svm: refactor memfd and remove ssvm_eth

Change-Id: Icde296e956eb89ea3a17d547f04a833916ec6440
Signed-off-by: Florin Coras <fcoras@cisco.com>

1 files changed, 0 insertions, 491 deletions

diff --git a/src/vnet/devices/ssvm/ssvm_eth.c b/src/vnet/devices/ssvm/ssvm_eth.c
deleted file mode 100644
index 8a0cebe29d4..00000000000
--- a/src/vnet/devices/ssvm/ssvm_eth.c
+++ /dev/null
@@ -1,491 +0,0 @@
-/*
- * Copyright (c) 2015 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 "ssvm_eth.h"
-
-ssvm_eth_main_t ssvm_eth_main;
-
-#define foreach_ssvm_eth_tx_func_error          \
-_(RING_FULL, "Tx packet drops (ring full)")     \
-_(NO_BUFFERS, "Tx packet drops (no buffers)")   \
-_(ADMIN_DOWN, "Tx packet drops (admin down)")
-
-typedef enum
-{
-#define _(f,s) SSVM_ETH_TX_ERROR_##f,
-  foreach_ssvm_eth_tx_func_error
-#undef _
-    SSVM_ETH_TX_N_ERROR,
-} ssvm_eth_tx_func_error_t;
-
-static u32 ssvm_eth_flag_change (vnet_main_t * vnm,
-				 vnet_hw_interface_t * hi, u32 flags);
-
-int
-ssvm_eth_create (ssvm_eth_main_t * em, u8 * name, int is_master)
-{
-  ssvm_private_t *intfc;
-  void *oldheap;
-  clib_error_t *e;
-  svm_queue_t *q;
-  ssvm_shared_header_t *sh;
-  ssvm_eth_queue_elt_t *elts;
-  u32 *elt_indices;
-  u8 enet_addr[6];
-  int i, rv;
-
-  vec_add2 (em->intfcs, intfc, 1);
-
-  intfc->ssvm_size = em->segment_size;
-  intfc->i_am_master = 1;
-  intfc->name = name;
-  intfc->my_pid = getpid ();
-  if (is_master == 0)
-    {
-      rv = ssvm_slave_init (intfc, 20 /* timeout in seconds */ );
-      if (rv < 0)
-	return rv;
-      goto create_vnet_interface;
-    }
-
-  intfc->requested_va = em->next_base_va;
-  em->next_base_va += em->segment_size;
-  rv = ssvm_master_init (intfc, intfc - em->intfcs /* master index */ );
-
-  if (rv < 0)
-    return rv;
-
-  /* OK, segment created, set up queues and so forth.  */
-
-  sh = intfc->sh;
-  oldheap = ssvm_push_heap (sh);
-
-  q = svm_queue_init (em->queue_elts, sizeof (u32),
-		      0 /* consumer pid not interesting */ ,
-		      0 /* signal not sent */ );
-  sh->opaque[TO_MASTER_Q_INDEX] = (void *) q;
-  q = svm_queue_init (em->queue_elts, sizeof (u32),
-		      0 /* consumer pid not interesting */ ,
-		      0 /* signal not sent */ );
-  sh->opaque[TO_SLAVE_Q_INDEX] = (void *) q;
-
-  /*
-   * Preallocate the requested number of buffer chunks
-   * There must be a better way to do this, etc.
