session: optimize ct fifo segment allocations

[vpp.git] / src / svm / fifo_segment.h

diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index 39c9454..f76798f 100644 (file)
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -17,6 +17,7 @@
 
 #include <svm/ssvm.h>
 #include <svm/fifo_types.h>
+#include <svm/message_queue.h>
 #include <svm/svm_fifo.h>
 
 typedef enum
@@ -37,6 +38,7 @@ 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;
 
 #define foreach_segment_mem_status     \
@@ -69,6 +71,8 @@ typedef struct
   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
@@ -95,11 +99,26 @@ int fifo_segment_create (fifo_segment_main_t * sm,
 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
  *
@@ -112,6 +131,9 @@ svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs,
                                             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
@@ -121,9 +143,58 @@ svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs,
  */
 void fifo_segment_free_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,
+/**
+ * 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
@@ -260,6 +331,14 @@ svm_fifo_t *fifo_segment_get_slice_fifo_list (fifo_segment_t * fs,
                                              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
  *