--- /dev/null
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SRC_SVM_FIFO_TYPES_H_
+#define SRC_SVM_FIFO_TYPES_H_
+
+#include <svm/ssvm.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/rbtree.h>
+
+#define SVM_FIFO_TRACE (0)
+#define SVM_FIFO_MAX_EVT_SUBSCRIBERS 7
+
+typedef struct fifo_segment_header_ fifo_segment_header_t;
+
+typedef struct svm_fifo_chunk_
+{
+ u32 start_byte; /**< chunk start byte */
+ u32 length; /**< length of chunk in bytes */
+ struct svm_fifo_chunk_ *next; /**< pointer to next chunk in linked-lists */
+ rb_node_index_t enq_rb_index; /**< enq node index if chunk in rbtree */
+ rb_node_index_t deq_rb_index; /**< deq node index if chunk in rbtree */
+ u8 data[0]; /**< start of chunk data */
+} svm_fifo_chunk_t;
+
+typedef struct
+{
+ u32 next; /**< Next linked-list element pool index */
+ u32 prev; /**< Previous linked-list element pool index */
+ u32 start; /**< Start of segment, normalized*/
+ u32 length; /**< Length of segment */
+} ooo_segment_t;
+
+typedef struct
+{
+ u32 offset;
+ u32 len;
+ u32 action;
+} svm_fifo_trace_elem_t;
+
+typedef struct _svm_fifo
+{
+ CLIB_CACHE_LINE_ALIGN_MARK (shared_first);
+ fifo_segment_header_t *fs_hdr;/**< fifo segment header for fifo */
+ svm_fifo_chunk_t *start_chunk;/**< first chunk in fifo chunk list */
+ svm_fifo_chunk_t *end_chunk; /**< end chunk in fifo chunk list */
+ u32 min_alloc; /**< min chunk alloc if space available */
+ u32 size; /**< size of the fifo in bytes */
+ u8 flags; /**< fifo flags */
+ u8 slice_index; /**< segment slice for fifo */
+
+ CLIB_CACHE_LINE_ALIGN_MARK (shared_second);
+ volatile u32 has_event; /**< non-zero if deq event exists */
+ u32 master_session_index; /**< session layer session index */
+ u32 client_session_index; /**< app session index */
+ u8 master_thread_index; /**< session layer thread index */
+ u8 client_thread_index; /**< app worker index */
+ i8 refcnt; /**< reference count */
+ u32 segment_manager; /**< session layer segment manager index */
+ u32 segment_index; /**< segment index in segment manager */
+ struct _svm_fifo *next; /**< next in freelist/active chain */
+ struct _svm_fifo *prev; /**< prev in active chain */
+
+ CLIB_CACHE_LINE_ALIGN_MARK (consumer);
+ rb_tree_t ooo_deq_lookup; /**< rbtree for ooo deq chunk lookup */
+ svm_fifo_chunk_t *head_chunk; /**< tracks chunk where head lands */
+ svm_fifo_chunk_t *ooo_deq; /**< last chunk used for ooo dequeue */
+ u32 head; /**< fifo head position/byte */
+ volatile u32 want_deq_ntf; /**< producer wants nudge */
+ volatile u32 has_deq_ntf;
+
+ CLIB_CACHE_LINE_ALIGN_MARK (producer);
+ rb_tree_t ooo_enq_lookup; /**< rbtree for ooo enq chunk lookup */
+ u32 tail; /**< fifo tail position/byte */
+ u32 ooos_list_head; /**< Head of out-of-order linked-list */
+ svm_fifo_chunk_t *tail_chunk; /**< tracks chunk where tail lands */
+ svm_fifo_chunk_t *ooo_enq; /**< last chunk used for ooo enqueue */
+ ooo_segment_t *ooo_segments; /**< Pool of ooo segments */
+ u32 ooos_newest; /**< Last segment to have been updated */
+ volatile u8 n_subscribers; /**< Number of subscribers for io events */
+ u8 subscribers[SVM_FIFO_MAX_EVT_SUBSCRIBERS];
+
+#if SVM_FIFO_TRACE
+ svm_fifo_trace_elem_t *trace;
+#endif
+
+} svm_fifo_t;
+
+typedef struct fifo_segment_slice_
+{
+ svm_fifo_t *fifos; /**< Linked list of active RX fifos */
+ svm_fifo_t *free_fifos; /**< Freelists by fifo size */
+ svm_fifo_chunk_t **free_chunks; /**< Freelists by chunk size */
+ uword n_fl_chunk_bytes; /**< Chunk bytes on freelist */
+ clib_spinlock_t chunk_lock;
+} fifo_segment_slice_t;
+
+struct fifo_segment_header_
+{
+ fifo_segment_slice_t *slices; /** Fixed array of slices */
+ ssvm_shared_header_t *ssvm_sh; /**< Pointer to fs ssvm shared hdr */
+ uword n_free_bytes; /**< Segment free bytes */
+ u32 n_active_fifos; /**< Number of active fifos */
+ u32 n_reserved_bytes; /**< Bytes not to be allocated */
+ u32 max_log2_chunk_size; /**< Max log2(chunk size) for fs */
+ u8 flags; /**< Segment flags */
+ u8 n_slices; /**< Number of slices */
+};
+
+#endif /* SRC_SVM_FIFO_TYPES_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff