Marvell device plugin

[vpp.git] / src / plugins / marvell / pp2 / output.c

diff --git a/src/plugins/marvell/pp2/output.c b/src/plugins/marvell/pp2/output.c
new file mode 100644 (file)
index 0000000..6452994
--- /dev/null
+++ b/src/plugins/marvell/pp2/output.c
@@ -0,0 +1,121 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <stdint.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/devices/devices.h>
+
+#include <marvell/pp2/pp2.h>
+
+uword
+mrvl_pp2_interface_tx (vlib_main_t * vm,
+                      vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  mrvl_pp2_main_t *ppm = &mrvl_pp2_main;
+  vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+  mrvl_pp2_if_t *ppif = pool_elt_at_index (ppm->interfaces, rd->dev_instance);
+  u32 thread_index = vlib_get_thread_index ();
+  mrvl_pp2_per_thread_data_t *ptd =
+    vec_elt_at_index (ppm->per_thread_data, thread_index);
+  u8 qid = thread_index;
+  mrvl_pp2_outq_t *outq = vec_elt_at_index (ppif->outqs, qid);
+  u32 *buffers = vlib_frame_args (frame);
+  u16 n_desc = frame->n_vectors, n_left = n_desc, n_sent = n_desc, n_done;
+  struct pp2_ppio_desc *d;
+  u16 mask = outq->size - 1;
+
+  if (PREDICT_FALSE (pp2_ppio_get_num_outq_done (ppif->ppio, ptd->hif, qid,
+                                                &n_done)))
+    {
+      n_done = 0;
+      vlib_error_count (vm, node->node_index,
+                       MRVL_PP2_TX_ERROR_PPIO_GET_NUM_OUTQ_DONE, 1);
+    }
+
+  if (n_done)
+    {
+      u16 n_free = clib_min (n_done, outq->size - (outq->tail & mask));
+      vlib_buffer_free (vm, outq->buffers + (outq->tail & mask), n_free);
+      if (PREDICT_FALSE (n_free < n_done))
+       vlib_buffer_free (vm, outq->buffers, n_done - n_free);
+      outq->tail += n_done;
+    }
+
+  vec_validate_aligned (ptd->descs, n_left, CLIB_CACHE_LINE_BYTES);
+  d = ptd->descs;
+  while (n_left)
+    {
+      u32 bi0 = buffers[0];
+      vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+      u64 paddr = vlib_get_buffer_data_physical_address (vm, bi0);
+
+      pp2_ppio_outq_desc_reset (d);
+      pp2_ppio_outq_desc_set_phys_addr (d, paddr + b0->current_data);
+      pp2_ppio_outq_desc_set_pkt_offset (d, 0);
+      pp2_ppio_outq_desc_set_pkt_len (d, b0->current_length);
+      d++;
+      buffers++;
+      n_left--;
+    }
+
+  if (pp2_ppio_send (ppif->ppio, ptd->hif, qid, ptd->descs, &n_sent))
+    {
+      n_sent = 0;
+      vlib_error_count (vm, node->node_index, MRVL_PP2_TX_ERROR_PPIO_SEND, 1);
+    }
+
+  /* free unsent buffers */
+  if (PREDICT_FALSE (n_sent != n_desc))
+    {
+      vlib_buffer_free (vm, vlib_frame_args (frame) + n_sent,
+                       frame->n_vectors - n_sent);
+      vlib_error_count (vm, node->node_index, MRVL_PP2_TX_ERROR_NO_FREE_SLOTS,
+                       frame->n_vectors - n_sent);
+    }
+
+  /* store buffer index for each enqueued packet into the ring
+     so we can know what to free after packet is sent */
+  if (n_sent)
+    {
+      u16 slot = outq->head & mask;
+      buffers = vlib_frame_args (frame);
+      u16 n_copy = clib_min (outq->size - slot, n_sent);
+
+      clib_memcpy (outq->buffers + slot, buffers, n_copy * sizeof (u32));
+      if (PREDICT_FALSE (n_copy < n_sent))
+       clib_memcpy (outq->buffers, buffers + n_copy,
+                    (n_sent - n_copy) * sizeof (u32));
+
+      outq->head += n_sent;
+    }
+
+  return n_sent;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */