text: /* SPDX-License-Identifier: BSD-3-Clause
   * Copyright(c) 2017 Cavium, Inc
   */
  
  #include <rte_common.h>
  #include <rte_branch_prediction.h>
  
  #include <octeontx_mbox.h>
  
  #include "ssovf_evdev.h"
  #include "octeontx_rxtx.h"
  
  enum {
  	SSO_SYNC_ORDERED,
  	SSO_SYNC_ATOMIC,
  	SSO_SYNC_UNTAGGED,
  	SSO_SYNC_EMPTY
  };
  
  #ifndef __hot
  #define __hot	__attribute__((hot))
  #endif
  
  /* SSO Operations */
  
  static __rte_always_inline struct rte_mbuf *
  ssovf_octeontx_wqe_to_pkt(uint64_t work, uint16_t port_info)
  {
  	struct rte_mbuf *mbuf;
  	octtx_wqe_t *wqe = (octtx_wqe_t *)(uintptr_t)work;
  
  	/* Get mbuf from wqe */
  	mbuf = (struct rte_mbuf *)((uintptr_t)wqe -
  			OCTTX_PACKET_WQE_SKIP);
  	rte_prefetch_non_temporal(mbuf);
  	mbuf->packet_type =
  		ptype_table[wqe->s.w2.lcty][wqe->s.w2.lety][wqe->s.w2.lfty];
  	mbuf->data_off = RTE_PTR_DIFF(wqe->s.w3.addr, mbuf->buf_addr);
  	mbuf->pkt_len = wqe->s.w1.len;
  	mbuf->data_len = mbuf->pkt_len;
  	mbuf->nb_segs = 1;
  	mbuf->ol_flags = 0;
  	mbuf->port = rte_octeontx_pchan_map[port_info >> 4][port_info & 0xF];
  	rte_mbuf_refcnt_set(mbuf, 1);
  
  	return mbuf;
  }
  
  static __rte_always_inline uint16_t
  ssows_get_work(struct ssows *ws, struct rte_event *ev)
  {
  	uint64_t get_work0, get_work1;
  	uint64_t sched_type_queue;
  
  	ssovf_load_pair(get_work0, get_work1, ws->getwork);
  
  	sched_type_queue = (get_work0 >> 32) & 0xfff;
  	ws->cur_tt = sched_type_queue & 0x3;
  	ws->cur_grp = sched_type_queue >> 2;
  	sched_type_queue = sched_type_queue << 38;
  	ev->event = sched_type_queue | (get_work0 & 0xffffffff);
  	if (get_work1 && ev->event_type == RTE_EVENT_TYPE_ETHDEV) {
  		ev->mbuf = ssovf_octeontx_wqe_to_pkt(get_work1,
  				(ev->event >> 20) & 0x7F);
  	} else {
  		ev->u64 = get_work1;
  	}
  
  	return !!get_work1;
  }
  
  static __rte_always_inline void
  ssows_add_work(struct ssows *ws, const uint64_t event_ptr, const uint32_t tag,
  			const uint8_t new_tt, const uint8_t grp)
  {
  	uint64_t add_work0;
  
  	add_work0 = tag | ((uint64_t)(new_tt) << 32);
  	ssovf_store_pair(add_work0, event_ptr, ws->grps[grp]);
  }
  
  static __rte_always_inline void
  ssows_swtag_full(struct ssows *ws, const uint64_t event_ptr, const uint32_t tag,
  			const uint8_t new_tt, const uint8_t grp)
  {
  	uint64_t swtag_full0;
  
  	swtag_full0 = tag | ((uint64_t)(new_tt & 0x3) << 32) |
  				((uint64_t)grp << 34);
  	ssovf_store_pair(swtag_full0, event_ptr, (ws->base +
  				SSOW_VHWS_OP_SWTAG_FULL0));
  }
  
  static __rte_always_inline void
  ssows_swtag_desched(struct ssows *ws, uint32_t tag, uint8_t new_tt, uint8_t grp)
  {
  	uint64_t val;
  
  	val = tag | ((uint64_t)(new_tt & 0x3) << 32) | ((uint64_t)grp << 34);
  	ssovf_write64(val, ws->base + SSOW_VHWS_OP_SWTAG_DESCHED);
  }
  
  static __rte_always_inline void
  ssows_swtag_norm(struct ssows *ws, uint32_t tag, uint8_t new_tt)
  {
  	uint64_t val;
  
  	val = tag | ((uint64_t)(new_tt & 0x3) << 32);
  	ssovf_write64(val, ws->base + SSOW_VHWS_OP_SWTAG_NORM);
  }
  
  static __rte_always_inline void
  ssows_swtag_untag(struct ssows *ws)
  {
  	ssovf_write64(0, ws->base + SSOW_VHWS_OP_SWTAG_UNTAG);
  	ws->cur_tt = SSO_SYNC_UNTAGGED;
  }
  
  static __rte_always_inline void
  ssows_upd_wqp(struct ssows *ws, uint8_t grp, uint64_t event_ptr)
  {
  	ssovf_store_pair((uint64_t)grp << 34, event_ptr, (ws->base +
  				SSOW_VHWS_OP_UPD_WQP_GRP0));
  }
  
  static __rte_always_inline void
  ssows_desched(struct ssows *ws)
  {
  	ssovf_write64(0, ws->base + SSOW_VHWS_OP_DESCHED);
  }
  
  static __rte_always_inline void
  ssows_swtag_wait(struct ssows *ws)
  {
  	/* Wait for the SWTAG/SWTAG_FULL operation */
  	while (ssovf_read64(ws->base + SSOW_VHWS_SWTP))
  	;
  }
  