X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvlib%2Fbuffer.h;h=99f40e840a56b14acb81a2f03ce68d87946842c8;hb=b4d3053;hp=48988222de713765100dd8eee49eadd60ac869f3;hpb=d1274cb207a48f0142a5a6cbcd22d61c22dbc230;p=vpp.git
diff --git a/src/vlib/buffer.h b/src/vlib/buffer.h
index 48988222de7..99f40e840a5 100644
--- a/src/vlib/buffer.h
+++ b/src/vlib/buffer.h
@@ -51,6 +51,14 @@
#define VLIB_BUFFER_DATA_SIZE (2048)
#define VLIB_BUFFER_PRE_DATA_SIZE __PRE_DATA_SIZE
+/* Minimum buffer chain segment size. Does not apply to last buffer in chain.
+ Dataplane code can safely asume that specified amount of data is not split
+ into 2 chained buffers */
+#define VLIB_BUFFER_MIN_CHAIN_SEG_SIZE (128)
+
+/* Amount of head buffer data copied to each replica head buffer */
+#define VLIB_BUFFER_CLONE_HEAD_SIZE (256)
+
typedef u8 vlib_buffer_free_list_index_t;
/** \file
@@ -67,11 +75,8 @@ typedef u8 vlib_buffer_free_list_index_t;
_( 0, NON_DEFAULT_FREELIST, "non-default-fl") \
_( 1, IS_TRACED, 0) \
_( 2, NEXT_PRESENT, 0) \
- _( 3, IS_RECYCLED, "is-recycled") \
- _( 4, TOTAL_LENGTH_VALID, 0) \
- _( 5, REPL_FAIL, "repl-fail") \
- _( 6, RECYCLE, "recycle") \
- _( 7, EXT_HDR_VALID, "ext-hdr-valid")
+ _( 3, TOTAL_LENGTH_VALID, 0) \
+ _( 4, EXT_HDR_VALID, "ext-hdr-valid")
/* NOTE: only buffer generic flags should be defined here, please consider
using user flags. i.e. src/vnet/buffer.h */
@@ -113,38 +118,29 @@ typedef struct
VLIB_BUFFER_IS_TRACED: trace this buffer.
VLIB_BUFFER_NEXT_PRESENT: this is a multi-chunk buffer.
VLIB_BUFFER_TOTAL_LENGTH_VALID: as it says
-
VLIB_BUFFER_REPL_FAIL: packet replication failure
-
VLIB_BUFFER_RECYCLE: as it says
VLIB_BUFFER_EXT_HDR_VALID: buffer contains valid external buffer manager header,
set to avoid adding it to a flow report
VLIB_BUFFER_FLAG_USER(n): user-defined bit N
*/
+ u32 flow_id; /**< Generic flow identifier */
- STRUCT_MARK (template_end);
u32 next_buffer; /**< Next buffer for this linked-list of buffers.
Only valid if VLIB_BUFFER_NEXT_PRESENT flag is set.
*/
- vlib_error_t error; /**< Error code for buffers to be enqueued
- to error handler.
- */
+ STRUCT_MARK (template_end);
+
u32 current_config_index; /**< Used by feature subgraph arcs to
visit enabled feature nodes
*/
-
- u8 feature_arc_index; /**< Used to identify feature arcs by intermediate
- feature node
+ vlib_error_t error; /**< Error code for buffers to be enqueued
+ to error handler.
*/
-
u8 n_add_refs; /**< Number of additional references to this buffer. */
u8 buffer_pool_index; /**< index of buffer pool this buffer belongs. */
- u8 dont_waste_me[1]; /**< Available space in the (precious)
- first 32 octets of buffer metadata
- Before allocating any of it, discussion required!
- */
u32 opaque[10]; /**< Opaque data used by sub-graphs for their own purposes.
See .../vnet/vnet/buffer.h
@@ -199,6 +195,12 @@ vlib_buffer_struct_is_sane (vlib_buffer_t * b)
ASSERT (b->pre_data + VLIB_BUFFER_PRE_DATA_SIZE == b->data);
}
+always_inline uword
+vlib_buffer_get_va (vlib_buffer_t * b)
+{
+ return pointer_to_uword (b->data);
+}
+
/** \brief Get pointer to current data to process
@param b - (vlib_buffer_t *) pointer to the buffer
@@ -213,6 +215,12 @@ vlib_buffer_get_current (vlib_buffer_t * b)
return b->data + b->current_data;
}
+always_inline uword
+vlib_buffer_get_current_va (vlib_buffer_t * b)
+{
+ return vlib_buffer_get_va (b) + b->current_data;
+}
+
/** \brief Advance current data pointer by the supplied (signed!) amount
@param b - (vlib_buffer_t *) pointer to the buffer
@@ -224,6 +232,9 @@ vlib_buffer_advance (vlib_buffer_t * b, word l)
ASSERT (b->current_length >= l);
b->current_data += l;
b->current_length -= l;
+
+ ASSERT ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0 ||
+ b->current_length >= VLIB_BUFFER_MIN_CHAIN_SEG_SIZE);
}
/** \brief Check if there is enough space in buffer to advance
@@ -377,11 +388,6 @@ typedef struct vlib_buffer_free_list_t
struct vlib_buffer_free_list_t * fl,
u32 * buffers, u32 n_buffers);
- /* Callback function to announce that buffers have been
- added to the freelist */
- void (*buffers_added_to_freelist_function)
- (struct vlib_main_t * vm, struct vlib_buffer_free_list_t * fl);
-
uword buffer_init_function_opaque;
} __attribute__ ((aligned (16))) vlib_buffer_free_list_t;
@@ -417,16 +423,9 @@ typedef struct
uword start;
uword size;
uword log2_page_size;
- vlib_physmem_region_index_t physmem_region;
-
+ u32 physmem_map_index;
+ u32 buffer_size;
u32 *buffers;
-
- u16 buffer_size;
- uword buffers_per_page;
- uword n_elts;
- uword n_used;
- uword next_clear;
- uword *bitmap;
clib_spinlock_t lock;
} vlib_buffer_pool_t;
@@ -471,9 +470,8 @@ vlib_buffer_pool_get (u8 buffer_pool_index)
return vec_elt_at_index (bm->buffer_pools, buffer_pool_index);
}
-u8 vlib_buffer_pool_create (struct vlib_main_t * vm,
- vlib_physmem_region_index_t region,
- u16 buffer_size);
+u8 vlib_buffer_register_physmem_map (struct vlib_main_t * vm,
+ u32 physmem_map_index);
clib_error_t *vlib_buffer_main_init (struct vlib_main_t *vm);
@@ -565,6 +563,10 @@ static void __vlib_add_buffer_callbacks_t_##x (void) \
clib_panic ("vlib buffer callbacks already registered"); \
vlib_buffer_callbacks = &__##x##_buffer_callbacks; \
} \
+static void __vlib_rm_buffer_callbacks_t_##x (void) \
+ __attribute__((__destructor__)) ; \
+static void __vlib_rm_buffer_callbacks_t_##x (void) \
+{ vlib_buffer_callbacks = 0; } \
__VA_ARGS__ vlib_buffer_callbacks_t __##x##_buffer_callbacks
/*