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/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2021 Intel Corporation
*/
#ifndef __I915_DRM_DOWNSTREAM_H__
#define __I915_DRM_DOWNSTREAM_H__
#include "drm.h"
/*
* Modifications to structs/values defined here are subject to
* backwards-compatibility constraints.
*
* Downstream declarations must be added here, not to i915_drm.h.
* The values in i915_drm_downstream.h must also be kept
* synchronized with values in i915_drm.h.
*/
#define DOWNSTREAM_DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
[DRM_IOCTL_NR(DOWNSTREAM_DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = { \
.cmd = DOWNSTREAM_DRM_IOCTL_##ioctl, \
.func = _func, \
.flags = _flags, \
.name = #ioctl \
}
/* DOWNSTREAM ioctl's */
/* DOWNSTREAM ioctl numbers go down from 0x5f */
#define DOWNSTREAM_DRM_I915_PXP_OPS 0x5f
#define DOWNSTREAM_DRM_IOCTL_I915_PXP_OPS DRM_IOWR(DRM_COMMAND_BASE + DOWNSTREAM_DRM_I915_PXP_OPS, struct downstream_drm_i915_pxp_ops)
/* End DOWNSTREAM ioctl's */
/*
* struct pxp_set_session_status_params - Params to reserved, set or destroy
* the session from the PXP state machine.
*/
struct downstream_drm_i915_pxp_set_session_status_params {
__u32 pxp_tag; /* in/out, session identifier tag */
__u32 session_type; /* in, session type */
__u32 session_mode; /* in, session mode */
#define DOWNSTREAM_DRM_I915_PXP_MODE_LM 0
#define DOWNSTREAM_DRM_I915_PXP_MODE_HM 1
#define DOWNSTREAM_DRM_I915_PXP_MODE_SM 2
__u32 req_session_state; /* in, new session state */
/* Request KMD to allocate session id and move it to INIT */
#define DOWNSTREAM_DRM_I915_PXP_REQ_SESSION_ID_INIT 0
/* Inform KMD that UMD has completed the initialization */
#define DOWNSTREAM_DRM_I915_PXP_REQ_SESSION_IN_PLAY 1
/* Request KMD to terminate the session */
#define DOWNSTREAM_DRM_I915_PXP_REQ_SESSION_TERMINATE 2
} __attribute__((packed));
/*
* struct pxp_tee_io_message_params - Params to send/receive message to/from TEE.
*/
struct downstream_drm_i915_pxp_tee_io_message_params {
__u64 msg_in; /* in - pointer to buffer containing input message */
__u32 msg_in_size; /* in - input message size */
__u64 msg_out; /* in - pointer to buffer to store the output message */
__u32 msg_out_buf_size; /* in - provided output message buffer size */
__u32 msg_out_ret_size; /* out- output message actual size returned from TEE */
} __attribute__((packed));
/*
* struct drm_i915_pxp_query_tag - Params to query the PXP tag of specified
* session id and whether the session is alive from PXP state machine.
*/
struct downstream_drm_i915_pxp_query_tag {
__u32 session_is_alive;
/*
* in - Session ID, out pxp tag.
* Tag format:
* bits 0-6: session id
* bit 7: rsvd
* bits 8-15: instance id
* bit 16: session enabled
* bit 17: mode hm
* bit 18: rsvd
* bit 19: mode sm
* bits 20-31: rsvd
*/
__u32 pxp_tag;
#define DOWNSTREAM_DRM_I915_PXP_TAG_SESSION_ID_MASK (0x7f)
#define DOWNSTREAM_DRM_I915_PXP_TAG_INSTANCE_ID_MASK (0xff << 8)
#define DOWNSTREAM_DRM_I915_PXP_TAG_SESSION_ENABLED (0x1 << 16)
#define DOWNSTREAM_DRM_I915_PXP_TAG_SESSION_HM (0x1 << 17)
#define DOWNSTREAM_DRM_I915_PXP_TAG_SESSION_SM (0x1 << 19)
} __attribute__((packed));
/*
* DRM_I915_PXP_OPS -
*
* PXP is an i915 componment, that helps user space to establish the hardware
* protected session and manage the status of each alive software session,
* as well as the life cycle of each session.
*
* This ioctl is to allow user space driver to create, set, and destroy each
* session. It also provides the communication chanel to TEE (Trusted
* Execution Environment) for the protected hardware session creation.
*/
struct downstream_drm_i915_pxp_ops {
__u32 action; /* in - specified action of this operation */
#define DOWNSTREAM_DRM_I915_PXP_ACTION_SET_SESSION_STATUS 0
#define DOWNSTREAM_DRM_I915_PXP_ACTION_TEE_IO_MESSAGE 1
#define DOWNSTREAM_DRM_I915_PXP_ACTION_QUERY_PXP_TAG 2
__u32 status; /* out - status output for this operation */
#define DOWNSTREAM_DRM_I915_PXP_OP_STATUS_SUCCESS 0
#define DOWNSTREAM_DRM_I915_PXP_OP_STATUS_RETRY_REQUIRED 1
#define DOWNSTREAM_DRM_I915_PXP_OP_STATUS_SESSION_NOT_AVAILABLE 2
#define DOWNSTREAM_DRM_I915_PXP_OP_STATUS_ERROR_UNKNOWN 3
__u64 params; /* in/out - pointer to data matching the action */
} __attribute__((packed));
#define DOWNSTREAM_PERF_VERSION (1000)
#endif /* __I915_DRM_DOWNSTREAM_H__ */
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