6674ff145e
When the TPM response reception is interrupted in the wait_event_interruptable call, the TPM is still busy processing the command and will only deliver the response later. So we have to wait for an outstanding response before sending a new request to avoid trying to put a 2nd request into the CRQ. Also reset the res_len before sending a command so we will end up in that wait_event_interruptable() waiting for the response rather than reading the command packet as a response. The easiest way to trigger the problem is to run the following cd /sys/device/vio/71000004 while :; cat pcrs >/dev/null; done And press Ctrl-C. This will then display an error tpm_ibmvtpm 71000004: tpm_transmit: tpm_recv: error -4 followed by several other errors once interaction with the TPM resumes. tpm_ibmvtpm 71000004: A TPM error (101) occurred attempting to determine the number of PCRS. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: Hon Ching(Vicky) Lo <honclo@linux.vnet.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Ashley Lai <ashley@ashleylai.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Acked-by: Peter Huewe <peterhuewe@gmx.de>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2012 IBM Corporation
|
|
*
|
|
* Author: Ashley Lai <ashleydlai@gmail.com>
|
|
*
|
|
* Maintained by: <tpmdd-devel@lists.sourceforge.net>
|
|
*
|
|
* Device driver for TCG/TCPA TPM (trusted platform module).
|
|
* Specifications at www.trustedcomputinggroup.org
|
|
*
|
|
* 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, version 2 of the
|
|
* License.
|
|
*
|
|
*/
|
|
|
|
#ifndef __TPM_IBMVTPM_H__
|
|
#define __TPM_IBMVTPM_H__
|
|
|
|
/* vTPM Message Format 1 */
|
|
struct ibmvtpm_crq {
|
|
u8 valid;
|
|
u8 msg;
|
|
__be16 len;
|
|
__be32 data;
|
|
__be64 reserved;
|
|
} __attribute__((packed, aligned(8)));
|
|
|
|
struct ibmvtpm_crq_queue {
|
|
struct ibmvtpm_crq *crq_addr;
|
|
u32 index;
|
|
u32 num_entry;
|
|
};
|
|
|
|
struct ibmvtpm_dev {
|
|
struct device *dev;
|
|
struct vio_dev *vdev;
|
|
struct ibmvtpm_crq_queue crq_queue;
|
|
dma_addr_t crq_dma_handle;
|
|
u32 rtce_size;
|
|
void __iomem *rtce_buf;
|
|
dma_addr_t rtce_dma_handle;
|
|
spinlock_t rtce_lock;
|
|
wait_queue_head_t wq;
|
|
u16 res_len;
|
|
u32 vtpm_version;
|
|
bool tpm_processing_cmd;
|
|
};
|
|
|
|
#define CRQ_RES_BUF_SIZE PAGE_SIZE
|
|
|
|
/* Initialize CRQ */
|
|
#define INIT_CRQ_CMD 0xC001000000000000LL /* Init cmd */
|
|
#define INIT_CRQ_COMP_CMD 0xC002000000000000LL /* Init complete cmd */
|
|
#define INIT_CRQ_RES 0x01 /* Init respond */
|
|
#define INIT_CRQ_COMP_RES 0x02 /* Init complete respond */
|
|
#define VALID_INIT_CRQ 0xC0 /* Valid command for init crq */
|
|
|
|
/* vTPM CRQ response is the message type | 0x80 */
|
|
#define VTPM_MSG_RES 0x80
|
|
#define IBMVTPM_VALID_CMD 0x80
|
|
|
|
/* vTPM CRQ message types */
|
|
#define VTPM_GET_VERSION 0x01
|
|
#define VTPM_GET_VERSION_RES (0x01 | VTPM_MSG_RES)
|
|
|
|
#define VTPM_TPM_COMMAND 0x02
|
|
#define VTPM_TPM_COMMAND_RES (0x02 | VTPM_MSG_RES)
|
|
|
|
#define VTPM_GET_RTCE_BUFFER_SIZE 0x03
|
|
#define VTPM_GET_RTCE_BUFFER_SIZE_RES (0x03 | VTPM_MSG_RES)
|
|
|
|
#define VTPM_PREPARE_TO_SUSPEND 0x04
|
|
#define VTPM_PREPARE_TO_SUSPEND_RES (0x04 | VTPM_MSG_RES)
|
|
|
|
#endif
|