drm/panthor: Add uAPI

Panthor follows the lead of other recently submitted drivers with
ioctls allowing us to support modern Vulkan features, like sparse memory
binding:

- Pretty standard GEM management ioctls (BO_CREATE and BO_MMAP_OFFSET),
  with the 'exclusive-VM' bit to speed-up BO reservation on job submission
- VM management ioctls (VM_CREATE, VM_DESTROY and VM_BIND). The VM_BIND
  ioctl is loosely based on the Xe model, and can handle both
  asynchronous and synchronous requests
- GPU execution context creation/destruction, tiler heap context creation
  and job submission. Those ioctls reflect how the hardware/scheduler
  works and are thus driver specific.

We also have a way to expose IO regions, such that the usermode driver
can directly access specific/well-isolate registers, like the
LATEST_FLUSH register used to implement cache-flush reduction.

This uAPI intentionally keeps usermode queues out of the scope, which
explains why doorbell registers and command stream ring-buffers are not
directly exposed to userspace.

v6:
- Add Maxime's and Heiko's acks

v5:
- Fix typo
- Add Liviu's R-b

v4:
- Add a VM_GET_STATE ioctl
- Fix doc
- Expose the CORE_FEATURES register so we can deal with variants in the
  UMD
- Add Steve's R-b

v3:
- Add the concept of sync-only VM operation
- Fix support for 32-bit userspace
- Rework drm_panthor_vm_create to pass the user VA size instead of
  the kernel VA size (suggested by Robin Murphy)
- Typo fixes
- Explicitly cast enums with top bit set to avoid compiler warnings in
  -pedantic mode.
- Drop property core_group_count as it can be easily calculated by the
  number of bits set in l2_present.

Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-2-boris.brezillon@collabora.com

Documentation/gpu/driver-uapi.rst

@@ -18,6 +18,11 @@ VM_BIND / EXEC uAPI
 
 .. kernel-doc:: include/uapi/drm/nouveau_drm.h
 
+drm/panthor uAPI
+================
+
+.. kernel-doc:: include/uapi/drm/panthor_drm.h
+
 drm/xe uAPI
 ===========
 

