/*- * BSD LICENSE * * Copyright 2017 6WIND S.A. * Copyright 2017 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. */ /** * @file * Flow API operations for mlx4 driver. */ #include #include #include #include #include #include #include #include /* Verbs headers do not support -pedantic. */ #ifdef PEDANTIC #pragma GCC diagnostic ignored "-Wpedantic" #endif #include #ifdef PEDANTIC #pragma GCC diagnostic error "-Wpedantic" #endif #include #include #include #include #include #include #include #include /* PMD headers. */ #include "mlx4.h" #include "mlx4_flow.h" #include "mlx4_rxtx.h" #include "mlx4_utils.h" /** Static initializer for a list of subsequent item types. */ #define NEXT_ITEM(...) \ (const enum rte_flow_item_type []){ \ __VA_ARGS__, RTE_FLOW_ITEM_TYPE_END, \ } /** Processor structure associated with a flow item. */ struct mlx4_flow_proc_item { /** Bit-mask for fields supported by this PMD. */ const void *mask_support; /** Bit-mask to use when @p item->mask is not provided. */ const void *mask_default; /** Size in bytes for @p mask_support and @p mask_default. */ const unsigned int mask_sz; /** Merge a pattern item into a flow rule handle. */ int (*merge)(struct rte_flow *flow, const struct rte_flow_item *item, const struct mlx4_flow_proc_item *proc, struct rte_flow_error *error); /** Size in bytes of the destination structure. */ const unsigned int dst_sz; /** List of possible subsequent items. */ const enum rte_flow_item_type *const next_item; }; /** Shared resources for drop flow rules. */ struct mlx4_drop { struct ibv_qp *qp; /**< QP target. */ struct ibv_cq *cq; /**< CQ associated with above QP. */ struct priv *priv; /**< Back pointer to private data. */ uint32_t refcnt; /**< Reference count. */ }; /** * Convert DPDK RSS hash fields to their Verbs equivalent. * * @param rss_hf * Hash fields in DPDK format (see struct rte_eth_rss_conf). * * @return * A valid Verbs RSS hash fields mask for mlx4 on success, (uint64_t)-1 * otherwise and rte_errno is set. */ static uint64_t mlx4_conv_rss_hf(uint64_t rss_hf) { enum { IPV4, IPV6, TCP, UDP, }; const uint64_t in[] = { [IPV4] = (ETH_RSS_IPV4 | ETH_RSS_FRAG_IPV4 | ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_NONFRAG_IPV4_UDP | ETH_RSS_NONFRAG_IPV4_OTHER), [IPV6] = (ETH_RSS_IPV6 | ETH_RSS_FRAG_IPV6 | ETH_RSS_NONFRAG_IPV6_TCP | ETH_RSS_NONFRAG_IPV6_UDP | ETH_RSS_NONFRAG_IPV6_OTHER | ETH_RSS_IPV6_EX | ETH_RSS_IPV6_TCP_EX | ETH_RSS_IPV6_UDP_EX), [TCP] = (ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_NONFRAG_IPV6_TCP | ETH_RSS_IPV6_TCP_EX), /* * UDP support is temporarily disabled due to an * implementation issue in the kernel. */ [UDP] = 0, }; const uint64_t out[RTE_DIM(in)] = { [IPV4] = IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4, [IPV6] = IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6, [TCP] = IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP, [UDP] = IBV_RX_HASH_SRC_PORT_UDP | IBV_RX_HASH_DST_PORT_UDP, }; uint64_t seen = 0; uint64_t conv = 0; unsigned int i; for (i = 0; i != RTE_DIM(in); ++i) if (rss_hf & in[i]) { seen |= rss_hf & in[i]; conv |= out[i]; } if (!(rss_hf & ~seen)) return conv; rte_errno = ENOTSUP; return (uint64_t)-1; } /** * Merge Ethernet pattern item into flow rule handle. * * Additional mlx4-specific constraints on supported fields: * * - No support for partial masks, except in the specific case of matching * all multicast traffic (@p spec->dst and @p mask->dst equal to * 01:00:00:00:00:00). * - Not providing @p item->spec or providing an empty @p mask->dst is * *only* supported if the rule doesn't specify additional matching * criteria (i.e. rule is promiscuous-like). * * @param[in, out] flow * Flow rule handle to update. * @param[in] item * Pattern item to merge. * @param[in] proc * Associated item-processing object. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_merge_eth(struct rte_flow *flow, const struct rte_flow_item *item, const struct mlx4_flow_proc_item *proc, struct rte_flow_error *error) { const struct rte_flow_item_eth *spec = item->spec; const struct rte_flow_item_eth *mask = spec ? (item->mask ? item->mask : proc->mask_default) : NULL; struct ibv_flow_spec_eth *eth; const char *msg; unsigned int i; if (!mask) { flow->promisc = 1; } else { uint32_t sum_dst = 0; uint32_t sum_src = 0; for (i = 0; i != sizeof(mask->dst.addr_bytes); ++i) { sum_dst += mask->dst.addr_bytes[i]; sum_src += mask->src.addr_bytes[i]; } if (sum_src) { msg = "mlx4 does not support source MAC matching"; goto error; } else if (!sum_dst) { flow->promisc = 1; } else if (sum_dst == 1 && mask->dst.addr_bytes[0] == 1) { if (!