/* * Copyright (C) 2006 Michael Brown . * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include /** @file * * PXE API entry point */ /** A function pointer to hold any PXE API call * * Used by pxe_api_call() to avoid large swathes of duplicated code. */ union pxenv_call { PXENV_EXIT_t ( * any ) ( union u_PXENV_ANY * ); PXENV_EXIT_t ( * unknown ) ( struct s_PXENV_UNKNOWN * ); PXENV_EXIT_t ( * unload_stack ) ( struct s_PXENV_UNLOAD_STACK * ); PXENV_EXIT_t ( * get_cached_info ) ( struct s_PXENV_GET_CACHED_INFO * ); PXENV_EXIT_t ( * restart_tftp ) ( struct s_PXENV_TFTP_READ_FILE * ); PXENV_EXIT_t ( * start_undi ) ( struct s_PXENV_START_UNDI * ); PXENV_EXIT_t ( * stop_undi ) ( struct s_PXENV_STOP_UNDI * ); PXENV_EXIT_t ( * start_base ) ( struct s_PXENV_START_BASE * ); PXENV_EXIT_t ( * stop_base ) ( struct s_PXENV_STOP_BASE * ); PXENV_EXIT_t ( * tftp_open ) ( struct s_PXENV_TFTP_OPEN * ); PXENV_EXIT_t ( * tftp_close ) ( struct s_PXENV_TFTP_CLOSE * ); PXENV_EXIT_t ( * tftp_read ) ( struct s_PXENV_TFTP_READ * ); PXENV_EXIT_t ( * tftp_read_file ) ( struct s_PXENV_TFTP_READ_FILE * ); PXENV_EXIT_t ( * tftp_get_fsize ) ( struct s_PXENV_TFTP_GET_FSIZE * ); PXENV_EXIT_t ( * udp_open ) ( struct s_PXENV_UDP_OPEN * ); PXENV_EXIT_t ( * udp_close ) ( struct s_PXENV_UDP_CLOSE * ); PXENV_EXIT_t ( * udp_write ) ( struct s_PXENV_UDP_WRITE * ); PXENV_EXIT_t ( * udp_read ) ( struct s_PXENV_UDP_READ * ); PXENV_EXIT_t ( * undi_startup ) ( struct s_PXENV_UNDI_STARTUP * ); PXENV_EXIT_t ( * undi_cleanup ) ( struct s_PXENV_UNDI_CLEANUP * ); PXENV_EXIT_t ( * undi_initialize ) ( struct s_PXENV_UNDI_INITIALIZE * ); PXENV_EXIT_t ( * undi_reset_adapter ) ( struct s_PXENV_UNDI_RESET * ); PXENV_EXIT_t ( * undi_shutdown ) ( struct s_PXENV_UNDI_SHUTDOWN * ); PXENV_EXIT_t ( * undi_open ) ( struct s_PXENV_UNDI_OPEN * ); PXENV_EXIT_t ( * undi_close ) ( struct s_PXENV_UNDI_CLOSE * ); PXENV_EXIT_t ( * undi_transmit ) ( struct s_PXENV_UNDI_TRANSMIT * ); PXENV_EXIT_t ( * undi_set_mcast_address ) ( struct s_PXENV_UNDI_SET_MCAST_ADDRESS * ); PXENV_EXIT_t ( * undi_set_station_address ) ( struct s_PXENV_UNDI_SET_STATION_ADDRESS * ); PXENV_EXIT_t ( * undi_set_packet_filter ) ( struct s_PXENV_UNDI_SET_PACKET_FILTER * ); PXENV_EXIT_t ( * undi_get_information ) ( struct s_PXENV_UNDI_GET_INFORMATION * ); PXENV_EXIT_t ( * undi_get_statistics ) ( struct s_PXENV_UNDI_GET_STATISTICS * ); PXENV_EXIT_t ( * undi_clear_statistics ) ( struct s_PXENV_UNDI_CLEAR_STATISTICS * ); PXENV_EXIT_t ( * undi_initiate_diags ) ( struct s_PXENV_UNDI_INITIATE_DIAGS * ); PXENV_EXIT_t ( * undi_force_interrupt ) ( struct s_PXENV_UNDI_FORCE_INTERRUPT * ); PXENV_EXIT_t ( * undi_get_mcast_address ) ( struct s_PXENV_UNDI_GET_MCAST_ADDRESS * ); PXENV_EXIT_t ( * undi_get_nic_type ) ( struct s_PXENV_UNDI_GET_NIC_TYPE * ); PXENV_EXIT_t ( * undi_get_iface_info ) ( struct s_PXENV_UNDI_GET_IFACE_INFO * ); PXENV_EXIT_t ( * undi_get_state ) ( struct s_PXENV_UNDI_GET_STATE * ); PXENV_EXIT_t ( * undi_isr ) ( struct s_PXENV_UNDI_ISR * ); }; /** * Handle an unknown PXE API call * * @v pxenv_unknown Pointer to a struct