drivers/net/enic/enic_rxtx_common.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2008-2018 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  */
   5
   6 #ifndef _ENIC_RXTX_COMMON_H_
   7 #define _ENIC_RXTX_COMMON_H_
   8
   9 #include <rte_byteorder.h>
  10
  11 static inline uint16_t
  12 enic_cq_rx_desc_ciflags(struct cq_enet_rq_desc *crd)
  13 {
  14         return rte_le_to_cpu_16(crd->completed_index_flags) &
  15                                 ~CQ_DESC_COMP_NDX_MASK;
  16 }
  17
  18 static inline uint16_t
  19 enic_cq_rx_desc_bwflags(struct cq_enet_rq_desc *crd)
  20 {
  21         return rte_le_to_cpu_16(crd->bytes_written_flags) &
  22                            ~CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
  23 }
  24
  25 static inline uint8_t
  26 enic_cq_rx_desc_packet_error(uint16_t bwflags)
  27 {
  28         return (bwflags & CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ==
  29                 CQ_ENET_RQ_DESC_FLAGS_TRUNCATED;
  30 }
  31
  32 static inline uint8_t
  33 enic_cq_rx_desc_eop(uint16_t ciflags)
  34 {
  35         return (ciflags & CQ_ENET_RQ_DESC_FLAGS_EOP)
  36                 == CQ_ENET_RQ_DESC_FLAGS_EOP;
  37 }
  38
  39 static inline uint8_t
  40 enic_cq_rx_desc_csum_not_calc(struct cq_enet_rq_desc *cqrd)
  41 {
  42         return (rte_le_to_cpu_16(cqrd->q_number_rss_type_flags) &
  43                 CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ==
  44                 CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC;
  45 }
  46
  47 static inline uint8_t
  48 enic_cq_rx_desc_ipv4_csum_ok(struct cq_enet_rq_desc *cqrd)
  49 {
  50         return (cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ==
  51                 CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK;
  52 }
  53
  54 static inline uint8_t
  55 enic_cq_rx_desc_tcp_udp_csum_ok(struct cq_enet_rq_desc *cqrd)
  56 {
  57         return (cqrd->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ==
  58                 CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK;
  59 }
  60
  61 static inline uint8_t
  62 enic_cq_rx_desc_rss_type(struct cq_enet_rq_desc *cqrd)
  63 {
  64         return (uint8_t)((rte_le_to_cpu_16(cqrd->q_number_rss_type_flags) >>
  65                 CQ_DESC_Q_NUM_BITS) & CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
  66 }
  67
  68 static inline uint32_t
  69 enic_cq_rx_desc_rss_hash(struct cq_enet_rq_desc *cqrd)
  70 {
  71         return rte_le_to_cpu_32(cqrd->rss_hash);
  72 }
  73
  74 static inline uint16_t
  75 enic_cq_rx_desc_vlan(struct cq_enet_rq_desc *cqrd)
  76 {
  77         return rte_le_to_cpu_16(cqrd->vlan);
  78 }
  79
  80 static inline uint16_t
  81 enic_cq_rx_desc_n_bytes(struct cq_desc *cqd)
  82 {
  83         struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
  84         return rte_le_to_cpu_16(cqrd->bytes_written_flags) &
  85                 CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
  86 }
  87
  88
  89 static inline uint8_t
  90 enic_cq_rx_check_err(struct cq_desc *cqd)
  91 {
  92         struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
  93         uint16_t bwflags;
  94
  95         bwflags = enic_cq_rx_desc_bwflags(cqrd);
  96         if (unlikely(enic_cq_rx_desc_packet_error(bwflags)))
  97                 return 1;
  98         return 0;
  99 }
 100
 101 /* Lookup table to translate RX CQ flags to mbuf flags. */
 102 static uint32_t
 103 enic_cq_rx_flags_to_pkt_type(struct cq_desc *cqd, uint8_t tnl)
 104 {
 105         struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
 106         uint8_t cqrd_flags = cqrd->flags;
 107         /*
 108          * Odd-numbered entries are for tunnel packets. All packet type info
 109          * applies to the inner packet, and there is no info on the outer
 110          * packet. The outer flags in these entries exist only to avoid
 111          * changing enic_cq_rx_to_pkt_flags(). They are cleared from mbuf
 112          * afterwards.
 113          *
 114          * Also, as there is no tunnel type info (VXLAN, NVGRE, or GENEVE), set
 115          * RTE_PTYPE_TUNNEL_GRENAT..