(spec->dst.addr_bytes[0] & 1)) { msg = "mlx4 does not support the explicit" " exclusion of all multicast traffic"; goto error; } flow->allmulti = 1; } else if (sum_dst != (UINT8_C(0xff) * ETHER_ADDR_LEN)) { msg = "mlx4 does not support matching partial" " Ethernet fields"; goto error; } } if (!flow->ibv_attr) return 0; if (flow->promisc) { flow->ibv_attr->type = IBV_FLOW_ATTR_ALL_DEFAULT; return 0; } if (flow->allmulti) { flow->ibv_attr->type = IBV_FLOW_ATTR_MC_DEFAULT; return 0; } ++flow->ibv_attr->num_of_specs; eth = (void *)((uintptr_t)flow->ibv_attr + flow->ibv_attr_size); *eth = (struct ibv_flow_spec_eth) { .type = IBV_FLOW_SPEC_ETH, .size = sizeof(*eth), }; memcpy(eth->val.dst_mac, spec->dst.addr_bytes, ETHER_ADDR_LEN); memcpy(eth->mask.dst_mac, mask->dst.addr_bytes, ETHER_ADDR_LEN); /* Remove unwanted bits from values. */ for (i = 0; i < ETHER_ADDR_LEN; ++i) { eth->val.dst_mac[i] &= eth->mask.dst_mac[i]; } return 0; error: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, msg); } /** * Merge VLAN pattern item into flow rule handle. * * Additional mlx4-specific constraints on supported fields: * * - Matching *all* VLAN traffic by omitting @p item->spec or providing an * empty @p item->mask would also include non-VLAN traffic. Doing so is * therefore unsupported. * - No support for partial masks. * * @param[in, out] flow * Flow rule handle to update. * @param[in] item * Pattern item to merge. * @param[in] proc * Associated item-processing object. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_merge_vlan(struct rte_flow *flow, const struct rte_flow_item *item, const struct mlx4_flow_proc_item *proc, struct rte_flow_error *error) { const struct rte_flow_item_vlan *spec = item->spec; const struct rte_flow_item_vlan *mask = spec ? (item->mask ? item->mask : proc->mask_default) : NULL; struct ibv_flow_spec_eth *eth; const char *msg; if (!mask || !mask->tci) { msg = "mlx4 cannot match all VLAN traffic while excluding" " non-VLAN traffic, TCI VID must be specified"; goto error; } if (mask->tci != RTE_BE16(0x0fff)) { msg = "mlx4 does not support partial TCI VID matching"; goto error; } if (!flow->ibv_attr) return 0; eth = (void *)((uintptr_t)flow->ibv_attr + flow->ibv_attr_size - sizeof(*eth)); eth->val.vlan_tag = spec->tci; eth->mask.vlan_tag = mask->tci; eth->val.vlan_tag &= eth->mask.vlan_tag; return 0; error: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, msg); } /** * Merge IPv4 pattern item into flow rule handle. * * Additional mlx4-specific constraints on supported fields: * * - No support for partial masks. * * @param[in, out] flow * Flow rule handle to update. * @param[in] item * Pattern item to merge. * @param[in] proc * Associated item-processing object. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_merge_ipv4(struct rte_flow *flow, const struct rte_flow_item *item, const struct mlx4_flow_proc_item *proc, struct rte_flow_error *error) { const struct rte_flow_item_ipv4 *spec = item->spec; const struct rte_flow_item_ipv4 *mask = spec ? (item->mask ? item->mask : proc->mask_default) : NULL; struct ibv_flow_spec_ipv4 *ipv4; const char *msg; if (mask && ((uint32_t)(mask->hdr.src_addr + 1) > UINT32_C(1) || (uint32_t)(mask->hdr.dst_addr + 1) > UINT32_C(1))) { msg = "mlx4 does not support matching partial IPv4 fields"; goto error; } if (!flow->ibv_attr) return 0; ++flow->ibv_attr->num_of_specs; ipv4 = (void *)((uintptr_t)flow->ibv_attr + flow->ibv_attr_size); *ipv4 = (struct ibv_flow_spec_ipv4) { .type = IBV_FLOW_SPEC_IPV4, .size = sizeof(*ipv4), }; if (!spec) return 0; ipv4->val = (struct ibv_flow_ipv4_filter) { .src_ip = spec->hdr.src_addr, .dst_ip = spec->hdr.dst_addr, }; ipv4->mask = (struct ibv_flow_ipv4_filter) { .src_ip = mask->hdr.src_addr, .dst_ip = mask->hdr.dst_addr, }; /* Remove unwanted bits from values. */ ipv4->val.src_ip &= ipv4->mask.src_ip; ipv4->val.dst_ip &= ipv4->mask.dst_ip; return 0; error: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, msg); } /** * Merge UDP pattern item into flow rule handle. * * Additional mlx4-specific constraints on supported fields: * * - No support for partial masks. * * @param[in, out] flow * Flow rule handle to update. * @param[in] item * Pattern item to merge. * @param[in] proc * Associated item-processing object. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_merge_udp(struct rte_flow *flow, const struct rte_flow_item *item, const struct mlx4_flow_proc_item *proc, struct rte_flow_error *error) { const struct rte_flow_item_udp *spec = item->spec; const struct rte_flow_item_udp *mask = spec ? (item->mask ? item->mask : proc->mask_default) : NULL; struct ibv_flow_spec_tcp_udp *udp; const char *msg; if (mask && ((uint16_t)(mask->hdr.src_port + 1) > UINT16_C(1) || (uint16_t)(mask->hdr.dst_port + 1) > UINT16_C(1))) { msg = "mlx4 does not support matching partial UDP fields"; goto error; } if (!flow->ibv_attr) return 0; ++flow->ibv_attr->num_of_specs; udp = (void *)((uintptr_t)flow->ibv_attr + flow->ibv_attr_size); *udp = (struct ibv_flow_spec_tcp_udp) { .type = IBV_FLOW_SPEC_UDP, .size = sizeof(*udp), }; if (!spec) return 0; udp->val.dst_port = spec->hdr.dst_port; udp->val.src_port = spec->hdr.src_port; udp->mask.dst_port = mask->hdr.dst_port; udp->mask.src_port = mask->hdr.src_port; /* Remove unwanted bits from values. */ udp->val.src_port &= udp->mask.src_port; udp->val.dst_port &= udp->mask.dst_port; return 0; error: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, msg); } /** * Merge TCP pattern item into flow rule handle. * * Additional mlx4-specific constraints on supported fields: * * - No support for partial masks. * * @param[in, out] flow * Flow rule handle to update. * @param[in] item * Pattern item to merge. * @param[in] proc * Associated item-processing object. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_merge_tcp(struct rte_flow *flow, const struct rte_flow_item *item, const struct mlx4_flow_proc_item *proc, struct rte_flow_error *error) { const struct rte_flow_item_tcp *spec = item->spec; const struct rte_flow_item_tcp *mask = spec ? (item->mask ? item->mask : proc->mask_default) : NULL; struct ibv_flow_spec_tcp_udp *tcp; const char *msg; if (mask && ((uint16_t)(mask->hdr.src_port + 1) > UINT16_C(1) || (uint16_t)(mask->hdr.dst_port + 1) > UINT16_C(1))) { msg = "mlx4 does not support matching partial TCP fields"; goto error; } if (!flow->ibv_attr) return 0; ++flow->ibv_attr->num_of_specs; tcp = (void *)((uintptr_t)flow->ibv_attr + flow->ibv_attr_size); *tcp = (struct ibv_flow_spec_tcp_udp) { .type = IBV_FLOW_SPEC_TCP, .size = sizeof(*tcp), }; if (!spec) return 0; tcp->val.dst_port = spec->hdr.dst_port; tcp->val.src_port = spec->hdr.src_port; tcp->mask.dst_port = mask->hdr.dst_port; tcp->mask.src_port = mask->hdr.src_port; /* Remove unwanted bits from values. */ tcp->val.src_port &= tcp->mask.src_port; tcp->val.dst_port &= tcp->mask.dst_port; return 0; error: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, msg); } /** * Perform basic sanity checks on a pattern item. * * @param[in] item * Item specification. * @param[in] proc * Associated item-processing object. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_item_check(const struct rte_flow_item *item, const struct mlx4_flow_proc_item *proc, struct rte_flow_error *error) { const uint8_t *mask; unsigned int i; /* item->last and item->mask cannot exist without item->spec. */ if (!item->spec && (item->mask || item->last)) return rte_flow_error_set (error, EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, item, "\"mask\" or \"last\" field provided without a" " corresponding \"spec\""); /* No spec, no mask, no problem. */ if (!item->spec) return 0; mask = item->mask ? (const uint8_t *)item->mask : (const uint8_t *)proc->mask_default; assert(mask); /* * Single-pass check to make sure that: * - Mask is supported, no bits are set outside proc->mask_support. * - Both item->spec and item->last are included in mask. */ for (i = 0; i != proc->mask_sz; ++i) { if (!mask[i]) continue; if ((mask[i] | ((const uint8_t *)proc->mask_support)[i]) != ((const uint8_t *)proc->mask_support)[i]) return rte_flow_error_set (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, "unsupported field found in \"mask\""); if (item->last && (((const uint8_t *)item->spec)[i] & mask[i]) != (((const uint8_t *)item->last)[i] & mask[i])) return rte_flow_error_set (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, "range between \"spec\" and \"last\"" " is larger than \"mask\""); } return 0; } /** Graph of supported items and associated actions. */ static const struct mlx4_flow_proc_item mlx4_flow_proc_item_list[] = { [RTE_FLOW_ITEM_TYPE_END] = { .next_item = NEXT_ITEM(RTE_FLOW_ITEM_TYPE_ETH), }, [RTE_FLOW_ITEM_TYPE_ETH] = { .next_item = NEXT_ITEM(RTE_FLOW_ITEM_TYPE_VLAN, RTE_FLOW_ITEM_TYPE_IPV4), .mask_support = &(const struct rte_flow_item_eth){ /* Only destination MAC can be matched. */ .