{
b = vlib_get_buffer (vm, buffer_index);
l = b->current_length;
- clib_memcpy (contents + content_len, b->data + b->current_data, l);
+ clib_memcpy_fast (contents + content_len, b->data + b->current_data, l);
content_len += l;
if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
break;
return content_len;
}
-/* Return physical address of buffer->data start. */
-always_inline u64
-vlib_get_buffer_data_physical_address (vlib_main_t * vm, u32 buffer_index)
+always_inline uword
+vlib_buffer_get_pa (vlib_main_t * vm, vlib_buffer_t * b)
{
- vlib_buffer_main_t *bm = &buffer_main;
- vlib_buffer_t *b = vlib_get_buffer (vm, buffer_index);
- vlib_buffer_pool_t *pool = vec_elt_at_index (bm->buffer_pools,
- b->buffer_pool_index);
+ return vlib_physmem_get_pa (vm, b->data);
+}
- return vlib_physmem_virtual_to_physical (vm, pool->physmem_region, b->data);
+always_inline uword
+vlib_buffer_get_current_pa (vlib_main_t * vm, vlib_buffer_t * b)
+{
+ return vlib_buffer_get_pa (vm, b) + b->current_data;
}
/** \brief Prefetch buffer metadata by buffer index
/* following code is intentionaly duplicated to allow compiler
to optimize fast path when n_buffers is constant value */
src = fl->buffers + len - n_buffers;
- clib_memcpy (buffers, src, n_buffers * sizeof (u32));
+ clib_memcpy_fast (buffers, src, n_buffers * sizeof (u32));
_vec_len (fl->buffers) -= n_buffers;
/* Verify that buffers are known free. */
}
src = fl->buffers + len - n_buffers;
- clib_memcpy (buffers, src, n_buffers * sizeof (u32));
+ clib_memcpy_fast (buffers, src, n_buffers * sizeof (u32));
_vec_len (fl->buffers) -= n_buffers;
/* Verify that buffers are known free. */
d->flags = s->flags & flag_mask;
d->total_length_not_including_first_buffer =
s->total_length_not_including_first_buffer;
- clib_memcpy (d->opaque, s->opaque, sizeof (s->opaque));
- clib_memcpy (d->opaque2, s->opaque2, sizeof (s->opaque2));
- clib_memcpy (vlib_buffer_get_current (d),
- vlib_buffer_get_current (s), s->current_length);
+ clib_memcpy_fast (d->opaque, s->opaque, sizeof (s->opaque));
+ clib_memcpy_fast (d->opaque2, s->opaque2, sizeof (s->opaque2));
+ clib_memcpy_fast (vlib_buffer_get_current (d),
+ vlib_buffer_get_current (s), s->current_length);
/* next segments */
for (i = 1; i < n_buffers; i++)
d = vlib_get_buffer (vm, new_buffers[i]);
d->current_data = s->current_data;
d->current_length = s->current_length;
- clib_memcpy (vlib_buffer_get_current (d),
- vlib_buffer_get_current (s), s->current_length);
+ clib_memcpy_fast (vlib_buffer_get_current (d),
+ vlib_buffer_get_current (s), s->current_length);
d->flags = s->flags & flag_mask;
}
}
d->flags = s->flags | VLIB_BUFFER_NEXT_PRESENT;
d->flags &= ~VLIB_BUFFER_EXT_HDR_VALID;
- clib_memcpy (d->opaque, s->opaque, sizeof (s->opaque));
- clib_memcpy (d->opaque2, s->opaque2, sizeof (s->opaque2));
- clib_memcpy (vlib_buffer_get_current (d), vlib_buffer_get_current (s),
- head_end_offset);
+ clib_memcpy_fast (d->opaque, s->opaque, sizeof (s->opaque));
+ clib_memcpy_fast (d->opaque2, s->opaque2, sizeof (s->opaque2));
+ clib_memcpy_fast (vlib_buffer_get_current (d),
+ vlib_buffer_get_current (s), head_end_offset);
d->next_buffer = src_buffer;
}
vlib_buffer_advance (s, head_end_offset);
/* The provided next_bi buffer index is appended to the end of the packet. */
always_inline vlib_buffer_t *
-vlib_buffer_chain_buffer (vlib_main_t * vm,
- vlib_buffer_t * first,
- vlib_buffer_t * last, u32 next_bi)
+vlib_buffer_chain_buffer (vlib_main_t * vm, vlib_buffer_t * last, u32 next_bi)
{
vlib_buffer_t *next_buffer = vlib_get_buffer (vm, next_bi);
last->next_buffer = next_bi;
u16 len = clib_min (data_len,
n_buffer_bytes - last->current_length -
last->current_data);
- clib_memcpy (vlib_buffer_get_current (last) + last->current_length, data,
- len);
