drivers/event/octeontx/ssovf_worker.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017 Cavium, Inc
   3  */
   4
   5 #include "ssovf_worker.h"
   6
   7 static __rte_always_inline void
   8 ssows_new_event(struct ssows *ws, const struct rte_event *ev)
   9 {
  10         const uint64_t event_ptr = ev->u64;
  11         const uint32_t tag = (uint32_t)ev->event;
  12         const uint8_t new_tt = ev->sched_type;
  13         const uint8_t grp = ev->queue_id;
  14
  15         ssows_add_work(ws, event_ptr, tag, new_tt, grp);
  16 }
  17
  18 static __rte_always_inline void
  19 ssows_fwd_swtag(struct ssows *ws, const struct rte_event *ev, const uint8_t grp)
  20 {
  21         const uint8_t cur_tt = ws->cur_tt;
  22         const uint8_t new_tt = ev->sched_type;
  23         const uint32_t tag = (uint32_t)ev->event;
  24         /*
  25          * cur_tt/new_tt     SSO_SYNC_ORDERED SSO_SYNC_ATOMIC SSO_SYNC_UNTAGGED
  26          *
  27          * SSO_SYNC_ORDERED        norm           norm             untag
  28          * SSO_SYNC_ATOMIC         norm           norm             untag
  29          * SSO_SYNC_UNTAGGED       full           full             NOOP
  30          */
  31         if (unlikely(cur_tt == SSO_SYNC_UNTAGGED)) {
  32                 if (new_tt != SSO_SYNC_UNTAGGED) {
  33                         ssows_swtag_full(ws, ev->u64, tag,
  34                                 new_tt, grp);
  35                 }
  36         } else {
  37                 if (likely(new_tt != SSO_SYNC_UNTAGGED))
  38                         ssows_swtag_norm(ws, tag, new_tt);
  39                 else
  40                         ssows_swtag_untag(ws);
  41         }
  42         ws->swtag_req = 1;
  43 }
  44
  45 #define OCT_EVENT_TYPE_GRP_FWD (RTE_EVENT_TYPE_MAX - 1)
  46
  47 static __rte_always_inline void
  48 ssows_fwd_group(struct ssows *ws, const struct rte_event *ev, const uint8_t grp)
  49 {
  50         const uint64_t event_ptr = ev->u64;
  51         const uint32_t tag = (uint32_t)ev->event;
  52         const uint8_t cur_tt = ws->cur_tt;
  53         const uint8_t new_tt = ev->sched_type;
  54
  55         if (cur_tt == SSO_SYNC_ORDERED) {
  56                 /* Create unique tag based on custom event type and new grp */
  57                 uint32_t newtag = OCT_EVENT_TYPE_GRP_FWD << 28;
  58
  59                 newtag |= grp << 20;
  60                 newtag |= tag;
  61                 ssows_swtag_norm(ws, newtag, SSO_SYNC_ATOMIC);
  62                 rte_smp_wmb();
  63                 ssows_swtag_wait(ws);
  64         } else {
  65                 rte_smp_wmb();
  66         }
  67         ssows_add_work(ws, event_ptr, tag, new_tt, grp);
  68 }
  69
  70 static __rte_always_inline void
  71 ssows_forward_event(struct ssows *ws, const struct rte_event *ev)
  72 {
  73         const uint8_t grp = ev->queue_id;
  74
  75         /* Group hasn't changed, Use SWTAG to forward the event */
  76         if (ws->cur_grp == grp)
  77                 ssows_fwd_swtag(ws, ev, grp);
  78         else
  79         /*
  80          * Group has been changed for group based work pipelining,
  81          * Use deschedule/add_work operation to transfer the event to
  82          * new group/core
  83          */
  84                 ssows_fwd_group(ws, ev, grp);
  85 }
  86
  87 static __rte_always_inline void
  88 ssows_release_event(struct ssows *ws)
  89 {
  90         if (likely(ws->cur_tt != SSO_SYNC_UNTAGGED))
  91                 ssows_swtag_untag(ws);
  92 }
  93
  94 __rte_always_inline uint16_t __hot
  95 ssows_deq(void *port, struct rte_event *ev, uint64_t timeout_ticks)
  96 {
  97         struct ssows *ws = port;
  98
  99         RTE_SET_USED(timeout_ticks);
 100
 101         if (ws->swtag_req) {
 102                 ws->swtag_req = 0;
 103                 ssows_swtag_wait(ws);
 104                 return 1;
 105         } else {
 106                 return ssows_get_work(ws, ev);
 107         }
 108 }
 109
 110 __rte_always_inline uint16_t __hot
 111 ssows_deq_timeout(void *port, struct rte_event *ev, uint64_t timeout_ticks)
 112 {
 113         struct ssows *ws = port;
 114         uint64_t iter;
 115         uint16_t ret = 1;
 116
 117         if (ws->swtag_req) {
 118                 ws->swtag_req = 0;
