src/vnet/devices/devices.h

   1 /*
   2  * Copyright (c) 2016 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 #ifndef included_vnet_vnet_device_h
  17 #define included_vnet_vnet_device_h
  18
  19 #include <vppinfra/pcap.h>
  20 #include <vnet/l3_types.h>
  21
  22 typedef enum
  23 {
  24   VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT,
  25   VNET_DEVICE_INPUT_NEXT_IP4_INPUT,
  26   VNET_DEVICE_INPUT_NEXT_IP6_INPUT,
  27   VNET_DEVICE_INPUT_NEXT_MPLS_INPUT,
  28   VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT,
  29   VNET_DEVICE_INPUT_NEXT_DROP,
  30   VNET_DEVICE_INPUT_N_NEXT_NODES,
  31 } vnet_device_input_next_t;
  32
  33 #define VNET_DEVICE_INPUT_NEXT_NODES {                                  \
  34     [VNET_DEVICE_INPUT_NEXT_DROP] = "error-drop",                       \
  35     [VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",         \
  36     [VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT] = "ip4-input-no-checksum",   \
  37     [VNET_DEVICE_INPUT_NEXT_IP4_INPUT] = "ip4-input",                   \
  38     [VNET_DEVICE_INPUT_NEXT_IP6_INPUT] = "ip6-input",                   \
  39     [VNET_DEVICE_INPUT_NEXT_MPLS_INPUT] = "mpls-input",                 \
  40 }
  41
  42 typedef struct
  43 {
  44   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  45
  46   /* total input packet counter */
  47   u64 aggregate_rx_packets;
  48 } vnet_device_per_worker_data_t;
  49
  50 typedef struct
  51 {
  52   vnet_device_per_worker_data_t *workers;
  53   uword first_worker_thread_index;
  54   uword last_worker_thread_index;
  55   uword next_worker_thread_index;
  56 } vnet_device_main_t;
  57
  58 typedef struct
  59 {
  60   u32 hw_if_index;
  61   u32 dev_instance;
  62   u16 queue_id;
  63   vnet_hw_if_rx_mode mode;
  64   u32 interrupt_pending;
  65 } vnet_device_and_queue_t;
  66
  67 typedef struct
  68 {
  69   vnet_device_and_queue_t *devices_and_queues;
  70   vlib_node_state_t enabled_node_state;
  71   u32 pad;
  72 } vnet_device_input_runtime_t;
  73
  74 extern vnet_device_main_t vnet_device_main;
  75 extern vlib_node_registration_t device_input_node;
  76 extern const u32 device_input_next_node_advance[];
  77 extern const u32 device_input_next_node_flags[];
  78
  79 static inline void
  80 vnet_hw_interface_set_input_node (vnet_main_t * vnm, u32 hw_if_index,
  81                                   u32 node_index)
  82 {
  83   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
  84   hw->input_node_index = node_index;
  85 }
  86
  87 void vnet_hw_interface_assign_rx_thread (vnet_main_t * vnm, u32 hw_if_index,
  88                                          u16 queue_id, uword thread_index);
  89 int vnet_hw_interface_unassign_rx_thread (vnet_main_t * vnm, u32 hw_if_index,
  90                                           u16 queue_id);
  91 int vnet_hw_interface_set_rx_mode (vnet_main_t * vnm, u32 hw_if_index,
  92                                    u16 queue_id, vnet_hw_if_rx_mode mode);
  93 int vnet_hw_interface_get_rx_mode (vnet_main_t * vnm, u32 hw_if_index,
  94                                    u16 queue_id, vnet_hw_if_rx_mode * mode);
  95
  96 static inline u64
  97 vnet_get_aggregate_rx_packets (void)
  98 {
  99   vnet_device_main_t *vdm = &vnet_device_main;
 100   u64 sum = 0;
 101   vnet_device_per_worker_data_t *pwd;
 102
 103   vec_foreach (pwd, vdm->workers) sum += pwd->aggregate_rx_packets;
 104
 105   return sum;
 106 }
 107
 108 static inline void
 109 vnet_device_increment_rx_packets (u32 thread_index, u64 count)
 110 {
 111   vnet_device_main_t *vdm = &vnet_device_main;
 112   vnet_device_per_worker_data_t *pwd;
 113
 114   pwd = vec_elt_at_index (vdm->workers, thread_index);
 115   pwd->aggregate_rx_packets += count;
 116 }
 117
 118 static_always_inline uword
 119 vnet_get_device_input_thread_index (vnet_main_t * vnm, u32 hw_if_index,
 120                                     u16 queue_id)
 121 {
 122   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
 123   ASSERT (queue_id < vec_len (hw->input_node_thread_index_by_queue));
 124   return hw->input_node_thread_index_by_queue[queue_id];
 125 }
 126
 127 static_always_inline void
 128 vnet_device_input_set_interrupt_pending (vnet_main_t * vnm, u32 hw_if_index,
 129                                          u16 queue_id)
 130 {
 131   vlib_main_t *vm;
 132   vnet_hw_interface_t *hw;
 133   vnet_device_input_runtime_t *rt;
 134   vnet_device_and_queue_t *dq;
 135   uword idx;
 136
 137   hw = vnet_get_hw_interface (vnm, hw_if_index);
 138   idx = vnet_get_device_input_thread_index (vnm, hw_if_index, queue_id);
 139   vm = vlib_mains[idx];
 140   rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
 141   idx = hw->dq_runtime_index_by_queue[queue_id];
 142   dq = vec_elt_at_index (rt->devices_and_queues, idx);
 143
 144   clib_atomic_store_rel_n (&(dq->interrupt_pending), 1);
 145
 146   vlib_node_set_interrupt_pending (vm, hw->input_node_index);
 147 }
 148
 149 /*
 150  * Acquire RMW Access
 151  * Paired with Release Store in vnet_device_input_set_interrupt_pending
 152  */
 153 #define foreach_device_and_queue(var,vec)                       \
 154   for (var = (vec); var < vec_end (vec); var++)                 \
 155     if ((var->mode == VNET_HW_IF_RX_MODE_POLLING)               \
 156         || clib_atomic_swap_acq_n (&((var)->interrupt_pending), 0))
 157
 158 #endif /* included_vnet_vnet_device_h */
 159
 160 /*
 161  * fd.io coding-style-patch-verification: ON
 162  *
 163  * Local Variables:
 164  * eval: (c-set-style "gnu")
 165  * End:
 166  */