Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | |
| 16 | #include <svm/message_queue.h> |
| 17 | #include <vppinfra/mem.h> |
Nathan Skrzypczak | cfdb109 | 2019-12-02 16:44:42 +0100 | [diff] [blame] | 18 | #include <vppinfra/format.h> |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 19 | #include <vppinfra/time.h> |
Florin Coras | 9936831 | 2018-08-02 10:45:44 -0700 | [diff] [blame] | 20 | #include <sys/eventfd.h> |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 21 | #include <sys/socket.h> |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 22 | |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 23 | static inline svm_msg_q_ring_t * |
| 24 | svm_msg_q_ring_inline (svm_msg_q_t * mq, u32 ring_index) |
| 25 | { |
| 26 | return vec_elt_at_index (mq->rings, ring_index); |
| 27 | } |
| 28 | |
| 29 | svm_msg_q_ring_t * |
| 30 | svm_msg_q_ring (svm_msg_q_t * mq, u32 ring_index) |
| 31 | { |
| 32 | return svm_msg_q_ring_inline (mq, ring_index); |
| 33 | } |
| 34 | |
| 35 | static inline void * |
| 36 | svm_msg_q_ring_data (svm_msg_q_ring_t * ring, u32 elt_index) |
| 37 | { |
| 38 | ASSERT (elt_index < ring->nitems); |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 39 | return (ring->shr->data + elt_index * ring->elsize); |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 40 | } |
| 41 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 42 | static void |
| 43 | svm_msg_q_init_mutex (svm_msg_q_shared_queue_t *sq) |
| 44 | { |
| 45 | pthread_mutexattr_t attr; |
| 46 | pthread_condattr_t cattr; |
| 47 | |
| 48 | clib_memset (&attr, 0, sizeof (attr)); |
| 49 | clib_memset (&cattr, 0, sizeof (cattr)); |
| 50 | |
| 51 | if (pthread_mutexattr_init (&attr)) |
| 52 | clib_unix_warning ("mutexattr_init"); |
| 53 | if (pthread_mutexattr_setpshared (&attr, PTHREAD_PROCESS_SHARED)) |
| 54 | clib_unix_warning ("pthread_mutexattr_setpshared"); |
| 55 | if (pthread_mutexattr_setrobust (&attr, PTHREAD_MUTEX_ROBUST)) |
| 56 | clib_unix_warning ("setrobust"); |
| 57 | if (pthread_mutex_init (&sq->mutex, &attr)) |
| 58 | clib_unix_warning ("mutex_init"); |
| 59 | if (pthread_mutexattr_destroy (&attr)) |
| 60 | clib_unix_warning ("mutexattr_destroy"); |
| 61 | if (pthread_condattr_init (&cattr)) |
| 62 | clib_unix_warning ("condattr_init"); |
| 63 | if (pthread_condattr_setpshared (&cattr, PTHREAD_PROCESS_SHARED)) |
| 64 | clib_unix_warning ("condattr_setpshared"); |
| 65 | if (pthread_cond_init (&sq->condvar, &cattr)) |
| 66 | clib_unix_warning ("cond_init1"); |
| 67 | if (pthread_condattr_destroy (&cattr)) |
| 68 | clib_unix_warning ("cond_init2"); |
| 69 | } |
| 70 | |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 71 | svm_msg_q_shared_t * |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 72 | svm_msg_q_init (void *base, svm_msg_q_cfg_t *cfg) |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 73 | { |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 74 | svm_msg_q_ring_shared_t *ring; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 75 | svm_msg_q_shared_queue_t *sq; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 76 | svm_msg_q_shared_t *smq; |
| 77 | u32 q_sz, offset; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 78 | int i; |
| 79 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 80 | q_sz = sizeof (*sq) + cfg->q_nitems * sizeof (svm_msg_q_msg_t); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 81 | |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 82 | smq = (svm_msg_q_shared_t *) base; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 83 | sq = smq->q; |
| 84 | clib_memset (sq, 0, sizeof (*sq)); |
| 85 | sq->elsize = sizeof (svm_msg_q_msg_t); |
| 86 | sq->maxsize = cfg->q_nitems; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 87 | smq->n_rings = cfg->n_rings; |
| 88 | ring = (void *) ((u8 *) smq->q + q_sz); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 89 | for (i = 0; i < cfg->n_rings; i++) |
| 90 | { |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 91 | ring->elsize = cfg->ring_cfgs[i].elsize; |
