Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 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 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 16 | #include <svm/svm_fifo.h> |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 17 | #include <vppinfra/cpu.h> |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 18 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 19 | static inline u8 |
| 20 | position_lt (svm_fifo_t * f, u32 a, u32 b) |
| 21 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 22 | return (ooo_segment_distance_from_tail (f, a) |
| 23 | < ooo_segment_distance_from_tail (f, b)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 24 | } |
| 25 | |
| 26 | static inline u8 |
| 27 | position_leq (svm_fifo_t * f, u32 a, u32 b) |
| 28 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 29 | return (ooo_segment_distance_from_tail (f, a) |
| 30 | <= ooo_segment_distance_from_tail (f, b)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | static inline u8 |
| 34 | position_gt (svm_fifo_t * f, u32 a, u32 b) |
| 35 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 36 | return (ooo_segment_distance_from_tail (f, a) |
| 37 | > ooo_segment_distance_from_tail (f, b)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 38 | } |
| 39 | |
| 40 | static inline u32 |
| 41 | position_diff (svm_fifo_t * f, u32 posa, u32 posb) |
| 42 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 43 | return ooo_segment_distance_from_tail (f, posa) |
| 44 | - ooo_segment_distance_from_tail (f, posb); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | static inline u32 |
| 48 | ooo_segment_end_pos (svm_fifo_t * f, ooo_segment_t * s) |
| 49 | { |
| 50 | return (s->start + s->length) % f->nitems; |
| 51 | } |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 52 | |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 53 | #ifndef CLIB_MARCH_VARIANT |
| 54 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 55 | u8 * |
| 56 | format_ooo_segment (u8 * s, va_list * args) |
| 57 | { |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 58 | svm_fifo_t *f = va_arg (*args, svm_fifo_t *); |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 59 | ooo_segment_t *seg = va_arg (*args, ooo_segment_t *); |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 60 | u32 normalized_start = (seg->start + f->nitems - f->tail) % f->nitems; |
| 61 | s = format (s, "[%u, %u], len %u, next %d, prev %d", normalized_start, |
| 62 | (normalized_start + seg->length) % f->nitems, seg->length, |
| 63 | seg->next, seg->prev); |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 64 | return s; |
| 65 | } |
| 66 | |
| 67 | u8 * |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 68 | svm_fifo_dump_trace (u8 * s, svm_fifo_t * f) |
| 69 | { |
| 70 | #if SVM_FIFO_TRACE |
| 71 | svm_fifo_trace_elem_t *seg = 0; |
| 72 | int i = 0; |
| 73 | |
| 74 | if (f->trace) |
| 75 | { |
| 76 | vec_foreach (seg, f->trace) |
| 77 | { |
| 78 | s = format (s, "{%u, %u, %u}, ", seg->offset, seg->len, seg->action); |
| 79 | i++; |
| 80 | if (i % 5 == 0) |
| 81 | s = format (s, "\n"); |
| 82 | } |
| 83 | s = format (s, "\n"); |
| 84 | } |
| 85 | return s; |
| 86 | #else |
| 87 | return 0; |
| 88 | #endif |
| 89 | } |
| 90 | |
| 91 | u8 * |
| 92 | svm_fifo_replay (u8 * s, svm_fifo_t * f, u8 no_read, u8 verbose) |
| 93 | { |
| 94 | int i, trace_len; |
| 95 | u8 *data = 0; |
| 96 | svm_fifo_trace_elem_t *trace; |
| 97 | u32 offset; |
| 98 | svm_fifo_t *dummy_fifo; |
| 99 | |
| 100 | if (!f) |
| 101 | return s; |
| 102 | |
| 103 | #if SVM_FIFO_TRACE |
| 104 | trace = f->trace; |
| 105 | trace_len = vec_len (trace); |
| 106 | #else |
| 107 | trace = 0; |
| 108 | trace_len = 0; |
| 109 | #endif |
| 110 | |
| 111 | dummy_fifo = svm_fifo_create (f->nitems); |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 112 | clib_memset (f->data, 0xFF, f->nitems); |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 113 | |
| 114 | vec_validate (data, f->nitems); |
| 115 | for (i = 0; i < vec_len (data); i++) |
| 116 | data[i] = i; |
| 117 | |
| 118 | for (i = 0; i < trace_len; i++) |
| 119 | { |
| 120 | offset = trace[i].offset; |
| 121 | if (trace[i].action == 1) |
| 122 | { |
| 123 | if (verbose) |
| 124 | s = format (s, "adding [%u, %u]:", trace[i].offset, |
| 125 | (trace[i].offset + |
| 126 | trace[i].len) % dummy_fifo->nitems); |
| 127 | svm_fifo_enqueue_with_offset (dummy_fifo, trace[i].offset, |
| 128 | trace[i].len, &data[offset]); |
| 129 | } |
| 130 | else if (trace[i].action == 2) |
| 131 | { |
| 132 | if (verbose) |
| 133 | s = format (s, "adding [%u, %u]:", 0, trace[i].len); |
| 134 | svm_fifo_enqueue_nowait (dummy_fifo, trace[i].len, &data[offset]); |
| 135 | } |
| 136 | else if (!no_read) |
| 137 | { |
| 138 | if (verbose) |
| 139 | s = format (s, "read: %u", trace[i].len); |
| 140 | svm_fifo_dequeue_drop (dummy_fifo, trace[i].len); |
| 141 | } |
| 142 | if (verbose) |
| 143 | s = format (s, "%U", format_svm_fifo, dummy_fifo, 1); |
| 144 | } |
| 145 | |
| 146 | s = format (s, "result: %U", format_svm_fifo, dummy_fifo, 1); |
| 147 | |
| 148 | return s; |
| 149 | } |
| 150 | |
| 151 | u8 * |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 152 | format_ooo_list (u8 * s, va_list * args) |
| 153 | { |
