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-rw-r--r--src/svm/fifo_segment.c73
-rw-r--r--src/svm/fifo_types.h31
-rw-r--r--src/svm/svm_fifo.c225
-rw-r--r--src/svm/svm_fifo.h57
4 files changed, 230 insertions, 156 deletions
diff --git a/src/svm/fifo_segment.c b/src/svm/fifo_segment.c
index 19fd0520666..008cca4f350 100644
--- a/src/svm/fifo_segment.c
+++ b/src/svm/fifo_segment.c
@@ -148,28 +148,30 @@ fss_chunk_fl_index_is_valid (fifo_segment_slice_t * fss, u32 fl_index)
}
static void
-fss_chunk_free_list_push (fifo_segment_slice_t * fss, u32 fl_index,
- svm_fifo_chunk_t * c)
+fss_chunk_free_list_push (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss, u32 fl_index,
+ svm_fifo_chunk_t *c)
{
fss_chunk_freelist_lock (fss);
c->next = fss->free_chunks[fl_index];
- fss->free_chunks[fl_index] = c;
+ fss->free_chunks[fl_index] = fs_chunk_sptr (fsh, c);
fss_chunk_freelist_unlock (fss);
}
static void
-fss_chunk_free_list_push_list (fifo_segment_slice_t * fss, u32 fl_index,
- svm_fifo_chunk_t * head,
- svm_fifo_chunk_t * tail)
+fss_chunk_free_list_push_list (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss, u32 fl_index,
+ svm_fifo_chunk_t *head, svm_fifo_chunk_t *tail)
{
fss_chunk_freelist_lock (fss);
tail->next = fss->free_chunks[fl_index];
- fss->free_chunks[fl_index] = head;
+ fss->free_chunks[fl_index] = fs_chunk_sptr (fsh, head);
fss_chunk_freelist_unlock (fss);
}
static svm_fifo_chunk_t *
-fss_chunk_free_list_pop (fifo_segment_slice_t * fss, u32 fl_index)
+fss_chunk_free_list_pop (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss,
+ u32 fl_index)
{
svm_fifo_chunk_t *c;
@@ -183,7 +185,7 @@ fss_chunk_free_list_pop (fifo_segment_slice_t * fss, u32 fl_index)
return 0;
}
- c = fss->free_chunks[fl_index];
+ c = fs_chunk_ptr (fsh, fss->free_chunks[fl_index]);
fss->free_chunks[fl_index] = c->next;
fss_chunk_freelist_unlock (fss);
@@ -435,10 +437,10 @@ fs_try_alloc_multi_chunk (fifo_segment_header_t * fsh,
while (req_bytes)
{
- c = fss_chunk_free_list_pop (fss, fl_index);
+ c = fss_chunk_free_list_pop (fsh, fss, fl_index);
if (c)
{
- c->next = first;
+ c->next = fs_chunk_sptr (fsh, first);
first = c;
n_alloc += fl_size;
req_bytes -= clib_min (fl_size, req_bytes);
@@ -453,8 +455,8 @@ fs_try_alloc_multi_chunk (fifo_segment_header_t * fsh,
while (c)
{
fl_index = fs_freelist_for_size (c->length);
- next = c->next;
- fss_chunk_free_list_push (fss, fl_index, c);
+ next = fs_chunk_ptr (fsh, c->next);
+ fss_chunk_free_list_push (fsh, fss, fl_index, c);
c = next;
}
n_alloc = 0;
@@ -464,7 +466,7 @@ fs_try_alloc_multi_chunk (fifo_segment_header_t * fsh,
fl_index = fs_freelist_for_size (data_bytes) + 1;
if (!fss_chunk_fl_index_is_valid (fss, fl_index))
return 0;
- first = fss_chunk_free_list_pop (fss, fl_index);
+ first = fss_chunk_free_list_pop (fsh, fss, fl_index);
if (first)
{
first->next = 0;
@@ -541,13 +543,13 @@ fsh_try_alloc_chunk_batch (fifo_segment_header_t * fsh,
{
c->start_byte = 0;
c->length = rounded_data_size;
- c->next = head;
+ c->next = fs_chunk_sptr (fsh, head);
head = c;
cmem += sizeof (*c) + rounded_data_size;
c = (svm_fifo_chunk_t *) cmem;
}
- fss_chunk_free_list_push_list (fss, fl_index, head, tail);
+ fss_chunk_free_list_push_list (fsh, fss, fl_index, head, tail);
fss->num_chunks[fl_index] += batch_size;
fss_fl_chunk_bytes_add (fss, total_chunk_bytes);
fsh_cached_bytes_add (fsh, total_chunk_bytes);
@@ -593,7 +595,7 @@ fsh_try_alloc_chunk (fifo_segment_header_t * fsh,
fl_index = fs_freelist_for_size (data_bytes);
free_list:
- c = fss_chunk_free_list_pop (fss, fl_index);
+ c = fss_chunk_free_list_pop (fsh, fss, fl_index);
if (c)
{
c->next = 0;
@@ -678,10 +680,10 @@ fs_try_alloc_fifo (fifo_segment_header_t *fsh, u32 slice_index, u32 data_bytes)
return 0;
}
- sf->start_chunk = c;
+ sf->start_chunk = fs_chunk_sptr (fsh, c);
while (c->next)
- c = c->next;
- sf->end_chunk = c;
+ c = fs_chunk_ptr (fsh, c->next);
+ sf->end_chunk = fs_chunk_sptr (fsh, c);
sf->size = data_bytes;
sf->slice_index = slice_index;
@@ -710,9 +712,9 @@ fsh_slice_collect_chunks (fifo_segment_header_t * fsh,
while (c)
{
CLIB_MEM_UNPOISON (c, sizeof (*c));
- next = c->next;
+ next = fs_chunk_ptr (fsh, c->next);
fl_index = fs_freelist_for_size (c->length);
- fss_chunk_free_list_push (fss, fl_index, c);
+ fss_chunk_free_list_push (fsh, fss, fl_index, c);
n_collect += fs_freelist_index_to_size (fl_index);