| 92 | ring->nitems = cfg->ring_cfgs[i].nitems; |
Florin Coras | 54693d2 | 2018-07-17 10:46:29 -0700 | [diff] [blame] | 93 | ring->cursize = ring->head = ring->tail = 0; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 94 | offset = sizeof (*ring) + ring->nitems * ring->elsize; |
| 95 | ring = (void *) ((u8 *) ring + offset); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 96 | } |
| 97 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 98 | svm_msg_q_init_mutex (sq); |
| 99 | |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 100 | return smq; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 101 | } |
| 102 | |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 103 | uword |
| 104 | svm_msg_q_size_to_alloc (svm_msg_q_cfg_t *cfg) |
| 105 | { |
| 106 | svm_msg_q_ring_cfg_t *ring_cfg; |
| 107 | uword rings_sz = 0, mq_sz; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 108 | u32 q_sz; |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 109 | int i; |
| 110 | |
| 111 | ASSERT (cfg); |
| 112 | |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 113 | rings_sz = sizeof (svm_msg_q_ring_shared_t) * cfg->n_rings; |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 114 | for (i = 0; i < cfg->n_rings; i++) |
| 115 | { |
| 116 | if (cfg->ring_cfgs[i].data) |
| 117 | continue; |
| 118 | ring_cfg = &cfg->ring_cfgs[i]; |
| 119 | rings_sz += (uword) ring_cfg->nitems * ring_cfg->elsize; |
| 120 | } |
| 121 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 122 | q_sz = sizeof (svm_msg_q_shared_queue_t) + |
| 123 | cfg->q_nitems * sizeof (svm_msg_q_msg_t); |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 124 | mq_sz = sizeof (svm_msg_q_shared_t) + q_sz + rings_sz; |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 125 | |
| 126 | return mq_sz; |
| 127 | } |
| 128 | |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 129 | svm_msg_q_shared_t * |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 130 | svm_msg_q_alloc (svm_msg_q_cfg_t *cfg) |
| 131 | { |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 132 | uword mq_sz; |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 133 | u8 *base; |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 134 | |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 135 | mq_sz = svm_msg_q_size_to_alloc (cfg); |
Florin Coras | 213b1bb | 2020-12-07 14:33:58 -0800 | [diff] [blame] | 136 | base = clib_mem_alloc_aligned (mq_sz, CLIB_CACHE_LINE_BYTES); |
| 137 | if (!base) |
| 138 | return 0; |
| 139 | |
| 140 | return svm_msg_q_init (base, cfg); |
| 141 | } |
| 142 | |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 143 | void |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 144 | svm_msg_q_attach (svm_msg_q_t *mq, void *smq_base) |
| 145 | { |
| 146 | svm_msg_q_ring_shared_t *ring; |
| 147 | svm_msg_q_shared_t *smq; |
| 148 | u32 i, n_rings, q_sz, offset; |
| 149 | |
| 150 | smq = (svm_msg_q_shared_t *) smq_base; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 151 | mq->q.shr = smq->q; |
| 152 | mq->q.evtfd = -1; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 153 | n_rings = smq->n_rings; |
| 154 | vec_validate (mq->rings, n_rings - 1); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 155 | q_sz = sizeof (svm_msg_q_shared_queue_t) + |
| 156 | mq->q.shr->maxsize * sizeof (svm_msg_q_msg_t); |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 157 | ring = (void *) ((u8 *) smq->q + q_sz); |
| 158 | for (i = 0; i < n_rings; i++) |
| 159 | { |
| 160 | mq->rings[i].nitems = ring->nitems; |
| 161 | mq->rings[i].elsize = ring->elsize; |
| 162 | mq->rings[i].shr = ring; |
| 163 | offset = sizeof (*ring) + ring->nitems * ring->elsize; |
| 164 | ring = (void *) ((u8 *) ring + offset); |
| 165 | } |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 166 | clib_spinlock_init (&mq->q.lock); |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | void |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 170 | svm_msg_q_free (svm_msg_q_t * mq) |
