src/vnet/crypto/node.c

   1 /*
   2  * Copyright (c) 2020 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <stdbool.h>
  17 #include <vlib/vlib.h>
  18 #include <vnet/crypto/crypto.h>
  19
  20 typedef enum
  21 {
  22 #define _(sym,str) VNET_CRYPTO_ASYNC_ERROR_##sym,
  23   foreach_crypto_op_status
  24 #undef _
  25     VNET_CRYPTO_ASYNC_N_ERROR,
  26 } vnet_crypto_async_error_t;
  27
  28 static char *vnet_crypto_async_error_strings[] = {
  29 #define _(sym,string) string,
  30   foreach_crypto_op_status
  31 #undef _
  32 };
  33
  34 #define foreach_crypto_dispatch_next \
  35   _(ERR_DROP, "error-drop")
  36
  37 typedef enum
  38 {
  39 #define _(n, s) CRYPTO_DISPATCH_NEXT_##n,
  40   foreach_crypto_dispatch_next
  41 #undef _
  42     CRYPTO_DISPATCH_N_NEXT,
  43 } crypto_dispatch_next_t;
  44
  45 typedef struct
  46 {
  47   vnet_crypto_op_status_t op_status;
  48   vnet_crypto_async_op_id_t op;
  49 } crypto_dispatch_trace_t;
  50
  51 static u8 *
  52 format_crypto_dispatch_trace (u8 * s, va_list * args)
  53 {
  54   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  55   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  56   crypto_dispatch_trace_t *t = va_arg (*args, crypto_dispatch_trace_t *);
  57
  58   s = format (s, "%U: %U", format_vnet_crypto_async_op, t->op,
  59               format_vnet_crypto_op_status, t->op_status);
  60   return s;
  61 }
  62
  63 static void
  64 vnet_crypto_async_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
  65                              vlib_buffer_t * b,
  66                              vnet_crypto_async_op_id_t op_id,
  67                              vnet_crypto_op_status_t status)
  68 {
  69   crypto_dispatch_trace_t *tr = vlib_add_trace (vm, node, b, sizeof (*tr));
  70   tr->op_status = status;
  71   tr->op = op_id;
  72 }
  73
  74 static_always_inline u32
  75 crypto_dequeue_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
  76                       vnet_crypto_thread_t * ct,
  77                       vnet_crypto_frame_dequeue_t * hdl, u32 n_cache,
  78                       u32 * n_total)
  79 {
  80   vnet_crypto_main_t *cm = &crypto_main;
  81   u32 n_elts = 0;
  82   u32 enqueue_thread_idx = ~0;
  83   vnet_crypto_async_frame_t *cf = (hdl) (vm, &n_elts, &enqueue_thread_idx);
  84   *n_total += n_elts;
  85
  86   while (cf || n_elts)
  87     {
  88       if (cf)
  89         {
  90           vec_validate (ct->buffer_indices, n_cache + cf->n_elts);
  91           vec_validate (ct->nexts, n_cache + cf->n_elts);
  92           clib_memcpy_fast (ct->buffer_indices + n_cache, cf->buffer_indices,
  93                             sizeof (u32) * cf->n_elts);
  94           if (cf->state == VNET_CRYPTO_FRAME_STATE_SUCCESS)
  95             {
  96               clib_memcpy_fast (ct->nexts + n_cache, cf->next_node_index,
  97                                 sizeof (u16) * cf->n_elts);
  98             }
  99           else
 100             {
 101               u32 i;
 102               for (i = 0; i < cf->n_elts; i++)
 103                 {
 104                   if (cf->elts[i].status != VNET_CRYPTO_OP_STATUS_COMPLETED)
 105                     {
 106                       ct->nexts[i + n_cache] = CRYPTO_DISPATCH_NEXT_ERR_DROP;
 107                       vlib_node_increment_counter (vm, node->node_index,
 108                                                    cf->elts[i].status, 1);
 109                     }
 110                   else
 111                     ct->nexts[i + n_cache] = cf->next_node_index[i];
 112                 }
 113             }
 114           n_cache += cf->n_elts;
 115           if (n_cache >= VLIB_FRAME_SIZE)
 116             {
 117               vlib_buffer_enqueue_to_next (vm, node, ct->buffer_indices,
 118                                            ct->nexts, n_cache);
 119               n_cache = 0;
 120             }
 121
 122           if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
 123             {
 124               u32 i;
 125
 126               for (i = 0; i < cf->n_elts; i++)
 127                 {
 128                   vlib_buffer_t *b = vlib_get_buffer (vm,
 129                                                       cf->buffer_indices[i]);
 130                   if (b->flags & VLIB_BUFFER_IS_TRACED)
 131                     vnet_crypto_async_add_trace (vm, node, b, cf->op,
 132                                                  cf->elts[i].status);
 133                 }
 134             }
 135           vnet_crypto_async_free_frame (vm, cf);
 136         }
 137       /* signal enqueue-thread to dequeue the processed frame (n_elts>0) */
 138       if (cm->dispatch_mode == VNET_CRYPTO_ASYNC_DISPATCH_INTERRUPT
 139           && n_elts > 0)
 140         {
 141           vlib_node_set_interrupt_pending (
 142             vlib_get_main_by_index (enqueue_thread_idx),
 143             cm->crypto_node_index);
 144         }
 145
 146       n_elts = 0;
 147       enqueue_thread_idx = 0;
 148       cf = (hdl) (vm, &n_elts, &enqueue_thread_idx);
 149       *n_total += n_elts;
 150     }
 151
 152   return n_cache;
 153 }
 154
 155 VLIB_NODE_FN (crypto_dispatch_node) (vlib_main_t * vm,
 156                                      vlib_node_runtime_t * node,
 157                                      vlib_frame_t * frame)
 158 {
 159   vnet_crypto_main_t *cm = &crypto_main;
 160   vnet_crypto_thread_t *ct = cm->threads + vm->thread_index;
 161   u32 n_dispatched = 0, n_cache = 0;
 162   u32 index;
 163
 164   /* *INDENT-OFF* */
 165   clib_bitmap_foreach (index, cm->async_active_ids)  {
 166     n_cache = crypto_dequeue_frame (vm, node, ct, cm->dequeue_handlers[index],
 167                                     n_cache, &n_dispatched);
 168   }
 169   /* *INDENT-ON* */
 170   if (n_cache)
 171     vlib_buffer_enqueue_to_next (vm, node, ct->buffer_indices, ct->nexts,
 172                                  n_cache);
 173
 174   return n_dispatched;
 175 }
 176
 177 /* *INDENT-OFF* */
 178 VLIB_REGISTER_NODE (crypto_dispatch_node) = {
 179   .name = "crypto-dispatch",
 180   .type = VLIB_NODE_TYPE_INPUT,
 181   .state = VLIB_NODE_STATE_DISABLED,
 182   .format_trace = format_crypto_dispatch_trace,
 183
 184   .n_errors = ARRAY_LEN(vnet_crypto_async_error_strings),
 185   .error_strings = vnet_crypto_async_error_strings,
 186
 187   .n_next_nodes = CRYPTO_DISPATCH_N_NEXT,
 188   .next_nodes = {
 189 #define _(n, s) \
 190   [CRYPTO_DISPATCH_NEXT_##n] = s,
 191       foreach_crypto_dispatch_next
 192 #undef _
 193   },
 194 };
 195 /* *INDENT-ON* */
 196
 197 /*
 198  * fd.io coding-style-patch-verification: ON
 199  *
 200  * Local Variables:
 201  * eval: (c-set-style "gnu")
 202  * End:
 203  */