lib/librte_pmd_enic/enic_clsf.c

   1 /*
   2  * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34 #ident "$Id$"
  35
  36 #include <libgen.h>
  37
  38 #include <rte_ethdev.h>
  39 #include <rte_malloc.h>
  40 #include <rte_hash.h>
  41 #include <rte_byteorder.h>
  42
  43 #include "enic_compat.h"
  44 #include "enic.h"
  45 #include "wq_enet_desc.h"
  46 #include "rq_enet_desc.h"
  47 #include "cq_enet_desc.h"
  48 #include "vnic_enet.h"
  49 #include "vnic_dev.h"
  50 #include "vnic_wq.h"
  51 #include "vnic_rq.h"
  52 #include "vnic_cq.h"
  53 #include "vnic_intr.h"
  54 #include "vnic_nic.h"
  55
  56 #ifdef RTE_MACHINE_CPUFLAG_SSE4_2
  57 #include <rte_hash_crc.h>
  58 #define DEFAULT_HASH_FUNC       rte_hash_crc
  59 #else
  60 #include <rte_jhash.h>
  61 #define DEFAULT_HASH_FUNC       rte_jhash
  62 #endif
  63
  64 #define SOCKET_0                0
  65 #define ENICPMD_CLSF_HASH_ENTRIES       ENICPMD_FDIR_MAX
  66 #define ENICPMD_CLSF_BUCKET_ENTRIES     4
  67
  68 int enic_fdir_del_fltr(struct enic *enic, struct rte_fdir_filter *params)
  69 {
  70         int32_t pos;
  71         struct enic_fdir_node *key;
  72         /* See if the key is in the table */
  73         pos = rte_hash_del_key(enic->fdir.hash, params);
  74         switch (pos) {
  75         case -EINVAL:
  76         case -ENOENT:
  77                 enic->fdir.stats.f_remove++;
  78                 return -EINVAL;
  79         default:
  80                 /* The entry is present in the table */
  81                 key = enic->fdir.nodes[pos];
  82
  83                 /* Delete the filter */
  84                 vnic_dev_classifier(enic->vdev, CLSF_DEL,
  85                         &key->fltr_id, NULL);
  86                 rte_free(key);
  87                 enic->fdir.nodes[pos] = NULL;
  88                 enic->fdir.stats.free++;
  89                 enic->fdir.stats.remove++;
  90                 break;
  91         }
  92         return 0;
  93 }
  94
  95 int enic_fdir_add_fltr(struct enic *enic, struct rte_fdir_filter *params,
  96         u16 queue, u8 drop)
  97 {
  98         struct enic_fdir_node *key;
  99         struct filter fltr = {.type = 0};
 100         int32_t pos;
 101         u8 do_free = 0;
 102         u16 old_fltr_id = 0;
 103
 104         if (!enic->fdir.hash || params->vlan_id || !params->l4type ||
 105                 (RTE_FDIR_IPTYPE_IPV6 == params->iptype) ||
 106                 (RTE_FDIR_L4TYPE_SCTP == params->l4type) ||
 107                 params->flex_bytes || drop) {
 108                 enic->fdir.stats.f_add++;
 109                 return -ENOTSUP;
 110         }
 111
 112         /* See if the key is already there in the table */
 113         pos = rte_hash_del_key(enic->fdir.hash, params);
 114         switch (pos) {
 115         case -EINVAL:
 116                 enic->fdir.stats.f_add++;
 117                 return -EINVAL;
 118         case -ENOENT:
 119                 /* Add a new classifier entry */
 120                 if (!enic->fdir.stats.free) {
 121                         enic->fdir.stats.f_add++;
 122                         return -ENOSPC;
 123                 }
 124                 key = rte_zmalloc("enic_fdir_node",
 125                                   sizeof(struct enic_fdir_node), 0);
 126                 if (!key) {
 127                         enic->fdir.stats.f_add++;
 128                         return -ENOMEM;
 129                 }
 130                 break;
 131         default:
 132                 /* The entry is already present in the table.
 133                  * Check if there is a change in queue
 134                  */
 135                 key = enic->fdir.nodes[pos];
 136                 enic->fdir.nodes[pos] = NULL;
 137                 if (unlikely(key->rq_index == queue)) {
 138                         /* Nothing to be done */
 139                         pos = rte_hash_add_key(enic->fdir.hash, params);
 140                         enic->fdir.nodes[pos] = key;
 141                         enic->fdir.stats.f_add++;
 142                         dev_warning(enic,
 143                                 "FDIR rule is already present\n");
 144                         return 0;
 145                 }
 146
 147                 if (likely(enic->fdir.stats.free)) {
 148                         /* Add the filter and then delete the old one.
 149                          * This is to avoid packets from going into the
 150                          * default queue during the window between
 151                          * delete and add
 152                          */
 153                         do_free = 1;
 154                         old_fltr_id = key->fltr_id;
 155                 } else {
 156                         /* No free slots in the classifier.
 157                          * Delete the filter and add the modified one later
 158                          */
 159                         vnic_dev_classifier(enic->vdev, CLSF_DEL,
 160                                 &key->fltr_id, NULL);
 161                         enic->fdir.stats.free++;
 162                 }
 163
 164                 break;
 165         }
 166
 167         key->filter = *params;
 168         key->rq_index = queue;
 169
 170         fltr.type = FILTER_IPV4_5TUPLE;
 171         fltr.u.ipv4.src_addr = rte_be_to_cpu_32(params->ip_src.ipv4_addr);
 172         fltr.u.ipv4.dst_addr = rte_be_to_cpu_32(params->ip_dst.ipv4_addr);
 173         fltr.u.ipv4.src_port = rte_be_to_cpu_16(params->port_src);
 174         fltr.u.ipv4.dst_port = rte_be_to_cpu_16(params->port_dst);
 175
 176         if (RTE_FDIR_L4TYPE_TCP == params->l4type)
 177                 fltr.u.ipv4.protocol = PROTO_TCP;
 178         else
 179                 fltr.u.ipv4.protocol = PROTO_UDP;
 180
 181         fltr.u.ipv4.flags = FILTER_FIELDS_IPV4_5TUPLE;
 182
 183         if (!vnic_dev_classifier(enic->vdev, CLSF_ADD, &queue, &fltr)) {
 184                 key->fltr_id = queue;
 185         } else {
 186                 dev_err(enic, "Add classifier entry failed\n");
 187                 enic->fdir.stats.f_add++;
 188                 rte_free(key);
 189                 return -1;
 190         }
 191
 192         if (do_free)
 193                 vnic_dev_classifier(enic->vdev, CLSF_DEL, &old_fltr_id, NULL);
 194         else{
 195                 enic->fdir.stats.free--;
 196                 enic->fdir.stats.add++;
 197         }
 198
 199         pos = rte_hash_add_key(enic->fdir.hash, (void *)key);
 200         enic->fdir.nodes[pos] = key;
 201         return 0;
 202 }
 203
 204 void enic_clsf_destroy(struct enic *enic)
 205 {
 206         u32 index;
 207         struct enic_fdir_node *key;
 208         /* delete classifier entries */
 209         for (index = 0; index < ENICPMD_FDIR_MAX; index++) {
 210                 key = enic->fdir.nodes[index];
 211                 if (key) {
 212                         vnic_dev_classifier(enic->vdev, CLSF_DEL,
 213                                 &key->fltr_id, NULL);
 214                         rte_free(key);
 215                 }
 216         }
 217
 218         if (enic->fdir.hash) {
 219                 rte_hash_free(enic->fdir.hash);
 220                 enic->fdir.hash = NULL;
 221         }
 222 }
 223
 224 int enic_clsf_init(struct enic *enic)
 225 {
 226         struct rte_hash_parameters hash_params = {
 227                 .name = "enicpmd_clsf_hash",
 228                 .entries = ENICPMD_CLSF_HASH_ENTRIES,
 229                 .bucket_entries = ENICPMD_CLSF_BUCKET_ENTRIES,
 230                 .key_len = sizeof(struct rte_fdir_filter),
 231                 .hash_func = DEFAULT_HASH_FUNC,
 232                 .hash_func_init_val = 0,
 233                 .socket_id = SOCKET_0,
 234         };
 235
 236         enic->fdir.hash = rte_hash_create(&hash_params);
 237         memset(&enic->fdir.stats, 0, sizeof(enic->fdir.stats));
 238         enic->fdir.stats.free = ENICPMD_FDIR_MAX;
 239         return (NULL == enic->fdir.hash);
 240 }