| 171 | { |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 172 | clib_mem_free (mq->q.shr); |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 173 | clib_spinlock_free (&mq->q.lock); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 174 | clib_mem_free (mq); |
| 175 | } |
| 176 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 177 | static void |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 178 | svm_msg_q_send_signal (svm_msg_q_t *mq, u8 is_consumer) |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 179 | { |
| 180 | if (mq->q.evtfd == -1) |
| 181 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 182 | if (is_consumer) |
| 183 | { |
| 184 | int rv = pthread_mutex_lock (&mq->q.shr->mutex); |
| 185 | if (PREDICT_FALSE (rv == EOWNERDEAD)) |
| 186 | { |
| 187 | rv = pthread_mutex_consistent (&mq->q.shr->mutex); |
| 188 | return; |
| 189 | } |
| 190 | } |
| 191 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 192 | (void) pthread_cond_broadcast (&mq->q.shr->condvar); |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 193 | |
| 194 | if (is_consumer) |
| 195 | pthread_mutex_unlock (&mq->q.shr->mutex); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 196 | } |
| 197 | else |
| 198 | { |
| 199 | int __clib_unused rv; |
| 200 | u64 data = 1; |
| 201 | |
| 202 | if (mq->q.evtfd < 0) |
| 203 | return; |
| 204 | |
| 205 | rv = write (mq->q.evtfd, &data, sizeof (data)); |
| 206 | if (PREDICT_FALSE (rv < 0)) |
| 207 | clib_unix_warning ("signal write on %d returned %d", mq->q.evtfd, rv); |
| 208 | } |
| 209 | } |
| 210 | |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 211 | svm_msg_q_msg_t |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 212 | svm_msg_q_alloc_msg_w_ring (svm_msg_q_t * mq, u32 ring_index) |
| 213 | { |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 214 | svm_msg_q_ring_shared_t *sr; |
| 215 | svm_msg_q_ring_t *ring; |
Florin Coras | 54693d2 | 2018-07-17 10:46:29 -0700 | [diff] [blame] | 216 | svm_msg_q_msg_t msg; |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 217 | |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 218 | ring = svm_msg_q_ring_inline (mq, ring_index); |
| 219 | sr = ring->shr; |
| 220 | |
| 221 | ASSERT (sr->cursize < ring->nitems); |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 222 | msg.ring_index = ring - mq->rings; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 223 | msg.elt_index = sr->tail; |
| 224 | sr->tail = (sr->tail + 1) % ring->nitems; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 225 | clib_atomic_fetch_add_rel (&sr->cursize, 1); |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 226 | return msg; |
| 227 | } |
| 228 | |
| 229 | int |
| 230 | svm_msg_q_lock_and_alloc_msg_w_ring (svm_msg_q_t * mq, u32 ring_index, |
| 231 | u8 noblock, svm_msg_q_msg_t * msg) |
| 232 | { |
| 233 | if (noblock) |
| 234 | { |
| 235 | if (svm_msg_q_try_lock (mq)) |
| 236 | return -1; |
Florin Coras | 2b5fed8 | 2019-07-25 14:51:09 -0700 | [diff] [blame] | 237 | if (PREDICT_FALSE (svm_msg_q_is_full (mq) |
| 238 | || svm_msg_q_ring_is_full (mq, ring_index))) |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 239 | { |
| 240 | svm_msg_q_unlock (mq); |
| 241 | return -2; |
| 242 | } |
| 243 | *msg = svm_msg_q_alloc_msg_w_ring (mq, ring_index); |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 244 | } |
| 245 | else |
| 246 | { |
| 247 | svm_msg_q_lock (mq); |
Florin Coras | 2b5fed8 | 2019-07-25 14:51:09 -0700 | [diff] [blame] | 248 | while (svm_msg_q_is_full (mq) |
| 249 | || svm_msg_q_ring_is_full (mq, ring_index)) |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 250 | svm_msg_q_wait (mq, SVM_MQ_WAIT_FULL); |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 251 | *msg = svm_msg_q_alloc_msg_w_ring (mq, ring_index); |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 252 | } |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | svm_msg_q_msg_t |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 257 | svm_msg_q_alloc_msg (svm_msg_q_t * mq, u32 nbytes) |