include/uapi/drm/panthor_drm.h

@@ -0,0 +1,945 @@
+/* SPDX-License-Identifier: MIT */
+/* Copyright (C) 2023 Collabora ltd. */
+#ifndef _PANTHOR_DRM_H_
+#define _PANTHOR_DRM_H_
+
+#include "drm.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/**
+ * DOC: Introduction
+ *
+ * This documentation describes the Panthor IOCTLs.
+ *
+ * Just a few generic rules about the data passed to the Panthor IOCTLs:
+ *
+ * - Structures must be aligned on 64-bit/8-byte. If the object is not
+ *   naturally aligned, a padding field must be added.
+ * - Fields must be explicitly aligned to their natural type alignment with
+ *   pad[0..N] fields.
+ * - All padding fields will be checked by the driver to make sure they are
+ *   zeroed.
+ * - Flags can be added, but not removed/replaced.
+ * - New fields can be added to the main structures (the structures
+ *   directly passed to the ioctl). Those fields can be added at the end of
+ *   the structure, or replace existing padding fields. Any new field being
+ *   added must preserve the behavior that existed before those fields were
+ *   added when a value of zero is passed.
+ * - New fields can be added to indirect objects (objects pointed by the
+ *   main structure), iff those objects are passed a size to reflect the
+ *   size known by the userspace driver (see drm_panthor_obj_array::stride
+ *   or drm_panthor_dev_query::size).
+ * - If the kernel driver is too old to know some fields, those will be
+ *   ignored if zero, and otherwise rejected (and so will be zero on output).
+ * - If userspace is too old to know some fields, those will be zeroed
+ *   (input) before the structure is parsed by the kernel driver.
+ * - Each new flag/field addition must come with a driver version update so
+ *   the userspace driver doesn't have to trial and error to know which
+ *   flags are supported.
+ * - Structures should not contain unions, as this would defeat the
+ *   extensibility of such structures.
+ * - IOCTLs can't be removed or replaced. New IOCTL IDs should be placed
+ *   at the end of the drm_panthor_ioctl_id enum.
+ */
+
+/**
+ * DOC: MMIO regions exposed to userspace.
+ *
+ * .. c:macro:: DRM_PANTHOR_USER_MMIO_OFFSET
+ *
+ * File offset for all MMIO regions being exposed to userspace. Don't use
+ * this value directly, use DRM_PANTHOR_USER_<name>_OFFSET values instead.
+ * pgoffset passed to mmap2() is an unsigned long, which forces us to use a
+ * different offset on 32-bit and 64-bit systems.
+ *
+ * .. c:macro:: DRM_PANTHOR_USER_FLUSH_ID_MMIO_OFFSET
+ *
+ * File offset for the LATEST_FLUSH_ID register. The Userspace driver controls
+ * GPU cache flushing through CS instructions, but the flush reduction
+ * mechanism requires a flush_id. This flush_id could be queried with an
+ * ioctl, but Arm provides a well-isolated register page containing only this
+ * read-only register, so let's expose this page through a static mmap offset
+ * and allow direct mapping of this MMIO region so we can avoid the
+ * user <-> kernel round-trip.
+ */
+#define DRM_PANTHOR_USER_MMIO_OFFSET_32BIT	(1ull << 43)
+#define DRM_PANTHOR_USER_MMIO_OFFSET_64BIT	(1ull << 56)
+#define DRM_PANTHOR_USER_MMIO_OFFSET		(sizeof(unsigned long) < 8 ? \
+						 DRM_PANTHOR_USER_MMIO_OFFSET_32BIT : \
+						 DRM_PANTHOR_USER_MMIO_OFFSET_64BIT)
+#define DRM_PANTHOR_USER_FLUSH_ID_MMIO_OFFSET	(DRM_PANTHOR_USER_MMIO_OFFSET | 0)
+
+/**
+ * DOC: IOCTL IDs
+ *
+ * enum drm_panthor_ioctl_id - IOCTL IDs
+ *
+ * Place new ioctls at the end, don't re-order, don't replace or remove entries.
+ *
+ * These IDs are not meant to be used directly. Use the DRM_IOCTL_PANTHOR_xxx
+ * definitions instead.
+ */
+enum drm_panthor_ioctl_id {
+	/** @DRM_PANTHOR_DEV_QUERY: Query device information. */
+	DRM_PANTHOR_DEV_QUERY = 0,
+
+	/** @DRM_PANTHOR_VM_CREATE: Create a VM. */
+	DRM_PANTHOR_VM_CREATE,
+
+	/** @DRM_PANTHOR_VM_DESTROY: Destroy a VM. */
+	DRM_PANTHOR_VM_DESTROY,
+
+	/** @DRM_PANTHOR_VM_BIND: Bind/unbind memory to a VM. */
+	DRM_PANTHOR_VM_BIND,
+
+	/** @DRM_PANTHOR_VM_GET_STATE: Get VM state. */
+	DRM_PANTHOR_VM_GET_STATE,
+
+	/** @DRM_PANTHOR_BO_CREATE: Create a buffer object. */
+	DRM_PANTHOR_BO_CREATE,
+
+	/**
+	 * @DRM_PANTHOR_BO_MMAP_OFFSET: Get the file offset to pass to
+	 * mmap to map a GEM object.
+	 */
+	DRM_PANTHOR_BO_MMAP_OFFSET,
+
+	/** @DRM_PANTHOR_GROUP_CREATE: Create a scheduling group. */
+	DRM_PANTHOR_GROUP_CREATE,
+
+	/** @DRM_PANTHOR_GROUP_DESTROY: Destroy a scheduling group. */
+	DRM_PANTHOR_GROUP_DESTROY,
+
+	/**
+	 * @DRM_PANTHOR_GROUP_SUBMIT: Submit jobs to queues belonging
+	 * to a specific scheduling group.
+	 */
+	DRM_PANTHOR_GROUP_SUBMIT,
+
+	/** @DRM_PANTHOR_GROUP_GET_STATE: Get the state of a scheduling group. */
+	DRM_PANTHOR_GROUP_GET_STATE,
+
+	/** @DRM_PANTHOR_TILER_HEAP_CREATE: Create a tiler heap. */
+	DRM_PANTHOR_TILER_HEAP_CREATE,
+
+	/** @DRM_PANTHOR_TILER_HEAP_DESTROY: Destroy a tiler heap. */
+	DRM_PANTHOR_TILER_HEAP_DESTROY,
+};
+
+/**
+ * DRM_IOCTL_PANTHOR() - Build a Panthor IOCTL number
+ * @__access: Access type. Must be R, W or RW.
+ * @__id: One of the DRM_PANTHOR_xxx id.
+ * @__type: Suffix of the type being passed to the IOCTL.
+ *
+ * Don't use this macro directly, use the DRM_IOCTL_PANTHOR_xxx
+ * values instead.
+ *
+ * Return: An IOCTL number to be passed to ioctl() from userspace.
+ */
+#define DRM_IOCTL_PANTHOR(__access, __id, __type) \
+	DRM_IO ## __access(DRM_COMMAND_BASE + DRM_PANTHOR_ ## __id, \
+			   struct drm_panthor_ ## __type)
+
+#define DRM_IOCTL_PANTHOR_DEV_QUERY \
+	DRM_IOCTL_PANTHOR(WR, DEV_QUERY, dev_query)
+#define DRM_IOCTL_PANTHOR_VM_CREATE \
+	DRM_IOCTL_PANTHOR(WR, VM_CREATE, vm_create)
+#define DRM_IOCTL_PANTHOR_VM_DESTROY \
+	DRM_IOCTL_PANTHOR(WR, VM_DESTROY, vm_destroy)
+#define DRM_IOCTL_PANTHOR_VM_BIND \
+	DRM_IOCTL_PANTHOR(WR, VM_BIND, vm_bind)
+#define DRM_IOCTL_PANTHOR_VM_GET_STATE \
+	DRM_IOCTL_PANTHOR(WR, VM_GET_STATE, vm_get_state)
+#define DRM_IOCTL_PANTHOR_BO_CREATE \
+	DRM_IOCTL_PANTHOR(WR, BO_CREATE, bo_create)
+#define DRM_IOCTL_PANTHOR_BO_MMAP_OFFSET \
+	DRM_IOCTL_PANTHOR(WR, BO_MMAP_OFFSET, bo_mmap_offset)
+#define DRM_IOCTL_PANTHOR_GROUP_CREATE \
+	DRM_IOCTL_PANTHOR(WR, GROUP_CREATE, group_create)
+#define DRM_IOCTL_PANTHOR_GROUP_DESTROY \
+	DRM_IOCTL_PANTHOR(WR, GROUP_DESTROY, group_destroy)
+#define DRM_IOCTL_PANTHOR_GROUP_SUBMIT \
+	DRM_IOCTL_PANTHOR(WR, GROUP_SUBMIT, group_submit)
+#define DRM_IOCTL_PANTHOR_GROUP_GET_STATE \
+	DRM_IOCTL_PANTHOR(WR, GROUP_GET_STATE, group_get_state)
+#define DRM_IOCTL_PANTHOR_TILER_HEAP_CREATE \
+	DRM_IOCTL_PANTHOR(WR, TILER_HEAP_CREATE, tiler_heap_create)
+#define DRM_IOCTL_PANTHOR_TILER_HEAP_DESTROY \
+	DRM_IOCTL_PANTHOR(WR, TILER_HEAP_DESTROY, tiler_heap_destroy)
+
+/**
+ * DOC: IOCTL arguments
+ */
+
+/**
+ * struct drm_panthor_obj_array - Object array.
+ *
+ * This object is used to pass an array of objects whose size is subject to changes in
+ * future versions of the driver. In order to support this mutability, we pass a stride
+ * describing the size of the object as known by userspace.
+ *
+ * You shouldn't fill drm_panthor_obj_array fields directly. You should instead use
+ * the DRM_PANTHOR_OBJ_ARRAY() macro that takes care of initializing the stride to
+ * the object size.
+ */
+struct drm_panthor_obj_array {
+	/** @stride: Stride of object struct. Used for versioning. */
+	__u32 stride;
+
+	/** @count: Number of objects in the array. */
+	__u32 count;
+
+	/** @array: User pointer to an array of objects. */
+	__u64 array;
+};
+
+/**
+ * DRM_PANTHOR_OBJ_ARRAY() - Initialize a drm_panthor_obj_array field.
+ * @cnt: Number of elements in the array.
+ * @ptr: Pointer to the array to pass to the kernel.
+ *
+ * Macro initializing a drm_panthor_obj_array based on the object size as known
+ * by userspace.
+ */
+#define DRM_PANTHOR_OBJ_ARRAY(cnt, ptr) \
+	{ .stride = sizeof((ptr)[0]), .count = (cnt), .array = (__u64)(uintptr_t)(ptr) }
+
+/**
+ * enum drm_panthor_sync_op_flags - Synchronization operation flags.
+ */
+enum drm_panthor_sync_op_flags {
+	/** @DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_MASK: Synchronization handle type mask. */
+	DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_MASK = 0xff,
+
+	/** @DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_SYNCOBJ: Synchronization object type. */
+	DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_SYNCOBJ = 0,
+
+	/**
+	 * @DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_TIMELINE_SYNCOBJ: Timeline synchronization
+	 * object type.
+	 */
+	DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_TIMELINE_SYNCOBJ = 1,
+
+	/** @DRM_PANTHOR_SYNC_OP_WAIT: Wait operation. */
+	DRM_PANTHOR_SYNC_OP_WAIT = 0 << 31,
+
+	/** @DRM_PANTHOR_SYNC_OP_SIGNAL: Signal operation. */
+	DRM_PANTHOR_SYNC_OP_SIGNAL = (int)(1u << 31),
+};
+
+/**
+ * struct drm_panthor_sync_op - Synchronization operation.
+ */
+struct drm_panthor_sync_op {
+	/** @flags: Synchronization operation flags. Combination of DRM_PANTHOR_SYNC_OP values. */
+	__u32 flags;
+
+	/** @handle: Sync handle. */
+	__u32 handle;
+
+	/**
+	 * @timeline_value: MBZ if
+	 * (flags & DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_MASK) !=
+	 * DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_TIMELINE_SYNCOBJ.
+	 */
+	__u64 timeline_value;
+};
+
+/**
+ * enum drm_panthor_dev_query_type - Query type
+ *
+ * Place new types at the end, don't re-order, don't remove or replace.
+ */
+enum drm_panthor_dev_query_type {
+	/** @DRM_PANTHOR_DEV_QUERY_GPU_INFO: Query GPU information. */
+	DRM_PANTHOR_DEV_QUERY_GPU_INFO = 0,
+
+	/** @DRM_PANTHOR_DEV_QUERY_CSIF_INFO: Query command-stream interface information. */
+	DRM_PANTHOR_DEV_QUERY_CSIF_INFO,
+};
+
+/**
+ * struct drm_panthor_gpu_info - GPU information
+ *
+ * Structure grouping all queryable information relating to the GPU.
+ */
+struct drm_panthor_gpu_info {
+	/** @gpu_id : GPU ID. */
+	__u32 gpu_id;
+#define DRM_PANTHOR_ARCH_MAJOR(x)		((x) >> 28)
+#define DRM_PANTHOR_ARCH_MINOR(x)		(((x) >> 24) & 0xf)
+#define DRM_PANTHOR_ARCH_REV(x)			(((x) >> 20) & 0xf)
+#define DRM_PANTHOR_PRODUCT_MAJOR(x)		(((x) >> 16) & 0xf)
+#define DRM_PANTHOR_VERSION_MAJOR(x)		(((x) >> 12) & 0xf)
+#define DRM_PANTHOR_VERSION_MINOR(x)		(((x) >> 4) & 0xff)
+#define DRM_PANTHOR_VERSION_STATUS(x)		((x) & 0xf)
+
+	/** @gpu_rev: GPU revision. */
+	__u32 gpu_rev;
+
+	/** @csf_id: Command stream frontend ID. */
+	__u32 csf_id;
+#define DRM_PANTHOR_CSHW_MAJOR(x)		(((x) >> 26) & 0x3f)
+#define DRM_PANTHOR_CSHW_MINOR(x)		(((x) >> 20) & 0x3f)
+#define DRM_PANTHOR_CSHW_REV(x)			(((x) >> 16) & 0xf)
+#define DRM_PANTHOR_MCU_MAJOR(x)		(((x) >> 10) & 0x3f)
+#define DRM_PANTHOR_MCU_MINOR(x)		(((x) >> 4) & 0x3f)
+#define DRM_PANTHOR_MCU_REV(x)			((x) & 0xf)
+
+	/** @l2_features: L2-cache features. */
+	__u32 l2_features;
+
+	/** @tiler_features: Tiler features. */
+	__u32 tiler_features;
+
+	/** @mem_features: Memory features. */
+	__u32 mem_features;
+
+	/** @mmu_features: MMU features. */
+	__u32 mmu_features;
+#define DRM_PANTHOR_MMU_VA_BITS(x)		((x) & 0xff)
+
+	/** @thread_features: Thread features. */
+	__u32 thread_features;
+
+	/** @max_threads: Maximum number of threads. */
+	__u32 max_threads;
+
+	/** @thread_max_workgroup_size: Maximum workgroup size. */
+	__u32 thread_max_workgroup_size;
+
+	/**
+	 * @thread_max_barrier_size: Maximum number of threads that can wait
+	 * simultaneously on a barrier.
+	 */
+	__u32 thread_max_barrier_size;
+
+	/** @coherency_features: Coherency features. */
+	__u32 coherency_features;
+
+	/** @texture_features: Texture features. */
+	__u32 texture_features[4];
+
+	/** @as_present: Bitmask encoding the number of address-space exposed by the MMU. */
+	__u32 as_present;
+
+	/** @shader_present: Bitmask encoding the shader cores exposed by the GPU. */
+	__u64 shader_present;
+
+	/** @l2_present: Bitmask encoding the L2 caches exposed by the GPU. */
+	__u64 l2_present;
+
+	/** @tiler_present: Bitmask encoding the tiler units exposed by the GPU. */
+	__u64 tiler_present;
+
+	/* @core_features: Used to discriminate core variants when they exist. */
+	__u32 core_features;
+
+	/* @pad: MBZ. */
+	__u32 pad;
+};
+
+/**
+ * struct drm_panthor_csif_info - Command stream interface information
+ *
+ * Structure grouping all queryable information relating to the command stream interface.
+ */
+struct drm_panthor_csif_info {
