drivers/net/qede/qede_fdir.c

   1 /*
   2  * Copyright (c) 2017 QLogic Corporation.
   3  * All rights reserved.
   4  * www.qlogic.com
   5  *
   6  * See LICENSE.qede_pmd for copyright and licensing details.
   7  */
   8
   9 #include <rte_udp.h>
  10 #include <rte_tcp.h>
  11 #include <rte_sctp.h>
  12 #include <rte_errno.h>
  13
  14 #include "qede_ethdev.h"
  15
  16 #define IP_VERSION                              (0x40)
  17 #define IP_HDRLEN                               (0x5)
  18 #define QEDE_FDIR_IP_DEFAULT_VERSION_IHL        (IP_VERSION | IP_HDRLEN)
  19 #define QEDE_FDIR_TCP_DEFAULT_DATAOFF           (0x50)
  20 #define QEDE_FDIR_IPV4_DEF_TTL                  (64)
  21
  22 /* Sum of length of header types of L2, L3, L4.
  23  * L2 : ether_hdr + vlan_hdr + vxlan_hdr
  24  * L3 : ipv6_hdr
  25  * L4 : tcp_hdr
  26  */
  27 #define QEDE_MAX_FDIR_PKT_LEN                   (86)
  28
  29 #ifndef IPV6_ADDR_LEN
  30 #define IPV6_ADDR_LEN                           (16)
  31 #endif
  32
  33 #define QEDE_VALID_FLOW(flow_type) \
  34         ((flow_type) == RTE_ETH_FLOW_NONFRAG_IPV4_TCP   || \
  35         (flow_type) == RTE_ETH_FLOW_NONFRAG_IPV4_UDP    || \
  36         (flow_type) == RTE_ETH_FLOW_NONFRAG_IPV6_TCP    || \
  37         (flow_type) == RTE_ETH_FLOW_NONFRAG_IPV6_UDP)
  38
  39 /* Note: Flowdir support is only partial.
  40  * For ex: drop_queue, FDIR masks, flex_conf are not supported.
  41  * Parameters like pballoc/status fields are irrelevant here.
  42  */
  43 int qede_check_fdir_support(struct rte_eth_dev *eth_dev)
  44 {
  45         struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
  46         struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
  47         struct rte_fdir_conf *fdir = &eth_dev->data->dev_conf.fdir_conf;
  48
  49         /* check FDIR modes */
  50         switch (fdir->mode) {
  51         case RTE_FDIR_MODE_NONE:
  52                 qdev->fdir_info.arfs.arfs_enable = false;
  53                 DP_INFO(edev, "flowdir is disabled\n");
  54         break;
  55         case RTE_FDIR_MODE_PERFECT:
  56                 if (ECORE_IS_CMT(edev)) {
  57                         DP_ERR(edev, "flowdir is not supported in 100G mode\n");
  58                         qdev->fdir_info.arfs.arfs_enable = false;
  59                         return -ENOTSUP;
  60                 }
  61                 qdev->fdir_info.arfs.arfs_enable = true;
  62                 DP_INFO(edev, "flowdir is enabled\n");
  63         break;
  64         case RTE_FDIR_MODE_PERFECT_TUNNEL:
  65         case RTE_FDIR_MODE_SIGNATURE:
  66         case RTE_FDIR_MODE_PERFECT_MAC_VLAN:
  67                 DP_ERR(edev, "Unsupported flowdir mode %d\n", fdir->mode);
  68                 return -ENOTSUP;
  69         }
  70
  71         return 0;
  72 }
  73
  74 void qede_fdir_dealloc_resc(struct rte_eth_dev *eth_dev)
  75 {
  76         struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
  77         struct qede_fdir_entry *tmp = NULL;
  78
  79         SLIST_FOREACH(tmp, &qdev->fdir_info.fdir_list_head, list) {
  80                 if (tmp) {
  81                         if (tmp->mz)
  82                                 rte_memzone_free(tmp->mz);
  83                         SLIST_REMOVE(&qdev->fdir_info.fdir_list_head, tmp,
  84                                      qede_fdir_entry, list);
  85                         rte_free(tmp);
  86                 }
  87         }
  88 }
  89
  90 static int
  91 qede_config_cmn_fdir_filter(struct rte_eth_dev *eth_dev,
  92                             struct rte_eth_fdir_filter *fdir_filter,
  93                             bool add)
  94 {
  95         struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
  96         struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
  97         char mz_name[RTE_MEMZONE_NAMESIZE] = {0};
  98         struct qede_fdir_entry *tmp = NULL;
  99         struct qede_fdir_entry *fdir = NULL;
 100         const struct rte_memzone *mz;
 101         struct ecore_hwfn *p_hwfn;
 102         enum _ecore_status_t rc;
 103         uint16_t pkt_len;
 104         void *pkt;
 105
 106         if (add) {
 107                 if (qdev->fdir_info.filter_count == QEDE_RFS_MAX_FLTR - 1) {
 108                         DP_ERR(edev, "Reached max flowdir filter limit\n");
 109                         return -EINVAL;
 110                 }
 111                 fdir = rte_malloc(NULL, sizeof(struct qede_fdir_entry),
 112                                   RTE_CACHE_LINE_SIZE);
 113                 if (!fdir) {
 114                         DP_ERR(edev, "Did not allocate memory for fdir\n");
 115                         return -ENOMEM;
 116                 }
 117         }
 118         /* soft_id could have been used as memzone string, but soft_id is
 119          * not currently used so it has no significance.
