FD.io VPP  v19.04.4-rc0-5-ge88582fac
Vector Packet Processing
virtio_api.c
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1 /*
2  *------------------------------------------------------------------
3  * virtio_api.c - vnet virtio pci device driver API support
4  *
5  * Copyright (c) 2018 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 
20 #include <vnet/vnet.h>
21 #include <vlibmemory/api.h>
22 
23 #include <vnet/interface.h>
24 #include <vnet/api_errno.h>
25 #include <vnet/ip/ip.h>
28 
29 #include <vnet/vnet_msg_enum.h>
30 
31 #define vl_typedefs /* define message structures */
32 #include <vnet/vnet_all_api_h.h>
33 #undef vl_typedefs
34 
35 #define vl_endianfun /* define message structures */
36 #include <vnet/vnet_all_api_h.h>
37 #undef vl_endianfun
38 
39 /* instantiate all the print functions we know about */
40 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
41 #define vl_printfun
42 #include <vnet/vnet_all_api_h.h>
43 #undef vl_printfun
44 
46 
47 #define foreach_virtio_pci_api_msg \
48 _(VIRTIO_PCI_CREATE, virtio_pci_create) \
49 _(VIRTIO_PCI_DELETE, virtio_pci_delete) \
50 _(SW_INTERFACE_VIRTIO_PCI_DUMP, sw_interface_virtio_pci_dump)
51 
52 static void
54 {
58  virtio_pci_create_if_args_t _a, *ap = &_a;
59 
60  clib_memset (ap, 0, sizeof (*ap));
61 
62  ap->addr = ntohl (mp->pci_addr);
63  if (!mp->use_random_mac)
64  {
65  clib_memcpy (ap->mac_addr, mp->mac_address, 6);
66  ap->mac_addr_set = 1;
67  }
68  ap->rxq_size = ntohs (mp->rx_ring_sz);
69  ap->txq_size = ntohs (mp->tx_ring_sz);
70  ap->sw_if_index = (u32) ~ 0;
71  ap->features = clib_net_to_host_u64 (mp->features);
72 
73  virtio_pci_create_if (vm, ap);
74 
76  if (!reg)
77  return;;
78 
79  rmp = vl_msg_api_alloc (sizeof (*rmp));
80  rmp->_vl_msg_id = htons (VL_API_VIRTIO_PCI_CREATE_REPLY);
81  rmp->context = mp->context;
82  rmp->retval = htonl (ap->rv);
83  rmp->sw_if_index = htonl (ap->sw_if_index);
84 
85  vl_api_send_msg (reg, (u8 *) rmp);
86 }
87 
88 static void
90 {
91  vnet_main_t *vnm = vnet_get_main ();
93  virtio_main_t *vim = &virtio_main;
94  int rv = 0;
96  virtio_if_t *vif;
97  vl_api_virtio_pci_delete_reply_t *rmp;
99 
100  hw =
102  htonl (mp->sw_if_index));
103  if (hw == NULL || virtio_device_class.index != hw->dev_class_index)
104  {
105  rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
106  goto reply;
107  }
108 
109  vif = pool_elt_at_index (vim->interfaces, hw->dev_instance);
110 
111  rv = virtio_pci_delete_if (vm, vif);
112 
113 reply:
115  if (!reg)
116  return;
117 
118  rmp = vl_msg_api_alloc (sizeof (*rmp));
119  rmp->_vl_msg_id = htons (VL_API_VIRTIO_PCI_DELETE_REPLY);
120  rmp->context = mp->context;
121  rmp->retval = htonl (rv);
122 
123  vl_api_send_msg (reg, (u8 *) rmp);
124 }
125 
126 static void
128  vl_api_registration_t * reg,
129  virtio_if_t * vif, u32 context)
130 {
132  mp = vl_msg_api_alloc (sizeof (*mp));
133 
134  clib_memset (mp, 0, sizeof (*mp));
135 
136  mp->_vl_msg_id = htons (VL_API_SW_INTERFACE_VIRTIO_PCI_DETAILS);
137  mp->pci_addr = htonl (vif->pci_addr.as_u32);
138  mp->sw_if_index = htonl (vif->sw_if_index);
139  virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, 0);
140  mp->rx_ring_sz = htons (vring->size);
141  vring = vec_elt_at_index (vif->txq_vrings, 0);
142  mp->tx_ring_sz = htons (vring->size);
143  clib_memcpy (mp->mac_addr, vif->mac_addr, 6);
144  mp->features = clib_host_to_net_u64 (vif->features);
145 
146  mp->context = context;
147  vl_api_send_msg (reg, (u8 *) mp);
148 }
149 
150 static void
153 {
156  virtio_main_t *vmx = &virtio_main;
157  virtio_if_t *vif;
158 
160  if (!reg)
161  return;
162 
163  pool_foreach (vif, vmx->interfaces, (
164  {
165  if (vif->type == VIRTIO_IF_TYPE_PCI)
166  {
167  virtio_pci_send_sw_interface_details