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", }, .mask_default = &rte_flow_item_eth_mask, .mask_sz = sizeof(struct rte_flow_item_eth), .merge = mlx4_flow_merge_eth, .dst_sz = sizeof(struct ibv_flow_spec_eth), }, [RTE_FLOW_ITEM_TYPE_VLAN] = { .next_item = NEXT_ITEM(RTE_FLOW_ITEM_TYPE_IPV4), .mask_support = &(const struct rte_flow_item_vlan){ /* Only TCI VID matching is supported. */ .tci = RTE_BE16(0x0fff), }, .mask_default = &rte_flow_item_vlan_mask, .mask_sz = sizeof(struct rte_flow_item_vlan), .merge = mlx4_flow_merge_vlan, .dst_sz = 0, }, [RTE_FLOW_ITEM_TYPE_IPV4] = { .next_item = NEXT_ITEM(RTE_FLOW_ITEM_TYPE_UDP, RTE_FLOW_ITEM_TYPE_TCP), .mask_support = &(const struct rte_flow_item_ipv4){ .hdr = { .src_addr = RTE_BE32(0xffffffff), .dst_addr = RTE_BE32(0xffffffff), }, }, .mask_default = &rte_flow_item_ipv4_mask, .mask_sz = sizeof(struct rte_flow_item_ipv4), .merge = mlx4_flow_merge_ipv4, .dst_sz = sizeof(struct ibv_flow_spec_ipv4), }, [RTE_FLOW_ITEM_TYPE_UDP] = { .mask_support = &(const struct rte_flow_item_udp){ .hdr = { .src_port = RTE_BE16(0xffff), .dst_port = RTE_BE16(0xffff), }, }, .mask_default = &rte_flow_item_udp_mask, .mask_sz = sizeof(struct rte_flow_item_udp), .merge = mlx4_flow_merge_udp, .dst_sz = sizeof(struct ibv_flow_spec_tcp_udp), }, [RTE_FLOW_ITEM_TYPE_TCP] = { .mask_support = &(const struct rte_flow_item_tcp){ .hdr = { .src_port = RTE_BE16(0xffff), .dst_port = RTE_BE16(0xffff), }, }, .mask_default = &rte_flow_item_tcp_mask, .mask_sz = sizeof(struct rte_flow_item_tcp), .merge = mlx4_flow_merge_tcp, .dst_sz = sizeof(struct ibv_flow_spec_tcp_udp), }, }; /** * Make sure a flow rule is supported and initialize associated structure. * * @param priv * Pointer to private structure. * @param[in] attr * Flow rule attributes. * @param[in] pattern * Pattern specification (list terminated by the END pattern item). * @param[in] actions * Associated actions (list terminated by the END action). * @param[out] error * Perform verbose error reporting if not NULL. * @param[in, out] addr * Buffer where the resulting flow rule handle pointer must be stored. * If NULL, stop processing after validation stage. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_prepare(struct priv *priv, const struct rte_flow_attr *attr, const struct rte_flow_item pattern[], const struct rte_flow_action actions[], struct rte_flow_error *error, struct rte_flow **addr) { const struct rte_flow_item *item; const struct rte_flow_action *action; const struct mlx4_flow_proc_item *proc; struct rte_flow temp = { .ibv_attr_size = sizeof(*temp.ibv_attr) }; struct rte_flow *flow = &temp; const char *msg = NULL; if (attr->group) return rte_flow_error_set (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR_GROUP, NULL, "groups are not supported"); if (attr->priority > MLX4_FLOW_PRIORITY_LAST) return rte_flow_error_set (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, NULL, "maximum priority level is " MLX4_STR_EXPAND(MLX4_FLOW_PRIORITY_LAST)); if (attr->egress) return rte_flow_error_set (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, NULL, "egress is not supported"); if (!attr->ingress) return rte_flow_error_set (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, NULL, "only ingress is supported"); fill: proc = mlx4_flow_proc_item_list; /* Go over pattern. */ for (item = pattern; item->type; ++item) { const struct mlx4_flow_proc_item *next = NULL; unsigned int i; int err; if (item->type == RTE_FLOW_ITEM_TYPE_VOID) continue; if (item->type == MLX4_FLOW_ITEM_TYPE_INTERNAL) { flow->internal = 1; continue; } if (flow->promisc || flow->allmulti) { msg = "mlx4 does not support additional matching" " criteria combined with indiscriminate" " matching on Ethernet headers"; goto exit_item_not_supported; } for (i = 0; proc->next_item && proc->next_item[i]; ++i) { if (proc->next_item[i] == item->type) { next = &mlx4_flow_proc_item_list[item->type]; break; } } if (!next) goto exit_item_not_supported; proc = next; /* * Perform basic sanity checks only once, while handle is * not allocated. */ if (flow == &temp) { err = mlx4_flow_item_check(item, proc, error); if (err) return err; } if (proc->merge) { err = proc->merge(flow, item, proc, error); if (err) return err; } flow->ibv_attr_size += proc->dst_sz; } /* Go over actions list. */ for (action = actions; action->type; ++action) { switch (action->type) { const struct rte_flow_action_queue *queue; const struct rte_flow_action_rss *rss; const struct rte_eth_rss_conf *rss_conf; unsigned int i; case RTE_FLOW_ACTION_TYPE_VOID: continue; case RTE_FLOW_ACTION_TYPE_DROP: flow->drop = 1; break; case RTE_FLOW_ACTION_TYPE_QUEUE: if (flow->rss) break; queue = action->conf; if (queue->index >= priv->dev->data->nb_rx_queues) { msg = "queue target index beyond number of" " configured Rx queues"; goto exit_action_not_supported; } flow->rss = mlx4_rss_get (priv, 0, mlx4_rss_hash_key_default, 1, &queue->index); if (!flow->rss) { msg = "not enough resources for additional" " single-queue RSS context"; goto exit_action_not_supported; } break; case RTE_FLOW_ACTION_TYPE_RSS: if (flow->rss) break; rss = action->conf; /* Default RSS configuration if none is provided. */ rss_conf = rss->rss_conf ? rss->rss_conf : &(struct rte_eth_rss_conf){ .rss_key = mlx4_rss_hash_key_default, .rss_key_len = MLX4_RSS_HASH_KEY_SIZE, .rss_hf = (ETH_RSS_IPV4 | ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_IPV6 | ETH_RSS_NONFRAG_IPV6_TCP), }; /* Sanity checks. */ for (i = 0; i < rss->num; ++i) if (rss->queue[i] >= priv->dev->data->nb_rx_queues) break; if (i != rss->num) { msg = "queue index target beyond number of" " configured Rx queues"; goto exit_action_not_supported; } if (!rte_is_power_of_2(rss->num)) { msg = "for RSS, mlx4 requires the number of" " queues to be a power of two"; goto exit_action_not_supported; } if (rss_conf->rss_key_len != sizeof(flow->rss->key)) { msg = "mlx4 supports exactly one RSS hash key" " length: " MLX4_STR_EXPAND(MLX4_RSS_HASH_KEY_SIZE); goto exit_action_not_supported; } for (i = 1; i < rss->num; ++i) if (rss->queue[i] - rss->queue[i - 1] != 1) break; if (i != rss->num) { msg = "mlx4 requires RSS contexts to use" " consecutive queue indices only"; goto exit_action_not_supported; } if (rss->queue[0] % rss->num) { msg = "mlx4 requires the first queue of a RSS" " context to be aligned on a multiple" " of the context size"; goto exit_action_not_supported; } flow->rss = mlx4_rss_get (priv, mlx4_conv_rss_hf(rss_conf->rss_hf), rss_conf->rss_key, rss->num, rss->queue); if (!flow->rss) { msg = "either invalid parameters or not enough" " resources for additional multi-queue" " RSS context"; goto exit_action_not_supported; } break; default: goto exit_action_not_supported; } } if (!flow->rss && !flow->drop) return rte_flow_error_set (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL, "no valid action"); /* Validation ends here. */ if (!addr) { if (flow->rss) mlx4_rss_put(flow->rss); return 0; } if (flow == &temp) { /* Allocate proper handle based on collected data. */ const struct mlx4_malloc_vec vec[] = { { .align = alignof(struct rte_flow), .size = sizeof(*flow), .addr = (void **)&flow, }, { .align = alignof(struct ibv_flow_attr), .size = temp.ibv_attr_size, .addr = (void **)&temp.ibv_attr, }, }; if (!mlx4_zmallocv(__func__, vec, RTE_DIM(vec))) return rte_flow_error_set (error, -rte_errno, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL, "flow rule handle allocation failure"); /* Most fields will be updated by second pass. */ *flow = (struct rte_flow){ .ibv_attr = temp.ibv_attr, .ibv_attr_size = sizeof(*flow->ibv_attr), .rss = temp.rss, }; *flow->ibv_attr = (struct ibv_flow_attr){ .type = IBV_FLOW_ATTR_NORMAL, .size = sizeof(*flow->ibv_attr), .priority = attr->priority, .port = priv->port, }; goto fill; } *addr = flow; return 0; exit_item_not_supported: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM, item, msg ? msg : "item not supported"); exit_action_not_supported: return rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, action, msg ? msg : "action not supported"); } /** * Validate a flow supported by the NIC. * * @see rte_flow_validate() * @see rte_flow_ops */ static int mlx4_flow_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr, const struct rte_flow_item pattern[], const struct rte_flow_action actions[], struct rte_flow_error *error) { struct priv *priv = dev->data->dev_private; return mlx4_flow_prepare(priv, attr, pattern, actions, error, NULL); } /** * Get a drop flow rule resources instance. * * @param priv * Pointer to private structure. * * @return * Pointer to drop flow resources on success, NULL otherwise and rte_errno * is set. */ static struct mlx4_drop * mlx4_drop_get(struct priv *priv) { struct mlx4_drop *drop = priv->drop; if (drop) { assert(drop->refcnt); assert(drop->priv == priv); ++drop->refcnt; return drop; } drop = rte_malloc(__func__, sizeof(*drop), 0); if (!drop) goto error; *drop = (struct mlx4_drop){ .priv = priv, .refcnt = 1, }; drop->cq = ibv_create_cq(priv->ctx, 1, NULL, NULL, 0); if (!drop->cq) goto error; drop->qp = ibv_create_qp(priv->pd, &(struct ibv_qp_init_attr){ .send_cq = drop->cq, .recv_cq = drop->cq, .qp_type = IBV_QPT_RAW_PACKET, }); if (!drop->qp) goto error; priv->drop = drop; return drop; error: if (drop->qp) claim_zero(ibv_destroy_qp(drop->qp)); if (drop->cq) claim_zero(ibv_destroy_cq(drop->cq)); if (drop) rte_free(drop); rte_errno = ENOMEM; return NULL; } /** * Give back a drop flow rule resources instance. * * @param drop * Pointer to drop flow rule resources. */ static void mlx4_drop_put(struct mlx4_drop *drop) { assert(drop->refcnt); if (--drop->refcnt) return; drop->priv->drop = NULL; claim_zero(ibv_destroy_qp(drop->qp)); claim_zero(ibv_destroy_cq(drop->cq)); rte_free(drop); } /** * Toggle a configured flow rule. * * @param priv * Pointer to private structure. * @param flow * Flow rule handle to toggle. * @param enable * Whether associated Verbs flow must be created or removed. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_toggle(struct priv *priv, struct rte_flow *flow, int enable, struct rte_flow_error *error) { struct ibv_qp *qp = NULL; const char *msg; int err; if (!enable) { if (!flow->ibv_flow) return 0; claim_zero(ibv_destroy_flow(flow->ibv_flow)); flow->ibv_flow = NULL; if (flow->drop) mlx4_drop_put(priv->drop); else if (flow->rss) mlx4_rss_detach(flow->rss); return 0; } assert(flow->ibv_attr); if (!flow->internal && !priv->isolated && flow->ibv_attr->priority == MLX4_FLOW_PRIORITY_LAST) { if (flow->ibv_flow) { claim_zero(ibv_destroy_flow(flow->ibv_flow)); flow->ibv_flow = NULL; if (flow->drop) mlx4_drop_put(priv->drop); else if (flow->rss) mlx4_rss_detach(flow->rss); } err = EACCES; msg = ("priority level " MLX4_STR_EXPAND(MLX4_FLOW_PRIORITY_LAST) " is reserved when not in isolated mode"); goto error; } if (flow->rss) { struct mlx4_rss *rss = flow->rss; int missing = 0; unsigned int i; /* Stop at the first nonexistent target queue. */ for (i = 0; i != rss->queues; ++i) if (rss->queue_id[i] >= priv->dev->data->nb_rx_queues || !priv->dev->data->rx_queues[rss->queue_id[i]]) { missing = 1; break; } if (flow->ibv_flow) { if (missing ^ !flow->drop) return 0; /* Verbs flow needs updating. */ claim_zero(ibv_destroy_flow(flow->ibv_flow)); flow->ibv_flow = NULL; if (flow->drop) mlx4_drop_put(priv->drop); else mlx4_rss_detach(rss); } if (!missing) { err = mlx4_rss_attach(rss); if (err) { err = -err; msg = "cannot create indirection table or hash" " QP to associate flow rule with"; goto error; } qp = rss->qp; } /* A missing target queue drops traffic implicitly. */ flow->drop = missing; } if (flow->drop) { if (flow->ibv_flow) return 0; mlx4_drop_get(priv); if (!priv->drop) { err = rte_errno; msg = "resources for drop flow rule cannot be created"; goto error; } qp = priv->drop->qp; } assert(qp); if (flow->ibv_flow) return 0; flow->ibv_flow = ibv_create_flow(qp, flow->ibv_attr); if (flow->ibv_flow) return 0; if (flow->drop) mlx4_drop_put(priv->drop); else if (flow->rss) mlx4_rss_detach(flow->rss); err = errno; msg = "flow rule rejected by device"; error: return rte_flow_error_set (error, err, RTE_FLOW_ERROR_TYPE_HANDLE, flow, msg); } /** * Create a flow. * * @see rte_flow_create() * @see rte_flow_ops */ static struct rte_flow * mlx4_flow_create(struct rte_eth_dev *dev, const struct rte_flow_attr *attr, const struct rte_flow_item pattern[], const struct rte_flow_action actions[], struct rte_flow_error *error) { struct priv *priv = dev->data->dev_private; struct rte_flow *flow; int err; err = mlx4_flow_prepare(priv, attr, pattern, actions, error, &flow); if (err) return NULL; err = mlx4_flow_toggle(priv, flow, priv->started, error); if (!err) { struct rte_flow *curr = LIST_FIRST(&priv->flows); /* New rules are inserted after internal ones. */ if (!curr || !curr->internal) { LIST_INSERT_HEAD(&priv->flows, flow, next); } else { while (LIST_NEXT(curr, next) && LIST_NEXT(curr, next)->internal) curr = LIST_NEXT(curr, next); LIST_INSERT_AFTER(curr, flow, next); } return flow; } if (flow->rss) mlx4_rss_put(flow->rss); rte_flow_error_set(error, -err, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL, error->message); rte_free(flow); return NULL; } /** * Configure isolated mode. * * @see rte_flow_isolate() * @see rte_flow_ops */ static int mlx4_flow_isolate(struct rte_eth_dev *dev, int enable, struct rte_flow_error *error) { struct priv *priv = dev->data->dev_private; if (!!enable == !!priv->isolated) return 0; priv->isolated = !!enable; if (mlx4_flow_sync(priv, error)) { priv->isolated = !enable; return -rte_errno; } return 0; } /** * Destroy a flow rule. * * @see rte_flow_destroy() * @see