c = next;
}
@@ -842,7 +844,7 @@ fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f)
fss = fsh_slice_get (fsh, sf->slice_index);
/* Free fifo chunks */
- fsh_slice_collect_chunks (fsh, fss, sf->start_chunk);
+ fsh_slice_collect_chunks (fsh, fss, fs_chunk_ptr (fsh, f->shr->start_chunk));
sf->start_chunk = sf->end_chunk = 0;
sf->head_chunk = sf->tail_chunk = 0;
@@ -895,12 +897,12 @@ fifo_segment_detach_fifo (fifo_segment_t * fs, svm_fifo_t * f)
if (f->flags & SVM_FIFO_F_LL_TRACKED)
fss_fifo_del_active_list (fss, f);
- c = f->shr->start_chunk;
+ c = fs_chunk_ptr (fs->h, f->shr->start_chunk);
while (c)
{
fl_index = fs_freelist_for_size (c->length);
clib_atomic_fetch_sub_rel (&fss->num_chunks[fl_index], 1);
- c = c->next;
+ c = fs_chunk_ptr (fs->h, c->next);
}
}
@@ -918,12 +920,12 @@ fifo_segment_attach_fifo (fifo_segment_t * fs, svm_fifo_t * f,
if (f->flags & SVM_FIFO_F_LL_TRACKED)
fss_fifo_add_active_list (fss, f);
- c = f->shr->start_chunk;
+ c = fs_chunk_ptr (fs->h, f->shr->start_chunk);
while (c)
{
fl_index = fs_freelist_for_size (c->length);
clib_atomic_fetch_add_rel (&fss->num_chunks[fl_index], 1);
- c = c->next;
+ c = fs_chunk_ptr (fs->h, c->next);
}
}
@@ -1068,7 +1070,8 @@ fifo_segment_num_free_fifos (fifo_segment_t * fs)
}
static u32
-fs_slice_num_free_chunks (fifo_segment_slice_t * fss, u32 size)
+fs_slice_num_free_chunks (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss, u32 size)
{
u32 count = 0, rounded_size, fl_index;
svm_fifo_chunk_t *c;
@@ -1079,13 +1082,13 @@ fs_slice_num_free_chunks (fifo_segment_slice_t * fss, u32 size)
{
for (i = 0; i < FS_CHUNK_VEC_LEN; i++)
{
- c = fss->free_chunks[i];
+ c = fs_chunk_ptr (fsh, fss->free_chunks[i]);
if (c == 0)
continue;
while (c)
{
- c = c->next;
+ c = fs_chunk_ptr (fsh, c->next);
count++;
}
}
@@ -1098,13 +1101,13 @@ fs_slice_num_free_chunks (fifo_segment_slice_t * fss, u32 size)
if (fl_index >= FS_CHUNK_VEC_LEN)
return 0;
- c = fss->free_chunks[fl_index];
+ c = fs_chunk_ptr (fsh, fss->free_chunks[fl_index]);
if (c == 0)
return 0;
while (c)
{
- c = c->next;
+ c = fs_chunk_ptr (fsh, c->next);
count++;
}
return count;
@@ -1121,7 +1124,7 @@ fifo_segment_num_free_chunks (fifo_segment_t * fs, u32 size)
for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
{
fss = fsh_slice_get (fsh, slice_index);
- count += fs_slice_num_free_chunks (fss, size);
+ count += fs_slice_num_free_chunks (fsh, fss, size);
}
return count;
}
@@ -1328,13 +1331,13 @@ format_fifo_segment (u8 * s, va_list * args)
fss = fsh_slice_get (fsh, slice_index);
for (i = 0; i < FS_CHUNK_VEC_LEN; i++)
{
- c = fss->free_chunks[i];
+ c = fs_chunk_ptr (fsh, fss->free_chunks[i]);
if (c == 0 && fss->num_chunks[i] == 0)
continue;
count = 0;
while (c)
{
- c = c->next;
+ c = fs_chunk_ptr (fsh, c->next);
count++;
}
diff --git a/src/svm/fifo_types.h b/src/svm/fifo_types.h
index 434b2c38b4c..a65b3a8831a 100644
--- a/src/svm/fifo_types.h
+++ b/src/svm/fifo_types.h
@@ -33,16 +33,18 @@ STATIC_ASSERT ((FS_MAX_LOG2_CHUNK_SZ - FS_MIN_LOG2_CHUNK_SZ) ==
#define SVM_FIFO_MAX_EVT_SUBSCRIBERS 7
typedef struct fifo_segment_header_ fifo_segment_header_t;
+typedef struct svm_fifo_chunk_ svm_fifo_chunk_t;
+typedef svm_fifo_chunk_t *svm_fifo_chunk_ptr_t;
-typedef struct svm_fifo_chunk_
+struct svm_fifo_chunk_
{
u32 start_byte; /**< chunk start byte */
u32 length; /**< length of chunk in bytes */
- struct svm_fifo_chunk_ *next; /**< pointer to next chunk in linked-lists */
+ svm_fifo_chunk_ptr_t next; /**< pointer to next chunk in linked-lists */
rb_node_index_t enq_rb_index; /**< enq node index if chunk in rbtree */
rb_node_index_t deq_rb_index; /**< deq node index if chunk in rbtree */
u8 data[0]; /**< start of chunk data */
-} svm_fifo_chunk_t;
+};
typedef struct
{
@@ -62,8 +64,8 @@ typedef struct
typedef struct svm_fifo_shr_
{
CLIB_CACHE_LINE_ALIGN_MARK (shared);
- 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_ptr_t start_chunk; /**< first chunk in fifo chunk list */
+ svm_fifo_chunk_ptr_t end_chunk; /**< end chunk in fifo chunk list */
volatile u32 has_event; /**< non-zero if deq event exists */
u32 min_alloc; /**< min chunk alloc if space available */
u32 size; /**< size of the fifo in bytes */
@@ -73,14 +75,14 @@ typedef struct svm_fifo_shr_
struct svm_fifo_shr_ *next; /**< next in freelist/active chain */
CLIB_CACHE_LINE_ALIGN_MARK (consumer);
- svm_fifo_chunk_t *head_chunk; /**< tracks chunk where head lands */
