diff options
Diffstat (limited to 'src/spdk/dpdk/drivers/net/mlx4/mlx4_flow.c')
| -rw-r--r-- | src/spdk/dpdk/drivers/net/mlx4/mlx4_flow.c | 1617 |
1 files changed, 1617 insertions, 0 deletions
diff --git a/src/spdk/dpdk/drivers/net/mlx4/mlx4_flow.c b/src/spdk/dpdk/drivers/net/mlx4/mlx4_flow.c new file mode 100644 index 00000000..b40e7e5c --- /dev/null +++ b/src/spdk/dpdk/drivers/net/mlx4/mlx4_flow.c @@ -0,0 +1,1617 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2017 6WIND S.A. + * Copyright 2017 Mellanox Technologies, Ltd + */ + +/** + * @file + * Flow API operations for mlx4 driver. + */ + +#include <arpa/inet.h> +#include <assert.h> +#include <errno.h> +#include <stdalign.h> +#include <stddef.h> +#include <stdint.h> +#include <string.h> +#include <sys/queue.h> + +/* Verbs headers do not support -pedantic. */ +#ifdef PEDANTIC +#pragma GCC diagnostic ignored "-Wpedantic" +#endif +#include <infiniband/verbs.h> +#ifdef PEDANTIC +#pragma GCC diagnostic error "-Wpedantic" +#endif + +#include <rte_byteorder.h> +#include <rte_errno.h> +#include <rte_eth_ctrl.h> +#include <rte_ethdev_driver.h> +#include <rte_ether.h> +#include <rte_flow.h> +#include <rte_flow_driver.h> +#include <rte_malloc.h> + +/* PMD headers. */ +#include "mlx4.h" +#include "mlx4_glue.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 supported RSS hash field types between DPDK and Verbs formats. + * + * This function returns the supported (default) set when @p types has + * special value 0. + * + * @param priv + * Pointer to private structure. + * @param types + * Depending on @p verbs_to_dpdk, hash types in either DPDK (see struct + * rte_eth_rss_conf) or Verbs format. + * @param verbs_to_dpdk + * A zero value converts @p types from DPDK to Verbs, a nonzero value + * performs the reverse operation. + * + * @return + * Converted RSS hash fields on success, (uint64_t)-1 otherwise and + * rte_errno is set. + */ +uint64_t +mlx4_conv_rss_types(struct priv *priv, uint64_t types, int verbs_to_dpdk) +{ + enum { + INNER, + IPV4, IPV4_1, IPV4_2, IPV6, IPV6_1, IPV6_2, IPV6_3, + TCP, UDP, + IPV4_TCP, IPV4_UDP, IPV6_TCP, IPV6_TCP_1, IPV6_UDP, IPV6_UDP_1, + }; + enum { + VERBS_IPV4 = IBV_RX_HASH_SRC_IPV4 | IBV_RX_HASH_DST_IPV4, + VERBS_IPV6 = IBV_RX_HASH_SRC_IPV6 | IBV_RX_HASH_DST_IPV6, + VERBS_TCP = IBV_RX_HASH_SRC_PORT_TCP | IBV_RX_HASH_DST_PORT_TCP, + VERBS_UDP = IBV_RX_HASH_SRC_PORT_UDP | IBV_RX_HASH_DST_PORT_UDP, + }; + static const uint64_t dpdk[] = { + [INNER] = 0, + [IPV4] = ETH_RSS_IPV4, + [IPV4_1] = ETH_RSS_FRAG_IPV4, + [IPV4_2] = ETH_RSS_NONFRAG_IPV4_OTHER, + [IPV6] = ETH_RSS_IPV6, + [IPV6_1] = ETH_RSS_FRAG_IPV6, + [IPV6_2] = ETH_RSS_NONFRAG_IPV6_OTHER, + [IPV6_3] = ETH_RSS_IPV6_EX, + [TCP] = 0, + [UDP] = 0, + [IPV4_TCP] = ETH_RSS_NONFRAG_IPV4_TCP, + [IPV4_UDP] = ETH_RSS_NONFRAG_IPV4_UDP, + [IPV6_TCP] = ETH_RSS_NONFRAG_IPV6_TCP, + [IPV6_TCP_1] = ETH_RSS_IPV6_TCP_EX, + [IPV6_UDP] = ETH_RSS_NONFRAG_IPV6_UDP, + [IPV6_UDP_1] = ETH_RSS_IPV6_UDP_EX, + }; + static const uint64_t verbs[RTE_DIM(dpdk)] = { + [INNER] = IBV_RX_HASH_INNER, + [IPV4] = VERBS_IPV4, + [IPV4_1] = VERBS_IPV4, + [IPV4_2] = VERBS_IPV4, + [IPV6] = VERBS_IPV6, + [IPV6_1] = VERBS_IPV6, + [IPV6_2] = VERBS_IPV6, + [IPV6_3] = VERBS_IPV6, + [TCP] = VERBS_TCP, + [UDP] = VERBS_UDP, + [IPV4_TCP] = VERBS_IPV4 | VERBS_TCP, + [IPV4_UDP] = VERBS_IPV4 | VERBS_UDP, + [IPV6_TCP] = VERBS_IPV6 | VERBS_TCP, + [IPV6_TCP_1] = VERBS_IPV6 | VERBS_TCP, + [IPV6_UDP] = VERBS_IPV6 | VERBS_UDP, + [IPV6_UDP_1] = VERBS_IPV6 | VERBS_UDP, + }; + const uint64_t *in = verbs_to_dpdk ? verbs : dpdk; + const uint64_t *out = verbs_to_dpdk ? dpdk : verbs; + uint64_t seen = 0; + uint64_t conv = 0; + unsigned int i; + + if (!types) { + if (!verbs_to_dpdk) + return priv->hw_rss_sup; + types = priv->hw_rss_sup; + } + for (i = 0; i != RTE_DIM(dpdk); ++i) + if (in[i] && (types & in[i]) == in[i]) { + seen |= types & in[i]; + conv |= out[i]; + } + if ((verbs_to_dpdk || (conv & priv->hw_rss_sup) == conv) && + !