Switchtec Userspace PROJECT_NUMBER = 4.0
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gas_mrpc.h
1/*
2 * Microsemi Switchtec(tm) PCIe Management Library
3 * Copyright (c) 2019, Microsemi Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 */
24
25#ifndef LIBSWITCHTEC_GAS_MRPC_H
26#define LIBSWITCHTEC_GAS_MRPC_H
27
28#include <switchtec/mrpc.h>
29#include <switchtec/switchtec.h>
30#include <stdint.h>
31#include <switchtec/endian.h>
32
34 uint32_t gas_offset;
35 uint32_t len;
36 uint8_t data[MRPC_MAX_DATA_LEN - 2 * sizeof(uint32_t)];
37};
38
40 uint32_t gas_offset;
41 uint32_t len;
42};
43
44void gas_mrpc_memcpy_to_gas(struct switchtec_dev *dev, void __gas *dest,
45 const void *src, size_t n);
46int gas_mrpc_memcpy_from_gas(struct switchtec_dev *dev, void *dest,
47 const void __gas *src, size_t n);
48ssize_t gas_mrpc_write_from_gas(struct switchtec_dev *dev, int fd,
49 const void __gas *src, size_t n);
50
51// noop conversion functions to make macros below work
52static inline uint8_t le8toh(uint8_t x) { return x; }
53static inline uint8_t htole8(uint8_t x) { return x; }
54
55#define create_mrpc_gas_read(type, suffix) \
56 static inline int gas_mrpc_read ## suffix(struct switchtec_dev *dev, \
57 type __gas *addr, \
58 type *data) \
59 { \
60 int ret; \
61 ret = gas_mrpc_memcpy_from_gas(dev, data, addr, \
62 sizeof(type)); \
63 *data = le##suffix##toh(*data); \
64 return ret; \
65 }
66
67#define create_mrpc_gas_write(type, suffix) \
68 static inline void gas_mrpc_write ## suffix(struct switchtec_dev *dev, \
69 type val, type __gas *addr) \
70 { \
71 val = htole##suffix (val); \
72 gas_mrpc_memcpy_to_gas(dev, addr, &val, sizeof(val)); \
73 }
74
75create_mrpc_gas_read(uint8_t, 8);
76create_mrpc_gas_read(uint16_t, 16);
77create_mrpc_gas_read(uint32_t, 32);
78create_mrpc_gas_read(uint64_t, 64);
79
80create_mrpc_gas_write(uint8_t, 8);
81create_mrpc_gas_write(uint16_t, 16);
82create_mrpc_gas_write(uint32_t, 32);
83create_mrpc_gas_write(uint64_t, 64);
84
85#undef create_mrpc_gas_read
86#undef create_mrpc_gas_write
87
88#endif
void gas_mrpc_memcpy_to_gas(struct switchtec_dev *dev, void __gas *dest, const void *src, size_t n)
Copy data to the GAS using MRPC commands.
Definition: gas_mrpc.c:59
int gas_mrpc_memcpy_from_gas(struct switchtec_dev *dev, void *dest, const void __gas *src, size_t n)
Copy data from the GAS using MRPC commands.
Definition: gas_mrpc.c:94
ssize_t gas_mrpc_write_from_gas(struct switchtec_dev *dev, int fd, const void __gas *src, size_t n)
Call write() with data from the GAS using an MRPC command.
Definition: gas_mrpc.c:131
Main Switchtec header.