+ svm_fifo_chunk_ptr_t head_chunk; /**< tracks chunk where head lands */
u32 head; /**< fifo head position/byte */
volatile u32 want_deq_ntf; /**< producer wants nudge */
volatile u32 has_deq_ntf;
CLIB_CACHE_LINE_ALIGN_MARK (producer);
u32 tail; /**< fifo tail position/byte */
- svm_fifo_chunk_t *tail_chunk; /**< tracks chunk where tail lands */
+ svm_fifo_chunk_ptr_t tail_chunk; /**< tracks chunk where tail lands */
volatile u8 n_subscribers; /**< Number of subscribers for io events */
u8 subscribers[SVM_FIFO_MAX_EVT_SUBSCRIBERS];
} svm_fifo_shared_t;
@@ -115,7 +117,8 @@ typedef struct _svm_fifo
typedef struct fifo_segment_slice_
{
- svm_fifo_chunk_t *free_chunks[FS_CHUNK_VEC_LEN]; /**< Free chunks by size */
+ svm_fifo_chunk_ptr_t
+ free_chunks[FS_CHUNK_VEC_LEN]; /**< Free chunks by size */
svm_fifo_t *fifos; /**< Linked list of active RX fifos */
svm_fifo_shared_t *free_fifos; /**< Freelists of fifo shared hdrs */
uword n_fl_chunk_bytes; /**< Chunk bytes on freelist */
@@ -153,6 +156,18 @@ struct fifo_segment_header_
void fsh_virtual_mem_update (fifo_segment_header_t * fsh, u32 slice_index,
int n_bytes);
+always_inline svm_fifo_chunk_t *
+fs_chunk_ptr (fifo_segment_header_t *fsh, svm_fifo_chunk_ptr_t cp)
+{
+ return cp ? (svm_fifo_chunk_t *) ((u8 *) fsh + pointer_to_uword (cp)) : 0;
+}
+
+always_inline svm_fifo_chunk_ptr_t
+fs_chunk_sptr (fifo_segment_header_t *fsh, svm_fifo_chunk_t *c)
+{
+ return c ? (svm_fifo_chunk_ptr_t) ((u8 *) c - (u8 *) fsh) : 0;
+}
+
#endif /* SRC_SVM_FIFO_TYPES_H_ */
/*
diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c
index 2f910e0b95f..f79f37a4687 100644
--- a/src/svm/svm_fifo.c
+++ b/src/svm/svm_fifo.c
@@ -21,9 +21,11 @@
#include <svm/fifo_segment.h>
#include <vppinfra/cpu.h>
-CLIB_MARCH_FN (svm_fifo_copy_to_chunk, void, svm_fifo_t * f,
- svm_fifo_chunk_t * c, u32 tail_idx, const u8 * src, u32 len,
- svm_fifo_chunk_t ** last)
+#define F_INVALID_CPTR (svm_fifo_chunk_ptr_t) ~0ULL
+
+CLIB_MARCH_FN (svm_fifo_copy_to_chunk, void, svm_fifo_t *f,
+ svm_fifo_chunk_t *c, u32 tail_idx, const u8 *src, u32 len,
+ svm_fifo_chunk_ptr_t *last)
{
u32 n_chunk;
@@ -36,15 +38,15 @@ CLIB_MARCH_FN (svm_fifo_copy_to_chunk, void, svm_fifo_t * f,
{
u32 to_copy = len;
clib_memcpy_fast (&c->data[tail_idx], src, n_chunk);
- c = c->next;
+ c = f_cptr (f, c->next);
while ((to_copy -= n_chunk))
{
n_chunk = clib_min (c->length, to_copy);
clib_memcpy_fast (&c->data[0], src + (len - to_copy), n_chunk);
- c = c->length <= to_copy ? c->next : c;
+ c = c->length <= to_copy ? f_cptr (f, c->next) : c;
}
if (*last)
- *last = c;
+ *last = f_csptr (f, c);
}
else
{
@@ -52,9 +54,9 @@ CLIB_MARCH_FN (svm_fifo_copy_to_chunk, void, svm_fifo_t * f,
}
}
-CLIB_MARCH_FN (svm_fifo_copy_from_chunk, void, svm_fifo_t * f,
- svm_fifo_chunk_t * c, u32 head_idx, u8 * dst, u32 len,
- svm_fifo_chunk_t ** last)
+CLIB_MARCH_FN (svm_fifo_copy_from_chunk, void, svm_fifo_t *f,
+ svm_fifo_chunk_t *c, u32 head_idx, u8 *dst, u32 len,
+ svm_fifo_chunk_ptr_t *last)
{
u32 n_chunk;
@@ -67,17 +69,17 @@ CLIB_MARCH_FN (svm_fifo_copy_from_chunk, void, svm_fifo_t * f,
{
u32 to_copy = len;
clib_memcpy_fast (dst, &c->data[head_idx], n_chunk);
- c = c->next;
+ c = f_cptr (f, c->next);
while ((to_copy -= n_chunk))
{
CLIB_MEM_UNPOISON (c, sizeof (*c));
CLIB_MEM_UNPOISON (c->data, c->length);
n_chunk = clib_min (c->length, to_copy);
clib_memcpy_fast (dst + (len - to_copy), &c->data[0], n_chunk);
- c = c->length <= to_copy ? c->next : c;
+ c = c->length <= to_copy ? f_cptr (f, c->next) : c;
}
if (*last)
- *last = c;
+ *last = f_csptr (f, c);
}
else
{
@@ -88,16 +90,16 @@ CLIB_MARCH_FN (svm_fifo_copy_from_chunk, void, svm_fifo_t * f,
#ifndef CLIB_MARCH_VARIANT
static inline void
-svm_fifo_copy_to_chunk (svm_fifo_t * f, svm_fifo_chunk_t * c, u32 tail_idx,
- const u8 * src, u32 len, svm_fifo_chunk_t ** last)
+svm_fifo_copy_to_chunk (svm_fifo_t *f, svm_fifo_chunk_t *c, u32 tail_idx,
+ const u8 *src, u32 len, svm_fifo_chunk_ptr_t *last)
{
CLIB_MARCH_FN_SELECT (svm_fifo_copy_to_chunk) (f, c, tail_idx, src, len,
last);
}
static inline void
-svm_fifo_copy_from_chunk (svm_fifo_t * f, svm_fifo_chunk_t * c, u32 head_idx,
- u8 * dst, u32 len, svm_fifo_chunk_t ** last)
+svm_fifo_copy_from_chunk (svm_fifo_t *f, svm_fifo_chunk_t *c, u32 head_idx,
+ u8 *dst, u32 len, svm_fifo_chunk_ptr_t *last)
{