| 154 | svm_fifo_t *f = va_arg (*args, svm_fifo_t *); |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 155 | u32 indent = va_arg (*args, u32); |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 156 | u32 ooo_segment_index = f->ooos_list_head; |
| 157 | ooo_segment_t *seg; |
| 158 | |
| 159 | while (ooo_segment_index != OOO_SEGMENT_INVALID_INDEX) |
| 160 | { |
| 161 | seg = pool_elt_at_index (f->ooo_segments, ooo_segment_index); |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 162 | s = format (s, "%U%U\n", format_white_space, indent, format_ooo_segment, |
| 163 | f, seg); |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 164 | ooo_segment_index = seg->next; |
| 165 | } |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 166 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 167 | return s; |
| 168 | } |
| 169 | |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 170 | u8 * |
| 171 | format_svm_fifo (u8 * s, va_list * args) |
| 172 | { |
| 173 | svm_fifo_t *f = va_arg (*args, svm_fifo_t *); |
| 174 | int verbose = va_arg (*args, int); |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 175 | u32 indent; |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 176 | |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 177 | if (!s) |
| 178 | return s; |
| 179 | |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 180 | indent = format_get_indent (s); |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 181 | s = format (s, "cursize %u nitems %u has_event %d\n", |
| 182 | f->cursize, f->nitems, f->has_event); |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 183 | s = format (s, "%Uhead %d tail %d segment manager %u\n", format_white_space, |
| 184 | indent, f->head, f->tail, f->segment_manager); |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 185 | |
| 186 | if (verbose > 1) |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 187 | s = format (s, "%Uvpp session %d thread %d app session %d thread %d\n", |
| 188 | format_white_space, indent, f->master_session_index, |
| 189 | f->master_thread_index, f->client_session_index, |
| 190 | f->client_thread_index); |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 191 | |
| 192 | if (verbose) |
| 193 | { |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 194 | s = format (s, "%Uooo pool %d active elts newest %u\n", |
| 195 | format_white_space, indent, pool_elts (f->ooo_segments), |
| 196 | f->ooos_newest); |
Florin Coras | bb292f4 | 2017-05-19 09:49:19 -0700 | [diff] [blame] | 197 | if (svm_fifo_has_ooo_data (f)) |
Florin Coras | de9a849 | 2018-10-24 22:18:58 -0700 | [diff] [blame] | 198 | s = format (s, " %U", format_ooo_list, f, indent, verbose); |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 199 | } |
| 200 | return s; |
| 201 | } |
| 202 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 203 | /** create an svm fifo, in the current heap. Fails vs blow up the process */ |
| 204 | svm_fifo_t * |
| 205 | svm_fifo_create (u32 data_size_in_bytes) |
| 206 | { |
| 207 | svm_fifo_t *f; |
Dave Barach | 818eb54 | 2017-08-02 13:56:13 -0400 | [diff] [blame] | 208 | u32 rounded_data_size; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 209 | |
Dave Barach | 818eb54 | 2017-08-02 13:56:13 -0400 | [diff] [blame] | 210 | /* always round fifo data size to the next highest power-of-two */ |
| 211 | rounded_data_size = (1 << (max_log2 (data_size_in_bytes))); |
| 212 | f = clib_mem_alloc_aligned_or_null (sizeof (*f) + rounded_data_size, |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 213 | CLIB_CACHE_LINE_BYTES); |
| 214 | if (f == 0) |
| 215 | return 0; |
| 216 | |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 217 | clib_memset (f, 0, sizeof (*f)); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 218 | f->nitems = data_size_in_bytes; |
| 219 | f->ooos_list_head = OOO_SEGMENT_INVALID_INDEX; |
Florin Coras | 326b81e | 2018-10-04 19:03:05 -0700 | [diff] [blame] | 220 | f->ct_session_index = SVM_FIFO_INVALID_SESSION_INDEX; |
Dave Barach | 52851e6 | 2017-08-07 09:35:25 -0400 | [diff] [blame] | 221 | f->refcnt = 1; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 222 | return (f); |
| 223 | } |
| 224 | |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 225 | void |
| 226 | svm_fifo_free (svm_fifo_t * f) |
| 227 | { |
Dave Barach | 52851e6 | 2017-08-07 09:35:25 -0400 | [diff] [blame] | 228 | ASSERT (f->refcnt > 0); |
| 229 | |
| 230 | if (--f->refcnt == 0) |
| 231 | { |
| 232 | pool_free (f->ooo_segments); |
| 233 | clib_mem_free (f); |
| 234 | } |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 235 | } |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 236 | #endif |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 237 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 238 | always_inline ooo_segment_t * |
| 239 | ooo_segment_new (svm_fifo_t * f, u32 start, u32 length) |
| 240 | { |
| 241 | ooo_segment_t *s; |
| 242 | |
| 243 | pool_get (f->ooo_segments, s); |
| 244 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 245 | s->start = start; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 246 | s->length = length; |
| 247 | |
| 248 | s->prev = s->next = OOO_SEGMENT_INVALID_INDEX; |
| 249 | |
| 250 | return s; |
| 251 | } |
| 252 | |
| 253 | always_inline void |