+ clib_memcpy_fast (vlib_buffer_get_current (last) + last->current_length,
+ data, len);
vlib_buffer_chain_increase_length (first, last, len);
return len;
}
/* Make sure buffer template is sane. */
ASSERT (fl->index == vlib_buffer_get_free_list_index (src));
- clib_memcpy (STRUCT_MARK_PTR (dst, template_start),
- STRUCT_MARK_PTR (src, template_start),
- STRUCT_OFFSET_OF (vlib_buffer_t, template_end) -
- STRUCT_OFFSET_OF (vlib_buffer_t, template_start));
+ clib_memcpy_fast (STRUCT_MARK_PTR (dst, template_start),
+ STRUCT_MARK_PTR (src, template_start),
+ STRUCT_OFFSET_OF (vlib_buffer_t, template_end) -
+ STRUCT_OFFSET_OF (vlib_buffer_t, template_start));
/* Not in the first 16 octets. */
dst->n_add_refs = src->n_add_refs;
vlib_buffer_t *second = vlib_get_buffer (vm, first->next_buffer);
u32 need = want_first_size - first->current_length;
u32 amount_to_copy = clib_min (need, second->current_length);
- clib_memcpy (((u8 *) vlib_buffer_get_current (first)) +
- first->current_length,
- vlib_buffer_get_current (second), amount_to_copy);
+ clib_memcpy_fast (((u8 *) vlib_buffer_get_current (first)) +
+ first->current_length,
+ vlib_buffer_get_current (second), amount_to_copy);
first->current_length += amount_to_copy;
vlib_buffer_advance (second, amount_to_copy);
if (first->flags & VLIB_BUFFER_TOTAL_LENGTH_VALID)
(first->flags & VLIB_BUFFER_NEXT_PRESENT));
}
+/**
+ * @brief linearize buffer chain - the first buffer is filled, if needed,
+ * buffers are allocated and filled, returns free space in last buffer or
+ * negative on failure
+ *
+ * @param[in] vm - vlib_main
+ * @param[in,out] first - first buffer in chain
+ */
+always_inline int
+vlib_buffer_chain_linearize (vlib_main_t * vm, vlib_buffer_t * first)
+{
+ vlib_buffer_t *b = first;
+ vlib_buffer_free_list_t *fl =
+ vlib_buffer_get_free_list (vm, vlib_buffer_get_free_list_index (b));
+ u32 buf_len = fl->n_data_bytes;
+ // free buffer chain starting from the second buffer
+ int free_count = (b->flags & VLIB_BUFFER_NEXT_PRESENT) != 0;
+ u32 chain_to_free = b->next_buffer;
+
+ u32 len = vlib_buffer_length_in_chain (vm, b);
+ u32 free_len = buf_len - b->current_data - b->current_length;
+ int alloc_len = clib_max (len - free_len, 0); //use the free len in the first buffer
+ int n_buffers = (alloc_len + buf_len - 1) / buf_len;
+ u32 new_buffers[n_buffers];
+
+ u32 n_alloc = vlib_buffer_alloc (vm, new_buffers, n_buffers);
+ if (n_alloc != n_buffers)
+ {
+ vlib_buffer_free_no_next (vm, new_buffers, n_alloc);
+ return -1;
+ }
+
+ vlib_buffer_t *s = b;
+ while (s->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ s = vlib_get_buffer (vm, s->next_buffer);
+ int d_free_len = buf_len - b->current_data - b->current_length;
+ ASSERT (d_free_len >= 0);
+ // chain buf and split write
+ u32 copy_len = clib_min (d_free_len, s->current_length);
+ u8 *d = vlib_buffer_put_uninit (b, copy_len);
+ clib_memcpy (d, vlib_buffer_get_current (s), copy_len);
+ int rest = s->current_length - copy_len;
+ if (rest > 0)
+ {
+ //prev buf is full
+ ASSERT (vlib_buffer_get_tail (b) == b->data + buf_len);
+ ASSERT (n_buffers > 0);
+ b = vlib_buffer_chain_buffer (vm, b, new_buffers[--n_buffers]);
+ //make full use of the new buffers
+ b->current_data = 0;
+ d = vlib_buffer_put_uninit (b, rest);
+ clib_memcpy (d, vlib_buffer_get_current (s) + copy_len, rest);
+ }
+ }
+ vlib_buffer_free (vm, &chain_to_free, free_count);
+ b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ if (b == first) /* no buffers addeed */
+ b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
+ ASSERT (len == vlib_buffer_length_in_chain (vm, first));
+ ASSERT (n_buffers == 0);
+ return buf_len - b->current_data - b->current_length;
+}
+
#endif /* included_vlib_buffer_funcs_h */
/*
Code Review / vpp.git / blobdiff