backends/tpm/tpm_ioctl.h

6  * This file is licensed under the terms of the 3-clause BSD license
26  * the ptm_res as the first element.
27  * ptm_res corresponds to the error code of a command executed by the TPM.
42 /* PTM_GET_TPMESTABLISHED: get the establishment bit */
106  * size of the TPM state blob to transfer; x86_64 can handle 8k,
107  * ppc64le only ~7k; keep the response below a 4k page size
112  * The following is the data structure to get state blobs from the TPM.
113  * If the size of the state blob exceeds the PTM_STATE_BLOB_SIZE, multiple reads
115  * must be transferred and the transfer is done once the last byte has been
117  * It is possible to use the read() interface for reading the data; however, the
118  * first bytes of the state blob will be part of the response to the ioctl(); a
119  * subsequent read() is only necessary if the total length (totlength) exceeds
120  * the number of received bytes. seek() is not supported.
149  * The following is the data structure to set state blobs in the TPM.
150  * If the size of the state blob exceeds the PTM_STATE_BLOB_SIZE, multiple
151  * 'writes' using this ioctl are necessary. The last packet is indicated
152  * by the length being smaller than the PTM_STATE_BLOB_SIZE.
153  * The very first packet may have a length indicator of '0' enabling
154  * a write() with all the bytes from a buffer. If the write() interface
163             uint32_t length;      /* length of the data;
164                                      use 0 on the first packet to
191  * PTM_SET_BUFFERSIZE: Set the buffer size to be used by the TPM.
192  * A 0 on input queries for the current buffer size. Any other
193  * number will try to set the buffer size. The returned number is
194  * the buffer size that will be used, which can be larger than the
195  * requested one, if it was below the minimum, or smaller than the
196  * requested one, if it was above the maximum.
214  * PTM_GET_INFO: Get info about the TPM implementation (from libtpms)
219  * to a client. Therefore, totlength and length will be the same if
242  * PTM_LOCK_STORAGE: Lock the storage and retry n times
313  * Commands used by the non-CUSE TPMs
317  * The return messages only contain the 'resp' part of the unions
318  * in the data structures above. Besides that the limits in the