| 254 | ooo_segment_del (svm_fifo_t * f, u32 index) |
| 255 | { |
| 256 | ooo_segment_t *cur, *prev = 0, *next = 0; |
| 257 | cur = pool_elt_at_index (f->ooo_segments, index); |
| 258 | |
| 259 | if (cur->next != OOO_SEGMENT_INVALID_INDEX) |
| 260 | { |
| 261 | next = pool_elt_at_index (f->ooo_segments, cur->next); |
| 262 | next->prev = cur->prev; |
| 263 | } |
| 264 | |
| 265 | if (cur->prev != OOO_SEGMENT_INVALID_INDEX) |
| 266 | { |
| 267 | prev = pool_elt_at_index (f->ooo_segments, cur->prev); |
| 268 | prev->next = cur->next; |
| 269 | } |
| 270 | else |
| 271 | { |
| 272 | f->ooos_list_head = cur->next; |
| 273 | } |
| 274 | |
| 275 | pool_put (f->ooo_segments, cur); |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Add segment to fifo's out-of-order segment list. Takes care of merging |
| 280 | * adjacent segments and removing overlapping ones. |
| 281 | */ |
| 282 | static void |
| 283 | ooo_segment_add (svm_fifo_t * f, u32 offset, u32 length) |
| 284 | { |
| 285 | ooo_segment_t *s, *new_s, *prev, *next, *it; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 286 | u32 new_index, s_end_pos, s_index; |
| 287 | u32 normalized_position, normalized_end_position; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 288 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 289 | ASSERT (offset + length <= ooo_segment_distance_from_tail (f, f->head)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 290 | normalized_position = (f->tail + offset) % f->nitems; |
| 291 | normalized_end_position = (f->tail + offset + length) % f->nitems; |
| 292 | |
| 293 | f->ooos_newest = OOO_SEGMENT_INVALID_INDEX; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 294 | |
| 295 | if (f->ooos_list_head == OOO_SEGMENT_INVALID_INDEX) |
| 296 | { |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 297 | s = ooo_segment_new (f, normalized_position, length); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 298 | f->ooos_list_head = s - f->ooo_segments; |
| 299 | f->ooos_newest = f->ooos_list_head; |
| 300 | return; |
| 301 | } |
| 302 | |
| 303 | /* Find first segment that starts after new segment */ |
| 304 | s = pool_elt_at_index (f->ooo_segments, f->ooos_list_head); |
| 305 | while (s->next != OOO_SEGMENT_INVALID_INDEX |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 306 | && position_lt (f, s->start, normalized_position)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 307 | s = pool_elt_at_index (f->ooo_segments, s->next); |
| 308 | |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 309 | /* If we have a previous and we overlap it, use it as starting point */ |
| 310 | prev = ooo_segment_get_prev (f, s); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 311 | if (prev |
| 312 | && position_leq (f, normalized_position, ooo_segment_end_pos (f, prev))) |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 313 | { |
| 314 | s = prev; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 315 | s_end_pos = ooo_segment_end_pos (f, s); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 316 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 317 | /* Since we have previous, normalized start position cannot be smaller |
| 318 | * than prev->start. Check tail */ |
| 319 | ASSERT (position_lt (f, s->start, normalized_position)); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 320 | goto check_tail; |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 323 | s_index = s - f->ooo_segments; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 324 | s_end_pos = ooo_segment_end_pos (f, s); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 325 | |
| 326 | /* No overlap, add before current segment */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 327 | if (position_lt (f, normalized_end_position, s->start)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 328 | { |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 329 | new_s = ooo_segment_new (f, normalized_position, length); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 330 | new_index = new_s - f->ooo_segments; |
| 331 | |
| 332 | /* Pool might've moved, get segment again */ |
| 333 | s = pool_elt_at_index (f->ooo_segments, s_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 334 | if (s->prev != OOO_SEGMENT_INVALID_INDEX) |
| 335 | { |
| 336 | new_s->prev = s->prev; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 337 | prev = pool_elt_at_index (f->ooo_segments, new_s->prev); |
| 338 | prev->next = new_index; |
| 339 | } |
| 340 | else |
| 341 | { |
| 342 | /* New head */ |
| 343 | f->ooos_list_head = new_index; |
| 344 | } |
| 345 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 346 | new_s->next = s_index; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 347 | s->prev = new_index; |
| 348 | f->ooos_newest = new_index; |
| 349 | return; |
| 350 | } |
| 351 | /* No overlap, add after current segment */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 352 | else if (position_gt (f, normalized_position, s_end_pos)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 353 | { |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 354 | new_s = ooo_segment_new (f, normalized_position, length); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 355 | new_index = new_s - f->ooo_segments; |
| 356 | |
| 357 | /* Pool might've moved, get segment again */ |
| 358 | s = pool_elt_at_index (f->ooo_segments, s_index); |
| 359 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 360 | /* Needs to be last */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 361 | ASSERT (s->next == OOO_SEGMENT_INVALID_INDEX); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 362 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 363 | new_s->prev = s_index; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 364 | s->next = new_index; |
| 365 | f->ooos_newest = new_index; |
| 366 | |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | /* |
| 371 | * Merge needed |
| 372 | */ |
| 373 | |
| 374 | /* Merge at head */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 375 | if (position_lt (f, normalized_position, s->start)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 376 | { |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 377 | s->start = normalized_position; |
| 378 | s->length = position_diff (f, s_end_pos, s->start); |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 379 | f->ooos_newest = s - f->ooo_segments; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 380 | } |
| 381 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 382 | check_tail: |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 383 | |
| 384 | /* Overlapping tail */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 385 | if (position_gt (f, normalized_end_position, s_end_pos)) |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 386 | { |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 387 | s->length = position_diff (f, normalized_end_position, s->start); |
| 388 | |
| 389 | /* Remove the completely overlapped segments in the tail */ |
| 390 | it = ooo_segment_next (f, s); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 391 | while (it && position_leq (f, ooo_segment_end_pos (f, it), |
| 392 | normalized_end_position)) |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 393 | { |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 394 | next = ooo_segment_next (f, it); |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 395 | ooo_segment_del (f, it - f->ooo_segments); |
| 396 | it = next; |
| 397 | } |
| 398 | |
| 399 | /* If partial overlap with last, merge */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 400 | if (it && position_leq (f, it->start, normalized_end_position)) |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 401 | { |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 402 | s->length = position_diff (f, ooo_segment_end_pos (f, it), |
| 403 | s->start); |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 404 | ooo_segment_del (f, it - f->ooo_segments); |
| 405 | } |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 406 | f->ooos_newest = s - f->ooo_segments; |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 407 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | /** |
| 411 | * Removes segments that can now be enqueued because the fifo's tail has |
| 412 | * advanced. Returns the number of bytes added to tail. |
| 413 | */ |
| 414 | static int |
| 415 | ooo_segment_try_collect (svm_fifo_t * f, u32 n_bytes_enqueued) |
| 416 | { |
| 417 | ooo_segment_t *s; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 418 | u32 index, bytes = 0; |
| 419 | i32 diff; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 420 | |
| 421 | s = pool_elt_at_index (f->ooo_segments, f->ooos_list_head); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 422 | diff = ooo_segment_distance_to_tail (f, s->start); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 423 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 424 | ASSERT (diff != n_bytes_enqueued); |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 425 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 426 | if (diff > n_bytes_enqueued) |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 427 | return 0; |
| 428 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 429 | /* If last tail update overlaps one/multiple ooo segments, remove them */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 430 | while (0 <= diff && diff < n_bytes_enqueued) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 431 | { |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 432 | index = s - f->ooo_segments; |
| 433 | |
| 434 | /* Segment end is beyond the tail. Advance tail and remove segment */ |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 435 | if (s->length > diff) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 436 | { |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 437 | bytes = s->length - diff; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 438 | f->tail += bytes; |
| 439 | f->tail %= f->nitems; |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 440 | ooo_segment_del (f, index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 441 | break; |
| 442 | } |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 443 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 444 | /* If we have next go on */ |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 445 | if (s->next != OOO_SEGMENT_INVALID_INDEX) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 446 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 447 | s = pool_elt_at_index (f->ooo_segments, s->next); |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 448 | diff = ooo_segment_distance_to_tail (f, s->start); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 449 | ooo_segment_del (f, index); |