-   * Add some slop to avoid pool reallocation, which will not go well
-   */
-  elts = 0;
-  elt_indices = 0;
-
-  vec_validate_aligned (elts, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES);
-  vec_validate_aligned (elt_indices, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES);
-
-  for (i = 0; i < em->nbuffers; i++)
-    elt_indices[i] = i;
-
-  sh->opaque[CHUNK_POOL_INDEX] = (void *) elts;
-  sh->opaque[CHUNK_POOL_FREELIST_INDEX] = (void *) elt_indices;
-  sh->opaque[CHUNK_POOL_NFREE] = (void *) (uword) em->nbuffers;
-
-  ssvm_pop_heap (oldheap);
-
-create_vnet_interface:
-
-  sh = intfc->sh;
-
-  memset (enet_addr, 0, sizeof (enet_addr));
-  enet_addr[0] = 2;
-  enet_addr[1] = 0xFE;
-  enet_addr[2] = is_master;
-  enet_addr[5] = sh->master_index;
-
-  e = ethernet_register_interface
-    (em->vnet_main, ssvm_eth_device_class.index, intfc - em->intfcs,
-     /* ethernet address */ enet_addr,
-     &intfc->vlib_hw_if_index, ssvm_eth_flag_change);
-
-  if (e)
-    {
-      clib_error_report (e);
-      /* $$$$ unmap offending region? */
-      return VNET_API_ERROR_INVALID_INTERFACE;
-    }
-
-  /* Declare link up */
-  vnet_hw_interface_set_flags (em->vnet_main, intfc->vlib_hw_if_index,
-			       VNET_HW_INTERFACE_FLAG_LINK_UP);
-
-  /* Let the games begin... */
-  if (is_master)
-    sh->ready = 1;
-  return 0;
-}
-
-static clib_error_t *
-ssvm_config (vlib_main_t * vm, unformat_input_t * input)
-{
-  u8 *name;
-  int is_master = 1;
-  int i, rv;
-  ssvm_eth_main_t *em = &ssvm_eth_main;
-
-  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
-    {
-      if (unformat (input, "base-va %llx", &em->next_base_va))
-	;
-      else if (unformat (input, "segment-size %lld", &em->segment_size))
-	em->segment_size = 1ULL << (max_log2 (em->segment_size));
-      else if (unformat (input, "nbuffers %lld", &em->nbuffers))
-	;
-      else if (unformat (input, "queue-elts %lld", &em->queue_elts))
-	;
-      else if (unformat (input, "slave"))
-	is_master = 0;
-      else if (unformat (input, "%s", &name))
-	vec_add1 (em->names, name);
-      else
-	break;
-    }
-
-  /* No configured instances, we're done... */
-  if (vec_len (em->names) == 0)
-    return 0;
-
-  for (i = 0; i < vec_len (em->names); i++)
-    {
-      rv = ssvm_eth_create (em, em->names[i], is_master);
-      if (rv < 0)
-	return clib_error_return (0, "ssvm_eth_create '%s' failed, error %d",
-				  em->names[i], rv);
-    }
-
-  vlib_node_set_state (vm, ssvm_eth_input_node.index,
-		       VLIB_NODE_STATE_POLLING);
-
-  return 0;
-}
-
-VLIB_CONFIG_FUNCTION (ssvm_config, "ssvm_eth");
-
-
-static clib_error_t *
-ssvm_eth_init (vlib_main_t * vm)
-{
-  ssvm_eth_main_t *em = &ssvm_eth_main;
-
-  if (((sizeof (ssvm_eth_queue_elt_t) / CLIB_CACHE_LINE_BYTES)
-       * CLIB_CACHE_LINE_BYTES) != sizeof (ssvm_eth_queue_elt_t))
-    clib_warning ("ssvm_eth_queue_elt_t size %d not a multiple of %d",
-		  sizeof (ssvm_eth_queue_elt_t), CLIB_CACHE_LINE_BYTES);
-
-  em->vlib_main = vm;
-  em->vnet_main = vnet_get_main ();
-  em->elog_main = &vm->elog_main;
-
-  /* default config param values... */
-
-  em->next_base_va = 0x600000000ULL;
-  /*
-   * Allocate 2 full superframes in each dir (256 x 2 x 2 x 2048 bytes),
-   * 2mb; double that so we have plenty of space... 4mb
-   */
-  em->segment_size = 8 << 20;
-  em->nbuffers = 1024;
-  em->queue_elts = 512;
-  return 0;
-}
-
-VLIB_INIT_FUNCTION (ssvm_eth_init);
-
-static char *ssvm_eth_tx_func_error_strings[] = {
-#define _(n,s) s,
-  foreach_ssvm_eth_tx_func_error
-#undef _
-};
-
-static u8 *
-format_ssvm_eth_device_name (u8 * s, va_list * args)
-{
-  u32 i = va_arg (*args, u32);
-
-  s = format (s, "ssvmEthernet%d", i);
-  return s;
-}
-
-static u8 *
-format_ssvm_eth_device (u8 * s, va_list * args)
-{
-  s = format (s, "SSVM Ethernet");
-  return s;
-}
-
-static u8 *
-format_ssvm_eth_tx_trace (u8 * s, va_list * args)
-{
-  s = format (s, "Unimplemented...");
-  return s;
-}
-
-
-static uword
-ssvm_eth_interface_tx (vlib_main_t * vm,
-		       vlib_node_runtime_t * node, vlib_frame_t * f)
-{
-  ssvm_eth_main_t *em = &ssvm_eth_main;
-  vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
-  ssvm_private_t *intfc = vec_elt_at_index (em->intfcs, rd->dev_instance);
-  ssvm_shared_header_t *sh = intfc->sh;
-  svm_queue_t *q;
-  u32 *from;
-  u32 n_left;
-  ssvm_eth_queue_elt_t *elts, *elt, *prev_elt;
-  u32 my_pid = intfc->my_pid;
-  vlib_buffer_t *b0;
-  u32 bi0;
-  u32 size_this_buffer;
-  u32 chunks_this_buffer;
-  u8 i_am_master = intfc->i_am_master;
-  u32 elt_index;
-  int is_ring_full, interface_down;
-  int i;
-  volatile u32 *queue_lock;
-  u32 n_to_alloc = VLIB_FRAME_SIZE;
-  u32 n_allocated, n_present_in_cache, n_available;
-  u32 *elt_indices;
-
-  if (i_am_master)
-    q = (svm_queue_t *) sh->opaque[TO_SLAVE_Q_INDEX];
-  else
-    q = (svm_queue_t *) sh->opaque[TO_MASTER_Q_INDEX];
-
-  queue_lock = (u32 *) q;
-
-  from = vlib_frame_vector_args (f);
-  n_left = f->n_vectors;
-  is_ring_full = 0;
-  interface_down = 0;
-
-  n_present_in_cache = vec_len (em->chunk_cache);
-
-  /* admin / link up/down check */
-  if (sh->opaque[MASTER_ADMIN_STATE_INDEX] == 0 ||
-      sh->opaque[SLAVE_ADMIN_STATE_INDEX] == 0)
-    {
-      interface_down = 1;
-      goto out;
-    }
-
-  ssvm_lock (sh, my_pid, 1);
-
-  elts = (ssvm_eth_queue_elt_t *) (sh->opaque[CHUNK_POOL_INDEX]);
-  elt_indices = (u32 *) (sh->opaque[CHUNK_POOL_FREELIST_INDEX]);
-  n_available = (u32) pointer_to_uword (sh->opaque[CHUNK_POOL_NFREE]);
-
-  if (n_present_in_cache < n_left * 2)
-    {
-      vec_validate (em->chunk_cache, n_to_alloc + n_present_in_cache - 1);
-
-      n_allocated = n_to_alloc < n_available ? n_to_alloc : n_available;
-
-      if (PREDICT_TRUE (n_allocated > 0))
-	{
-	  clib_memcpy (&em->chunk_cache[n_present_in_cache],
-		       &elt_indices[n_available - n_allocated],
-		       sizeof (u32) * n_allocated);
-	}
-
-      n_present_in_cache += n_allocated;
-      n_available -= n_allocated;
-      sh->opaque[CHUNK_POOL_NFREE] = uword_to_pointer (n_available, void *);
-      _vec_len (em->chunk_cache) = n_present_in_cache;
-    }
-
-  ssvm_unlock (sh);
-
-  while (n_left)
-    {
-      bi0 = from[0];
-      b0 = vlib_get_buffer (vm, bi0);
-
-      size_this_buffer = vlib_buffer_length_in_chain (vm, b0);
-      chunks_this_buffer = (size_this_buffer + (SSVM_BUFFER_SIZE - 1))
-	/ SSVM_BUFFER_SIZE;
-
-      /* If we're not going to be able to enqueue the buffer, tail drop. */
-      if (q->cursize >= q->maxsize)
-	{
-	  is_ring_full = 1;
-	  break;
-	}
-
-      prev_elt = 0;
-      elt_index = ~0;
-      for (i = 0; i < chunks_this_buffer; i++)
-	{
-	  if (PREDICT_FALSE (n_present_in_cache == 0))
-	    goto out;
-
-	  elt_index = em->chunk_cache[--n_present_in_cache];
-	  elt = elts + elt_index;
-
-	  elt->type = SSVM_PACKET_TYPE;
-	  elt->flags = 0;
-	  elt->total_length_not_including_first_buffer =
-	    b0->total_length_not_including_first_buffer;
-	  elt->length_this_buffer = b0->current_length;
-	  elt->current_data_hint = b0->current_data;
-	  elt->owner = !i_am_master;
-	  elt->tag = 1;
-
-	  clib_memcpy (elt->data, b0->data + b0->current_data,
-		       b0->current_length);
-
-	  if (PREDICT_FALSE (prev_elt != 0))