+	/** @csg_slot_count: Number of command stream group slots exposed by the firmware. */
+	__u32 csg_slot_count;
+
+	/** @cs_slot_count: Number of command stream slots per group. */
+	__u32 cs_slot_count;
+
+	/** @cs_reg_count: Number of command stream registers. */
+	__u32 cs_reg_count;
+
+	/** @scoreboard_slot_count: Number of scoreboard slots. */
+	__u32 scoreboard_slot_count;
+
+	/**
+	 * @unpreserved_cs_reg_count: Number of command stream registers reserved by
+	 * the kernel driver to call a userspace command stream.
+	 *
+	 * All registers can be used by a userspace command stream, but the
+	 * [cs_slot_count - unpreserved_cs_reg_count .. cs_slot_count] registers are
+	 * used by the kernel when DRM_PANTHOR_IOCTL_GROUP_SUBMIT is called.
+	 */
+	__u32 unpreserved_cs_reg_count;
+
+	/**
+	 * @pad: Padding field, set to zero.
+	 */
+	__u32 pad;
+};
+
+/**
+ * struct drm_panthor_dev_query - Arguments passed to DRM_PANTHOR_IOCTL_DEV_QUERY
+ */
+struct drm_panthor_dev_query {
+	/** @type: the query type (see drm_panthor_dev_query_type). */
+	__u32 type;
+
+	/**
+	 * @size: size of the type being queried.
+	 *
+	 * If pointer is NULL, size is updated by the driver to provide the
+	 * output structure size. If pointer is not NULL, the driver will
+	 * only copy min(size, actual_structure_size) bytes to the pointer,
+	 * and update the size accordingly. This allows us to extend query
+	 * types without breaking userspace.
+	 */
+	__u32 size;
+
+	/**
+	 * @pointer: user pointer to a query type struct.
+	 *
+	 * Pointer can be NULL, in which case, nothing is copied, but the
+	 * actual structure size is returned. If not NULL, it must point to
+	 * a location that's large enough to hold size bytes.
+	 */
+	__u64 pointer;
+};
+
+/**
+ * struct drm_panthor_vm_create - Arguments passed to DRM_PANTHOR_IOCTL_VM_CREATE
+ */
+struct drm_panthor_vm_create {
+	/** @flags: VM flags, MBZ. */
+	__u32 flags;
+
+	/** @id: Returned VM ID. */
+	__u32 id;
+
+	/**
+	 * @user_va_range: Size of the VA space reserved for user objects.
+	 *
+	 * The kernel will pick the remaining space to map kernel-only objects to the
+	 * VM (heap chunks, heap context, ring buffers, kernel synchronization objects,
+	 * ...). If the space left for kernel objects is too small, kernel object
+	 * allocation will fail further down the road. One can use
+	 * drm_panthor_gpu_info::mmu_features to extract the total virtual address
+	 * range, and chose a user_va_range that leaves some space to the kernel.
+	 *
+	 * If user_va_range is zero, the kernel will pick a sensible value based on
+	 * TASK_SIZE and the virtual range supported by the GPU MMU (the kernel/user
+	 * split should leave enough VA space for userspace processes to support SVM,
+	 * while still allowing the kernel to map some amount of kernel objects in
+	 * the kernel VA range). The value chosen by the driver will be returned in
+	 * @user_va_range.
+	 *
+	 * User VA space always starts at 0x0, kernel VA space is always placed after
+	 * the user VA range.
+	 */
+	__u64 user_va_range;
+};
+
+/**
+ * struct drm_panthor_vm_destroy - Arguments passed to DRM_PANTHOR_IOCTL_VM_DESTROY
+ */
+struct drm_panthor_vm_destroy {
+	/** @id: ID of the VM to destroy. */
+	__u32 id;
+
+	/** @pad: MBZ. */
+	__u32 pad;
+};
+
+/**
+ * enum drm_panthor_vm_bind_op_flags - VM bind operation flags
+ */
+enum drm_panthor_vm_bind_op_flags {
+	/**
+	 * @DRM_PANTHOR_VM_BIND_OP_MAP_READONLY: Map the memory read-only.
+	 *
+	 * Only valid with DRM_PANTHOR_VM_BIND_OP_TYPE_MAP.
+	 */
+	DRM_PANTHOR_VM_BIND_OP_MAP_READONLY = 1 << 0,
+
+	/**
+	 * @DRM_PANTHOR_VM_BIND_OP_MAP_NOEXEC: Map the memory not-executable.
+	 *
+	 * Only valid with DRM_PANTHOR_VM_BIND_OP_TYPE_MAP.
+	 */
+	DRM_PANTHOR_VM_BIND_OP_MAP_NOEXEC = 1 << 1,
+
+	/**
+	 * @DRM_PANTHOR_VM_BIND_OP_MAP_UNCACHED: Map the memory uncached.
+	 *
+	 * Only valid with DRM_PANTHOR_VM_BIND_OP_TYPE_MAP.
+	 */
+	DRM_PANTHOR_VM_BIND_OP_MAP_UNCACHED = 1 << 2,
+
+	/**
+	 * @DRM_PANTHOR_VM_BIND_OP_TYPE_MASK: Mask used to determine the type of operation.
+	 */
+	DRM_PANTHOR_VM_BIND_OP_TYPE_MASK = (int)(0xfu << 28),
+
+	/** @DRM_PANTHOR_VM_BIND_OP_TYPE_MAP: Map operation. */