 120          */
 121         snprintf(mz_name, sizeof(mz_name) - 1, "%lx",
 122                  (unsigned long)rte_get_timer_cycles());
 123         mz = rte_memzone_reserve_aligned(mz_name, QEDE_MAX_FDIR_PKT_LEN,
 124                                          SOCKET_ID_ANY, 0, RTE_CACHE_LINE_SIZE);
 125         if (!mz) {
 126                 DP_ERR(edev, "Failed to allocate memzone for fdir, err = %s\n",
 127                        rte_strerror(rte_errno));
 128                 rc = -rte_errno;
 129                 goto err1;
 130         }
 131
 132         pkt = mz->addr;
 133         memset(pkt, 0, QEDE_MAX_FDIR_PKT_LEN);
 134         pkt_len = qede_fdir_construct_pkt(eth_dev, fdir_filter, pkt,
 135                                           &qdev->fdir_info.arfs);
 136         if (pkt_len == 0) {
 137                 rc = -EINVAL;
 138                 goto err2;
 139         }
 140         DP_INFO(edev, "pkt_len = %u memzone = %s\n", pkt_len, mz_name);
 141         if (add) {
 142                 SLIST_FOREACH(tmp, &qdev->fdir_info.fdir_list_head, list) {
 143                         if (memcmp(tmp->mz->addr, pkt, pkt_len) == 0) {
 144                                 DP_INFO(edev, "flowdir filter exist\n");
 145                                 rc = 0;
 146                                 goto err2;
 147                         }
 148                 }
 149         } else {
 150                 SLIST_FOREACH(tmp, &qdev->fdir_info.fdir_list_head, list) {
 151                         if (memcmp(tmp->mz->addr, pkt, pkt_len) == 0)
 152                                 break;
 153                 }
 154                 if (!tmp) {
 155                         DP_ERR(edev, "flowdir filter does not exist\n");
 156                         rc = -EEXIST;
 157                         goto err2;
 158                 }
 159         }
 160         p_hwfn = ECORE_LEADING_HWFN(edev);
 161         if (add) {
 162                 if (!qdev->fdir_info.arfs.arfs_enable) {
 163                         /* Force update */
 164                         eth_dev->data->dev_conf.fdir_conf.mode =
 165                                                 RTE_FDIR_MODE_PERFECT;
 166                         qdev->fdir_info.arfs.arfs_enable = true;
 167                         DP_INFO(edev, "Force enable flowdir in perfect mode\n");
 168                 }
 169                 /* Enable ARFS searcher with updated flow_types */
 170                 ecore_arfs_mode_configure(p_hwfn, p_hwfn->p_arfs_ptt,
 171                                           &qdev->fdir_info.arfs);
 172         }
 173         /* configure filter with ECORE_SPQ_MODE_EBLOCK */
 174         rc = ecore_configure_rfs_ntuple_filter(p_hwfn, NULL,
 175                                                (dma_addr_t)mz->iova,
 176                                                pkt_len,
 177                                                fdir_filter->action.rx_queue,
 178                                                0, add);
 179         if (rc == ECORE_SUCCESS) {
 180                 if (add) {
 181                         fdir->rx_queue = fdir_filter->action.rx_queue;
 182                         fdir->pkt_len = pkt_len;
 183                         fdir->mz = mz;
 184                         SLIST_INSERT_HEAD(&qdev->fdir_info.fdir_list_head,
 185                                           fdir, list);
 186                         qdev->fdir_info.filter_count++;
 187                         DP_INFO(edev, "flowdir filter added, count = %d\n",
 188                                 qdev->fdir_info.filter_count);
 189                 } else {
 190                         rte_memzone_free(tmp->mz);
 191                         SLIST_REMOVE(&qdev->fdir_info.fdir_list_head, tmp,
 192                                      qede_fdir_entry, list);
 193                         rte_free(tmp); /* the node deleted */
 194                         rte_memzone_free(mz); /* temp node allocated */
 195                         qdev->fdir_info.filter_count--;
 196                         DP_INFO(edev, "Fdir filter deleted, count = %d\n",
 197                                 qdev->fdir_info.filter_count);
 198                 }
 199         } else {
 200                 DP_ERR(edev, "flowdir filter failed, rc=%d filter_count=%d\n",