rte_flow_ops */ static int mlx4_flow_destroy(struct rte_eth_dev *dev, struct rte_flow *flow, struct rte_flow_error *error) { struct priv *priv = dev->data->dev_private; int err = mlx4_flow_toggle(priv, flow, 0, error); if (err) return err; LIST_REMOVE(flow, next); if (flow->rss) mlx4_rss_put(flow->rss); rte_free(flow); return 0; } /** * Destroy user-configured flow rules. * * This function skips internal flows rules. * * @see rte_flow_flush() * @see rte_flow_ops */ static int mlx4_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error) { struct priv *priv = dev->data->dev_private; struct rte_flow *flow = LIST_FIRST(&priv->flows); while (flow) { struct rte_flow *next = LIST_NEXT(flow, next); if (!flow->internal) mlx4_flow_destroy(dev, flow, error); flow = next; } return 0; } /** * Helper function to determine the next configured VLAN filter. * * @param priv * Pointer to private structure. * @param vlan * VLAN ID to use as a starting point. * * @return * Next configured VLAN ID or a high value (>= 4096) if there is none. */ static uint16_t mlx4_flow_internal_next_vlan(struct priv *priv, uint16_t vlan) { while (vlan < 4096) { if (priv->dev->data->vlan_filter_conf.ids[vlan / 64] & (UINT64_C(1) << (vlan % 64))) return vlan; ++vlan; } return vlan; } /** * Generate internal flow rules. * * Various flow rules are created depending on the mode the device is in: * * 1. Promiscuous: port MAC + catch-all (VLAN filtering is ignored). * 2. All multicast: port MAC/VLAN + catch-all multicast. * 3. Otherwise: port MAC/VLAN + broadcast MAC/VLAN. * * About MAC flow rules: * * - MAC flow rules are generated from @p dev->data->mac_addrs * (@p priv->mac array). * - An additional flow rule for Ethernet broadcasts is also generated. * - All these are per-VLAN if @p dev->data->dev_conf.rxmode.hw_vlan_filter * is enabled and VLAN filters are configured. * * @param priv * Pointer to private structure. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ static int mlx4_flow_internal(struct priv *priv, struct rte_flow_error *error) { struct rte_flow_attr attr = { .priority = MLX4_FLOW_PRIORITY_LAST, .ingress = 1, }; struct rte_flow_item_eth eth_spec; const struct rte_flow_item_eth eth_mask = { .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff", }; const struct rte_flow_item_eth eth_allmulti = { .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00", }; struct rte_flow_item_vlan vlan_spec; const struct rte_flow_item_vlan vlan_mask = { .tci = RTE_BE16(0x0fff), }; struct rte_flow_item pattern[] = { { .type = MLX4_FLOW_ITEM_TYPE_INTERNAL, }, { .type = RTE_FLOW_ITEM_TYPE_ETH, .spec = ð_spec, .mask = ð_mask, }, { /* Replaced with VLAN if filtering is enabled. */ .type = RTE_FLOW_ITEM_TYPE_END, }, { .type = RTE_FLOW_ITEM_TYPE_END, }, }; /* * Round number of queues down to their previous power of 2 to * comply with RSS context limitations. Extra queues silently do not * get RSS by default. */ uint32_t queues = rte_align32pow2(priv->dev->data->nb_rx_queues + 1) >> 1; alignas(struct rte_flow_action_rss) uint8_t rss_conf_data [offsetof(struct rte_flow_action_rss, queue) + sizeof(((struct rte_flow_action_rss *)0)->queue[0]) * queues]; struct rte_flow_action_rss *rss_conf = (void *)rss_conf_data; struct rte_flow_action actions[] = { { .type = RTE_FLOW_ACTION_TYPE_RSS, .conf = rss_conf, }, { .type = RTE_FLOW_ACTION_TYPE_END, }, }; struct ether_addr *rule_mac = ð_spec.dst; rte_be16_t *rule_vlan = priv->dev->data->dev_conf.rxmode.hw_vlan_filter && !priv->dev->data->promiscuous ? &vlan_spec.tci : NULL; int broadcast = !priv->dev->data->promiscuous && !priv->dev->data->all_multicast; uint16_t vlan = 0; struct rte_flow *flow; unsigned int i; int err = 0; /* Nothing to be done if there are no Rx queues. */ if (!queues) goto error; /* Prepare default RSS configuration. */ *rss_conf = (struct rte_flow_action_rss){ .rss_conf = NULL, /* Rely on default fallback settings. */ .num = queues, }; for (i = 0; i != queues; ++i) rss_conf->queue[i] = i; /* * Set up VLAN item if filtering is enabled and at least one VLAN * filter is configured. */ if (rule_vlan) { vlan = mlx4_flow_internal_next_vlan(priv, 0); if (vlan < 4096) { pattern[2] = (struct rte_flow_item){ .type = RTE_FLOW_ITEM_TYPE_VLAN, .spec = &vlan_spec, .mask = &vlan_mask, }; next_vlan: *rule_vlan = rte_cpu_to_be_16(vlan); } else { rule_vlan = NULL; } } for (i = 0; i != RTE_DIM(priv->mac) + broadcast; ++i) { const struct ether_addr *mac; /* Broadcasts are handled by an extra iteration. */ if (i < RTE_DIM(priv->mac)) mac = &priv->mac[i]; else mac = ð_mask.dst; if (is_zero_ether_addr(mac)) continue; /* Check if MAC flow rule is already present. */ for (flow = LIST_FIRST(&priv->flows); flow && flow->internal; flow = LIST_NEXT(flow, next)) { const struct ibv_flow_spec_eth *eth = (const void *)((uintptr_t)flow->ibv_attr + sizeof(*flow->ibv_attr)); unsigned int j; if (!flow->mac) continue; assert(flow->ibv_attr->type == IBV_FLOW_ATTR_NORMAL); assert(flow->ibv_attr->num_of_specs == 1); assert(eth->type == IBV_FLOW_SPEC_ETH); assert(flow->rss); if (rule_vlan && (eth->val.vlan_tag != *rule_vlan || eth->mask.vlan_tag != RTE_BE16(0x0fff))) continue; if (!rule_vlan && eth->mask.vlan_tag) continue; for (j = 0; j != sizeof(mac->addr_bytes); ++j) if (eth->val.dst_mac[j] != mac->addr_bytes[j] || eth->mask.dst_mac[j] != UINT8_C(0xff) || eth->val.src_mac[j] != UINT8_C(0x00) || eth->mask.src_mac[j] != UINT8_C(0x00)) break; if (j != sizeof(mac->addr_bytes)) continue; if (flow->rss->queues != queues || memcmp(flow->rss->queue_id, rss_conf->queue, queues * sizeof(flow->rss->queue_id[0]))) continue; break; } if (!flow || !flow->internal) { /* Not found, create a new flow rule. */ memcpy(rule_mac, mac, sizeof(*mac)); flow = mlx4_flow_create(priv->dev, &attr, pattern, actions, error); if (!flow) { err = -rte_errno; goto error; } } flow->select = 1; flow->mac = 1; } if (rule_vlan) { vlan = mlx4_flow_internal_next_vlan(priv, vlan + 1); if (vlan < 4096) goto next_vlan; } /* Take care of promiscuous and all multicast flow rules. */ if (!broadcast) { for (flow = LIST_FIRST(&priv->flows); flow && flow->internal; flow = LIST_NEXT(flow, next)) { if (priv->dev->data->promiscuous) { if (flow->promisc) break; } else { assert(priv->dev->data->all_multicast); if (flow->allmulti) break; } } if (flow && flow->internal) { assert(flow->rss); if (flow->rss->queues != queues || memcmp(flow->rss->queue_id, rss_conf->queue, queues * sizeof(flow->rss->queue_id[0]))) flow = NULL; } if (!flow || !flow->internal) { /* Not found, create a new flow rule. */ if (priv->dev->data->promiscuous) { pattern[1].spec = NULL; pattern[1].mask = NULL; } else { assert(priv->dev->data->all_multicast); pattern[1].spec = ð_allmulti; pattern[1].mask = ð_allmulti; } pattern[2] = pattern[3]; flow = mlx4_flow_create(priv->dev, &attr, pattern, actions, error); if (!flow) { err = -rte_errno; goto error; } } assert(flow->promisc || flow->allmulti); flow->select = 1; } error: /* Clear selection and clean up stale internal flow rules. */ flow = LIST_FIRST(&priv->flows); while (flow && flow->internal) { struct rte_flow *next = LIST_NEXT(flow, next); if (!flow->select) claim_zero(mlx4_flow_destroy(priv->dev, flow, error)); else flow->select = 0; flow = next; } return err; } /** * Synchronize flow rules. * * This function synchronizes flow rules with the state of the device by * taking into account isolated mode and whether target queues are * configured. * * @param priv * Pointer to private structure. * @param[out] error * Perform verbose error reporting if not NULL. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */ int mlx4_flow_sync(struct priv *priv, struct rte_flow_error *error) { struct rte_flow *flow; int ret; /* Internal flow rules are guaranteed to come first in the list. */ if (priv->isolated) { /* * Get rid of them in isolated mode, stop at the first * non-internal rule found. */ for (flow = LIST_FIRST(&priv->flows); flow && flow->internal; flow = LIST_FIRST(&priv->flows)) claim_zero(mlx4_flow_destroy(priv->dev, flow, error)); } else { /* Refresh internal rules. */ ret = mlx4_flow_internal(priv, error); if (ret) return ret; } /* Toggle the remaining flow rules . */ LIST_FOREACH(flow, &priv->flows, next) { ret = mlx4_flow_toggle(priv, flow, priv->started, error); if (ret) return ret; } if (!priv->started) assert(!priv->drop); return 0; } /** * Clean up all flow rules. * * Unlike mlx4_flow_flush(), this function takes care of all remaining flow * rules regardless of whether they are internal or user-configured. * * @param priv * Pointer to private structure. */ void mlx4_flow_clean(struct priv *priv) { struct rte_flow *flow; while ((flow = LIST_FIRST(&priv->flows))) mlx4_flow_destroy(priv->dev, flow, NULL); assert(LIST_EMPTY(&priv->rss)); } static const struct rte_flow_ops mlx4_flow_ops = { .validate = mlx4_flow_validate, .create = mlx4_flow_create, .destroy = mlx4_flow_destroy, .flush = mlx4_flow_flush, .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. */ int mlx4_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; }