-	    prev_elt->next_index = elt - elts;
-
-	  if (PREDICT_FALSE (i < (chunks_this_buffer - 1)))
-	    {
-	      elt->flags = SSVM_BUFFER_NEXT_PRESENT;
-	      ASSERT (b0->flags & VLIB_BUFFER_NEXT_PRESENT);
-	      b0 = vlib_get_buffer (vm, b0->next_buffer);
-	    }
-	  prev_elt = elt;
-	}
-
-      while (__sync_lock_test_and_set (queue_lock, 1))
-	;
-
-      svm_queue_add_raw (q, (u8 *) & elt_index);
-      CLIB_MEMORY_BARRIER ();
-      *queue_lock = 0;
-
-      from++;
-      n_left--;
-    }
-
-out:
-  if (PREDICT_FALSE (n_left))
-    {
-      if (is_ring_full)
-	vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_RING_FULL,
-			  n_left);
-      else if (interface_down)
-	vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_ADMIN_DOWN,
-			  n_left);
-      else
-	vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_NO_BUFFERS,
-			  n_left);
-
-      vlib_buffer_free (vm, from, n_left);
-    }
-  else
-    vlib_buffer_free (vm, vlib_frame_vector_args (f), f->n_vectors);
-
-  if (PREDICT_TRUE (vec_len (em->chunk_cache)))
-    _vec_len (em->chunk_cache) = n_present_in_cache;
-
-  return f->n_vectors;
-}
-
-static void
-ssvm_eth_clear_hw_interface_counters (u32 instance)
-{
-  /* Nothing for now */
-}
-
-static clib_error_t *
-ssvm_eth_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
-				  u32 flags)
-{
-  vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
-  uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
-  ssvm_eth_main_t *em = &ssvm_eth_main;
-  ssvm_private_t *intfc = vec_elt_at_index (em->intfcs, hif->dev_instance);
-  ssvm_shared_header_t *sh;
-
-  /* publish link-state in shared-memory, to discourage buffer-wasting */
-  sh = intfc->sh;
-  if (intfc->i_am_master)
-    sh->opaque[MASTER_ADMIN_STATE_INDEX] = (void *) is_up;
-  else
-    sh->opaque[SLAVE_ADMIN_STATE_INDEX] = (void *) is_up;
-
-  return 0;
-}
-
-static clib_error_t *
-ssvm_eth_subif_add_del_function (vnet_main_t * vnm,
-				 u32 hw_if_index,
-				 struct vnet_sw_interface_t *st, int is_add)
-{
-  /* Nothing for now */
-  return 0;
-}
-
-/*
- * Dynamically redirect all pkts from a specific interface
- * to the specified node
- */
-static void
-ssvm_eth_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
-				  u32 node_index)
-{
-  ssvm_eth_main_t *em = &ssvm_eth_main;
-  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
-  ssvm_private_t *intfc = pool_elt_at_index (em->intfcs, hw->dev_instance);
-
-  /* Shut off redirection */
-  if (node_index == ~0)
-    {
-      intfc->per_interface_next_index = node_index;
-      return;
-    }
-
-  intfc->per_interface_next_index =
-    vlib_node_add_next (em->vlib_main, ssvm_eth_input_node.index, node_index);
-}
-
-static u32
-ssvm_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
-{
-  /* nothing for now */
-  return 0;
-}
-
-/* *INDENT-OFF* */
-VNET_DEVICE_CLASS (ssvm_eth_device_class) = {
-  .name = "ssvm-eth",
-  .tx_function = ssvm_eth_interface_tx,
-  .tx_function_n_errors = SSVM_ETH_TX_N_ERROR,
-  .tx_function_error_strings = ssvm_eth_tx_func_error_strings,
-  .format_device_name = format_ssvm_eth_device_name,
-  .format_device = format_ssvm_eth_device,
-  .format_tx_trace = format_ssvm_eth_tx_trace,
-  .clear_counters = ssvm_eth_clear_hw_interface_counters,
-  .admin_up_down_function = ssvm_eth_interface_admin_up_down,
-  .subif_add_del_function = ssvm_eth_subif_add_del_function,
-  .rx_redirect_to_node = ssvm_eth_set_interface_next_node,
-};
-
-VLIB_DEVICE_TX_FUNCTION_MULTIARCH (ssvm_eth_device_class,
-				   ssvm_eth_interface_tx)
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */