#define foreach_memif_tx_func_error \
_(NO_FREE_SLOTS, "no free tx slots") \
+_(TRUNC_PACKET, "packet > buffer size -- truncated in tx ring") \
_(PENDING_MSGS, "pending msgs in tx ring")
typedef enum
CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, LOAD);
}
+/**
+ * @brief Copy buffer to tx ring
+ *
+ * @param * vm (in)
+ * @param * node (in)
+ * @param * mif (in) pointer to memif interface
+ * @param bi (in) vlib buffer index
+ * @param * ring (in) pointer to memif ring
+ * @param * head (in/out) ring head
+ * @param mask (in) ring size - 1
+ */
+static_always_inline void
+memif_copy_buffer_to_tx_ring (vlib_main_t * vm, vlib_node_runtime_t * node,
+ memif_if_t * mif, u32 bi, memif_ring_t * ring,
+ u16 * head, u16 mask)
+{
+ vlib_buffer_t *b0;
+ void *mb0;
+ u32 total = 0, len;
+
+ mb0 = memif_get_buffer (mif, ring, *head);
+ ring->desc[*head].flags = 0;
+ do
+ {
+ b0 = vlib_get_buffer (vm, bi);
+ len = b0->current_length;
+ if (PREDICT_FALSE (ring->desc[*head].buffer_length < (total + len)))
+ {
+ if (PREDICT_TRUE (total))
+ {
+ ring->desc[*head].length = total;
+ total = 0;
+ ring->desc[*head].flags |= MEMIF_DESC_FLAG_NEXT;
+ *head = (*head + 1) & mask;
+ mb0 = memif_get_buffer (mif, ring, *head);
+ ring->desc[*head].flags = 0;
+ }
+ }
+ if (PREDICT_TRUE (ring->desc[*head].buffer_length >= (total + len)))
+ {
+ clib_memcpy (mb0 + total, vlib_buffer_get_current (b0),
+ CLIB_CACHE_LINE_BYTES);
+ if (len > CLIB_CACHE_LINE_BYTES)
+ clib_memcpy (mb0 + CLIB_CACHE_LINE_BYTES + total,
+ vlib_buffer_get_current (b0) + CLIB_CACHE_LINE_BYTES,
+ len - CLIB_CACHE_LINE_BYTES);
+ total += len;
+ }
+ else
+ {
+ vlib_error_count (vm, node->node_index, MEMIF_TX_ERROR_TRUNC_PACKET,
+ 1);
+ break;
+ }
+ }
+ while ((bi = (b0->flags & VLIB_BUFFER_NEXT_PRESENT) ? b0->next_buffer : 0));
+
+ if (PREDICT_TRUE (total))
+ {
+ ring->desc[*head].length = total;
+ *head = (*head + 1) & mask;
+ }
+}
+
static_always_inline uword
memif_interface_tx_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, memif_if_t * mif,
memif_prefetch_buffer_and_data (vm, buffers[2]);
memif_prefetch_buffer_and_data (vm, buffers[3]);
- vlib_buffer_t *b0 = vlib_get_buffer (vm, buffers[0]);
- vlib_buffer_t *b1 = vlib_get_buffer (vm, buffers[1]);
-
- void *mb0 = memif_get_buffer (mif, ring, head);
- clib_memcpy (mb0, vlib_buffer_get_current (b0), CLIB_CACHE_LINE_BYTES);
- ring->desc[head].length = b0->current_length;
- head = (head + 1) & mask;
-
- void *mb1 = memif_get_buffer (mif, ring, head);
- clib_memcpy (mb1, vlib_buffer_get_current (b1), CLIB_CACHE_LINE_BYTES);
- ring->desc[head].length = b1->current_length;
- head = (head + 1) & mask;
-
- if (b0->current_length > CLIB_CACHE_LINE_BYTES)
- {
- clib_memcpy (mb0 + CLIB_CACHE_LINE_BYTES,
- vlib_buffer_get_current (b0) + CLIB_CACHE_LINE_BYTES,
- b0->current_length - CLIB_CACHE_LINE_BYTES);
- }
- if (b1->current_length > CLIB_CACHE_LINE_BYTES)
- {
- clib_memcpy (mb1 + CLIB_CACHE_LINE_BYTES,