| 450 | } |
| 451 | /* End of search */ |
| 452 | else |
| 453 | { |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 454 | ooo_segment_del (f, index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 455 | break; |
| 456 | } |
| 457 | } |
| 458 | |
Chris Luke | ab7b8d9 | 2017-09-07 07:40:13 -0400 | [diff] [blame] | 459 | ASSERT (bytes <= f->nitems); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 460 | return bytes; |
| 461 | } |
| 462 | |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 463 | CLIB_MARCH_FN (svm_fifo_enqueue_nowait, int, svm_fifo_t * f, u32 max_bytes, |
| 464 | const u8 * copy_from_here) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 465 | { |
| 466 | u32 total_copy_bytes, first_copy_bytes, second_copy_bytes; |
| 467 | u32 cursize, nitems; |
| 468 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 469 | /* read cursize, which can only increase while we're working */ |
| 470 | cursize = svm_fifo_max_dequeue (f); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 471 | f->ooos_newest = OOO_SEGMENT_INVALID_INDEX; |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 472 | |
| 473 | if (PREDICT_FALSE (cursize == f->nitems)) |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 474 | return SVM_FIFO_FULL; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 475 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 476 | nitems = f->nitems; |
| 477 | |
| 478 | /* Number of bytes we're going to copy */ |
| 479 | total_copy_bytes = (nitems - cursize) < max_bytes ? |
| 480 | (nitems - cursize) : max_bytes; |
| 481 | |
| 482 | if (PREDICT_TRUE (copy_from_here != 0)) |
| 483 | { |
| 484 | /* Number of bytes in first copy segment */ |
| 485 | first_copy_bytes = ((nitems - f->tail) < total_copy_bytes) |
| 486 | ? (nitems - f->tail) : total_copy_bytes; |
| 487 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 488 | clib_memcpy_fast (&f->data[f->tail], copy_from_here, first_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 489 | f->tail += first_copy_bytes; |
| 490 | f->tail = (f->tail == nitems) ? 0 : f->tail; |
| 491 | |
| 492 | /* Number of bytes in second copy segment, if any */ |
| 493 | second_copy_bytes = total_copy_bytes - first_copy_bytes; |
| 494 | if (second_copy_bytes) |
| 495 | { |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 496 | clib_memcpy_fast (&f->data[f->tail], |
| 497 | copy_from_here + first_copy_bytes, |
| 498 | second_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 499 | f->tail += second_copy_bytes; |
| 500 | f->tail = (f->tail == nitems) ? 0 : f->tail; |
| 501 | } |
| 502 | } |
| 503 | else |
| 504 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 505 | ASSERT (0); |
| 506 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 507 | /* Account for a zero-copy enqueue done elsewhere */ |
| 508 | ASSERT (max_bytes <= (nitems - cursize)); |
| 509 | f->tail += max_bytes; |
| 510 | f->tail = f->tail % nitems; |
| 511 | total_copy_bytes = max_bytes; |
| 512 | } |
| 513 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 514 | svm_fifo_trace_add (f, f->head, total_copy_bytes, 2); |
| 515 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 516 | /* Any out-of-order segments to collect? */ |
| 517 | if (PREDICT_FALSE (f->ooos_list_head != OOO_SEGMENT_INVALID_INDEX)) |
| 518 | total_copy_bytes += ooo_segment_try_collect (f, total_copy_bytes); |
| 519 | |
| 520 | /* Atomically increase the queue length */ |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 521 | ASSERT (cursize + total_copy_bytes <= nitems); |
Sirshak Das | 2f6d7bb | 2018-10-03 22:53:51 +0000 | [diff] [blame] | 522 | clib_atomic_fetch_add (&f->cursize, total_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 523 | |
| 524 | return (total_copy_bytes); |
| 525 | } |
| 526 | |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 527 | #ifndef CLIB_MARCH_VARIANT |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 528 | int |
Florin Coras | 371ca50 | 2018-02-21 12:07:41 -0800 | [diff] [blame] | 529 | svm_fifo_enqueue_nowait (svm_fifo_t * f, u32 max_bytes, |
| 530 | const u8 * copy_from_here) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 531 | { |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 532 | return CLIB_MARCH_FN_SELECT (svm_fifo_enqueue_nowait) (f, max_bytes, |
| 533 | copy_from_here); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 534 | } |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 535 | #endif |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 536 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 537 | /** |
| 538 | * Enqueue a future segment. |
| 539 | * |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 540 | * Two choices: either copies the entire segment, or copies nothing |
| 541 | * Returns 0 of the entire segment was copied |
| 542 | * Returns -1 if none of the segment was copied due to lack of space |
| 543 | */ |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 544 | CLIB_MARCH_FN (svm_fifo_enqueue_with_offset, int, svm_fifo_t * f, |
