USRP Hardware Driver and USRP Manual  Version: 4.6.0.0
UHD and USRP Manual
vrt_if_packet.hpp
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1 //
2 // Copyright 2010-2014 Ettus Research LLC
3 // Copyright 2018 Ettus Research, a National Instruments Company
4 //
5 // SPDX-License-Identifier: GPL-3.0-or-later
6 //
7 
8 #pragma once
9 
10 #include <uhd/config.hpp>
11 #include <stdint.h>
12 #include <cstddef> //size_t
13 
14 namespace uhd { namespace transport { namespace vrt {
15 
17 static const size_t num_vrl_words32 = 3;
18 
20 static const size_t max_if_hdr_words32 = 7; // hdr+sid+cid+tsi+tsf
21 
28 {
29  if_packet_info_t(void);
30 
31  // link layer type - always set for pack and unpack
32  enum link_type_t {
33  LINK_TYPE_NONE = 0x0,
34  LINK_TYPE_CHDR = 0x1,
35  LINK_TYPE_VRLP = 0x2
36  } link_type;
37 
38  // packet type
40  // VRT language:
41  PACKET_TYPE_DATA = 0x0,
42  PACKET_TYPE_IF_EXT = 0x1,
43  PACKET_TYPE_CONTEXT = 0x2, // extension context: has_sid = true
44 
45  // CHDR language:
46  // PACKET_TYPE_DATA = 0x0, // Data
47  PACKET_TYPE_FC = 0x1, // Flow control
48  PACKET_TYPE_ACK = 0x1, // Flow control (ack)
49  PACKET_TYPE_CMD = 0x2, // Command
50  PACKET_TYPE_RESP = 0x3, // Command response
51  PACKET_TYPE_ERROR =
52  0x3 // Command response: Error (the EOB bit is raised in this case)
53  } packet_type;
54 
55  // size fields
56  size_t num_payload_words32; // required in pack, derived in unpack
57  size_t num_payload_bytes; // required in pack, derived in unpack
58  size_t num_header_words32; // derived in pack, derived in unpack
59  size_t num_packet_words32; // derived in pack, required in unpack
60 
61  // header fields
62  size_t packet_count;
64  bool sob, eob;
66  bool error;
68  bool fc_ack;
69 
70  // optional fields
72  bool has_sid;
73  uint32_t sid;
75  bool has_cid;
76  uint64_t cid;
78  bool has_tsi;
79  uint32_t tsi;
81  bool has_tsf;
82  uint64_t tsf;
84  bool has_tlr;
85  uint32_t tlr;
86 };
87 
113 UHD_API void if_hdr_pack_be(uint32_t* packet_buff, if_packet_info_t& if_packet_info);
114 
149  const uint32_t* packet_buff, if_packet_info_t& if_packet_info);
150 
159 UHD_API void if_hdr_pack_le(uint32_t* packet_buff, if_packet_info_t& if_packet_info);
160 
170  const uint32_t* packet_buff, if_packet_info_t& if_packet_info);
171 
173  : link_type(LINK_TYPE_NONE)
174  , packet_type(PACKET_TYPE_DATA)
175  , num_payload_words32(0)
176  , num_payload_bytes(0)
177  , num_header_words32(0)
178  , num_packet_words32(0)
179  , packet_count(0)
180  , sob(false)
181  , eob(false)
182  , error(false)
183  , fc_ack(false)
184  , has_sid(false)
185  , sid(0)
186  , has_cid(false)
187  , cid(0)
188  , has_tsi(false)
189  , tsi(0)
190  , has_tsf(false)
191  , tsf(0)
192  , has_tlr(false)
193  , tlr(0)
194 {
195 }
196 
197 }}} // namespace uhd::transport::vrt
uint64_t cid
Definition: vrt_if_packet.hpp:76
Definition: vrt_if_packet.hpp:27
size_t num_packet_words32
Definition: vrt_if_packet.hpp:59
UHD_API void if_hdr_unpack_le(const uint32_t *packet_buff, if_packet_info_t &if_packet_info)
if_packet_info_t(void)
Definition: vrt_if_packet.hpp:172
packet_type_t
Definition: vrt_if_packet.hpp:39
uint64_t tsf
Definition: vrt_if_packet.hpp:82
UHD_API void if_hdr_unpack_be(const uint32_t *packet_buff, if_packet_info_t &if_packet_info)
bool has_cid
Class ID.
Definition: vrt_if_packet.hpp:75
link_type_t
Definition: vrt_if_packet.hpp:32
uint32_t tlr
Definition: vrt_if_packet.hpp:85
Definition: build_info.hpp:12
uint32_t sid
Definition: vrt_if_packet.hpp:73
UHD_API void if_hdr_pack_be(uint32_t *packet_buff, if_packet_info_t &if_packet_info)
bool error
This is asserted for command responses that are errors (CHDR only)
Definition: vrt_if_packet.hpp:66
size_t num_payload_bytes
Definition: vrt_if_packet.hpp:57
bool has_tsi
Integer timestamp.
Definition: vrt_if_packet.hpp:78
#define UHD_INLINE
Definition: config.h:65
bool has_tsf
Fractional timestamp.
Definition: vrt_if_packet.hpp:81
Definition: log.hpp:121
size_t packet_count
Definition: vrt_if_packet.hpp:62
#define UHD_API
Definition: config.h:87
bool has_sid
Stream ID (SID).
Definition: vrt_if_packet.hpp:72
size_t num_payload_words32
Definition: vrt_if_packet.hpp:56
bool fc_ack
This is asserted for flow control packets are ACKS (CHDR only)
Definition: vrt_if_packet.hpp:68
UHD_API void if_hdr_pack_le(uint32_t *packet_buff, if_packet_info_t &if_packet_info)
bool has_tlr
Trailer.
Definition: vrt_if_packet.hpp:84
size_t num_header_words32
Definition: vrt_if_packet.hpp:58
bool sob
Asserted for start- or end-of-burst.
Definition: vrt_if_packet.hpp:64
uint32_t tsi
Definition: vrt_if_packet.hpp:79