- vlib_buffer_get_current (b1) + CLIB_CACHE_LINE_BYTES,
- b1->current_length - CLIB_CACHE_LINE_BYTES);
- }
-
+ memif_copy_buffer_to_tx_ring (vm, node, mif, buffers[0], ring, &head,
+ mask);
+ memif_copy_buffer_to_tx_ring (vm, node, mif, buffers[1], ring, &head,
+ mask);
buffers += 2;
n_left -= 2;
while (n_left && free_slots)
{
- vlib_buffer_t *b0 = vlib_get_buffer (vm, buffers[0]);
- void *mb0 = memif_get_buffer (mif, ring, head);
- clib_memcpy (mb0, vlib_buffer_get_current (b0), CLIB_CACHE_LINE_BYTES);
-
- if (b0->current_length > CLIB_CACHE_LINE_BYTES)
- {
- clib_memcpy (mb0 + CLIB_CACHE_LINE_BYTES,
- vlib_buffer_get_current (b0) + CLIB_CACHE_LINE_BYTES,
- b0->current_length - CLIB_CACHE_LINE_BYTES);
- }
- ring->desc[head].length = b0->current_length;
- head = (head + 1) & mask;
-
+ memif_copy_buffer_to_tx_ring (vm, node, mif, buffers[0], ring, &head,
+ mask);
buffers++;
n_left--;
free_slots--;
CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, STORE);
}
+static_always_inline void
+memif_buffer_add_to_chain (vlib_main_t * vm, u32 bi, u32 first_bi,
+ u32 prev_bi)
+{
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+ vlib_buffer_t *first_b = vlib_get_buffer (vm, first_bi);
+ vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_bi);
+
+ /* update first buffer */
+ first_b->total_length_not_including_first_buffer += b->current_length;
+
+ /* update previous buffer */
+ prev_b->next_buffer = bi;
+ prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
+
+ /* update current buffer */
+ b->next_buffer = 0;
+}
+
+/**
+ * @brief Copy buffer from rx ring
+ *
+ * @param * vm (in)
+ * @param * mif (in) pointer to memif interface
+ * @param * ring (in) pointer to memif ring
+ * @param * rd (in) pointer to ring data
+ * @param ring_size (in) ring size
+ * @param * n_free_bufs (in/out) the number of free vlib buffers available
+ * @param ** first_b (out) the first vlib buffer pointer
+ * @param * first_bi (out) the first vlib buffer index
+ * @param * bi (in/out) the current buffer index
+ * #param * num_slots (in/out) the number of descriptors available to read
+ *
+ * @return total bytes read from rx ring also written to vlib buffers
+ */
+static_always_inline uword
+memif_copy_buffer_from_rx_ring (vlib_main_t * vm, memif_if_t * mif,
+ memif_ring_t * ring, memif_queue_t * mq,
+ u16 ring_size, u32 n_buffer_bytes,
+ u32 * n_free_bufs, vlib_buffer_t ** first_b,
+ u32 * first_bi, u32 * bi, u16 * num_slots)
+{
+ memif_main_t *nm = &memif_main;
+ u32 thread_index = vlib_get_thread_index ();
+ u32 total_bytes = 0, offset = 0;
+ u32 data_len;
+ u32 bytes_to_copy;
+ void *mb;
+ vlib_buffer_t *b;
+ u16 mask = ring_size - 1;
+ u32 prev_bi;
+ u16 last_head;
+
+ while (*num_slots)
+ {
+ data_len = ring->desc[mq->last_head].length;
+ while (data_len && (*n_free_bufs))
+ {
+ /* get empty buffer */
+ u32 last_buf = vec_len (nm->rx_buffers[thread_index]) - 1;
+ prev_bi = *bi;
