drivers/event/cnxk/cn9k_worker.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(C) 2021 Marvell.
   3  */
   4
   5 #ifndef __CN9K_WORKER_H__
   6 #define __CN9K_WORKER_H__
   7
   8 #include "cnxk_ethdev.h"
   9 #include "cnxk_eventdev.h"
  10 #include "cnxk_worker.h"
  11
  12 #include "cn9k_ethdev.h"
  13 #include "cn9k_rx.h"
  14
  15 /* SSO Operations */
  16
  17 static __rte_always_inline uint8_t
  18 cn9k_sso_hws_new_event(struct cn9k_sso_hws *ws, const struct rte_event *ev)
  19 {
  20         const uint32_t tag = (uint32_t)ev->event;
  21         const uint8_t new_tt = ev->sched_type;
  22         const uint64_t event_ptr = ev->u64;
  23         const uint16_t grp = ev->queue_id;
  24
  25         rte_atomic_thread_fence(__ATOMIC_ACQ_REL);
  26         if (ws->xaq_lmt <= *ws->fc_mem)
  27                 return 0;
  28
  29         cnxk_sso_hws_add_work(event_ptr, tag, new_tt, ws->grps_base[grp]);
  30         return 1;
  31 }
  32
  33 static __rte_always_inline void
  34 cn9k_sso_hws_fwd_swtag(struct cn9k_sso_hws_state *vws,
  35                        const struct rte_event *ev)
  36 {
  37         const uint32_t tag = (uint32_t)ev->event;
  38         const uint8_t new_tt = ev->sched_type;
  39         const uint8_t cur_tt = CNXK_TT_FROM_TAG(plt_read64(vws->tag_op));
  40
  41         /* CNXK model
  42          * cur_tt/new_tt     SSO_TT_ORDERED SSO_TT_ATOMIC SSO_TT_UNTAGGED
  43          *
  44          * SSO_TT_ORDERED        norm           norm             untag
  45          * SSO_TT_ATOMIC         norm           norm               untag
  46          * SSO_TT_UNTAGGED       norm           norm             NOOP
  47          */
  48
  49         if (new_tt == SSO_TT_UNTAGGED) {
  50                 if (cur_tt != SSO_TT_UNTAGGED)
  51                         cnxk_sso_hws_swtag_untag(
  52                                 CN9K_SSOW_GET_BASE_ADDR(vws->getwrk_op) +
  53                                 SSOW_LF_GWS_OP_SWTAG_UNTAG);
  54         } else {
  55                 cnxk_sso_hws_swtag_norm(tag, new_tt, vws->swtag_norm_op);
  56         }
  57 }
  58
  59 static __rte_always_inline void
  60 cn9k_sso_hws_fwd_group(struct cn9k_sso_hws_state *ws,
  61                        const struct rte_event *ev, const uint16_t grp)
  62 {
  63         const uint32_t tag = (uint32_t)ev->event;
  64         const uint8_t new_tt = ev->sched_type;
  65
  66         plt_write64(ev->u64, CN9K_SSOW_GET_BASE_ADDR(ws->getwrk_op) +
  67                                      SSOW_LF_GWS_OP_UPD_WQP_GRP1);
  68         cnxk_sso_hws_swtag_desched(tag, new_tt, grp, ws->swtag_desched_op);
  69 }
  70
  71 static __rte_always_inline void
  72 cn9k_sso_hws_forward_event(struct cn9k_sso_hws *ws, const struct rte_event *ev)
  73 {
  74         const uint8_t grp = ev->queue_id;
  75
  76         /* Group hasn't changed, Use SWTAG to forward the event */
  77         if (CNXK_GRP_FROM_TAG(plt_read64(ws->tag_op)) == grp) {
  78                 cn9k_sso_hws_fwd_swtag((struct cn9k_sso_hws_state *)ws, ev);
  79                 ws->swtag_req = 1;
  80         } else {
  81                 /*
  82                  * Group has been changed for group based work pipelining,
  83                  * Use deschedule/add_work operation to transfer the event to
  84                  * new group/core
  85                  */
  86                 cn9k_sso_hws_fwd_group((struct cn9k_sso_hws_state *)ws, ev,
  87                                        grp);
  88         }
  89 }
  90
  91 /* Dual ws ops. */
  92
  93 static __rte_always_inline uint8_t
  94 cn9k_sso_hws_dual_new_event(struct cn9k_sso_hws_dual *dws,
  95                             const struct rte_event *ev)
  96 {
  97         const uint32_t tag = (uint32_t)ev->event;
  98         const uint8_t new_tt = ev->sched_type;
  99         const uint64_t event_ptr = ev->u64;
 100         const uint16_t grp = ev->queue_id;
 101
 102         rte_atomic_thread_fence(__ATOMIC_ACQ_REL);
 103         if (dws->xaq_lmt <= *dws->fc_mem)
 104                 return 0;
 105
 106         cnxk_sso_hws_add_work(event_ptr, tag, new_tt, dws->grps_base[grp]);
