4 * Copyright 2015 6WIND S.A.
5 * Copyright 2015 Mellanox.
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8 * modification, are permitted provided that the following conditions
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43 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
45 #pragma GCC diagnostic ignored "-pedantic"
47 #include <infiniband/verbs.h>
49 #pragma GCC diagnostic error "-pedantic"
52 /* DPDK headers don't like -pedantic. */
54 #pragma GCC diagnostic ignored "-pedantic"
56 #include <rte_malloc.h>
57 #include <rte_ethdev.h>
59 #include <rte_common.h>
61 #pragma GCC diagnostic error "-pedantic"
65 #include "mlx5_utils.h"
66 #include "mlx5_autoconf.h"
69 * DPDK callback to close the device.
71 * Destroy all queues and objects, free memory.
74 * Pointer to Ethernet device structure.
77 mlx5_dev_close(struct rte_eth_dev *dev)
79 struct priv *priv = dev->data->dev_private;
82 DEBUG("%p: closing device \"%s\"",
84 ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
85 if (priv->pd != NULL) {
86 assert(priv->ctx != NULL);
87 claim_zero(ibv_dealloc_pd(priv->pd));
88 claim_zero(ibv_close_device(priv->ctx));
90 assert(priv->ctx == NULL);
92 memset(priv, 0, sizeof(*priv));
95 static const struct eth_dev_ops mlx5_dev_ops = {
96 .dev_close = mlx5_dev_close,
100 struct rte_pci_addr pci_addr; /* associated PCI address */
101 uint32_t ports; /* physical ports bitfield. */
105 * Get device index in mlx5_dev[] from PCI bus address.
107 * @param[in] pci_addr
108 * PCI bus address to look for.
111 * mlx5_dev[] index on success, -1 on failure.
114 mlx5_dev_idx(struct rte_pci_addr *pci_addr)
119 assert(pci_addr != NULL);
120 for (i = 0; (i != RTE_DIM(mlx5_dev)); ++i) {
121 if ((mlx5_dev[i].pci_addr.domain == pci_addr->domain) &&
122 (mlx5_dev[i].pci_addr.bus == pci_addr->bus) &&
123 (mlx5_dev[i].pci_addr.devid == pci_addr->devid) &&
124 (mlx5_dev[i].pci_addr.function == pci_addr->function))
126 if ((mlx5_dev[i].ports == 0) && (ret == -1))
132 static struct eth_driver mlx5_driver;
135 * DPDK callback to register a PCI device.
137 * This function creates an Ethernet device for each port of a given
141 * PCI driver structure (mlx5_driver).
143 * PCI device information.
146 * 0 on success, negative errno value on failure.
149 mlx5_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
151 struct ibv_device **list;
152 struct ibv_device *ibv_dev;
154 struct ibv_context *attr_ctx = NULL;
155 struct ibv_device_attr device_attr;
161 assert(pci_drv == &mlx5_driver.pci_drv);
162 /* Get mlx5_dev[] index. */
163 idx = mlx5_dev_idx(&pci_dev->addr);
165 ERROR("this driver cannot support any more adapters");
168 DEBUG("using driver device index %d", idx);
170 /* Save PCI address. */
171 mlx5_dev[idx].pci_addr = pci_dev->addr;
172 list = ibv_get_device_list(&i);
175 if (errno == ENOSYS) {
176 WARN("cannot list devices, is ib_uverbs loaded?");
183 * For each listed device, check related sysfs entry against
184 * the provided PCI ID.
187 struct rte_pci_addr pci_addr;
190 DEBUG("checking device \"%s\"", list[i]->name);
191 if (mlx5_ibv_device_to_pci_addr(list[i], &pci_addr))
193 if ((pci_dev->addr.domain != pci_addr.domain) ||
194 (pci_dev->addr.bus != pci_addr.bus) ||
195 (pci_dev->addr.devid != pci_addr.devid) ||
196 (pci_dev->addr.function != pci_addr.function))
198 vf = ((pci_dev->id.device_id ==
199 PCI_DEVICE_ID_MELLANOX_CONNECTX4VF) ||
200 (pci_dev->id.device_id ==
201 PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF));
202 INFO("PCI information matches, using device \"%s\" (VF: %s)",
203 list[i]->name, (vf ? "true" : "false"));
204 attr_ctx = ibv_open_device(list[i]);
208 if (attr_ctx == NULL) {
209 ibv_free_device_list(list);
212 WARN("cannot access device, is mlx5_ib loaded?");
215 WARN("cannot use device, are drivers up to date?");
223 DEBUG("device opened");
224 if (ibv_query_device(attr_ctx, &device_attr))
226 INFO("%u port(s) detected", device_attr.phys_port_cnt);
228 for (i = 0; i < device_attr.phys_port_cnt; i++) {
229 uint32_t port = i + 1; /* ports are indexed from one */
230 uint32_t test = (1 << i);
231 struct ibv_context *ctx = NULL;
232 struct ibv_port_attr port_attr;
233 struct ibv_pd *pd = NULL;
234 struct priv *priv = NULL;
235 struct rte_eth_dev *eth_dev;
236 #ifdef HAVE_EXP_QUERY_DEVICE
237 struct ibv_exp_device_attr exp_device_attr;
238 #endif /* HAVE_EXP_QUERY_DEVICE */
239 struct ether_addr mac;
241 #ifdef HAVE_EXP_QUERY_DEVICE
242 exp_device_attr.comp_mask = IBV_EXP_DEVICE_ATTR_EXP_CAP_FLAGS;
244 exp_device_attr.comp_mask |= IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ;
245 #endif /* RSS_SUPPORT */
246 #endif /* HAVE_EXP_QUERY_DEVICE */
248 DEBUG("using port %u (%08" PRIx32 ")", port, test);
250 ctx = ibv_open_device(ibv_dev);
254 /* Check port status. */
255 err = ibv_query_port(ctx, port, &port_attr);
257 ERROR("port query failed: %s", strerror(err));
260 if (port_attr.state != IBV_PORT_ACTIVE)
261 DEBUG("port %d is not active: \"%s\" (%d)",
262 port, ibv_port_state_str(port_attr.state),
265 /* Allocate protection domain. */
266 pd = ibv_alloc_pd(ctx);
268 ERROR("PD allocation failure");
273 mlx5_dev[idx].ports |= test;
275 /* from rte_ethdev.c */
276 priv = rte_zmalloc("ethdev private structure",
278 RTE_CACHE_LINE_SIZE);
280 ERROR("priv allocation failure");
286 priv->device_attr = device_attr;
289 priv->mtu = ETHER_MTU;
290 #ifdef HAVE_EXP_QUERY_DEVICE
291 if (ibv_exp_query_device(ctx, &exp_device_attr)) {
292 ERROR("ibv_exp_query_device() failed");
296 if ((exp_device_attr.exp_device_cap_flags &
297 IBV_EXP_DEVICE_QPG) &&
298 (exp_device_attr.exp_device_cap_flags &
299 IBV_EXP_DEVICE_UD_RSS) &&
300 (exp_device_attr.comp_mask &
301 IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ) &&
302 (exp_device_attr.max_rss_tbl_sz > 0)) {
305 priv->max_rss_tbl_sz = exp_device_attr.max_rss_tbl_sz;
309 priv->max_rss_tbl_sz = 0;
311 priv->hw_tss = !!(exp_device_attr.exp_device_cap_flags &
312 IBV_EXP_DEVICE_UD_TSS);
313 DEBUG("device flags: %s%s%s",
314 (priv->hw_qpg ? "IBV_DEVICE_QPG " : ""),
315 (priv->hw_tss ? "IBV_DEVICE_TSS " : ""),
316 (priv->hw_rss ? "IBV_DEVICE_RSS " : ""));
318 DEBUG("maximum RSS indirection table size: %u",
319 exp_device_attr.max_rss_tbl_sz);
320 #endif /* RSS_SUPPORT */
323 ((exp_device_attr.exp_device_cap_flags &
324 IBV_EXP_DEVICE_RX_CSUM_TCP_UDP_PKT) &&
325 (exp_device_attr.exp_device_cap_flags &
326 IBV_EXP_DEVICE_RX_CSUM_IP_PKT));
327 DEBUG("checksum offloading is %ssupported",
328 (priv->hw_csum ? "" : "not "));
330 priv->hw_csum_l2tun = !!(exp_device_attr.exp_device_cap_flags &
331 IBV_EXP_DEVICE_VXLAN_SUPPORT);
332 DEBUG("L2 tunnel checksum offloads are %ssupported",
333 (priv->hw_csum_l2tun ? "" : "not "));
