#define __included_fifo_segment_h__
#include <svm/ssvm.h>
+#include <svm/fifo_types.h>
+#include <svm/message_queue.h>
#include <svm/svm_fifo.h>
typedef enum
#define FIFO_SEGMENT_MIN_LOG2_FIFO_SIZE 12 /**< 4kB min fifo size */
#define FIFO_SEGMENT_MIN_FIFO_SIZE 4096 /**< 4kB min fifo size */
-#define FIFO_SEGMENT_MAX_FIFO_SIZE (2 << 30) /**< 2GB max fifo size */
+#define FIFO_SEGMENT_MAX_FIFO_SIZE (2ULL << 30) /**< 2GB max fifo size */
#define FIFO_SEGMENT_ALLOC_BATCH_SIZE 32 /* Allocation quantum */
typedef enum fifo_segment_flags_
{
FIFO_SEGMENT_F_IS_PREALLOCATED = 1 << 0,
FIFO_SEGMENT_F_WILL_DELETE = 1 << 1,
+ FIFO_SEGMENT_F_MEM_LIMIT = 1 << 2,
+ FIFO_SEGMENT_F_CUSTOM_USE = 1 << 3,
} fifo_segment_flags_t;
-typedef struct fifo_segment_slice_
+#define foreach_segment_mem_status \
+_(NO_PRESSURE, "No pressure") \
+_(LOW_PRESSURE, "Low pressure") \
+_(HIGH_PRESSURE, "High pressure") \
+_(NO_MEMORY, "No memory")
+
+typedef enum
{
- 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 */
-} fifo_segment_slice_t;
+#define _(sym,str) MEMORY_PRESSURE_##sym,
+ foreach_segment_mem_status
+#undef _
+ MEMORY_N_PRESSURE,
+} fifo_segment_mem_status_t;
-typedef struct
+#if 0
+typedef enum fifo_segment_mem_status_
{
- 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 max_log2_chunk_size; /**< Max log2(chunk size) for fs */
- u8 flags; /**< Segment flags */
- u8 n_slices; /**< Number of slices */
-} fifo_segment_header_t;
+ MEMORY_PRESSURE_NO_PRESSURE,
+ MEMORY_PRESSURE_LOW_PRESSURE,
+ MEMORY_PRESSURE_HIGH_PRESSURE,
+ MEMORY_PRESSURE_NO_MEMORY,
+} fifo_segment_mem_status_t;
+#endif
typedef struct
{
ssvm_private_t ssvm; /**< ssvm segment data */
fifo_segment_header_t *h; /**< fifo segment data */
+ uword max_byte_index;
u8 n_slices; /**< number of fifo segment slices */
+ fifo_slice_private_t *slices; /**< private slice information */
+ svm_msg_q_t *mqs; /**< private vec of attached mqs */
} fifo_segment_t;
typedef struct
int fifo_segment_attach (fifo_segment_main_t * sm,
fifo_segment_create_args_t * a);
void fifo_segment_delete (fifo_segment_main_t * sm, fifo_segment_t * fs);
+void fifo_segment_cleanup (fifo_segment_t *fs);
fifo_segment_t *fifo_segment_get_segment (fifo_segment_main_t * sm,
u32 fs_index);
+fifo_segment_t *fifo_segment_get_segment_if_valid (fifo_segment_main_t *sm,
+ u32 segment_index);
u32 fifo_segment_index (fifo_segment_main_t * sm, fifo_segment_t * fs);
void fifo_segment_info (fifo_segment_t * seg, char **address, size_t * size);
+always_inline void *
+fifo_segment_ptr (fifo_segment_t *fs, uword offset)
+{
+ return (void *) ((u8 *) fs->h + offset);
+}
+
+always_inline uword
+fifo_segment_offset (fifo_segment_t *fs, void *p)
+{
+ return (uword) ((u8 *) p - (u8 *) fs->h);
+}
+
/**
* Allocate fifo in fifo segment
*
u32 slice_index,
u32 data_bytes,
fifo_segment_ftype_t ftype);
+svm_fifo_t *fifo_segment_alloc_fifo_w_offset (fifo_segment_t *fs,
+ uword offset);
+svm_fifo_t *fifo_segment_duplicate_fifo (fifo_segment_t *fs, svm_fifo_t *f);
/**
* Free fifo allocated in fifo segment
*/
void fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f);
+/**
+ * Free fifo allocated by external applications
+ *
+ * @params fs fifo segment for fifo
+ * @param f fifo to be freed
+ */
+void fifo_segment_free_client_fifo (fifo_segment_t *fs, svm_fifo_t *f);
+
+void fifo_segment_detach_fifo (fifo_segment_t *fs, svm_fifo_t **f);
+void fifo_segment_attach_fifo (fifo_segment_t *fs, svm_fifo_t **f,
+ u32 slice_index);
+uword fifo_segment_fifo_offset (svm_fifo_t *f);
+
+/**
+ * Allocate message queue on segment
+ *
+ * @param fs fifo segment for mq
+ * @param mq_index index in private mqs vector to use to attach
+ * @param cfg configuration for mq
+ * @return attached message queue
+ */
+svm_msg_q_t *fifo_segment_msg_q_alloc (fifo_segment_t *fs, u32 mq_index,
+ svm_msg_q_cfg_t *cfg);
+
+/**
+ * Attach message queue at fifo segment offset
+ *
+ * @param fs fifo segment for mq
+ * @param offset offset for shared mq on the segment
+ * @param mq_index index in private mqs vector to use to attach
+ * @return attached message queue
+ */
+svm_msg_q_t *fifo_segment_msg_q_attach (fifo_segment_t *fs, uword offset,
+ u32 mq_index);
+
+/**
+ * Discover mqs on mq only segment
+ *
+ * @param fs fifo segment for mq
+ * @param fds array of fds is mqs use eventfds
+ * @param n_fds number of fds
+ */
+void fifo_segment_msg_qs_discover (fifo_segment_t *fs, int *fds, u32 n_fds);
+
+/**
+ * Message queue offset on segment
+ *
+ * @param fs fifo segment for mq
+ * @param mq_index index of mq in private mqs vector
+ * @return offset of the shared mq the private mq is attached to
+ */
+uword fifo_segment_msg_q_offset (fifo_segment_t *fs, u32 mq_index);
+
/**
* Try to preallocate fifo headers
*
u32 rx_fifo_size,
u32 tx_fifo_size,
u32 * n_fifo_pairs);
+
/**
- * Grow fifo size by adding an additional chunk of memory
+ * Allocate chunks in fifo segment
*
- * @param fs fifo segment for fifo
- * @param f fifo to be grown
- * @param chunk_size number of bytes to be added to fifo
- * @return 0 on success or a negative number otherwise
+ * @param fsh fifo segment header
+ * @param slice_index slice where chunks should be alocated
+ * @param chunk_size chunk size needed
+ * @return chunk (or chunks) that cover at least chunk_size bytes
+ * on success, 0 on failure.
