drivers/event/cnxk/cn10k_worker.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(C) 2021 Marvell.
   3  */
   4
   5 #ifndef __CN10K_WORKER_H__
   6 #define __CN10K_WORKER_H__
   7
   8 #include <rte_vect.h>
   9
  10 #include "cnxk_ethdev.h"
  11 #include "cnxk_eventdev.h"
  12 #include "cnxk_worker.h"
  13
  14 #include "cn10k_ethdev.h"
  15 #include "cn10k_rx.h"
  16 #include "cn10k_tx.h"
  17
  18 /* SSO Operations */
  19
  20 static __rte_always_inline uint8_t
  21 cn10k_sso_hws_new_event(struct cn10k_sso_hws *ws, const struct rte_event *ev)
  22 {
  23         const uint32_t tag = (uint32_t)ev->event;
  24         const uint8_t new_tt = ev->sched_type;
  25         const uint64_t event_ptr = ev->u64;
  26         const uint16_t grp = ev->queue_id;
  27
  28         rte_atomic_thread_fence(__ATOMIC_ACQ_REL);
  29         if (ws->xaq_lmt <= *ws->fc_mem)
  30                 return 0;
  31
  32         cnxk_sso_hws_add_work(event_ptr, tag, new_tt, ws->grps_base[grp]);
  33         return 1;
  34 }
  35
  36 static __rte_always_inline void
  37 cn10k_sso_hws_fwd_swtag(struct cn10k_sso_hws *ws, const struct rte_event *ev)
  38 {
  39         const uint32_t tag = (uint32_t)ev->event;
  40         const uint8_t new_tt = ev->sched_type;
  41         const uint8_t cur_tt =
  42                 CNXK_TT_FROM_TAG(plt_read64(ws->base + SSOW_LF_GWS_WQE0));
  43
  44         /* CNXK model
  45          * cur_tt/new_tt     SSO_TT_ORDERED SSO_TT_ATOMIC SSO_TT_UNTAGGED
  46          *
  47          * SSO_TT_ORDERED        norm           norm             untag
  48          * SSO_TT_ATOMIC         norm           norm               untag
  49          * SSO_TT_UNTAGGED       norm           norm             NOOP
  50          */
  51
  52         if (new_tt == SSO_TT_UNTAGGED) {
  53                 if (cur_tt != SSO_TT_UNTAGGED)
  54                         cnxk_sso_hws_swtag_untag(ws->base +
  55                                                  SSOW_LF_GWS_OP_SWTAG_UNTAG);
  56         } else {
  57                 cnxk_sso_hws_swtag_norm(tag, new_tt,
  58                                         ws->base + SSOW_LF_GWS_OP_SWTAG_NORM);
  59         }
  60         ws->swtag_req = 1;
  61 }
  62
  63 static __rte_always_inline void
  64 cn10k_sso_hws_fwd_group(struct cn10k_sso_hws *ws, const struct rte_event *ev,
  65                         const uint16_t grp)
  66 {
  67         const uint32_t tag = (uint32_t)ev->event;
  68         const uint8_t new_tt = ev->sched_type;
  69
  70         plt_write64(ev->u64, ws->base + SSOW_LF_GWS_OP_UPD_WQP_GRP1);
  71         cnxk_sso_hws_swtag_desched(tag, new_tt, grp,
  72                                    ws->base + SSOW_LF_GWS_OP_SWTAG_DESCHED);
  73 }
  74
  75 static __rte_always_inline void
  76 cn10k_sso_hws_forward_event(struct cn10k_sso_hws *ws,
  77                             const struct rte_event *ev)
  78 {
  79         const uint8_t grp = ev->queue_id;
  80
  81         /* Group hasn't changed, Use SWTAG to forward the event */
  82         if (CNXK_GRP_FROM_TAG(plt_read64(ws->base + SSOW_LF_GWS_WQE0)) == grp)
  83                 cn10k_sso_hws_fwd_swtag(ws, ev);
  84         else
  85                 /*
  86                  * Group has been changed for group based work pipelining,
  87                  * Use deschedule/add_work operation to transfer the event to
  88                  * new group/core
  89                  */
  90                 cn10k_sso_hws_fwd_group(ws, ev, grp);
  91 }
  92
  93 static __rte_always_inline void
