Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1 | /* |
Florin Coras | c5df8c7 | 2019-04-08 07:42:30 -0700 | [diff] [blame] | 2 | * Copyright (c) 2016-2019 Cisco and/or its affiliates. |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 3 | * Copyright (c) 2019 Arm Limited |
| 4 | * Copyright (c) 2010-2017 Intel Corporation and/or its affiliates. |
| 5 | * Copyright (c) 2007-2009 Kip Macy kmacy@freebsd.org |
| 6 | * Inspired from DPDK rte_ring.h (SPSC only) (derived from freebsd bufring.h). |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | * you may not use this file except in compliance with the License. |
| 9 | * You may obtain a copy of the License at: |
| 10 | * |
| 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | * |
| 13 | * Unless required by applicable law or agreed to in writing, software |
| 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | * See the License for the specific language governing permissions and |
| 17 | * limitations under the License. |
| 18 | */ |
| 19 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 20 | #include <svm/svm_fifo.h> |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 21 | #include <vppinfra/cpu.h> |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 22 | |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 23 | CLIB_MARCH_FN (svm_fifo_copy_to_chunk, void, svm_fifo_t * f, |
| 24 | svm_fifo_chunk_t * c, u32 tail_idx, const u8 * src, u32 len, |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 25 | svm_fifo_chunk_t ** last) |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 26 | { |
| 27 | u32 n_chunk; |
| 28 | |
| 29 | ASSERT (tail_idx >= c->start_byte && tail_idx < c->start_byte + c->length); |
| 30 | |
| 31 | tail_idx -= c->start_byte; |
| 32 | n_chunk = c->length - tail_idx; |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 33 | if (n_chunk <= len) |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 34 | { |
| 35 | u32 to_copy = len; |
| 36 | clib_memcpy_fast (&c->data[tail_idx], src, n_chunk); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 37 | c = c->next; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 38 | while ((to_copy -= n_chunk)) |
| 39 | { |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 40 | n_chunk = clib_min (c->length, to_copy); |
| 41 | clib_memcpy_fast (&c->data[0], src + (len - to_copy), n_chunk); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 42 | c = c->length <= to_copy ? c->next : c; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 43 | } |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 44 | if (*last) |
| 45 | *last = c; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 46 | } |
| 47 | else |
| 48 | { |
| 49 | clib_memcpy_fast (&c->data[tail_idx], src, len); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | CLIB_MARCH_FN (svm_fifo_copy_from_chunk, void, svm_fifo_t * f, |
| 54 | svm_fifo_chunk_t * c, u32 head_idx, u8 * dst, u32 len, |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 55 | svm_fifo_chunk_t ** last) |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 56 | { |
| 57 | u32 n_chunk; |
| 58 | |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 59 | ASSERT (head_idx >= c->start_byte && head_idx < c->start_byte + c->length); |
| 60 | |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 61 | head_idx -= c->start_byte; |
| 62 | n_chunk = c->length - head_idx; |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 63 | if (n_chunk <= len) |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 64 | { |
| 65 | u32 to_copy = len; |
| 66 | clib_memcpy_fast (dst, &c->data[head_idx], n_chunk); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 67 | c = c->next; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 68 | while ((to_copy -= n_chunk)) |
| 69 | { |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 70 | n_chunk = clib_min (c->length, to_copy); |
| 71 | clib_memcpy_fast (dst + (len - to_copy), &c->data[0], n_chunk); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 72 | c = c->length <= to_copy ? c->next : c; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 73 | } |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 74 | if (*last) |
| 75 | *last = c; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 76 | } |
| 77 | else |
| 78 | { |
| 79 | clib_memcpy_fast (dst, &c->data[head_idx], len); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | #ifndef CLIB_MARCH_VARIANT |
| 84 | |
| 85 | static inline void |
| 86 | svm_fifo_copy_to_chunk (svm_fifo_t * f, svm_fifo_chunk_t * c, u32 tail_idx, |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 87 | const u8 * src, u32 len, svm_fifo_chunk_t ** last) |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 88 | { |
| 89 | CLIB_MARCH_FN_SELECT (svm_fifo_copy_to_chunk) (f, c, tail_idx, src, len, |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 90 | last); |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | static inline void |
| 94 | svm_fifo_copy_from_chunk (svm_fifo_t * f, svm_fifo_chunk_t * c, u32 head_idx, |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 95 | u8 * dst, u32 len, svm_fifo_chunk_t ** last) |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 96 | { |
| 97 | CLIB_MARCH_FN_SELECT (svm_fifo_copy_from_chunk) (f, c, head_idx, dst, len, |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 98 | last); |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 99 | } |
| 100 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 101 | static inline u8 |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 102 | position_lt (svm_fifo_t * f, u32 a, u32 b, u32 tail) |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 103 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 104 | return (f_distance_to (f, a, tail) < f_distance_to (f, b, tail)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | static inline u8 |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 108 | position_leq (svm_fifo_t * f, u32 a, u32 b, u32 tail) |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 109 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 110 | return (f_distance_to (f, a, tail) <= f_distance_to (f, b, tail)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | static inline u8 |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 114 | position_gt (svm_fifo_t * f, u32 a, u32 b, u32 tail) |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 115 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 116 | return (f_distance_to (f, a, tail) > f_distance_to (f, b, tail)); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | static inline u32 |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 120 | position_diff (svm_fifo_t * f, u32 a, u32 b, u32 tail) |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 121 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 122 | return f_distance_to (f, a, tail) - f_distance_to (f, b, tail); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | static inline u32 |
| 126 | ooo_segment_end_pos (svm_fifo_t * f, ooo_segment_t * s) |
| 127 | { |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 128 | return (s->start + s->length) % f->size; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 129 | } |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 130 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 131 | void |
| 132 | svm_fifo_free_ooo_data (svm_fifo_t * f) |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 133 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 134 | pool_free (f->ooo_segments); |
| 135 | } |
| 136 | |
| 137 | static inline ooo_segment_t * |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 138 | ooo_segment_prev (svm_fifo_t * f, ooo_segment_t * s) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 139 | { |
| 140 | if (s->prev == OOO_SEGMENT_INVALID_INDEX) |
| 141 | return 0; |
| 142 | return pool_elt_at_index (f->ooo_segments, s->prev); |
| 143 | } |
| 144 | |
| 145 | static inline ooo_segment_t * |
| 146 | ooo_segment_next (svm_fifo_t * f, ooo_segment_t * s) |
| 147 | { |
| 148 | if (s->next == OOO_SEGMENT_INVALID_INDEX) |
| 149 | return 0; |
| 150 | return pool_elt_at_index (f->ooo_segments, s->next); |
| 151 | } |
| 152 | |
| 153 | static inline ooo_segment_t * |
| 154 | ooo_segment_alloc (svm_fifo_t * f, u32 start, u32 length) |
| 155 | { |
| 156 | ooo_segment_t *s; |
| 157 | |
| 158 | pool_get (f->ooo_segments, s); |
| 159 | |
| 160 | s->start = start; |
| 161 | s->length = length; |
| 162 | s->prev = s->next = OOO_SEGMENT_INVALID_INDEX; |
| 163 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 164 | return s; |
| 165 | } |
| 166 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 167 | static inline void |
| 168 | ooo_segment_free (svm_fifo_t * f, u32 index) |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 169 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 170 | ooo_segment_t *cur, *prev = 0, *next = 0; |
| 171 | cur = pool_elt_at_index (f->ooo_segments, index); |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 172 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 173 | if (cur->next != OOO_SEGMENT_INVALID_INDEX) |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 174 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 175 | next = pool_elt_at_index (f->ooo_segments, cur->next); |
| 176 | next->prev = cur->prev; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 177 | } |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 178 | |
| 179 | if (cur->prev != OOO_SEGMENT_INVALID_INDEX) |
| 180 | { |
| 181 | prev = pool_elt_at_index (f->ooo_segments, cur->prev); |
| 182 | prev->next = cur->next; |
| 183 | } |
| 184 | else |
| 185 | { |
| 186 | f->ooos_list_head = cur->next; |
| 187 | } |
| 188 | |
| 189 | pool_put (f->ooo_segments, cur); |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 190 | } |
| 191 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 192 | /** |
| 193 | * Add segment to fifo's out-of-order segment list. Takes care of merging |
| 194 | * adjacent segments and removing overlapping ones. |
| 195 | */ |
| 196 | static void |
| 197 | ooo_segment_add (svm_fifo_t * f, u32 offset, u32 head, u32 tail, u32 length) |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 198 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 199 | ooo_segment_t *s, *new_s, *prev, *next, *it; |
| 200 | u32 new_index, s_end_pos, s_index; |
| 201 | u32 offset_pos, offset_end_pos; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 202 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 203 | ASSERT (offset + length <= f_distance_to (f, head, tail) || head == tail); |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 204 | |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 205 | offset_pos = (tail + offset) % f->size; |
| 206 | offset_end_pos = (tail + offset + length) % f->size; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 207 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 208 | f->ooos_newest = OOO_SEGMENT_INVALID_INDEX; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 209 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 210 | if (f->ooos_list_head == OOO_SEGMENT_INVALID_INDEX) |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 211 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 212 | s = ooo_segment_alloc (f, offset_pos, length); |
| 213 | f->ooos_list_head = s - f->ooo_segments; |
| 214 | f->ooos_newest = f->ooos_list_head; |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | /* Find first segment that starts after new segment */ |
| 219 | s = pool_elt_at_index (f->ooo_segments, f->ooos_list_head); |
| 220 | while (s->next != OOO_SEGMENT_INVALID_INDEX |
| 221 | && position_lt (f, s->start, offset_pos, tail)) |
| 222 | s = pool_elt_at_index (f->ooo_segments, s->next); |
| 223 | |
| 224 | /* If we have a previous and we overlap it, use it as starting point */ |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 225 | prev = ooo_segment_prev (f, s); |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 226 | if (prev |
| 227 | && position_leq (f, offset_pos, ooo_segment_end_pos (f, prev), tail)) |
| 228 | { |
| 229 | s = prev; |
| 230 | s_end_pos = ooo_segment_end_pos (f, s); |
| 231 | |
| 232 | /* Since we have previous, offset start position cannot be smaller |
| 233 | * than prev->start. Check tail */ |
| 234 | ASSERT (position_lt (f, s->start, offset_pos, tail)); |
| 235 | goto check_tail; |
| 236 | } |
| 237 | |
| 238 | s_index = s - f->ooo_segments; |
| 239 | s_end_pos = ooo_segment_end_pos (f, s); |
| 240 | |
| 241 | /* No overlap, add before current segment */ |
| 242 | if (position_lt (f, offset_end_pos, s->start, tail)) |
| 243 | { |
| 244 | new_s = ooo_segment_alloc (f, offset_pos, length); |
| 245 | new_index = new_s - f->ooo_segments; |
| 246 | |
| 247 | /* Pool might've moved, get segment again */ |
| 248 | s = pool_elt_at_index (f->ooo_segments, s_index); |
| 249 | if (s->prev != OOO_SEGMENT_INVALID_INDEX) |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 250 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 251 | new_s->prev = s->prev; |
| 252 | prev = pool_elt_at_index (f->ooo_segments, new_s->prev); |
| 253 | prev->next = new_index; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 254 | } |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 255 | else |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 256 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 257 | /* New head */ |
| 258 | f->ooos_list_head = new_index; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 259 | } |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 260 | |
| 261 | new_s->next = s_index; |
| 262 | s->prev = new_index; |
| 263 | f->ooos_newest = new_index; |
| 264 | return; |
| 265 | } |
| 266 | /* No overlap, add after current segment */ |
| 267 | else if (position_gt (f, offset_pos, s_end_pos, tail)) |
| 268 | { |
| 269 | new_s = ooo_segment_alloc (f, offset_pos, length); |
| 270 | new_index = new_s - f->ooo_segments; |
| 271 | |
| 272 | /* Pool might've moved, get segment again */ |
| 273 | s = pool_elt_at_index (f->ooo_segments, s_index); |
| 274 | |
| 275 | /* Needs to be last */ |
| 276 | ASSERT (s->next == OOO_SEGMENT_INVALID_INDEX); |
| 277 | |
| 278 | new_s->prev = s_index; |
| 279 | s->next = new_index; |
| 280 | f->ooos_newest = new_index; |
| 281 | |
| 282 | return; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 283 | } |
| 284 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 285 | /* |
| 286 | * Merge needed |
| 287 | */ |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 288 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 289 | /* Merge at head */ |
| 290 | if (position_lt (f, offset_pos, s->start, tail)) |
| 291 | { |
| 292 | s->start = offset_pos; |
| 293 | s->length = position_diff (f, s_end_pos, s->start, tail); |
| 294 | f->ooos_newest = s - f->ooo_segments; |
| 295 | } |
| 296 | |
| 297 | check_tail: |
| 298 | |
| 299 | /* Overlapping tail */ |
| 300 | if (position_gt (f, offset_end_pos, s_end_pos, tail)) |
| 301 | { |
| 302 | s->length = position_diff (f, offset_end_pos, s->start, tail); |
| 303 | |
| 304 | /* Remove the completely overlapped segments in the tail */ |
| 305 | it = ooo_segment_next (f, s); |
| 306 | while (it && position_leq (f, ooo_segment_end_pos (f, it), |
| 307 | offset_end_pos, tail)) |
| 308 | { |
| 309 | next = ooo_segment_next (f, it); |
| 310 | ooo_segment_free (f, it - f->ooo_segments); |
| 311 | it = next; |
| 312 | } |
| 313 | |
| 314 | /* If partial overlap with last, merge */ |
| 315 | if (it && position_leq (f, it->start, offset_end_pos, tail)) |
| 316 | { |
| 317 | s->length = position_diff (f, ooo_segment_end_pos (f, it), |
| 318 | s->start, tail); |
| 319 | ooo_segment_free (f, it - f->ooo_segments); |
| 320 | } |
| 321 | f->ooos_newest = s - f->ooo_segments; |
| 322 | } |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 323 | } |
| 324 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 325 | /** |
| 326 | * Removes segments that can now be enqueued because the fifo's tail has |
| 327 | * advanced. Returns the number of bytes added to tail. |
| 328 | */ |
| 329 | static int |
| 330 | ooo_segment_try_collect (svm_fifo_t * f, u32 n_bytes_enqueued, u32 * tail) |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 331 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 332 | u32 s_index, bytes = 0; |
| 333 | ooo_segment_t *s; |
| 334 | i32 diff; |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 335 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 336 | s = pool_elt_at_index (f->ooo_segments, f->ooos_list_head); |
| 337 | diff = f_distance_from (f, s->start, *tail); |
| 338 | |
| 339 | ASSERT (diff != n_bytes_enqueued); |
| 340 | |
| 341 | if (diff > n_bytes_enqueued) |
| 342 | return 0; |
| 343 | |
| 344 | /* If last tail update overlaps one/multiple ooo segments, remove them */ |
| 345 | while (0 <= diff && diff < n_bytes_enqueued) |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 346 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 347 | s_index = s - f->ooo_segments; |
| 348 | |
| 349 | /* Segment end is beyond the tail. Advance tail and remove segment */ |
| 350 | if (s->length > diff) |
| 351 | { |
| 352 | bytes = s->length - diff; |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 353 | *tail = (*tail + bytes) % f->size; |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 354 | ooo_segment_free (f, s_index); |
| 355 | break; |
| 356 | } |