CLIB_MARCH_FN_SELECT (svm_fifo_copy_from_chunk) (f, c, head_idx, dst, len,
last);
@@ -387,17 +389,17 @@ svm_fifo_init (svm_fifo_t * f, u32 size)
/*
* Initialize chunks
*/
- f->shr->start_chunk->start_byte = 0;
- prev = f->shr->start_chunk;
+ prev = f_start_cptr (f);
+ prev->start_byte = 0;
prev->enq_rb_index = prev->deq_rb_index = RBTREE_TNIL_INDEX;
- c = prev->next;
+ c = f_cptr (f, prev->next);
while (c)
{
c->start_byte = prev->start_byte + prev->length;
c->enq_rb_index = c->deq_rb_index = RBTREE_TNIL_INDEX;
prev = c;
- c = c->next;
+ c = f_cptr (f, c->next);
}
}
@@ -447,7 +449,7 @@ svm_fifo_alloc (u32 data_size_in_bytes)
c->length = data_size_in_bytes;
c->enq_rb_index = RBTREE_TNIL_INDEX;
c->deq_rb_index = RBTREE_TNIL_INDEX;
- f->shr->start_chunk = f->shr->end_chunk = c;
+ f->shr->start_chunk = f->shr->end_chunk = f_csptr (f, c);
return f;
}
@@ -486,9 +488,9 @@ svm_fifo_find_chunk (svm_fifo_t * f, u32 pos)
{
svm_fifo_chunk_t *c;
- c = f->shr->start_chunk;
+ c = f_start_cptr (f);
while (c && !f_chunk_includes_pos (c, pos))
- c = c->next;
+ c = f_cptr (f, c->next);
return c;
}
@@ -502,7 +504,7 @@ svm_fifo_find_next_chunk (svm_fifo_t * f, svm_fifo_chunk_t * start, u32 pos)
c = start;
while (c && !f_chunk_includes_pos (c, pos))
- c = c->next;
+ c = f_cptr (f, c->next);
return c;
}
@@ -513,17 +515,16 @@ svm_fifo_max_read_chunk (svm_fifo_t * f)
u32 head, tail, end_chunk;
f_load_head_tail_cons (f, &head, &tail);
- ASSERT (!f->shr->head_chunk ||
- f_chunk_includes_pos (f->shr->head_chunk, head));
+ ASSERT (!f->shr->head_chunk || f_chunk_includes_pos (f_head_cptr (f), head));
if (!f->shr->head_chunk)
{
- f->shr->head_chunk = svm_fifo_find_chunk (f, head);
+ f->shr->head_chunk = f_csptr (f, svm_fifo_find_chunk (f, head));
if (PREDICT_FALSE (!f->shr->head_chunk))
return 0;
}
- end_chunk = f_chunk_end (f->shr->head_chunk);
+ end_chunk = f_chunk_end (f_head_cptr (f));
return f_pos_lt (end_chunk, tail) ? end_chunk - head : tail - head;
}
@@ -531,13 +532,15 @@ svm_fifo_max_read_chunk (svm_fifo_t * f)
u32
svm_fifo_max_write_chunk (svm_fifo_t * f)
{
+ svm_fifo_chunk_t *tail_chunk;
u32 head, tail;
f_load_head_tail_prod (f, &head, &tail);
- ASSERT (!f->shr->tail_chunk ||
- f_chunk_includes_pos (f->shr->tail_chunk, tail));
+ tail_chunk = f_tail_cptr (f);
+
+ ASSERT (!tail_chunk || f_chunk_includes_pos (tail_chunk, tail));
- return f->shr->tail_chunk ? f_chunk_end (f->shr->tail_chunk) - tail : 0;
+ return tail_chunk ? f_chunk_end (tail_chunk) - tail : 0;
}
static rb_node_t *
@@ -607,13 +610,13 @@ f_update_ooo_enq (svm_fifo_t * f, u32 start_pos, u32 end_pos)
/* Use linear search if rbtree is not initialized */
if (PREDICT_FALSE (!rb_tree_is_init (rt)))
{
- f->ooo_enq = svm_fifo_find_next_chunk (f, f->shr->tail_chunk, start_pos);
+ f->ooo_enq = svm_fifo_find_next_chunk (f, f_tail_cptr (f), start_pos);
return;
}
if (rt->root == RBTREE_TNIL_INDEX)
{
- c = f->shr->tail_chunk;
+ c = f_tail_cptr (f);
ASSERT (c->enq_rb_index == RBTREE_TNIL_INDEX);
c->enq_rb_index = rb_tree_add_custom (rt, c->start_byte,
pointer_to_uword (c), f_pos_lt);
@@ -633,7 +636,7 @@ f_update_ooo_enq (svm_fifo_t * f, u32 start_pos, u32 end_pos)
do
{
- c = c->next;
+ c = f_cptr (f, c->next);
if (!c || c->enq_rb_index != RBTREE_TNIL_INDEX)
break;
@@ -662,7 +665,7 @@ f_update_ooo_deq (svm_fifo_t * f, u32 start_pos, u32 end_pos)
if (rt->root == RBTREE_TNIL_INDEX)
{
- c = f->shr->start_chunk;
+ c = f_start_cptr (f);
ASSERT (c->deq_rb_index == RBTREE_TNIL_INDEX);
c->deq_rb_index = rb_tree_add_custom (rt, c->start_byte,
pointer_to_uword (c), f_pos_lt);
@@ -682,7 +685,7 @@ f_update_ooo_deq (svm_fifo_t * f, u32 start_pos, u32 end_pos)
do
{
- c = c->next;
+ c = f_cptr (f, c->next);
if (!c || c->deq_rb_index != RBTREE_TNIL_INDEX)
break;
@@ -713,7 +716,7 @@ f_lookup_clear_enq_chunks (svm_fifo_t * f, svm_fifo_chunk_t * start,
c->enq_rb_index = RBTREE_TNIL_INDEX;
}
- c = c->next;
+ c = f_cptr (f, c->next);
}
/* No ooo segments left, so make sure the current chunk
@@ -747,7 +750,7 @@ f_lookup_clear_deq_chunks (svm_fifo_t * f, svm_fifo_chunk_t * start,
c->deq_rb_index = RBTREE_TNIL_INDEX;
}
- c = c->next;
+ c = f_cptr (f, c->next);
}
return c;
@@ -785,18 +788,19 @@ svm_fifo_overwrite_head (svm_fifo_t * f, u8 * src, u32 len)
f_load_head_tail_cons (f, &head, &tail);
if (!f->shr->head_chunk)
- f->shr->head_chunk = svm_fifo_find_chunk (f, head);
+ f->shr->head_chunk = f_csptr (f, svm_fifo_find_chunk (f, head));
