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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __PSP_SEV_TIO_H__
#define __PSP_SEV_TIO_H__
#include <linux/pci-tsm.h>
#include <linux/pci-ide.h>
#include <linux/tsm.h>
#include <uapi/linux/psp-sev.h>
struct sla_addr_t {
union {
u64 sla;
struct {
u64 page_type :1,
page_size :1,
reserved1 :10,
pfn :40,
reserved2 :12;
};
};
} __packed;
#define SEV_TIO_MAX_COMMAND_LENGTH 128
/* SPDM control structure for DOE */
struct tsm_spdm {
unsigned long req_len;
void *req;
unsigned long rsp_len;
void *rsp;
};
/* Describes TIO device */
struct tsm_dsm_tio {
u8 cert_slot;
struct sla_addr_t dev_ctx;
struct sla_addr_t req;
struct sla_addr_t resp;
struct sla_addr_t scratch;
struct sla_addr_t output;
size_t output_len;
size_t scratch_len;
struct tsm_spdm spdm;
struct sla_buffer_hdr *reqbuf; /* vmap'ed @req for DOE */
struct sla_buffer_hdr *respbuf; /* vmap'ed @resp for DOE */
int cmd;
int psp_ret;
u8 cmd_data[SEV_TIO_MAX_COMMAND_LENGTH];
void *data_pg; /* Data page for DEV_STATUS/TDI_STATUS/TDI_INFO/ASID_FENCE */
#define TIO_IDE_MAX_TC 8
struct pci_ide *ide[TIO_IDE_MAX_TC];
};
/* Describes TSM structure for PF0 pointed by pci_dev->tsm */
struct tio_dsm {
struct pci_tsm_pf0 tsm;
struct tsm_dsm_tio data;
struct sev_device *sev;
};
/* Data object IDs */
#define SPDM_DOBJ_ID_NONE 0
#define SPDM_DOBJ_ID_REQ 1
#define SPDM_DOBJ_ID_RESP 2
struct spdm_dobj_hdr {
u32 id; /* Data object type identifier */
u32 length; /* Length of the data object, INCLUDING THIS HEADER */
struct { /* Version of the data object structure */
u8 minor;
u8 major;
} version;
} __packed;
/**
* struct sev_tio_status - TIO_STATUS command's info_paddr buffer
*
* @length: Length of this structure in bytes
* @tio_en: Indicates that SNP_INIT_EX initialized the RMP for SEV-TIO
* @tio_init_done: Indicates TIO_INIT has been invoked
* @spdm_req_size_min: Minimum SPDM request buffer size in bytes
* @spdm_req_size_max: Maximum SPDM request buffer size in bytes
* @spdm_scratch_size_min: Minimum SPDM scratch buffer size in bytes
* @spdm_scratch_size_max: Maximum SPDM scratch buffer size in bytes
* @spdm_out_size_min: Minimum SPDM output buffer size in bytes
* @spdm_out_size_max: Maximum for the SPDM output buffer size in bytes
* @spdm_rsp_size_min: Minimum SPDM response buffer size in bytes
* @spdm_rsp_size_max: Maximum SPDM response buffer size in bytes
* @devctx_size: Size of a device context buffer in bytes
* @tdictx_size: Size of a TDI context buffer in bytes
* @tio_crypto_alg: TIO crypto algorithms supported
*/
struct sev_tio_status {
u32 length;
u32 tio_en :1,
tio_init_done :1,
reserved :30;
u32 spdm_req_size_min;
u32 spdm_req_size_max;
u32 spdm_scratch_size_min;
u32 spdm_scratch_size_max;
u32 spdm_out_size_min;
u32 spdm_out_size_max;
u32 spdm_rsp_size_min;
u32 spdm_rsp_size_max;
u32 devctx_size;
u32 tdictx_size;
u32 tio_crypto_alg;
u8 reserved2[12];
} __packed;
int sev_tio_init_locked(void *tio_status_page);
int sev_tio_continue(struct tsm_dsm_tio *dev_data);
int sev_tio_dev_create(struct tsm_dsm_tio *dev_data, u16 device_id, u16 root_port_id,
u8 segment_id);
int sev_tio_dev_connect(struct tsm_dsm_tio *dev_data, u8 tc_mask, u8 ids[8], u8 cert_slot);
int sev_tio_dev_disconnect(struct tsm_dsm_tio *dev_data, bool force);
int sev_tio_dev_reclaim(struct tsm_dsm_tio *dev_data);
#endif /* __PSP_SEV_TIO_H__ */
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