| 357 | |
| 358 | /* If we have next go on */ |
| 359 | if (s->next != OOO_SEGMENT_INVALID_INDEX) |
| 360 | { |
| 361 | s = pool_elt_at_index (f->ooo_segments, s->next); |
| 362 | diff = f_distance_from (f, s->start, *tail); |
| 363 | ooo_segment_free (f, s_index); |
| 364 | } |
| 365 | /* End of search */ |
| 366 | else |
| 367 | { |
| 368 | ooo_segment_free (f, s_index); |
| 369 | break; |
| 370 | } |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 371 | } |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 372 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 373 | ASSERT (bytes <= f->nitems); |
| 374 | return bytes; |
Florin Coras | b59a705 | 2017-04-18 22:07:29 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 377 | static ooo_segment_t * |
| 378 | ooo_segment_last (svm_fifo_t * f) |
| 379 | { |
| 380 | ooo_segment_t *s; |
| 381 | |
| 382 | if (f->ooos_list_head == OOO_SEGMENT_INVALID_INDEX) |
| 383 | return 0; |
| 384 | |
| 385 | s = svm_fifo_first_ooo_segment (f); |
| 386 | while (s->next != OOO_SEGMENT_INVALID_INDEX) |
| 387 | s = pool_elt_at_index (f->ooo_segments, s->next); |
| 388 | return s; |
| 389 | } |
| 390 | |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 391 | void |
| 392 | svm_fifo_init (svm_fifo_t * f, u32 size) |
| 393 | { |
| 394 | f->size = size; |
| 395 | /* |
| 396 | * usable size of the fifo set to rounded_data_size - 1 |
| 397 | * to differentiate between free fifo and empty fifo. |
| 398 | */ |
| 399 | f->nitems = f->size - 1; |
| 400 | f->ooos_list_head = OOO_SEGMENT_INVALID_INDEX; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 401 | f->segment_index = SVM_FIFO_INVALID_INDEX; |
| 402 | f->refcnt = 1; |
Florin Coras | 73cad33 | 2019-08-28 17:12:32 -0700 | [diff] [blame] | 403 | f->head = f->tail = f->flags = 0; |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 404 | f->head_chunk = f->tail_chunk = f->ooo_enq = f->ooo_deq = f->start_chunk; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 405 | } |
| 406 | |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 407 | void |
| 408 | svm_fifo_init_chunks (svm_fifo_t * f) |
| 409 | { |
| 410 | svm_fifo_chunk_t *c, *prev; |
| 411 | |
| 412 | if (f->start_chunk->next == f->start_chunk) |
| 413 | return; |
| 414 | |
| 415 | f->flags |= SVM_FIFO_F_MULTI_CHUNK; |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 416 | rb_tree_init (&f->ooo_enq_lookup); |
| 417 | rb_tree_init (&f->ooo_deq_lookup); |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 418 | |
| 419 | f->start_chunk->start_byte = 0; |
| 420 | prev = f->start_chunk; |
| 421 | c = prev->next; |
| 422 | |
| 423 | while (c != f->start_chunk) |
| 424 | { |
| 425 | c->start_byte = prev->start_byte + prev->length; |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 426 | prev = c; |
| 427 | c = c->next; |
| 428 | } |
| 429 | } |
| 430 | |
Florin Coras | b095a3c | 2019-04-25 12:58:46 -0700 | [diff] [blame] | 431 | /** |
| 432 | * Creates a fifo in the current heap. Fails vs blow up the process |
| 433 | */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 434 | svm_fifo_t * |
| 435 | svm_fifo_create (u32 data_size_in_bytes) |
| 436 | { |
Dave Barach | 818eb54 | 2017-08-02 13:56:13 -0400 | [diff] [blame] | 437 | u32 rounded_data_size; |
Florin Coras | cefd5d8 | 2019-05-05 13:19:57 -0700 | [diff] [blame] | 438 | svm_fifo_chunk_t *c; |
| 439 | svm_fifo_t *f; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 440 | |
Florin Coras | cefd5d8 | 2019-05-05 13:19:57 -0700 | [diff] [blame] | 441 | f = clib_mem_alloc_aligned_or_null (sizeof (*f), CLIB_CACHE_LINE_BYTES); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 442 | if (f == 0) |
| 443 | return 0; |
| 444 | |
Dave Barach | b7b9299 | 2018-10-17 10:38:51 -0400 | [diff] [blame] | 445 | clib_memset (f, 0, sizeof (*f)); |
Florin Coras | cefd5d8 | 2019-05-05 13:19:57 -0700 | [diff] [blame] | 446 | |
| 447 | /* always round fifo data size to the next highest power-of-two */ |
| 448 | rounded_data_size = (1 << (max_log2 (data_size_in_bytes))); |
| 449 | c = clib_mem_alloc_aligned_or_null (sizeof (*c) + rounded_data_size, |
| 450 | CLIB_CACHE_LINE_BYTES); |
| 451 | if (!c) |
| 452 | { |
| 453 | clib_mem_free (f); |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | c->next = c; |
| 458 | c->start_byte = 0; |
| 459 | c->length = data_size_in_bytes; |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 460 | c->rb_index = RBTREE_TNIL_INDEX; |
Florin Coras | cefd5d8 | 2019-05-05 13:19:57 -0700 | [diff] [blame] | 461 | f->start_chunk = f->end_chunk = c; |
| 462 | |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 463 | svm_fifo_init (f, data_size_in_bytes); |
| 464 | return f; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 465 | } |
| 466 | |
Florin Coras | b095a3c | 2019-04-25 12:58:46 -0700 | [diff] [blame] | 467 | /** |
| 468 | * Creates a fifo chunk in the current heap |
| 469 | */ |
| 470 | svm_fifo_chunk_t * |
| 471 | svm_fifo_chunk_alloc (u32 size) |
| 472 | { |
| 473 | svm_fifo_chunk_t *c; |
| 474 | u32 rounded_size; |
| 475 | |
| 476 | /* round chunk size to the next highest power-of-two */ |
| 477 | rounded_size = (1 << (max_log2 (size))); |
| 478 | c = clib_mem_alloc_aligned_or_null (sizeof (*c) + rounded_size, |
| 479 | CLIB_CACHE_LINE_BYTES); |
| 480 | if (c == 0) |
| 481 | return 0; |
| 482 | |
| 483 | clib_memset (c, 0, sizeof (*c)); |
| 484 | c->length = rounded_size; |
| 485 | return c; |
| 486 | } |
| 487 | |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 488 | static inline u8 |
| 489 | svm_fifo_chunk_includes_pos (svm_fifo_chunk_t * c, u32 pos) |
| 490 | { |
| 491 | return (pos >= c->start_byte && pos < c->start_byte + c->length); |
| 492 | } |
| 493 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 494 | static rb_node_t * |
| 495 | svm_fifo_find_node_rbtree (rb_tree_t * rt, u32 pos) |
| 496 | { |
| 497 | rb_node_t *cur, *prev; |
| 498 | |
| 499 | cur = rb_node (rt, rt->root); |
| 500 | if (PREDICT_FALSE (rb_node_is_tnil (rt, cur))) |
| 501 | return 0; |
| 502 | |
| 503 | while (pos != cur->key) |
| 504 | { |
| 505 | prev = cur; |
| 506 | if (pos < cur->key) |
| 507 | { |
| 508 | cur = rb_node_left (rt, cur); |
| 509 | if (rb_node_is_tnil (rt, cur)) |
| 510 | { |
| 511 | cur = rb_tree_predecessor (rt, prev); |
| 512 | break; |
| 513 | } |
| 514 | } |
| 515 | else |
| 516 | { |
| 517 | cur = rb_node_right (rt, cur); |
| 518 | if (rb_node_is_tnil (rt, cur)) |
| 519 | { |
| 520 | cur = prev; |
| 521 | break; |
| 522 | } |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | if (rb_node_is_tnil (rt, cur)) |
| 527 | return 0; |
| 528 | |
| 529 | return cur; |
| 530 | } |
| 531 | |
| 532 | static svm_fifo_chunk_t * |
| 533 | svm_fifo_find_chunk_rbtree (rb_tree_t * rt, u32 pos) |
| 534 | { |
| 535 | svm_fifo_chunk_t *c; |
| 536 | rb_node_t *n; |
| 537 | |
| 538 | n = svm_fifo_find_node_rbtree (rt, pos); |
| 539 | if (!n) |
| 540 | return 0; |
| 541 | c = uword_to_pointer (n->opaque, svm_fifo_chunk_t *); |
| 542 | if (svm_fifo_chunk_includes_pos (c, pos)) |
| 543 | return c; |
| 544 | |
| 545 | return 0; |
| 546 | } |
| 547 | |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 548 | /** |
| 549 | * Find chunk for given byte position |
| 550 | * |
| 551 | * @param f fifo |
| 552 | * @param pos normalized position in fifo |
| 553 | * |
| 554 | * @return chunk that includes given position or 0 |
| 555 | */ |
| 556 | static svm_fifo_chunk_t * |
| 557 | svm_fifo_find_chunk (svm_fifo_t * f, u32 pos) |
| 558 | { |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 559 | svm_fifo_chunk_t *c; |
| 560 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 561 | c = f->start_chunk; |
| 562 | do |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 563 | { |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 564 | if (svm_fifo_chunk_includes_pos (c, pos)) |
| 565 | return c; |
| 566 | c = c->next; |
| 567 | } |
| 568 | while (c != f->start_chunk); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 569 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | static void |
| 574 | svm_fifo_update_ooo_enq (svm_fifo_t * f, u32 ref_pos, u32 start_pos, |
| 575 | u32 end_pos) |
| 576 | { |
| 577 | rb_tree_t *rt = &f->ooo_enq_lookup; |
| 578 | svm_fifo_chunk_t *c; |
| 579 | rb_node_t *cur; |
| 580 | |
| 581 | if (svm_fifo_chunk_includes_pos (f->ooo_enq, start_pos) |
| 582 | && svm_fifo_chunk_includes_pos (f->ooo_enq, end_pos) |
| 583 | && ref_pos < start_pos) |
| 584 | return; |
| 585 | |
| 586 | if (rt->root == RBTREE_TNIL_INDEX) |
| 587 | { |
| 588 | c = f->tail_chunk; |
| 589 | c->rb_index = rb_tree_add2 (rt, c->start_byte, pointer_to_uword (c)); |
| 590 | } |
| 591 | else |
| 592 | { |
| 593 | cur = svm_fifo_find_node_rbtree (rt, start_pos); |
| 594 | c = uword_to_pointer (cur->opaque, svm_fifo_chunk_t *); |
| 595 | if (ref_pos > start_pos && c->start_byte > start_pos) |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 596 | { |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 597 | c = f->end_chunk; |
| 598 | ASSERT (c->rb_index != RBTREE_TNIL_INDEX); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 599 | } |
| 600 | } |
| 601 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 602 | if (svm_fifo_chunk_includes_pos (c, start_pos)) |
| 603 | f->ooo_enq = c; |
| 604 | |
| 605 | if (svm_fifo_chunk_includes_pos (c, end_pos) && ref_pos < end_pos) |
| 606 | return; |
| 607 | |
| 608 | do |
| 609 | { |
| 610 | c = c->next; |
| 611 | if (c->rb_index != RBTREE_TNIL_INDEX) |
| 612 | break; |
| 613 | |
| 614 | c->rb_index = rb_tree_add2 (rt, c->start_byte, pointer_to_uword (c)); |
| 615 | |
| 616 | if (svm_fifo_chunk_includes_pos (c, start_pos)) |
| 617 | f->ooo_enq = c; |
| 618 | |
| 619 | } |
| 620 | while (!svm_fifo_chunk_includes_pos (c, end_pos)); |
| 621 | } |
| 622 | |
| 623 | static void |
| 624 | svm_fifo_update_ooo_deq (svm_fifo_t * f, u32 ref_pos, u32 start_pos, |
| 625 | u32 end_pos) |
| 626 | { |
| 627 | rb_tree_t *rt = &f->ooo_deq_lookup; |
| 628 | rb_node_t *cur; |
| 629 | svm_fifo_chunk_t *c; |
| 630 | |
| 631 | if (svm_fifo_chunk_includes_pos (f->ooo_deq, start_pos) |
| 632 | && svm_fifo_chunk_includes_pos (f->ooo_deq, end_pos) |
| 633 | && ref_pos < start_pos) |
| 634 | return; |
| 635 | |
| 636 | if (rt->root == RBTREE_TNIL_INDEX) |
| 637 | { |
| 638 | c = f->head_chunk; |
| 639 | c->rb_index = rb_tree_add2 (rt, c->start_byte, pointer_to_uword (c)); |
| 640 | } |
| 641 | else |
| 642 | { |
| 643 | cur = svm_fifo_find_node_rbtree (rt, start_pos); |
| 644 | c = uword_to_pointer (cur->opaque, svm_fifo_chunk_t *); |
| 645 | if (ref_pos > start_pos && c->start_byte > start_pos) |
| 646 | { |
| 647 | c = f->end_chunk; |
| 648 | ASSERT (c->rb_index != RBTREE_TNIL_INDEX); |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | if (svm_fifo_chunk_includes_pos (c, start_pos)) |
| 653 | f->ooo_deq = c; |
| 654 | |
| 655 | if (svm_fifo_chunk_includes_pos (c, end_pos) && ref_pos < end_pos) |
| 656 | return; |
| 657 | |
| 658 | do |
| 659 | { |
| 660 | c = c->next; |
| 661 | if (c->rb_index != RBTREE_TNIL_INDEX) |
| 662 | break; |
| 663 | |
| 664 | c->rb_index = rb_tree_add2 (rt, c->start_byte, pointer_to_uword (c)); |
| 665 | |
| 666 | if (svm_fifo_chunk_includes_pos (c, start_pos)) |
| 667 | f->ooo_deq = c; |
| 668 | |
| 669 | } |
| 670 | while (!svm_fifo_chunk_includes_pos (c, end_pos)); |
| 671 | } |
| 672 | |
| 673 | void |
| 674 | svm_fifo_ooo_deq_track (svm_fifo_t * f, u32 start_pos, u32 end_pos) |
| 675 | { |
| 676 | rb_tree_t *rt = &f->ooo_deq_lookup; |
| 677 | svm_fifo_chunk_t *c; |
| 678 | |
| 679 | if (svm_fifo_chunk_includes_pos (f->ooo_deq, end_pos) |
| 680 | && start_pos < end_pos) |
| 681 | return; |
| 682 | |
| 683 | c = f->ooo_deq->next; |
| 684 | do |
| 685 | { |
| 686 | ASSERT (c->rb_index == RBTREE_TNIL_INDEX); |
| 687 | rb_tree_add2 (rt, c->start_byte, pointer_to_uword (c)); |
| 688 | |
| 689 | c = c->next; |
| 690 | } |
| 691 | while (!svm_fifo_chunk_includes_pos (c, end_pos)); |
| 692 | } |
| 693 | |
| 694 | static svm_fifo_chunk_t * |
| 695 | svm_fifo_lookup_clear_chunks (svm_fifo_t * f, rb_tree_t * rt, |
| 696 | svm_fifo_chunk_t * start, u32 start_pos, |
| 697 | u32 end_pos) |
| 698 | { |
| 699 | svm_fifo_chunk_t *c; |
| 700 | rb_node_t *n; |
| 701 | |
| 702 | /* Nothing to do if still in the same chunk and not wrapped */ |
| 703 | if (svm_fifo_chunk_includes_pos (start, end_pos) && start_pos < end_pos) |
| 704 | return start; |
| 705 | |
| 706 | c = start; |
| 707 | do |
| 708 | { |
| 709 | if (c->rb_index == RBTREE_TNIL_INDEX) |
| 710 | { |
| 711 | c = c->next; |
| 712 | continue; |
| 713 | } |
| 714 | |
| 715 | n = rb_node (rt, c->rb_index); |
| 716 | rb_tree_del_node (rt, n); |
| 717 | c->rb_index = RBTREE_TNIL_INDEX; |
| 718 | c = c->next; |
| 719 | } |
| 720 | while (!svm_fifo_chunk_includes_pos (c, end_pos)); |
| 721 | |
| 722 | return c; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 723 | } |
| 724 | |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 725 | static inline void |
| 726 | svm_fifo_grow (svm_fifo_t * f, svm_fifo_chunk_t * c) |
| 727 | { |
| 728 | svm_fifo_chunk_t *prev; |
| 729 | u32 add_bytes = 0; |
| 730 | |
| 731 | if (!c) |
| 732 | return; |
| 733 | |
| 734 | f->end_chunk->next = c; |
| 735 | while (c) |
| 736 | { |
| 737 | add_bytes += c->length; |
| 738 | prev = c; |
| 739 | c = c->next; |
| 740 | } |
| 741 | f->end_chunk = prev; |
| 742 | prev->next = f->start_chunk; |
| 743 | f->size += add_bytes; |
| 744 | f->nitems = f->size - 1; |
| 745 | f->new_chunks = 0; |
| 746 | } |
| 747 | |
| 748 | static void |
| 749 | svm_fifo_try_grow (svm_fifo_t * f, u32 new_head) |
| 750 | { |
| 751 | if (new_head > f->tail) |
| 752 | return; |
| 753 | |
| 754 | svm_fifo_grow (f, f->new_chunks); |
| 755 | f->flags &= ~SVM_FIFO_F_GROW; |
| 756 | } |
| 757 | |
| 758 | void |
| 759 | svm_fifo_add_chunk (svm_fifo_t * f, svm_fifo_chunk_t * c) |
| 760 | { |
| 761 | svm_fifo_chunk_t *cur, *prev; |
| 762 | |
| 763 | /* Initialize rbtree if needed and add default chunk to it. Expectation is |
| 764 | * that this is called with the heap where the rbtree's pool is pushed. */ |
| 765 | if (!(f->flags & SVM_FIFO_F_MULTI_CHUNK)) |
| 766 | { |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 767 | ASSERT (f->start_chunk->next == f->start_chunk); |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 768 | rb_tree_init (&f->ooo_enq_lookup); |
| 769 | rb_tree_init (&f->ooo_deq_lookup); |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 770 | f->flags |= SVM_FIFO_F_MULTI_CHUNK; |
| 771 | } |
| 772 | |
Ryujiro Shibuya | 8e20fe7 | 2019-10-16 06:30:02 +0100 | [diff] [blame] | 773 | /* If fifo is not wrapped, update the size now */ |
| 774 | if (!svm_fifo_is_wrapped (f)) |
| 775 | { |
| 776 | /* Initialize chunks and add to lookup rbtree */ |
| 777 | cur = c; |
| 778 | if (f->new_chunks) |
| 779 | { |
| 780 | prev = f->new_chunks; |
| 781 | while (prev->next) |
| 782 | prev = prev->next; |
| 783 | prev->next = c; |
| 784 | } |
| 785 | else |
| 786 | prev = f->end_chunk; |
| 787 | |
| 788 | while (cur) |
| 789 | { |
| 790 | cur->start_byte = prev->start_byte + prev->length; |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 791 | cur->rb_index = RBTREE_TNIL_INDEX; |
Ryujiro Shibuya | 8e20fe7 | 2019-10-16 06:30:02 +0100 | [diff] [blame] | 792 | prev = cur; |
| 793 | cur = cur->next; |
| 794 | } |
| 795 | |
| 796 | ASSERT (!f->new_chunks); |
| 797 | svm_fifo_grow (f, c); |
| 798 | return; |
| 799 | } |
| 800 | |
| 801 | /* Wrapped */ |
| 802 | if (f->flags & SVM_FIFO_F_SINGLE_THREAD_OWNED) |
| 803 | { |
| 804 | ASSERT (f->master_thread_index == os_get_thread_index ()); |
| 805 | |
| 806 | if (!f->new_chunks && f->head_chunk != f->tail_chunk) |
| 807 | { |
| 808 | u32 head = 0, tail = 0; |
| 809 | f_load_head_tail_cons (f, &head, &tail); |
| 810 | |
| 811 | svm_fifo_chunk_t *tmp = f->tail_chunk->next; |
| 812 | |
| 813 | prev = f->tail_chunk; |
| 814 | u32 add_bytes = 0; |
| 815 | cur = prev->next; |
| 816 | while (cur != f->start_chunk) |
| 817 | { |
| 818 | /* remove any existing rb_tree entry */ |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 819 | if (cur->rb_index != RBTREE_TNIL_INDEX) |
| 820 | { |
| 821 | rb_tree_del (&f->ooo_enq_lookup, cur->start_byte); |
| 822 | rb_tree_del (&f->ooo_deq_lookup, cur->start_byte); |
| 823 | } |
| 824 | cur->rb_index = RBTREE_TNIL_INDEX; |
Ryujiro Shibuya | 8e20fe7 | 2019-10-16 06:30:02 +0100 | [diff] [blame] | 825 | cur = cur->next; |
| 826 | } |
| 827 | |
| 828 | /* insert new chunk after the tail_chunk */ |
| 829 | f->tail_chunk->next = c; |
| 830 | while (c) |
| 831 | { |
| 832 | add_bytes += c->length; |
| 833 | c->start_byte = prev->start_byte + prev->length; |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 834 | cur->rb_index = RBTREE_TNIL_INDEX; |
Ryujiro Shibuya | 8e20fe7 | 2019-10-16 06:30:02 +0100 | [diff] [blame] | 835 | |
| 836 | prev = c; |
| 837 | c = c->next; |
| 838 | } |
| 839 | prev->next = tmp; |
| 840 | |
| 841 | /* shift existing chunks along */ |
| 842 | cur = tmp; |
| 843 | while (cur != f->start_chunk) |
| 844 | { |
| 845 | cur->start_byte = prev->start_byte + prev->length; |
Ryujiro Shibuya | 8e20fe7 | 2019-10-16 06:30:02 +0100 | [diff] [blame] | 846 | prev = cur; |
| 847 | cur = cur->next; |
| 848 | } |
| 849 | |
| 850 | f->size += add_bytes; |
| 851 | f->nitems = f->size - 1; |
| 852 | f->new_chunks = 0; |
| 853 | head += add_bytes; |
| 854 | |
| 855 | clib_atomic_store_rel_n (&f->head, head); |
| 856 | ASSERT (svm_fifo_is_sane (f)); |