- c = f->shr->head_chunk;
+ c = f_head_cptr (f);
head_idx = head - c->start_byte;
n_chunk = c->length - head_idx;
if (len <= n_chunk)
clib_memcpy_fast (&c->data[head_idx], src, len);
else
{
- ASSERT (len - n_chunk <= c->next->length);
+ ASSERT (len - n_chunk <= f_cptr (f, c->next)->length);
clib_memcpy_fast (&c->data[head_idx], src, n_chunk);
- clib_memcpy_fast (&c->next->data[0], src + n_chunk, len - n_chunk);
+ clib_memcpy_fast (&f_cptr (f, c->next)->data[0], src + n_chunk,
+ len - n_chunk);
}
}
@@ -806,7 +810,8 @@ f_try_chunk_alloc (svm_fifo_t * f, u32 head, u32 tail, u32 len)
svm_fifo_chunk_t *c, *cur, *prev;
u32 alloc_size, free_alloced;
- free_alloced = f_chunk_end (f->shr->end_chunk) - tail;
+ prev = f_end_cptr (f);
+ free_alloced = f_chunk_end (prev) - tail;
alloc_size = clib_min (f->shr->min_alloc, f->shr->size - (tail - head));
alloc_size = clib_max (alloc_size, len - free_alloced);
@@ -816,7 +821,6 @@ f_try_chunk_alloc (svm_fifo_t * f, u32 head, u32 tail, u32 len)
return -1;
cur = c;
- prev = f->shr->end_chunk;
while (cur)
{
@@ -825,15 +829,15 @@ f_try_chunk_alloc (svm_fifo_t * f, u32 head, u32 tail, u32 len)
cur->deq_rb_index = RBTREE_TNIL_INDEX;
prev = cur;
- cur = cur->next;
+ cur = f_cptr (f, cur->next);
}
+ f_csptr_link (f, f->shr->end_chunk, c);
prev->next = 0;
- f->shr->end_chunk->next = c;
- f->shr->end_chunk = prev;
+ f->shr->end_chunk = f_csptr (f, prev);
if (!f->shr->tail_chunk)
- f->shr->tail_chunk = c;
+ f->shr->tail_chunk = f_csptr (f, c);
return 0;
}
@@ -857,20 +861,19 @@ svm_fifo_enqueue (svm_fifo_t * f, u32 len, const u8 * src)
/* number of bytes we're going to copy */
len = clib_min (free_count, len);
- if (f_pos_gt (tail + len, f_chunk_end (f->shr->end_chunk)))
+ if (f_pos_gt (tail + len, f_chunk_end (f_end_cptr (f))))
{
if (PREDICT_FALSE (f_try_chunk_alloc (f, head, tail, len)))
{
- len = f_chunk_end (f->shr->end_chunk) - tail;
+ len = f_chunk_end (f_end_cptr (f)) - tail;
if (!len)
return SVM_FIFO_EGROW;
}
}
- old_tail_c = f->shr->tail_chunk;
+ old_tail_c = f_tail_cptr (f);
- svm_fifo_copy_to_chunk (f, f->shr->tail_chunk, tail, src, len,
- &f->shr->tail_chunk);
+ svm_fifo_copy_to_chunk (f, old_tail_c, tail, src, len, &f->shr->tail_chunk);
tail = tail + len;
svm_fifo_trace_add (f, head, len, 2);
@@ -880,7 +883,8 @@ svm_fifo_enqueue (svm_fifo_t * f, u32 len, const u8 * src)
{
len += ooo_segment_try_collect (f, len, &tail);
/* Tail chunk might've changed even if nothing was collected */
- f->shr->tail_chunk = f_lookup_clear_enq_chunks (f, old_tail_c, tail);
+ f->shr->tail_chunk =
+ f_csptr (f, f_lookup_clear_enq_chunks (f, old_tail_c, tail));
f->ooo_enq = 0;
}
@@ -901,6 +905,7 @@ int
svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset, u32 len, u8 * src)
{
u32 tail, head, free_count, enq_pos;
+ svm_fifo_chunk_ptr_t last = F_INVALID_CPTR;
f_load_head_tail_prod (f, &head, &tail);
@@ -914,7 +919,7 @@ svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset, u32 len, u8 * src)
enq_pos = tail + offset;
- if (f_pos_gt (enq_pos + len, f_chunk_end (f->shr->end_chunk)))
+ if (f_pos_gt (enq_pos + len, f_chunk_end (f_end_cptr (f))))
{
if (PREDICT_FALSE (f_try_chunk_alloc (f, head, tail, offset + len)))
return SVM_FIFO_EGROW;
@@ -926,7 +931,9 @@ svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset, u32 len, u8 * src)
if (!f->ooo_enq || !f_chunk_includes_pos (f->ooo_enq, enq_pos))
f_update_ooo_enq (f, enq_pos, enq_pos + len);
- svm_fifo_copy_to_chunk (f, f->ooo_enq, enq_pos, src, len, &f->ooo_enq);
+ svm_fifo_copy_to_chunk (f, f->ooo_enq, enq_pos, src, len, &last);
+ if (last != F_INVALID_CPTR)
+ f->ooo_enq = f_cptr (f, last);
return 0;
}
@@ -947,13 +954,13 @@ svm_fifo_enqueue_nocopy (svm_fifo_t * f, u32 len)
if (rb_tree_is_init (&f->ooo_enq_lookup))
{
f->shr->tail_chunk =
- f_lookup_clear_enq_chunks (f, f->shr->tail_chunk, tail);
+ f_csptr (f, f_lookup_clear_enq_chunks (f, f_tail_cptr (f), tail));
f->ooo_enq = 0;
}
else
{
f->shr->tail_chunk =
- svm_fifo_find_next_chunk (f, f->shr->tail_chunk, tail);
+ f_csptr (f, svm_fifo_find_next_chunk (f, f_tail_cptr (f), tail));
}
/* store-rel: producer owned index (paired with load-acq in consumer) */
@@ -980,14 +987,14 @@ svm_fifo_enqueue_segments (svm_fifo_t * f, const svm_fifo_seg_t segs[],
for (i = 0; i < n_segs; i++)
len += segs[i].len;
- old_tail_c = f->shr->tail_chunk;
+ old_tail_c = f_tail_cptr (f);