  94 cn10k_wqe_to_mbuf(uint64_t wqe, const uint64_t mbuf, uint8_t port_id,
  95                   const uint32_t tag, const uint32_t flags,
  96                   const void *const lookup_mem)
  97 {
  98         const uint64_t mbuf_init = 0x100010000ULL | RTE_PKTMBUF_HEADROOM |
  99                                    (flags & NIX_RX_OFFLOAD_TSTAMP_F ? 8 : 0);
 100
 101         cn10k_nix_cqe_to_mbuf((struct nix_cqe_hdr_s *)wqe, tag,
 102                               (struct rte_mbuf *)mbuf, lookup_mem,
 103                               mbuf_init | ((uint64_t)port_id) << 48, flags);
 104 }
 105
 106 static __rte_always_inline void
 107 cn10k_process_vwqe(uintptr_t vwqe, uint16_t port_id, const uint32_t flags,
 108                    void *lookup_mem, void *tstamp)
 109 {
 110         uint64_t mbuf_init = 0x100010000ULL | RTE_PKTMBUF_HEADROOM |
 111                              (flags & NIX_RX_OFFLOAD_TSTAMP_F ? 8 : 0);
 112         struct rte_event_vector *vec;
 113         uint16_t nb_mbufs, non_vec;
 114         uint64_t **wqe;
 115
 116         mbuf_init |= ((uint64_t)port_id) << 48;
 117         vec = (struct rte_event_vector *)vwqe;
 118         wqe = vec->u64s;
 119
 120         nb_mbufs = RTE_ALIGN_FLOOR(vec->nb_elem, NIX_DESCS_PER_LOOP);
 121         nb_mbufs = cn10k_nix_recv_pkts_vector(&mbuf_init, vec->mbufs, nb_mbufs,
 122                                               flags | NIX_RX_VWQE_F, lookup_mem,
 123                                               tstamp);
 124         wqe += nb_mbufs;
 125         non_vec = vec->nb_elem - nb_mbufs;
 126
 127         while (non_vec) {
 128                 struct nix_cqe_hdr_s *cqe = (struct nix_cqe_hdr_s *)wqe[0];
 129                 struct rte_mbuf *mbuf;
 130                 uint64_t tstamp_ptr;
 131
 132                 mbuf = (struct rte_mbuf *)((char *)cqe -
 133                                            sizeof(struct rte_mbuf));
 134                 cn10k_nix_cqe_to_mbuf(cqe, cqe->tag, mbuf, lookup_mem,
 135                                       mbuf_init, flags);
 136                 /* Extracting tstamp, if PTP enabled*/
 137                 tstamp_ptr = *(uint64_t *)(((struct nix_wqe_hdr_s *)cqe) +
 138                                            CNXK_SSO_WQE_SG_PTR);
 139                 cnxk_nix_mbuf_to_tstamp((struct rte_mbuf *)mbuf, tstamp,
 140                                         flags & NIX_RX_OFFLOAD_TSTAMP_F,
 141                                         flags & NIX_RX_MULTI_SEG_F,
 142                                         (uint64_t *)tstamp_ptr);
 143                 wqe[0] = (uint64_t *)mbuf;
 144                 non_vec--;
 145                 wqe++;
 146         }
 147 }
 148
 149 static __rte_always_inline uint16_t
 150 cn10k_sso_hws_get_work(struct cn10k_sso_hws *ws, struct rte_event *ev,
 151                        const uint32_t flags, void *lookup_mem)
 152 {
 153         union {
 154                 __uint128_t get_work;
 155                 uint64_t u64[2];
 156         } gw;
 157         uint64_t tstamp_ptr;
 158         uint64_t mbuf;
 159
 160         gw.get_work = ws->gw_wdata;
 161 #if defined(RTE_ARCH_ARM64) && !defined(__clang__)
 162         asm volatile(
 163                 PLT_CPU_FEATURE_PREAMBLE
 164                 "caspl %[wdata], %H[wdata], %[wdata], %H[wdata], [%[gw_loc]]\n"
 165                 "sub %[mbuf], %H[wdata], #0x80                          \n"
 166                 : [wdata] "+r"(gw.get_work), [mbuf] "=&r"(mbuf)
 167                 : [gw_loc] "r"(ws->base + SSOW_LF_GWS_OP_GET_WORK0)
 168                 : "memory");