| 857 | |
| 858 | return; |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | /* Wrapped, and optimization of single-thread-owned fifo cannot be applied */ |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 863 | /* Initialize chunks and add to lookup rbtree */ |
| 864 | cur = c; |
| 865 | if (f->new_chunks) |
| 866 | { |
| 867 | prev = f->new_chunks; |
| 868 | while (prev->next) |
| 869 | prev = prev->next; |
| 870 | prev->next = c; |
| 871 | } |
| 872 | else |
| 873 | prev = f->end_chunk; |
| 874 | |
| 875 | while (cur) |
| 876 | { |
| 877 | cur->start_byte = prev->start_byte + prev->length; |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 878 | cur->rb_index = RBTREE_TNIL_INDEX; |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 879 | prev = cur; |
| 880 | cur = cur->next; |
| 881 | } |
| 882 | |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 883 | /* Postpone size update */ |
| 884 | if (!f->new_chunks) |
| 885 | { |
| 886 | f->new_chunks = c; |
| 887 | f->flags |= SVM_FIFO_F_GROW; |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | /** |
| 892 | * Removes chunks that are after fifo end byte |
| 893 | */ |
| 894 | svm_fifo_chunk_t * |
| 895 | svm_fifo_collect_chunks (svm_fifo_t * f) |
| 896 | { |
| 897 | svm_fifo_chunk_t *list, *cur; |
| 898 | |
| 899 | f->flags &= ~SVM_FIFO_F_COLLECT_CHUNKS; |
| 900 | |
| 901 | list = f->new_chunks; |
| 902 | f->new_chunks = 0; |
| 903 | cur = list; |
| 904 | while (cur) |
| 905 | { |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 906 | if (cur->rb_index != RBTREE_TNIL_INDEX) |
| 907 | { |
| 908 | rb_tree_del (&f->ooo_enq_lookup, cur->start_byte); |
| 909 | rb_tree_del (&f->ooo_deq_lookup, cur->start_byte); |
| 910 | } |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 911 | cur = cur->next; |
| 912 | } |
| 913 | |
| 914 | return list; |
| 915 | } |
| 916 | |
| 917 | void |
| 918 | svm_fifo_try_shrink (svm_fifo_t * f, u32 head, u32 tail) |
| 919 | { |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 920 | u32 len_to_shrink = 0, tail_pos, len, last_pos; |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 921 | svm_fifo_chunk_t *cur, *prev, *next, *start; |
| 922 | |
| 923 | tail_pos = tail; |
| 924 | if (f->ooos_list_head != OOO_SEGMENT_INVALID_INDEX) |
| 925 | { |
| 926 | ooo_segment_t *last = ooo_segment_last (f); |
| 927 | tail_pos = ooo_segment_end_pos (f, last); |
| 928 | } |
| 929 | |
| 930 | if (f->size_decrement) |
| 931 | { |
| 932 | /* Figure out available free space considering that there may be |
| 933 | * ooo segments */ |
| 934 | len = clib_min (f->size_decrement, f_free_count (f, head, tail_pos)); |
| 935 | f->nitems -= len; |
| 936 | f->size_decrement -= len; |
| 937 | } |
| 938 | |
| 939 | /* Remove tail chunks if the following hold: |
| 940 | * - not wrapped |
| 941 | * - last used byte less than start of last chunk |
| 942 | */ |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 943 | if (tail_pos >= head && tail_pos < f->end_chunk->start_byte) |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 944 | { |
| 945 | /* Lookup the last position not to be removed. Since size still needs |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 946 | * to be nitems + 1, nitems must fall within the usable space. Also, |
| 947 | * first segment is not removable, so tail_pos can be 0. */ |
| 948 | last_pos = tail_pos > 0 ? tail_pos - 1 : tail_pos; |
| 949 | prev = svm_fifo_find_chunk (f, clib_max (f->nitems, last_pos)); |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 950 | next = prev->next; |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 951 | /* If tail_pos is first position in next, skip the chunk, otherwise, |
| 952 | * we must update the tail and, if fifo size is 0, even the head. |
| 953 | * We should not invalidate the tail for the caller and must not change |
| 954 | * consumer owned variables from code that's typically called by the |
| 955 | * producer */ |
| 956 | if (next->start_byte == tail_pos) |
| 957 | { |
| 958 | prev = next; |
| 959 | next = next->next; |
| 960 | } |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 961 | while (next != f->start_chunk) |
| 962 | { |
| 963 | cur = next; |
| 964 | next = cur->next; |
| 965 | len_to_shrink += cur->length; |
| 966 | } |
| 967 | if (len_to_shrink) |
| 968 | { |
| 969 | f->size -= len_to_shrink; |
| 970 | start = prev->next; |
| 971 | prev->next = f->start_chunk; |
| 972 | f->end_chunk = prev; |
| 973 | cur->next = f->new_chunks; |
| 974 | f->new_chunks = start; |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | if (!f->size_decrement && f->size == f->nitems + 1) |
| 979 | { |
| 980 | f->flags &= ~SVM_FIFO_F_SHRINK; |
| 981 | f->flags |= SVM_FIFO_F_COLLECT_CHUNKS; |
| 982 | if (f->start_chunk == f->start_chunk->next) |
| 983 | f->flags &= ~SVM_FIFO_F_MULTI_CHUNK; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | /** |
| 988 | * Request to reduce fifo size by amount of bytes |
| 989 | */ |
| 990 | int |
| 991 | svm_fifo_reduce_size (svm_fifo_t * f, u32 len, u8 try_shrink) |
| 992 | { |
| 993 | svm_fifo_chunk_t *cur; |
| 994 | u32 actual_len = 0; |
| 995 | |
Florin Coras | 344ce42 | 2019-05-03 11:46:55 -0700 | [diff] [blame] | 996 | /* Abort if trying to reduce by more than fifo size or if |
| 997 | * fifo is undergoing resizing already */ |
| 998 | if (len >= f->size || f->size > f->nitems + 1 |
| 999 | || (f->flags & SVM_FIFO_F_SHRINK) || (f->flags & SVM_FIFO_F_GROW)) |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1000 | return 0; |
| 1001 | |
| 1002 | /* last chunk that will not be removed */ |
| 1003 | cur = svm_fifo_find_chunk (f, f->nitems - len); |
| 1004 | |
| 1005 | /* sum length of chunks that will be removed */ |
| 1006 | cur = cur->next; |
| 1007 | while (cur != f->start_chunk) |
| 1008 | { |
| 1009 | actual_len += cur->length; |
| 1010 | cur = cur->next; |
| 1011 | } |
| 1012 | |
| 1013 | ASSERT (actual_len <= len); |
| 1014 | if (!actual_len) |
| 1015 | return 0; |
| 1016 | |
| 1017 | f->size_decrement = actual_len; |
| 1018 | f->flags |= SVM_FIFO_F_SHRINK; |
| 1019 | |
| 1020 | if (try_shrink) |
| 1021 | { |
| 1022 | u32 head, tail; |
| 1023 | f_load_head_tail_prod (f, &head, &tail); |
| 1024 | svm_fifo_try_shrink (f, head, tail); |
| 1025 | } |
| 1026 | |
| 1027 | return actual_len; |
| 1028 | } |
| 1029 | |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 1030 | void |
Florin Coras | b095a3c | 2019-04-25 12:58:46 -0700 | [diff] [blame] | 1031 | svm_fifo_free_chunk_lookup (svm_fifo_t * f) |
| 1032 | { |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1033 | rb_tree_free_nodes (&f->ooo_enq_lookup); |
| 1034 | rb_tree_free_nodes (&f->ooo_deq_lookup); |
Florin Coras | b095a3c | 2019-04-25 12:58:46 -0700 | [diff] [blame] | 1035 | } |
| 1036 | |
| 1037 | void |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 1038 | svm_fifo_free (svm_fifo_t * f) |
| 1039 | { |
Dave Barach | 52851e6 | 2017-08-07 09:35:25 -0400 | [diff] [blame] | 1040 | ASSERT (f->refcnt > 0); |
| 1041 | |
| 1042 | if (--f->refcnt == 0) |
| 1043 | { |
Florin Coras | b095a3c | 2019-04-25 12:58:46 -0700 | [diff] [blame] | 1044 | /* ooo data is not allocated on segment heap */ |
| 1045 | svm_fifo_free_chunk_lookup (f); |
Dave Barach | 52851e6 | 2017-08-07 09:35:25 -0400 | [diff] [blame] | 1046 | clib_mem_free (f); |
| 1047 | } |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 1048 | } |
| 1049 | |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 1050 | void |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1051 | svm_fifo_overwrite_head (svm_fifo_t * f, u8 * src, u32 len) |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 1052 | { |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1053 | u32 n_chunk; |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1054 | u32 head, tail, head_idx; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1055 | svm_fifo_chunk_t *c; |
| 1056 | |
| 1057 | ASSERT (len <= f->nitems); |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1058 | |
| 1059 | f_load_head_tail_cons (f, &head, &tail); |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1060 | c = f->head_chunk; |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1061 | head_idx = head - c->start_byte; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1062 | n_chunk = c->length - head_idx; |
| 1063 | if (len <= n_chunk) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1064 | clib_memcpy_fast (&c->data[head_idx], src, len); |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 1065 | else |
| 1066 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1067 | clib_memcpy_fast (&c->data[head_idx], src, n_chunk); |
| 1068 | clib_memcpy_fast (&c->next->data[0], src + n_chunk, len - n_chunk); |
