X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fsegment_manager.h;h=8358c50ba06d7ed80650f8caf77a1a4f1a7b2504;hb=refs%2Fchanges%2F37%2F19337%2F3;hp=15fd067053f521eaed1de8a3f91e29f9dd7ba3c2;hpb=288eaab5964b9211350acad8d742fae4789577fe;p=vpp.git diff --git a/src/vnet/session/segment_manager.h b/src/vnet/session/segment_manager.h index 15fd067053f..8358c50ba06 100644 --- a/src/vnet/session/segment_manager.h +++ b/src/vnet/session/segment_manager.h @@ -15,14 +15,12 @@ #ifndef SRC_VNET_SESSION_SEGMENT_MANAGER_H_ #define SRC_VNET_SESSION_SEGMENT_MANAGER_H_ -#include -#include #include -#include #include #include +#include -typedef struct _segment_manager_properties +typedef struct _segment_manager_props { u32 rx_fifo_size; /**< receive fifo size */ u32 tx_fifo_size; /**< transmit fifo size */ @@ -35,12 +33,12 @@ typedef struct _segment_manager_properties u8 reserved:6; /**< reserved flags */ ssvm_segment_type_t segment_type; /**< seg type: if set to SSVM_N_TYPES, private segments are used */ -} segment_manager_properties_t; +} segment_manager_props_t; typedef struct _segment_manager { /** Pool of segments allocated by this manager */ - svm_fifo_segment_private_t *segments; + fifo_segment_t *segments; /** rwlock that protects the segments pool */ clib_rwlock_t segments_rwlock; @@ -61,25 +59,6 @@ typedef struct _segment_manager svm_msg_q_t *event_queue; } segment_manager_t; -#define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \ -do { \ - clib_rwlock_reader_lock (&(SM)->segments_rwlock); \ - pool_foreach((VAR), ((SM)->segments), (BODY)); \ - clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \ -} while (0) - -typedef struct segment_manager_main_ -{ - /** Pool of segment managers */ - segment_manager_t *segment_managers; - - /** Virtual address allocator */ - clib_valloc_main_t va_allocator; - -} segment_manager_main_t; - -extern segment_manager_main_t segment_manager_main; - typedef struct segment_manager_main_init_args_ { u64 baseva; @@ -88,87 +67,123 @@ typedef struct segment_manager_main_init_args_ #define SEGMENT_MANAGER_INVALID_APP_INDEX ((u32) ~0) -/** Pool of segment managers */ -extern segment_manager_t *segment_managers; - -always_inline segment_manager_t * -segment_manager_get (u32 index) -{ - return pool_elt_at_index (segment_manager_main.segment_managers, index); -} - -always_inline segment_manager_t * -segment_manager_get_if_valid (u32 index) -{ - if (pool_is_free_index (segment_manager_main.segment_managers, index)) - return 0; - return pool_elt_at_index (segment_manager_main.segment_managers, index); -} - -always_inline u32 -segment_manager_index (segment_manager_t * sm) -{ - return sm - segment_manager_main.segment_managers; -} - -always_inline svm_msg_q_t * -segment_manager_event_queue (segment_manager_t * sm) -{ - return sm->event_queue; -} - -always_inline u64 -segment_manager_make_segment_handle (u32 segment_manager_index, - u32 segment_index) -{ - return (((u64) segment_manager_index << 32) | segment_index); -} - -u64 segment_manager_segment_handle (segment_manager_t * sm, - svm_fifo_segment_private_t * segment); - -segment_manager_t *segment_manager_new (); +segment_manager_t *segment_manager_alloc (void); int segment_manager_init (segment_manager_t * sm, u32 first_seg_size, u32 prealloc_fifo_pairs); -svm_fifo_segment_private_t *segment_manager_get_segment (segment_manager_t *, - u32 segment_index); -svm_fifo_segment_private_t *segment_manager_get_segment_w_handle (u64); -svm_fifo_segment_private_t - * segment_manager_get_segment_w_lock (segment_manager_t * sm, - u32 segment_index); +/** + * Cleanup segment manager + * + * @param sm segment manager to be freed + */ +void segment_manager_free (segment_manager_t * sm); + +/** + * Initiate segment manager cleanup + * + * @param sm segment manager to be freed + */ +void segment_manager_init_free (segment_manager_t * sm); +segment_manager_t *segment_manager_get (u32 index); +segment_manager_t *segment_manager_get_if_valid (u32 index); +u32 segment_manager_index (segment_manager_t * sm); + int segment_manager_add_segment (segment_manager_t * sm, u32 segment_size); void segment_manager_del_segment (segment_manager_t * sm, - svm_fifo_segment_private_t * fs); + fifo_segment_t * fs); +fifo_segment_t *segment_manager_get_segment (segment_manager_t * sm, + u32 segment_index); +fifo_segment_t *segment_manager_get_segment_w_handle (u64 sh); +fifo_segment_t *segment_manager_get_segment_w_lock (segment_manager_t * sm, + u32 segment_index); +int segment_manager_add_first_segment (segment_manager_t * sm, + u32 segment_size); +u64 segment_manager_make_segment_handle (u32 segment_manager_index, + u32 segment_index); +u64 segment_manager_segment_handle (segment_manager_t * sm, + fifo_segment_t * segment); void segment_manager_segment_reader_unlock (segment_manager_t * sm); void segment_manager_segment_writer_unlock (segment_manager_t * sm); -int segment_manager_add_first_segment (segment_manager_t * sm, - u32 segment_size); -void segment_manager_del_sessions (segment_manager_t * sm); -void segment_manager_del (segment_manager_t * sm); -void segment_manager_init_del (segment_manager_t * sm); -u8 segment_manager_has_fifos (segment_manager_t * sm); int segment_manager_alloc_session_fifos (segment_manager_t * sm, - svm_fifo_t ** server_rx_fifo, - svm_fifo_t ** server_tx_fifo, - u32 * fifo_segment_index); -int segment_manager_try_alloc_fifos (svm_fifo_segment_private_t * fs, + svm_fifo_t ** rx_fifo, + svm_fifo_t ** tx_fifo); +int segment_manager_try_alloc_fifos (fifo_segment_t * fs, u32 rx_fifo_size, u32 tx_fifo_size, svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo); -void segment_manager_dealloc_fifos (u32 segment_index, svm_fifo_t * rx_fifo, +void segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo); -u32 segment_manager_evt_q_expected_size (u32 q_size); -svm_msg_q_t *segment_manager_alloc_queue (svm_fifo_segment_private_t * fs, - segment_manager_properties_t * - props); + +/** + * Grows fifo owned by segment manager + * + * @param sm segment manager that owns the fifo + * @param f fifo to be grown + * @param size amount of bytes to add to fifo + * @return 0 on success, negative number otherwise + */ +int segment_manager_grow_fifo (segment_manager_t * sm, svm_fifo_t * f, + u32 size); + +/** + * Request to shrink fifo owned by segment manager + * + * If this is not called by the producer, no attempt is made to reduce the + * size until the producer tries to enqueue more data. To collect the chunks + * that are to be removed call @ref segment_manager_collect_fifo_chunks + * + * Size reduction does not affect fifo chunk boundaries. Therefore chunks are + * not split and the amount of bytes to be removed can be equal to or less + * than what was requested. + * + * @param sm segment manager that owns the fifo + * @param f fifo to be shrunk + * @param size amount of bytes to remove from fifo + * @param is_producer flag that indicates is caller is the producer for the + * fifo. + * @return actual number of bytes to be removed + */ +int segment_manager_shrink_fifo (segment_manager_t * sm, svm_fifo_t * f, + u32 size, u8 is_producer); + +/** + * Collect fifo chunks that are no longer used + * + * This should not be called unless SVM_FIFO_F_COLLECT_CHUNKS is set for + * the fifo. The chunks are returned to the fifo segment freelist. + * + * @param sm segment manager that owns the fifo + * @param f fifo whose chunks are to be collected + * @return 0 on success, error otherwise + */ +int segment_manager_collect_fifo_chunks (segment_manager_t * sm, + svm_fifo_t * f); +u8 segment_manager_has_fifos (segment_manager_t * sm); + +svm_msg_q_t *segment_manager_alloc_queue (fifo_segment_t * fs, + segment_manager_props_t * props); void segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q); +svm_msg_q_t *segment_manager_event_queue (segment_manager_t * sm); +u32 segment_manager_evt_q_expected_size (u32 q_size); + void segment_manager_app_detach (segment_manager_t * sm); +/** + * Cleanup segment manager sessions + * + * Initiates disconnects for all sessions 'owned' by a segment manager by + * leveraging the backpointers that fifos keep. + * + * @param sm segment manager whose sessions are to be disconnected + */ +void segment_manager_del_sessions (segment_manager_t * sm); +void segment_manager_format_sessions (segment_manager_t * sm, int verbose); + void segment_manager_main_init (segment_manager_main_init_args_t * a); -segment_manager_properties_t - * segment_manager_properties_init (segment_manager_properties_t * sm); + +segment_manager_props_t *segment_manager_props_init (segment_manager_props_t * + sm); #endif /* SRC_VNET_SESSION_SEGMENT_MANAGER_H_ */ /*