From b095a3cd221a142f7d2b4897b812b2781de05d29 Mon Sep 17 00:00:00 2001
From: Florin Coras <fcoras@cisco.com>
Date: Thu, 25 Apr 2019 12:58:46 -0700
Subject: svm: fifo segment support for chunk allocation

Change-Id: Ie96706b4d8bcb32d2d5f065bc765f95f4e9369e7
Signed-off-by: Florin Coras <fcoras@cisco.com>
---
 src/svm/svm_fifo.c | 40 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

(limited to 'src/svm/svm_fifo.c')

diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c
index eafe497eec1..c8fd263c094 100644
--- a/src/svm/svm_fifo.c
+++ b/src/svm/svm_fifo.c
@@ -298,7 +298,9 @@ svm_fifo_init (svm_fifo_t * f, u32 size)
   f->head_chunk = f->tail_chunk = f->ooo_enq = f->ooo_deq = f->start_chunk;
 }
 
-/** create an svm fifo, in the current heap. Fails vs blow up the process */
+/**
+ * Creates a fifo in the current heap. Fails vs blow up the process
+ */
 svm_fifo_t *
 svm_fifo_create (u32 data_size_in_bytes)
 {
@@ -317,6 +319,27 @@ svm_fifo_create (u32 data_size_in_bytes)
   return f;
 }
 
+/**
+ * Creates a fifo chunk in the current heap
+ */
+svm_fifo_chunk_t *
+svm_fifo_chunk_alloc (u32 size)
+{
+  svm_fifo_chunk_t *c;
+  u32 rounded_size;
+
+  /* round chunk size to the next highest power-of-two */
+  rounded_size = (1 << (max_log2 (size)));
+  c = clib_mem_alloc_aligned_or_null (sizeof (*c) + rounded_size,
+				      CLIB_CACHE_LINE_BYTES);
+  if (c == 0)
+    return 0;
+
+  clib_memset (c, 0, sizeof (*c));
+  c->length = rounded_size;
+  return c;
+}
+
 static inline void
 svm_fifo_size_update (svm_fifo_t * f, svm_fifo_chunk_t * c)
 {
@@ -461,6 +484,18 @@ svm_fifo_find_chunk (svm_fifo_t * f, u32 pos)
   return 0;
 }
 
+void
+svm_fifo_free_chunk_lookup (svm_fifo_t * f)
+{
+  rb_tree_free_nodes (&f->chunk_lookup);
+}
+
+void
+svm_fifo_free_ooo_data (svm_fifo_t * f)
+{
+  pool_free (f->ooo_segments);
+}
+
 void
 svm_fifo_free (svm_fifo_t * f)
 {
@@ -468,7 +503,8 @@ svm_fifo_free (svm_fifo_t * f)
 
   if (--f->refcnt == 0)
     {
-      pool_free (f->ooo_segments);
+      /* ooo data is not allocated on segment heap */
+      svm_fifo_free_chunk_lookup (f);
       clib_mem_free (f);
     }
 }
-- 
cgit 1.2.3-korg