 201                        rc, qdev->fdir_info.filter_count);
 202         }
 203
 204         /* Disable ARFS searcher if there are no more filters */
 205         if (qdev->fdir_info.filter_count == 0) {
 206                 memset(&qdev->fdir_info.arfs, 0,
 207                        sizeof(struct ecore_arfs_config_params));
 208                 DP_INFO(edev, "Disabling flowdir\n");
 209                 qdev->fdir_info.arfs.arfs_enable = false;
 210                 ecore_arfs_mode_configure(p_hwfn, p_hwfn->p_arfs_ptt,
 211                                           &qdev->fdir_info.arfs);
 212         }
 213         return 0;
 214
 215 err2:
 216         rte_memzone_free(mz);
 217 err1:
 218         if (add)
 219                 rte_free(fdir);
 220         return rc;
 221 }
 222
 223 static int
 224 qede_fdir_filter_add(struct rte_eth_dev *eth_dev,
 225                      struct rte_eth_fdir_filter *fdir,
 226                      bool add)
 227 {
 228         struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
 229         struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
 230
 231         if (!QEDE_VALID_FLOW(fdir->input.flow_type)) {
 232                 DP_ERR(edev, "invalid flow_type input\n");
 233                 return -EINVAL;
 234         }
 235
 236         if (fdir->action.rx_queue >= QEDE_RSS_COUNT(qdev)) {
 237                 DP_ERR(edev, "invalid queue number %u\n",
 238                        fdir->action.rx_queue);
 239                 return -EINVAL;
 240         }
 241
 242         if (fdir->input.flow_ext.is_vf) {
 243                 DP_ERR(edev, "flowdir is not supported over VF\n");
 244                 return -EINVAL;
 245         }
 246
 247         return qede_config_cmn_fdir_filter(eth_dev, fdir, add);
 248 }
 249
 250 /* Fills the L3/L4 headers and returns the actual length  of flowdir packet */
 251 uint16_t
 252 qede_fdir_construct_pkt(struct rte_eth_dev *eth_dev,
 253                         struct rte_eth_fdir_filter *fdir,
 254                         void *buff,
 255                         struct ecore_arfs_config_params *params)
 256
 257 {
 258         struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
 259         struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
 260         uint16_t *ether_type;
 261         uint8_t *raw_pkt;
 262         struct rte_eth_fdir_input *input;
 263         static uint8_t vlan_frame[] = {0x81, 0, 0, 0};
 264         struct ipv4_hdr *ip;
 265         struct ipv6_hdr *ip6;
 266         struct udp_hdr *udp;
 267         struct tcp_hdr *tcp;
 268         uint16_t len;
 269         static const uint8_t next_proto[] = {
 270                 [RTE_ETH_FLOW_NONFRAG_IPV4_TCP] = IPPROTO_TCP,
 271                 [RTE_ETH_FLOW_NONFRAG_IPV4_UDP] = IPPROTO_UDP,
 272                 [RTE_ETH_FLOW_NONFRAG_IPV6_TCP] = IPPROTO_TCP,
 273                 [RTE_ETH_FLOW_NONFRAG_IPV6_UDP] = IPPROTO_UDP,
 274         };
 275         raw_pkt = (uint8_t *)buff;
 276         input = &fdir->input;
 277         DP_INFO(edev, "flow_type %d\n", input->flow_type);
 278
 279         len =  2 * sizeof(struct ether_addr);
 280         raw_pkt += 2 * sizeof(struct ether_addr);
 281         if (input->flow_ext.vlan_tci) {
 282                 DP_INFO(edev, "adding VLAN header\n");
 283                 rte_memcpy(raw_pkt, vlan_frame, sizeof(vlan_frame));
 284                 rte_memcpy(raw_pkt + sizeof(uint16_t),
 285                            &input->flow_ext.vlan_tci,
 286                            sizeof(uint16_t));
 287                 raw_pkt += sizeof(vlan_frame);
 288                 len += sizeof(vlan_frame);
 289         }
 290         ether_type = (uint16_t *)raw_pkt;
 291         raw_pkt += sizeof(uint16_t);
 292         len += sizeof(uint16_t);
 293
 294         switch (input->flow_type) {
 295         case RTE_ETH_FLOW_NONFRAG_IPV4_TCP:
 296         case RTE_ETH_FLOW_NONFRAG_IPV4_UDP:
 297                 /* fill the common ip header */
 298                 ip = (struct ipv4_hdr *)raw_pkt;
 299                 *ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
 300                 ip->version_ihl = QEDE_FDIR_IP_DEFAULT_VERSION_IHL;
 301                 ip->total_length = sizeof(struct ipv4_hdr);
 302                 ip->next_proto_id = input->flow.ip4_flow.proto ?
