/*- * BSD LICENSE * * Copyright 2012 6WIND S.A. * Copyright 2012 Mellanox * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of 6WIND S.A. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* System headers. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Generated configuration header. */ #include "mlx4_autoconf.h" /* PMD headers. */ #include "mlx4.h" #include "mlx4_flow.h" /* Convenience macros for accessing mbuf fields. */ #define NEXT(m) ((m)->next) #define DATA_LEN(m) ((m)->data_len) #define PKT_LEN(m) ((m)->pkt_len) #define DATA_OFF(m) ((m)->data_off) #define SET_DATA_OFF(m, o) ((m)->data_off = (o)) #define NB_SEGS(m) ((m)->nb_segs) #define PORT(m) ((m)->port) /** Configuration structure for device arguments. */ struct mlx4_conf { struct { uint32_t present; /**< Bit-field for existing ports. */ uint32_t enabled; /**< Bit-field for user-enabled ports. */ } ports; }; /* Available parameters list. */ const char *pmd_mlx4_init_params[] = { MLX4_PMD_PORT_KVARG, NULL, }; static int mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx); static int mlx4_rx_intr_disable(struct rte_eth_dev *dev, uint16_t idx); static int priv_rx_intr_vec_enable(struct priv *priv); static void priv_rx_intr_vec_disable(struct priv *priv); /** * Lock private structure to protect it from concurrent access in the * control path. * * @param priv * Pointer to private structure. */ void priv_lock(struct priv *priv) { rte_spinlock_lock(&priv->lock); } /** * Unlock private structure. * * @param priv * Pointer to private structure. */ void priv_unlock(struct priv *priv) { rte_spinlock_unlock(&priv->lock); } /* Allocate a buffer on the stack and fill it with a printf format string. */ #define MKSTR(name, ...) \ char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \ \ snprintf(name, sizeof(name), __VA_ARGS__) /** * Get interface name from private structure. * * @param[in] priv * Pointer to private structure. * @param[out] ifname * Interface name output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE]) { DIR *dir; struct dirent *dent; unsigned int dev_type = 0; unsigned int dev_port_prev = ~0u; char match[IF_NAMESIZE] = ""; { MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path); dir = opendir(path); if (dir == NULL) { rte_errno = errno; return -rte_errno; } } while ((dent = readdir(dir)) != NULL) { char *name = dent->d_name; FILE *file; unsigned int dev_port; int r; if ((name[0] == '.') && ((name[1] == '\0') || ((name[1] == '.') && (name[2] == '\0')))) continue; MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path, name, (dev_type ? "dev_id" : "dev_port")); file = fopen(path, "rb"); if (file == NULL) { if (errno != ENOENT) continue; /* * Switch to dev_id when dev_port does not exist as * is the case with Linux kernel versions < 3.15. */ try_dev_id: match[0] = '\0'; if (dev_type) break; dev_type = 1; dev_port_prev = ~0u; rewinddir(dir); continue; } r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port); fclose(file); if (r != 1) continue; /* * Switch to dev_id when dev_port returns the same value for * all ports. May happen when using a MOFED release older than * 3.0 with a Linux kernel >= 3.15. */ if (dev_port == dev_port_prev) goto try_dev_id; dev_port_prev = dev_port; if (dev_port == (priv->port - 1u)) snprintf(match, sizeof(match), "%s", name); } closedir(dir); if (match[0] == '\0') { rte_errno = ENODEV; return -rte_errno; } strncpy(*ifname, match, sizeof(*ifname)); return 0; } /** * Read from sysfs entry. * * @param[in] priv * Pointer to private structure. * @param[in] entry * Entry name relative to sysfs path. * @param[out] buf * Data output buffer. * @param size * Buffer size. * * @return * Number of bytes read on success, negative errno value otherwise and * rte_errno is set. */ static int priv_sysfs_read(const struct priv *priv, const char *entry, char *buf, size_t size) { char ifname[IF_NAMESIZE]; FILE *file; int ret; ret = priv_get_ifname(priv, &ifname); if (ret) return ret; MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path, ifname, entry); file = fopen(path, "rb"); if (file == NULL) { rte_errno = errno; return -rte_errno; } ret = fread(buf, 1, size, file); if ((size_t)ret < size && ferror(file)) { rte_errno = EIO; ret = -rte_errno; } else { ret = size; } fclose(file); return ret; } /** * Write to sysfs entry. * * @param[in] priv * Pointer to private structure. * @param[in] entry * Entry name relative to sysfs path. * @param[in] buf * Data buffer. * @param size * Buffer size. * * @return * Number of bytes written on success, negative errno value otherwise and * rte_errno is set. */ static int priv_sysfs_write(const struct priv *priv, const char *entry, char *buf, size_t size) { char ifname[IF_NAMESIZE]; FILE *file; int ret; ret = priv_get_ifname(priv, &ifname); if (ret) return ret; MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path, ifname, entry); file = fopen(path, "wb"); if (file == NULL) { rte_errno = errno; return -rte_errno; } ret = fwrite(buf, 1, size, file); if ((size_t)ret < size || ferror(file)) { rte_errno = EIO; ret = -rte_errno; } else { ret = size; } fclose(file); return ret; } /** * Get unsigned long sysfs property. * * @param priv * Pointer to private structure. * @param[in] name * Entry name relative to sysfs path. * @param[out] value * Value output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value) { int ret; unsigned long value_ret; char value_str[32]; ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1)); if (ret < 0) { DEBUG("cannot read %s value from sysfs: %s", name, strerror(rte_errno)); return ret; } value_str[ret] = '\0'; errno = 0; value_ret = strtoul(value_str, NULL, 0); if (errno) { rte_errno = errno; DEBUG("invalid %s value `%s': %s", name, value_str, strerror(rte_errno)); return -rte_errno; } *value = value_ret; return 0; } /** * Set unsigned long sysfs property. * * @param priv * Pointer to private structure. * @param[in] name * Entry name relative to sysfs path. * @param value * Value to set. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value) { int ret; MKSTR(value_str, "%lu", value); ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1)); if (ret < 0) { DEBUG("cannot write %s `%s' (%lu) to sysfs: %s", name, value_str, value, strerror(rte_errno)); return ret; } return 0; } /** * Perform ifreq ioctl() on associated Ethernet device. * * @param[in] priv * Pointer to private structure. * @param req * Request number to pass to ioctl(). * @param[out] ifr * Interface request structure output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr) { int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); int ret; if (sock == -1) { rte_errno = errno; return -rte_errno; } ret = priv_get_ifname(priv, &ifr->ifr_name); if (!ret && ioctl(sock, req, ifr) == -1) { rte_errno = errno; ret = -rte_errno; } close(sock); return ret; } /** * Get device MTU. * * @param priv * Pointer to private structure. * @param[out] mtu * MTU value output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_get_mtu(struct priv *priv, uint16_t *mtu) { unsigned long ulong_mtu = 0; int ret = priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu); if (ret) return ret; *mtu = ulong_mtu; return 0; } /** * Set device MTU. * * @param priv * Pointer to private structure. * @param mtu * MTU value to set. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_set_mtu(struct priv *priv, uint16_t mtu) { uint16_t new_mtu; int ret = priv_set_sysfs_ulong(priv, "mtu", mtu); if (ret) return ret; ret = priv_get_mtu(priv, &new_mtu); if (ret) return ret; if (new_mtu == mtu) return 0; rte_errno = EINVAL; return -rte_errno; } /** * Set device flags. * * @param priv * Pointer to private structure. * @param keep * Bitmask for flags that must remain untouched. * @param flags * Bitmask for flags to modify. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags) { unsigned long tmp = 0; int ret = priv_get_sysfs_ulong(priv, "flags", &tmp); if (ret) return ret; tmp &= keep; tmp |= (flags & (~keep)); return priv_set_sysfs_ulong(priv, "flags", tmp); } /* Device configuration. */ static int txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc, unsigned int socket, const struct rte_eth_txconf *conf); static void txq_cleanup(struct txq *txq); static int rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc, unsigned int socket, const struct rte_eth_rxconf *conf, struct rte_mempool *mp); static void rxq_cleanup(struct rxq *rxq); static void priv_mac_addr_del(struct priv *priv); /** * Ethernet device configuration. * * Prepare the driver for a given number of TX and RX queues. * * @param dev * Pointer to Ethernet device structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int dev_configure(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; unsigned int rxqs_n = dev->data->nb_rx_queues; unsigned int txqs_n = dev->data->nb_tx_queues; priv->rxqs = (void *)dev->data->rx_queues; priv->txqs = (void *)dev->data->tx_queues; if (txqs_n != priv->txqs_n) { INFO("%p: TX queues number update: %u -> %u", (void *)dev, priv->txqs_n, txqs_n); priv->txqs_n = txqs_n; } if (rxqs_n != priv->rxqs_n) { INFO("%p: Rx queues number update: %u -> %u", (void *)dev, priv->rxqs_n, rxqs_n); priv->rxqs_n = rxqs_n; } return 0; } /** * DPDK callback for Ethernet device configuration. * * @param dev * Pointer to Ethernet device structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_dev_configure(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; int ret; priv_lock(priv); ret = dev_configure(dev); priv_unlock(priv); return ret; } static uint16_t mlx4_tx_burst(void *, struct rte_mbuf **, uint16_t); static uint16_t removed_rx_burst(void *, struct rte_mbuf **, uint16_t); /* TX queues handling. */ /** * Allocate TX queue elements. * * @param txq * Pointer to TX queue structure. * @param elts_n * Number of elements to allocate. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int txq_alloc_elts(struct txq *txq, unsigned int elts_n) { unsigned int i; struct txq_elt (*elts)[elts_n] = rte_calloc_socket("TXQ", 1, sizeof(*elts), 0, txq->socket); int ret = 0; if (elts == NULL) { ERROR("%p: can't allocate packets array", (void *)txq); ret = ENOMEM; goto error; } for (i = 0; (i != elts_n); ++i) { struct txq_elt *elt = &(*elts)[i]; elt->buf = NULL; } DEBUG("%p: allocated and configured %u WRs", (void *)txq, elts_n); txq->elts_n = elts_n; txq->elts = elts; txq->elts_head = 0; txq->elts_tail = 0; txq->elts_comp = 0; /* * Request send completion every MLX4_PMD_TX_PER_COMP_REQ packets or * at least 4 times per ring. */ txq->elts_comp_cd_init = ((MLX4_PMD_TX_PER_COMP_REQ < (elts_n / 4)) ? MLX4_PMD_TX_PER_COMP_REQ : (elts_n / 4)); txq->elts_comp_cd = txq->elts_comp_cd_init; assert(ret == 0); return 0; error: rte_free(elts); DEBUG("%p: failed, freed everything", (void *)txq); assert(ret > 0); rte_errno = ret; return -rte_errno; } /** * Free TX queue elements. * * @param txq * Pointer to TX queue structure. */ static void txq_free_elts(struct txq *txq) { unsigned int elts_n = txq->elts_n; unsigned int elts_head = txq->elts_head; unsigned int elts_tail = txq->elts_tail; struct txq_elt (*elts)[elts_n] = txq->elts; DEBUG("%p: freeing WRs", (void *)txq); txq->elts_n = 0; txq->elts_head = 0; txq->elts_tail = 0; txq->elts_comp = 0; txq->elts_comp_cd = 0; txq->elts_comp_cd_init = 0; txq->elts = NULL; if (elts == NULL) return; while (elts_tail != elts_head) { struct txq_elt *elt = &(*elts)[elts_tail]; assert(elt->buf != NULL); rte_pktmbuf_free(elt->buf); #ifndef NDEBUG /* Poisoning. */ memset(elt, 0x77, sizeof(*elt)); #endif if (++elts_tail == elts_n) elts_tail = 0; } rte_free(elts); } /** * Clean up a TX queue. * * Destroy objects, free allocated memory and reset the structure for reuse. * * @param txq * Pointer to TX queue structure. */ static void txq_cleanup(struct txq *txq) { size_t i; DEBUG("cleaning up %p", (void *)txq); txq_free_elts(txq); if (txq->qp != NULL) claim_zero(ibv_destroy_qp(txq->qp)); if (txq->cq != NULL) claim_zero(ibv_destroy_cq(txq->cq)); for (i = 0; (i != elemof(txq->mp2mr)); ++i) { if (txq->mp2mr[i].mp == NULL) break; assert(txq->mp2mr[i].mr != NULL); claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr)); } memset(txq, 0, sizeof(*txq)); } /** * Manage TX completions. * * When sending a burst, mlx4_tx_burst() posts several WRs. * To improve performance, a completion event is only required once every * MLX4_PMD_TX_PER_COMP_REQ sends. Doing so discards completion information * for other WRs, but this information would not be used anyway. * * @param txq * Pointer to TX queue structure. * * @return * 0 on success, -1 on failure. */ static int txq_complete(struct txq *txq) { unsigned int elts_comp = txq->elts_comp; unsigned int elts_tail = txq->elts_tail; const unsigned int elts_n = txq->elts_n; struct ibv_wc wcs[elts_comp]; int wcs_n; if (unlikely(elts_comp == 0)) return 0; wcs_n = ibv_poll_cq(txq->cq, elts_comp, wcs); if (unlikely(wcs_n == 0)) return 0; if (unlikely(wcs_n < 0)) { DEBUG("%p: ibv_poll_cq() failed (wcs_n=%d)", (void *)txq, wcs_n); return -1; } elts_comp -= wcs_n; assert(elts_comp <= txq->elts_comp); /* * Assume WC status is successful as nothing can be done about it * anyway. */ elts_tail += wcs_n * txq->elts_comp_cd_init; if (elts_tail >= elts_n) elts_tail -= elts_n; txq->elts_tail = elts_tail; txq->elts_comp = elts_comp; return 0; } struct mlx4_check_mempool_data { int ret; char *start; char *end; }; /* Called by mlx4_check_mempool() when iterating the memory chunks. */ static void mlx4_check_mempool_cb(struct rte_mempool *mp, void *opaque, struct rte_mempool_memhdr *memhdr, unsigned mem_idx) { struct mlx4_check_mempool_data *data = opaque; (void)mp; (void)mem_idx; /* It already failed, skip the next chunks. */ if (data->ret != 0) return; /* It is the first chunk. */ if (data->start == NULL && data->end == NULL) { data->start = memhdr->addr; data->end = data->start + memhdr->len; return; } if (data->end == memhdr->addr) { data->end += memhdr->len; return; } if (data->start == (char *)memhdr->addr + memhdr->len) { data->start -= memhdr->len; return; } /* Error, mempool is not virtually contigous. */ data->ret = -1; } /** * Check if a mempool can be used: it must be virtually contiguous. * * @param[in] mp * Pointer to memory pool. * @param[out] start * Pointer to the start address of the mempool virtual memory area * @param[out] end * Pointer to the end address of the mempool virtual memory area * * @return * 0 on success (mempool is virtually contiguous), -1 on error. */ static int mlx4_check_mempool(struct rte_mempool *mp, uintptr_t *start, uintptr_t *end) { struct mlx4_check_mempool_data data; memset(&data, 0, sizeof(data)); rte_mempool_mem_iter(mp, mlx4_check_mempool_cb, &data); *start = (uintptr_t)data.start; *end = (uintptr_t)data.end; return data.ret; } /* For best performance, this function should not be inlined. */ static struct ibv_mr *mlx4_mp2mr(struct ibv_pd *, struct rte_mempool *) __rte_noinline; /** * Register mempool as a memory region. * * @param pd * Pointer to protection domain. * @param mp * Pointer to memory pool. * * @return * Memory region pointer, NULL in case of error and rte_errno is set. */ static struct ibv_mr * mlx4_mp2mr(struct ibv_pd *pd, struct rte_mempool *mp) { const struct rte_memseg *ms = rte_eal_get_physmem_layout(); uintptr_t start; uintptr_t end; unsigned int i; struct ibv_mr *mr; if (mlx4_check_mempool(mp, &start, &end) != 0) { rte_errno = EINVAL; ERROR("mempool %p: not virtually contiguous", (void *)mp); return NULL; } DEBUG("mempool %p area start=%p end=%p size=%zu", (void *)mp, (void *)start, (void *)end, (size_t)(end - start)); /* Round start and end to page boundary if found in memory segments. */ for (i = 0; (i < RTE_MAX_MEMSEG) && (ms[i].addr != NULL); ++i) { uintptr_t addr = (uintptr_t)ms[i].addr; size_t len = ms[i].len; unsigned int align = ms[i].hugepage_sz; if ((start > addr) && (start < addr + len)) start = RTE_ALIGN_FLOOR(start, align); if ((end > addr) && (end < addr + len)) end = RTE_ALIGN_CEIL(end, align); } DEBUG("mempool %p using start=%p end=%p size=%zu for MR", (void *)mp, (void *)start, (void *)end, (size_t)(end - start)); mr = ibv_reg_mr(pd, (void *)start, end - start, IBV_ACCESS_LOCAL_WRITE); if (!mr) rte_errno = errno ? errno : EINVAL; return mr; } /** * Get Memory Pool (MP) from mbuf. If mbuf is indirect, the pool from which * the cloned mbuf is allocated is returned instead. * * @param buf * Pointer to mbuf. * * @return * Memory pool where data is located for given mbuf. */ static struct rte_mempool * txq_mb2mp(struct rte_mbuf *buf) { if (unlikely(RTE_MBUF_INDIRECT(buf))) return rte_mbuf_from_indirect(buf)->pool; return buf->pool; } /** * Get Memory Region (MR) <-> Memory Pool (MP) association from txq->mp2mr[]. * Add MP to txq->mp2mr[] if it's not registered yet. If mp2mr[] is full, * remove an entry first. * * @param txq * Pointer to TX queue structure. * @param[in] mp * Memory Pool for which a Memory Region lkey must be returned. * * @return * mr->lkey on success, (uint32_t)-1 on failure. */ static uint32_t txq_mp2mr(struct txq *txq, struct rte_mempool *mp) { unsigned int i; struct ibv_mr *mr; for (i = 0; (i != elemof(txq->mp2mr)); ++i) { if (unlikely(txq->mp2mr[i].mp == NULL)) { /* Unknown MP, add a new MR for it. */ break; } if (txq->mp2mr[i].mp == mp) { assert(txq->mp2mr[i].lkey != (uint32_t)-1); assert(txq->mp2mr[i].mr->lkey == txq->mp2mr[i].lkey); return txq->mp2mr[i].lkey; } } /* Add a new entry, register MR first. */ DEBUG("%p: discovered new memory pool \"%s\" (%p)", (void *)txq, mp->name, (void *)mp); mr = mlx4_mp2mr(txq->priv->pd, mp); if (unlikely(mr == NULL)) { DEBUG("%p: unable to configure MR, ibv_reg_mr() failed.", (void *)txq); return (uint32_t)-1; } if (unlikely(i == elemof(txq->mp2mr))) { /* Table is full, remove oldest entry. */ DEBUG("%p: MR <-> MP table full, dropping oldest entry.", (void *)txq); --i; claim_zero(ibv_dereg_mr(txq->mp2mr[0].mr)); memmove(&txq->mp2mr[0], &txq->mp2mr[1], (sizeof(txq->mp2mr) - sizeof(txq->mp2mr[0]))); } /* Store the new entry. */ txq->mp2mr[i].mp = mp; txq->mp2mr[i].mr = mr; txq->mp2mr[i].lkey = mr->lkey; DEBUG("%p: new MR lkey for MP \"%s\" (%p): 0x%08" PRIu32, (void *)txq, mp->name, (void *)mp, txq->mp2mr[i].lkey); return txq->mp2mr[i].lkey; } struct txq_mp2mr_mbuf_check_data { int ret; }; /** * Callback function for rte_mempool_obj_iter() to check whether a given * mempool object looks like a mbuf. * * @param[in] mp * The mempool pointer * @param[in] arg * Context data (struct txq_mp2mr_mbuf_check_data). Contains the * return value. * @param[in] obj * Object address. * @param index * Object index, unused. */ static void txq_mp2mr_mbuf_check(struct rte_mempool *mp, void *arg, void *obj, uint32_t index __rte_unused) { struct txq_mp2mr_mbuf_check_data *data = arg; struct rte_mbuf *buf = obj; /* * Check whether mbuf structure fits element size and whether mempool * pointer is valid. */ if (sizeof(*buf) > mp->elt_size || buf->pool != mp) data->ret = -1; } /** * Iterator function for rte_mempool_walk() to register existing mempools and * fill the MP to MR cache of a TX queue. * * @param[in] mp * Memory Pool to register. * @param *arg * Pointer to TX queue structure. */ static void txq_mp2mr_iter(struct rte_mempool *mp, void *arg) { struct txq *txq = arg; struct txq_mp2mr_mbuf_check_data data = { .ret = 0, }; /* Register mempool only if the first element looks like a mbuf. */ if (rte_mempool_obj_iter(mp, txq_mp2mr_mbuf_check, &data) == 0 || data.ret == -1) return; txq_mp2mr(txq, mp); } /** * DPDK callback for TX. * * @param dpdk_txq * Generic pointer to TX queue structure. * @param[in] pkts * Packets to transmit. * @param pkts_n * Number of packets in array. * * @return * Number of packets successfully transmitted (<= pkts_n). */ static uint16_t mlx4_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) { struct txq *txq = (struct txq *)dpdk_txq; struct ibv_send_wr *wr_head = NULL; struct ibv_send_wr **wr_next = &wr_head; struct ibv_send_wr *wr_bad = NULL; unsigned int elts_head = txq->elts_head; const unsigned int elts_n = txq->elts_n; unsigned int elts_comp_cd = txq->elts_comp_cd; unsigned int elts_comp = 0; unsigned int i; unsigned int max; int err; assert(elts_comp_cd != 0); txq_complete(txq); max = (elts_n - (elts_head - txq->elts_tail)); if (max > elts_n) max -= elts_n; assert(max >= 1); assert(max <= elts_n); /* Always leave one free entry in the ring. */ --max; if (max == 0) return 0; if (max > pkts_n) max = pkts_n; for (i = 0; (i != max); ++i) { struct rte_mbuf *buf = pkts[i]; unsigned int elts_head_next = (((elts_head + 1) == elts_n) ? 