/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2024 Tomeu Vizoso
*/
#ifndef __DRM_UAPI_ROCKET_ACCEL_H__
#define __DRM_UAPI_ROCKET_ACCEL_H__
#include "drm.h"
#if defined(__cplusplus)
extern "C" {
#endif
#define DRM_ROCKET_CREATE_BO 0x00
#define DRM_ROCKET_SUBMIT 0x01
#define DRM_ROCKET_PREP_BO 0x02
#define DRM_ROCKET_FINI_BO 0x03
#define DRM_IOCTL_ROCKET_CREATE_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_ROCKET_CREATE_BO, struct drm_rocket_create_bo)
#define DRM_IOCTL_ROCKET_SUBMIT DRM_IOW(DRM_COMMAND_BASE + DRM_ROCKET_SUBMIT, struct drm_rocket_submit)
#define DRM_IOCTL_ROCKET_PREP_BO DRM_IOW(DRM_COMMAND_BASE + DRM_ROCKET_PREP_BO, struct drm_rocket_prep_bo)
#define DRM_IOCTL_ROCKET_FINI_BO DRM_IOW(DRM_COMMAND_BASE + DRM_ROCKET_FINI_BO, struct drm_rocket_fini_bo)
/**
* struct drm_rocket_create_bo - ioctl argument for creating Rocket BOs.
*
*/
struct drm_rocket_create_bo {
/** Input: Size of the requested BO. */
__u32 size;
/** Output: GEM handle for the BO. */
__u32 handle;
/**
* Output: DMA address for the BO in the NPU address space. This address
* is private to the DRM fd and is valid for the lifetime of the GEM
* handle.
*/
__u64 dma_address;
/** Output: Offset into the drm node to use for subsequent mmap call. */
__u64 offset;
};
/**
* struct drm_rocket_prep_bo - ioctl argument for starting CPU ownership of the BO.
*
* Takes care of waiting for any NPU jobs that might still use the NPU and performs cache
* synchronization.
*/
struct drm_rocket_prep_bo {
/** Input: GEM handle of the buffer object. */
__u32 handle;
/** Reserved, must be zero. */
__u32 reserved;
/** Input: Amount of time to wait for NPU jobs. */
__s64 timeout_ns;
};
/**
* struct drm_rocket_fini_bo - ioctl argument for finishing CPU ownership of the BO.
*
* Synchronize caches for NPU access.
*/
struct drm_rocket_fini_bo {
/** Input: GEM handle of the buffer object. */
__u32 handle;
/** Reserved, must be zero. */
__u32 reserved;
};
/**
* struct drm_rocket_task - A task to be run on the NPU
*
* A task is the smallest unit of work that can be run on the NPU.
*/
struct drm_rocket_task {
/** Input: DMA address to NPU mapping of register command buffer */
__u32 regcmd;
/** Input: Number of commands in the register command buffer */
__u32 regcmd_count;
};
/**
* struct drm_rocket_job - A job to be run on the NPU
*
* The kernel will schedule the execution of this job taking into account its
* dependencies with other jobs. All tasks in the same job will be executed
* sequentially on the same core, to benefit from memory residency in SRAM.
*/
struct drm_rocket_job {
/** Input: Pointer to an array of struct drm_rocket_task. */
__u64 tasks;
/** Input: Pointer to a u32 array of the BOs that are read by the job. */
__u64 in_bo_handles;
/** Input: Pointer to a u32 array of the BOs that are written to by the job. */
__u64 out_bo_handles;
/** Input: Number of tasks passed in. */
__u32 task_count;
/** Input: Size in bytes of the structs in the @tasks field. */
__u32 task_struct_size;
/** Input: Number of input BO handles passed in (size is that times 4). */
__u32 in_bo_handle_count;
/** Input: Number of output BO handles passed in (size is that times 4). */
__u32 out_bo_handle_count;
};
/**
* struct drm_rocket_submit - ioctl argument for submitting commands to the NPU.
*
* The kernel will schedule the execution of these jobs in dependency order.
*/
struct drm_rocket_submit {
/** Input: Pointer to an array of struct drm_rocket_job. */
__u64 jobs;
/** Input: Number of jobs passed in. */
__u32 job_count;
/** Input: Size in bytes of the structs in the @jobs field. */
__u32 job_struct_size;
/** Reserved, must be zero. */
__u64 reserved;
};
#if defined(__cplusplus)
}
#endif
#endif /* __DRM_UAPI_ROCKET_ACCEL_H__ */
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