 116          */
 117         static const uint32_t cq_type_table[128] __rte_cache_aligned = {
 118                 [0x00] = RTE_PTYPE_UNKNOWN,
 119                 [0x01] = RTE_PTYPE_UNKNOWN |
 120                          RTE_PTYPE_TUNNEL_GRENAT |
 121                          RTE_PTYPE_INNER_L2_ETHER,
 122                 [0x20] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_NONFRAG,
 123                 [0x21] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_NONFRAG |
 124                          RTE_PTYPE_TUNNEL_GRENAT |
 125                          RTE_PTYPE_INNER_L2_ETHER |
 126                          RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
 127                          RTE_PTYPE_INNER_L4_NONFRAG,
 128                 [0x22] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_UDP,
 129                 [0x23] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_UDP |
 130                          RTE_PTYPE_TUNNEL_GRENAT |
 131                          RTE_PTYPE_INNER_L2_ETHER |
 132                          RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
 133                          RTE_PTYPE_INNER_L4_UDP,
 134                 [0x24] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_TCP,
 135                 [0x25] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_TCP |
 136                          RTE_PTYPE_TUNNEL_GRENAT |
 137                          RTE_PTYPE_INNER_L2_ETHER |
 138                          RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
 139                          RTE_PTYPE_INNER_L4_TCP,
 140                 [0x60] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
 141                 [0x61] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG |
 142                          RTE_PTYPE_TUNNEL_GRENAT |
 143                          RTE_PTYPE_INNER_L2_ETHER |
 144                          RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
 145                          RTE_PTYPE_INNER_L4_FRAG,
 146                 [0x62] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
 147                 [0x63] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG |
 148                          RTE_PTYPE_TUNNEL_GRENAT |
 149                          RTE_PTYPE_INNER_L2_ETHER |
 150                          RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
 151                          RTE_PTYPE_INNER_L4_FRAG,
 152                 [0x64] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
 153                 [0x65] = RTE_PTYPE_L3_IPV4_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG |
 154                          RTE_PTYPE_TUNNEL_GRENAT |
 155                          RTE_PTYPE_INNER_L2_ETHER |
 156                          RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN |
 157                          RTE_PTYPE_INNER_L4_FRAG,
 158                 [0x10] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_NONFRAG,
 159                 [0x11] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_NONFRAG |
 160                          RTE_PTYPE_TUNNEL_GRENAT |
 161                          RTE_PTYPE_INNER_L2_ETHER |
 162                          RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
 163                          RTE_PTYPE_INNER_L4_NONFRAG,
 164                 [0x12] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_UDP,
 165                 [0x13] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_UDP |
 166                          RTE_PTYPE_TUNNEL_GRENAT |
 167                          RTE_PTYPE_INNER_L2_ETHER |
 168                          RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
 169                          RTE_PTYPE_INNER_L4_UDP,
 170                 [0x14] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_TCP,
 171                 [0x15] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_TCP |
 172                          RTE_PTYPE_TUNNEL_GRENAT |
 173                          RTE_PTYPE_INNER_L2_ETHER |
 174                          RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
 175                          RTE_PTYPE_INNER_L4_TCP,
 176                 [0x50] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
 177                 [0x51] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG |
 178                          RTE_PTYPE_TUNNEL_GRENAT |
 179                          RTE_PTYPE_INNER_L2_ETHER |
 180                          RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
 181                          RTE_PTYPE_INNER_L4_FRAG,
 182                 [0x52] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
 183                 [0x53] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG |
 184                          RTE_PTYPE_TUNNEL_GRENAT |
 185                          RTE_PTYPE_INNER_L2_ETHER |
 186                          RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
 187                          RTE_PTYPE_INNER_L4_FRAG,
 188                 [0x54] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG,
 189                 [0x55] = RTE_PTYPE_L3_IPV6_EXT_UNKNOWN | RTE_PTYPE_L4_FRAG |
 190                          RTE_PTYPE_TUNNEL_GRENAT |
 191                          RTE_PTYPE_INNER_L2_ETHER |
 192                          RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN |
 193                          RTE_PTYPE_INNER_L4_FRAG,
 194                 /* All others reserved */
 195         };
 196         cqrd_flags &= CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT
 197                 | CQ_ENET_RQ_DESC_FLAGS_IPV4 | CQ_ENET_RQ_DESC_FLAGS_IPV6
 198                 | CQ_ENET_RQ_DESC_FLAGS_TCP | CQ_ENET_RQ_DESC_FLAGS_UDP;
 199         return cq_type_table[cqrd_flags + tnl];
 200 }
 201
 202 static void
 203 enic_cq_rx_to_pkt_flags(struct cq_desc *cqd, struct rte_mbuf *mbuf)
 204 {
 205         struct cq_enet_rq_desc *cqrd = (struct cq_enet_rq_desc *)cqd;
 206         uint16_t bwflags, pkt_flags = 0, vlan_tci;
 207         bwflags = enic_cq_rx_desc_bwflags(cqrd);
 208         vlan_tci = enic_cq_rx_desc_vlan(cqrd);
 209
 210         /* VLAN STRIPPED flag. The L2 packet type updated here also */
 211         if (bwflags & CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) {
 212                 pkt_flags |= RTE_MBUF_F_RX_VLAN | RTE_MBUF_F_RX_VLAN_STRIPPED;
 213                 mbuf->packet_type |= RTE_PTYPE_L2_ETHER;
 214         } else {
 215                 if (vlan_tci != 0) {
 216                         pkt_flags |= RTE_MBUF_F_RX_VLAN;
 217                         mbuf->packet_type |= RTE_PTYPE_L2_ETHER_VLAN;
 218                 } else {
 219                         mbuf->packet_type |= RTE_PTYPE_L2_ETHER;
 220                 }
 221         }
 222         mbuf->vlan_tci = vlan_tci;
 223
 224         if ((cqd->type_color & CQ_DESC_TYPE_MASK) == CQ_DESC_TYPE_CLASSIFIER) {
 225                 struct cq_enet_rq_clsf_desc *clsf_cqd;
 226                 uint16_t filter_id;
 227                 clsf_cqd = (struct cq_enet_rq_clsf_desc *)cqd;
 228                 filter_id = clsf_cqd->filter_id;
 229                 if (filter_id) {
 230                         pkt_flags |= RTE_MBUF_F_RX_FDIR;
 231                         if (filter_id != ENIC_MAGIC_FILTER_ID) {
 232                                 /* filter_id = mark id + 1, so subtract 1 */
 233                                 mbuf->hash.fdir.hi = filter_id - 1;
 234                                 pkt_flags |= RTE_MBUF_F_RX_FDIR_ID;
 235                         }
 236                 }
 237         } else if (enic_cq_rx_desc_rss_type(cqrd)) {
 238                 /* RSS flag */
 239                 pkt_flags |= RTE_MBUF_F_RX_RSS_HASH;
 240                 mbuf->hash.rss = enic_cq_rx_desc_rss_hash(cqrd);
 241         }
 242
 243         /* checksum flags */
 244         if (mbuf->packet_type & (RTE_PTYPE_L3_IPV4 | RTE_PTYPE_L3_IPV6)) {
 245                 if (!enic_cq_rx_desc_csum_not_calc(cqrd)) {
 246                         uint32_t l4_flags;
 247                         l4_flags = mbuf->packet_type & RTE_PTYPE_L4_MASK;
 248
 249                         /*
 250                          * When overlay offload is enabled, the NIC may
 251                          * set ipv4_csum_ok=1 if the inner packet is IPv6..
 252                          * So, explicitly check for IPv4 before checking
 253                          * ipv4_csum_ok.
 254                          */
 255                         if (mbuf->packet_type & RTE_PTYPE_L3_IPV4) {
 256                                 if (enic_cq_rx_desc_ipv4_csum_ok(cqrd))
 257                                         pkt_flags |= RTE_MBUF_F_RX_IP_CKSUM_GOOD;
 258                                 else
 259                                         pkt_flags |= RTE_MBUF_F_RX_IP_CKSUM_BAD;
 260                         }
 261
 262                         if (l4_flags == RTE_PTYPE_L4_UDP ||
 263                             l4_flags == RTE_PTYPE_L4_TCP) {
 264                                 if (enic_cq_rx_desc_tcp_udp_csum_ok(cqrd))
 265                                         pkt_flags |= RTE_MBUF_F_RX_L4_CKSUM_GOOD;
 266                                 else
 267                                         pkt_flags |= RTE_MBUF_F_RX_L4_CKSUM_BAD;
 268                         }
 269                 }
 270         }
 271
 272         mbuf->ol_flags = pkt_flags;
 273 }
 274
 275 #endif /* _ENIC_RXTX_COMMON_H_ */