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authorFlorin Coras <fcoras@cisco.com>2019-04-19 15:56:00 -0700
committerDamjan Marion <dmarion@me.com>2019-04-24 11:31:55 +0000
commit4375fa312e91ffeef0d34ab0594bda4a8c9189ea (patch)
treeabd9fce225e8bd351f53d36d446fe61ec107dbc2 /src/svm/svm_fifo.h
parentd35d4232953aa32a27a5a1024377191360441416 (diff)
svm: fifo ooo reads/writes with multiple chunks
Change-Id: If23a04623a7138c9f6c98ee9ecfa587396618a60 Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/svm/svm_fifo.h')
-rw-r--r--src/svm/svm_fifo.h25
1 files changed, 19 insertions, 6 deletions
diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index 82d2b391ab6..619d6093429 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -23,6 +23,7 @@
#include <vppinfra/vec.h>
#include <vppinfra/pool.h>
#include <vppinfra/format.h>
+#include <vppinfra/rbtree.h>
/** Out-of-order segment */
typedef struct
@@ -38,7 +39,7 @@ typedef struct
#define OOO_SEGMENT_INVALID_INDEX ((u32)~0)
#define SVM_FIFO_INVALID_SESSION_INDEX ((u32)~0)
#define SVM_FIFO_INVALID_INDEX ((u32)~0)
-#define SVM_FIFO_MAX_EVT_SUBSCRIBERS 8
+#define SVM_FIFO_MAX_EVT_SUBSCRIBERS 7
enum svm_fifo_tx_ntf_
{
@@ -65,6 +66,7 @@ typedef struct svm_fifo_chunk_
typedef enum svm_fifo_flag_
{
SVM_FIFO_F_SIZE_UPDATE = 1 << 0,
+ SVM_FIFO_F_MULTI_CHUNK = 1 << 1,
} svm_fifo_flag_t;
typedef struct _svm_fifo
@@ -76,6 +78,7 @@ typedef struct _svm_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 */
svm_fifo_chunk_t *new_chunks; /**< chunks yet to be added to list */
+ rb_tree_t chunk_lookup;
CLIB_CACHE_LINE_ALIGN_MARK (shared_second);
volatile u32 has_event; /**< non-zero if deq event exists */
@@ -93,17 +96,18 @@ typedef struct _svm_fifo
struct _svm_fifo *prev; /**< prev in active chain */
CLIB_CACHE_LINE_ALIGN_MARK (consumer);
- u32 head;
+ u32 head; /**< fifo head position/byte */
svm_fifo_chunk_t *head_chunk; /**< tracks chunk where head lands */
+ svm_fifo_chunk_t *ooo_deq; /**< last chunk used for ooo dequeue */
volatile u32 want_tx_ntf; /**< producer wants nudge */
volatile u32 has_tx_ntf;
CLIB_CACHE_LINE_ALIGN_MARK (producer);
- u32 tail;
+ 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_list_head; /**< Head of out-of-order linked-list */
u32 ooos_newest; /**< Last segment to have been updated */
volatile u8 n_subscribers;
u8 subscribers[SVM_FIFO_MAX_EVT_SUBSCRIBERS];
@@ -327,6 +331,15 @@ svm_fifo_unset_event (svm_fifo_t * f)
svm_fifo_t *svm_fifo_create (u32 data_size_in_bytes);
void svm_fifo_init (svm_fifo_t * f, u32 size);
+/**
+ * Grow fifo size by adding chunk to chunk list
+ *
+ * If fifos are allocated on a segment, this should be called with
+ * the segment's heap pushed.
+ *
+ * @param f fifo to be extended
+ * @param c chunk or linked list of chunks to be added
+ */
void svm_fifo_add_chunk (svm_fifo_t * f, svm_fifo_chunk_t * c);
void svm_fifo_free (svm_fifo_t * f);
@@ -341,7 +354,7 @@ int svm_fifo_dequeue_drop (svm_fifo_t * f, u32 max_bytes);
void svm_fifo_dequeue_drop_all (svm_fifo_t * f);
int svm_fifo_segments (svm_fifo_t * f, svm_fifo_segment_t * fs);
void svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_segment_t * fs);
-void svm_fifo_init_pointers (svm_fifo_t * f, u32 pointer);
+void svm_fifo_init_pointers (svm_fifo_t * f, u32 head, u32 tail);
void svm_fifo_clone (svm_fifo_t * df, svm_fifo_t * sf);
void svm_fifo_overwrite_head (svm_fifo_t * f, u8 * data, u32 len);
void svm_fifo_add_subscriber (svm_fifo_t * f, u8 subscriber);