+ *bi = nm->rx_buffers[thread_index][last_buf];
+ b = vlib_get_buffer (vm, *bi);
+ _vec_len (nm->rx_buffers[thread_index]) = last_buf;
+ (*n_free_bufs)--;
+ if (PREDICT_FALSE (*n_free_bufs == 0))
+ {
+ *n_free_bufs +=
+ vlib_buffer_alloc (vm,
+ &nm->rx_buffers[thread_index]
+ [*n_free_bufs], ring_size);
+ _vec_len (nm->rx_buffers[thread_index]) = *n_free_bufs;
+ }
+
+ if (last_buf > 4)
+ {
+ memif_prefetch (vm, nm->rx_buffers[thread_index][last_buf - 2]);
+ memif_prefetch (vm, nm->rx_buffers[thread_index][last_buf - 3]);
+ }
+
+ /* copy buffer */
+ bytes_to_copy =
+ data_len > n_buffer_bytes ? n_buffer_bytes : data_len;
+ b->current_data = 0;
+ mb = memif_get_buffer (mif, ring, mq->last_head);
+ clib_memcpy (vlib_buffer_get_current (b), mb + offset,
+ CLIB_CACHE_LINE_BYTES);
+ if (bytes_to_copy > CLIB_CACHE_LINE_BYTES)
+ clib_memcpy (vlib_buffer_get_current (b) + CLIB_CACHE_LINE_BYTES,
+ mb + CLIB_CACHE_LINE_BYTES + offset,
+ bytes_to_copy - CLIB_CACHE_LINE_BYTES);
+
+ /* fill buffer header */
+ b->current_length = bytes_to_copy;
+
+ if (total_bytes == 0)
+ {
+ /* fill buffer metadata */
+ b->total_length_not_including_first_buffer = 0;
+ b->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = mif->sw_if_index;
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ *first_bi = *bi;
+ *first_b = vlib_get_buffer (vm, *first_bi);
+ }
+ else
+ memif_buffer_add_to_chain (vm, *bi, *first_bi, prev_bi);
+
+ offset += bytes_to_copy;
+ total_bytes += bytes_to_copy;
+ data_len -= bytes_to_copy;
+ }
+ last_head = mq->last_head;
+ /* Advance to next descriptor */
+ mq->last_head = (mq->last_head + 1) & mask;
+ offset = 0;
+ (*num_slots)--;
+ if ((ring->desc[last_head].flags & MEMIF_DESC_FLAG_NEXT) == 0)
+ break;
+ }
+
+ return (total_bytes);
+}
+
static_always_inline uword
memif_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, memif_if_t * mif,
u32 n_rx_bytes = 0;
u32 *to_next = 0;
u32 n_free_bufs;
+ u32 b0_total, b1_total;
u32 thread_index = vlib_get_thread_index ();
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
u16 ring_size, mask, num_slots;
- void *mb0, *mb1;
+ u32 n_buffer_bytes = vlib_buffer_free_list_buffer_size (vm,
+ VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
mq = vec_elt_at_index (mif->rx_queues, qid);
ring = mq->ring;
u32 next1 = next_index;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (num_slots > 5 && n_left_to_next > 2)
+ while (num_slots > 11 && n_left_to_next > 2)
{
if (PREDICT_TRUE (mq->last_head + 5 < ring_size))
{
CLIB_PREFETCH (&ring->desc[(mq->last_head + 5) % mask],
CLIB_CACHE_LINE_BYTES, LOAD);
}
- /* get empty buffer */
- u32 last_buf = vec_len (nm->rx_buffers[thread_index]) - 1;
- bi0 = nm->rx_buffers[thread_index][last_buf];
- bi1 = nm->rx_buffers[thread_index][last_buf - 1];
- _vec_len (nm->rx_buffers[thread_index]) -= 2;
- if (last_buf > 4)
- {
- memif_prefetch (vm, nm->rx_buffers[thread_index][last_buf - 2]);
- memif_prefetch (vm, nm->rx_buffers[thread_index][last_buf - 3]);