if (!allow_partial)
{
if (PREDICT_FALSE (free_count < len))
return SVM_FIFO_EFULL;
- if (f_pos_gt (tail + len, f_chunk_end (f->shr->end_chunk)))
+ if (f_pos_gt (tail + len, f_chunk_end (f_end_cptr (f))))
{
if (PREDICT_FALSE (f_try_chunk_alloc (f, head, tail, len)))
return SVM_FIFO_EGROW;
@@ -995,7 +1002,7 @@ svm_fifo_enqueue_segments (svm_fifo_t * f, const svm_fifo_seg_t segs[],
for (i = 0; i < n_segs; i++)
{
- svm_fifo_copy_to_chunk (f, f->shr->tail_chunk, tail, segs[i].data,
+ svm_fifo_copy_to_chunk (f, f_tail_cptr (f), tail, segs[i].data,
segs[i].len, &f->shr->tail_chunk);
tail += segs[i].len;
}
@@ -1004,11 +1011,11 @@ svm_fifo_enqueue_segments (svm_fifo_t * f, const svm_fifo_seg_t segs[],
{
len = clib_min (free_count, len);
- if (f_pos_gt (tail + len, f_chunk_end (f->shr->end_chunk)))
+ if (f_pos_gt (tail + len, f_chunk_end (f_end_cptr (f))))
{
if (PREDICT_FALSE (f_try_chunk_alloc (f, head, tail, len)))
{
- len = f_chunk_end (f->shr->end_chunk) - tail;
+ len = f_chunk_end (f_end_cptr (f)) - tail;
if (!len)
return SVM_FIFO_EGROW;
}
@@ -1018,7 +1025,7 @@ svm_fifo_enqueue_segments (svm_fifo_t * f, const svm_fifo_seg_t segs[],
while (len)
{
u32 to_copy = clib_min (segs[i].len, len);
- svm_fifo_copy_to_chunk (f, f->shr->tail_chunk, tail, segs[i].data,
+ svm_fifo_copy_to_chunk (f, f_tail_cptr (f), tail, segs[i].data,
to_copy, &f->shr->tail_chunk);
len -= to_copy;
tail += to_copy;
@@ -1031,7 +1038,8 @@ svm_fifo_enqueue_segments (svm_fifo_t * f, const svm_fifo_seg_t segs[],
{
len += ooo_segment_try_collect (f, len, &tail);
/* Tail chunk might've changed even if nothing was collected */
- f->shr->tail_chunk = f_lookup_clear_enq_chunks (f, old_tail_c, tail);
+ f->shr->tail_chunk =
+ f_csptr (f, f_lookup_clear_enq_chunks (f, old_tail_c, tail));
f->ooo_enq = 0;
}
@@ -1048,12 +1056,11 @@ f_unlink_chunks (svm_fifo_t * f, u32 end_pos, u8 maybe_ooo)
rb_tree_t *rt;
rb_node_t *n;
- ASSERT (!f_chunk_includes_pos (f->shr->start_chunk, end_pos));
-
if (maybe_ooo)
rt = &f->ooo_deq_lookup;
- c = f->shr->start_chunk;
+ c = f_start_cptr (f);
+ ASSERT (!f_chunk_includes_pos (c, end_pos));
do
{
@@ -1067,7 +1074,7 @@ f_unlink_chunks (svm_fifo_t * f, u32 end_pos, u8 maybe_ooo)
if (!c->next)
break;
prev = c;
- c = c->next;
+ c = f_cptr (f, c->next);
}
while (!f_chunk_includes_pos (c, end_pos));
@@ -1087,8 +1094,8 @@ f_unlink_chunks (svm_fifo_t * f, u32 end_pos, u8 maybe_ooo)
return 0;
prev->next = 0;
- start = f->shr->start_chunk;
- f->shr->start_chunk = c;
+ start = f_start_cptr (f);
+ f->shr->start_chunk = f_csptr (f, c);
return start;
}
@@ -1109,9 +1116,9 @@ svm_fifo_dequeue (svm_fifo_t * f, u32 len, u8 * dst)
len = clib_min (cursize, len);
if (!f->shr->head_chunk)
- f->shr->head_chunk = svm_fifo_find_chunk (f, head);
+ f->shr->head_chunk = f_csptr (f, svm_fifo_find_chunk (f, head));
- svm_fifo_copy_from_chunk (f, f->shr->head_chunk, head, dst, len,
+ svm_fifo_copy_from_chunk (f, f_head_cptr (f), head, dst, len,
&f->shr->head_chunk);
head = head + len;
@@ -1119,7 +1126,7 @@ svm_fifo_dequeue (svm_fifo_t * f, u32 len, u8 * dst)
* Use svm_fifo_dequeue_drop instead. */
ASSERT (rb_tree_n_nodes (&f->ooo_deq_lookup) <= 1);
- if (f_pos_geq (head, f_chunk_end (f->shr->start_chunk)))
+ if (f_pos_geq (head, f_chunk_end (f_start_cptr (f))))
fsh_collect_chunks (f->fs_hdr, f->shr->slice_index,
f_unlink_chunks (f, head, 0));
@@ -1133,6 +1140,7 @@ int
svm_fifo_peek (svm_fifo_t * f, u32 offset, u32 len, u8 * dst)
{
u32 tail, head, cursize, head_idx;
+ svm_fifo_chunk_ptr_t last = F_INVALID_CPTR;
f_load_head_tail_cons (f, &head, &tail);
@@ -1149,7 +1157,9 @@ svm_fifo_peek (svm_fifo_t * f, u32 offset, u32 len, u8 * dst)
if (!f->ooo_deq || !f_chunk_includes_pos (f->ooo_deq, head_idx))
f_update_ooo_deq (f, head_idx, head_idx + len);
- svm_fifo_copy_from_chunk (f, f->ooo_deq, head_idx, dst, len, &f->ooo_deq);
+ svm_fifo_copy_from_chunk (f, f->ooo_deq, head_idx, dst, len, &last);
+ if (last != F_INVALID_CPTR)
+ f->ooo_deq = f_cptr (f, last);
return len;
}
@@ -1173,11 +1183,11 @@ svm_fifo_dequeue_drop (svm_fifo_t * f, u32 len)
/* move head */
head = head + total_drop_bytes;
- if (f_pos_geq (head, f_chunk_end (f->shr->start_chunk)))
+ if (f_pos_geq (head, f_chunk_end (f_start_cptr (f))))
{
fsh_collect_chunks (f->fs_hdr, f->shr->slice_index,
f_unlink_chunks (f, head, 1));
- f->shr->head_chunk = f_chunk_includes_pos (f->shr->start_chunk, head) ?