s_PXENV_UNKNOWN * @ret #PXENV_EXIT_FAILURE Always * @err #PXENV_STATUS_UNSUPPORTED Always */ static PXENV_EXIT_t pxenv_unknown ( struct s_PXENV_UNKNOWN *pxenv_unknown ) { pxenv_unknown->Status = PXENV_STATUS_UNSUPPORTED; return PXENV_EXIT_FAILURE; } /** * Dispatch PXE API call * * @v bx PXE opcode * @v es:di Address of PXE parameter block * @ret ax PXE exit code */ void pxe_api_call ( struct i386_all_regs *ix86 ) { int opcode = ix86->regs.bx; userptr_t parameters = real_to_user ( ix86->segs.es, ix86->regs.di ); size_t param_len; union u_PXENV_ANY pxenv_any; union pxenv_call pxenv_call; PXENV_EXIT_t ret; switch ( opcode ) { case PXENV_UNLOAD_STACK: pxenv_call.unload_stack = pxenv_unload_stack; param_len = sizeof ( pxenv_any.unload_stack ); break; case PXENV_GET_CACHED_INFO: pxenv_call.get_cached_info = pxenv_get_cached_info; param_len = sizeof ( pxenv_any.get_cached_info ); break; case PXENV_RESTART_TFTP: pxenv_call.restart_tftp = pxenv_restart_tftp; param_len = sizeof ( pxenv_any.restart_tftp ); break; case PXENV_START_UNDI: pxenv_call.start_undi = pxenv_start_undi; param_len = sizeof ( pxenv_any.start_undi ); break; case PXENV_STOP_UNDI: pxenv_call.stop_undi = pxenv_stop_undi; param_len = sizeof ( pxenv_any.stop_undi ); break; case PXENV_START_BASE: pxenv_call.start_base = pxenv_start_base; param_len = sizeof ( pxenv_any.start_base ); break; case PXENV_STOP_BASE: pxenv_call.stop_base = pxenv_stop_base; param_len = sizeof ( pxenv_any.stop_base ); break; case PXENV_TFTP_OPEN: pxenv_call.tftp_open = pxenv_tftp_open; param_len = sizeof ( pxenv_any.tftp_open ); break; case PXENV_TFTP_CLOSE: pxenv_call.tftp_close = pxenv_tftp_close; param_len = sizeof ( pxenv_any.tftp_close ); break; case PXENV_TFTP_READ: pxenv_call.tftp_read = pxenv_tftp_read; param_len = sizeof ( pxenv_any.tftp_read ); break; case PXENV_TFTP_READ_FILE: pxenv_call.tftp_read_file = pxenv_tftp_read_file; param_len = sizeof ( pxenv_any.tftp_read_file ); break; case PXENV_TFTP_GET_FSIZE: pxenv_call.tftp_get_fsize = pxenv_tftp_get_fsize; param_len = sizeof ( pxenv_any.tftp_get_fsize ); break; case PXENV_UDP_OPEN: pxenv_call.udp_open = pxenv_udp_open; param_len = sizeof ( pxenv_any.udp_open ); break; case PXENV_UDP_CLOSE: pxenv_call.udp_close = pxenv_udp_close; param_len = sizeof ( pxenv_any.udp_close ); break; case PXENV_UDP_WRITE: pxenv_call.udp_write = pxenv_udp_write; param_len = sizeof ( pxenv_any.udp_write ); break; case PXENV_UDP_READ: pxenv_call.udp_read = pxenv_udp_read; param_len = sizeof ( pxenv_any.udp_read ); break; case PXENV_UNDI_STARTUP: pxenv_call.undi_startup = pxenv_undi_startup; param_len = sizeof ( pxenv_any.undi_startup ); break; case PXENV_UNDI_CLEANUP: pxenv_call.undi_cleanup = pxenv_undi_cleanup; param_len = sizeof ( pxenv_any.undi_cleanup ); break; case PXENV_UNDI_INITIALIZE: pxenv_call.undi_initialize = pxenv_undi_initialize; param_len = sizeof ( pxenv_any.undi_initialize ); break; case PXENV_UNDI_RESET_ADAPTER: pxenv_call.undi_reset_adapter = pxenv_undi_reset_adapter; param_len = sizeof ( pxenv_any.undi_reset_adapter ); break; case