 303                                     input->flow.ip4_flow.proto :
 304                                     next_proto[input->flow_type];
 305                 ip->time_to_live = input->flow.ip4_flow.ttl ?
 306                                    input->flow.ip4_flow.ttl :
 307                                    QEDE_FDIR_IPV4_DEF_TTL;
 308                 ip->type_of_service = input->flow.ip4_flow.tos;
 309                 ip->dst_addr = input->flow.ip4_flow.dst_ip;
 310                 ip->src_addr = input->flow.ip4_flow.src_ip;
 311                 len += sizeof(struct ipv4_hdr);
 312                 params->ipv4 = true;
 313
 314                 raw_pkt = (uint8_t *)buff;
 315                 /* UDP */
 316                 if (input->flow_type == RTE_ETH_FLOW_NONFRAG_IPV4_UDP) {
 317                         udp = (struct udp_hdr *)(raw_pkt + len);
 318                         udp->dst_port = input->flow.udp4_flow.dst_port;
 319                         udp->src_port = input->flow.udp4_flow.src_port;
 320                         udp->dgram_len = sizeof(struct udp_hdr);
 321                         len += sizeof(struct udp_hdr);
 322                         /* adjust ip total_length */
 323                         ip->total_length += sizeof(struct udp_hdr);
 324                         params->udp = true;
 325                 } else { /* TCP */
 326                         tcp = (struct tcp_hdr *)(raw_pkt + len);
 327                         tcp->src_port = input->flow.tcp4_flow.src_port;
 328                         tcp->dst_port = input->flow.tcp4_flow.dst_port;
 329                         tcp->data_off = QEDE_FDIR_TCP_DEFAULT_DATAOFF;
 330                         len += sizeof(struct tcp_hdr);
 331                         /* adjust ip total_length */
 332                         ip->total_length += sizeof(struct tcp_hdr);
 333                         params->tcp = true;
 334                 }
 335                 break;
 336         case RTE_ETH_FLOW_NONFRAG_IPV6_TCP:
 337         case RTE_ETH_FLOW_NONFRAG_IPV6_UDP:
 338                 ip6 = (struct ipv6_hdr *)raw_pkt;
 339                 *ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv6);
 340                 ip6->proto = input->flow.ipv6_flow.proto ?
 341                                         input->flow.ipv6_flow.proto :
 342                                         next_proto[input->flow_type];
 343                 rte_memcpy(&ip6->src_addr, &input->flow.ipv6_flow.dst_ip,
 344                            IPV6_ADDR_LEN);
 345                 rte_memcpy(&ip6->dst_addr, &input->flow.ipv6_flow.src_ip,
 346                            IPV6_ADDR_LEN);
 347                 len += sizeof(struct ipv6_hdr);
 348
 349                 raw_pkt = (uint8_t *)buff;
 350                 /* UDP */
 351                 if (input->flow_type == RTE_ETH_FLOW_NONFRAG_IPV6_UDP) {
 352                         udp = (struct udp_hdr *)(raw_pkt + len);
 353                         udp->src_port = input->flow.udp6_flow.dst_port;
 354                         udp->dst_port = input->flow.udp6_flow.src_port;
 355                         len += sizeof(struct udp_hdr);
 356                         params->udp = true;
 357                 } else { /* TCP */
 358                         tcp = (struct tcp_hdr *)(raw_pkt + len);
 359                         tcp->src_port = input->flow.tcp4_flow.src_port;
 360                         tcp->dst_port = input->flow.tcp4_flow.dst_port;
 361                         tcp->data_off = QEDE_FDIR_TCP_DEFAULT_DATAOFF;
 362                         len += sizeof(struct tcp_hdr);
 363                         params->tcp = true;
 364                 }
 365                 break;
 366         default:
 367                 DP_ERR(edev, "Unsupported flow_type %u\n",
 368                        input->flow_type);
 369                 return 0;
 370         }
 371
 372         return len;
 373 }
 374
 375 int
 376 qede_fdir_filter_conf(struct rte_eth_dev *eth_dev,
 377                       enum rte_filter_op filter_op,
 378                       void *arg)
 379 {
