drivers/net/ethernet/intel/iavf/iavf_adv_rss.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2021, Intel Corporation. */
   3
   4 /* advanced RSS configuration ethtool support for iavf */
   5
   6 #include "iavf.h"
   7
   8 /**
   9  * iavf_fill_adv_rss_ip4_hdr - fill the IPv4 RSS protocol header
  10  * @hdr: the virtchnl message protocol header data structure
  11  * @hash_flds: the RSS configuration protocol hash fields
  12  */
  13 static void
  14 iavf_fill_adv_rss_ip4_hdr(struct virtchnl_proto_hdr *hdr, u64 hash_flds)
  15 {
  16         VIRTCHNL_SET_PROTO_HDR_TYPE(hdr, IPV4);
  17
  18         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_IPV4_SA)
  19                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, IPV4, SRC);
  20
  21         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_IPV4_DA)
  22                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, IPV4, DST);
  23 }
  24
  25 /**
  26  * iavf_fill_adv_rss_ip6_hdr - fill the IPv6 RSS protocol header
  27  * @hdr: the virtchnl message protocol header data structure
  28  * @hash_flds: the RSS configuration protocol hash fields
  29  */
  30 static void
  31 iavf_fill_adv_rss_ip6_hdr(struct virtchnl_proto_hdr *hdr, u64 hash_flds)
  32 {
  33         VIRTCHNL_SET_PROTO_HDR_TYPE(hdr, IPV6);
  34
  35         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_IPV6_SA)
  36                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, IPV6, SRC);
  37
  38         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_IPV6_DA)
  39                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, IPV6, DST);
  40 }
  41
  42 /**
  43  * iavf_fill_adv_rss_tcp_hdr - fill the TCP RSS protocol header
  44  * @hdr: the virtchnl message protocol header data structure
  45  * @hash_flds: the RSS configuration protocol hash fields
  46  */
  47 static void
  48 iavf_fill_adv_rss_tcp_hdr(struct virtchnl_proto_hdr *hdr, u64 hash_flds)
  49 {
  50         VIRTCHNL_SET_PROTO_HDR_TYPE(hdr, TCP);
  51
  52         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_TCP_SRC_PORT)
  53                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, TCP, SRC_PORT);
  54
  55         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_TCP_DST_PORT)
  56                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, TCP, DST_PORT);
  57 }
  58
  59 /**
  60  * iavf_fill_adv_rss_udp_hdr - fill the UDP RSS protocol header
  61  * @hdr: the virtchnl message protocol header data structure
  62  * @hash_flds: the RSS configuration protocol hash fields
  63  */
  64 static void
  65 iavf_fill_adv_rss_udp_hdr(struct virtchnl_proto_hdr *hdr, u64 hash_flds)
  66 {
  67         VIRTCHNL_SET_PROTO_HDR_TYPE(hdr, UDP);
  68
  69         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_UDP_SRC_PORT)
  70                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, UDP, SRC_PORT);
  71
  72         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_UDP_DST_PORT)
  73                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, UDP, DST_PORT);
  74 }
  75
  76 /**
  77  * iavf_fill_adv_rss_sctp_hdr - fill the SCTP RSS protocol header
  78  * @hdr: the virtchnl message protocol header data structure
  79  * @hash_flds: the RSS configuration protocol hash fields
  80  */
  81 static void
  82 iavf_fill_adv_rss_sctp_hdr(struct virtchnl_proto_hdr *hdr, u64 hash_flds)
  83 {
  84         VIRTCHNL_SET_PROTO_HDR_TYPE(hdr, SCTP);
  85
  86         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_SCTP_SRC_PORT)
  87                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, SCTP, SRC_PORT);
  88
  89         if (hash_flds & IAVF_ADV_RSS_HASH_FLD_SCTP_DST_PORT)
  90                 VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, SCTP, DST_PORT);
  91 }
  92
  93 /**
  94  * iavf_fill_adv_rss_cfg_msg - fill the RSS configuration into virtchnl message
  95  * @rss_cfg: the virtchnl message to be filled with RSS configuration setting
  96  * @packet_hdrs: the RSS configuration protocol header types
  97  * @hash_flds: the RSS configuration protocol hash fields
  98  * @symm: if true, symmetric hash is required
  99  *
 100  * Returns 0 if the RSS configuration virtchnl message is filled successfully
 101  */
 102 int
 103 iavf_fill_adv_rss_cfg_msg(struct virtchnl_rss_cfg *rss_cfg,
 104                           u32 packet_hdrs, u64 hash_flds, bool symm)
 105 {
 106         struct virtchnl_proto_hdrs *proto_hdrs = &rss_cfg->proto_hdrs;
 107         struct virtchnl_proto_hdr *hdr;
