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numam-dpdk/drivers/net/mlx4/mlx4_flow.c
Adrien Mazarguil e21bdfaa2c net/mlx4: fix queue index check on flow rules 
Users are not prevented from creating flow rules targeting nonexistent
queues, which silently makes such rules drop-like.

While it can be thought as a feature, reporting an error instead is
actually far more useful in order to catch common mistakes.

Fixes: 078b8b452e ("net/mlx4: add RSS flow rule action support")

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
2017-11-01 22:17:06 +01:00

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/*-
* 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 <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.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_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) {
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 = &eth_spec,
.mask = &eth_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 = &eth_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 = &eth_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 = &eth_allmulti;
pattern[1].mask = &eth_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;
}
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