1 /* 2 * Copyright (C) 2012 IBM Corporation 3 * 4 * Author: Ashley Lai <ashleydlai@gmail.com> 5 * 6 * Maintained by: <tpmdd-devel@lists.sourceforge.net> 7 * 8 * Device driver for TCG/TCPA TPM (trusted platform module). 9 * Specifications at www.trustedcomputinggroup.org 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation, version 2 of the 14 * License. 15 * 16 */ 17 18 #ifndef __TPM_IBMVTPM_H__ 19 #define __TPM_IBMVTPM_H__ 20 21 /* vTPM Message Format 1 */ 22 struct ibmvtpm_crq { 23 u8 valid; 24 u8 msg; 25 __be16 len; 26 __be32 data; 27 __be64 reserved; 28 } __attribute__((packed, aligned(8))); 29 30 struct ibmvtpm_crq_queue { 31 struct ibmvtpm_crq *crq_addr; 32 u32 index; 33 u32 num_entry; 34 }; 35 36 struct ibmvtpm_dev { 37 struct device *dev; 38 struct vio_dev *vdev; 39 struct ibmvtpm_crq_queue crq_queue; 40 dma_addr_t crq_dma_handle; 41 u32 rtce_size; 42 void __iomem *rtce_buf; 43 dma_addr_t rtce_dma_handle; 44 spinlock_t rtce_lock; 45 wait_queue_head_t wq; 46 u16 res_len; 47 u32 vtpm_version; 48 }; 49 50 #define CRQ_RES_BUF_SIZE PAGE_SIZE 51 52 /* Initialize CRQ */ 53 #define INIT_CRQ_CMD 0xC001000000000000LL /* Init cmd */ 54 #define INIT_CRQ_COMP_CMD 0xC002000000000000LL /* Init complete cmd */ 55 #define INIT_CRQ_RES 0x01 /* Init respond */ 56 #define INIT_CRQ_COMP_RES 0x02 /* Init complete respond */ 57 #define VALID_INIT_CRQ 0xC0 /* Valid command for init crq */ 58 59 /* vTPM CRQ response is the message type | 0x80 */ 60 #define VTPM_MSG_RES 0x80 61 #define IBMVTPM_VALID_CMD 0x80 62 63 /* vTPM CRQ message types */ 64 #define VTPM_GET_VERSION 0x01 65 #define VTPM_GET_VERSION_RES (0x01 | VTPM_MSG_RES) 66 67 #define VTPM_TPM_COMMAND 0x02 68 #define VTPM_TPM_COMMAND_RES (0x02 | VTPM_MSG_RES) 69 70 #define VTPM_GET_RTCE_BUFFER_SIZE 0x03 71 #define VTPM_GET_RTCE_BUFFER_SIZE_RES (0x03 | VTPM_MSG_RES) 72 73 #define VTPM_PREPARE_TO_SUSPEND 0x04 74 #define VTPM_PREPARE_TO_SUSPEND_RES (0x04 | VTPM_MSG_RES) 75 76 #endif 77