0 : elts_head + 1); struct txq_elt *elt_next = &(*txq->elts)[elts_head_next]; struct txq_elt *elt = &(*txq->elts)[elts_head]; struct ibv_send_wr *wr = &elt->wr; unsigned int segs = NB_SEGS(buf); unsigned int sent_size = 0; uint32_t send_flags = 0; /* Clean up old buffer. */ if (likely(elt->buf != NULL)) { struct rte_mbuf *tmp = elt->buf; #ifndef NDEBUG /* Poisoning. */ memset(elt, 0x66, sizeof(*elt)); #endif /* Faster than rte_pktmbuf_free(). */ do { struct rte_mbuf *next = NEXT(tmp); rte_pktmbuf_free_seg(tmp); tmp = next; } while (tmp != NULL); } /* Request TX completion. */ if (unlikely(--elts_comp_cd == 0)) { elts_comp_cd = txq->elts_comp_cd_init; ++elts_comp; send_flags |= IBV_SEND_SIGNALED; } if (likely(segs == 1)) { struct ibv_sge *sge = &elt->sge; uintptr_t addr; uint32_t length; uint32_t lkey; /* Retrieve buffer information. */ addr = rte_pktmbuf_mtod(buf, uintptr_t); length = DATA_LEN(buf); /* Retrieve Memory Region key for this memory pool. */ lkey = txq_mp2mr(txq, txq_mb2mp(buf)); if (unlikely(lkey == (uint32_t)-1)) { /* MR does not exist. */ DEBUG("%p: unable to get MP <-> MR" " association", (void *)txq); /* Clean up TX element. */ elt->buf = NULL; goto stop; } /* Update element. */ elt->buf = buf; if (txq->priv->vf) rte_prefetch0((volatile void *) (uintptr_t)addr); RTE_MBUF_PREFETCH_TO_FREE(elt_next->buf); sge->addr = addr; sge->length = length; sge->lkey = lkey; sent_size += length; } else { err = -1; goto stop; } if (sent_size <= txq->max_inline) send_flags |= IBV_SEND_INLINE; elts_head = elts_head_next; /* Increment sent bytes counter. */ txq->stats.obytes += sent_size; /* Set up WR. */ wr->sg_list = &elt->sge; wr->num_sge = segs; wr->opcode = IBV_WR_SEND; wr->send_flags = send_flags; *wr_next = wr; wr_next = &wr->next; } stop: /* Take a shortcut if nothing must be sent. */ if (unlikely(i == 0)) return 0; /* Increment sent packets counter. */ txq->stats.opackets += i; /* Ring QP doorbell. */ *wr_next = NULL; assert(wr_head); err = ibv_post_send(txq->qp, wr_head, &wr_bad); if (unlikely(err)) { uint64_t obytes = 0; uint64_t opackets = 0; /* Rewind bad WRs. */ while (wr_bad != NULL) { int j; /* Force completion request if one was lost. */ if (wr_bad->send_flags & IBV_SEND_SIGNALED) { elts_comp_cd = 1; --elts_comp; } ++opackets; for (j = 0; j < wr_bad->num_sge; ++j) obytes += wr_bad->sg_list[j].length; elts_head = (elts_head ? elts_head : elts_n) - 1; wr_bad = wr_bad->next; } txq->stats.opackets -= opackets; txq->stats.obytes -= obytes; i -= opackets; DEBUG("%p: ibv_post_send() failed, %" PRIu64 " packets" " (%" PRIu64 " bytes) rejected: %s", (void *)txq, opackets, obytes, (err <= -1) ? "Internal error" : strerror(err)); } txq->elts_head = elts_head; txq->elts_comp += elts_comp; txq->elts_comp_cd = elts_comp_cd; return i; } /** * Configure a TX queue. * * @param dev * Pointer to Ethernet device structure. * @param txq * Pointer to TX queue structure. * @param desc * Number of descriptors to configure in queue. * @param socket * NUMA socket on which memory must be allocated. * @param[in] conf * Thresholds parameters. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc, unsigned int socket, const struct rte_eth_txconf *conf) { struct priv *priv = dev->data->dev_private; struct txq tmpl = { .priv = priv, .socket = socket }; union { struct ibv_qp_init_attr init; struct ibv_qp_attr mod; } attr; int ret; (void)conf; /* Thresholds configuration (ignored). */ if (priv == NULL) { rte_errno = EINVAL; goto error; } if (desc == 0) { rte_errno = EINVAL; ERROR("%p: invalid number of Tx descriptors", (void *)dev); goto error; } /* MRs will be registered in mp2mr[] later. */ tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0); if (tmpl.cq == NULL) { rte_errno = ENOMEM; ERROR("%p: CQ creation failure: %s", (void *)dev, strerror(rte_errno)); goto error; } DEBUG("priv->device_attr.max_qp_wr is %d", priv->device_attr.max_qp_wr); DEBUG("priv->device_attr.max_sge is %d", priv->device_attr.max_sge); attr.init = (struct ibv_qp_init_attr){ /* CQ to be associated with the send queue. */ .send_cq = tmpl.cq, /* CQ to be associated with the receive queue. */ .recv_cq = tmpl.cq, .cap = { /* Max number of outstanding WRs. */ .max_send_wr = ((priv->device_attr.max_qp_wr < desc) ? priv->device_attr.max_qp_wr : desc), /* Max number of scatter/gather elements in a WR. */ .max_send_sge = 1, .max_inline_data = MLX4_PMD_MAX_INLINE, }, .qp_type = IBV_QPT_RAW_PACKET, /* * Do *NOT* enable this, completions events are managed per * Tx burst. */ .sq_sig_all = 0, }; tmpl.qp = ibv_create_qp(priv->pd, &attr.init); if (tmpl.qp == NULL) { rte_errno = errno ? errno : EINVAL; ERROR("%p: QP creation failure: %s", (void *)dev, strerror(rte_errno)); goto error; } /* ibv_create_qp() updates this value. */ tmpl.max_inline = attr.init.cap.max_inline_data; attr.mod = (struct ibv_qp_attr){ /* Move the QP to this state. */ .qp_state = IBV_QPS_INIT, /* Primary port number. */ .port_num = priv->port }; ret = ibv_modify_qp(tmpl.qp, &attr.mod, IBV_QP_STATE | IBV_QP_PORT); if (ret) { rte_errno = ret; ERROR("%p: QP state to IBV_QPS_INIT failed: %s", (void *)dev, strerror(rte_errno)); goto error; } ret = txq_alloc_elts(&tmpl, desc); if (ret) { rte_errno = ret; ERROR("%p: TXQ allocation failed: %s", (void *)dev, strerror(rte_errno)); goto error; } attr.mod = (struct ibv_qp_attr){ .qp_state = IBV_QPS_RTR }; ret = ibv_modify_qp(tmpl.qp, &attr.mod, IBV_QP_STATE); if (ret) { rte_errno = ret; ERROR("%p: QP state to IBV_QPS_RTR failed: %s", (void *)dev, strerror(rte_errno)); goto error; } attr.mod.qp_state = IBV_QPS_RTS; ret = ibv_modify_qp(tmpl.qp, &attr.mod, IBV_QP_STATE); if (ret) { rte_errno = ret; ERROR("%p: QP state to IBV_QPS_RTS failed: %s", (void *)dev, strerror(rte_errno)); goto error; } /* Clean up txq in case we're reinitializing it. */ DEBUG("%p: cleaning-up old txq just in case", (void *)txq); txq_cleanup(txq); *txq = tmpl; DEBUG("%p: txq updated with %p", (void *)txq, (void *)&tmpl); /* Pre-register known mempools. */ rte_mempool_walk(txq_mp2mr_iter, txq); return 0; error: ret = rte_errno; txq_cleanup(&tmpl); rte_errno = ret; assert(rte_errno > 0); return -rte_errno; } /** * DPDK callback to configure a TX queue. * * @param dev * Pointer to Ethernet device structure. * @param idx * TX queue index. * @param desc * Number of descriptors to configure in queue. * @param socket * NUMA socket on which memory must be allocated. * @param[in] conf * Thresholds parameters. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, unsigned int socket, const struct rte_eth_txconf *conf) { struct priv *priv = dev->data->dev_private; struct txq *txq = (*priv->txqs)[idx]; int ret; priv_lock(priv); DEBUG("%p: configuring queue %u for %u descriptors", (void *)dev, idx, desc); if (idx >= priv->txqs_n) { rte_errno = EOVERFLOW; ERROR("%p: queue index out of range (%u >= %u)", (void *)dev, idx, priv->txqs_n); priv_unlock(priv); return -rte_errno; } if (txq != NULL) { DEBUG("%p: reusing already allocated queue index %u (%p)", (void *)dev, idx, (void *)txq); if (priv->started) { rte_errno = EEXIST; priv_unlock(priv); return -rte_errno; } (*priv->txqs)[idx] = NULL; txq_cleanup(txq); } else { txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0, socket); if (txq == NULL) { rte_errno = ENOMEM; ERROR("%p: unable to allocate queue index %u", (void *)dev, idx); priv_unlock(priv); return -rte_errno; } } ret = txq_setup(dev, txq, desc, socket, conf); if (ret) rte_free(txq); else { txq->stats.idx = idx; DEBUG("%p: adding TX queue %p to list", (void *)dev, (void *)txq); (*priv->txqs)[idx] = txq; /* Update send callback. */ dev->tx_pkt_burst = mlx4_tx_burst; } priv_unlock(priv); return ret; } /** * DPDK callback to release a TX queue. * * @param dpdk_txq * Generic TX queue pointer. */ static void mlx4_tx_queue_release(void *dpdk_txq) { struct txq *txq = (struct txq *)dpdk_txq; struct priv *priv; unsigned int i; if (txq == NULL) return; priv = txq->priv; priv_lock(priv); for (i = 0; (i != priv->txqs_n); ++i) if ((*priv->txqs)[i] == txq) { DEBUG("%p: removing TX queue %p from list", (void *)priv->dev, (void *)txq); (*priv->txqs)[i] = NULL; break; } txq_cleanup(txq); rte_free(txq); priv_unlock(priv); } /* RX queues handling. */ /** * Allocate RX queue elements. * * @param rxq * Pointer to RX queue structure. * @param elts_n * Number of elements to allocate. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int rxq_alloc_elts(struct rxq *rxq, unsigned int elts_n) { unsigned int i; struct rxq_elt (*elts)[elts_n] = rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0, rxq->socket); if (elts == NULL) { rte_errno = ENOMEM; ERROR("%p: can't allocate packets array", (void *)rxq); goto error; } /* For each WR (packet). */ for (i = 0; (i != elts_n); ++i) { struct rxq_elt *elt = &(*elts)[i]; struct ibv_recv_wr *wr = &elt->wr; struct ibv_sge *sge = &(*elts)[i].sge; struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp); if (buf == NULL) { rte_errno = ENOMEM; ERROR("%p: empty mbuf pool", (void *)rxq); goto error; } elt->buf = buf; wr->next = &(*elts)[(i + 1)].wr; wr->sg_list = sge; wr->num_sge = 1; /* Headroom is reserved by rte_pktmbuf_alloc(). */ assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM); /* Buffer is supposed to be empty. */ assert(rte_pktmbuf_data_len(buf) == 0); assert(rte_pktmbuf_pkt_len(buf) == 0); /* sge->addr must be able to store a pointer. */ assert(sizeof(sge->addr) >= sizeof(uintptr_t)); /* SGE keeps its headroom. */ sge->addr = (uintptr_t) ((uint8_t *)buf->buf_addr + RTE_PKTMBUF_HEADROOM); sge->length = (buf->buf_len - RTE_PKTMBUF_HEADROOM); sge->lkey = rxq->mr->lkey; /* Redundant check for tailroom. */ assert(sge->length == rte_pktmbuf_tailroom(buf)); } /* The last WR pointer must be NULL. */ (*elts)[(i - 1)].wr.next = NULL; DEBUG("%p: allocated and configured %u single-segment WRs", (void *)rxq, elts_n); rxq->elts_n = elts_n; rxq->elts_head = 0; rxq->elts = elts; return 0; error: if (elts != NULL) { for (i = 0; (i != elemof(*elts)); ++i) rte_pktmbuf_free_seg((*elts)[i].buf); rte_free(elts); } DEBUG("%p: failed, freed everything", (void *)rxq); assert(rte_errno > 0); return -rte_errno; } /** * Free RX queue elements. * * @param rxq * Pointer to RX queue structure. */ static void rxq_free_elts(struct rxq *rxq) { unsigned int i; unsigned int elts_n = rxq->elts_n; struct rxq_elt (*elts)[elts_n] = rxq->elts; DEBUG("%p: freeing WRs", (void *)rxq); rxq->elts_n = 0; rxq->elts = NULL; if (elts == NULL) return; for (i = 0; (i != elemof(*elts)); ++i) rte_pktmbuf_free_seg((*elts)[i].buf); rte_free(elts); } /** * Unregister a MAC address. * * @param priv * Pointer to private structure. */ static void priv_mac_addr_del(struct priv *priv) { #ifndef NDEBUG uint8_t (*mac)[ETHER_ADDR_LEN] = &priv->mac.addr_bytes; #endif if (!priv->mac_flow) return; DEBUG("%p: removing MAC address %02x:%02x:%02x:%02x:%02x:%02x", (void *)priv, (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5]); claim_zero(ibv_destroy_flow(priv->mac_flow)); priv->mac_flow = NULL; } /** * Register a MAC address. * * The MAC address is registered in queue 0. * * @param priv * Pointer to private structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_mac_addr_add(struct priv *priv) { uint8_t (*mac)[ETHER_ADDR_LEN] = &priv->mac.addr_bytes; struct rxq *rxq; struct ibv_flow *flow; /* If device isn't started, this is all we need to do. */ if (!priv->started) return 0; if (priv->isolated) return 0; if (*priv->rxqs && (*priv->rxqs)[0]) rxq = (*priv->rxqs)[0]; else return 0; /* Allocate flow specification on the stack. */ struct __attribute__((packed)) { struct ibv_flow_attr attr; struct ibv_flow_spec_eth spec; } data; struct ibv_flow_attr *attr = &data.attr; struct ibv_flow_spec_eth *spec = &data.spec; if (priv->mac_flow) priv_mac_addr_del(priv); /* * No padding must be inserted by the compiler between attr and spec. * This layout is expected by libibverbs. */ assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec); *attr = (struct ibv_flow_attr){ .type = IBV_FLOW_ATTR_NORMAL, .priority = 3, .num_of_specs = 1, .port = priv->port, .flags = 0 }; *spec = (struct ibv_flow_spec_eth){ .type = IBV_FLOW_SPEC_ETH, .size = sizeof(*spec), .val = { .dst_mac = { (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5] }, }, .mask = { .dst_mac = "\xff\xff\xff\xff\xff\xff", } }; DEBUG("%p: adding MAC address %02x:%02x:%02x:%02x:%02x:%02x", (void *)priv, (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5]); /* Create related flow. */ flow = ibv_create_flow(rxq->qp, attr); if (flow == NULL) { rte_errno = errno ? errno : EINVAL; ERROR("%p: flow configuration failed, errno=%d: %s", (void *)rxq, rte_errno, strerror(errno)); return -rte_errno; } assert(priv->mac_flow == NULL); priv->mac_flow = flow; return 0; } /** * Clean up a RX queue. * * Destroy objects, free allocated memory and reset the structure for reuse. * * @param rxq * Pointer to RX queue structure. */ static void rxq_cleanup(struct rxq *rxq) { DEBUG("cleaning up %p", (void *)rxq); rxq_free_elts(rxq); if (rxq->qp != NULL) claim_zero(ibv_destroy_qp(rxq->qp)); if (rxq->cq != NULL) claim_zero(ibv_destroy_cq(rxq->cq)); if (rxq->channel != NULL) claim_zero(ibv_destroy_comp_channel(rxq->channel)); if (rxq->mr != NULL) claim_zero(ibv_dereg_mr(rxq->mr)); memset(rxq, 0, sizeof(*rxq)); } /** * DPDK callback for RX. * * The following function doesn't manage scattered packets. * * @param dpdk_rxq * Generic pointer to RX queue structure. * @param[out] pkts * Array to store received packets. * @param pkts_n * Maximum number of packets in array. * * @return * Number of packets successfully received (<= pkts_n). */ static uint16_t mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n) { struct rxq *rxq = (struct rxq *)dpdk_rxq; struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts; const unsigned int elts_n = rxq->elts_n; unsigned int elts_head = rxq->elts_head; struct ibv_wc wcs[pkts_n]; struct ibv_recv_wr *wr_head = NULL; struct ibv_recv_wr **wr_next = &wr_head; struct ibv_recv_wr *wr_bad = NULL; unsigned int i; unsigned int pkts_ret = 0; int ret; ret = ibv_poll_cq(rxq->cq, pkts_n, wcs); if (unlikely(ret == 0)) return 0; if (unlikely(ret < 0)) { DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)", (void *)rxq, ret); return 0; } assert(ret <= (int)pkts_n); /* For each work completion. */ for (i = 0; i != (unsigned int)ret; ++i) { struct ibv_wc *wc = &wcs[i]; struct rxq_elt *elt = &(*elts)[elts_head]; struct ibv_recv_wr *wr = &elt->wr; uint32_t len = wc->byte_len; struct rte_mbuf *seg = elt->buf; struct rte_mbuf *rep; /* Sanity checks. */ assert(wr->sg_list == &elt->sge); assert(wr->num_sge == 1); assert(elts_head < rxq->elts_n); assert(rxq->elts_head < rxq->elts_n); /* * Fetch initial bytes of packet descriptor into a * cacheline while allocating rep. */ rte_mbuf_prefetch_part1(seg); rte_mbuf_prefetch_part2(seg); /* Link completed WRs together for repost. */ *wr_next = wr; wr_next = &wr->next; if (unlikely(wc->status != IBV_WC_SUCCESS)) { /* Whatever, just repost the offending WR. */ DEBUG("rxq=%p: bad work completion status (%d): %s", (void *)rxq, wc->status, ibv_wc_status_str(wc->status)); /* Increment dropped packets counter. */ ++rxq->stats.idropped; goto repost; } rep = rte_mbuf_raw_alloc(rxq->mp); if (unlikely(rep == NULL)) { /* * Unable to allocate a replacement mbuf, * repost WR. */ DEBUG("rxq=%p: can't allocate a new mbuf", (void *)rxq); /* Increase out of memory counters. */ ++rxq->stats.rx_nombuf; ++rxq->priv->dev->data->rx_mbuf_alloc_failed; goto repost; } /* Reconfigure sge to use rep instead of seg. */ elt->sge.addr = (uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM; assert(elt->sge.lkey == rxq->mr->lkey); elt->buf = rep; /* Update seg information. */ SET_DATA_OFF(seg, RTE_PKTMBUF_HEADROOM); NB_SEGS(seg) = 1; PORT(seg) = rxq->port_id; NEXT(seg) = NULL; PKT_LEN(seg) = len; DATA_LEN(seg) = len; seg->packet_type = 0; seg->ol_flags = 0; /* Return packet. */ *(pkts++) = seg; ++pkts_ret; /* Increase bytes counter. */ rxq->stats.ibytes += len; repost: if (++elts_head >= elts_n) elts_head = 0; continue; } if (unlikely(i == 0)) return 0; /* Repost WRs. */ *wr_next = NULL; assert(wr_head); ret = ibv_post_recv(rxq->qp, wr_head, &wr_bad); if (unlikely(ret)) { /* Inability to repost WRs is fatal. */ DEBUG("%p: recv_burst(): failed (ret=%d)", (void *)rxq->priv, ret); abort(); } rxq->elts_head = elts_head; /* Increase packets counter. */ rxq->stats.ipackets += pkts_ret; return pkts_ret; } /** * Allocate a Queue Pair. * Optionally setup inline receive if supported. * * @param priv * Pointer to private structure. * @param cq * Completion queue to associate with QP. * @param desc * Number of descriptors in QP (hint only). * * @return * QP pointer or NULL in case of error and rte_errno is set. */ static struct ibv_qp * rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc) { struct ibv_qp *qp; struct ibv_qp_init_attr attr = { /* CQ to be associated with the send queue. */ .send_cq = cq, /* CQ to be associated with the receive queue. */ .recv_cq = cq, .cap = { /* Max number of outstanding WRs. */ .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ? priv->device_attr.max_qp_wr : desc), /* Max number of scatter/gather elements in a WR. */ .max_recv_sge = 1, }, .qp_type = IBV_QPT_RAW_PACKET, }; qp = ibv_create_qp(priv->pd, &attr); if (!qp) rte_errno = errno ? errno : EINVAL; return qp; } /** * Configure a RX queue. * * @param dev * Pointer to Ethernet device structure. * @param rxq * Pointer to RX queue structure. * @param desc * Number of descriptors to configure in queue. * @param socket * NUMA socket on which memory must be allocated. * @param[in] conf * Thresholds parameters. * @param mp * Memory pool for buffer allocations. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc, unsigned int socket, const struct rte_eth_rxconf *conf, struct rte_mempool *mp) { struct priv *priv = dev->data->dev_private; struct rxq tmpl = { .priv = priv, .mp = mp, .socket = socket }; struct ibv_qp_attr mod; struct ibv_recv_wr *bad_wr; unsigned int mb_len; int ret; (void)conf; /* Thresholds configuration (ignored). */ mb_len = rte_pktmbuf_data_room_size(mp); if (desc == 0) { rte_errno = EINVAL; ERROR("%p: invalid number of Rx descriptors", (void *)dev); goto error; } /* Enable scattered packets support for this queue if necessary. */ assert(mb_len >= RTE_PKTMBUF_HEADROOM); if (dev->data->dev_conf.rxmode.max_rx_pkt_len <= (mb_len - RTE_PKTMBUF_HEADROOM)) { ; } else if (dev->data->dev_conf.rxmode.enable_scatter) { WARN("%p: scattered mode has been requested but is" " not supported, this may lead to packet loss", (void *)dev); } else { WARN("%p: the requested maximum Rx packet size (%u) is" " larger than a single mbuf (%u) and scattered" " mode has not been requested", (void *)dev, dev->data->dev_conf.rxmode.max_rx_pkt_len, mb_len - RTE_PKTMBUF_HEADROOM); } /* Use the entire RX mempool as the memory region. */ tmpl.mr = mlx4_mp2mr(priv->pd, mp); if (tmpl.mr == NULL) { rte_errno = EINVAL; ERROR("%p: MR creation failure: %s", (void *)dev, strerror(rte_errno)); goto error; } if (dev->data->dev_conf.intr_conf.rxq) { tmpl.channel = ibv_create_comp_channel(priv->ctx); if (tmpl.channel == NULL) { rte_errno = ENOMEM; ERROR("%p: Rx interrupt completion channel creation" " failure: %s", (void *)dev, strerror(rte_errno)); goto error; } } tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, tmpl.channel, 0); if (tmpl.cq == NULL) { rte_errno = ENOMEM; ERROR("%p: CQ creation failure: %s", (void *)dev, strerror(rte_errno)); goto error; } DEBUG("priv->device_attr.max_qp_wr is %d", priv->device_attr.max_qp_wr); DEBUG("priv->device_attr.max_sge is %d", priv->device_attr.max_sge); tmpl.qp = rxq_setup_qp(priv, tmpl.cq, desc); if (tmpl.qp == NULL) { ERROR("%p: QP creation failure: %s", (void *)dev, strerror(rte_errno)); goto error; } mod = (struct ibv_qp_attr){ /* Move the QP to this state. */ .qp_state = IBV_QPS_INIT, /* Primary port number. */ .port_num = priv->port }; ret = ibv_modify_qp(tmpl.qp, &mod, IBV_QP_STATE | IBV_QP_PORT); if (ret) { rte_errno = ret; ERROR("%p: QP state to IBV_QPS_INIT failed: %s", (void *)dev, strerror(rte_errno)); goto error; } ret = rxq_alloc_elts(&tmpl, desc); if (ret) { ERROR("%p: RXQ allocation failed: %s", (void *)dev, strerror(rte_errno)); goto error; } ret = ibv_post_recv(tmpl.qp, &(*tmpl.elts)[0].wr, &bad_wr); if (ret) { rte_errno = ret; ERROR("%p: ibv_post_recv() failed for WR %p: %s", (void *)dev, (void *)bad_wr, strerror(rte_errno)); goto error; } mod = (struct ibv_qp_attr){ .qp_state = IBV_QPS_RTR }; ret = ibv_modify_qp(tmpl.qp, &mod, IBV_QP_STATE); if (ret) { rte_errno = ret; ERROR("%p: QP state to IBV_QPS_RTR failed: %s", (void *)dev, strerror(rte_errno)); goto error; } /* Save port ID. */ tmpl.port_id = dev->data->port_id; DEBUG("%p: RTE port ID: %u", (void *)rxq, tmpl.port_id); /* Clean up rxq in case we're reinitializing it. */ DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq); rxq_cleanup(rxq); *rxq = tmpl; DEBUG("%p: rxq updated with %p", (void *)rxq, (void *)&tmpl); return 0; error: ret = rte_errno; rxq_cleanup(&tmpl); rte_errno = ret; assert(rte_errno > 0); return -rte_errno; } /** * DPDK callback to configure a RX queue. * * @param dev * Pointer to Ethernet device structure. * @param idx * RX queue index. * @param desc * Number of descriptors to configure in queue. * @param socket * NUMA socket on which memory must be allocated. * @param[in] conf * Thresholds parameters. * @param mp * Memory pool for buffer allocations. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc, unsigned int socket, const struct rte_eth_rxconf *conf, struct rte_mempool *mp) { struct priv *priv = dev->data->dev_private; struct rxq *rxq = (*priv->rxqs)[idx]; int ret; priv_lock(priv); DEBUG("%p: configuring queue %u for %u descriptors", (void *)dev, idx, desc); if (idx >= priv->rxqs_n) { rte_errno = EOVERFLOW; ERROR("%p: queue index out of range (%u >= %u)", (void *)dev, idx, priv->rxqs_n); priv_unlock(priv); return -rte_errno; } if (rxq != NULL) { DEBUG("%p: reusing already allocated queue index %u (%p)", (void *)dev, idx, (void *)rxq); if (priv->started) { rte_errno = EEXIST; priv_unlock(priv); return -rte_errno; } (*priv->rxqs)[idx] = NULL; if (idx == 0) priv_mac_addr_del(priv); rxq_cleanup(rxq); } else { rxq = rte_calloc_socket("RXQ", 1, sizeof(*rxq), 0, socket); if (rxq == NULL) { rte_errno = ENOMEM; ERROR("%p: unable to allocate queue index %u", (void *)dev, idx); priv_unlock(priv); return -rte_errno; } } ret = rxq_setup(dev, rxq, desc, socket, conf, mp); if (ret) rte_free(rxq); else { rxq->stats.idx = idx; DEBUG("%p: adding RX queue %p to list", (void *)dev, (void *)rxq); (*priv->rxqs)[idx] = rxq; /* Update receive callback. */ dev->rx_pkt_burst = mlx4_rx_burst; } priv_unlock(priv); return ret; } /** * DPDK callback to release a RX queue. * * @param dpdk_rxq * Generic RX queue pointer. */ static void mlx4_rx_queue_release(void *dpdk_rxq) { struct rxq *rxq = (struct rxq *)dpdk_rxq; struct priv *priv; unsigned int i; if (rxq == NULL) return; priv = rxq->priv; priv_lock(priv); for (i = 0; (i != priv->rxqs_n); ++i) if ((*priv->rxqs)[i] == rxq) { DEBUG("%p: removing RX queue %p from list", (void *)priv->dev, (void *)rxq); (*priv->rxqs)[i] = NULL; if (i == 0) priv_mac_addr_del(priv); break; } rxq_cleanup(rxq); rte_free(rxq); priv_unlock(priv); } static int priv_dev_interrupt_handler_install(struct priv *, struct rte_eth_dev *); static int priv_dev_removal_interrupt_handler_install(struct priv *, struct rte_eth_dev *); static int priv_dev_link_interrupt_handler_install(struct priv *, struct rte_eth_dev *); /** * DPDK callback to start the device. * * Simulate device start by attaching all configured flows. * * @param dev * Pointer to Ethernet device structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_dev_start(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; int ret; priv_lock(priv); if (priv->started) { priv_unlock(priv); return 0; } DEBUG("%p: attaching configured flows to all RX queues", (void *)dev); priv->started = 1; ret = priv_mac_addr_add(priv); if (ret) goto err; ret = priv_dev_link_interrupt_handler_install(priv, dev); if (ret) { ERROR("%p: LSC handler install failed", (void *)dev); goto err; } ret = priv_dev_removal_interrupt_handler_install(priv, dev); if (ret) { ERROR("%p: RMV handler install failed", (void *)dev); goto err; } ret = priv_rx_intr_vec_enable(priv); if (ret) { ERROR("%p: Rx interrupt vector creation failed", (void *)dev); goto err; } ret = mlx4_priv_flow_start(priv); if (ret) { ERROR("%p: flow start failed: %s", (void *)dev, strerror(ret)); goto err; } priv_unlock(priv); return 0; err: /* Rollback. */ priv_mac_addr_del(priv); priv->started = 0; priv_unlock(priv); return ret; } /** * DPDK callback to stop the device. * * Simulate device stop by detaching all configured flows. * * @param dev * Pointer to Ethernet device structure. */ static void mlx4_dev_stop(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; priv_lock(priv); if (!priv->started) { priv_unlock(priv); return; } DEBUG("%p: detaching flows from all RX queues", (void *)dev); priv->started = 0; mlx4_priv_flow_stop(priv); priv_mac_addr_del(priv); priv_unlock(priv); } /** * Dummy DPDK callback for TX. * * This function is used to temporarily replace the real callback during * unsafe control operations on the queue, or in case of error. * * @param dpdk_txq * Generic pointer to TX queue structure. * @param[in] pkts * Packets to transmit. * @param pkts_n * Number of packets in array. * * @return * Number of packets successfully transmitted (<= pkts_n). */ static uint16_t removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n) { (void)dpdk_txq; (void)pkts; (void)pkts_n; return 0; } /** * Dummy DPDK callback for RX. * * This function is used to temporarily replace the real callback during * unsafe control operations on the queue, or in case of error. * * @param dpdk_rxq * Generic pointer to RX queue structure. * @param[out] pkts * Array to store received packets. * @param pkts_n * Maximum number of packets in array. * * @return * Number of packets successfully received (<= pkts_n). */ static uint16_t removed_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n) { (void)dpdk_rxq; (void)pkts; (void)pkts_n; return 0; } static int priv_dev_interrupt_handler_uninstall(struct priv *, struct rte_eth_dev *); static int priv_dev_removal_interrupt_handler_uninstall(struct priv *, struct rte_eth_dev *); static int priv_dev_link_interrupt_handler_uninstall(struct priv *, struct rte_eth_dev *); /** * DPDK callback to close the device. * * Destroy all queues and objects, free memory. * * @param dev * Pointer to Ethernet device structure. */ static void mlx4_dev_close(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; void *tmp; unsigned int i; if (priv == NULL) return; priv_lock(priv); DEBUG("%p: closing device \"%s\"", (void *)dev, ((priv->ctx != NULL) ? priv->ctx->device->name : "")); priv_mac_addr_del(priv); /* * Prevent crashes when queues are still in use. This is unfortunately * still required for DPDK 1.3 because some programs (such as testpmd) * never release them before closing the device. */ dev->rx_pkt_burst = removed_rx_burst; dev->tx_pkt_burst = removed_tx_burst; if (priv->rxqs != NULL) { /* XXX race condition if mlx4_rx_burst() is still running. */ usleep(1000); for (i = 0; (i != priv->rxqs_n); ++i) { tmp = (*priv->rxqs)[i]; if (tmp == NULL) continue; (*priv->rxqs)[i] = NULL; rxq_cleanup(tmp); rte_free(tmp); } priv->rxqs_n = 0; priv->rxqs = NULL; } if (priv->txqs != NULL) { /* XXX race condition if mlx4_tx_burst() is still running. */ usleep(1000); for (i = 0; (i != priv->txqs_n); ++i) { tmp = (*priv->txqs)[i]; if (tmp == NULL) continue; (*priv->txqs)[i] = NULL; txq_cleanup(tmp); rte_free(tmp); } priv->txqs_n = 0; priv->txqs = NULL; } if (priv->pd != NULL) { assert(priv->ctx != NULL); claim_zero(ibv_dealloc_pd(priv->pd)); claim_zero(ibv_close_device(priv->ctx)); } else assert(priv->ctx == NULL); priv_dev_removal_interrupt_handler_uninstall(priv, dev); priv_dev_link_interrupt_handler_uninstall(priv, dev); priv_rx_intr_vec_disable(priv); priv_unlock(priv); memset(priv, 0, sizeof(*priv)); } /** * Change the link state (UP / DOWN). * * @param priv * Pointer to Ethernet device private data. * @param up * Nonzero for link up, otherwise link down. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_set_link(struct priv *priv, int up) { struct rte_eth_dev *dev = priv->dev; int err; if (up) { err = priv_set_flags(priv, ~IFF_UP, IFF_UP); if (err) return err; dev->rx_pkt_burst = mlx4_rx_burst; } else { err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP); if (err) return err; dev->rx_pkt_burst = removed_rx_burst; dev->tx_pkt_burst = removed_tx_burst; } return 0; } /** * DPDK callback to bring the link DOWN. * * @param dev * Pointer to Ethernet device structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_set_link_down(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; int err; priv_lock(priv); err = priv_set_link(priv, 0); priv_unlock(priv); return err; } /** * DPDK callback to bring the link UP. * * @param dev * Pointer to Ethernet device structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_set_link_up(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; int err; priv_lock(priv); err = priv_set_link(priv, 1); priv_unlock(priv); return err; } /** * DPDK callback to get information about the device. * * @param dev * Pointer to Ethernet device structure. * @param[out] info * Info structure output buffer. */ static void mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) { struct priv *priv = dev->data->dev_private; unsigned int max; char ifname[IF_NAMESIZE]; info->pci_dev = RTE_ETH_DEV_TO_PCI(dev); if (priv == NULL) return; priv_lock(priv); /* FIXME: we should ask the device for these values. */ info->min_rx_bufsize = 32; info->max_rx_pktlen = 65536; /* * Since we need one CQ per QP, the limit is the minimum number * between the two values. */ max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ? priv->device_attr.max_qp : priv->device_attr.max_cq); /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */ if (max >= 65535) max = 65535; info->max_rx_queues = max; info->max_tx_queues = max; /* Last array entry is reserved for broadcast. */ info->max_mac_addrs = 1; info->rx_offload_capa = 0; info->tx_offload_capa = 0; if (priv_get_ifname(priv, &ifname) == 0) info->if_index = if_nametoindex(ifname); info->speed_capa = ETH_LINK_SPEED_1G | ETH_LINK_SPEED_10G | ETH_LINK_SPEED_20G | ETH_LINK_SPEED_40G | ETH_LINK_SPEED_56G; priv_unlock(priv); } /** * DPDK callback to get device statistics. * * @param dev * Pointer to Ethernet device structure. * @param[out] stats * Stats structure output buffer. */ static void mlx4_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats) { struct priv *priv = dev->data->dev_private; struct rte_eth_stats tmp = {0}; unsigned int i; unsigned int idx; if (priv == NULL) return; priv_lock(priv); /* Add software counters. */ for (i = 0; (i != priv->rxqs_n); ++i) { struct rxq *rxq = (*priv->rxqs)[i]; if (rxq == NULL) continue; idx = rxq->stats.idx; if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) { tmp.q_ipackets[idx] += rxq->stats.ipackets; tmp.q_ibytes[idx] += rxq->stats.ibytes; tmp.q_errors[idx] += (rxq->stats.idropped + rxq->stats.rx_nombuf); } tmp.ipackets += rxq->stats.ipackets; tmp.ibytes += rxq->stats.ibytes; tmp.ierrors += rxq->stats.idropped; tmp.rx_nombuf += rxq->stats.rx_nombuf; } for (i = 0; (i != priv->txqs_n); ++i) { struct txq *txq = (*priv->txqs)[i]; if (txq == NULL) continue; idx = txq->stats.idx; if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) { tmp.q_opackets[idx] += txq->stats.opackets; tmp.q_obytes[idx] += txq->stats.obytes; tmp.q_errors[idx] += txq->stats.odropped; } tmp.opackets += txq->stats.opackets; tmp.obytes += txq->stats.obytes; tmp.oerrors += txq->stats.odropped; } *stats = tmp; priv_unlock(priv); } /** * DPDK callback to clear device statistics. * * @param dev * Pointer to Ethernet device structure. */ static void mlx4_stats_reset(struct rte_eth_dev *dev) { struct priv *priv = dev->data->dev_private; unsigned int i; unsigned int idx; if (priv == NULL) return; priv_lock(priv); for (i = 0; (i != priv->rxqs_n); ++i) { if ((*priv->rxqs)[i] == NULL) continue; idx = (*priv->rxqs)[i]->stats.idx; (*priv->rxqs)[i]->stats = (struct mlx4_rxq_stats){ .idx = idx }; } for (i = 0; (i != priv->txqs_n); ++i) { if ((*priv->txqs)[i] == NULL) continue; idx = (*priv->txqs)[i]->stats.idx; (*priv->txqs)[i]->stats = (struct mlx4_txq_stats){ .idx = idx }; } priv_unlock(priv); } /** * DPDK callback to retrieve physical link information. * * @param dev * Pointer to Ethernet device structure. * @param wait_to_complete * Wait for request completion (ignored). * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_link_update(struct rte_eth_dev *dev, int wait_to_complete) { const struct priv *priv = dev->data->dev_private; struct ethtool_cmd edata = { .cmd = ETHTOOL_GSET }; struct ifreq ifr; struct rte_eth_link dev_link; int link_speed = 0; /* priv_lock() is not taken to allow concurrent calls. */ if (priv == NULL) { rte_errno = EINVAL; return -rte_errno; } (void)wait_to_complete; if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) { WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(rte_errno)); return -rte_errno; } memset(&dev_link, 0, sizeof(dev_link)); dev_link.link_status = ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING)); ifr.ifr_data = (void *)&edata; if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) { WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s", strerror(rte_errno)); return -rte_errno; } link_speed = ethtool_cmd_speed(&edata); if (link_speed == -1) dev_link.link_speed = 0; else dev_link.link_speed = link_speed; dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ? ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX); dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds & ETH_LINK_SPEED_FIXED); dev->data->dev_link = dev_link; return 0; } /** * DPDK callback to change the MTU. * * @param dev * Pointer to Ethernet device structure. * @param in_mtu * New MTU. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu) { struct priv *priv = dev->data->dev_private; int ret = 0; priv_lock(priv); /* Set kernel interface MTU first. */ if (priv_set_mtu(priv, mtu)) { ret = rte_errno; WARN("cannot set port %u MTU to %u: %s", priv->port, mtu, strerror(rte_errno)); goto out; } else DEBUG("adapter port %u MTU set to %u", priv->port, mtu); priv->mtu = mtu; out: priv_unlock(priv); assert(ret >= 0); return -ret; } /** * DPDK callback to get flow control status. * * @param dev * Pointer to Ethernet device structure. * @param[out] fc_conf * Flow control output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) { struct priv *priv = dev->data->dev_private; struct ifreq ifr; struct ethtool_pauseparam ethpause = { .cmd = ETHTOOL_GPAUSEPARAM }; int ret; ifr.ifr_data = (void *)ðpause; priv_lock(priv); if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) { ret = rte_errno; WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)" " failed: %s", strerror(rte_errno)); goto out; } fc_conf->autoneg = ethpause.autoneg; if (ethpause.rx_pause && ethpause.tx_pause) fc_conf->mode = RTE_FC_FULL; else if (ethpause.rx_pause) fc_conf->mode = RTE_FC_RX_PAUSE; else if (ethpause.tx_pause) fc_conf->mode = RTE_FC_TX_PAUSE; else fc_conf->mode = RTE_FC_NONE; ret = 0; out: priv_unlock(priv); assert(ret >= 0); return -ret; } /** * DPDK callback to modify flow control parameters. * * @param dev * Pointer to Ethernet device structure. * @param[in] fc_conf * Flow control parameters. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) { struct priv *priv = dev->data->dev_private; struct ifreq ifr; struct ethtool_pauseparam ethpause = { .cmd = ETHTOOL_SPAUSEPARAM }; int ret; ifr.ifr_data = (void *)ðpause; ethpause.autoneg = fc_conf->autoneg; if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) || (fc_conf->mode & RTE_FC_RX_PAUSE)) ethpause.rx_pause = 1; else ethpause.rx_pause = 0; if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) || (fc_conf->mode & RTE_FC_TX_PAUSE)) ethpause.tx_pause = 1; else ethpause.tx_pause = 0; priv_lock(priv); if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) { ret = rte_errno; WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)" " failed: %s", strerror(rte_errno)); goto out; } ret = 0; out: priv_unlock(priv); assert(ret >= 0); return -ret; } const struct rte_flow_ops mlx4_flow_ops = { .validate = mlx4_flow_validate, .create = mlx4_flow_create, .destroy = mlx4_flow_destroy, .flush = mlx4_flow_flush, .query = NULL, .isolate = mlx4_flow_isolate, }; /** * Manage filter operations. * * @param dev * Pointer to Ethernet device structure. * @param filter_type * Filter type. * @param filter_op * Operation to perform. * @param arg * Pointer to operation-specific structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_dev_filter_ctrl(struct rte_eth_dev *dev, enum rte_filter_type filter_type, enum rte_filter_op filter_op, void *arg) { switch (filter_type) { case RTE_ETH_FILTER_GENERIC: if (filter_op != RTE_ETH_FILTER_GET) break; *(const void **)arg = &mlx4_flow_ops; return 0; default: ERROR("%p: filter type (%d) not supported", (void *)dev, filter_type); break; } rte_errno = ENOTSUP; return -rte_errno; } static const struct eth_dev_ops mlx4_dev_ops = { .dev_configure = mlx4_dev_configure, .dev_start = mlx4_dev_start, .dev_stop = mlx4_dev_stop, .dev_set_link_down = mlx4_set_link_down, .dev_set_link_up = mlx4_set_link_up, .dev_close = mlx4_dev_close, .link_update = mlx4_link_update, .stats_get = mlx4_stats_get, .stats_reset = mlx4_stats_reset, .dev_infos_get = mlx4_dev_infos_get, .rx_queue_setup = mlx4_rx_queue_setup, .tx_queue_setup = mlx4_tx_queue_setup, .rx_queue_release = mlx4_rx_queue_release, .tx_queue_release = mlx4_tx_queue_release, .flow_ctrl_get = mlx4_dev_get_flow_ctrl, .flow_ctrl_set = mlx4_dev_set_flow_ctrl, .mtu_set = mlx4_dev_set_mtu, .filter_ctrl = mlx4_dev_filter_ctrl, .rx_queue_intr_enable = mlx4_rx_intr_enable, .rx_queue_intr_disable = mlx4_rx_intr_disable, }; /** * Get PCI information from struct ibv_device. * * @param device * Pointer to Ethernet device structure. * @param[out] pci_addr * PCI bus address output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_ibv_device_to_pci_addr(const struct ibv_device *device, struct rte_pci_addr *pci_addr) { FILE *file; char line[32]; MKSTR(path, "%s/device/uevent", device->ibdev_path); file = fopen(path, "rb"); if (file == NULL) { rte_errno = errno; return -rte_errno; } while (fgets(line, sizeof(line), file) == line) { size_t len = strlen(line); int ret; /* Truncate long lines. */ if (len == (sizeof(line) - 1)) while (line[(len - 1)] != '\n') { ret = fgetc(file); if (ret == EOF) break; line[(len - 1)] = ret; } /* Extract information. */ if (sscanf(line, "PCI_SLOT_NAME=" "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n", &pci_addr->domain, &pci_addr->bus, &pci_addr->devid, &pci_addr->function) == 4) { ret = 0; break; } } fclose(file); return 0; } /** * Get MAC address by querying netdevice. * * @param[in] priv * struct priv for the requested device. * @param[out] mac * MAC address output buffer. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_get_mac(struct priv *priv, uint8_t (*mac)[ETHER_ADDR_LEN]) { struct ifreq request; int ret = priv_ifreq(priv, SIOCGIFHWADDR, &request); if (ret) return ret; memcpy(mac, request.ifr_hwaddr.sa_data, ETHER_ADDR_LEN); return 0; } static void mlx4_dev_link_status_handler(void *); static void mlx4_dev_interrupt_handler(void *); /** * Link/device status handler. * * @param priv * Pointer to private structure. * @param dev * Pointer to the rte_eth_dev structure. * @param events * Pointer to event flags holder. * * @return * Number of events */ static int priv_dev_status_handler(struct priv *priv, struct rte_eth_dev *dev, uint32_t *events) { struct ibv_async_event event; int port_change = 0; struct rte_eth_link *link = &dev->data->dev_link; int ret = 0; *events = 0; /* Read all message and acknowledge them. */ for (;;) { if (ibv_get_async_event(priv->ctx, &event)) break; if ((event.event_type == IBV_EVENT_PORT_ACTIVE || event.event_type == IBV_EVENT_PORT_ERR) && (priv->intr_conf.lsc == 1)) { port_change = 1; ret++; } else if (event.event_type == IBV_EVENT_DEVICE_FATAL && priv->intr_conf.rmv == 1) { *events |= (1 << RTE_ETH_EVENT_INTR_RMV); ret++; } else DEBUG("event type %d on port %d not handled", event.event_type, event.element.port_num); ibv_ack_async_event(&event); } if (!port_change) return ret; mlx4_link_update(dev, 0); if (((link->link_speed == 0) && link->link_status) || ((link->link_speed != 0) && !link->link_status)) { if (!priv->pending_alarm) { /* Inconsistent status, check again later. */ priv->pending_alarm = 1; rte_eal_alarm_set(MLX4_ALARM_TIMEOUT_US, mlx4_dev_link_status_handler, dev); } } else { *events |= (1 << RTE_ETH_EVENT_INTR_LSC); } return ret; } /** * Handle delayed link status event. * * @param arg * Registered argument. */ static void mlx4_dev_link_status_handler(void *arg) { struct rte_eth_dev *dev = arg; struct priv *priv = dev->data->dev_private; uint32_t events; int ret; priv_lock(priv); assert(priv->pending_alarm == 1); priv->pending_alarm = 0; ret = priv_dev_status_handler(priv, dev, &events); priv_unlock(priv); if (ret > 0 && events & (1 << RTE_ETH_EVENT_INTR_LSC)) _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL); } /** * Handle interrupts from the NIC. * * @param[in] intr_handle * Interrupt handler. * @param cb_arg * Callback argument. */ static void mlx4_dev_interrupt_handler(void *cb_arg) { struct rte_eth_dev *dev = cb_arg; struct priv *priv = dev->data->dev_private; int ret; uint32_t ev; int i; priv_lock(priv); ret = priv_dev_status_handler(priv, dev, &ev); priv_unlock(priv); if (ret > 0) { for (i = RTE_ETH_EVENT_UNKNOWN; i < RTE_ETH_EVENT_MAX; i++) { if (ev & (1 << i)) { ev &= ~(1 << i); _rte_eth_dev_callback_process(dev, i, NULL, NULL); ret--; } } if (ret) WARN("%d event%s not processed", ret, (ret > 1 ? "s were" : " was")); } } /** * Uninstall interrupt handler. * * @param priv * Pointer to private structure. * @param dev * Pointer to the rte_eth_dev structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev) { int ret; if (priv->intr_conf.lsc || priv->intr_conf.rmv) return 0; ret = rte_intr_callback_unregister(&priv->intr_handle, mlx4_dev_interrupt_handler, dev); if (ret < 0) { rte_errno = ret; ERROR("rte_intr_callback_unregister failed with %d %s", ret, strerror(rte_errno)); } priv->intr_handle.fd = 0; priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN; return ret; } /** * Install interrupt handler. * * @param priv * Pointer to private structure. * @param dev * Pointer to the rte_eth_dev structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev) { int flags; int rc; /* * Check whether the interrupt handler has already been installed * for either type of interrupt. */ if (priv->intr_conf.lsc && priv->intr_conf.rmv && priv->intr_handle.fd) return 0; assert(priv->ctx->async_fd > 0); flags = fcntl(priv->ctx->async_fd, F_GETFL); rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK); if (rc < 0) { rte_errno = errno ? errno : EINVAL; INFO("failed to change file descriptor async event queue"); dev->data->dev_conf.intr_conf.lsc = 0; dev->data->dev_conf.intr_conf.rmv = 0; return -rte_errno; } else { priv->intr_handle.fd = priv->ctx->async_fd; priv->intr_handle.type = RTE_INTR_HANDLE_EXT; rc = rte_intr_callback_register(&priv->intr_handle, mlx4_dev_interrupt_handler, dev); if (rc) { rte_errno = -rc; ERROR("rte_intr_callback_register failed " " (rte_errno: %s)", strerror(rte_errno)); return -rte_errno; } } return 0; } /** * Uninstall interrupt handler. * * @param priv * Pointer to private structure. * @param dev * Pointer to the rte_eth_dev structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_dev_removal_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev) { if (dev->data->dev_conf.intr_conf.rmv) { priv->intr_conf.rmv = 0; return priv_dev_interrupt_handler_uninstall(priv, dev); } return 0; } /** * Uninstall interrupt handler. * * @param priv * Pointer to private structure. * @param dev * Pointer to the rte_eth_dev structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_dev_link_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev) { int ret = 0; if (dev->data->dev_conf.intr_conf.lsc) { priv->intr_conf.lsc = 0; ret = priv_dev_interrupt_handler_uninstall(priv, dev); if (ret) return ret; } if (priv->pending_alarm) if (rte_eal_alarm_cancel(mlx4_dev_link_status_handler, dev)) { ERROR("rte_eal_alarm_cancel failed " " (rte_errno: %s)", strerror(rte_errno)); return -rte_errno; } priv->pending_alarm = 0; return 0; } /** * Install link interrupt handler. * * @param priv * Pointer to private structure. * @param dev * Pointer to the rte_eth_dev structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_dev_link_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev) { int ret; if (dev->data->dev_conf.intr_conf.lsc) { ret = priv_dev_interrupt_handler_install(priv, dev); if (ret) return ret; priv->intr_conf.lsc = 1; } return 0; } /** * Install removal interrupt handler. * * @param priv * Pointer to private structure. * @param dev * Pointer to the rte_eth_dev structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_dev_removal_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev) { int ret; if (dev->data->dev_conf.intr_conf.rmv) { ret = priv_dev_interrupt_handler_install(priv, dev); if (ret) return ret; priv->intr_conf.rmv = 1; } return 0; } /** * Allocate queue vector and fill epoll fd list for Rx interrupts. * * @param priv * Pointer to private structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int priv_rx_intr_vec_enable(struct priv *priv) { unsigned int i; unsigned int rxqs_n = priv->rxqs_n; unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID); unsigned int count = 0; struct rte_intr_handle *intr_handle = priv->dev->intr_handle; if (!priv->dev->data->dev_conf.intr_conf.rxq) return 0; priv_rx_intr_vec_disable(priv); intr_handle->intr_vec = malloc(sizeof(intr_handle->intr_vec[rxqs_n])); if (intr_handle->intr_vec == NULL) { rte_errno = ENOMEM; ERROR("failed to allocate memory for interrupt vector," " Rx interrupts will not be supported"); return -rte_errno; } intr_handle->type = RTE_INTR_HANDLE_EXT; for (i = 0; i != n; ++i) { struct rxq *rxq = (*priv->rxqs)[i]; int fd; int flags; int rc; /* Skip queues that cannot request interrupts. */ if (!rxq || !rxq->channel) { /* Use invalid intr_vec[] index to disable entry. */ intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + RTE_MAX_RXTX_INTR_VEC_ID; continue; } if (count >= RTE_MAX_RXTX_INTR_VEC_ID) { rte_errno = E2BIG; ERROR("too many Rx queues for interrupt vector size" " (%d), Rx interrupts cannot be enabled", RTE_MAX_RXTX_INTR_VEC_ID); priv_rx_intr_vec_disable(priv); return -rte_errno; } fd = rxq->channel->fd; flags = fcntl(fd, F_GETFL); rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK); if (rc < 0) { rte_errno = errno; ERROR("failed to make Rx interrupt file descriptor" " %d non-blocking for queue index %d", fd, i); priv_rx_intr_vec_disable(priv); return -rte_errno; } intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count; intr_handle->efds[count] = fd; count++; } if (!count) priv_rx_intr_vec_disable(priv); else intr_handle->nb_efd = count; return 0; } /** * Clean up Rx interrupts handler. * * @param priv * Pointer to private structure. */ static void priv_rx_intr_vec_disable(struct priv *priv) { struct rte_intr_handle *intr_handle = priv->dev->intr_handle; rte_intr_free_epoll_fd(intr_handle); free(intr_handle->intr_vec); intr_handle->nb_efd = 0; intr_handle->intr_vec = NULL; } /** * DPDK callback for Rx queue interrupt enable. * * @param dev * Pointer to Ethernet device structure. * @param idx * Rx queue index. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx) { struct priv *priv = dev->data->dev_private; struct rxq *rxq = (*priv->rxqs)[idx]; int ret; if (!rxq || !rxq->channel) ret = EINVAL; else ret = ibv_req_notify_cq(rxq->cq, 0); if (ret) { rte_errno = ret; WARN("unable to arm interrupt on rx queue %d", idx); } return -ret; } /** * DPDK callback for Rx queue interrupt disable. * * @param dev * Pointer to Ethernet device structure. * @param idx * Rx queue index. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_rx_intr_disable(struct rte_eth_dev *dev, uint16_t idx) { struct priv *priv = dev->data->dev_private; struct rxq *rxq = (*priv->rxqs)[idx]; struct ibv_cq *ev_cq; void *ev_ctx; int ret; if (!rxq || !rxq->channel) { ret = EINVAL; } else { ret = ibv_get_cq_event(rxq->cq->channel, &ev_cq, &ev_ctx); if (ret || ev_cq != rxq->cq) ret = EINVAL; } if (ret) { rte_errno = ret; WARN("unable to disable interrupt on rx queue %d", idx); } else { ibv_ack_cq_events(rxq->cq, 1); } return -ret; } /** * Verify and store value for device argument. * * @param[in] key * Key argument to verify. * @param[in] val * Value associated with key. * @param[in, out] conf * Shared configuration data. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf) { unsigned long tmp; errno = 0; tmp = strtoul(val, NULL, 0); if (errno) { rte_errno = errno; WARN("%s: \"%s\" is not a valid integer", key, val); return -rte_errno; } if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) { uint32_t ports = rte_log2_u32(conf->ports.present); if (tmp >= ports) { ERROR("port index %lu outside range [0,%" PRIu32 ")", tmp, ports); return -EINVAL; } if (!(conf->ports.present & (1 << tmp))) { rte_errno = EINVAL; ERROR("invalid port index %lu", tmp); return -rte_errno; } conf->ports.enabled |= 1 << tmp; } else { rte_errno = EINVAL; WARN("%s: unknown parameter", key); return -rte_errno; } return 0; } /** * Parse device parameters. * * @param devargs * Device arguments structure. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf) { struct rte_kvargs *kvlist; unsigned int arg_count; int ret = 0; int i; if (devargs == NULL) return 0; kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params); if (kvlist == NULL) { rte_errno = EINVAL; ERROR("failed to parse kvargs"); return -rte_errno; } /* Process parameters. */ for (i = 0; pmd_mlx4_init_params[i]; ++i) { arg_count = rte_kvargs_count(kvlist, MLX4_PMD_PORT_KVARG); while (arg_count-- > 0) { ret = rte_kvargs_process(kvlist, MLX4_PMD_PORT_KVARG, (int (*)(const char *, const char *, void *)) mlx4_arg_parse, conf); if (ret != 0) goto free_kvlist; } } free_kvlist: rte_kvargs_free(kvlist); return ret; } static struct rte_pci_driver mlx4_driver; /** * DPDK callback to register a PCI device. * * This function creates an Ethernet device for each port of a given * PCI device. * * @param[in] pci_drv * PCI driver structure (mlx4_driver). * @param[in] pci_dev * PCI device information. * * @return * 0 on success, negative errno value otherwise and rte_errno is set. */ static int mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) { struct ibv_device **list; struct ibv_device *ibv_dev; int err = 0; struct ibv_context *attr_ctx = NULL; struct ibv_device_attr device_attr; struct mlx4_conf conf = { .ports.present = 0, }; unsigned int vf; int i; (void)pci_drv; assert(pci_drv == &mlx4_driver); list = ibv_get_device_list(&i); if (list == NULL) { rte_errno = errno; assert(rte_errno); if (rte_errno == ENOSYS) ERROR("cannot list devices, is ib_uverbs loaded?"); return -rte_errno; } assert(i >= 0); /* * For each listed device, check related sysfs entry against * the provided PCI ID. */ while (i != 0) { struct rte_pci_addr pci_addr; --i; DEBUG("checking device \"%s\"", list[i]->name); if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr)) continue; if ((pci_dev->addr.domain != pci_addr.domain) || (pci_dev->addr.bus != pci_addr.bus) || (pci_dev->addr.devid != pci_addr.devid) || (pci_dev->addr.function != pci_addr.function)) continue; vf = (pci_dev->id.device_id == PCI_DEVICE_ID_MELLANOX_CONNECTX3VF); INFO("PCI information matches, using device \"%s\" (VF: %s)", list[i]->name, (vf ? "true" : "false")); attr_ctx = ibv_open_device(list[i]); err = errno; break; } if (attr_ctx == NULL) { ibv_free_device_list(list); switch (err) { case 0: rte_errno = ENODEV; ERROR("cannot access device, is mlx4_ib loaded?"); return -rte_errno; case EINVAL: rte_errno = EINVAL; ERROR("cannot use device, are drivers up to date?"); return -rte_errno; } assert(err > 0); rte_errno = err; return -rte_errno; } ibv_dev = list[i]; DEBUG("device opened"); if (ibv_query_device(attr_ctx, &device_attr)) { rte_errno = ENODEV; goto error; } INFO("%u port(s) detected", device_attr.phys_port_cnt); conf.ports.present |= (UINT64_C(1) << device_attr.phys_port_cnt) - 1; if (mlx4_args(pci_dev->device.devargs, &conf)) { ERROR("failed to process device arguments"); rte_errno = EINVAL; goto error; } /* Use all ports when none are defined */ if (!conf.ports.enabled) conf.ports.enabled = conf.ports.present; for (i = 0; i < device_attr.phys_port_cnt; i++) { uint32_t port = i + 1; /* ports are indexed from one */ struct ibv_context *ctx = NULL; struct ibv_port_attr port_attr; struct ibv_pd *pd = NULL; struct priv *priv = NULL; struct rte_eth_dev *eth_dev = NULL; struct ether_addr mac; /* If port is not enabled, skip. */ if (!(conf.ports.enabled & (1 << i))) continue; DEBUG("using port %u", port); ctx = ibv_open_device(ibv_dev); if (ctx == NULL) { rte_errno = ENODEV; goto port_error; } /* Check port status. */ err = ibv_query_port(ctx, port, &port_attr); if (err) { rte_errno = err; ERROR("port query failed: %s", strerror(rte_errno)); goto port_error; } if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) { rte_errno = ENOTSUP; ERROR("port %d is not configured in Ethernet mode", port); goto port_error; } if (port_attr.state != IBV_PORT_ACTIVE) DEBUG("port %d is not active: \"%s\" (%d)", port, ibv_port_state_str(port_attr.state), port_attr.state); /* Allocate protection domain. */ pd = ibv_alloc_pd(ctx); if (pd == NULL) { rte_errno = ENOMEM; ERROR("PD allocation failure"); goto port_error; } /* from rte_ethdev.c */ priv = rte_zmalloc("ethdev private structure", sizeof(*priv), RTE_CACHE_LINE_SIZE); if (priv == NULL) { rte_errno = ENOMEM; ERROR("priv allocation failure"); goto port_error; } priv->ctx = ctx; priv->device_attr = device_attr; priv->port = port; priv->pd = pd; priv->mtu = ETHER_MTU; priv->vf = vf; /* Configure the first MAC address by default. */ if (priv_get_mac(priv, &mac.addr_bytes)) { ERROR("cannot get MAC address, is mlx4_en loaded?" " (rte_errno: %s)", strerror(rte_errno)); goto port_error; } INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x", priv->port, mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2], mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]); /* Register MAC address. */ priv->mac = mac; if (priv_mac_addr_add(priv)) goto port_error; #ifndef NDEBUG { char ifname[IF_NAMESIZE]; if (priv_get_ifname(priv, &ifname) == 0) DEBUG("port %u ifname is \"%s\"", priv->port, ifname); else DEBUG("port %u ifname is unknown", priv->port); } #endif /* Get actual MTU if possible. */ priv_get_mtu(priv, &priv->mtu); DEBUG("port %u MTU is %u", priv->port, priv->mtu); /* from rte_ethdev.c */ { char name[RTE_ETH_NAME_MAX_LEN]; snprintf(name, sizeof(name), "%s port %u", ibv_get_device_name(ibv_dev), port); eth_dev = rte_eth_dev_allocate(name); } if (eth_dev == NULL) { ERROR("can not allocate rte ethdev"); rte_errno = ENOMEM; goto port_error; } eth_dev->data->dev_private = priv; eth_dev->data->mac_addrs = &priv->mac; eth_dev->device = &pci_dev->device; rte_eth_copy_pci_info(eth_dev, pci_dev); eth_dev->device->driver = &mlx4_driver.driver; /* * Copy and override interrupt handle to prevent it from * being shared between all ethdev instances of a given PCI * device. This is required to properly handle Rx interrupts * on all ports. */ priv->intr_handle_dev = *eth_dev->intr_handle; eth_dev->intr_handle = &priv->intr_handle_dev; priv->dev = eth_dev; eth_dev->dev_ops = &mlx4_dev_ops; eth_dev->data->dev_flags |= RTE_ETH_DEV_DETACHABLE; /* Bring Ethernet device up. */ DEBUG("forcing Ethernet interface up"); priv_set_flags(priv, ~IFF_UP, IFF_UP); /* Update link status once if waiting for LSC. */ if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) mlx4_link_update(eth_dev, 0); continue; port_error: rte_free(priv); if (pd) claim_zero(ibv_dealloc_pd(pd)); if (ctx) claim_zero(ibv_close_device(ctx)); if (eth_dev) rte_eth_dev_release_port(eth_dev); break; } if (i == device_attr.phys_port_cnt) return 0; /* * XXX if something went wrong in the loop above, there is a resource * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as * long as the dpdk does not provide a way to deallocate a ethdev and a * way to enumerate the registered ethdevs to free the previous ones. */ error: if (attr_ctx) claim_zero(ibv_close_device(attr_ctx)); if (list) ibv_free_device_list(list); assert(rte_errno >= 0); return -rte_errno; } static const struct rte_pci_id mlx4_pci_id_map[] = { { RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_CONNECTX3) }, { RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO) }, { RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX, PCI_DEVICE_ID_MELLANOX_CONNECTX3VF) }, { .vendor_id = 0 } }; static struct rte_pci_driver mlx4_driver = { .driver = { .name = MLX4_DRIVER_NAME }, .id_table = mlx4_pci_id_map, .probe = mlx4_pci_probe, .drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_INTR_RMV, }; /** * Driver initialization routine. */ RTE_INIT(rte_mlx4_pmd_init); static void rte_mlx4_pmd_init(void) { /* * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use * huge pages. Calling ibv_fork_init() during init allows * applications to use fork() safely for purposes other than * using this PMD, which is not supported in forked processes. */ setenv("RDMAV_HUGEPAGES_SAFE", "1", 1); ibv_fork_init(); rte_pci_register(&mlx4_driver); } RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__); RTE_PMD_REGISTER_PCI_TABLE(net_mlx4, mlx4_pci_id_map); RTE_PMD_REGISTER_KMOD_DEP(net_mlx4, "* ib_uverbs & mlx4_en & mlx4_core & mlx4_ib");