| 258 | { |
| 259 | svm_msg_q_msg_t msg = {.as_u64 = ~0 }; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 260 | svm_msg_q_ring_shared_t *sr; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 261 | svm_msg_q_ring_t *ring; |
| 262 | |
| 263 | vec_foreach (ring, mq->rings) |
| 264 | { |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 265 | sr = ring->shr; |
| 266 | if (ring->elsize < nbytes || sr->cursize == ring->nitems) |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 267 | continue; |
| 268 | msg.ring_index = ring - mq->rings; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 269 | msg.elt_index = sr->tail; |
| 270 | sr->tail = (sr->tail + 1) % ring->nitems; |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 271 | clib_atomic_fetch_add_relax (&sr->cursize, 1); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 272 | break; |
| 273 | } |
| 274 | return msg; |
| 275 | } |
| 276 | |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 277 | void * |
| 278 | svm_msg_q_msg_data (svm_msg_q_t * mq, svm_msg_q_msg_t * msg) |
| 279 | { |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 280 | svm_msg_q_ring_t *ring = svm_msg_q_ring_inline (mq, msg->ring_index); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 281 | return svm_msg_q_ring_data (ring, msg->elt_index); |
| 282 | } |
| 283 | |
| 284 | void |
| 285 | svm_msg_q_free_msg (svm_msg_q_t * mq, svm_msg_q_msg_t * msg) |
| 286 | { |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 287 | svm_msg_q_ring_shared_t *sr; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 288 | svm_msg_q_ring_t *ring; |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 289 | u32 need_signal; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 290 | |
Florin Coras | 41c9e04 | 2018-09-11 00:10:41 -0700 | [diff] [blame] | 291 | ASSERT (vec_len (mq->rings) > msg->ring_index); |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 292 | ring = svm_msg_q_ring_inline (mq, msg->ring_index); |
| 293 | sr = ring->shr; |
| 294 | if (msg->elt_index == sr->head) |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 295 | { |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 296 | sr->head = (sr->head + 1) % ring->nitems; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 297 | } |
| 298 | else |
| 299 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 300 | clib_warning ("message out of order: elt %u head %u ring %u", |
| 301 | msg->elt_index, sr->head, msg->ring_index); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 302 | /* for now, expect messages to be processed in order */ |
| 303 | ASSERT (0); |
| 304 | } |
Florin Coras | fea813a | 2019-12-27 10:26:56 -0800 | [diff] [blame] | 305 | |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 306 | need_signal = clib_atomic_load_relax_n (&sr->cursize) == ring->nitems; |
| 307 | clib_atomic_fetch_sub_relax (&sr->cursize, 1); |
Florin Coras | fea813a | 2019-12-27 10:26:56 -0800 | [diff] [blame] | 308 | |
| 309 | if (PREDICT_FALSE (need_signal)) |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 310 | svm_msg_q_send_signal (mq, 1 /* is consumer */); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | static int |
| 314 | svm_msq_q_msg_is_valid (svm_msg_q_t * mq, svm_msg_q_msg_t * msg) |
| 315 | { |
Florin Coras | 54693d2 | 2018-07-17 10:46:29 -0700 | [diff] [blame] | 316 | u32 dist1, dist2, tail, head; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 317 | svm_msg_q_ring_shared_t *sr; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 318 | svm_msg_q_ring_t *ring; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 319 | |
| 320 | if (vec_len (mq->rings) <= msg->ring_index) |
| 321 | return 0; |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 322 | |
| 323 | ring = svm_msg_q_ring_inline (mq, msg->ring_index); |
| 324 | sr = ring->shr; |
| 325 | tail = sr->tail; |
| 326 | head = sr->head; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 327 | |