 119                 ssows_swtag_wait(ws);
 120         } else {
 121                 ret = ssows_get_work(ws, ev);
 122                 for (iter = 1; iter < timeout_ticks && (ret == 0); iter++)
 123                         ret = ssows_get_work(ws, ev);
 124         }
 125         return ret;
 126 }
 127
 128 uint16_t __hot
 129 ssows_deq_burst(void *port, struct rte_event ev[], uint16_t nb_events,
 130                 uint64_t timeout_ticks)
 131 {
 132         RTE_SET_USED(nb_events);
 133
 134         return ssows_deq(port, ev, timeout_ticks);
 135 }
 136
 137 uint16_t __hot
 138 ssows_deq_timeout_burst(void *port, struct rte_event ev[], uint16_t nb_events,
 139                         uint64_t timeout_ticks)
 140 {
 141         RTE_SET_USED(nb_events);
 142
 143         return ssows_deq_timeout(port, ev, timeout_ticks);
 144 }
 145
 146 __rte_always_inline uint16_t __hot
 147 ssows_enq(void *port, const struct rte_event *ev)
 148 {
 149         struct ssows *ws = port;
 150         uint16_t ret = 1;
 151
 152         switch (ev->op) {
 153         case RTE_EVENT_OP_NEW:
 154                 rte_smp_wmb();
 155                 ssows_new_event(ws, ev);
 156                 break;
 157         case RTE_EVENT_OP_FORWARD:
 158                 ssows_forward_event(ws, ev);
 159                 break;
 160         case RTE_EVENT_OP_RELEASE:
 161                 ssows_release_event(ws);
 162                 break;
 163         default:
 164                 ret = 0;
 165         }
 166         return ret;
 167 }
 168
 169 uint16_t __hot
 170 ssows_enq_burst(void *port, const struct rte_event ev[], uint16_t nb_events)
 171 {
 172         RTE_SET_USED(nb_events);
 173         return ssows_enq(port, ev);
 174 }
 175
 176 uint16_t __hot
 177 ssows_enq_new_burst(void *port, const struct rte_event ev[], uint16_t nb_events)
 178 {
 179         uint16_t i;
 180         struct ssows *ws = port;
 181
 182         rte_smp_wmb();
 183         for (i = 0; i < nb_events; i++)
 184                 ssows_new_event(ws,  &ev[i]);
 185
 186         return nb_events;
 187 }
 188
 189 uint16_t __hot
 190 ssows_enq_fwd_burst(void *port, const struct rte_event ev[], uint16_t nb_events)
 191 {
 192         struct ssows *ws = port;
 193         RTE_SET_USED(nb_events);
 194
 195         ssows_forward_event(ws,  ev);
 196
 197         return 1;
 198 }
 199
 200 void
 201 ssows_flush_events(struct ssows *ws, uint8_t queue_id)
 202 {
 203         uint32_t reg_off;
 204         uint64_t aq_cnt = 1;
 205         uint64_t cq_ds_cnt = 1;
 206         uint64_t enable, get_work0, get_work1;
 207         uint8_t *base = octeontx_ssovf_bar(OCTEONTX_SSO_GROUP, queue_id, 0);
 208
 209         enable = ssovf_read64(base + SSO_VHGRP_QCTL);
 210         if (!enable)
 211                 return;
 212
 213         reg_off = SSOW_VHWS_OP_GET_WORK0;
 214         reg_off |= 1 << 17; /* Grouped */
 215         reg_off |= 1 << 16; /* WAIT */
 216         reg_off |= queue_id << 4; /* INDEX_GGRP_MASK(group number) */
 217         while (aq_cnt || cq_ds_cnt) {
 218                 aq_cnt = ssovf_read64(base + SSO_VHGRP_AQ_CNT);
 219                 cq_ds_cnt = ssovf_read64(base + SSO_VHGRP_INT_CNT);
 220                 /* Extract cq and ds count */
 221                 cq_ds_cnt &= 0x1FFF1FFF0000;
 222                 ssovf_load_pair(get_work0, get_work1, ws->base + reg_off);
 223         }
 224
 225         RTE_SET_USED(get_work0);
 226         RTE_SET_USED(get_work1);
 227 }
 228
 229 void
 230 ssows_reset(struct ssows *ws)
 231 {
 232         uint64_t tag;
 233         uint64_t pend_tag;
 234         uint8_t pend_tt;
 235         uint8_t tt;
 236
 237         tag = ssovf_read64(ws->base + SSOW_VHWS_TAG);
 238         pend_tag = ssovf_read64(ws->base + SSOW_VHWS_PENDTAG);
 239
 240         if (pend_tag & (1ULL << 63)) { /* Tagswitch pending */
 241                 pend_tt = (pend_tag >> 32) & 0x3;
 242                 if (pend_tt == SSO_SYNC_ORDERED || pend_tt == SSO_SYNC_ATOMIC)
 243                         ssows_desched(ws);
 244         } else {
 245                 tt = (tag >> 32) & 0x3;
 246                 if (tt == SSO_SYNC_ORDERED || tt == SSO_SYNC_ATOMIC)
 247                         ssows_swtag_untag(ws);
 248         }
 249 }