1 /* SPDX-License-Identifier: BSD-3-Clause
2 *
3 * Copyright(c) 2019-2020 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_STATS_UPDATE_PERIOD_MS,
26 SFC_KVARG_PERF_PROFILE,
27 SFC_KVARG_RX_DATAPATH,
28 SFC_KVARG_TX_DATAPATH,
29 SFC_KVARG_FW_VARIANT,
30 SFC_KVARG_RXD_WAIT_TIMEOUT_NS,
31 NULL,
32 };
33
34 if (devargs == NULL)
35 return 0;
36
37 sa->kvargs = rte_kvargs_parse(devargs->args, params);
38 if (sa->kvargs == NULL)
39 return EINVAL;
40
41 return 0;
42 }
43
44 void
sfc_kvargs_cleanup(struct sfc_adapter * sa)45 sfc_kvargs_cleanup(struct sfc_adapter *sa)
46 {
47 rte_kvargs_free(sa->kvargs);
48 }
49
50 static int
sfc_kvarg_match_value(const char * value,const char * const * values,unsigned int n_values)51 sfc_kvarg_match_value(const char *value, const char * const *values,
52 unsigned int n_values)
53 {
54 unsigned int i;
55
56 for (i = 0; i < n_values; ++i)
57 if (strcasecmp(value, values[i]) == 0)
58 return 1;
59
60 return 0;
61 }
62
63 int
sfc_kvargs_process(struct sfc_adapter * sa,const char * key_match,arg_handler_t handler,void * opaque_arg)64 sfc_kvargs_process(struct sfc_adapter *sa, const char *key_match,
65 arg_handler_t handler, void *opaque_arg)
66 {
67 if (sa->kvargs == NULL)
68 return 0;
69
70 return -rte_kvargs_process(sa->kvargs, key_match, handler, opaque_arg);
71 }
72
73 int
sfc_kvarg_bool_handler(__rte_unused const char * key,const char * value_str,void * opaque)74 sfc_kvarg_bool_handler(__rte_unused const char *key,
75 const char *value_str, void *opaque)
76 {
77 const char * const true_strs[] = {
78 "1", "y", "yes", "on", "true"
79 };
80 const char * const false_strs[] = {
81 "0", "n", "no", "off", "false"
82 };
83 bool *value = opaque;
84
85 if (sfc_kvarg_match_value(value_str, true_strs,
86 RTE_DIM(true_strs)))
87 *value = true;
88 else if (sfc_kvarg_match_value(value_str, false_strs,
89 RTE_DIM(false_strs)))
90 *value = false;
91 else
92 return -EINVAL;
93
94 return 0;
95 }
96
97 int
sfc_kvarg_long_handler(__rte_unused const char * key,const char * value_str,void * opaque)98 sfc_kvarg_long_handler(__rte_unused const char *key,
99 const char *value_str, void *opaque)
100 {
101 long value;
102 char *endptr;
103
104 if (!value_str || !opaque)
105 return -EINVAL;
106
107 value = strtol(value_str, &endptr, 0);
108 if (endptr == value_str)
109 return -EINVAL;
110
111 *(long *)opaque = value;
112
113 return 0;
114 }
115
116 int
sfc_kvarg_string_handler(__rte_unused const char * key,const char * value_str,void * opaque)117 sfc_kvarg_string_handler(__rte_unused const char *key,
118 const char *value_str, void *opaque)
119 {
120 *(const char **)opaque = value_str;
121
122 return 0;
123 }
124