 380         struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
 381         struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
 382         struct rte_eth_fdir_filter *fdir;
 383         int ret;
 384
 385         fdir = (struct rte_eth_fdir_filter *)arg;
 386         switch (filter_op) {
 387         case RTE_ETH_FILTER_NOP:
 388                 /* Typically used to query flowdir support */
 389                 if (ECORE_IS_CMT(edev)) {
 390                         DP_ERR(edev, "flowdir is not supported in 100G mode\n");
 391                         return -ENOTSUP;
 392                 }
 393                 return 0; /* means supported */
 394         case RTE_ETH_FILTER_ADD:
 395                 ret = qede_fdir_filter_add(eth_dev, fdir, 1);
 396         break;
 397         case RTE_ETH_FILTER_DELETE:
 398                 ret = qede_fdir_filter_add(eth_dev, fdir, 0);
 399         break;
 400         case RTE_ETH_FILTER_FLUSH:
 401         case RTE_ETH_FILTER_UPDATE:
 402         case RTE_ETH_FILTER_INFO:
 403                 return -ENOTSUP;
 404         break;
 405         default:
 406                 DP_ERR(edev, "unknown operation %u", filter_op);
 407                 ret = -EINVAL;
 408         }
 409
 410         return ret;
 411 }
 412
 413 int qede_ntuple_filter_conf(struct rte_eth_dev *eth_dev,
 414                             enum rte_filter_op filter_op,
 415                             void *arg)
 416 {
 417         struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
 418         struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
 419         struct rte_eth_ntuple_filter *ntuple;
 420         struct rte_eth_fdir_filter fdir_entry;
 421         struct rte_eth_tcpv4_flow *tcpv4_flow;
 422         struct rte_eth_udpv4_flow *udpv4_flow;
 423         bool add = false;
 424
 425         switch (filter_op) {
 426         case RTE_ETH_FILTER_NOP:
 427                 /* Typically used to query fdir support */
 428                 if (ECORE_IS_CMT(edev)) {
 429                         DP_ERR(edev, "flowdir is not supported in 100G mode\n");
 430                         return -ENOTSUP;
 431                 }
 432                 return 0; /* means supported */
 433         case RTE_ETH_FILTER_ADD:
 434                 add = true;
 435         break;
 436         case RTE_ETH_FILTER_DELETE:
 437         break;
 438         case RTE_ETH_FILTER_INFO:
 439         case RTE_ETH_FILTER_GET:
 440         case RTE_ETH_FILTER_UPDATE:
 441         case RTE_ETH_FILTER_FLUSH:
 442         case RTE_ETH_FILTER_SET:
 443         case RTE_ETH_FILTER_STATS:
 444         case RTE_ETH_FILTER_OP_MAX:
 445                 DP_ERR(edev, "Unsupported filter_op %d\n", filter_op);
 446                 return -ENOTSUP;
 447         }
 448         ntuple = (struct rte_eth_ntuple_filter *)arg;
 449         /* Internally convert ntuple to fdir entry */
 450         memset(&fdir_entry, 0, sizeof(fdir_entry));
 451         if (ntuple->proto == IPPROTO_TCP) {
 452                 fdir_entry.input.flow_type = RTE_ETH_FLOW_NONFRAG_IPV4_TCP;
 453                 tcpv4_flow = &fdir_entry.input.flow.tcp4_flow;
 454                 tcpv4_flow->ip.src_ip = ntuple->src_ip;
 455                 tcpv4_flow->ip.dst_ip = ntuple->dst_ip;
 456                 tcpv4_flow->ip.proto = IPPROTO_TCP;
 457                 tcpv4_flow->src_port = ntuple->src_port;
 458                 tcpv4_flow->dst_port = ntuple->dst_port;
 459         } else {
 460                 fdir_entry.input.flow_type = RTE_ETH_FLOW_NONFRAG_IPV4_UDP;
 461                 udpv4_flow = &fdir_entry.input.flow.udp4_flow;
 462                 udpv4_flow->ip.src_ip = ntuple->src_ip;
 463                 udpv4_flow->ip.dst_ip = ntuple->dst_ip;
 464                 udpv4_flow->ip.proto = IPPROTO_TCP;
 465                 udpv4_flow->src_port = ntuple->src_port;
 466                 udpv4_flow->dst_port = ntuple->dst_port;
 467         }
 468
 469         fdir_entry.action.rx_queue = ntuple->queue;
 470
 471         return qede_config_cmn_fdir_filter(eth_dev, &fdir_entry, add);
 472 }