(types & ~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. + * - Due to HW/FW limitation, flow rule priority is not taken into account + * when matching UDP destination ports, doing is therefore only supported + * at the highest priority level (0). + * + * @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 (mask && mask->hdr.dst_port && flow->priority) { + msg = "combining UDP destination port matching with a nonzero" + " priority level is not supported"; + 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; + int overlap; + + 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->transfer) + return rte_flow_error_set + (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR_TRANSFER, + NULL, "transfer 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: + overlap = 0; + proc = mlx4_flow_proc_item_list; + flow->priority = attr->priority; + /* 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) { + /* This one may appear anywhere multiple times. */ + if (action->type == RTE_FLOW_ACTION_TYPE_VOID) + continue; + /* Fate-deciding actions may appear exactly once. */ + if (overlap) { + msg = "cannot combine several fate-deciding actions," + " choose between DROP, QUEUE or RSS"; + goto exit_action_not_supported; + } + overlap = 1; + switch (action->type) { + const struct rte_flow_action_queue *queue; + const struct rte_flow_action_rss *rss; + const uint8_t *rss_key; + uint32_t rss_key_len; + uint64_t fields; + unsigned int i; + + 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. */ + if (rss->key_len) { + rss_key = rss->key; + rss_key_len = rss->key_len; + } else { + rss_key = mlx4_rss_hash_key_default; + rss_key_len = MLX4_RSS_HASH_KEY_SIZE; + } + /* Sanity checks. */ + for (i = 0; i < rss->queue_num; ++i) + if (rss->queue[i] >= + priv->dev->data->nb_rx_queues) + break; + if (i != rss->queue_num) { + msg = "queue index target beyond number of" + " configured Rx queues"; + goto exit_action_not_supported; + } + if (!rte_is_power_of_2(rss->queue_num)) { + msg = "for RSS, mlx4 requires the number of" + " queues to be a power of two"; + goto exit_action_not_supported; + } + if (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->queue_num; ++i) + if (rss->queue[i] - rss->queue[i - 1] != 1) + break; + if (i != rss->queue_num) { + msg = "mlx4 requires RSS contexts to use" + " consecutive queue indices only"; + goto exit_action_not_supported; + } + if (rss->queue[0] % rss->queue_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; + } + if (rss->func && + rss->func != RTE_ETH_HASH_FUNCTION_TOEPLITZ) { + msg = "the only supported RSS hash function" + " is Toeplitz"; + goto exit_action_not_supported; + } + if (rss->level) { + msg = "a nonzero RSS encapsulation level is" + " not supported"; + goto exit_action_not_supported; + } + rte_errno = 0; + fields = mlx4_conv_rss_types(priv, rss->types, 0); + if (fields == (uint64_t)-1 && rte_errno) { + msg = "unsupported RSS hash type requested"; + goto exit_action_not_supported; + } + flow->rss = mlx4_rss_get + (priv, fields, rss_key, rss->queue_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; + } + } + /* When fate is unknown, drop traffic. */ + if (!overlap) + flow->drop = 1; + /* 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))) { + if (temp.rss) + mlx4_rss_put(temp.rss); + 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 = mlx4_glue->create_cq(priv->ctx, 1, NULL, NULL, 0); + if (!drop->cq) + goto error; + drop->qp = mlx4_glue->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(mlx4_glue->destroy_qp(drop->qp)); + if (drop->cq) + claim_zero(mlx4_glue->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(mlx4_glue->destroy_qp(drop->qp)); + claim_zero(mlx4_glue->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(mlx4_glue->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(mlx4_glue->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(mlx4_glue->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 = mlx4_glue->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 + broadcast + catch-all (VLAN filtering is ignored). + * 2. All multicast: + * port MAC/VLAN + broadcast + 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_RX_OFFLOAD_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; + uint16_t queue[queues]; + struct rte_flow_action_rss action_rss = { + .func = RTE_ETH_HASH_FUNCTION_DEFAULT, + .level = 0, + .types = 0, + .key_len = MLX4_RSS_HASH_KEY_SIZE, + .queue_num = queues, + .key = mlx4_rss_hash_key_default, + .queue = queue, + }; + struct rte_flow_action actions[] = { + { + .type = RTE_FLOW_ACTION_TYPE_RSS, + .conf = &action_rss, + }, + { + .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.offloads & + DEV_RX_OFFLOAD_VLAN_FILTER) && + !priv->dev->data->promiscuous ? + &vlan_spec.tci : + NULL; + 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. */ + for (i = 0; i != queues; ++i) + 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) + 1; ++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, action_rss.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 (priv->dev->data->promiscuous || priv->dev->data->all_multicast) { + 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, action_rss.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; +} |