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-rw-r--r--src/plugins/avf/avf.h4
-rw-r--r--src/plugins/avf/output.c209
2 files changed, 109 insertions, 104 deletions
diff --git a/src/plugins/avf/avf.h b/src/plugins/avf/avf.h
index 030f05ec934..57fc4d1e0e0 100644
--- a/src/plugins/avf/avf.h
+++ b/src/plugins/avf/avf.h
@@ -32,6 +32,10 @@
#define AVF_RXD_ERROR_IPE (1ULL << (AVF_RXD_ERROR_SHIFT + 3))
#define AVF_RXD_ERROR_L4E (1ULL << (AVF_RXD_ERROR_SHIFT + 4))
+#define AVF_TXD_CMD(x) (1 << (x + 4))
+#define AVF_TXD_CMD_EOP AVF_TXD_CMD(0)
+#define AVF_TXD_CMD_RS AVF_TXD_CMD(1)
+#define AVF_TXD_CMD_RSV AVF_TXD_CMD(2)
#define foreach_avf_device_flags \
_(0, INITIALIZED, "initialized") \
diff --git a/src/plugins/avf/output.c b/src/plugins/avf/output.c
index e4b4228c71d..5a728f91bfc 100644
--- a/src/plugins/avf/output.c
+++ b/src/plugins/avf/output.c
@@ -23,17 +23,103 @@
#include <avf/avf.h>
-#define AVF_TXQ_DESC_CMD(x) (1 << (x + 4))
-#define AVF_TXQ_DESC_CMD_EOP AVF_TXQ_DESC_CMD(0)
-#define AVF_TXQ_DESC_CMD_RS AVF_TXQ_DESC_CMD(1)
-#define AVF_TXQ_DESC_CMD_RSV AVF_TXQ_DESC_CMD(2)
-
static_always_inline u8
avf_tx_desc_get_dtyp (avf_tx_desc_t * d)
{
return d->qword[1] & 0x0f;
}
+static_always_inline u16
+avf_tx_enqueue (vlib_main_t * vm, avf_txq_t * txq, u32 * buffers,
+ u32 n_packets, int use_va_dma)
+{
+ u16 next = txq->next;
+ u64 bits = (AVF_TXD_CMD_EOP | AVF_TXD_CMD_RS | AVF_TXD_CMD_RSV);
+ u16 n_desc = 0;
+ u16 n_desc_left, n_packets_left = n_packets;
+ u16 mask = txq->size - 1;
+ vlib_buffer_t *b[4];
+ avf_tx_desc_t *d = txq->descs + next;
+
+ /* avoid ring wrap */
+ n_desc_left = txq->size - clib_max (txq->next, txq->n_enqueued + 8);
+
+ while (n_packets_left && n_desc_left)
+ {
+ u32 or_flags;
+ if (n_packets_left < 8 || n_desc_left < 4)
+ goto one_by_one;
+
+ vlib_prefetch_buffer_with_index (vm, buffers[4], LOAD);
+ vlib_prefetch_buffer_with_index (vm, buffers[5], LOAD);
+ vlib_prefetch_buffer_with_index (vm, buffers[6], LOAD);
+ vlib_prefetch_buffer_with_index (vm, buffers[7], LOAD);
+
+ b[0] = vlib_get_buffer (vm, buffers[0]);
+ b[1] = vlib_get_buffer (vm, buffers[1]);
+ b[2] = vlib_get_buffer (vm, buffers[2]);
+ b[3] = vlib_get_buffer (vm, buffers[3]);
+
+ or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
+
+ if (or_flags & VLIB_BUFFER_NEXT_PRESENT)
+ goto one_by_one;
+
+ clib_memcpy_fast (txq->bufs + next, buffers, sizeof (u32) * 4);
+
+ if (use_va_dma)
+ {
+ d[0].qword[0] = vlib_buffer_get_current_va (b[0]);
+ d[1].qword[0] = vlib_buffer_get_current_va (b[1]);
+ d[2].qword[0] = vlib_buffer_get_current_va (b[2]);
