1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012 IBM Corporation 4 * 5 * Author: Ashley Lai <ashleydlai@gmail.com> 6 * 7 * Maintained by: <tpmdd-devel@lists.sourceforge.net> 8 * 9 * Device driver for TCG/TCPA TPM (trusted platform module). 10 * Specifications at www.trustedcomputinggroup.org 11 */ 12 13 #ifndef __TPM_IBMVTPM_H__ 14 #define __TPM_IBMVTPM_H__ 15 16 /* vTPM Message Format 1 */ 17 struct ibmvtpm_crq { 18 u8 valid; 19 u8 msg; 20 __be16 len; 21 __be32 data; 22 __be64 reserved; 23 } __attribute__((packed, aligned(8))); 24 25 struct ibmvtpm_crq_queue { 26 struct ibmvtpm_crq *crq_addr; 27 u32 index; 28 u32 num_entry; 29 wait_queue_head_t wq; 30 }; 31 32 struct ibmvtpm_dev { 33 struct device *dev; 34 struct vio_dev *vdev; 35 struct ibmvtpm_crq_queue crq_queue; 36 dma_addr_t crq_dma_handle; 37 u32 rtce_size; 38 void __iomem *rtce_buf; 39 dma_addr_t rtce_dma_handle; 40 spinlock_t rtce_lock; 41 wait_queue_head_t wq; 42 u16 res_len; 43 u32 vtpm_version; 44 bool tpm_processing_cmd; 45 }; 46 47 #define CRQ_RES_BUF_SIZE PAGE_SIZE 48 49 /* Initialize CRQ */ 50 #define INIT_CRQ_CMD 0xC001000000000000LL /* Init cmd */ 51 #define INIT_CRQ_COMP_CMD 0xC002000000000000LL /* Init complete cmd */ 52 #define INIT_CRQ_RES 0x01 /* Init respond */ 53 #define INIT_CRQ_COMP_RES 0x02 /* Init complete respond */ 54 #define VALID_INIT_CRQ 0xC0 /* Valid command for init crq */ 55 56 /* vTPM CRQ response is the message type | 0x80 */ 57 #define VTPM_MSG_RES 0x80 58 #define IBMVTPM_VALID_CMD 0x80 59 60 /* vTPM CRQ message types */ 61 #define VTPM_GET_VERSION 0x01 62 #define VTPM_GET_VERSION_RES (0x01 | VTPM_MSG_RES) 63 64 #define VTPM_TPM_COMMAND 0x02 65 #define VTPM_TPM_COMMAND_RES (0x02 | VTPM_MSG_RES) 66 67 #define VTPM_GET_RTCE_BUFFER_SIZE 0x03 68 #define VTPM_GET_RTCE_BUFFER_SIZE_RES (0x03 | VTPM_MSG_RES) 69 70 #define VTPM_PREPARE_TO_SUSPEND 0x04 71 #define VTPM_PREPARE_TO_SUSPEND_RES (0x04 | VTPM_MSG_RES) 72 73 #endif 74