PXENV_UNDI_SHUTDOWN: pxenv_call.undi_shutdown = pxenv_undi_shutdown; param_len = sizeof ( pxenv_any.undi_shutdown ); break; case PXENV_UNDI_OPEN: pxenv_call.undi_open = pxenv_undi_open; param_len = sizeof ( pxenv_any.undi_open ); break; case PXENV_UNDI_CLOSE: pxenv_call.undi_close = pxenv_undi_close; param_len = sizeof ( pxenv_any.undi_close ); break; case PXENV_UNDI_TRANSMIT: pxenv_call.undi_transmit = pxenv_undi_transmit; param_len = sizeof ( pxenv_any.undi_transmit ); break; case PXENV_UNDI_SET_MCAST_ADDRESS: pxenv_call.undi_set_mcast_address = pxenv_undi_set_mcast_address; param_len = sizeof ( pxenv_any.undi_set_mcast_address ); break; case PXENV_UNDI_SET_STATION_ADDRESS: pxenv_call.undi_set_station_address = pxenv_undi_set_station_address; param_len = sizeof ( pxenv_any.undi_set_station_address ); break; case PXENV_UNDI_SET_PACKET_FILTER: pxenv_call.undi_set_packet_filter = pxenv_undi_set_packet_filter; param_len = sizeof ( pxenv_any.undi_set_packet_filter ); break; case PXENV_UNDI_GET_INFORMATION: pxenv_call.undi_get_information = pxenv_undi_get_information; param_len = sizeof ( pxenv_any.undi_get_information ); break; case PXENV_UNDI_GET_STATISTICS: pxenv_call.undi_get_statistics = pxenv_undi_get_statistics; param_len = sizeof ( pxenv_any.undi_get_statistics ); break; case PXENV_UNDI_CLEAR_STATISTICS: pxenv_call.undi_clear_statistics = pxenv_undi_clear_statistics; param_len = sizeof ( pxenv_any.undi_clear_statistics ); break; case PXENV_UNDI_INITIATE_DIAGS: pxenv_call.undi_initiate_diags = pxenv_undi_initiate_diags; param_len = sizeof ( pxenv_any.undi_initiate_diags ); break; case PXENV_UNDI_FORCE_INTERRUPT: pxenv_call.undi_force_interrupt = pxenv_undi_force_interrupt; param_len = sizeof ( pxenv_any.undi_force_interrupt ); break; case PXENV_UNDI_GET_MCAST_ADDRESS: pxenv_call.undi_get_mcast_address = pxenv_undi_get_mcast_address; param_len = sizeof ( pxenv_any.undi_get_mcast_address ); break; case PXENV_UNDI_GET_NIC_TYPE: pxenv_call.undi_get_nic_type = pxenv_undi_get_nic_type; param_len = sizeof ( pxenv_any.undi_get_nic_type ); break; case PXENV_UNDI_GET_IFACE_INFO: pxenv_call.undi_get_iface_info = pxenv_undi_get_iface_info; param_len = sizeof ( pxenv_any.undi_get_iface_info ); break; case PXENV_UNDI_ISR: pxenv_call.undi_isr = pxenv_undi_isr; param_len = sizeof ( pxenv_any.undi_isr ); break; default: DBG ( "PXENV_UNKNOWN_%hx", opcode ); pxenv_call.unknown = pxenv_unknown; param_len = sizeof ( pxenv_any.unknown ); break; } /* Copy parameter block from caller */ copy_from_user ( &pxenv_any, parameters, 0, param_len ); /* Set default status in case child routine fails to do so */ pxenv_any.Status = PXENV_STATUS_FAILURE; /* Hand off to relevant API routine */ DBG ( "[" ); ret = pxenv_call.any ( &pxenv_any ); if ( pxenv_any.Status != PXENV_STATUS_SUCCESS ) { DBG ( " %02x", pxenv_any.Status ); } if ( ret != PXENV_EXIT_SUCCESS ) { DBG ( ret == PXENV_EXIT_FAILURE ? " err" : " ??" ); } DBG ( "]" ); /* Copy modified parameter block back to caller and return */ copy_to_user ( parameters, 0, &pxenv_any, param_len ); ix86->regs.ax = ret; }