+ d[3].qword[0] = vlib_buffer_get_current_va (b[3]);
+ }
+ else
+ {
+ d[0].qword[0] = vlib_buffer_get_current_pa (vm, b[0]);
+ d[1].qword[0] = vlib_buffer_get_current_pa (vm, b[1]);
+ d[2].qword[0] = vlib_buffer_get_current_pa (vm, b[2]);
+ d[3].qword[0] = vlib_buffer_get_current_pa (vm, b[3]);
+ }
+
+ d[0].qword[1] = ((u64) b[0]->current_length) << 34 | bits;
+ d[1].qword[1] = ((u64) b[1]->current_length) << 34 | bits;
+ d[2].qword[1] = ((u64) b[2]->current_length) << 34 | bits;
+ d[3].qword[1] = ((u64) b[3]->current_length) << 34 | bits;
+
+ next += 4;
+ n_desc += 4;
+ buffers += 4;
+ n_packets_left -= 4;
+ n_desc_left -= 4;
+ d += 4;
+ continue;
+
+ one_by_one:
+ txq->bufs[next] = buffers[0];
+ b[0] = vlib_get_buffer (vm, buffers[0]);
+
+ if (use_va_dma)
+ d[0].qword[0] = vlib_buffer_get_current_va (b[0]);
+ else
+ d[0].qword[0] = vlib_buffer_get_current_pa (vm, b[0]);
+
+ d[0].qword[1] = (((u64) b[0]->current_length) << 34) | bits;
+
+ next += 1;
+ n_desc += 1;
+ buffers += 1;
+ n_packets_left -= 1;
+ n_desc_left -= 1;
+ d += 1;
+ }
+
+ CLIB_MEMORY_BARRIER ();
+ *(txq->qtx_tail) = txq->next = next & mask;
+ txq->n_enqueued += n_desc;
+ return n_packets - n_packets_left;
+}
+
VNET_DEVICE_CLASS_TX_FN (avf_device_class) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
@@ -44,28 +130,21 @@ VNET_DEVICE_CLASS_TX_FN (avf_device_class) (vlib_main_t * vm,
u32 thread_index = vm->thread_index;
u8 qid = thread_index;
avf_txq_t *txq = vec_elt_at_index (ad->txqs, qid % ad->num_queue_pairs);
- avf_tx_desc_t *d0, *d1, *d2, *d3;
u32 *buffers = vlib_frame_vector_args (frame);
- u32 bi0, bi1, bi2, bi3;
- u16 n_left, n_left_to_send, n_in_batch;
- vlib_buffer_t *b0, *b1, *b2, *b3;
- u16 next;
+ u16 n_enq, n_left;
u16 n_retry = 5;
- u16 mask = txq->size - 1;
- u64 bits = (AVF_TXQ_DESC_CMD_EOP | AVF_TXQ_DESC_CMD_RS |
- AVF_TXQ_DESC_CMD_RSV);
clib_spinlock_lock_if_init (&txq->lock);
- n_left_to_send = frame->n_vectors;
- next = txq->next;
+ n_left = frame->n_vectors;
retry:
/* release consumed bufs */
if (txq->n_enqueued)
{
- u16 first, slot, n_free = 0;
- first = slot = (next - txq->n_enqueued) & mask;
+ avf_tx_desc_t *d0;
+ u16 first, slot, n_free = 0, mask = txq->size - 1;
+ first = slot = (txq->next - txq->n_enqueued) & mask;
d0 = txq->descs + slot;
while (n_free < txq->n_enqueued && avf_tx_desc_get_dtyp (d0) == 0x0F)
{
@@ -82,101 +161,23 @@ retry:
}
}
- n_in_batch = clib_min (n_left_to_send, txq->size - txq->n_enqueued - 8);
- n_left = n_in_batch;
-
- while (n_left >= 8)
- {
- u16 slot0, slot1, slot2, slot3;
-