 107         return 1;
 108 }
 109
 110 static __rte_always_inline void
 111 cn9k_sso_hws_dual_forward_event(struct cn9k_sso_hws_dual *dws,
 112                                 struct cn9k_sso_hws_state *vws,
 113                                 const struct rte_event *ev)
 114 {
 115         const uint8_t grp = ev->queue_id;
 116
 117         /* Group hasn't changed, Use SWTAG to forward the event */
 118         if (CNXK_GRP_FROM_TAG(plt_read64(vws->tag_op)) == grp) {
 119                 cn9k_sso_hws_fwd_swtag(vws, ev);
 120                 dws->swtag_req = 1;
 121         } else {
 122                 /*
 123                  * Group has been changed for group based work pipelining,
 124                  * Use deschedule/add_work operation to transfer the event to
 125                  * new group/core
 126                  */
 127                 cn9k_sso_hws_fwd_group(vws, ev, grp);
 128         }
 129 }
 130
 131 static __rte_always_inline void
 132 cn9k_wqe_to_mbuf(uint64_t wqe, const uint64_t mbuf, uint8_t port_id,
 133                  const uint32_t tag, const uint32_t flags,
 134                  const void *const lookup_mem)
 135 {
 136         const uint64_t mbuf_init = 0x100010000ULL | RTE_PKTMBUF_HEADROOM |
 137                                    (flags & NIX_RX_OFFLOAD_TSTAMP_F ? 8 : 0);
 138
 139         cn9k_nix_cqe_to_mbuf((struct nix_cqe_hdr_s *)wqe, tag,
 140                              (struct rte_mbuf *)mbuf, lookup_mem,
 141                              mbuf_init | ((uint64_t)port_id) << 48, flags);
 142 }
 143
 144 static __rte_always_inline uint16_t
 145 cn9k_sso_hws_dual_get_work(struct cn9k_sso_hws_state *ws,
 146                            struct cn9k_sso_hws_state *ws_pair,
 147                            struct rte_event *ev, const uint32_t flags,
 148                            const void *const lookup_mem,
 149                            struct cnxk_timesync_info *const tstamp)
 150 {
 151         const uint64_t set_gw = BIT_ULL(16) | 1;
 152         union {
 153                 __uint128_t get_work;
 154                 uint64_t u64[2];
 155         } gw;
 156         uint64_t tstamp_ptr;
 157         uint64_t mbuf;
 158
 159         if (flags & NIX_RX_OFFLOAD_PTYPE_F)
 160                 rte_prefetch_non_temporal(lookup_mem);
 161 #ifdef RTE_ARCH_ARM64
 162         asm volatile(PLT_CPU_FEATURE_PREAMBLE
 163                      "rty%=:                                    \n"
 164                      "          ldr %[tag], [%[tag_loc]]        \n"
 165                      "          ldr %[wqp], [%[wqp_loc]]        \n"
 166                      "          tbnz %[tag], 63, rty%=          \n"
 167                      "done%=:   str %[gw], [%[pong]]            \n"
 168                      "          dmb ld                          \n"
 169                      "          sub %[mbuf], %[wqp], #0x80      \n"
 170                      "          prfm pldl1keep, [%[mbuf]]       \n"
 171                      : [tag] "=&r"(gw.u64[0]), [wqp] "=&r"(gw.u64[1]),
 172                        [mbuf] "=&r"(mbuf)
 173                      : [tag_loc] "r"(ws->tag_op), [wqp_loc] "r"(ws->wqp_op),
 174                        [gw] "r"(set_gw), [pong] "r"(ws_pair->getwrk_op));
 175 #else
 176         gw.u64[0] = plt_read64(ws->tag_op);
 177         while ((BIT_ULL(63)) & gw.u64[0])
 178                 gw.u64[0] = plt_read64(ws->tag_op);
 179         gw.u64[1] = plt_read64(ws->wqp_op);
 180         plt_write64(set_gw, ws_pair->getwrk_op);
 181         mbuf = (uint64_t)((char *)gw.u64[1] - sizeof(struct rte_mbuf));
 182 #endif
 183
 184         gw.u64[0] = (gw.u64[0] & (0x3ull << 32)) << 6 |
 185                     (gw.u64[0] & (0x3FFull << 36)) << 4 |
 186                     (gw.u64[0] & 0xffffffff);
 187
 188         if (CNXK_TT_FROM_EVENT(gw.u64[0]) != SSO_TT_EMPTY) {
 189                 if (CNXK_EVENT_TYPE_FROM_TAG(gw.u64[0]) ==
 190                     RTE_EVENT_TYPE_ETHDEV) {
 191                         uint8_t port = CNXK_SUB_EVENT_FROM_TAG(gw.u64[0]);
 192
