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drm/panfrost: Introduce uAPI for JM context creation

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The new uAPI lets user space query the KM driver for the available
priorities a job can be given at submit time. These are managed through
the notion of a context, for which we also provide new creation and
destruction ioctls.

Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20250917191859.500279-2-adrian.larumbe@collabora.com
This commit is contained in:
Boris Brezillon 2025-09-17 20:18:37 +01:00 committed by Steven Price
parent 0bf37f45d5
commit b060004f06
1 changed files with 50 additions and 0 deletions
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50
include/uapi/drm/panfrost_drm.h
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@ -22,6 +22,8 @@ extern "C" {
#define DRM_PANFROST_PERFCNT_DUMP 0x07
#define DRM_PANFROST_MADVISE 0x08
#define DRM_PANFROST_SET_LABEL_BO 0x09
#define DRM_PANFROST_JM_CTX_CREATE 0x0a
#define DRM_PANFROST_JM_CTX_DESTROY 0x0b
#define DRM_IOCTL_PANFROST_SUBMIT DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_SUBMIT, struct drm_panfrost_submit)
#define DRM_IOCTL_PANFROST_WAIT_BO DRM_IOW(DRM_COMMAND_BASE + DRM_PANFROST_WAIT_BO, struct drm_panfrost_wait_bo)
@ -31,6 +33,8 @@ extern "C" {
#define DRM_IOCTL_PANFROST_GET_BO_OFFSET DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_GET_BO_OFFSET, struct drm_panfrost_get_bo_offset)
#define DRM_IOCTL_PANFROST_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_MADVISE, struct drm_panfrost_madvise)
#define DRM_IOCTL_PANFROST_SET_LABEL_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_SET_LABEL_BO, struct drm_panfrost_set_label_bo)
#define DRM_IOCTL_PANFROST_JM_CTX_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_JM_CTX_CREATE, struct drm_panfrost_jm_ctx_create)
#define DRM_IOCTL_PANFROST_JM_CTX_DESTROY DRM_IOWR(DRM_COMMAND_BASE + DRM_PANFROST_JM_CTX_DESTROY, struct drm_panfrost_jm_ctx_destroy)
/*
* Unstable ioctl(s): only exposed when the unsafe unstable_ioctls module
@ -71,6 +75,12 @@ struct drm_panfrost_submit {
/** A combination of PANFROST_JD_REQ_* */
__u32 requirements;
/** JM context handle. Zero if you want to use the default context. */
__u32 jm_ctx_handle;
/** Padding field. MBZ. */
__u32 pad;
};
/**
@ -177,6 +187,7 @@ enum drm_panfrost_param {
DRM_PANFROST_PARAM_AFBC_FEATURES,
DRM_PANFROST_PARAM_SYSTEM_TIMESTAMP,
DRM_PANFROST_PARAM_SYSTEM_TIMESTAMP_FREQUENCY,
DRM_PANFROST_PARAM_ALLOWED_JM_CTX_PRIORITIES,
};
struct drm_panfrost_get_param {
@ -299,6 +310,45 @@ struct panfrost_dump_registers {
__u32 value;
};
enum drm_panfrost_jm_ctx_priority {
/**
* @PANFROST_JM_CTX_PRIORITY_LOW: Low priority context.
*/
PANFROST_JM_CTX_PRIORITY_LOW = 0,
/**
* @PANFROST_JM_CTX_PRIORITY_MEDIUM: Medium priority context.
*/
PANFROST_JM_CTX_PRIORITY_MEDIUM,
/**
* @PANFROST_JM_CTX_PRIORITY_HIGH: High priority context.
*
* Requires CAP_SYS_NICE or DRM_MASTER.
*/
PANFROST_JM_CTX_PRIORITY_HIGH,
};
struct drm_panfrost_jm_ctx_create {
/** @handle: Handle of the created JM context */
__u32 handle;
/** @priority: Context priority (see enum drm_panfrost_jm_ctx_priority). */
__u32 priority;
};
struct drm_panfrost_jm_ctx_destroy {
/**
* @handle: Handle of the JM context to destroy.
*
* Must be a valid context handle returned by DRM_IOCTL_PANTHOR_JM_CTX_CREATE.
*/
__u32 handle;
/** @pad: Padding field, MBZ. */
__u32 pad;
};
#if defined(__cplusplus)
}
#endif