| 545 | u32 offset, u32 required_bytes, u8 * copy_from_here) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 546 | { |
| 547 | u32 total_copy_bytes, first_copy_bytes, second_copy_bytes; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 548 | u32 cursize, nitems, normalized_offset; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 549 | |
| 550 | f->ooos_newest = OOO_SEGMENT_INVALID_INDEX; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 551 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 552 | /* read cursize, which can only increase while we're working */ |
| 553 | cursize = svm_fifo_max_dequeue (f); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 554 | nitems = f->nitems; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 555 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 556 | ASSERT (required_bytes < nitems); |
| 557 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 558 | normalized_offset = (f->tail + offset) % nitems; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 559 | |
| 560 | /* Will this request fit? */ |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 561 | if ((required_bytes + offset) > (nitems - cursize)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 562 | return -1; |
| 563 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 564 | svm_fifo_trace_add (f, offset, required_bytes, 1); |
| 565 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 566 | ooo_segment_add (f, offset, required_bytes); |
| 567 | |
| 568 | /* Number of bytes we're going to copy */ |
| 569 | total_copy_bytes = required_bytes; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 570 | |
| 571 | /* Number of bytes in first copy segment */ |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 572 | first_copy_bytes = ((nitems - normalized_offset) < total_copy_bytes) |
| 573 | ? (nitems - normalized_offset) : total_copy_bytes; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 574 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 575 | clib_memcpy_fast (&f->data[normalized_offset], copy_from_here, |
| 576 | first_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 577 | |
| 578 | /* Number of bytes in second copy segment, if any */ |
| 579 | second_copy_bytes = total_copy_bytes - first_copy_bytes; |
| 580 | if (second_copy_bytes) |
| 581 | { |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 582 | normalized_offset += first_copy_bytes; |
| 583 | normalized_offset %= nitems; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 584 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 585 | ASSERT (normalized_offset == 0); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 586 | |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 587 | clib_memcpy_fast (&f->data[normalized_offset], |
| 588 | copy_from_here + first_copy_bytes, second_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | return (0); |
| 592 | } |
| 593 | |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 594 | #ifndef CLIB_MARCH_VARIANT |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 595 | |
| 596 | int |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 597 | svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset, u32 required_bytes, |
| 598 | u8 * copy_from_here) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 599 | { |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 600 | return CLIB_MARCH_FN_SELECT (svm_fifo_enqueue_with_offset) (f, offset, |
| 601 | required_bytes, |
| 602 | copy_from_here); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 603 | } |
| 604 | |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 605 | void |
| 606 | svm_fifo_overwrite_head (svm_fifo_t * f, u8 * data, u32 len) |
| 607 | { |
| 608 | u32 first_chunk; |
Florin Coras | 8e43d04 | 2018-05-04 15:46:57 -0700 | [diff] [blame] | 609 | first_chunk = f->nitems - f->head; |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 610 | ASSERT (len <= f->nitems); |
Florin Coras | 8e43d04 | 2018-05-04 15:46:57 -0700 | [diff] [blame] | 611 | if (len <= first_chunk) |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 612 | clib_memcpy_fast (&f->data[f->head], data, len); |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 613 | else |
| 614 | { |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 615 | clib_memcpy_fast (&f->data[f->head], data, first_chunk); |
| 616 | clib_memcpy_fast (&f->data[0], data + first_chunk, len - first_chunk); |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 617 | } |
| 618 | } |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 619 | #endif |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 620 | |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 621 | CLIB_MARCH_FN (svm_fifo_dequeue_nowait, int, svm_fifo_t * f, u32 max_bytes, |
| 622 | u8 * copy_here) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 623 | { |
| 624 | u32 total_copy_bytes, first_copy_bytes, second_copy_bytes; |
| 625 | u32 cursize, nitems; |
| 626 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 627 | /* read cursize, which can only increase while we're working */ |
| 628 | cursize = svm_fifo_max_dequeue (f); |
| 629 | if (PREDICT_FALSE (cursize == 0)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 630 | return -2; /* nothing in the fifo */ |