- vlib_prefetch_buffer_with_index (vm, buffers[4], LOAD);
- vlib_prefetch_buffer_with_index (vm, buffers[5], LOAD);
- vlib_prefetch_buffer_with_index (vm, buffers[6], LOAD);
- vlib_prefetch_buffer_with_index (vm, buffers[7], LOAD);
-
- slot0 = next;
- slot1 = (next + 1) & mask;
- slot2 = (next + 2) & mask;
- slot3 = (next + 3) & mask;
-
- d0 = txq->descs + slot0;
- d1 = txq->descs + slot1;
- d2 = txq->descs + slot2;
- d3 = txq->descs + slot3;
-
- bi0 = buffers[0];
- bi1 = buffers[1];
- bi2 = buffers[2];
- bi3 = buffers[3];
-
- txq->bufs[slot0] = bi0;
- txq->bufs[slot1] = bi1;
- txq->bufs[slot2] = bi2;
- txq->bufs[slot3] = bi3;
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
- b2 = vlib_get_buffer (vm, bi2);
- b3 = vlib_get_buffer (vm, bi3);
-
- if (ad->flags & AVF_DEVICE_F_VA_DMA)
- {
- d0->qword[0] = vlib_buffer_get_current_va (b0);
- d1->qword[0] = vlib_buffer_get_current_va (b1);
- d2->qword[0] = vlib_buffer_get_current_va (b2);
- d3->qword[0] = vlib_buffer_get_current_va (b3);
- }
- else
- {
- d0->qword[0] = vlib_buffer_get_current_pa (vm, b0);
- d1->qword[0] = vlib_buffer_get_current_pa (vm, b1);
- d2->qword[0] = vlib_buffer_get_current_pa (vm, b2);
- d3->qword[0] = vlib_buffer_get_current_pa (vm, b3);
- }
-
- d0->qword[1] = ((u64) b0->current_length) << 34 | bits;
- d1->qword[1] = ((u64) b1->current_length) << 34 | bits;
- d2->qword[1] = ((u64) b2->current_length) << 34 | bits;
- d3->qword[1] = ((u64) b3->current_length) << 34 | bits;
+ if (ad->flags & AVF_DEVICE_F_VA_DMA)
+ n_enq = avf_tx_enqueue (vm, txq, buffers, n_left, 1);
+ else
+ n_enq = avf_tx_enqueue (vm, txq, buffers, n_left, 0);
- next = (next + 4) & mask;
- txq->n_enqueued += 4;
- buffers += 4;
- n_left -= 4;
- }
+ n_left -= n_enq;
- while (n_left)
+ if (n_left)
{
- d0 = txq->descs + next;
- bi0 = buffers[0];
- txq->bufs[next] = bi0;
- b0 = vlib_get_buffer (vm, bi0);
-
- if (ad->flags & AVF_DEVICE_F_VA_DMA)
- d0->qword[0] = vlib_buffer_get_current_va (b0);
- else
- d0->qword[0] = vlib_buffer_get_current_pa (vm, b0);
+ buffers += n_enq;
- d0->qword[1] = (((u64) b0->current_length) << 34) | bits;
-
- next = (next + 1) & mask;
- txq->n_enqueued++;
- buffers++;
- n_left--;
- }
-
- CLIB_MEMORY_BARRIER ();
- *(txq->qtx_tail) = txq->next = next;
-
- n_left_to_send -= n_in_batch;
-
- if (n_left_to_send)
- {
if (n_retry--)
goto retry;
- vlib_buffer_free (vm, buffers, n_left_to_send);
+ vlib_buffer_free (vm, buffers, n_left);
vlib_error_count (vm, node->node_index,
- AVF_TX_ERROR_NO_FREE_SLOTS, n_left_to_send);
+ AVF_TX_ERROR_NO_FREE_SLOTS, n_left);
}
clib_spinlock_unlock_if_init (&txq->lock);