1 /* 2 * BSD LICENSE 3 * 4 * Copyright (C) Cavium networks Ltd. 2017. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * * Neither the name of Cavium networks nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 34 #include <rte_common.h> 35 #include <rte_branch_prediction.h> 36 37 #include "ssovf_evdev.h" 38 39 enum { 40 SSO_SYNC_ORDERED, 41 SSO_SYNC_ATOMIC, 42 SSO_SYNC_UNTAGGED, 43 SSO_SYNC_EMPTY 44 }; 45 46 #ifndef __hot 47 #define __hot __attribute__((hot)) 48 #endif 49 50 /* SSO Operations */ 51 52 static __rte_always_inline uint16_t 53 ssows_get_work(struct ssows *ws, struct rte_event *ev) 54 { 55 uint64_t get_work0, get_work1; 56 uint64_t sched_type_queue; 57 58 ssovf_load_pair(get_work0, get_work1, ws->getwork); 59 60 sched_type_queue = (get_work0 >> 32) & 0xfff; 61 ws->cur_tt = sched_type_queue & 0x3; 62 ws->cur_grp = sched_type_queue >> 2; 63 sched_type_queue = sched_type_queue << 38; 64 65 ev->event = sched_type_queue | (get_work0 & 0xffffffff); 66 ev->u64 = get_work1; 67 return !!get_work1; 68 } 69 70 static __rte_always_inline void 71 ssows_add_work(struct ssows *ws, const uint64_t event_ptr, const uint32_t tag, 72 const uint8_t new_tt, const uint8_t grp) 73 { 74 uint64_t add_work0; 75 76 add_work0 = tag | ((uint64_t)(new_tt) << 32); 77 ssovf_store_pair(add_work0, event_ptr, ws->grps[grp]); 78 } 79 80 static __rte_always_inline void 81 ssows_swtag_full(struct ssows *ws, const uint64_t event_ptr, const uint32_t tag, 82 const uint8_t new_tt, const uint8_t grp) 83 { 84 uint64_t swtag_full0; 85 86 swtag_full0 = tag | ((uint64_t)(new_tt & 0x3) << 32) | 87 ((uint64_t)grp << 34); 88 ssovf_store_pair(swtag_full0, event_ptr, (ws->base + 89 SSOW_VHWS_OP_SWTAG_FULL0)); 90 } 91 92 static __rte_always_inline void 93 ssows_swtag_desched(struct ssows *ws, uint32_t tag, uint8_t new_tt, uint8_t grp) 94 { 95 uint64_t val; 96 97 val = tag | ((uint64_t)(new_tt & 0x3) << 32) | ((uint64_t)grp << 34); 98 ssovf_write64(val, ws->base + SSOW_VHWS_OP_SWTAG_DESCHED); 99 } 100 101 static __rte_always_inline void 102 ssows_swtag_norm(struct ssows *ws, uint32_t tag, uint8_t new_tt) 103 { 104 uint64_t val; 105 106 val = tag | ((uint64_t)(new_tt & 0x3) << 32); 107 ssovf_write64(val, ws->base + SSOW_VHWS_OP_SWTAG_NORM); 108 } 109 110 static __rte_always_inline void 111 ssows_swtag_untag(struct ssows *ws) 112 { 113 ssovf_write64(0, ws->base + SSOW_VHWS_OP_SWTAG_UNTAG); 114 ws->cur_tt = SSO_SYNC_UNTAGGED; 115 } 116 117 static __rte_always_inline void 118 ssows_upd_wqp(struct ssows *ws, uint8_t grp, uint64_t event_ptr) 119 { 120 ssovf_store_pair((uint64_t)grp << 34, event_ptr, (ws->base + 121 SSOW_VHWS_OP_UPD_WQP_GRP0)); 122 } 123 124 static __rte_always_inline void 125 ssows_desched(struct ssows *ws) 126 { 127 ssovf_write64(0, ws->base + SSOW_VHWS_OP_DESCHED); 128 } 129 130 static __rte_always_inline void 131 ssows_swtag_wait(struct ssows *ws) 132 { 133 /* Wait for the SWTAG/SWTAG_FULL operation */ 134 while (ssovf_read64(ws->base + SSOW_VHWS_SWTP)) 135 ; 136 } 137