+	DRM_PANTHOR_VM_BIND_OP_TYPE_MAP = 0 << 28,
+
+	/** @DRM_PANTHOR_VM_BIND_OP_TYPE_UNMAP: Unmap operation. */
+	DRM_PANTHOR_VM_BIND_OP_TYPE_UNMAP = 1 << 28,
+
+	/**
+	 * @DRM_PANTHOR_VM_BIND_OP_TYPE_SYNC_ONLY: No VM operation.
+	 *
+	 * Just serves as a synchronization point on a VM queue.
+	 *
+	 * Only valid if %DRM_PANTHOR_VM_BIND_ASYNC is set in drm_panthor_vm_bind::flags,
+	 * and drm_panthor_vm_bind_op::syncs contains at least one element.
+	 */
+	DRM_PANTHOR_VM_BIND_OP_TYPE_SYNC_ONLY = 2 << 28,
+};
+
+/**
+ * struct drm_panthor_vm_bind_op - VM bind operation
+ */
+struct drm_panthor_vm_bind_op {
+	/** @flags: Combination of drm_panthor_vm_bind_op_flags flags. */
+	__u32 flags;
+
+	/**
+	 * @bo_handle: Handle of the buffer object to map.
+	 * MBZ for unmap or sync-only operations.
+	 */
+	__u32 bo_handle;
+
+	/**
+	 * @bo_offset: Buffer object offset.
+	 * MBZ for unmap or sync-only operations.
+	 */
+	__u64 bo_offset;
+
+	/**
+	 * @va: Virtual address to map/unmap.
+	 * MBZ for sync-only operations.
+	 */
+	__u64 va;
+
+	/**
+	 * @size: Size to map/unmap.
+	 * MBZ for sync-only operations.
+	 */
+	__u64 size;
+
+	/**
+	 * @syncs: Array of struct drm_panthor_sync_op synchronization
+	 * operations.
+	 *
+	 * This array must be empty if %DRM_PANTHOR_VM_BIND_ASYNC is not set on
+	 * the drm_panthor_vm_bind object containing this VM bind operation.
+	 *
+	 * This array shall not be empty for sync-only operations.
+	 */
+	struct drm_panthor_obj_array syncs;
+
+};
+
+/**
+ * enum drm_panthor_vm_bind_flags - VM bind flags
+ */
+enum drm_panthor_vm_bind_flags {
+	/**
+	 * @DRM_PANTHOR_VM_BIND_ASYNC: VM bind operations are queued to the VM
+	 * queue instead of being executed synchronously.
+	 */
+	DRM_PANTHOR_VM_BIND_ASYNC = 1 << 0,
+};
+
+/**
+ * struct drm_panthor_vm_bind - Arguments passed to DRM_IOCTL_PANTHOR_VM_BIND
+ */
+struct drm_panthor_vm_bind {
+	/** @vm_id: VM targeted by the bind request. */
+	__u32 vm_id;
+
+	/** @flags: Combination of drm_panthor_vm_bind_flags flags. */
+	__u32 flags;
+
+	/** @ops: Array of struct drm_panthor_vm_bind_op bind operations. */
+	struct drm_panthor_obj_array ops;
+};
+
+/**
+ * enum drm_panthor_vm_state - VM states.
+ */
+enum drm_panthor_vm_state {
+	/**
+	 * @DRM_PANTHOR_VM_STATE_USABLE: VM is usable.
+	 *
+	 * New VM operations will be accepted on this VM.
+	 */
+	DRM_PANTHOR_VM_STATE_USABLE,
+
+	/**
+	 * @DRM_PANTHOR_VM_STATE_UNUSABLE: VM is unusable.
+	 *
+	 * Something put the VM in an unusable state (like an asynchronous
+	 * VM_BIND request failing for any reason).
+	 *
+	 * Once the VM is in this state, all new MAP operations will be
+	 * rejected, and any GPU job targeting this VM will fail.
+	 * UNMAP operations are still accepted.
+	 *
+	 * The only way to recover from an unusable VM is to create a new
+	 * VM, and destroy the old one.
+	 */
+	DRM_PANTHOR_VM_STATE_UNUSABLE,
+};
+
+/**
+ * struct drm_panthor_vm_get_state - Get VM state.
+ */
+struct drm_panthor_vm_get_state {
+	/** @vm_id: VM targeted by the get_state request. */
+	__u32 vm_id;
+
+	/**
+	 * @state: state returned by the driver.
+	 *
+	 * Must be one of the enum drm_panthor_vm_state values.
+	 */
+	__u32 state;
+};
+
+/**
+ * enum drm_panthor_bo_flags - Buffer object flags, passed at creation time.
+ */
+enum drm_panthor_bo_flags {
+	/** @DRM_PANTHOR_BO_NO_MMAP: The buffer object will never be CPU-mapped in userspace. */
+	DRM_PANTHOR_BO_NO_MMAP = (1 << 0),
+};
+
+/**
+ * struct drm_panthor_bo_create - Arguments passed to DRM_IOCTL_PANTHOR_BO_CREATE.
+ */
+struct drm_panthor_bo_create {
+	/**
+	 * @size: Requested size for the object
+	 *
+	 * The (page-aligned) allocated size for the object will be returned.
+	 */
+	__u64 size;
+
+	/**
+	 * @flags: Flags. Must be a combination of drm_panthor_bo_flags flags.
+	 */
+	__u32 flags;
+
+	/**
+	 * @exclusive_vm_id: Exclusive VM this buffer object will be mapped to.
+	 *
+	 * If not zero, the field must refer to a valid VM ID, and implies that:
+	 *  - the buffer object will only ever be bound to that VM
+	 *  - cannot be exported as a PRIME fd
+	 */
+	__u32 exclusive_vm_id;
