#include <rte_ether.h>
+#define NIX_RX_OFFLOAD_NONE (0)
+#define NIX_RX_OFFLOAD_RSS_F BIT(0)
#define NIX_RX_OFFLOAD_PTYPE_F BIT(1)
+#define NIX_RX_OFFLOAD_CHECKSUM_F BIT(2)
+#define NIX_RX_OFFLOAD_MARK_UPDATE_F BIT(3)
+
+/* Flags to control cqe_to_mbuf conversion function.
+ * Defining it from backwards to denote its been
+ * not used as offload flags to pick function
+ */
+#define NIX_RX_MULTI_SEG_F BIT(15)
+
+#define CNXK_NIX_CQ_ENTRY_SZ 128
+#define NIX_DESCS_PER_LOOP 4
+#define CQE_CAST(x) ((struct nix_cqe_hdr_s *)(x))
+#define CQE_SZ(x) ((x) * CNXK_NIX_CQ_ENTRY_SZ)
+
+union mbuf_initializer {
+ struct {
+ uint16_t data_off;
+ uint16_t refcnt;
+ uint16_t nb_segs;
+ uint16_t port;
+ } fields;
+ uint64_t value;
+};
+
+static __rte_always_inline uint64_t
+nix_clear_data_off(uint64_t oldval)
+{
+ union mbuf_initializer mbuf_init = {.value = oldval};
+
+ mbuf_init.fields.data_off = 0;
+ return mbuf_init.value;
+}
+
+static __rte_always_inline struct rte_mbuf *
+nix_get_mbuf_from_cqe(void *cq, const uint64_t data_off)
+{
+ rte_iova_t buff;
+
+ /* Skip CQE, NIX_RX_PARSE_S and SG HDR(9 DWORDs) and peek buff addr */
+ buff = *((rte_iova_t *)((uint64_t *)cq + 9));
+ return (struct rte_mbuf *)(buff - data_off);
+}
+
+static __rte_always_inline uint32_t
+nix_ptype_get(const void *const lookup_mem, const uint64_t in)
+{
+ const uint16_t *const ptype = lookup_mem;
+ const uint16_t lh_lg_lf = (in & 0xFFF0000000000000) >> 52;
+ const uint16_t tu_l2 = ptype[(in & 0x000FFFF000000000) >> 36];
+ const uint16_t il4_tu = ptype[PTYPE_NON_TUNNEL_ARRAY_SZ + lh_lg_lf];
+
+ return (il4_tu << PTYPE_NON_TUNNEL_WIDTH) | tu_l2;
+}
+
+static __rte_always_inline uint32_t
+nix_rx_olflags_get(const void *const lookup_mem, const uint64_t in)
+{
+ const uint32_t *const ol_flags =
+ (const uint32_t *)((const uint8_t *)lookup_mem +
+ PTYPE_ARRAY_SZ);
+
+ return ol_flags[(in & 0xfff00000) >> 20];
+}
+
+static inline uint64_t
+nix_update_match_id(const uint16_t match_id, uint64_t ol_flags,
+ struct rte_mbuf *mbuf)
+{
+ /* There is no separate bit to check match_id
+ * is valid or not? and no flag to identify it is an
+ * RTE_FLOW_ACTION_TYPE_FLAG vs RTE_FLOW_ACTION_TYPE_MARK
+ * action. The former case addressed through 0 being invalid
+ * value and inc/dec match_id pair when MARK is activated.
+ * The later case addressed through defining
+ * CNXK_FLOW_MARK_DEFAULT as value for
+ * RTE_FLOW_ACTION_TYPE_MARK.
+ * This would translate to not use
+ * CNXK_FLOW_ACTION_FLAG_DEFAULT - 1 and
+ * CNXK_FLOW_ACTION_FLAG_DEFAULT for match_id.
+ * i.e valid mark_id's are from
+ * 0 to CNXK_FLOW_ACTION_FLAG_DEFAULT - 2
+ */
+ if (likely(match_id)) {
+ ol_flags |= PKT_RX_FDIR;
+ if (match_id != CNXK_FLOW_ACTION_FLAG_DEFAULT) {
+ ol_flags |= PKT_RX_FDIR_ID;
+ mbuf->hash.fdir.hi = match_id - 1;
+ }
+ }
+
+ return ol_flags;
+}
+
+static __rte_always_inline void
+cn9k_nix_cqe_to_mbuf(const struct nix_cqe_hdr_s *cq, const uint32_t tag,
+ struct rte_mbuf *mbuf, const void *lookup_mem,
+ const uint64_t val, const uint16_t flag)
+{
+ const union nix_rx_parse_u *rx =
+ (const union nix_rx_parse_u *)((const uint64_t *)cq + 1);
+ const uint16_t len = rx->cn9k.pkt_lenm1 + 1;
+ const uint64_t w1 = *(const uint64_t *)rx;
+ uint64_t ol_flags = 0;
+
+ /* Mark mempool obj as "get" as it is alloc'ed by NIX */
+ __mempool_check_cookies(mbuf->pool, (void **)&mbuf, 1, 1);
+
+ if (flag & NIX_RX_OFFLOAD_PTYPE_F)
+ mbuf->packet_type = nix_ptype_get(lookup_mem, w1);
+ else
+ mbuf->packet_type = 0;
+
+ if (flag & NIX_RX_OFFLOAD_RSS_F) {
+ mbuf->hash.rss = tag;
+ ol_flags |= PKT_RX_RSS_HASH;