168  (am, reg, vif, mp->context);}
169  }
170  ));
171 }
172 
173 #define vl_msg_name_crc_list
174 #include <vnet/vnet_all_api_h.h>
175 #undef vl_msg_name_crc_list
176 
177 static void
179 {
180 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
181  foreach_vl_msg_name_crc_virtio;
182 #undef _
183 }
184 
185 static clib_error_t *
187 {
188  api_main_t *am = &api_main;
189 
190 #define _(N,n) \
191  vl_msg_api_set_handlers(VL_API_##N, #n, \
192  vl_api_##n##_t_handler, \
193  vl_noop_handler, \
194  vl_api_##n##_t_endian, \
195  vl_api_##n##_t_print, \
196  sizeof(vl_api_##n##_t), 1);
198 #undef _
199 
200  /*
201  * Set up the (msg_name, crc, message-id) table
202  */
204 
205  return 0;
206 }
207 
209 
210 /*
211  * fd.io coding-style-patch-verification: ON
212  *
213  * Local Variables:
214  * eval: (c-set-style "gnu")
215  * End:
216  */
virtio_if_t * interfaces
Definition: virtio.h:191
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
Reply for virtio pci create reply.
Definition: virtio.api:46
#define NULL
Definition: clib.h:58
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
static void vl_api_send_msg(vl_api_registration_t *rp, u8 *elem)
Definition: api.h:34
#define foreach_virtio_pci_api_msg
Definition: virtio_api.c:47
vnet_device_class_t virtio_device_class
Initialize a new virtio pci interface with the given paramters.
Definition: virtio.api:29
Dump virtio pci interfaces request.
Definition: virtio.api:66
void * vl_msg_api_alloc(int nbytes)
Delete virtio pci interface.
Definition: virtio.api:58
unsigned char u8
Definition: types.h:56
void virtio_pci_create_if(vlib_main_t *vm, virtio_pci_create_if_args_t *args)
Definition: pci.c:989
VLIB_API_INIT_FUNCTION(virtio_pci_api_hookup)
static clib_error_t * virtio_pci_api_hookup(vlib_main_t *vm)
Definition: virtio_api.c:186
#define clib_memcpy(d, s, n)
Definition: string.h:180
u32 as_u32
Definition: virtio.h:131
u64 features
Definition: virtio.h:163
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:493
static void virtio_pci_send_sw_interface_details(vpe_api_main_t *am, vl_api_registration_t *reg, virtio_if_t *vif, u32 context)
Definition: virtio_api.c:127
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
unsigned int u32
Definition: types.h:88
static void vl_api_virtio_pci_delete_t_handler(vl_api_virtio_pci_delete_t *mp)
Definition: virtio_api.c:89
static void setup_message_id_table(api_main_t *am)
Definition: virtio_api.c:178
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
static void vl_api_virtio_pci_create_t_handler(vl_api_virtio_pci_create_t *mp)
Definition: virtio_api.c:53
pci_addr_t pci_addr
Definition: virtio.h:148
API main structure, used by both vpp and binary API clients.
Definition: api_common.h:202
An API client registration, only in vpp/vlib.
Definition: api_common.h:45
virtio_vring_t * rxq_vrings
Definition: virtio.h:161
Reply for virtio pci interface dump request.
Definition: virtio.api:81
vlib_main_t * vm
Definition: buffer.c:312
static vnet_hw_interface_t * vnet_get_sup_hw_interface_api_visible_or_null(vnet_main_t *vnm, u32 sw_if_index)
u32 context
Definition: ipsec_gre.api:33
u8 mac_addr[6]
Definition: virtio.h:172
static void vl_api_sw_interface_virtio_pci_dump_t_handler(vl_api_sw_interface_virtio_pci_dump_t *mp)
Definition: virtio_api.c:152
static vl_api_registration_t * vl_api_client_index_to_registration(u32 index)
Definition: api.h:56
int virtio_pci_delete_if(vlib_main_t *vm, virtio_if_t *vif)
Definition: pci.c:1186
virtio_main_t virtio_main
Definition: virtio.c:37
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
u32 sw_if_index
Definition: virtio.h:141
vpe_api_main_t vpe_api_main
Definition: interface_api.c:49
api_main_t api_main
Definition: api_shared.c:35
virtio_vring_t * txq_vrings
Definition: virtio.h:162