+
+	/**
+	 * @handle: Returned handle for the object.
+	 *
+	 * Object handles are nonzero.
+	 */
+	__u32 handle;
+
+	/** @pad: MBZ. */
+	__u32 pad;
+};
+
+/**
+ * struct drm_panthor_bo_mmap_offset - Arguments passed to DRM_IOCTL_PANTHOR_BO_MMAP_OFFSET.
+ */
+struct drm_panthor_bo_mmap_offset {
+	/** @handle: Handle of the object we want an mmap offset for. */
+	__u32 handle;
+
+	/** @pad: MBZ. */
+	__u32 pad;
+
+	/** @offset: The fake offset to use for subsequent mmap calls. */
+	__u64 offset;
+};
+
+/**
+ * struct drm_panthor_queue_create - Queue creation arguments.
+ */
+struct drm_panthor_queue_create {
+	/**
+	 * @priority: Defines the priority of queues inside a group. Goes from 0 to 15,
+	 * 15 being the highest priority.
+	 */
+	__u8 priority;
+
+	/** @pad: Padding fields, MBZ. */
+	__u8 pad[3];
+
+	/** @ringbuf_size: Size of the ring buffer to allocate to this queue. */
+	__u32 ringbuf_size;
+};
+
+/**
+ * enum drm_panthor_group_priority - Scheduling group priority
+ */
+enum drm_panthor_group_priority {
+	/** @PANTHOR_GROUP_PRIORITY_LOW: Low priority group. */
+	PANTHOR_GROUP_PRIORITY_LOW = 0,
+
+	/** @PANTHOR_GROUP_PRIORITY_MEDIUM: Medium priority group. */
+	PANTHOR_GROUP_PRIORITY_MEDIUM,
+
+	/** @PANTHOR_GROUP_PRIORITY_HIGH: High priority group. */
+	PANTHOR_GROUP_PRIORITY_HIGH,
+};
+
+/**
+ * struct drm_panthor_group_create - Arguments passed to DRM_IOCTL_PANTHOR_GROUP_CREATE
+ */
+struct drm_panthor_group_create {
+	/** @queues: Array of drm_panthor_queue_create elements. */
+	struct drm_panthor_obj_array queues;
+
+	/**
+	 * @max_compute_cores: Maximum number of cores that can be used by compute
+	 * jobs across CS queues bound to this group.
+	 *
+	 * Must be less or equal to the number of bits set in @compute_core_mask.
+	 */
+	__u8 max_compute_cores;
+
+	/**
+	 * @max_fragment_cores: Maximum number of cores that can be used by fragment
+	 * jobs across CS queues bound to this group.
+	 *
+	 * Must be less or equal to the number of bits set in @fragment_core_mask.
+	 */
+	__u8 max_fragment_cores;
+
+	/**
+	 * @max_tiler_cores: Maximum number of tilers that can be used by tiler jobs
+	 * across CS queues bound to this group.
+	 *
+	 * Must be less or equal to the number of bits set in @tiler_core_mask.
+	 */
+	__u8 max_tiler_cores;
+
+	/** @priority: Group priority (see enum drm_panthor_group_priority). */
+	__u8 priority;
+
+	/** @pad: Padding field, MBZ. */
+	__u32 pad;
+
+	/**
+	 * @compute_core_mask: Mask encoding cores that can be used for compute jobs.
+	 *
+	 * This field must have at least @max_compute_cores bits set.
+	 *
+	 * The bits set here should also be set in drm_panthor_gpu_info::shader_present.
+	 */
+	__u64 compute_core_mask;
+
+	/**
+	 * @fragment_core_mask: Mask encoding cores that can be used for fragment jobs.
+	 *
+	 * This field must have at least @max_fragment_cores bits set.
+	 *
+	 * The bits set here should also be set in drm_panthor_gpu_info::shader_present.
+	 */
+	__u64 fragment_core_mask;
+
+	/**
+	 * @tiler_core_mask: Mask encoding cores that can be used for tiler jobs.
+	 *
+	 * This field must have at least @max_tiler_cores bits set.
+	 *
+	 * The bits set here should also be set in drm_panthor_gpu_info::tiler_present.
+	 */
+	__u64 tiler_core_mask;
+
+	/**
+	 * @vm_id: VM ID to bind this group to.
+	 *
+	 * All submission to queues bound to this group will use this VM.
+	 */
+	__u32 vm_id;
+
+	/**
+	 * @group_handle: Returned group handle. Passed back when submitting jobs or
+	 * destroying a group.
+	 */
+	__u32 group_handle;
+};
+
+/**
+ * struct drm_panthor_group_destroy - Arguments passed to DRM_IOCTL_PANTHOR_GROUP_DESTROY
+ */
+struct drm_panthor_group_destroy {
+	/** @group_handle: Group to destroy */
+	__u32 group_handle;
+
+	/** @pad: Padding field, MBZ. */
+	__u32 pad;
+};
+
+/**
+ * struct drm_panthor_queue_submit - Job submission arguments.
+ *
+ * This is describing the userspace command stream to call from the kernel
+ * command stream ring-buffer. Queue submission is always part of a group
+ * submission, taking one or more jobs to submit to the underlying queues.
+ */