*/
-int fifo_segment_grow_fifo (fifo_segment_t * fs, svm_fifo_t * f,
- u32 chunk_size);
+svm_fifo_chunk_t *fsh_alloc_chunk (fifo_segment_header_t * fsh,
+ u32 slice_index, u32 chunk_size);
/**
- * Collect unused chunks for fifo
+ * Return chunks to fifo segment
*
- * @param fs fifo segment for fifo
- * @param f fifo whose chunks are to be collected
- * @return 0 on success, error otherwise
+ * @param fsh fifo segment header
+ * @param slice_index slice where chunks should be returned
+ * @param c pointer to first chunk in 0 terminated linked list
+ */
+void fsh_collect_chunks (fifo_segment_header_t * fsh, u32 slice_index,
+ svm_fifo_chunk_t * c);
+
+/**
+ * Fifo segment has reached mem limit
+ *
+ * @param fsh fifo segment header
+ * @return 1 (if reached) or 0 (otherwise)
+ */
+u8 fsh_has_reached_mem_limit (fifo_segment_header_t * fsh);
+
+/**
+ * Fifo segment reset mem limit flag
+ *
+ * @param fs fifo segment
*/
-int fifo_segment_collect_fifo_chunks (fifo_segment_t * fs, svm_fifo_t * f);
+void fsh_reset_mem_limit (fifo_segment_header_t * fsh);
+
+/**
+ * Fifo segment reset mem limit flag
+ *
+ * @param fs fifo segment
+ * @param size size requested
+ * @return pointer to memory allocated or 0
+ */
+void *fifo_segment_alloc (fifo_segment_t *fs, uword size);
+/**
+ * Fifo segment allocated size
+ *
+ * Returns fifo segment's allocated size
+ *
+ * @param fs fifo segment
+ * @return allocated size in bytes
+ */
+uword fifo_segment_size (fifo_segment_t * fs);
/**
* Fifo segment estimate of number of free bytes
uword fifo_segment_free_bytes (fifo_segment_t * fs);
/**
- * Update fifo segment free bytes estimate
+ * Fifo segment number of cached bytes
*
- * Forces fifo segment free bytes estimate synchronization with underlying
- * memory allocator.
+ * Returns fifo segment's number of cached bytes.
*
- * @param fs fifo segment
+ * @param fs fifo segment
+ * @return cached bytes
*/
-void fifo_segment_update_free_bytes (fifo_segment_t * fs);
+uword fifo_segment_cached_bytes (fifo_segment_t * fs);
+
+uword fifo_segment_available_bytes (fifo_segment_t * fs);
/**
* Number of bytes on chunk free lists
u32 slice_index);
u32 fifo_segment_num_fifos (fifo_segment_t * fs);
u32 fifo_segment_num_free_fifos (fifo_segment_t * fs);
+
+svm_fifo_chunk_t *fifo_segment_alloc_chunk_w_slice (fifo_segment_t *fs,
+ u32 slice_index,
+ u32 chunk_size);
+void fifo_segment_collect_chunk (fifo_segment_t *fs, u32 slice_index,
+ svm_fifo_chunk_t *c);
+uword fifo_segment_chunk_offset (fifo_segment_t *fs, svm_fifo_chunk_t *c);
+
/**
* Find number of free chunks of given size
*
*/
u32 fifo_segment_num_free_chunks (fifo_segment_t * fs, u32 size);
+u8 fifo_segment_get_mem_usage (fifo_segment_t * fs);
+fifo_segment_mem_status_t fifo_segment_determine_status
+ (fifo_segment_header_t * fsh, u8 usage);
+fifo_segment_mem_status_t fifo_segment_get_mem_status (fifo_segment_t * fs);
+
void fifo_segment_main_init (fifo_segment_main_t * sm, u64 baseva,
u32 timeout_in_seconds);
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