drivers/net/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 void enic_fdir_stats_get(struct enic *enic, struct rte_eth_fdir_stats *stats)
  69 {
  70         *stats = enic->fdir.stats;
  71 }
  72
  73 int enic_fdir_del_fltr(struct enic *enic, struct rte_eth_fdir_filter *params)
  74 {
  75         int32_t pos;
  76         struct enic_fdir_node *key;
  77         /* See if the key is in the table */
  78         pos = rte_hash_del_key(enic->fdir.hash, params);
  79         switch (pos) {
  80         case -EINVAL:
  81         case -ENOENT:
  82                 enic->fdir.stats.f_remove++;
  83                 return -EINVAL;
  84         default:
  85                 /* The entry is present in the table */
  86                 key = enic->fdir.nodes[pos];
  87
  88                 /* Delete the filter */
  89                 vnic_dev_classifier(enic->vdev, CLSF_DEL,
  90                         &key->fltr_id, NULL);
  91                 rte_free(key);
  92                 enic->fdir.nodes[pos] = NULL;
  93                 enic->fdir.stats.free++;
  94                 enic->fdir.stats.remove++;
  95                 break;
  96         }
  97         return 0;
  98 }
  99
 100 int enic_fdir_add_fltr(struct enic *enic, struct rte_eth_fdir_filter *params)
 101 {
 102         struct enic_fdir_node *key;
 103         struct filter fltr = {0};
 104         int32_t pos;
 105         u8 do_free = 0;
 106         u16 old_fltr_id = 0;
 107         u32 flowtype_supported;
 108         u16 flex_bytes;
 109         u16 queue;
 110
 111         flowtype_supported = (
 112                 (RTE_ETH_FLOW_NONFRAG_IPV4_TCP == params->input.flow_type) ||
 113                 (RTE_ETH_FLOW_NONFRAG_IPV4_UDP == params->input.flow_type));
 114
 115         flex_bytes = ((params->input.flow_ext.flexbytes[1] << 8 & 0xFF00) |
 116                 (params->input.flow_ext.flexbytes[0] & 0xFF));
 117
 118         if (!enic->fdir.hash ||
 119                 (params->input.flow_ext.vlan_tci & 0xFFF) ||
 120                 !flowtype_supported || flex_bytes ||
 121                 params->action.behavior /* drop */) {
 122                 enic->fdir.stats.f_add++;
 123                 return -ENOTSUP;
 124         }
 125
 126         queue = params->action.rx_queue;
 127         /* See if the key is already there in the table */
 128         pos = rte_hash_del_key(enic->fdir.hash, params);
 129         switch (pos) {
 130         case -EINVAL:
 131                 enic->fdir.stats.f_add++;
 132                 return -EINVAL;
 133         case -ENOENT:
 134                 /* Add a new classifier entry */
 135                 if (!enic->fdir.stats.free) {
 136                         enic->fdir.stats.f_add++;
 137                         return -ENOSPC;
 138                 }
 139                 key = rte_zmalloc("enic_fdir_node",
 140                                   sizeof(struct enic_fdir_node), 0);
 141                 if (!key) {
 142                         enic->fdir.stats.f_add++;
 143                         return -ENOMEM;
 144                 }
 145                 break;
 146         default:
 147                 /* The entry is already present in the table.
 148                  * Check if there is a change in queue
 149                  */
 150                 key = enic->fdir.nodes[pos];
 151                 enic->fdir.nodes[pos] = NULL;
 152                 if (unlikely(key->rq_index == queue)) {
 153                         /* Nothing to be done */
 154                         pos = rte_hash_add_key(enic->fdir.hash, params);
 155                         enic->fdir.nodes[pos] = key;
 156                         enic->fdir.stats.f_add++;
 157                         dev_warning(enic,
 158                                 "FDIR rule is already present\n");
 159                         return 0;
 160                 }
 161
 162                 if (likely(enic->fdir.stats.free)) {
 163                         /* Add the filter and then delete the old one.
 164                          * This is to avoid packets from going into the
 165                          * default queue during the window between
 166                          * delete and add
 167                          */
 168                         do_free = 1;
 169                         old_fltr_id = key->fltr_id;
 170                 } else {
 171                         /* No free slots in the classifier.
 172                          * Delete the filter and add the modified one later
 173                          */
 174                         vnic_dev_classifier(enic->vdev, CLSF_DEL,
 175                                 &key->fltr_id, NULL);
 176                         enic->fdir.stats.free++;
 177                 }
 178
 179                 break;
 180         }
 181
 182         key->filter = *params;
 183         key->rq_index = queue;
 184
 185         fltr.type = FILTER_IPV4_5TUPLE;
 186         fltr.u.ipv4.src_addr = rte_be_to_cpu_32(
 187                 params->input.flow.ip4_flow.src_ip);
 188         fltr.u.ipv4.dst_addr = rte_be_to_cpu_32(
 189                 params->input.flow.ip4_flow.dst_ip);
 190         fltr.u.ipv4.src_port = rte_be_to_cpu_16(
 191                 params->input.flow.udp4_flow.src_port);
 192         fltr.u.ipv4.dst_port = rte_be_to_cpu_16(
 193                 params->input.flow.udp4_flow.dst_port);
 194
 195         if (RTE_ETH_FLOW_NONFRAG_IPV4_TCP == params->input.flow_type)
 196                 fltr.u.ipv4.protocol = PROTO_TCP;
 197         else
 198                 fltr.u.ipv4.protocol = PROTO_UDP;
 199
 200         fltr.u.ipv4.flags = FILTER_FIELDS_IPV4_5TUPLE;
 201
 202         if (!vnic_dev_classifier(enic->vdev, CLSF_ADD, &queue, &fltr)) {
 203                 key->fltr_id = queue;
 204         } else {
 205                 dev_err(enic, "Add classifier entry failed\n");
 206                 enic->fdir.stats.f_add++;
 207                 rte_free(key);
 208                 return -1;
 209         }
 210
 211         if (do_free)
 212                 vnic_dev_classifier(enic->vdev, CLSF_DEL, &old_fltr_id, NULL);
 213         else{
 214                 enic->fdir.stats.free--;
 215                 enic->fdir.stats.add++;
 216         }
 217
 218         pos = rte_hash_add_key(enic->fdir.hash, (void *)key);
 219         enic->fdir.nodes[pos] = key;
 220         return 0;
 221 }
 222
 223 void enic_clsf_destroy(struct enic *enic)
 224 {
 225         u32 index;
 226         struct enic_fdir_node *key;
 227         /* delete classifier entries */
 228         for (index = 0; index < ENICPMD_FDIR_MAX; index++) {
 229                 key = enic->fdir.nodes[index];
 230                 if (key) {
 231                         vnic_dev_classifier(enic->vdev, CLSF_DEL,
 232                                 &key->fltr_id, NULL);
 233                         rte_free(key);
 234                 }
 235         }
 236
 237         if (enic->fdir.hash) {
 238                 rte_hash_free(enic->fdir.hash);
 239                 enic->fdir.hash = NULL;
 240         }
 241 }
 242
 243 int enic_clsf_init(struct enic *enic)
 244 {
 245         struct rte_hash_parameters hash_params = {
 246                 .name = "enicpmd_clsf_hash",
 247                 .entries = ENICPMD_CLSF_HASH_ENTRIES,
 248                 .bucket_entries = ENICPMD_CLSF_BUCKET_ENTRIES,
 249                 .key_len = RTE_HASH_KEY_LENGTH_MAX,
 250                 .hash_func = DEFAULT_HASH_FUNC,
 251                 .hash_func_init_val = 0,
 252                 .socket_id = SOCKET_0,
 253         };
 254
 255         enic->fdir.hash = rte_hash_create(&hash_params);
 256         memset(&enic->fdir.stats, 0, sizeof(enic->fdir.stats));
 257         enic->fdir.stats.free = ENICPMD_FDIR_MAX;
 258         return (NULL == enic->fdir.hash);
 259 }