| 631 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 632 | nitems = f->nitems; |
| 633 | |
| 634 | /* Number of bytes we're going to copy */ |
| 635 | total_copy_bytes = (cursize < max_bytes) ? cursize : max_bytes; |
| 636 | |
| 637 | if (PREDICT_TRUE (copy_here != 0)) |
| 638 | { |
| 639 | /* Number of bytes in first copy segment */ |
| 640 | first_copy_bytes = ((nitems - f->head) < total_copy_bytes) |
| 641 | ? (nitems - f->head) : total_copy_bytes; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 642 | clib_memcpy_fast (copy_here, &f->data[f->head], first_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 643 | f->head += first_copy_bytes; |
| 644 | f->head = (f->head == nitems) ? 0 : f->head; |
| 645 | |
| 646 | /* Number of bytes in second copy segment, if any */ |
| 647 | second_copy_bytes = total_copy_bytes - first_copy_bytes; |
| 648 | if (second_copy_bytes) |
| 649 | { |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 650 | clib_memcpy_fast (copy_here + first_copy_bytes, |
| 651 | &f->data[f->head], second_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 652 | f->head += second_copy_bytes; |
| 653 | f->head = (f->head == nitems) ? 0 : f->head; |
| 654 | } |
| 655 | } |
| 656 | else |
| 657 | { |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 658 | ASSERT (0); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 659 | /* Account for a zero-copy dequeue done elsewhere */ |
| 660 | ASSERT (max_bytes <= cursize); |
| 661 | f->head += max_bytes; |
| 662 | f->head = f->head % nitems; |
| 663 | cursize -= max_bytes; |
| 664 | total_copy_bytes = max_bytes; |
| 665 | } |
| 666 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 667 | ASSERT (f->head <= nitems); |
| 668 | ASSERT (cursize >= total_copy_bytes); |
Sirshak Das | 2f6d7bb | 2018-10-03 22:53:51 +0000 | [diff] [blame] | 669 | clib_atomic_fetch_sub (&f->cursize, total_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 670 | |
| 671 | return (total_copy_bytes); |
| 672 | } |
| 673 | |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 674 | #ifndef CLIB_MARCH_VARIANT |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 675 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 676 | int |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 677 | svm_fifo_dequeue_nowait (svm_fifo_t * f, u32 max_bytes, u8 * copy_here) |
| 678 | { |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 679 | return CLIB_MARCH_FN_SELECT (svm_fifo_dequeue_nowait) (f, max_bytes, |
| 680 | copy_here); |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 681 | } |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 682 | #endif |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 683 | |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 684 | CLIB_MARCH_FN (svm_fifo_peek, int, svm_fifo_t * f, u32 relative_offset, |
| 685 | u32 max_bytes, u8 * copy_here) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 686 | { |
| 687 | u32 total_copy_bytes, first_copy_bytes, second_copy_bytes; |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 688 | u32 cursize, nitems, real_head; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 689 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 690 | /* read cursize, which can only increase while we're working */ |
| 691 | cursize = svm_fifo_max_dequeue (f); |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 692 | if (PREDICT_FALSE (cursize < relative_offset)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 693 | return -2; /* nothing in the fifo */ |
| 694 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 695 | nitems = f->nitems; |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 696 | real_head = f->head + relative_offset; |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 697 | real_head = real_head >= nitems ? real_head - nitems : real_head; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 698 | |
| 699 | /* Number of bytes we're going to copy */ |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 700 | total_copy_bytes = (cursize - relative_offset < max_bytes) ? |
| 701 | cursize - relative_offset : max_bytes; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 702 | |
| 703 | if (PREDICT_TRUE (copy_here != 0)) |
| 704 | { |
| 705 | /* Number of bytes in first copy segment */ |
| 706 | first_copy_bytes = |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 707 | ((nitems - real_head) < total_copy_bytes) ? |
| 708 | (nitems - real_head) : total_copy_bytes; |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 709 | clib_memcpy_fast (copy_here, &f->data[real_head], first_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 710 | |
| 711 | /* Number of bytes in second copy segment, if any */ |
| 712 | second_copy_bytes = total_copy_bytes - first_copy_bytes; |
| 713 | if (second_copy_bytes) |
| 714 | { |
Dave Barach | 178cf49 | 2018-11-13 16:34:13 -0500 | [diff] [blame] | 715 | clib_memcpy_fast (copy_here + first_copy_bytes, &f->data[0], |
| 716 | second_copy_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 717 | } |
| 718 | } |
| 719 | return total_copy_bytes; |
| 720 | } |
| 721 | |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 722 | #ifndef CLIB_MARCH_VARIANT |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 723 | |