 169 #else
 170         plt_write64(gw.u64[0], ws->base + SSOW_LF_GWS_OP_GET_WORK0);
 171         do {
 172                 roc_load_pair(gw.u64[0], gw.u64[1],
 173                               ws->base + SSOW_LF_GWS_WQE0);
 174         } while (gw.u64[0] & BIT_ULL(63));
 175         mbuf = (uint64_t)((char *)gw.u64[1] - sizeof(struct rte_mbuf));
 176 #endif
 177         gw.u64[0] = (gw.u64[0] & (0x3ull << 32)) << 6 |
 178                     (gw.u64[0] & (0x3FFull << 36)) << 4 |
 179                     (gw.u64[0] & 0xffffffff);
 180
 181         if (CNXK_TT_FROM_EVENT(gw.u64[0]) != SSO_TT_EMPTY) {
 182                 if (CNXK_EVENT_TYPE_FROM_TAG(gw.u64[0]) ==
 183                     RTE_EVENT_TYPE_ETHDEV) {
 184                         uint8_t port = CNXK_SUB_EVENT_FROM_TAG(gw.u64[0]);
 185
 186                         gw.u64[0] = CNXK_CLR_SUB_EVENT(gw.u64[0]);
 187                         cn10k_wqe_to_mbuf(gw.u64[1], mbuf, port,
 188                                           gw.u64[0] & 0xFFFFF, flags,
 189                                           lookup_mem);
 190                         /* Extracting tstamp, if PTP enabled*/
 191                         tstamp_ptr = *(uint64_t *)(((struct nix_wqe_hdr_s *)
 192                                                             gw.u64[1]) +
 193                                                    CNXK_SSO_WQE_SG_PTR);
 194                         cnxk_nix_mbuf_to_tstamp((struct rte_mbuf *)mbuf,
 195                                                 ws->tstamp,
 196                                                 flags & NIX_RX_OFFLOAD_TSTAMP_F,
 197                                                 flags & NIX_RX_MULTI_SEG_F,
 198                                                 (uint64_t *)tstamp_ptr);
 199                         gw.u64[1] = mbuf;
 200                 } else if (CNXK_EVENT_TYPE_FROM_TAG(gw.u64[0]) ==
 201                            RTE_EVENT_TYPE_ETHDEV_VECTOR) {
 202                         uint8_t port = CNXK_SUB_EVENT_FROM_TAG(gw.u64[0]);
 203                         __uint128_t vwqe_hdr = *(__uint128_t *)gw.u64[1];
 204
 205                         vwqe_hdr = ((vwqe_hdr >> 64) & 0xFFF) | BIT_ULL(31) |
 206                                    ((vwqe_hdr & 0xFFFF) << 48) |
 207                                    ((uint64_t)port << 32);
 208                         *(uint64_t *)gw.u64[1] = (uint64_t)vwqe_hdr;
 209                         cn10k_process_vwqe(gw.u64[1], port, flags, lookup_mem,
 210                                            ws->tstamp);
 211                 }
 212         }
 213
 214         ev->event = gw.u64[0];
 215         ev->u64 = gw.u64[1];
 216
 217         return !!gw.u64[1];
 218 }
 219
 220 /* Used in cleaning up workslot. */
 221 static __rte_always_inline uint16_t
 222 cn10k_sso_hws_get_work_empty(struct cn10k_sso_hws *ws, struct rte_event *ev)
 223 {
 224         union {
 225                 __uint128_t get_work;
 226                 uint64_t u64[2];
 227         } gw;
 228         uint64_t mbuf;
 229
 230 #ifdef RTE_ARCH_ARM64
 231         asm volatile(PLT_CPU_FEATURE_PREAMBLE
 232                      "          ldp %[tag], %[wqp], [%[tag_loc]]        \n"
 233                      "          tbz %[tag], 63, done%=                  \n"
 234                      "          sevl                                    \n"
 235                      "rty%=:    wfe                                     \n"
 236                      "          ldp %[tag], %[wqp], [%[tag_loc]]        \n"
 237                      "          tbnz %[tag], 63, rty%=                  \n"
 238                      "done%=:   dmb ld                                  \n"
 239                      "          sub %[mbuf], %[wqp], #0x80              \n"
 240                      : [tag] "=&r"(gw.u64[0]), [wqp] "=&r"(gw.u64[1]),
 241                        [mbuf] "=&r"(mbuf)
 242                      : [tag_loc] "r"(ws->base + SSOW_LF_GWS_WQE0)
 243                      : "memory");
 244 #else
 245         do {
 246                 roc_load_pair(gw.u64[0], gw.u64[1],
 247                               ws->base + SSOW_LF_GWS_WQE0);
 248         } while (gw.u64[0] & BIT_ULL(63));
 249         mbuf = (uint64_t)((char *)gw.u64[1] - sizeof(struct rte_mbuf));
 250 #endif
 251
 252         gw.u64[0] = (gw.u64[0] & (0x3ull << 32)) << 6 |
 253                     (gw.u64[0] & (0x3FFull << 36)) << 4 |
 254                     (gw.u64[0] & 0xffffffff);
 255
 256         if (CNXK_TT_FROM_EVENT(gw.u64[0]) != SSO_TT_EMPTY) {
 257                 if (CNXK_EVENT_TYPE_FROM_TAG(gw.u64[0]) ==
 258                     RTE_EVENT_TYPE_ETHDEV) {
 259                         uint8_t port = CNXK_SUB_EVENT_FROM_TAG(gw.u64[0]);
 260
 261                         gw.u64[0] = CNXK_CLR_SUB_EVENT(gw.u64[0]);
 262                         cn10k_wqe_to_mbuf(gw.u64[1], mbuf, port,
 263                                           gw.u64[0] & 0xFFFFF, 0, NULL);
 264                         gw.u64[1] = mbuf;
 265                 }
 266         }
 267
 268         ev->event = gw.u64[0];
 269         ev->u64 = gw.u64[1];
 270
 271         return !!gw.u64[1];
 272 }
 273
 274 /* CN10K Fastpath functions. */
 275 uint16_t __rte_hot cn10k_sso_hws_enq(void *port, const struct rte_event *ev);
 276 uint16_t __rte_hot cn10k_sso_hws_enq_burst(void *port,
 277                                            const struct rte_event ev[],
 278                                            uint16_t nb_events);
 279 uint16_t __rte_hot cn10k_sso_hws_enq_new_burst(void *port,
 280                                                const struct rte_event ev[],
 281                                                uint16_t nb_events);
 282 uint16_t __rte_hot cn10k_sso_hws_enq_fwd_burst(void *port,
 283                                                const struct rte_event ev[],
 284                                                uint16_t nb_events);
 285
 286 #define R(name, f5, f4, f3, f2, f1, f0, flags)                                 \
 287         uint16_t __rte_hot cn10k_sso_hws_deq_##name(                           \
 288                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 289         uint16_t __rte_hot cn10k_sso_hws_deq_burst_##name(                     \
 290                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 291                 uint64_t timeout_ticks);                                       \
 292         uint16_t __rte_hot cn10k_sso_hws_deq_tmo_##name(                       \
 293                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 294         uint16_t __rte_hot cn10k_sso_hws_deq_tmo_burst_##name(                 \
 295                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 296                 uint64_t timeout_ticks);                                       \
 297         uint16_t __rte_hot cn10k_sso_hws_deq_seg_##name(                       \
 298                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 299         uint16_t __rte_hot cn10k_sso_hws_deq_seg_burst_##name(                 \
 300                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 301                 uint64_t timeout_ticks);                                       \
 302         uint16_t __rte_hot cn10k_sso_hws_deq_tmo_seg_##name(                   \
 303                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 304         uint16_t __rte_hot cn10k_sso_hws_deq_tmo_seg_burst_##name(             \
 305                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 306                 uint64_t timeout_ticks);
 307
 308 NIX_RX_FASTPATH_MODES
 309 #undef R
 310
 311 static __rte_always_inline const struct cn10k_eth_txq *
 312 cn10k_sso_hws_xtract_meta(struct rte_mbuf *m,
 313                           const uint64_t txq_data[][RTE_MAX_QUEUES_PER_PORT])
 314 {
 315         return (const struct cn10k_eth_txq *)
 316                 txq_data[m->port][rte_event_eth_tx_adapter_txq_get(m)];
 317 }
 318
 319 static __rte_always_inline uint16_t
 320 cn10k_sso_hws_event_tx(struct cn10k_sso_hws *ws, struct rte_event *ev,
 321                        uint64_t *cmd,
 322                        const uint64_t txq_data[][RTE_MAX_QUEUES_PER_PORT],
 323                        const uint32_t flags)
 324 {
 325         const struct cn10k_eth_txq *txq;
 326         struct rte_mbuf *m = ev->mbuf;
 327         uint16_t ref_cnt = m->refcnt;
 328         uintptr_t lmt_addr;
 329         uint16_t lmt_id;
 330         uintptr_t pa;
 331
 332         lmt_addr = ws->lmt_base;
 333         ROC_LMT_BASE_ID_GET(lmt_addr, lmt_id);
 334         txq = cn10k_sso_hws_xtract_meta(m, txq_data);
 335         cn10k_nix_tx_skeleton(txq, cmd, flags);
 336         /* Perform header writes before barrier for TSO */
 337         if (flags & NIX_TX_OFFLOAD_TSO_F)
 338                 cn10k_nix_xmit_prepare_tso(m, flags);
 339
 340         cn10k_nix_xmit_prepare(m, cmd, lmt_addr, flags, txq->lso_tun_fmt);
 341         if (flags & NIX_TX_MULTI_SEG_F) {
 342                 const uint16_t segdw =
 343                         cn10k_nix_prepare_mseg(m, (uint64_t *)lmt_addr, flags);
 344                 pa = txq->io_addr | ((segdw - 1) << 4);
 345         } else {
 346                 pa = txq->io_addr | (cn10k_nix_tx_ext_subs(flags) + 1) << 4;
 347         }
 348         if (!ev->sched_type)
 349                 cnxk_sso_hws_head_wait(ws->tx_base + SSOW_LF_GWS_TAG);
 350
 351         roc_lmt_submit_steorl(lmt_id, pa);
 352
 353         if (flags & NIX_TX_OFFLOAD_MBUF_NOFF_F) {
 354                 if (ref_cnt > 1)
 355                         return 1;
 356         }
 357
 358         cnxk_sso_hws_swtag_flush(ws->tx_base + SSOW_LF_GWS_TAG,
 359                                  ws->tx_base + SSOW_LF_GWS_OP_SWTAG_FLUSH);
 360
 361         return 1;
 362 }
 363
 364 #define T(name, f5, f4, f3, f2, f1, f0, sz, flags)                             \
 365         uint16_t __rte_hot cn10k_sso_hws_tx_adptr_enq_##name(                  \
 366                 void *port, struct rte_event ev[], uint16_t nb_events);        \
 367         uint16_t __rte_hot cn10k_sso_hws_tx_adptr_enq_seg_##name(              \
 368                 void *port, struct rte_event ev[], uint16_t nb_events);        \
 369         uint16_t __rte_hot cn10k_sso_hws_dual_tx_adptr_enq_##name(             \
 370                 void *port, struct rte_event ev[], uint16_t nb_events);        \
 371         uint16_t __rte_hot cn10k_sso_hws_dual_tx_adptr_enq_seg_##name(         \
 372                 void *port, struct rte_event ev[], uint16_t nb_events);
 373
 374 NIX_TX_FASTPATH_MODES
 375 #undef T
 376
 377 #endif