- }
+ vlib_buffer_t *first_b0 = 0;
+ u32 bi0 = 0, first_bi0 = 0;
+ b0_total = memif_copy_buffer_from_rx_ring (vm, mif, ring, mq,
+ ring_size,
+ n_buffer_bytes,
+ &n_free_bufs, &first_b0,
+ &first_bi0, &bi0,
+ &num_slots);
+
+ vlib_buffer_t *first_b1 = 0;
+ u32 bi1 = 0, first_bi1 = 0;
+ b1_total = memif_copy_buffer_from_rx_ring (vm, mif, ring, mq,
+ ring_size,
+ n_buffer_bytes,
+ &n_free_bufs, &first_b1,
+ &first_bi1, &bi1,
+ &num_slots);
/* enqueue buffer */
- to_next[0] = bi0;
- to_next[1] = bi1;
+ to_next[0] = first_bi0;
+ to_next[1] = first_bi1;
to_next += 2;
n_left_to_next -= 2;
- /* fill buffer metadata */
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
- vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index;
-
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
-
- /* copy buffer */
- mb0 = memif_get_buffer (mif, ring, mq->last_head);
- clib_memcpy (vlib_buffer_get_current (b0), mb0,
- CLIB_CACHE_LINE_BYTES);
- b0->current_length = ring->desc[mq->last_head].length;
- mq->last_head = (mq->last_head + 1) & mask;
-
- mb1 = memif_get_buffer (mif, ring, mq->last_head);
- clib_memcpy (vlib_buffer_get_current (b1), mb1,
- CLIB_CACHE_LINE_BYTES);
- b1->current_length = ring->desc[mq->last_head].length;
- mq->last_head = (mq->last_head + 1) & mask;
-
- if (b0->current_length > CLIB_CACHE_LINE_BYTES)
- clib_memcpy (vlib_buffer_get_current (b0) + CLIB_CACHE_LINE_BYTES,
- mb0 + CLIB_CACHE_LINE_BYTES,
- b0->current_length - CLIB_CACHE_LINE_BYTES);
-
- if (b1->current_length > CLIB_CACHE_LINE_BYTES)
- clib_memcpy (vlib_buffer_get_current (b1) + CLIB_CACHE_LINE_BYTES,
- mb1 + CLIB_CACHE_LINE_BYTES,
- b1->current_length - CLIB_CACHE_LINE_BYTES);
-
/* trace */
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (first_b0);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (first_b1);
if (PREDICT_FALSE (n_trace > 0))
{
/* b0 */
- memif_input_trace_t *tr;
- vlib_trace_buffer (vm, node, next0, b0,
- /* follow_chain */ 0);
- vlib_set_trace_count (vm, node, --n_trace);
- tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->next_index = next0;
- tr->hw_if_index = mif->hw_if_index;
- tr->ring = qid;
-
- if (n_trace)
+ if (PREDICT_TRUE (first_b0 != 0))
{
- /* b1 */
memif_input_trace_t *tr;
- vlib_trace_buffer (vm, node, next1, b1,
+ vlib_trace_buffer (vm, node, next0, first_b0,
/* follow_chain */ 0);
vlib_set_trace_count (vm, node, --n_trace);
- tr = vlib_add_trace (vm, node, b1, sizeof (*tr));
- tr->next_index = next1;
+ tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
+ tr->next_index = next0;
tr->hw_if_index = mif->hw_if_index;
tr->ring = qid;
}
+ if (n_trace)
+ {
+ /* b1 */
+ if (PREDICT_TRUE (first_b1 != 0))
+ {
+ memif_input_trace_t *tr;
+ vlib_trace_buffer (vm, node, next1, first_b1,
+ /* follow_chain */ 0);
+ vlib_set_trace_count (vm, node, --n_trace);
+ tr = vlib_add_trace (vm, node, first_b1, sizeof (*tr));
+ tr->next_index = next1;
+ tr->hw_if_index = mif->hw_if_index;