+ f->shr->head_chunk = f_chunk_includes_pos (f_start_cptr (f), head) ?
f->shr->start_chunk :
0;
}
@@ -1199,12 +1209,13 @@ svm_fifo_dequeue_drop_all (svm_fifo_t * f)
f_load_head_tail_all_acq (f, &head, &tail);
- if (!f->shr->head_chunk || !f_chunk_includes_pos (f->shr->head_chunk, head))
- f->shr->head_chunk = svm_fifo_find_chunk (f, head);
+ if (!f->shr->head_chunk || !f_chunk_includes_pos (f_head_cptr (f), head))
+ f->shr->head_chunk = f_csptr (f, svm_fifo_find_chunk (f, head));
- f->shr->head_chunk = f_lookup_clear_deq_chunks (f, f->shr->head_chunk, tail);
+ f->shr->head_chunk =
+ f_csptr (f, f_lookup_clear_deq_chunks (f, f_head_cptr (f), tail));
- if (f_pos_geq (tail, f_chunk_end (f->shr->start_chunk)))
+ if (f_pos_geq (tail, f_chunk_end (f_start_cptr (f))))
fsh_collect_chunks (f->fs_hdr, f->shr->slice_index,
f_unlink_chunks (f, tail, 0));
@@ -1219,7 +1230,7 @@ svm_fifo_fill_chunk_list (svm_fifo_t * f)
f_load_head_tail_prod (f, &head, &tail);
- if (f_chunk_end (f->shr->end_chunk) - head >= f->shr->size)
+ if (f_chunk_end (f_end_cptr (f)) - head >= f->shr->size)
return 0;
if (f_try_chunk_alloc (f, head, tail, f->shr->size - (tail - head)))
@@ -1240,12 +1251,12 @@ svm_fifo_provision_chunks (svm_fifo_t *f, svm_fifo_seg_t *fs, u32 n_segs,
if (f_free_count (f, head, tail) < len)
return SVM_FIFO_EFULL;
- n_avail = f_chunk_end (f->shr->end_chunk) - tail;
+ n_avail = f_chunk_end (f_end_cptr (f)) - tail;
if (n_avail < len && f_try_chunk_alloc (f, head, tail, len))
return SVM_FIFO_EGROW;
- c = f->shr->tail_chunk;
+ c = f_tail_cptr (f);
head_pos = (tail - c->start_byte);
fs[0].data = c->data + head_pos;
fs[0].len = clib_min (c->length - head_pos, len);
@@ -1253,7 +1264,7 @@ svm_fifo_provision_chunks (svm_fifo_t *f, svm_fifo_seg_t *fs, u32 n_segs,
while (n_bytes < len && fs_index < n_segs)
{
- c = c->next;
+ c = f_cptr (f, c->next);
clen = clib_min (c->length, len - n_bytes);
fs[fs_index].data = c->data;
fs[fs_index].len = clen;
@@ -1287,12 +1298,12 @@ svm_fifo_segments (svm_fifo_t * f, u32 offset, svm_fifo_seg_t * fs,
start = head + offset;
if (!f->shr->head_chunk)
- f->shr->head_chunk = svm_fifo_find_chunk (f, head);
+ f->shr->head_chunk = f_csptr (f, svm_fifo_find_chunk (f, head));
- c = f->shr->head_chunk;
+ c = f_head_cptr (f);
while (!f_chunk_includes_pos (c, start))
- c = c->next;
+ c = f_cptr (f, c->next);
head_pos = start - c->start_byte;
fs[0].data = c->data + head_pos;
@@ -1301,7 +1312,7 @@ svm_fifo_segments (svm_fifo_t * f, u32 offset, svm_fifo_seg_t * fs,
while (n_bytes < to_read && fs_index < n_segs)
{
- c = c->next;
+ c = f_cptr (f, c->next);
len = clib_min (c->length, to_read - n_bytes);
fs[fs_index].data = c->data;
fs[fs_index].len = len;
@@ -1327,7 +1338,7 @@ svm_fifo_clone (svm_fifo_t * df, svm_fifo_t * sf)
/* Support only single chunk clones for now */
ASSERT (svm_fifo_n_chunks (sf) == 1);
- clib_memcpy_fast (df->shr->head_chunk->data, sf->shr->head_chunk->data,
+ clib_memcpy_fast (f_head_cptr (df)->data, f_head_cptr (sf)->data,
sf->shr->size);
f_load_head_tail_all_acq (sf, &head, &tail);
@@ -1360,10 +1371,12 @@ svm_fifo_init_pointers (svm_fifo_t * f, u32 head, u32 tail)
c = svm_fifo_find_chunk (f, head);
ASSERT (c != 0);
- f->shr->head_chunk = f->ooo_deq = c;
+ f->ooo_deq = c;
+ f->shr->head_chunk = f_csptr (f, c);
c = svm_fifo_find_chunk (f, tail);
ASSERT (c != 0);
- f->shr->tail_chunk = f->ooo_enq = c;
+ f->ooo_enq = c;
+ f->shr->tail_chunk = f_csptr (f, c);
}
void
@@ -1395,19 +1408,18 @@ svm_fifo_is_sane (svm_fifo_t * f)
svm_fifo_chunk_t *tmp;
if (f->shr->head_chunk &&
- !f_chunk_includes_pos (f->shr->head_chunk, f->shr->head))
+ !f_chunk_includes_pos (f_head_cptr (f), f->shr->head))
return 0;
if (f->shr->tail_chunk &&
- !f_chunk_includes_pos (f->shr->tail_chunk, f->shr->tail))
+ !f_chunk_includes_pos (f_tail_cptr (f), f->shr->tail))
return 0;
if (f->ooo_deq)
{
if (rb_tree_is_init (&f->ooo_deq_lookup))
{
if (f_pos_lt (f->ooo_deq->start_byte,
- f->shr->start_chunk->start_byte) ||
- f_pos_gt (f->ooo_deq->start_byte,
- f_chunk_end (f->shr->end_chunk)))
+ f_start_cptr (f)->start_byte) ||
+ f_pos_gt (f->ooo_deq->start_byte, f_chunk_end (f_end_cptr (f))))
