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