+ tr->ring = qid;
+ }
+ }
}
/* redirect if feature path enabled */
vnet_feature_start_device_input_x2 (mif->sw_if_index,
- &next0, &next1, b0, b1);
+ &next0, &next1, first_b0,
+ first_b1);
/* enqueue */
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
- n_left_to_next,
- bi0, bi1, next0, next1);
+ n_left_to_next, first_bi0,
+ first_bi1, next0, next1);
/* next packet */
- num_slots -= 2;
n_rx_packets += 2;
- n_rx_bytes += b0->current_length;
- n_rx_bytes += b1->current_length;
+ n_rx_bytes += b0_total + b1_total;
}
while (num_slots && n_left_to_next)
{
- /* get empty buffer */
- u32 last_buf = vec_len (nm->rx_buffers[thread_index]) - 1;
- bi0 = nm->rx_buffers[thread_index][last_buf];
- _vec_len (nm->rx_buffers[thread_index]) = last_buf;
-
- /* enqueue buffer */
- to_next[0] = bi0;
- to_next += 1;
- n_left_to_next--;
-
- /* fill buffer metadata */
- b0 = vlib_get_buffer (vm, bi0);
- b0->current_length = ring->desc[mq->last_head].length;
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
-
- /* copy buffer */
- mb0 = memif_get_buffer (mif, ring, mq->last_head);
- clib_memcpy (vlib_buffer_get_current (b0), mb0,
- CLIB_CACHE_LINE_BYTES);
- if (b0->current_length > CLIB_CACHE_LINE_BYTES)
- clib_memcpy (vlib_buffer_get_current (b0) + CLIB_CACHE_LINE_BYTES,
- mb0 + CLIB_CACHE_LINE_BYTES,
- b0->current_length - CLIB_CACHE_LINE_BYTES);
+ vlib_buffer_t *first_b0 = 0;
+ u32 bi0 = 0, first_bi0 = 0;
+ b0_total = memif_copy_buffer_from_rx_ring (vm, mif, ring, mq,
+ ring_size,
+ n_buffer_bytes,
+ &n_free_bufs, &first_b0,
+ &first_bi0, &bi0,
+ &num_slots);
/* trace */
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (first_b0);
if (PREDICT_FALSE (n_trace > 0))
{
- memif_input_trace_t *tr;
- vlib_trace_buffer (vm, node, next0, b0,
- /* follow_chain */ 0);
- vlib_set_trace_count (vm, node, --n_trace);
- tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->next_index = next0;
- tr->hw_if_index = mif->hw_if_index;
- tr->ring = qid;
+ if (PREDICT_TRUE (first_b0 != 0))
+ {
+ memif_input_trace_t *tr;
+ vlib_trace_buffer (vm, node, next0, first_b0,
+ /* follow_chain */ 0);
+ vlib_set_trace_count (vm, node, --n_trace);
+ tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
+ tr->next_index = next0;
+ tr->hw_if_index = mif->hw_if_index;
+ tr->ring = qid;
+ }
}
+ /* enqueue buffer */
+ to_next[0] = first_bi0;
+ to_next += 1;
+ n_left_to_next--;
/* redirect if feature path enabled */
- vnet_feature_start_device_input_x1 (mif->sw_if_index, &next0, b0);
+ vnet_feature_start_device_input_x1 (mif->sw_if_index, &next0,
+ first_b0);
/* enqueue */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, bi0, next0);
+ n_left_to_next, first_bi0, next0);
/* next packet */
- mq->last_head = (mq->last_head + 1) & mask;
- num_slots--;
n_rx_packets++;
- n_rx_bytes += b0->current_length;
+ n_rx_bytes += b0_total;
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
Code Review / vpp.git / commitdiff