2 * Copyright (c) 2020 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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 #ifndef SRC_SVM_FIFO_TYPES_H_
17 #define SRC_SVM_FIFO_TYPES_H_
20 #include <vppinfra/clib.h>
21 #include <vppinfra/rbtree.h>
22 #include <vppinfra/lock.h>
24 #define FS_MIN_LOG2_CHUNK_SZ 12 /**< also min fifo size */
25 #define FS_MAX_LOG2_CHUNK_SZ 22 /**< 4MB max chunk size */
26 #define FS_CHUNK_VEC_LEN 11 /**< number of chunk sizes */
28 STATIC_ASSERT ((FS_MAX_LOG2_CHUNK_SZ - FS_MIN_LOG2_CHUNK_SZ) ==
30 "update chunk sizes");
32 #define SVM_FIFO_TRACE (0)
33 #define SVM_FIFO_MAX_EVT_SUBSCRIBERS 7
35 typedef struct fifo_segment_header_ fifo_segment_header_t;
37 typedef struct svm_fifo_chunk_
39 u32 start_byte; /**< chunk start byte */
40 u32 length; /**< length of chunk in bytes */
41 struct svm_fifo_chunk_ *next; /**< pointer to next chunk in linked-lists */
42 rb_node_index_t enq_rb_index; /**< enq node index if chunk in rbtree */
43 rb_node_index_t deq_rb_index; /**< deq node index if chunk in rbtree */
44 u8 data[0]; /**< start of chunk data */
49 u32 next; /**< Next linked-list element pool index */
50 u32 prev; /**< Previous linked-list element pool index */
51 u32 start; /**< Start of segment, normalized*/
52 u32 length; /**< Length of segment */
60 } svm_fifo_trace_elem_t;
62 typedef struct svm_fifo_shr_
64 CLIB_CACHE_LINE_ALIGN_MARK (shared);
65 svm_fifo_chunk_t *start_chunk;/**< first chunk in fifo chunk list */
66 svm_fifo_chunk_t *end_chunk; /**< end chunk in fifo chunk list */
67 volatile u32 has_event; /**< non-zero if deq event exists */
68 u32 min_alloc; /**< min chunk alloc if space available */
69 u32 size; /**< size of the fifo in bytes */
70 u32 master_session_index; /**< session layer session index */
71 u32 client_session_index; /**< app session index */
72 u8 slice_index; /**< segment slice for fifo */
73 struct svm_fifo_shr_ *next; /**< next in freelist/active chain */
75 CLIB_CACHE_LINE_ALIGN_MARK (consumer);
76 svm_fifo_chunk_t *head_chunk; /**< tracks chunk where head lands */
77 u32 head; /**< fifo head position/byte */
78 volatile u32 want_deq_ntf; /**< producer wants nudge */
79 volatile u32 has_deq_ntf;
81 CLIB_CACHE_LINE_ALIGN_MARK (producer);
82 u32 tail; /**< fifo tail position/byte */
83 svm_fifo_chunk_t *tail_chunk; /**< tracks chunk where tail lands */
84 volatile u8 n_subscribers; /**< Number of subscribers for io events */
85 u8 subscribers[SVM_FIFO_MAX_EVT_SUBSCRIBERS];
88 typedef struct _svm_fifo
90 CLIB_CACHE_LINE_ALIGN_MARK (cacheline);
91 svm_fifo_shared_t *shr; /**< shared fifo in fifo segment memory */
92 fifo_segment_header_t *fs_hdr; /**< fifo segment header for fifo */
93 rb_tree_t ooo_enq_lookup; /**< rbtree for ooo enq chunk lookup */
94 rb_tree_t ooo_deq_lookup; /**< rbtree for ooo deq chunk lookup */
95 svm_fifo_chunk_t *ooo_deq; /**< last chunk used for ooo dequeue */
96 svm_fifo_chunk_t *ooo_enq; /**< last chunk used for ooo enqueue */
97 ooo_segment_t *ooo_segments; /**< Pool of ooo segments */
98 u32 ooos_list_head; /**< Head of out-of-order linked-list */
99 u32 ooos_newest; /**< Last segment to have been updated */
101 u8 flags; /**< fifo flags */
102 u8 master_thread_index; /**< session layer thread index */
103 u8 client_thread_index; /**< app worker index */
104 i8 refcnt; /**< reference count */
105 u32 segment_manager; /**< session layer segment manager index */
106 u32 segment_index; /**< segment index in segment manager */
108 struct _svm_fifo *next; /**< prev in active chain */
109 struct _svm_fifo *prev; /**< prev in active chain */
112 svm_fifo_trace_elem_t *trace;
116 typedef struct fifo_segment_slice_
118 svm_fifo_chunk_t *free_chunks[FS_CHUNK_VEC_LEN]; /**< Free chunks by size */
119 svm_fifo_t *fifos; /**< Linked list of active RX fifos */
120 svm_fifo_shared_t *free_fifos; /**< Freelists of fifo shared hdrs */
121 uword n_fl_chunk_bytes; /**< Chunk bytes on freelist */
122 uword virtual_mem; /**< Slice sum of all fifo sizes */
123 u32 num_chunks[FS_CHUNK_VEC_LEN]; /**< Allocated chunks by chunk size */
125 CLIB_CACHE_LINE_ALIGN_MARK (lock);
127 } fifo_segment_slice_t;
129 typedef struct fifo_slice_private_
131 clib_mem_bulk_handle_t fifos; /**< Bulk fifo allocator */
132 uword virtual_mem; /**< Slice sum of all fifo sizes */
133 } fifo_slice_private_t;
135 struct fifo_segment_header_
137 uword n_cached_bytes; /**< Cached bytes */
138 u32 n_active_fifos; /**< Number of active fifos */
139 u32 n_reserved_bytes; /**< Bytes not to be allocated */
140 u32 max_log2_fifo_size; /**< Max log2(chunk size) for fs */
141 u8 flags; /**< Segment flags */
142 u8 n_slices; /**< Number of slices */
143 u8 high_watermark; /**< Memory pressure watermark high */
144 u8 low_watermark; /**< Memory pressure watermark low */
145 u8 pct_first_alloc; /**< Pct of fifo size to alloc */
146 CLIB_CACHE_LINE_ALIGN_MARK (allocator);
148 uword max_byte_index;
149 CLIB_CACHE_LINE_ALIGN_MARK (slice);
150 fifo_segment_slice_t slices[0]; /** Fixed array of slices */
153 void fsh_virtual_mem_update (fifo_segment_header_t * fsh, u32 slice_index,
156 #endif /* SRC_SVM_FIFO_TYPES_H_ */
159 * fd.io coding-style-patch-verification: ON
162 * eval: (c-set-style "gnu")