335 #endif /* HAVE_EXP_QUERY_DEVICE */
338 /* Configure the first MAC address by default. */
339 if (priv_get_mac(priv, &mac.addr_bytes)) {
340 ERROR("cannot get MAC address, is mlx5_en loaded?"
341 " (errno: %s)", strerror(errno));
344 INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
346 mac.addr_bytes[0], mac.addr_bytes[1],
347 mac.addr_bytes[2], mac.addr_bytes[3],
348 mac.addr_bytes[4], mac.addr_bytes[5]);
349 /* Register MAC and broadcast addresses. */
350 claim_zero(priv_mac_addr_add(priv, 0,
351 (const uint8_t (*)[ETHER_ADDR_LEN])
353 claim_zero(priv_mac_addr_add(priv, 1,
354 &(const uint8_t [ETHER_ADDR_LEN])
355 { "\xff\xff\xff\xff\xff\xff" }));
358 char ifname[IF_NAMESIZE];
360 if (priv_get_ifname(priv, &ifname) == 0)
361 DEBUG("port %u ifname is \"%s\"",
364 DEBUG("port %u ifname is unknown", priv->port);
367 /* Get actual MTU if possible. */
368 priv_get_mtu(priv, &priv->mtu);
369 DEBUG("port %u MTU is %u", priv->port, priv->mtu);
371 /* from rte_ethdev.c */
373 char name[RTE_ETH_NAME_MAX_LEN];
375 snprintf(name, sizeof(name), "%s port %u",
376 ibv_get_device_name(ibv_dev), port);
377 eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_PCI);
379 if (eth_dev == NULL) {
380 ERROR("can not allocate rte ethdev");
385 eth_dev->data->dev_private = priv;
386 eth_dev->pci_dev = pci_dev;
387 eth_dev->driver = &mlx5_driver;
388 eth_dev->data->rx_mbuf_alloc_failed = 0;
389 eth_dev->data->mtu = ETHER_MTU;
392 eth_dev->dev_ops = &mlx5_dev_ops;
393 eth_dev->data->mac_addrs = priv->mac;
395 /* Bring Ethernet device up. */
396 DEBUG("forcing Ethernet interface up");
397 priv_set_flags(priv, ~IFF_UP, IFF_UP);
403 claim_zero(ibv_dealloc_pd(pd));
405 claim_zero(ibv_close_device(ctx));
410 * XXX if something went wrong in the loop above, there is a resource
411 * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
412 * long as the dpdk does not provide a way to deallocate a ethdev and a
413 * way to enumerate the registered ethdevs to free the previous ones.
416 /* no port found, complain */
417 if (!mlx5_dev[idx].ports) {
424 claim_zero(ibv_close_device(attr_ctx));
426 ibv_free_device_list(list);
431 static const struct rte_pci_id mlx5_pci_id_map[] = {
433 .vendor_id = PCI_VENDOR_ID_MELLANOX,
434 .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX4,
435 .subsystem_vendor_id = PCI_ANY_ID,
436 .subsystem_device_id = PCI_ANY_ID
439 .vendor_id = PCI_VENDOR_ID_MELLANOX,
440 .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX4VF,
441 .subsystem_vendor_id = PCI_ANY_ID,
442 .subsystem_device_id = PCI_ANY_ID
445 .vendor_id = PCI_VENDOR_ID_MELLANOX,
446 .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX4LX,
447 .subsystem_vendor_id = PCI_ANY_ID,
448 .subsystem_device_id = PCI_ANY_ID
451 .vendor_id = PCI_VENDOR_ID_MELLANOX,
452 .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF,
453 .subsystem_vendor_id = PCI_ANY_ID,
454 .subsystem_device_id = PCI_ANY_ID
461 static struct eth_driver mlx5_driver = {
463 .name = MLX5_DRIVER_NAME,
464 .id_table = mlx5_pci_id_map,
465 .devinit = mlx5_pci_devinit,
467 .dev_private_size = sizeof(struct priv)
471 * Driver initialization routine.
474 rte_mlx5_pmd_init(const char *name, const char *args)
479 * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
480 * huge pages. Calling ibv_fork_init() during init allows
481 * applications to use fork() safely for purposes other than
482 * using this PMD, which is not supported in forked processes.
484 setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
486 rte_eal_pci_register(&mlx5_driver.pci_drv);
490 static struct rte_driver rte_mlx5_driver = {
492 .name = MLX5_DRIVER_NAME,
493 .init = rte_mlx5_pmd_init,
496 PMD_REGISTER_DRIVER(rte_mlx5_driver)