device_attr)) {
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");
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)) {
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];
864 /* If port is not enabled, skip. */
865 if (!(conf.ports.enabled & (1 << i)))
867 DEBUG("using port %u", port);
868 ctx = mlx4_glue->open_device(ibv_dev);
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");
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"
892 eth_dev->device = &pci_dev->device;
893 eth_dev->dev_ops = &mlx4_dev_sec_ops;
894 err = mlx4_proc_priv_init(eth_dev);
897 /* Receive command fd from primary process. */
898 err = mlx4_mp_req_verbs_cmd_fd(eth_dev);
903 /* Remap UAR for Tx queues. */
904 err = mlx4_tx_uar_init_secondary(eth_dev, err);
910 * Ethdev pointer is still required as input since
911 * the primary device is not accessible from the
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);
921 /* Check port status. */
922 err = mlx4_glue->query_port(ctx, port, &port_attr);
925 ERROR("port query failed: %s", strerror(err));
928 if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
930 ERROR("port %d is not configured in Ethernet mode",
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),
938 /* Make asynchronous FD non-blocking to handle interrupts. */
939 err = mlx4_fd_set_non_blocking(ctx->async_fd);
941 ERROR("cannot make asynchronous FD non-blocking: %s",
945 /* Allocate protection domain. */
946 pd = mlx4_glue->alloc_pd(ctx);
949 ERROR("PD allocation failure");
952 /* from rte_ethdev.c */
953 priv = rte_zmalloc("ethdev private structure",
955 RTE_CACHE_LINE_SIZE);
958 ERROR("priv allocation failure");
962 priv->device_attr = device_attr;
965 priv->mtu = RTE_ETHER_MTU;
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 =
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,
980 DEBUG("supported RSS hash fields mask: %016" PRIx64,
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 ");
990 ((device_attr_ex.tso_caps.max_tso > 0) &&
991 (device_attr_ex.tso_caps.supported_qpts &
992 (1 << IBV_QPT_RAW_PACKET)));
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);
1002 ERROR("cannot get MAC address, is mlx4_en loaded?"
1003 " (error: %s)", strerror(err));
1006 INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
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. */
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);
1019 DEBUG("port %u ifname is unknown", priv->port);
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) {
1028 ERROR("can not allocate rte ethdev");
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;
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.
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().
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,
1065 WARN("Verbs external allocator is not supported");
1067 priv->verbs_alloc_ctx.enabled = 1;
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);
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.
1081 err = mlx4_mr_btree_init(&priv->mr.cache,
1082 MLX4_MR_BTREE_CACHE_N * 2,
1083 eth_dev->device->numa_node);
1085 /* rte_errno is already set. */
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);
1097 if (eth_dev != NULL)
1098 eth_dev->data->dev_private = NULL;
1100 claim_zero(mlx4_glue->dealloc_pd(pd));
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);
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.
1118 claim_zero(mlx4_glue->close_device(attr_ctx));
1120 mlx4_glue->free_device_list(list);
1126 static const struct rte_pci_id mlx4_pci_id_map[] = {
1128 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1129 PCI_DEVICE_ID_MELLANOX_CONNECTX3)
1132 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1133 PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO)
1136 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
1137 PCI_DEVICE_ID_MELLANOX_CONNECTX3VF)
1144 static struct rte_pci_driver mlx4_driver = {
1146 .name = MLX4_DRIVER_NAME
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,
1153 #ifdef RTE_IBVERBS_LINK_DLOPEN
1156 * Suffix RTE_EAL_PMD_PATH with "-glue".
1158 * This function performs a sanity check on RTE_EAL_PMD_PATH before
1159 * suffixing its last component.
1162 * Output buffer, should be large enough otherwise NULL is returned.
1167 * Pointer to @p buf or @p NULL in case suffix cannot be appended.
1170 mlx4_glue_path(char *buf, size_t size)
1172 static const char *const bad[] = { "/", ".", "..", NULL };
1173 const char *path = RTE_EAL_PMD_PATH;
1174 size_t len = strlen(path);
1178 while (len && path[len - 1] == '/')
1180 for (off = len; off && path[off - 1] != '/'; --off)
1182 for (i = 0; bad[i]; ++i)
1183 if (!strncmp(path + off, bad[i], (int)(len - off)))
1185 i = snprintf(buf, size, "%.*s-glue", (int)len, path);
1186 if (i == -1 || (size_t)i >= size)
1190 ERROR("unable to append \"-glue\" to last component of"
1191 " RTE_EAL_PMD_PATH (\"" RTE_EAL_PMD_PATH "\"),"
1192 " please re-configure DPDK");
1197 * Initialization routine for run-time dependency on rdma-core.
1200 mlx4_glue_init(void)
1202 char glue_path[sizeof(RTE_EAL_PMD_PATH) - 1 + sizeof("-glue")];
1203 const char *path[] = {
1205 * A basic security check is necessary before trusting
1206 * MLX4_GLUE_PATH, which may override RTE_EAL_PMD_PATH.
1208 (geteuid() == getuid() && getegid() == getgid() ?
1209 getenv("MLX4_GLUE_PATH") : NULL),
1211 * When RTE_EAL_PMD_PATH is set, use its glue-suffixed
1212 * variant, otherwise let dlopen() look up libraries on its
1215 (*RTE_EAL_PMD_PATH ?
1216 mlx4_glue_path(glue_path, sizeof(glue_path)) : ""),
1219 void *handle = NULL;
1223 while (!handle && i != RTE_DIM(path)) {
1232 end = strpbrk(path[i], ":;");
1234 end = path[i] + strlen(path[i]);
1235 len = end - path[i];
1240 ret = snprintf(name, sizeof(name), "%.*s%s" MLX4_GLUE,
1242 (!len || *(end - 1) == '/') ? "" : "/");
1245 if (sizeof(name) != (size_t)ret + 1)
1247 DEBUG("looking for rdma-core glue as \"%s\"", name);
1248 handle = dlopen(name, RTLD_LAZY);
1259 WARN("cannot load glue library: %s", dlmsg);
1262 sym = dlsym(handle, "mlx4_glue");
1263 if (!sym || !*sym) {
1267 ERROR("cannot resolve glue symbol: %s", dlmsg);
1275 WARN("cannot initialize PMD due to missing run-time"
1276 " dependency on rdma-core libraries (libibverbs,"
1283 /* Initialize driver log type. */
1284 RTE_LOG_REGISTER(mlx4_logtype, pmd.net.mlx4, NOTICE)
1287 * Driver initialization routine.
1289 RTE_INIT(rte_mlx4_pmd_init)
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.
1296 setenv("MLX4_DEVICE_FATAL_CLEANUP", "1", 1);
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.
1303 setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
1304 #ifdef RTE_IBVERBS_LINK_DLOPEN
1305 if (mlx4_glue_init())
1307 MLX4_ASSERT(mlx4_glue);
1309 #ifdef RTE_LIBRTE_MLX4_DEBUG
1310 /* Glue structure must not contain any NULL pointers. */
1314 for (i = 0; i != sizeof(*mlx4_glue) / sizeof(void *); ++i)
1315 MLX4_ASSERT(((const void *const *)mlx4_glue)[i]);
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);
1323 mlx4_glue->fork_init();
1324 rte_pci_register(&mlx4_driver);
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");