Florin Coras | 54693d2 | 2018-07-17 10:46:29 -0700 | [diff] [blame] | 328 | dist1 = ((ring->nitems + msg->elt_index) - head) % ring->nitems; |
| 329 | if (tail == head) |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 330 | dist2 = (sr->cursize == 0) ? 0 : ring->nitems; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 331 | else |
Florin Coras | 54693d2 | 2018-07-17 10:46:29 -0700 | [diff] [blame] | 332 | dist2 = ((ring->nitems + tail) - head) % ring->nitems; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 333 | return (dist1 < dist2); |
| 334 | } |
| 335 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 336 | static void |
| 337 | svm_msg_q_add_raw (svm_msg_q_t *mq, u8 *elem) |
| 338 | { |
| 339 | svm_msg_q_shared_queue_t *sq = mq->q.shr; |
| 340 | i8 *tailp; |
| 341 | u32 sz; |
| 342 | |
| 343 | tailp = (i8 *) (&sq->data[0] + sq->elsize * sq->tail); |
| 344 | clib_memcpy_fast (tailp, elem, sq->elsize); |
| 345 | |
| 346 | sq->tail = (sq->tail + 1) % sq->maxsize; |
| 347 | |
| 348 | sz = clib_atomic_fetch_add_rel (&sq->cursize, 1); |
| 349 | if (!sz) |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 350 | svm_msg_q_send_signal (mq, 0 /* is consumer */); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 351 | } |
| 352 | |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 353 | int |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 354 | svm_msg_q_add (svm_msg_q_t * mq, svm_msg_q_msg_t * msg, int nowait) |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 355 | { |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 356 | ASSERT (svm_msq_q_msg_is_valid (mq, msg)); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 357 | |
| 358 | if (nowait) |
| 359 | { |
| 360 | /* zero on success */ |
| 361 | if (svm_msg_q_try_lock (mq)) |
| 362 | { |
| 363 | return (-1); |
| 364 | } |
| 365 | } |
| 366 | else |
| 367 | svm_msg_q_lock (mq); |
| 368 | |
| 369 | if (PREDICT_FALSE (svm_msg_q_is_full (mq))) |
| 370 | { |
| 371 | if (nowait) |
| 372 | return (-2); |
| 373 | while (svm_msg_q_is_full (mq)) |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 374 | svm_msg_q_wait (mq, SVM_MQ_WAIT_FULL); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | svm_msg_q_add_raw (mq, (u8 *) msg); |
| 378 | |
| 379 | svm_msg_q_unlock (mq); |
| 380 | |
| 381 | return 0; |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | void |
Florin Coras | 52207f1 | 2018-07-12 14:48:06 -0700 | [diff] [blame] | 385 | svm_msg_q_add_and_unlock (svm_msg_q_t * mq, svm_msg_q_msg_t * msg) |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 386 | { |
| 387 | ASSERT (svm_msq_q_msg_is_valid (mq, msg)); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 388 | svm_msg_q_add_raw (mq, (u8 *) msg); |
Florin Coras | 52207f1 | 2018-07-12 14:48:06 -0700 | [diff] [blame] | 389 | svm_msg_q_unlock (mq); |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 392 | int |
| 393 | svm_msg_q_sub_raw (svm_msg_q_t *mq, svm_msg_q_msg_t *elem) |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 394 | { |
| 395 | svm_msg_q_shared_queue_t *sq = mq->q.shr; |
| 396 | i8 *headp; |
| 397 | u32 sz; |
| 398 | |
| 399 | ASSERT (!svm_msg_q_is_empty (mq)); |
| 400 | |
| 401 | headp = (i8 *) (&sq->data[0] + sq->elsize * sq->head); |
| 402 | clib_memcpy_fast (elem, headp, sq->elsize); |
| 403 | |
| 404 | sq->head = (sq->head + 1) % sq->maxsize; |
| 405 | |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 406 | sz = clib_atomic_fetch_sub_relax (&sq->cursize, 1); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 407 | if (PREDICT_FALSE (sz == sq->maxsize)) |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 408 | svm_msg_q_send_signal (mq, 1 /* is consumer */); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 413 | int |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 414 | svm_msg_q_sub_raw_batch (svm_msg_q_t *mq, svm_msg_q_msg_t *msg_buf, u32 n_msgs) |
| 415 | { |
| 416 | svm_msg_q_shared_queue_t *sq = mq->q.shr; |
| 417 | u32 sz, to_deq; |
| 418 | i8 *headp; |
| 419 | |
| 420 | sz = svm_msg_q_size (mq); |
| 421 | ASSERT (sz); |
| 422 | to_deq = clib_min (sz, n_msgs); |
| 423 | |
| 424 | headp = (i8 *) (&sq->data[0] + sq->elsize * sq->head); |
| 425 | |
| 426 | if (sq->head + to_deq < sq->maxsize) |
| 427 | { |
| 428 | clib_memcpy_fast (msg_buf, headp, sq->elsize * to_deq); |
| 429 | sq->head += to_deq; |
| 430 | } |
| 431 | else |
| 432 | { |
| 433 | u32 first_batch = sq->maxsize - sq->head; |
| 434 | clib_memcpy_fast (msg_buf, headp, sq->elsize * first_batch); |
| 435 | clib_memcpy_fast (msg_buf + first_batch, sq->data, |
| 436 | sq->elsize * (to_deq - first_batch)); |
| 437 | sq->head = (sq->head + to_deq) % sq->maxsize; |
| 438 | } |
| 439 | |
| 440 | clib_atomic_fetch_sub_relax (&sq->cursize, to_deq); |
| 441 | if (PREDICT_FALSE (sz == sq->maxsize)) |
| 442 | svm_msg_q_send_signal (mq, 1 /* is consumer */); |
| 443 | |
| 444 | return to_deq; |
| 445 | } |
| 446 | |
| 447 | int |
| 448 | svm_msg_q_sub (svm_msg_q_t *mq, svm_msg_q_msg_t *msg, |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 449 | svm_q_conditional_wait_t cond, u32 time) |
| 450 | { |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 451 | int rc = 0; |
| 452 | |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 453 | if (svm_msg_q_is_empty (mq)) |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 454 | { |
| 455 | if (cond == SVM_Q_NOWAIT) |
| 456 | { |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 457 | return (-2); |
| 458 | } |
| 459 | else if (cond == SVM_Q_TIMEDWAIT) |
| 460 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 461 | if ((rc = svm_msg_q_timedwait (mq, time))) |
| 462 | return rc; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 463 | } |
| 464 | else |
| 465 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 466 | svm_msg_q_wait (mq, SVM_MQ_WAIT_EMPTY); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 467 | } |
| 468 | } |
| 469 | |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 470 | svm_msg_q_sub_raw (mq, msg); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 471 | |
| 472 | return 0; |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 473 | } |
| 474 | |
Florin Coras | 3c2fed5 | 2018-07-04 04:15:05 -0700 | [diff] [blame] | 475 | void |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 476 | svm_msg_q_set_eventfd (svm_msg_q_t *mq, int fd) |
Florin Coras | 9936831 | 2018-08-02 10:45:44 -0700 | [diff] [blame] | 477 | { |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 478 | mq->q.evtfd = fd; |
Florin Coras | 9936831 | 2018-08-02 10:45:44 -0700 | [diff] [blame] | 479 | } |
| 480 | |
| 481 | int |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 482 | svm_msg_q_alloc_eventfd (svm_msg_q_t *mq) |
Florin Coras | 9936831 | 2018-08-02 10:45:44 -0700 | [diff] [blame] | 483 | { |
| 484 | int fd; |
| 485 | if ((fd = eventfd (0, EFD_NONBLOCK)) < 0) |
| 486 | return -1; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 487 | svm_msg_q_set_eventfd (mq, fd); |
Florin Coras | 9936831 | 2018-08-02 10:45:44 -0700 | [diff] [blame] | 488 | return 0; |
| 489 | } |
| 490 | |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 491 | int |
| 492 | svm_msg_q_wait (svm_msg_q_t *mq, svm_msg_q_wait_type_t type) |
Florin Coras | 9936831 | 2018-08-02 10:45:44 -0700 | [diff] [blame] | 493 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 494 | u8 (*fn) (svm_msg_q_t *); |
| 495 | int rv; |
| 496 | |
| 497 | fn = (type == SVM_MQ_WAIT_EMPTY) ? svm_msg_q_is_empty : svm_msg_q_is_full; |
| 498 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 499 | if (mq->q.evtfd == -1) |
| 500 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 501 | rv = pthread_mutex_lock (&mq->q.shr->mutex); |
| 502 | if (PREDICT_FALSE (rv == EOWNERDEAD)) |
| 503 | { |
| 504 | rv = pthread_mutex_consistent (&mq->q.shr->mutex); |
| 505 | return rv; |
| 506 | } |
| 507 | |
| 508 | while (fn (mq)) |
| 509 | pthread_cond_wait (&mq->q.shr->condvar, &mq->q.shr->mutex); |
