diff options
| -rw-r--r-- | common/Makefile | 1 | ||||
| -rw-r--r-- | common/cmd_ethsw.c | 347 | ||||
| -rw-r--r-- | include/ethsw.h | 48 |
3 files changed, 396 insertions, 0 deletions
diff --git a/common/Makefile b/common/Makefile index 556fb07..491c565 100644 --- a/common/Makefile +++ b/common/Makefile @@ -214,6 +214,7 @@ obj-$(CONFIG_DFU_TFTP) += update.o obj-$(CONFIG_USB_KEYBOARD) += usb_kbd.o obj-$(CONFIG_CMD_DFU) += cmd_dfu.o obj-$(CONFIG_CMD_GPT) += cmd_gpt.o +obj-$(CONFIG_CMD_ETHSW) += cmd_ethsw.o # Power obj-$(CONFIG_CMD_PMIC) += cmd_pmic.o diff --git a/common/cmd_ethsw.c b/common/cmd_ethsw.c new file mode 100644 index 0000000..9a7ae74 --- /dev/null +++ b/common/cmd_ethsw.c @@ -0,0 +1,347 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + * + * Ethernet Switch commands + */ + +#include <common.h> +#include <command.h> +#include <errno.h> +#include <ethsw.h> + +static const char *ethsw_name; + +static struct keywords_to_function { + enum ethsw_keyword_id cmd_keyword[ETHSW_MAX_CMD_PARAMS]; + int cmd_func_offset; + int (*keyword_function)(struct ethsw_command_def *parsed_cmd); +} ethsw_cmd_def[] = { + { + .cmd_keyword = { + ethsw_id_enable, + ethsw_id_key_end, + }, + .cmd_func_offset = offsetof(struct ethsw_command_func, + port_enable), + .keyword_function = NULL, + }, { + .cmd_keyword = { + ethsw_id_disable, + ethsw_id_key_end, + }, + .cmd_func_offset = offsetof(struct ethsw_command_func, + port_disable), + .keyword_function = NULL, + }, { + .cmd_keyword = { + ethsw_id_show, + ethsw_id_key_end, + }, + .cmd_func_offset = offsetof(struct ethsw_command_func, + port_show), + .keyword_function = NULL, + }, +}; + +struct keywords_optional { + int cmd_keyword[ETHSW_MAX_CMD_PARAMS]; +} cmd_opt_def[] = { + { + .cmd_keyword = { + ethsw_id_port, + ethsw_id_port_no, + ethsw_id_key_end, + }, + }, +}; + +static int keyword_match_gen(enum ethsw_keyword_id key_id, int argc, char + *const argv[], int *argc_nr, + struct ethsw_command_def *parsed_cmd); +static int keyword_match_port(enum ethsw_keyword_id key_id, int argc, + char *const argv[], int *argc_nr, + struct ethsw_command_def *parsed_cmd); + +/* + * Define properties for each keyword; + * keep the order synced with enum ethsw_keyword_id + */ +struct keyword_def { + const char *keyword_name; + int (*match)(enum ethsw_keyword_id key_id, int argc, char *const argv[], + int *argc_nr, struct ethsw_command_def *parsed_cmd); +} keyword[] = { + { + .keyword_name = "help", + .match = &keyword_match_gen, + }, { + .keyword_name = "show", + .match = &keyword_match_gen, + }, { + .keyword_name = "port", + .match = &keyword_match_port + }, { + .keyword_name = "enable", + .match = &keyword_match_gen, + }, { + .keyword_name = "disable", + .match = &keyword_match_gen, + }, +}; + +/* + * Function used by an Ethernet Switch driver to set the functions + * that must be called by the parser when an ethsw command is given + */ +int ethsw_define_functions(const struct ethsw_command_func *cmd_func) +{ + int i; + void **aux_p; + int (*cmd_func_aux)(struct ethsw_command_def *); + + if (!cmd_func->ethsw_name) + return -EINVAL; + + ethsw_name = cmd_func->ethsw_name; + + for (i = 0; i < ARRAY_SIZE(ethsw_cmd_def); i++) { + /* + * get the pointer to the function send by the Ethernet Switch + * driver that corresponds to the proper ethsw command + */ + if (ethsw_cmd_def[i].keyword_function) + continue; + + aux_p = (void *)cmd_func + ethsw_cmd_def[i].cmd_func_offset; + + cmd_func_aux = (int (*)(struct ethsw_command_def *)) *aux_p; + ethsw_cmd_def[i].keyword_function = cmd_func_aux; + } + + return 0; +} + +/* Generic function used to match a keyword only by a string */ +static int keyword_match_gen(enum ethsw_keyword_id key_id, int argc, + char *const argv[], int *argc_nr, + struct ethsw_command_def *parsed_cmd) +{ + if (strcmp(argv[*argc_nr], keyword[key_id].keyword_name) == 0) { + parsed_cmd->cmd_to_keywords[*argc_nr] = key_id; + + return 1; + } + return 0; +} + +/* Function used to match the command's port */ +static int keyword_match_port(enum ethsw_keyword_id key_id, int argc, + char *const argv[], int *argc_nr, + struct ethsw_command_def *parsed_cmd) +{ + unsigned long val; + + if (!keyword_match_gen(key_id, argc, argv, argc_nr, parsed_cmd)) + return 0; + + if (*argc_nr + 1 >= argc) + return 0; + + if (strict_strtoul(argv[*argc_nr + 1], 10, &val) != -EINVAL) { + parsed_cmd->port = val; + (*argc_nr)++; + parsed_cmd->cmd_to_keywords[*argc_nr] = ethsw_id_port_no; + return 1; + } + + return 0; +} + +/* Finds optional keywords and modifies *argc_va to skip them */ +static void cmd_keywords_opt_check(const struct ethsw_command_def *parsed_cmd, + int *argc_val) +{ + int i; + int keyw_opt_matched; + int argc_val_max; + int const *cmd_keyw_p; + int const *cmd_keyw_opt_p; + + /* remember the best match */ + argc_val_max = *argc_val; + + /* + * check if our command's optional keywords match the optional + * keywords of an available command + */ + for (i = 0; i < ARRAY_SIZE(ethsw_cmd_def); i++) { + keyw_opt_matched = 0; + cmd_keyw_p = &parsed_cmd->cmd_to_keywords[keyw_opt_matched]; + cmd_keyw_opt_p = &cmd_opt_def[i].cmd_keyword[keyw_opt_matched]; + + /* + * increase the number of keywords that + * matched with a command + */ + while (keyw_opt_matched + *argc_val < + parsed_cmd->cmd_keywords_nr && + *cmd_keyw_opt_p != ethsw_id_key_end && + *(cmd_keyw_p + *argc_val) == *cmd_keyw_opt_p) { + keyw_opt_matched++; + cmd_keyw_p++; + cmd_keyw_opt_p++; + } + + /* + * if all our optional command's keywords perfectly match an + * optional pattern, then we can move to the next defined + * keywords in our command; remember the one that matched the + * greatest number of keywords + */ + if (keyw_opt_matched + *argc_val <= + parsed_cmd->cmd_keywords_nr && + *cmd_keyw_opt_p == ethsw_id_key_end && + *argc_val + keyw_opt_matched > argc_val_max) + argc_val_max = *argc_val + keyw_opt_matched; + } + + *argc_val = argc_val_max; +} + +/* + * Finds the function to call based on keywords and + * modifies *argc_va to skip them + */ +static void cmd_keywords_check(struct ethsw_command_def *parsed_cmd, + int *argc_val) +{ + int i; + int keyw_matched; + int *cmd_keyw_p; + int *cmd_keyw_def_p; + + /* + * check if our command's keywords match the + * keywords of an available command + */ + for (i = 0; i < ARRAY_SIZE(ethsw_cmd_def); i++) { + keyw_matched = 0; + cmd_keyw_p = &parsed_cmd->cmd_to_keywords[keyw_matched]; + cmd_keyw_def_p = ðsw_cmd_def[i].cmd_keyword[keyw_matched]; + + /* + * increase the number of keywords that + * matched with a command + */ + while (keyw_matched + *argc_val < parsed_cmd->cmd_keywords_nr && + *cmd_keyw_def_p != ethsw_id_key_end && + *(cmd_keyw_p + *argc_val) == *cmd_keyw_def_p) { + keyw_matched++; + cmd_keyw_p++; + cmd_keyw_def_p++; + } + + /* + * if all our command's keywords perfectly match an + * available command, then we get the function we need to call + * to configure the Ethernet Switch + */ + if (keyw_matched && keyw_matched + *argc_val == + parsed_cmd->cmd_keywords_nr && + *cmd_keyw_def_p == ethsw_id_key_end) { + *argc_val += keyw_matched; + parsed_cmd->cmd_function = + ethsw_cmd_def[i].keyword_function; + return; + } + } +} + +/* find all the keywords in the command */ +static int keywords_find(int argc, char * const argv[], + struct ethsw_command_def *parsed_cmd) +{ + int i; + int j; + int argc_val; + int rc = CMD_RET_SUCCESS; + + for (i = 1; i < argc; i++) { + for (j = 0; j < ethsw_id_count; j++) { + if (keyword[j].match(j, argc, argv, &i, parsed_cmd)) + break; + } + } + + /* if there is no keyword match for a word, the command is invalid */ + for (i = 1; i < argc; i++) + if (parsed_cmd->cmd_to_keywords[i] == ethsw_id_key_end) + rc = CMD_RET_USAGE; + + parsed_cmd->cmd_keywords_nr = argc; + argc_val = 1; + + /* get optional parameters first */ + cmd_keywords_opt_check(parsed_cmd, &argc_val); + + if (argc_val == parsed_cmd->cmd_keywords_nr) + return CMD_RET_USAGE; + + /* + * check the keywords and if a match is found, + * get the function to call + */ + cmd_keywords_check(parsed_cmd, &argc_val); + + /* error if not all commands' parameters were matched */ + if (argc_val == parsed_cmd->cmd_keywords_nr) { + if (!parsed_cmd->cmd_function) { + printf("Command not available for: %s\n", ethsw_name); + rc = CMD_RET_FAILURE; + } + } else { + rc = CMD_RET_USAGE; + } + + return rc; +} + +static void command_def_init(struct ethsw_command_def *parsed_cmd) +{ + int i; + + for (i = 0; i < ETHSW_MAX_CMD_PARAMS; i++) + parsed_cmd->cmd_to_keywords[i] = ethsw_id_key_end; + + parsed_cmd->port = ETHSW_CMD_PORT_ALL; + parsed_cmd->cmd_function = NULL; +} + +/* function to interpret commands starting with "ethsw " */ +static int do_ethsw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + struct ethsw_command_def parsed_cmd; + int rc = CMD_RET_SUCCESS; + + if (argc == 1 || argc >= ETHSW_MAX_CMD_PARAMS) + return CMD_RET_USAGE; + + command_def_init(&parsed_cmd); + + rc = keywords_find(argc, argv, &parsed_cmd); + + if (rc == CMD_RET_SUCCESS) + rc = parsed_cmd.cmd_function(&parsed_cmd); + + return rc; +} + +#define ETHSW_PORT_CONF_HELP "[port <port_no>] { enable | disable | show } " \ +"- enable/disable a port; show shows a port's configuration" + +U_BOOT_CMD(ethsw, ETHSW_MAX_CMD_PARAMS, 0, do_ethsw, + "Ethernet l2 switch commands", + ETHSW_PORT_CONF_HELP"\n" +); diff --git a/include/ethsw.h b/include/ethsw.h new file mode 100644 index 0000000..9e80095 --- /dev/null +++ b/include/ethsw.h @@ -0,0 +1,48 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + * + * Ethernet Switch commands + */ + +#ifndef _CMD_ETHSW_H_ +#define _CMD_ETHSW_H_ + +#define ETHSW_MAX_CMD_PARAMS 20 +#define ETHSW_CMD_PORT_ALL -1 + +/* IDs used to track keywords in a command */ +enum ethsw_keyword_id { + ethsw_id_key_end = -1, + ethsw_id_help, + ethsw_id_show, + ethsw_id_port, + ethsw_id_enable, + ethsw_id_disable, + ethsw_id_count, /* keep last */ +}; + +enum ethsw_keyword_opt_id { + ethsw_id_port_no = ethsw_id_count + 1, + ethsw_id_count_all, /* keep last */ +}; + +struct ethsw_command_def { + int cmd_to_keywords[ETHSW_MAX_CMD_PARAMS]; + int cmd_keywords_nr; + int port; + int (*cmd_function)(struct ethsw_command_def *parsed_cmd); +}; + +/* Structure to be created and initialized by an Ethernet Switch driver */ +struct ethsw_command_func { + const char *ethsw_name; + int (*port_enable)(struct ethsw_command_def *parsed_cmd); + int (*port_disable)(struct ethsw_command_def *parsed_cmd); + int (*port_show)(struct ethsw_command_def *parsed_cmd); +}; + +int ethsw_define_functions(const struct ethsw_command_func *cmd_func); + +#endif /* _CMD_ETHSW_H_ */ |