| 724 | int |
| 725 | svm_fifo_peek (svm_fifo_t * f, u32 relative_offset, u32 max_bytes, |
| 726 | u8 * copy_here) |
| 727 | { |
Florin Coras | 983cc7d | 2018-09-18 23:11:55 -0700 | [diff] [blame] | 728 | return CLIB_MARCH_FN_SELECT (svm_fifo_peek) (f, relative_offset, max_bytes, |
| 729 | copy_here); |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 730 | } |
| 731 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 732 | int |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 733 | svm_fifo_dequeue_drop (svm_fifo_t * f, u32 max_bytes) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 734 | { |
| 735 | u32 total_drop_bytes, first_drop_bytes, second_drop_bytes; |
| 736 | u32 cursize, nitems; |
| 737 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 738 | /* read cursize, which can only increase while we're working */ |
| 739 | cursize = svm_fifo_max_dequeue (f); |
| 740 | if (PREDICT_FALSE (cursize == 0)) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 741 | return -2; /* nothing in the fifo */ |
| 742 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 743 | nitems = f->nitems; |
| 744 | |
| 745 | /* Number of bytes we're going to drop */ |
| 746 | total_drop_bytes = (cursize < max_bytes) ? cursize : max_bytes; |
| 747 | |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 748 | svm_fifo_trace_add (f, f->tail, total_drop_bytes, 3); |
| 749 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 750 | /* Number of bytes in first copy segment */ |
| 751 | first_drop_bytes = |
| 752 | ((nitems - f->head) < total_drop_bytes) ? |
| 753 | (nitems - f->head) : total_drop_bytes; |
| 754 | f->head += first_drop_bytes; |
| 755 | f->head = (f->head == nitems) ? 0 : f->head; |
| 756 | |
| 757 | /* Number of bytes in second drop segment, if any */ |
| 758 | second_drop_bytes = total_drop_bytes - first_drop_bytes; |
| 759 | if (second_drop_bytes) |
| 760 | { |
| 761 | f->head += second_drop_bytes; |
| 762 | f->head = (f->head == nitems) ? 0 : f->head; |
| 763 | } |
| 764 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 765 | ASSERT (f->head <= nitems); |
| 766 | ASSERT (cursize >= total_drop_bytes); |
Sirshak Das | 2f6d7bb | 2018-10-03 22:53:51 +0000 | [diff] [blame] | 767 | clib_atomic_fetch_sub (&f->cursize, total_drop_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 768 | |
| 769 | return total_drop_bytes; |
| 770 | } |
| 771 | |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 772 | void |
| 773 | svm_fifo_dequeue_drop_all (svm_fifo_t * f) |
| 774 | { |
| 775 | f->head = f->tail; |
Sirshak Das | 2f6d7bb | 2018-10-03 22:53:51 +0000 | [diff] [blame] | 776 | clib_atomic_fetch_sub (&f->cursize, f->cursize); |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 777 | } |
| 778 | |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 779 | int |
| 780 | svm_fifo_segments (svm_fifo_t * f, svm_fifo_segment_t * fs) |
| 781 | { |
| 782 | u32 cursize, nitems; |
| 783 | |
| 784 | /* read cursize, which can only increase while we're working */ |
| 785 | cursize = svm_fifo_max_dequeue (f); |
| 786 | if (PREDICT_FALSE (cursize == 0)) |
| 787 | return -2; |
| 788 | |
| 789 | nitems = f->nitems; |
| 790 | |
| 791 | fs[0].len = ((nitems - f->head) < cursize) ? (nitems - f->head) : cursize; |
| 792 | fs[0].data = f->data + f->head; |
| 793 | |
| 794 | if (fs[0].len < cursize) |
| 795 | { |
| 796 | fs[1].len = cursize - fs[0].len; |
| 797 | fs[1].data = f->data; |
| 798 | } |
| 799 | else |
| 800 | { |
| 801 | fs[1].len = 0; |
| 802 | fs[1].data = 0; |
| 803 | } |
| 804 | return cursize; |
| 805 | } |
| 806 | |
| 807 | void |
| 808 | svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_segment_t * fs) |
| 809 | { |
| 810 | u32 total_drop_bytes; |
| 811 | |
| 812 | ASSERT (fs[0].data == f->data + f->head); |
| 813 | if (fs[1].len) |
| 814 | { |
| 815 | f->head = fs[1].len; |
| 816 | total_drop_bytes = fs[0].len + fs[1].len; |
| 817 | } |
| 818 | else |
| 819 | { |
| 820 | f->head = (f->head + fs[0].len) % f->nitems; |
| 821 | total_drop_bytes = fs[0].len; |
| 822 | } |
Sirshak Das | 2f6d7bb | 2018-10-03 22:53:51 +0000 | [diff] [blame] | 823 | clib_atomic_fetch_sub (&f->cursize, total_drop_bytes); |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 824 | } |
| 825 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 826 | u32 |
| 827 | svm_fifo_number_ooo_segments (svm_fifo_t * f) |
| 828 | { |
| 829 | return pool_elts (f->ooo_segments); |
| 830 | } |
| 831 | |
| 832 | ooo_segment_t * |
| 833 | svm_fifo_first_ooo_segment (svm_fifo_t * f) |
| 834 | { |
| 835 | return pool_elt_at_index (f->ooo_segments, f->ooos_list_head); |
| 836 | } |
| 837 | |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 838 | /** |
| 839 | * Set fifo pointers to requested offset |
| 840 | */ |
| 841 | void |
| 842 | svm_fifo_init_pointers (svm_fifo_t * f, u32 pointer) |
| 843 | { |
| 844 | f->head = f->tail = pointer % f->nitems; |
| 845 | } |
| 846 | |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 847 | #endif |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 848 | /* |
| 849 | * fd.io coding-style-patch-verification: ON |
| 850 | * |
| 851 | * Local Variables: |
| 852 | * eval: (c-set-style "gnu") |
| 853 | * End: |
| 854 | */ |