1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Gaëtan Rivet
3 */
4
5 #include "rte_ethdev.h"
6 #include "rte_ethdev_driver.h"
7 #include "ethdev_private.h"
8
9 uint16_t
eth_dev_to_id(const struct rte_eth_dev * dev)10 eth_dev_to_id(const struct rte_eth_dev *dev)
11 {
12 if (dev == NULL)
13 return RTE_MAX_ETHPORTS;
14 return dev - rte_eth_devices;
15 }
16
17 struct rte_eth_dev *
eth_find_device(const struct rte_eth_dev * start,rte_eth_cmp_t cmp,const void * data)18 eth_find_device(const struct rte_eth_dev *start, rte_eth_cmp_t cmp,
19 const void *data)
20 {
21 struct rte_eth_dev *edev;
22 ptrdiff_t idx;
23
24 /* Avoid Undefined Behaviour */
25 if (start != NULL &&
26 (start < &rte_eth_devices[0] ||
27 start > &rte_eth_devices[RTE_MAX_ETHPORTS]))
28 return NULL;
29 if (start != NULL)
30 idx = eth_dev_to_id(start) + 1;
31 else
32 idx = 0;
33 for (; idx < RTE_MAX_ETHPORTS; idx++) {
34 edev = &rte_eth_devices[idx];
35 if (cmp(edev, data) == 0)
36 return edev;
37 }
38 return NULL;
39 }
40
41 int
rte_eth_devargs_parse_list(char * str,rte_eth_devargs_callback_t callback,void * data)42 rte_eth_devargs_parse_list(char *str, rte_eth_devargs_callback_t callback,
43 void *data)
44 {
45 char *str_start;
46 int state;
47 int result;
48
49 if (*str != '[')
50 /* Single element, not a list */
51 return callback(str, data);
52
53 /* Sanity check, then strip the brackets */
54 str_start = &str[strlen(str) - 1];
55 if (*str_start != ']') {
56 RTE_LOG(ERR, EAL, "(%s): List does not end with ']'\n", str);
57 return -EINVAL;
58 }
59 str++;
60 *str_start = '\0';
61
62 /* Process list elements */
63 state = 0;
64 while (1) {
65 if (state == 0) {
66 if (*str == '\0')
67 break;
68 if (*str != ',') {
69 str_start = str;
70 state = 1;
71 }
72 } else if (state == 1) {
73 if (*str == ',' || *str == '\0') {
74 if (str > str_start) {
75 /* Non-empty string fragment */
76 *str = '\0';
77 result = callback(str_start, data);
78 if (result < 0)
79 return result;
80 }
81 state = 0;
82 }
83 }
84 str++;
85 }
86 return 0;
87 }
88
89 static int
rte_eth_devargs_process_range(char * str,uint16_t * list,uint16_t * len_list,const uint16_t max_list)90 rte_eth_devargs_process_range(char *str, uint16_t *list, uint16_t *len_list,
91 const uint16_t max_list)
92 {
93 uint16_t lo, hi, val;
94 int result;
95
96 result = sscanf(str, "%hu-%hu", &lo, &hi);
97 if (result == 1) {
98 if (*len_list >= max_list)
99 return -ENOMEM;
100 list[(*len_list)++] = lo;
101 } else if (result == 2) {
102 if (lo >= hi || lo > RTE_MAX_ETHPORTS || hi > RTE_MAX_ETHPORTS)
103 return -EINVAL;
104 for (val = lo; val <= hi; val++) {
105 if (*len_list >= max_list)
106 return -ENOMEM;
107 list[(*len_list)++] = val;
108 }
109 } else
110 return -EINVAL;
111 return 0;
112 }
113
114 int
rte_eth_devargs_parse_representor_ports(char * str,void * data)115 rte_eth_devargs_parse_representor_ports(char *str, void *data)
116 {
117 struct rte_eth_devargs *eth_da = data;
118
119 return rte_eth_devargs_process_range(str, eth_da->representor_ports,
120 ð_da->nb_representor_ports, RTE_MAX_ETHPORTS);
121 }
122