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/*
* Copyright 2008-2014 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*
* Copyright (c) 2014, Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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 HOLDER 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.
*
*/
#include <libgen.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>
#include <rte_hash.h>
#include <rte_byteorder.h>
#include "enic_compat.h"
#include "enic.h"
#include "wq_enet_desc.h"
#include "rq_enet_desc.h"
#include "cq_enet_desc.h"
#include "vnic_enet.h"
#include "vnic_dev.h"
#include "vnic_wq.h"
#include "vnic_rq.h"
#include "vnic_cq.h"
#include "vnic_intr.h"
#include "vnic_nic.h"
#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
#include <rte_hash_crc.h>
#define DEFAULT_HASH_FUNC rte_hash_crc
#else
#include <rte_jhash.h>
#define DEFAULT_HASH_FUNC rte_jhash
#endif
#define ENICPMD_CLSF_HASH_ENTRIES ENICPMD_FDIR_MAX
void enic_fdir_stats_get(struct enic *enic, struct rte_eth_fdir_stats *stats)
{
*stats = enic->fdir.stats;
}
int enic_fdir_del_fltr(struct enic *enic, struct rte_eth_fdir_filter *params)
{
int32_t pos;
struct enic_fdir_node *key;
/* See if the key is in the table */
pos = rte_hash_del_key(enic->fdir.hash, params);
switch (pos) {
case -EINVAL:
case -ENOENT:
enic->fdir.stats.f_remove++;
return -EINVAL;
default:
/* The entry is present in the table */
key = enic->fdir.nodes[pos];
/* Delete the filter */
vnic_dev_classifier(enic->vdev, CLSF_DEL,
&key->fltr_id, NULL);
rte_free(key);
enic->fdir.nodes[pos] = NULL;
enic->fdir.stats.free++;
enic->fdir.stats.remove++;
break;
}
return 0;
}
int enic_fdir_add_fltr(struct enic *enic, struct rte_eth_fdir_filter *params)
{
struct enic_fdir_node *key;
struct filter fltr = {0};
int32_t pos;
u8 do_free = 0;
u16 old_fltr_id = 0;
u32 flowtype_supported;
u16 flex_bytes;
u16 queue;
flowtype_supported = (
(RTE_ETH_FLOW_NONFRAG_IPV4_TCP == params->input.flow_type) ||
(RTE_ETH_FLOW_NONFRAG_IPV4_UDP == params->input.flow_type));
flex_bytes = ((params->input.flow_ext.flexbytes[1] << 8 & 0xFF00) |
(params->input.flow_ext.flexbytes[0] & 0xFF));
if (!enic->fdir.hash ||
(params->input.flow_ext.vlan_tci & 0xFFF) ||
!flowtype_supported || flex_bytes ||
params->action.behavior /* drop */) {
enic->fdir.stats.f_add++;
return -ENOTSUP;
}
queue = params->action.rx_queue;
/* See if the key is already there in the table */
pos = rte_hash_del_key(enic->fdir.hash, params);
switch (pos) {
case -EINVAL:
enic->fdir.stats.f_add++;
return -EINVAL;
case -ENOENT:
/* Add a new classifier entry */
if (!enic->fdir.stats.free) {
enic->fdir.stats.f_add++;
return -ENOSPC;
}
key = rte_zmalloc("enic_fdir_node",
sizeof(struct enic_fdir_node), 0);
if (!key) {
enic->fdir.stats.f_add++;
return -ENOMEM;
}
break;
default:
/* The entry is already present in the table.
* Check if there is a change in queue
*/
key = enic->fdir.nodes[pos];
enic->fdir.nodes[pos] = NULL;
if (unlikely(key->rq_index == queue)) {
/* Nothing to be done */
enic->fdir.stats.f_add++;
pos = rte_hash_add_key(enic->fdir.hash, params);
if (pos < 0) {
dev_err(enic, "Add hash key failed\n");
return pos;
}
enic->fdir.nodes[pos] = key;
dev_warning(enic,
"FDIR rule is already present\n");
return 0;
}
if (likely(enic->fdir.stats.free)) {
/* Add the filter and then delete the old one.
* This is to avoid packets from going into the
* default queue during the window between
* delete and add
*/
do_free = 1;
old_fltr_id = key->fltr_id;
} else {
/* No free slots in the classifier.
* Delete the filter and add the modified one later
*/
vnic_dev_classifier(enic->vdev, CLSF_DEL,
&key->fltr_id, NULL);
enic->fdir.stats.free++;
}
break;
}
key->filter = *params;
key->rq_index = queue;
fltr.type = FILTER_IPV4_5TUPLE;
fltr.u.ipv4.src_addr = rte_be_to_cpu_32(
params->input.flow.ip4_flow.src_ip);
fltr.u.ipv4.dst_addr = rte_be_to_cpu_32(
params->input.flow.ip4_flow.dst_ip);
fltr.u.ipv4.src_port = rte_be_to_cpu_16(
params->input.flow.udp4_flow.src_port);
fltr.u.ipv4.dst_port = rte_be_to_cpu_16(
params->input.flow.udp4_flow.dst_port);
if (RTE_ETH_FLOW_NONFRAG_IPV4_TCP == params->input.flow_type)
fltr.u.ipv4.protocol = PROTO_TCP;
else
fltr.u.ipv4.protocol = PROTO_UDP;
fltr.u.ipv4.flags = FILTER_FIELDS_IPV4_5TUPLE;
if (!vnic_dev_classifier(enic->vdev, CLSF_ADD, &queue, &fltr)) {
key->fltr_id = queue;
} else {
dev_err(enic, "Add classifier entry failed\n");
enic->fdir.stats.f_add++;
rte_free(key);
return -1;
}
if (do_free)
vnic_dev_classifier(enic->vdev, CLSF_DEL, &old_fltr_id, NULL);
else{
enic->fdir.stats.free--;
enic->fdir.stats.add++;
}
pos = rte_hash_add_key(enic->fdir.hash, params);
if (pos < 0) {
dev_err(enic, "Add hash key failed\n");
return pos;
}
enic->fdir.nodes[pos] = key;
return 0;
}
void enic_clsf_destroy(struct enic *enic)
{
u32 index;
struct enic_fdir_node *key;
/* delete classifier entries */
for (index = 0; index < ENICPMD_FDIR_MAX; index++) {
key = enic->fdir.nodes[index];
if (key) {
vnic_dev_classifier(enic->vdev, CLSF_DEL,
&key->fltr_id, NULL);
rte_free(key);
}
}
if (enic->fdir.hash) {
rte_hash_free(enic->fdir.hash);
enic->fdir.hash = NULL;
}
}
int enic_clsf_init(struct enic *enic)
{
char clsf_name[RTE_HASH_NAMESIZE];
struct rte_hash_parameters hash_params = {
.name = clsf_name,
.entries = ENICPMD_CLSF_HASH_ENTRIES,
.key_len = sizeof(struct rte_eth_fdir_filter),
.hash_func = DEFAULT_HASH_FUNC,
.hash_func_init_val = 0,
.socket_id = SOCKET_ID_ANY,
};
snprintf(clsf_name, RTE_HASH_NAMESIZE, "enic_clsf_%s", enic->bdf_name);
enic->fdir.hash = rte_hash_create(&hash_params);
memset(&enic->fdir.stats, 0, sizeof(enic->fdir.stats));
enic->fdir.stats.free = ENICPMD_FDIR_MAX;
return NULL == enic->fdir.hash;
}
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