return 0;
tmp = f_find_chunk_rbtree (&f->ooo_deq_lookup,
@@ -1423,9 +1435,8 @@ svm_fifo_is_sane (svm_fifo_t * f)
if (rb_tree_is_init (&f->ooo_enq_lookup))
{
if (f_pos_lt (f->ooo_enq->start_byte,
- f->shr->start_chunk->start_byte) ||
- f_pos_gt (f->ooo_enq->start_byte,
- f_chunk_end (f->shr->end_chunk)))
+ f_start_cptr (f)->start_byte) ||
+ f_pos_gt (f->ooo_enq->start_byte, f_chunk_end (f_end_cptr (f))))
return 0;
tmp = f_find_chunk_rbtree (&f->ooo_enq_lookup,
@@ -1433,19 +1444,19 @@ svm_fifo_is_sane (svm_fifo_t * f)
}
else
{
- tmp = svm_fifo_find_next_chunk (f, f->shr->tail_chunk,
+ tmp = svm_fifo_find_next_chunk (f, f_tail_cptr (f),
f->ooo_enq->start_byte);
}
if (tmp != f->ooo_enq)
return 0;
}
- if (f->shr->start_chunk->next)
+ if (f_start_cptr (f)->next)
{
svm_fifo_chunk_t *c, *prev = 0, *tmp;
u32 chunks_bytes = 0;
- c = f->shr->start_chunk;
+ c = f_start_cptr (f);
do
{
tmp = svm_fifo_find_chunk (f, c->start_byte);
@@ -1475,7 +1486,7 @@ svm_fifo_is_sane (svm_fifo_t * f)
chunks_bytes += c->length;
prev = c;
- c = c->next;
+ c = f_cptr (f, c->next);
}
while (c);
@@ -1492,11 +1503,11 @@ svm_fifo_n_chunks (svm_fifo_t * f)
svm_fifo_chunk_t *c;
int n_chunks = 0;
- c = f->shr->start_chunk;
+ c = f_start_cptr (f);
while (c)
{
n_chunks++;
- c = c->next;
+ c = f_cptr (f, c->next);
}
return n_chunks;
@@ -1558,7 +1569,7 @@ svm_fifo_replay (u8 * s, svm_fifo_t * f, u8 no_read, u8 verbose)
placeholder_fifo = svm_fifo_alloc (f->shr->size);
svm_fifo_init (f, f->shr->size);
- clib_memset (f->shr->head_chunk->data, 0xFF, f->shr->size);
+ clib_memset (f_head_cptr (f)->data, 0xFF, f->shr->size);
vec_validate (data, f->shr->size);
for (i = 0; i < vec_len (data); i++)
data[i] = i;
diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index 5845d7042af..f5b60807c28 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -171,6 +171,48 @@ f_chunk_includes_pos (svm_fifo_chunk_t * c, u32 pos)
&& f_pos_lt (pos, c->start_byte + c->length));
}
+always_inline svm_fifo_chunk_t *
+f_start_cptr (svm_fifo_t *f)
+{
+ return fs_chunk_ptr (f->fs_hdr, f->shr->start_chunk);
+}
+
+always_inline svm_fifo_chunk_t *
+f_end_cptr (svm_fifo_t *f)
+{
+ return fs_chunk_ptr (f->fs_hdr, f->shr->end_chunk);
+}
+
+always_inline svm_fifo_chunk_t *
+f_head_cptr (svm_fifo_t *f)
+{
+ return fs_chunk_ptr (f->fs_hdr, f->shr->head_chunk);
+}
+
+always_inline svm_fifo_chunk_t *
+f_tail_cptr (svm_fifo_t *f)
+{
+ return fs_chunk_ptr (f->fs_hdr, f->shr->tail_chunk);
+}
+
+always_inline svm_fifo_chunk_t *
+f_cptr (svm_fifo_t *f, svm_fifo_chunk_ptr_t cp)
+{
+ return fs_chunk_ptr (f->fs_hdr, cp);
+}
+
+always_inline svm_fifo_chunk_ptr_t
+f_csptr (svm_fifo_t *f, svm_fifo_chunk_t *c)
+{
+ return fs_chunk_sptr (f->fs_hdr, c);
+}
+
+always_inline void
+f_csptr_link (svm_fifo_t *f, svm_fifo_chunk_ptr_t cp, svm_fifo_chunk_t *c)
+{
+ fs_chunk_ptr (f->fs_hdr, cp)->next = fs_chunk_sptr (f->fs_hdr, c);
+}
+
/**
* Create fifo of requested size
*
@@ -606,7 +648,7 @@ u32 svm_fifo_max_write_chunk (svm_fifo_t * f);
static inline svm_fifo_chunk_t *
svm_fifo_head_chunk (svm_fifo_t * f)
{
- return f->shr->head_chunk;
+ return f_head_cptr (f);
}
/**
@@ -618,11 +660,12 @@ svm_fifo_head_chunk (svm_fifo_t * f)
static inline u8 *
svm_fifo_head (svm_fifo_t * f)
{
+ svm_fifo_chunk_t *head_chunk;
if (!f->shr->head_chunk)
return 0;
/* load-relaxed: consumer owned index */
- return (f->shr->head_chunk->data +
- (f->shr->head - f->shr->head_chunk->start_byte));
+ head_chunk = f_head_cptr (f);
+ return (head_chunk->data + (f->shr->head - head_chunk->start_byte));
}
/**
@@ -634,7 +677,7 @@ svm_fifo_head (svm_fifo_t * f)
static inline svm_fifo_chunk_t *
svm_fifo_tail_chunk (svm_fifo_t * f)
{
- return f->shr->tail_chunk;
+ return f_tail_cptr (f);
}
/**
@@ -646,9 +689,11 @@ svm_fifo_tail_chunk (svm_fifo_t * f)
static inline u8 *
svm_fifo_tail (svm_fifo_t * f)
{
+ svm_fifo_chunk_t *tail_chunk;
+
/* load-relaxed: producer owned index */
- return (f->shr->tail_chunk->data +
- (f->shr->tail - f->shr->tail_chunk->start_byte));
+ tail_chunk = f_tail_cptr (f);
+ return (tail_chunk->data + (f->shr->tail - tail_chunk->start_byte));
}
/**