 108
 109         if (symm)
 110                 rss_cfg->rss_algorithm = VIRTCHNL_RSS_ALG_TOEPLITZ_SYMMETRIC;
 111         else
 112                 rss_cfg->rss_algorithm = VIRTCHNL_RSS_ALG_TOEPLITZ_ASYMMETRIC;
 113
 114         proto_hdrs->tunnel_level = 0;   /* always outer layer */
 115
 116         hdr = &proto_hdrs->proto_hdr[proto_hdrs->count++];
 117         switch (packet_hdrs & IAVF_ADV_RSS_FLOW_SEG_HDR_L3) {
 118         case IAVF_ADV_RSS_FLOW_SEG_HDR_IPV4:
 119                 iavf_fill_adv_rss_ip4_hdr(hdr, hash_flds);
 120                 break;
 121         case IAVF_ADV_RSS_FLOW_SEG_HDR_IPV6:
 122                 iavf_fill_adv_rss_ip6_hdr(hdr, hash_flds);
 123                 break;
 124         default:
 125                 return -EINVAL;
 126         }
 127
 128         hdr = &proto_hdrs->proto_hdr[proto_hdrs->count++];
 129         switch (packet_hdrs & IAVF_ADV_RSS_FLOW_SEG_HDR_L4) {
 130         case IAVF_ADV_RSS_FLOW_SEG_HDR_TCP:
 131                 iavf_fill_adv_rss_tcp_hdr(hdr, hash_flds);
 132                 break;
 133         case IAVF_ADV_RSS_FLOW_SEG_HDR_UDP:
 134                 iavf_fill_adv_rss_udp_hdr(hdr, hash_flds);
 135                 break;
 136         case IAVF_ADV_RSS_FLOW_SEG_HDR_SCTP:
 137                 iavf_fill_adv_rss_sctp_hdr(hdr, hash_flds);
 138                 break;
 139         default:
 140                 return -EINVAL;
 141         }
 142
 143         return 0;
 144 }
 145
 146 /**
 147  * iavf_find_adv_rss_cfg_by_hdrs - find RSS configuration with header type
 148  * @adapter: pointer to the VF adapter structure
 149  * @packet_hdrs: protocol header type to find.
 150  *
 151  * Returns pointer to advance RSS configuration if found or null
 152  */
 153 struct iavf_adv_rss *
 154 iavf_find_adv_rss_cfg_by_hdrs(struct iavf_adapter *adapter, u32 packet_hdrs)
 155 {
 156         struct iavf_adv_rss *rss;
 157
 158         list_for_each_entry(rss, &adapter->adv_rss_list_head, list)
 159                 if (rss->packet_hdrs == packet_hdrs)
 160                         return rss;
 161
 162         return NULL;
 163 }
 164
 165 /**
 166  * iavf_print_adv_rss_cfg
 167  * @adapter: pointer to the VF adapter structure
 168  * @rss: pointer to the advance RSS configuration to print
 169  * @action: the string description about how to handle the RSS
 170  * @result: the string description about the virtchnl result
 171  *
 172  * Print the advance RSS configuration
 173  **/
 174 void
 175 iavf_print_adv_rss_cfg(struct iavf_adapter *adapter, struct iavf_adv_rss *rss,
 176                        const char *action, const char *result)
 177 {
 178         u32 packet_hdrs = rss->packet_hdrs;
 179         u64 hash_flds = rss->hash_flds;
 180         static char hash_opt[300];
 181         const char *proto;
 182
 183         if (packet_hdrs & IAVF_ADV_RSS_FLOW_SEG_HDR_TCP)
 184                 proto = "TCP";
 185         else if (packet_hdrs & IAVF_ADV_RSS_FLOW_SEG_HDR_UDP)
 186                 proto = "UDP";
 187         else if (packet_hdrs & IAVF_ADV_RSS_FLOW_SEG_HDR_SCTP)
 188                 proto = "SCTP";
 189         else
 190                 return;
 191
 192         memset(hash_opt, 0, sizeof(hash_opt));
 193
 194         strcat(hash_opt, proto);
 195         if (packet_hdrs & IAVF_ADV_RSS_FLOW_SEG_HDR_IPV4)
 196                 strcat(hash_opt, "v4 ");
 197         else
 198                 strcat(hash_opt, "v6 ");
 199
 200         if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_IPV4_SA |
 201                          IAVF_ADV_RSS_HASH_FLD_IPV6_SA))
 202                 strcat(hash_opt, "IP SA,");
 203         if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_IPV4_DA |
 204                          IAVF_ADV_RSS_HASH_FLD_IPV6_DA))
 205                 strcat(hash_opt, "IP DA,");
 206         if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_TCP_SRC_PORT |
 207                          IAVF_ADV_RSS_HASH_FLD_UDP_SRC_PORT |
 208                          IAVF_ADV_RSS_HASH_FLD_SCTP_SRC_PORT))
 209                 strcat(hash_opt, "src port,");
 210         if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_TCP_DST_PORT |
 211                          IAVF_ADV_RSS_HASH_FLD_UDP_DST_PORT |
 212                          IAVF_ADV_RSS_HASH_FLD_SCTP_DST_PORT))
 213                 strcat(hash_opt, "dst port,");
 214
 215         if (!action)
 216                 action = "";
 217
 218         if (!result)
 219                 result = "";
 220
 221         dev_info(&adapter->pdev->dev, "%s %s %s\n", action, hash_opt, result);
 222 }