+struct drm_panthor_queue_submit {
+	/** @queue_index: Index of the queue inside a group. */
+	__u32 queue_index;
+
+	/**
+	 * @stream_size: Size of the command stream to execute.
+	 *
+	 * Must be 64-bit/8-byte aligned (the size of a CS instruction)
+	 *
+	 * Can be zero if stream_addr is zero too.
+	 */
+	__u32 stream_size;
+
+	/**
+	 * @stream_addr: GPU address of the command stream to execute.
+	 *
+	 * Must be aligned on 64-byte.
+	 *
+	 * Can be zero is stream_size is zero too.
+	 */
+	__u64 stream_addr;
+
+	/**
+	 * @latest_flush: FLUSH_ID read at the time the stream was built.
+	 *
+	 * This allows cache flush elimination for the automatic
+	 * flush+invalidate(all) done at submission time, which is needed to
+	 * ensure the GPU doesn't get garbage when reading the indirect command
+	 * stream buffers. If you want the cache flush to happen
+	 * unconditionally, pass a zero here.
+	 */
+	__u32 latest_flush;
+
+	/** @pad: MBZ. */
+	__u32 pad;
+
+	/** @syncs: Array of struct drm_panthor_sync_op sync operations. */
+	struct drm_panthor_obj_array syncs;
+};
+
+/**
+ * struct drm_panthor_group_submit - Arguments passed to DRM_IOCTL_PANTHOR_GROUP_SUBMIT
+ */
+struct drm_panthor_group_submit {
+	/** @group_handle: Handle of the group to queue jobs to. */
+	__u32 group_handle;
+
+	/** @pad: MBZ. */
+	__u32 pad;
+
+	/** @queue_submits: Array of drm_panthor_queue_submit objects. */
+	struct drm_panthor_obj_array queue_submits;
+};
+
+/**
+ * enum drm_panthor_group_state_flags - Group state flags
+ */
+enum drm_panthor_group_state_flags {
+	/**
+	 * @DRM_PANTHOR_GROUP_STATE_TIMEDOUT: Group had unfinished jobs.
+	 *
+	 * When a group ends up with this flag set, no jobs can be submitted to its queues.
+	 */
+	DRM_PANTHOR_GROUP_STATE_TIMEDOUT = 1 << 0,
+
+	/**
+	 * @DRM_PANTHOR_GROUP_STATE_FATAL_FAULT: Group had fatal faults.
+	 *
+	 * When a group ends up with this flag set, no jobs can be submitted to its queues.
+	 */
+	DRM_PANTHOR_GROUP_STATE_FATAL_FAULT = 1 << 1,
+};
+
+/**
+ * struct drm_panthor_group_get_state - Arguments passed to DRM_IOCTL_PANTHOR_GROUP_GET_STATE
+ *
+ * Used to query the state of a group and decide whether a new group should be created to
+ * replace it.
+ */
+struct drm_panthor_group_get_state {
+	/** @group_handle: Handle of the group to query state on */
+	__u32 group_handle;
+
+	/**
+	 * @state: Combination of DRM_PANTHOR_GROUP_STATE_* flags encoding the
+	 * group state.
+	 */
+	__u32 state;
+
+	/** @fatal_queues: Bitmask of queues that faced fatal faults. */
+	__u32 fatal_queues;
+
+	/** @pad: MBZ */
+	__u32 pad;
+};
+
+/**
+ * struct drm_panthor_tiler_heap_create - Arguments passed to DRM_IOCTL_PANTHOR_TILER_HEAP_CREATE
+ */
+struct drm_panthor_tiler_heap_create {
+	/** @vm_id: VM ID the tiler heap should be mapped to */
+	__u32 vm_id;
+
+	/** @initial_chunk_count: Initial number of chunks to allocate. */
+	__u32 initial_chunk_count;
+
+	/** @chunk_size: Chunk size. Must be a power of two at least 256KB large. */
+	__u32 chunk_size;
+
+	/** @max_chunks: Maximum number of chunks that can be allocated. */
+	__u32 max_chunks;
+
+	/**
+	 * @target_in_flight: Maximum number of in-flight render passes.
+	 *
+	 * If the heap has more than tiler jobs in-flight, the FW will wait for render
+	 * passes to finish before queuing new tiler jobs.
+	 */
+	__u32 target_in_flight;
+
+	/** @handle: Returned heap handle. Passed back to DESTROY_TILER_HEAP. */
+	__u32 handle;
+
+	/** @tiler_heap_ctx_gpu_va: Returned heap GPU virtual address returned */
+	__u64 tiler_heap_ctx_gpu_va;
+
+	/**
+	 * @first_heap_chunk_gpu_va: First heap chunk.
+	 *
+	 * The tiler heap is formed of heap chunks forming a single-link list. This
+	 * is the first element in the list.
+	 */
+	__u64 first_heap_chunk_gpu_va;
+};
+
+/**
+ * struct drm_panthor_tiler_heap_destroy - Arguments passed to DRM_IOCTL_PANTHOR_TILER_HEAP_DESTROY
+ */
+struct drm_panthor_tiler_heap_destroy {
+	/** @handle: Handle of the tiler heap to destroy */
+	__u32 handle;
+
+	/** @pad: Padding field, MBZ. */
+	__u32 pad;
+};
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* _PANTHOR_DRM_H_ */