1 /* 2 * Copyright 2012 Tilera Corporation. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 11 * NON INFRINGEMENT. See the GNU General Public License for 12 * more details. 13 */ 14 15 /* 16 * Implementation of trio gxio calls. 17 */ 18 19 #include <linux/errno.h> 20 #include <linux/io.h> 21 #include <linux/module.h> 22 23 #include <gxio/trio.h> 24 #include <gxio/iorpc_globals.h> 25 #include <gxio/iorpc_trio.h> 26 #include <gxio/kiorpc.h> 27 gxio_trio_init(gxio_trio_context_t * context,unsigned int trio_index)28int gxio_trio_init(gxio_trio_context_t *context, unsigned int trio_index) 29 { 30 char file[32]; 31 int fd; 32 33 snprintf(file, sizeof(file), "trio/%d/iorpc", trio_index); 34 fd = hv_dev_open((HV_VirtAddr) file, 0); 35 if (fd < 0) { 36 context->fd = -1; 37 38 if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX) 39 return fd; 40 else 41 return -ENODEV; 42 } 43 44 context->fd = fd; 45 46 return 0; 47 } 48 49 EXPORT_SYMBOL_GPL(gxio_trio_init); 50