 193                         gw.u64[0] = CNXK_CLR_SUB_EVENT(gw.u64[0]);
 194                         cn9k_wqe_to_mbuf(gw.u64[1], mbuf, port,
 195                                          gw.u64[0] & 0xFFFFF, flags,
 196                                          lookup_mem);
 197                         /* Extracting tstamp, if PTP enabled*/
 198                         tstamp_ptr = *(uint64_t *)(((struct nix_wqe_hdr_s *)
 199                                                             gw.u64[1]) +
 200                                                    CNXK_SSO_WQE_SG_PTR);
 201                         cnxk_nix_mbuf_to_tstamp((struct rte_mbuf *)mbuf, tstamp,
 202                                                 flags & NIX_RX_OFFLOAD_TSTAMP_F,
 203                                                 flags & NIX_RX_MULTI_SEG_F,
 204                                                 (uint64_t *)tstamp_ptr);
 205                         gw.u64[1] = mbuf;
 206                 }
 207         }
 208
 209         ev->event = gw.u64[0];
 210         ev->u64 = gw.u64[1];
 211
 212         return !!gw.u64[1];
 213 }
 214
 215 static __rte_always_inline uint16_t
 216 cn9k_sso_hws_get_work(struct cn9k_sso_hws *ws, struct rte_event *ev,
 217                       const uint32_t flags, const void *const lookup_mem)
 218 {
 219         union {
 220                 __uint128_t get_work;
 221                 uint64_t u64[2];
 222         } gw;
 223         uint64_t tstamp_ptr;
 224         uint64_t mbuf;
 225
 226         plt_write64(BIT_ULL(16) | /* wait for work. */
 227                             1,    /* Use Mask set 0. */
 228                     ws->getwrk_op);
 229
 230         if (flags & NIX_RX_OFFLOAD_PTYPE_F)
 231                 rte_prefetch_non_temporal(lookup_mem);
 232 #ifdef RTE_ARCH_ARM64
 233         asm volatile(PLT_CPU_FEATURE_PREAMBLE
 234                      "          ldr %[tag], [%[tag_loc]]        \n"
 235                      "          ldr %[wqp], [%[wqp_loc]]        \n"
 236                      "          tbz %[tag], 63, done%=          \n"
 237                      "          sevl                            \n"
 238                      "rty%=:    wfe                             \n"
 239                      "          ldr %[tag], [%[tag_loc]]        \n"
 240                      "          ldr %[wqp], [%[wqp_loc]]        \n"
 241                      "          tbnz %[tag], 63, rty%=          \n"
 242                      "done%=:   dmb ld                          \n"
 243                      "          sub %[mbuf], %[wqp], #0x80      \n"
 244                      "          prfm pldl1keep, [%[mbuf]]       \n"
 245                      : [tag] "=&r"(gw.u64[0]), [wqp] "=&r"(gw.u64[1]),
 246                        [mbuf] "=&r"(mbuf)
 247                      : [tag_loc] "r"(ws->tag_op), [wqp_loc] "r"(ws->wqp_op));
 248 #else
 249         gw.u64[0] = plt_read64(ws->tag_op);
 250         while ((BIT_ULL(63)) & gw.u64[0])
 251                 gw.u64[0] = plt_read64(ws->tag_op);
 252
 253         gw.u64[1] = plt_read64(ws->wqp_op);
 254         mbuf = (uint64_t)((char *)gw.u64[1] - sizeof(struct rte_mbuf));
 255 #endif
 256
 257         gw.u64[0] = (gw.u64[0] & (0x3ull << 32)) << 6 |
 258                     (gw.u64[0] & (0x3FFull << 36)) << 4 |
 259                     (gw.u64[0] & 0xffffffff);
 260
 261         if (CNXK_TT_FROM_EVENT(gw.u64[0]) != SSO_TT_EMPTY) {
 262                 if (CNXK_EVENT_TYPE_FROM_TAG(gw.u64[0]) ==
 263                     RTE_EVENT_TYPE_ETHDEV) {
 264                         uint8_t port = CNXK_SUB_EVENT_FROM_TAG(gw.u64[0]);
 265
 266                         gw.u64[0] = CNXK_CLR_SUB_EVENT(gw.u64[0]);
 267                         cn9k_wqe_to_mbuf(gw.u64[1], mbuf, port,
 268                                          gw.u64[0] & 0xFFFFF, flags,
 269                                          lookup_mem);
 270                         /* Extracting tstamp, if PTP enabled*/
 271                         tstamp_ptr = *(uint64_t *)(((struct nix_wqe_hdr_s *)
 272                                                             gw.u64[1]) +