Florin Coras | 7fb0fe1 | 2018-04-09 09:24:52 -0700 | [diff] [blame] | 1069 | } |
| 1070 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1071 | |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1072 | int |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1073 | svm_fifo_enqueue (svm_fifo_t * f, u32 len, const u8 * src) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1074 | { |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1075 | u32 tail, head, free_count; |
| 1076 | |
| 1077 | f_load_head_tail_prod (f, &head, &tail); |
| 1078 | |
| 1079 | /* free space in fifo can only increase during enqueue: SPSC */ |
| 1080 | free_count = f_free_count (f, head, tail); |
| 1081 | |
| 1082 | f->ooos_newest = OOO_SEGMENT_INVALID_INDEX; |
| 1083 | |
| 1084 | if (PREDICT_FALSE (free_count == 0)) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1085 | return SVM_FIFO_EFULL; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1086 | |
| 1087 | /* number of bytes we're going to copy */ |
| 1088 | len = clib_min (free_count, len); |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1089 | svm_fifo_copy_to_chunk (f, f->tail_chunk, tail, src, len, &f->tail_chunk); |
| 1090 | tail = (tail + len) % f->size; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1091 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1092 | svm_fifo_trace_add (f, head, len, 2); |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1093 | |
| 1094 | /* collect out-of-order segments */ |
| 1095 | if (PREDICT_FALSE (f->ooos_list_head != OOO_SEGMENT_INVALID_INDEX)) |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1096 | { |
| 1097 | len += ooo_segment_try_collect (f, len, &tail); |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1098 | if (f->flags & SVM_FIFO_F_MULTI_CHUNK) |
| 1099 | f->tail_chunk = svm_fifo_lookup_clear_chunks (f, &f->ooo_enq_lookup, |
| 1100 | f->tail_chunk, f->tail, |
| 1101 | tail); |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1102 | } |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1103 | |
| 1104 | /* store-rel: producer owned index (paired with load-acq in consumer) */ |
| 1105 | clib_atomic_store_rel_n (&f->tail, tail); |
| 1106 | |
| 1107 | return len; |
| 1108 | } |
| 1109 | |
| 1110 | /** |
| 1111 | * Enqueue a future segment. |
| 1112 | * |
| 1113 | * Two choices: either copies the entire segment, or copies nothing |
| 1114 | * Returns 0 of the entire segment was copied |
| 1115 | * Returns -1 if none of the segment was copied due to lack of space |
| 1116 | */ |
| 1117 | int |
| 1118 | svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset, u32 len, u8 * src) |
| 1119 | { |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1120 | u32 tail, head, free_count, tail_idx; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1121 | |
| 1122 | f_load_head_tail_prod (f, &head, &tail); |
| 1123 | |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1124 | if (PREDICT_FALSE (f->flags & SVM_FIFO_F_SHRINK)) |
| 1125 | svm_fifo_try_shrink (f, head, tail); |
| 1126 | |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1127 | /* free space in fifo can only increase during enqueue: SPSC */ |
| 1128 | free_count = f_free_count (f, head, tail); |
| 1129 | |
| 1130 | /* will this request fit? */ |
| 1131 | if ((len + offset) > free_count) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1132 | return SVM_FIFO_EFULL; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1133 | |
| 1134 | f->ooos_newest = OOO_SEGMENT_INVALID_INDEX; |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1135 | svm_fifo_trace_add (f, offset, len, 1); |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1136 | ooo_segment_add (f, offset, head, tail, len); |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1137 | tail_idx = (tail + offset) % f->size; |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1138 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1139 | if (f->flags & SVM_FIFO_F_MULTI_CHUNK) |
| 1140 | svm_fifo_update_ooo_enq (f, f->tail, tail_idx, |
| 1141 | (tail_idx + len) % f->size); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1142 | |
| 1143 | svm_fifo_copy_to_chunk (f, f->ooo_enq, tail_idx, src, len, &f->ooo_enq); |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1144 | |
| 1145 | return 0; |
| 1146 | } |
| 1147 | |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1148 | /** |
| 1149 | * Advance tail |
| 1150 | */ |
| 1151 | void |
| 1152 | svm_fifo_enqueue_nocopy (svm_fifo_t * f, u32 len) |
| 1153 | { |
| 1154 | u32 tail; |
| 1155 | |
| 1156 | ASSERT (len <= svm_fifo_max_enqueue_prod (f)); |
| 1157 | /* load-relaxed: producer owned index */ |
| 1158 | tail = f->tail; |
| 1159 | tail = (tail + len) % f->size; |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1160 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1161 | if (f->flags & SVM_FIFO_F_MULTI_CHUNK) |
| 1162 | f->tail_chunk = svm_fifo_lookup_clear_chunks (f, &f->ooo_enq_lookup, |
| 1163 | f->tail_chunk, f->tail, |
| 1164 | tail); |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1165 | |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1166 | /* store-rel: producer owned index (paired with load-acq in consumer) */ |
| 1167 | clib_atomic_store_rel_n (&f->tail, tail); |
| 1168 | } |
| 1169 | |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1170 | int |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1171 | svm_fifo_dequeue (svm_fifo_t * f, u32 len, u8 * dst) |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1172 | { |
| 1173 | u32 tail, head, cursize; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1174 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1175 | f_load_head_tail_cons (f, &head, &tail); |
| 1176 | |
| 1177 | /* current size of fifo can only increase during dequeue: SPSC */ |
| 1178 | cursize = f_cursize (f, head, tail); |
| 1179 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 1180 | if (PREDICT_FALSE (cursize == 0)) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1181 | return SVM_FIFO_EEMPTY; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1182 | |
Florin Coras | 99ad2fc | 2019-04-18 21:25:49 -0700 | [diff] [blame] | 1183 | len = clib_min (cursize, len); |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1184 | svm_fifo_copy_from_chunk (f, f->head_chunk, head, dst, len, &f->head_chunk); |
| 1185 | head = (head + len) % f->size; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1186 | |
Florin Coras | a7570b0 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1187 | if (PREDICT_FALSE (f->flags & SVM_FIFO_F_GROW)) |
| 1188 | svm_fifo_try_grow (f, head); |
Florin Coras | 2309e7a | 2019-04-18 18:58:10 -0700 | [diff] [blame] | 1189 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1190 | /* store-rel: consumer owned index (paired with load-acq in producer) */ |
| 1191 | clib_atomic_store_rel_n (&f->head, head); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1192 | |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1193 | return len; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1194 | } |
| 1195 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1196 | int |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1197 | svm_fifo_peek (svm_fifo_t * f, u32 offset, u32 len, u8 * dst) |
Florin Coras | f6359c8 | 2017-06-19 12:26:09 -0400 | [diff] [blame] | 1198 | { |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1199 | u32 tail, head, cursize, head_idx; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1200 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1201 | f_load_head_tail_cons (f, &head, &tail); |
| 1202 | |
| 1203 | /* current size of fifo can only increase during peek: SPSC */ |
| 1204 | cursize = f_cursize (f, head, tail); |
| 1205 | |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1206 | if (PREDICT_FALSE (cursize < offset)) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1207 | return SVM_FIFO_EEMPTY; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1208 | |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1209 | len = clib_min (cursize - offset, len); |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1210 | head_idx = (head + offset) % f->size; |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1211 | |
| 1212 | if (f->flags & SVM_FIFO_F_MULTI_CHUNK) |
| 1213 | svm_fifo_update_ooo_deq (f, head, head_idx, (head_idx + len) % f->size); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1214 | |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1215 | svm_fifo_copy_from_chunk (f, f->ooo_deq, head_idx, dst, len, &f->ooo_deq); |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1216 | return len; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1217 | } |
| 1218 | |
| 1219 | int |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1220 | svm_fifo_dequeue_drop (svm_fifo_t * f, u32 len) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1221 | { |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1222 | u32 total_drop_bytes, tail, head, cursize; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1223 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1224 | f_load_head_tail_cons (f, &head, &tail); |
| 1225 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1226 | /* number of bytes available */ |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1227 | cursize = f_cursize (f, head, tail); |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 1228 | if (PREDICT_FALSE (cursize == 0)) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1229 | return SVM_FIFO_EEMPTY; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1230 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1231 | /* number of bytes we're going to drop */ |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1232 | total_drop_bytes = clib_min (cursize, len); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1233 | |
Nathan Skrzypczak | b4c6775 | 2019-06-20 09:58:37 +0200 | [diff] [blame] | 1234 | svm_fifo_trace_add (f, tail, total_drop_bytes, 3); |
| 1235 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1236 | /* move head */ |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1237 | head = (head + total_drop_bytes) % f->size; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 1238 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1239 | if (f->flags & SVM_FIFO_F_MULTI_CHUNK) |
| 1240 | f->head_chunk = svm_fifo_lookup_clear_chunks (f, &f->ooo_deq_lookup, |
| 1241 | f->head_chunk, f->head, |
| 1242 | head); |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1243 | |
Florin Coras | 0a6562c | 2019-08-05 09:39:47 -0700 | [diff] [blame] | 1244 | if (PREDICT_FALSE (f->flags & SVM_FIFO_F_GROW)) |
| 1245 | svm_fifo_try_grow (f, head); |
| 1246 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1247 | /* store-rel: consumer owned index (paired with load-acq in producer) */ |
| 1248 | clib_atomic_store_rel_n (&f->head, head); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1249 | |
| 1250 | return total_drop_bytes; |
| 1251 | } |
| 1252 | |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 1253 | void |
| 1254 | svm_fifo_dequeue_drop_all (svm_fifo_t * f) |
| 1255 | { |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1256 | /* consumer foreign index */ |
| 1257 | u32 tail = clib_atomic_load_acq_n (&f->tail); |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1258 | |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1259 | if (f->flags & SVM_FIFO_F_MULTI_CHUNK) |
| 1260 | f->head_chunk = svm_fifo_lookup_clear_chunks (f, &f->ooo_deq_lookup, |
| 1261 | f->head_chunk, tail, |
| 1262 | tail - 1); |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1263 | |
Florin Coras | 0a6562c | 2019-08-05 09:39:47 -0700 | [diff] [blame] | 1264 | if (PREDICT_FALSE (f->flags & SVM_FIFO_F_GROW)) |
| 1265 | svm_fifo_try_grow (f, tail); |
| 1266 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1267 | /* store-rel: consumer owned index (paired with load-acq in producer) */ |
| 1268 | clib_atomic_store_rel_n (&f->head, tail); |
Florin Coras | 25579b4 | 2018-06-06 17:55:02 -0700 | [diff] [blame] | 1269 | } |
| 1270 | |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1271 | int |
Florin Coras | 88001c6 | 2019-04-24 14:44:46 -0700 | [diff] [blame] | 1272 | svm_fifo_segments (svm_fifo_t * f, svm_fifo_seg_t * fs) |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1273 | { |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1274 | u32 cursize, head, tail, head_idx; |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1275 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1276 | f_load_head_tail_cons (f, &head, &tail); |
| 1277 | |
| 1278 | /* consumer function, cursize can only increase while we're working */ |
| 1279 | cursize = f_cursize (f, head, tail); |
| 1280 | |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1281 | if (PREDICT_FALSE (cursize == 0)) |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1282 | return SVM_FIFO_EEMPTY; |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1283 | |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1284 | head_idx = head; |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1285 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1286 | if (tail < head) |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1287 | { |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1288 | fs[0].len = f->size - head_idx; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1289 | fs[0].data = f->head_chunk->data + head_idx; |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1290 | fs[1].len = cursize - fs[0].len; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1291 | fs[1].data = f->head_chunk->data; |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1292 | } |
| 1293 | else |
| 1294 | { |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1295 | fs[0].len = cursize; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1296 | fs[0].data = f->head_chunk->data + head_idx; |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1297 | fs[1].len = 0; |
| 1298 | fs[1].data = 0; |
| 1299 | } |
| 1300 | return cursize; |
| 1301 | } |
| 1302 | |
| 1303 | void |
Florin Coras | 88001c6 | 2019-04-24 14:44:46 -0700 | [diff] [blame] | 1304 | svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_seg_t * fs) |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1305 | { |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1306 | u32 head; |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1307 | |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1308 | /* consumer owned index */ |
| 1309 | head = f->head; |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1310 | |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1311 | ASSERT (fs[0].data == f->head_chunk->data + head); |
| 1312 | head = (head + fs[0].len + fs[1].len) % f->size; |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1313 | /* store-rel: consumer owned index (paired with load-acq in producer) */ |
| 1314 | clib_atomic_store_rel_n (&f->head, head); |
| 1315 | } |
| 1316 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1317 | /** |
| 1318 | * Clones fifo |
| 1319 | * |
| 1320 | * Assumptions: |
| 1321 | * - no prod and cons are accessing either dest or src fifo |
| 1322 | * - fifo is not multi chunk |
| 1323 | */ |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1324 | void |
| 1325 | svm_fifo_clone (svm_fifo_t * df, svm_fifo_t * sf) |
| 1326 | { |
| 1327 | u32 head, tail; |
Florin Coras | 0a84680 | 2019-04-09 18:29:14 -0700 | [diff] [blame] | 1328 | clib_memcpy_fast (df->head_chunk->data, sf->head_chunk->data, sf->size); |
Sirshak Das | 28aa539 | 2019-02-05 01:33:33 -0600 | [diff] [blame] | 1329 | |
| 1330 | f_load_head_tail_all_acq (sf, &head, &tail); |
| 1331 | clib_atomic_store_rel_n (&df->head, head); |
| 1332 | clib_atomic_store_rel_n (&df->tail, tail); |
Florin Coras | 2cba853 | 2018-09-11 16:33:36 -0700 | [diff] [blame] | 1333 | } |
| 1334 | |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 1335 | u32 |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1336 | svm_fifo_n_ooo_segments (svm_fifo_t * f) |
Dave Barach | 1f75cfd | 2017-04-14 16:46:44 -0400 | [diff] [blame] | 1337 | { |
| 1338 | return pool_elts (f->ooo_segments); |
| 1339 | } |
| 1340 | |
| 1341 | ooo_segment_t * |
| 1342 | svm_fifo_first_ooo_segment (svm_fifo_t * f) |
| 1343 | { |
| 1344 | return pool_elt_at_index (f->ooo_segments, f->ooos_list_head); |
| 1345 | } |
| 1346 | |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 1347 | /** |
| 1348 | * Set fifo pointers to requested offset |
| 1349 | */ |
| 1350 | void |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1351 | svm_fifo_init_pointers (svm_fifo_t * f, u32 head, u32 tail) |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 1352 | { |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1353 | head = head % f->size; |
| 1354 | tail = tail % f->size; |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1355 | clib_atomic_store_rel_n (&f->head, head); |
| 1356 | clib_atomic_store_rel_n (&f->tail, tail); |
| 1357 | if (f->flags & SVM_FIFO_F_MULTI_CHUNK) |
| 1358 | { |
| 1359 | svm_fifo_chunk_t *c; |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1360 | c = svm_fifo_find_chunk (f, head); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1361 | ASSERT (c != 0); |
| 1362 | f->head_chunk = f->ooo_deq = c; |
Florin Coras | 29a59c3 | 2019-05-02 12:52:19 -0700 | [diff] [blame] | 1363 | c = svm_fifo_find_chunk (f, tail); |
Florin Coras | 4375fa3 | 2019-04-19 15:56:00 -0700 | [diff] [blame] | 1364 | ASSERT (c != 0); |
| 1365 | f->tail_chunk = f->ooo_enq = c; |
| 1366 | } |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 1367 | } |
| 1368 | |
Florin Coras | 72b0428 | 2019-01-14 17:23:11 -0800 | [diff] [blame] | 1369 | void |
| 1370 | svm_fifo_add_subscriber (svm_fifo_t * f, u8 subscriber) |
| 1371 | { |
| 1372 | if (f->n_subscribers >= SVM_FIFO_MAX_EVT_SUBSCRIBERS) |
| 1373 | return; |
| 1374 | f->subscribers[f->n_subscribers++] = subscriber; |
| 1375 | } |
| 1376 | |
| 1377 | void |
| 1378 | svm_fifo_del_subscriber (svm_fifo_t * f, u8 subscriber) |
| 1379 | { |
| 1380 | int i; |
| 1381 | |
| 1382 | for (i = 0; i < f->n_subscribers; i++) |
| 1383 | { |
| 1384 | if (f->subscribers[i] != subscriber) |
| 1385 | continue; |
| 1386 | f->subscribers[i] = f->subscribers[f->n_subscribers - 1]; |
| 1387 | f->n_subscribers--; |
| 1388 | break; |
| 1389 | } |
| 1390 | } |
| 1391 | |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1392 | u8 |
| 1393 | svm_fifo_is_sane (svm_fifo_t * f) |
| 1394 | { |
| 1395 | if (f->size - 1 != f->nitems && !(f->flags & SVM_FIFO_F_SHRINK)) |
| 1396 | return 0; |
| 1397 | if (!svm_fifo_chunk_includes_pos (f->head_chunk, f->head)) |
| 1398 | return 0; |
| 1399 | if (!svm_fifo_chunk_includes_pos (f->tail_chunk, f->tail)) |
| 1400 | return 0; |
| 1401 | |
| 1402 | if (f->start_chunk->next != f->start_chunk) |
| 1403 | { |
| 1404 | svm_fifo_chunk_t *c, *prev = 0, *tmp; |
| 1405 | u32 size = 0; |
| 1406 | |
| 1407 | if (!(f->flags & SVM_FIFO_F_MULTI_CHUNK)) |
| 1408 | return 0; |
| 1409 | |
| 1410 | c = f->start_chunk; |
| 1411 | do |
| 1412 | { |
| 1413 | tmp = svm_fifo_find_chunk (f, c->start_byte); |
| 1414 | if (tmp != c) |
| 1415 | return 0; |
| 1416 | if (prev && (prev->start_byte + prev->length != c->start_byte)) |
| 1417 | return 0; |
Florin Coras | b020806 | 2019-12-12 12:09:29 -0800 | [diff] [blame^] | 1418 | |
| 1419 | if (c->rb_index != RBTREE_TNIL_INDEX) |
| 1420 | { |
| 1421 | u8 found = 0; |
| 1422 | |
| 1423 | tmp = svm_fifo_find_chunk_rbtree (&f->ooo_enq_lookup, |
| 1424 | c->start_byte); |
| 1425 | if (tmp) |
| 1426 | { |
| 1427 | found = 1; |
| 1428 | if (tmp != c) |
| 1429 | return 0; |
| 1430 | } |
| 1431 | |
| 1432 | tmp = svm_fifo_find_chunk_rbtree (&f->ooo_deq_lookup, |
| 1433 | c->start_byte); |
| 1434 | if (tmp) |
| 1435 | { |
| 1436 | if (found) |
| 1437 | return 0; |
| 1438 | |
| 1439 | found = 1; |
| 1440 | if (tmp != c) |
| 1441 | return 0; |
| 1442 | } |
| 1443 | if (!found) |
| 1444 | return 0; |
| 1445 | } |
| 1446 | |
Florin Coras | eaacce4 | 2019-07-02 13:07:37 -0700 | [diff] [blame] | 1447 | size += c->length; |
| 1448 | prev = c; |
| 1449 | c = c->next; |
| 1450 | } |
| 1451 | while (c != f->start_chunk); |
| 1452 | |
| 1453 | if (size != f->size) |
| 1454 | return 0; |
| 1455 | } |
| 1456 | |
| 1457 | return 1; |
| 1458 | } |
| 1459 | |
Ryujiro Shibuya | 8e20fe7 | 2019-10-16 06:30:02 +0100 | [diff] [blame] | 1460 | u8 |
| 1461 | svm_fifo_set_single_thread_owned (svm_fifo_t * f) |
| 1462 | { |
| 1463 | if (f->flags & SVM_FIFO_F_SINGLE_THREAD_OWNED) |
| 1464 | { |
| 1465 | if (f->master_thread_index == os_get_thread_index ()) |
| 1466 | { |
| 1467 | /* just a duplicate call */ |
| 1468 | return 0; |
| 1469 | } |
| 1470 | |
| 1471 | /* already owned by another thread */ |
| 1472 | return 1; |
| 1473 | } |
| 1474 | |
| 1475 | f->flags |= SVM_FIFO_F_SINGLE_THREAD_OWNED; |
| 1476 | return 0; |
| 1477 | } |
| 1478 | |
Florin Coras | 87b15ce | 2019-04-28 21:16:30 -0700 | [diff] [blame] | 1479 | u8 * |
| 1480 | format_ooo_segment (u8 * s, va_list * args) |
| 1481 | { |
| 1482 | svm_fifo_t *f = va_arg (*args, svm_fifo_t *); |
| 1483 | ooo_segment_t *seg = va_arg (*args, ooo_segment_t *); |
| 1484 | u32 normalized_start = (seg->start + f->nitems - f->tail) % f->size; |
| 1485 | s = format (s, "[%u, %u], len %u, next %d, prev %d", normalized_start, |
| 1486 | (normalized_start + seg->length) % f->size, seg->length, |
| 1487 | seg->next, seg->prev); |
| 1488 | return s; |
| 1489 | } |
| 1490 | |
| 1491 | u8 * |
| 1492 | svm_fifo_dump_trace (u8 * s, svm_fifo_t * f) |
| 1493 | { |
| 1494 | #if SVM_FIFO_TRACE |
| 1495 | svm_fifo_trace_elem_t *seg = 0; |
| 1496 | int i = 0; |
| 1497 | |
| 1498 | if (f->trace) |
| 1499 | { |
| 1500 | vec_foreach (seg, f->trace) |
| 1501 | { |
| 1502 | s = format (s, "{%u, %u, %u}, ", seg->offset, seg->len, seg->action); |
| 1503 | i++; |
| 1504 | if (i % 5 == 0) |
| 1505 | s = format (s, "\n"); |
| 1506 | } |
| 1507 | s = format (s, "\n"); |
| 1508 | } |
| 1509 | return s; |
| 1510 | #else |
| 1511 | return 0; |
| 1512 | #endif |
| 1513 | } |
| 1514 | |
| 1515 | u8 * |
| 1516 | svm_fifo_replay (u8 * s, svm_fifo_t * f, u8 no_read, u8 verbose) |
| 1517 | { |
| 1518 | int i, trace_len; |
| 1519 | u8 *data = 0; |
| 1520 | svm_fifo_trace_elem_t *trace; |
| 1521 | u32 offset; |
| 1522 | svm_fifo_t *dummy_fifo; |
| 1523 | |
| 1524 | if (!f) |
| 1525 | return s; |
| 1526 | |
| 1527 | #if SVM_FIFO_TRACE |
| 1528 | trace = f->trace; |
| 1529 | trace_len = vec_len (trace); |
| 1530 | #else |
| 1531 | trace = 0; |
| 1532 | trace_len = 0; |
| 1533 | #endif |
| 1534 | |
| 1535 | dummy_fifo = svm_fifo_create (f->size); |
| 1536 | clib_memset (f->head_chunk->data, 0xFF, f->nitems); |
| 1537 | vec_validate (data, f->nitems); |
| 1538 | for (i = 0; i < vec_len (data); i++) |
| 1539 | data[i] = i; |
| 1540 | |
| 1541 | for (i = 0; i < trace_len; i++) |
| 1542 | { |
| 1543 | offset = trace[i].offset; |
| 1544 | if (trace[i].action == 1) |
| 1545 | { |
| 1546 | if (verbose) |
| 1547 | s = format (s, "adding [%u, %u]:", trace[i].offset, |
| 1548 | (trace[i].offset + trace[i].len) % dummy_fifo->size); |
| 1549 | svm_fifo_enqueue_with_offset (dummy_fifo, trace[i].offset, |
| 1550 | trace[i].len, &data[offset]); |
| 1551 | } |
| 1552 | else if (trace[i].action == 2) |
| 1553 | { |
| 1554 | if (verbose) |
| 1555 | s = format (s, "adding [%u, %u]:", 0, trace[i].len); |
| 1556 | svm_fifo_enqueue (dummy_fifo, trace[i].len, &data[offset]); |
| 1557 | } |
| 1558 | else if (!no_read) |
| 1559 | { |
| 1560 | if (verbose) |
| 1561 | s = format (s, "read: %u", trace[i].len); |
| 1562 | svm_fifo_dequeue_drop (dummy_fifo, trace[i].len); |
| 1563 | } |
| 1564 | if (verbose) |
| 1565 | s = format (s, "%U", format_svm_fifo, dummy_fifo, 1); |
| 1566 | } |
| 1567 | |
| 1568 | s = format (s, "result: %U", format_svm_fifo, dummy_fifo, 1); |
| 1569 | |
| 1570 | return s; |
| 1571 | } |
| 1572 | |
| 1573 | u8 * |
| 1574 | format_ooo_list (u8 * s, va_list * args) |
| 1575 | { |
| 1576 | svm_fifo_t *f = va_arg (*args, svm_fifo_t *); |
| 1577 | u32 indent = va_arg (*args, u32); |
| 1578 | u32 ooo_segment_index = f->ooos_list_head; |
| 1579 | ooo_segment_t *seg; |
| 1580 | |
| 1581 | while (ooo_segment_index != OOO_SEGMENT_INVALID_INDEX) |
| 1582 | { |
| 1583 | seg = pool_elt_at_index (f->ooo_segments, ooo_segment_index); |
| 1584 | s = format (s, "%U%U\n", format_white_space, indent, format_ooo_segment, |
| 1585 | f, seg); |
| 1586 | ooo_segment_index = seg->next; |
| 1587 | } |
| 1588 | |
| 1589 | return s; |
| 1590 | } |
| 1591 | |
| 1592 | u8 * |
| 1593 | format_svm_fifo (u8 * s, va_list * args) |
| 1594 | { |
| 1595 | svm_fifo_t *f = va_arg (*args, svm_fifo_t *); |
| 1596 | int verbose = va_arg (*args, int); |
| 1597 | u32 indent; |
| 1598 | |
| 1599 | if (!s) |
| 1600 | return s; |
| 1601 | |
| 1602 | indent = format_get_indent (s); |
| 1603 | s = format (s, "cursize %u nitems %u has_event %d\n", |
| 1604 | svm_fifo_max_dequeue (f), f->nitems, f->has_event); |
| 1605 | s = format (s, "%Uhead %u tail %u segment manager %u\n", format_white_space, |
| 1606 | indent, (f->head % f->size), (f->tail % f->size), |
| 1607 | f->segment_manager); |
| 1608 | |
| 1609 | if (verbose > 1) |
| 1610 | s = format (s, "%Uvpp session %d thread %d app session %d thread %d\n", |
| 1611 | format_white_space, indent, f->master_session_index, |
| 1612 | f->master_thread_index, f->client_session_index, |
| 1613 | f->client_thread_index); |
| 1614 | |
| 1615 | if (verbose) |
| 1616 | { |
| 1617 | s = format (s, "%Uooo pool %d active elts newest %u\n", |
| 1618 | format_white_space, indent, pool_elts (f->ooo_segments), |
| 1619 | f->ooos_newest); |
| 1620 | if (svm_fifo_has_ooo_data (f)) |
| 1621 | s = format (s, " %U", format_ooo_list, f, indent, verbose); |
| 1622 | } |
| 1623 | return s; |
| 1624 | } |
| 1625 | |
Florin Coras | 3aa7af3 | 2018-06-29 08:44:31 -0700 | [diff] [blame] | 1626 | #endif |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1627 | /* |
| 1628 | * fd.io coding-style-patch-verification: ON |
| 1629 | * |
| 1630 | * Local Variables: |
| 1631 | * eval: (c-set-style "gnu") |
| 1632 | * End: |
| 1633 | */ |