1 /* SPDX-License-Identifier: BSD-3-Clause
2 *
3 * Copyright(c) 2019-2021 Xilinx, Inc.
4 * Copyright(c) 2016-2019 Solarflare Communications Inc.
5 *
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
8 */
9
10 #include <stdbool.h>
11 #include <strings.h>
12
13 #include <rte_devargs.h>
14 #include <rte_kvargs.h>
15
16 #include "sfc.h"
17 #include "sfc_kvargs.h"
18
19 int
sfc_kvargs_parse(struct sfc_adapter * sa)20 sfc_kvargs_parse(struct sfc_adapter *sa)
21 {
22 struct rte_eth_dev *eth_dev = (sa)->eth_dev;
23 struct rte_devargs *devargs = eth_dev->device->devargs;
24 const char **params = (const char *[]){
25 SFC_KVARG_SWITCH_MODE,
26 SFC_KVARG_REPRESENTOR,
27 SFC_KVARG_STATS_UPDATE_PERIOD_MS,
28 SFC_KVARG_PERF_PROFILE,
29 SFC_KVARG_RX_DATAPATH,
30 SFC_KVARG_TX_DATAPATH,
31 SFC_KVARG_FW_VARIANT,
32 SFC_KVARG_RXD_WAIT_TIMEOUT_NS,
33 RTE_DEVARGS_KEY_CLASS,
34 NULL,
35 };
36
37 if (devargs == NULL)
38 return 0;
39
40 sa->kvargs = rte_kvargs_parse(devargs->args, params);
41 if (sa->kvargs == NULL)
42 return EINVAL;
43
44 return 0;
45 }
46
47 void
sfc_kvargs_cleanup(struct sfc_adapter * sa)48 sfc_kvargs_cleanup(struct sfc_adapter *sa)
49 {
50 rte_kvargs_free(sa->kvargs);
51 }
52
53 static int
sfc_kvarg_match_value(const char * value,const char * const * values,unsigned int n_values)54 sfc_kvarg_match_value(const char *value, const char * const *values,
55 unsigned int n_values)
56 {
57 unsigned int i;
58
59 for (i = 0; i < n_values; ++i)
60 if (strcasecmp(value, values[i]) == 0)
61 return 1;
62
63 return 0;
64 }
65
66 int
sfc_kvargs_process(struct sfc_adapter * sa,const char * key_match,arg_handler_t handler,void * opaque_arg)67 sfc_kvargs_process(struct sfc_adapter *sa, const char *key_match,
68 arg_handler_t handler, void *opaque_arg)
69 {
70 if (sa->kvargs == NULL)
71 return 0;
72
73 return -rte_kvargs_process(sa->kvargs, key_match, handler, opaque_arg);
74 }
75
76 int
sfc_kvarg_bool_handler(__rte_unused const char * key,const char * value_str,void * opaque)77 sfc_kvarg_bool_handler(__rte_unused const char *key,
78 const char *value_str, void *opaque)
79 {
80 const char * const true_strs[] = {
81 "1", "y", "yes", "on", "true"
82 };
83 const char * const false_strs[] = {
84 "0", "n", "no", "off", "false"
85 };
86 bool *value = opaque;
87
88 if (sfc_kvarg_match_value(value_str, true_strs,
89 RTE_DIM(true_strs)))
90 *value = true;
91 else if (sfc_kvarg_match_value(value_str, false_strs,
92 RTE_DIM(false_strs)))
93 *value = false;
94 else
95 return -EINVAL;
96
97 return 0;
98 }
99
100 int
sfc_kvarg_long_handler(__rte_unused const char * key,const char * value_str,void * opaque)101 sfc_kvarg_long_handler(__rte_unused const char *key,
102 const char *value_str, void *opaque)
103 {
104 long value;
105 char *endptr;
106
107 if (!value_str || !opaque)
108 return -EINVAL;
109
110 value = strtol(value_str, &endptr, 0);
111 if (endptr == value_str)
112 return -EINVAL;
113
114 *(long *)opaque = value;
115
116 return 0;
117 }
118
119 int
sfc_kvarg_string_handler(__rte_unused const char * key,const char * value_str,void * opaque)120 sfc_kvarg_string_handler(__rte_unused const char *key,
121 const char *value_str, void *opaque)
122 {
123 *(const char **)opaque = value_str;
124
125 return 0;
126 }
127