 273                                                    CNXK_SSO_WQE_SG_PTR);
 274                         cnxk_nix_mbuf_to_tstamp((struct rte_mbuf *)mbuf,
 275                                                 ws->tstamp,
 276                                                 flags & NIX_RX_OFFLOAD_TSTAMP_F,
 277                                                 flags & NIX_RX_MULTI_SEG_F,
 278                                                 (uint64_t *)tstamp_ptr);
 279                         gw.u64[1] = mbuf;
 280                 }
 281         }
 282
 283         ev->event = gw.u64[0];
 284         ev->u64 = gw.u64[1];
 285
 286         return !!gw.u64[1];
 287 }
 288
 289 /* Used in cleaning up workslot. */
 290 static __rte_always_inline uint16_t
 291 cn9k_sso_hws_get_work_empty(struct cn9k_sso_hws_state *ws, struct rte_event *ev)
 292 {
 293         union {
 294                 __uint128_t get_work;
 295                 uint64_t u64[2];
 296         } gw;
 297         uint64_t mbuf;
 298
 299 #ifdef RTE_ARCH_ARM64
 300         asm volatile(PLT_CPU_FEATURE_PREAMBLE
 301                      "          ldr %[tag], [%[tag_loc]]        \n"
 302                      "          ldr %[wqp], [%[wqp_loc]]        \n"
 303                      "          tbz %[tag], 63, done%=          \n"
 304                      "          sevl                            \n"
 305                      "rty%=:    wfe                             \n"
 306                      "          ldr %[tag], [%[tag_loc]]        \n"
 307                      "          ldr %[wqp], [%[wqp_loc]]        \n"
 308                      "          tbnz %[tag], 63, rty%=          \n"
 309                      "done%=:   dmb ld                          \n"
 310                      "          sub %[mbuf], %[wqp], #0x80      \n"
 311                      : [tag] "=&r"(gw.u64[0]), [wqp] "=&r"(gw.u64[1]),
 312                        [mbuf] "=&r"(mbuf)
 313                      : [tag_loc] "r"(ws->tag_op), [wqp_loc] "r"(ws->wqp_op));
 314 #else
 315         gw.u64[0] = plt_read64(ws->tag_op);
 316         while ((BIT_ULL(63)) & gw.u64[0])
 317                 gw.u64[0] = plt_read64(ws->tag_op);
 318
 319         gw.u64[1] = plt_read64(ws->wqp_op);
 320         mbuf = (uint64_t)((char *)gw.u64[1] - sizeof(struct rte_mbuf));
 321 #endif
 322
 323         gw.u64[0] = (gw.u64[0] & (0x3ull << 32)) << 6 |
 324                     (gw.u64[0] & (0x3FFull << 36)) << 4 |
 325                     (gw.u64[0] & 0xffffffff);
 326
 327         if (CNXK_TT_FROM_EVENT(gw.u64[0]) != SSO_TT_EMPTY) {
 328                 if (CNXK_EVENT_TYPE_FROM_TAG(gw.u64[0]) ==
 329                     RTE_EVENT_TYPE_ETHDEV) {
 330                         uint8_t port = CNXK_SUB_EVENT_FROM_TAG(gw.u64[0]);
 331
 332                         gw.u64[0] = CNXK_CLR_SUB_EVENT(gw.u64[0]);
 333                         cn9k_wqe_to_mbuf(gw.u64[1], mbuf, port,
 334                                          gw.u64[0] & 0xFFFFF, 0, NULL);
 335                         gw.u64[1] = mbuf;
 336                 }
 337         }
 338
 339         ev->event = gw.u64[0];
 340         ev->u64 = gw.u64[1];
 341
 342         return !!gw.u64[1];
 343 }
 344
 345 /* CN9K Fastpath functions. */
 346 uint16_t __rte_hot cn9k_sso_hws_enq(void *port, const struct rte_event *ev);
 347 uint16_t __rte_hot cn9k_sso_hws_enq_burst(void *port,
 348                                           const struct rte_event ev[],
 349                                           uint16_t nb_events);
 350 uint16_t __rte_hot cn9k_sso_hws_enq_new_burst(void *port,
 351                                               const struct rte_event ev[],
 352                                               uint16_t nb_events);
 353 uint16_t __rte_hot cn9k_sso_hws_enq_fwd_burst(void *port,
 354                                               const struct rte_event ev[],
 355                                               uint16_t nb_events);
 356
 357 uint16_t __rte_hot cn9k_sso_hws_dual_enq(void *port,
 358                                          const struct rte_event *ev);
 359 uint16_t __rte_hot cn9k_sso_hws_dual_enq_burst(void *port,
 360                                                const struct rte_event ev[],
 361                                                uint16_t nb_events);
 362 uint16_t __rte_hot cn9k_sso_hws_dual_enq_new_burst(void *port,
 363                                                    const struct rte_event ev[],
 364                                                    uint16_t nb_events);
 365 uint16_t __rte_hot cn9k_sso_hws_dual_enq_fwd_burst(void *port,
 366                                                    const struct rte_event ev[],
 367                                                    uint16_t nb_events);
 368
 369 #define R(name, f5, f4, f3, f2, f1, f0, flags)                                 \
 370         uint16_t __rte_hot cn9k_sso_hws_deq_##name(                            \
 371                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 372         uint16_t __rte_hot cn9k_sso_hws_deq_burst_##name(                      \
 373                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 374                 uint64_t timeout_ticks);                                       \
 375         uint16_t __rte_hot cn9k_sso_hws_deq_tmo_##name(                        \
 376                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 377         uint16_t __rte_hot cn9k_sso_hws_deq_tmo_burst_##name(                  \
 378                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 379                 uint64_t timeout_ticks);                                       \
 380         uint16_t __rte_hot cn9k_sso_hws_deq_seg_##name(                        \
 381                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 382         uint16_t __rte_hot cn9k_sso_hws_deq_seg_burst_##name(                  \
 383                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 384                 uint64_t timeout_ticks);                                       \
 385         uint16_t __rte_hot cn9k_sso_hws_deq_tmo_seg_##name(                    \
 386                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 387         uint16_t __rte_hot cn9k_sso_hws_deq_tmo_seg_burst_##name(              \
 388                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 389                 uint64_t timeout_ticks);
 390
 391 NIX_RX_FASTPATH_MODES
 392 #undef R
 393
 394 #define R(name, f5, f4, f3, f2, f1, f0, flags)                                 \
 395         uint16_t __rte_hot cn9k_sso_hws_dual_deq_##name(                       \
 396                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 397         uint16_t __rte_hot cn9k_sso_hws_dual_deq_burst_##name(                 \
 398                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 399                 uint64_t timeout_ticks);                                       \
 400         uint16_t __rte_hot cn9k_sso_hws_dual_deq_tmo_##name(                   \
 401                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 402         uint16_t __rte_hot cn9k_sso_hws_dual_deq_tmo_burst_##name(             \
 403                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 404                 uint64_t timeout_ticks);                                       \
 405         uint16_t __rte_hot cn9k_sso_hws_dual_deq_seg_##name(                   \
 406                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 407         uint16_t __rte_hot cn9k_sso_hws_dual_deq_seg_burst_##name(             \
 408                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 409                 uint64_t timeout_ticks);                                       \
 410         uint16_t __rte_hot cn9k_sso_hws_dual_deq_tmo_seg_##name(               \
 411                 void *port, struct rte_event *ev, uint64_t timeout_ticks);     \
 412         uint16_t __rte_hot cn9k_sso_hws_dual_deq_tmo_seg_burst_##name(         \
 413                 void *port, struct rte_event ev[], uint16_t nb_events,         \
 414                 uint64_t timeout_ticks);
 415
 416 NIX_RX_FASTPATH_MODES
 417 #undef R
 418
 419 #endif