+ }
+
+ if (flag & NIX_RX_OFFLOAD_CHECKSUM_F)
+ ol_flags |= nix_rx_olflags_get(lookup_mem, w1);
+
+ if (flag & NIX_RX_OFFLOAD_MARK_UPDATE_F)
+ ol_flags =
+ nix_update_match_id(rx->cn9k.match_id, ol_flags, mbuf);
+
+ mbuf->ol_flags = ol_flags;
+ *(uint64_t *)(&mbuf->rearm_data) = val;
+ mbuf->pkt_len = len;
+
+ mbuf->data_len = len;
+ mbuf->next = NULL;
+}
+
+static inline uint16_t
+nix_rx_nb_pkts(struct cn9k_eth_rxq *rxq, const uint64_t wdata,
+ const uint16_t pkts, const uint32_t qmask)
+{
+ uint32_t available = rxq->available;
+
+ /* Update the available count if cached value is not enough */
+ if (unlikely(available < pkts)) {
+ uint64_t reg, head, tail;
+
+ /* Use LDADDA version to avoid reorder */
+ reg = roc_atomic64_add_sync(wdata, rxq->cq_status);
+ /* CQ_OP_STATUS operation error */
+ if (reg & BIT_ULL(NIX_CQ_OP_STAT_OP_ERR) ||
+ reg & BIT_ULL(NIX_CQ_OP_STAT_CQ_ERR))
+ return 0;
+
+ tail = reg & 0xFFFFF;
+ head = (reg >> 20) & 0xFFFFF;
+ if (tail < head)
+ available = tail - head + qmask + 1;
+ else
+ available = tail - head;
+
+ rxq->available = available;
+ }
+
+ return RTE_MIN(pkts, available);
+}
+
+static __rte_always_inline uint16_t
+cn9k_nix_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts,
+ const uint16_t flags)
+{
+ struct cn9k_eth_rxq *rxq = rx_queue;
+ const uint64_t mbuf_init = rxq->mbuf_initializer;
+ const void *lookup_mem = rxq->lookup_mem;
+ const uint64_t data_off = rxq->data_off;
+ const uintptr_t desc = rxq->desc;
+ const uint64_t wdata = rxq->wdata;
+ const uint32_t qmask = rxq->qmask;
+ uint16_t packets = 0, nb_pkts;
+ uint32_t head = rxq->head;
+ struct nix_cqe_hdr_s *cq;
+ struct rte_mbuf *mbuf;
+
+ nb_pkts = nix_rx_nb_pkts(rxq, wdata, pkts, qmask);
+
+ while (packets < nb_pkts) {
+ /* Prefetch N desc ahead */
+ rte_prefetch_non_temporal(
+ (void *)(desc + (CQE_SZ((head + 2) & qmask))));
+ cq = (struct nix_cqe_hdr_s *)(desc + CQE_SZ(head));
+
+ mbuf = nix_get_mbuf_from_cqe(cq, data_off);
+
+ cn9k_nix_cqe_to_mbuf(cq, cq->tag, mbuf, lookup_mem, mbuf_init,
+ flags);
+ rx_pkts[packets++] = mbuf;
+ roc_prefetch_store_keep(mbuf);
+ head++;
+ head &= qmask;
+ }
+
+ rxq->head = head;
+ rxq->available -= nb_pkts;
+
+ /* Free all the CQs that we've processed */
+ plt_write64((wdata | nb_pkts), rxq->cq_door);
+
+ return nb_pkts;
+}
+
+#define RSS_F NIX_RX_OFFLOAD_RSS_F
+#define PTYPE_F NIX_RX_OFFLOAD_PTYPE_F
+#define CKSUM_F NIX_RX_OFFLOAD_CHECKSUM_F
+#define MARK_F NIX_RX_OFFLOAD_MARK_UPDATE_F
+
+/* [MARK] [CKSUM] [PTYPE] [RSS] */
+#define NIX_RX_FASTPATH_MODES \
+R(no_offload, 0, 0, 0, 0, NIX_RX_OFFLOAD_NONE) \
+R(rss, 0, 0, 0, 1, RSS_F) \
+R(ptype, 0, 0, 1, 0, PTYPE_F) \
+R(ptype_rss, 0, 0, 1, 1, PTYPE_F | RSS_F) \
+R(cksum, 0, 1, 0, 0, CKSUM_F) \
+R(cksum_rss, 0, 1, 0, 1, CKSUM_F | RSS_F) \
+R(cksum_ptype, 0, 1, 1, 0, CKSUM_F | PTYPE_F) \
+R(cksum_ptype_rss, 0, 1, 1, 1, CKSUM_F | PTYPE_F | RSS_F) \
+R(mark, 1, 0, 0, 0, MARK_F) \
+R(mark_rss, 1, 0, 0, 1, MARK_F | RSS_F) \
+R(mark_ptype, 1, 0, 1, 0, MARK_F | PTYPE_F) \
+R(mark_ptype_rss, 1, 0, 1, 1, MARK_F | PTYPE_F | RSS_F) \
+R(mark_cksum, 1, 1, 0, 0, MARK_F | CKSUM_F) \
+R(mark_cksum_rss, 1, 1, 0, 1, MARK_F | CKSUM_F | RSS_F) \
+R(mark_cksum_ptype, 1, 1, 1, 0, MARK_F | CKSUM_F | PTYPE_F)\
+R(mark_cksum_ptype_rss, 1, 1, 1, 1, MARK_F | CKSUM_F | PTYPE_F | RSS_F)
+
+#define R(name, f3, f2, f1, f0, flags) \
+ uint16_t __rte_noinline __rte_hot cn9k_nix_recv_pkts_##name( \
+ void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t pkts);
+
+NIX_RX_FASTPATH_MODES
+#undef R
#endif /* __CN9K_RX_H__ */
git.droids-corp.org / dpdk.git / commitdiff