| 510 | |
| 511 | pthread_mutex_unlock (&mq->q.shr->mutex); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 512 | } |
| 513 | else |
| 514 | { |
| 515 | u64 buf; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 516 | |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 517 | while (fn (mq)) |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 518 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 519 | while ((rv = read (mq->q.evtfd, &buf, sizeof (buf))) < 0) |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 520 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 521 | if (errno != EAGAIN) |
| 522 | { |
| 523 | clib_unix_warning ("read error"); |
| 524 | return rv; |
| 525 | } |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 526 | } |
| 527 | } |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 528 | } |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 529 | |
| 530 | return 0; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | int |
| 534 | svm_msg_q_timedwait (svm_msg_q_t *mq, double timeout) |
| 535 | { |
| 536 | if (mq->q.evtfd == -1) |
| 537 | { |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 538 | svm_msg_q_shared_queue_t *sq = mq->q.shr; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 539 | struct timespec ts; |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 540 | u32 sz; |
| 541 | int rv; |
| 542 | |
| 543 | rv = pthread_mutex_lock (&sq->mutex); |
| 544 | if (PREDICT_FALSE (rv == EOWNERDEAD)) |
| 545 | { |
| 546 | rv = pthread_mutex_consistent (&sq->mutex); |
| 547 | return rv; |
| 548 | } |
| 549 | |
| 550 | /* check if we're still in a signalable state after grabbing lock */ |
| 551 | sz = svm_msg_q_size (mq); |
| 552 | if (sz != 0 && sz != sq->maxsize) |
| 553 | { |
| 554 | pthread_mutex_unlock (&sq->mutex); |
| 555 | return 0; |
| 556 | } |
| 557 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 558 | ts.tv_sec = unix_time_now () + (u32) timeout; |
| 559 | ts.tv_nsec = (timeout - (u32) timeout) * 1e9; |
Florin Coras | 5398dfb | 2021-01-25 20:31:27 -0800 | [diff] [blame^] | 560 | rv = pthread_cond_timedwait (&sq->condvar, &sq->mutex, &ts); |
| 561 | |
| 562 | pthread_mutex_unlock (&sq->mutex); |
| 563 | return rv; |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 564 | } |
| 565 | else |
| 566 | { |
| 567 | struct timeval tv; |
| 568 | u64 buf; |
| 569 | int rv; |
| 570 | |
| 571 | tv.tv_sec = (u64) timeout; |
| 572 | tv.tv_usec = ((u64) timeout - (u64) timeout) * 1e9; |
| 573 | setsockopt (mq->q.evtfd, SOL_SOCKET, SO_RCVTIMEO, (const char *) &tv, |
| 574 | sizeof tv); |
| 575 | |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 576 | rv = read (mq->q.evtfd, &buf, sizeof (buf)); |
| 577 | if (rv < 0) |
| 578 | clib_warning ("read %u", errno); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 579 | |
| 580 | return rv < 0 ? errno : 0; |
| 581 | } |
Florin Coras | 9936831 | 2018-08-02 10:45:44 -0700 | [diff] [blame] | 582 | } |
| 583 | |
Nathan Skrzypczak | cfdb109 | 2019-12-02 16:44:42 +0100 | [diff] [blame] | 584 | u8 * |
| 585 | format_svm_msg_q (u8 * s, va_list * args) |
| 586 | { |
| 587 | svm_msg_q_t *mq = va_arg (*args, svm_msg_q_t *); |
Florin Coras | 86f1232 | 2021-01-22 15:05:14 -0800 | [diff] [blame] | 588 | s = format (s, " [Q:%d/%d]", mq->q.shr->cursize, mq->q.shr->maxsize); |
Nathan Skrzypczak | cfdb109 | 2019-12-02 16:44:42 +0100 | [diff] [blame] | 589 | for (u32 i = 0; i < vec_len (mq->rings); i++) |
| 590 | { |
Florin Coras | b462418 | 2020-12-11 13:58:12 -0800 | [diff] [blame] | 591 | s = format (s, " [R%d:%d/%d]", i, mq->rings[i].shr->cursize, |
Nathan Skrzypczak | cfdb109 | 2019-12-02 16:44:42 +0100 | [diff] [blame] | 592 | mq->rings[i].nitems); |
| 593 | } |
| 594 | return s; |
| 595 | } |
| 596 | |
Florin Coras | 65784c1 | 2018-07-04 04:17:41 -0700 | [diff] [blame] | 597 | /* |
| 598 | * fd.io coding-style-patch-verification: ON |
| 599 | * |
| 600 | * Local Variables: |
| 601 | * eval: (c-set-style "gnu") |
| 602 | * End: |
| 603 | */ |