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8a1cc07578
Anything relating to GEM object management is placed here. Nothing particularly interesting here, given the implementation is based on drm_gem_shmem_object, which is doing most of the work. v6: - Add Maxime's and Heiko's acks - Return a page-aligned BO size to userspace when creating a BO - Keep header inclusion alphabetically ordered v5: - Add Liviu's and Steve's R-b v4: - Force kernel BOs to be GPU mapped - Make panthor_kernel_bo_destroy() robust against ERR/NULL BO pointers to simplify the call sites v3: - Add acks for the MIT/GPL2 relicensing - Provide a panthor_kernel_bo abstraction for buffer objects managed by the kernel (will replace panthor_fw_mem and be used everywhere we were using panthor_gem_create_and_map() before) - Adjust things to match drm_gpuvm changes - Change return of panthor_gem_create_with_handle() to int 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> Acked-by: Steven Price <steven.price@arm.com> # MIT+GPL2 relicensing,Arm Acked-by: Grant Likely <grant.likely@linaro.org> # MIT+GPL2 relicensing,Linaro Acked-by: Boris Brezillon <boris.brezillon@collabora.com> # MIT+GPL2 relicensing,Collabora Reviewed-by: Liviu Dudau <liviu.dudau@arm.com> Reviewed-by: Steven Price <steven.price@arm.com> Acked-by: Maxime Ripard <mripard@kernel.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Link: https://patchwork.freedesktop.org/patch/msgid/20240229162230.2634044-6-boris.brezillon@collabora.com
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 or MIT */
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/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
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/* Copyright 2023 Collabora ltd. */
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#ifndef __PANTHOR_GEM_H__
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#define __PANTHOR_GEM_H__
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_mm.h>
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#include <linux/iosys-map.h>
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#include <linux/rwsem.h>
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struct panthor_vm;
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/**
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* struct panthor_gem_object - Driver specific GEM object.
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*/
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struct panthor_gem_object {
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/** @base: Inherit from drm_gem_shmem_object. */
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struct drm_gem_shmem_object base;
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/**
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* @exclusive_vm_root_gem: Root GEM of the exclusive VM this GEM object
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* is attached to.
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*
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* If @exclusive_vm_root_gem != NULL, any attempt to bind the GEM to a
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* different VM will fail.
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*
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* All FW memory objects have this field set to the root GEM of the MCU
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* VM.
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*/
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struct drm_gem_object *exclusive_vm_root_gem;
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/**
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* @gpuva_list_lock: Custom GPUVA lock.
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*
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* Used to protect insertion of drm_gpuva elements to the
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* drm_gem_object.gpuva.list list.
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*
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* We can't use the GEM resv for that, because drm_gpuva_link() is
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* called in a dma-signaling path, where we're not allowed to take
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* resv locks.
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*/
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struct mutex gpuva_list_lock;
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/** @flags: Combination of drm_panthor_bo_flags flags. */
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u32 flags;
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};
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/**
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* struct panthor_kernel_bo - Kernel buffer object.
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*
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* These objects are only manipulated by the kernel driver and not
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* directly exposed to the userspace. The GPU address of a kernel
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* BO might be passed to userspace though.
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*/
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struct panthor_kernel_bo {
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/**
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* @obj: The GEM object backing this kernel buffer object.
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*/
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struct drm_gem_object *obj;
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/**
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* @va_node: VA space allocated to this GEM.
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*/
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struct drm_mm_node va_node;
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/**
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* @kmap: Kernel CPU mapping of @gem.
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*/
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void *kmap;
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};
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static inline
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struct panthor_gem_object *to_panthor_bo(struct drm_gem_object *obj)
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{
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return container_of(to_drm_gem_shmem_obj(obj), struct panthor_gem_object, base);
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}
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struct drm_gem_object *panthor_gem_create_object(struct drm_device *ddev, size_t size);
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struct drm_gem_object *
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panthor_gem_prime_import_sg_table(struct drm_device *ddev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt);
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int
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panthor_gem_create_with_handle(struct drm_file *file,
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struct drm_device *ddev,
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struct panthor_vm *exclusive_vm,
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u64 *size, u32 flags, uint32_t *handle);
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static inline u64
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panthor_kernel_bo_gpuva(struct panthor_kernel_bo *bo)
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{
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return bo->va_node.start;
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}
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static inline size_t
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panthor_kernel_bo_size(struct panthor_kernel_bo *bo)
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{
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return bo->obj->size;
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}
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static inline int
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panthor_kernel_bo_vmap(struct panthor_kernel_bo *bo)
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{
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struct iosys_map map;
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int ret;
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if (bo->kmap)
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return 0;
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ret = drm_gem_vmap_unlocked(bo->obj, &map);
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if (ret)
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return ret;
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bo->kmap = map.vaddr;
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return 0;
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}
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static inline void
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panthor_kernel_bo_vunmap(struct panthor_kernel_bo *bo)
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{
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if (bo->kmap) {
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struct iosys_map map = IOSYS_MAP_INIT_VADDR(bo->kmap);
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drm_gem_vunmap_unlocked(bo->obj, &map);
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bo->kmap = NULL;
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}
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}
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struct panthor_kernel_bo *
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panthor_kernel_bo_create(struct panthor_device *ptdev, struct panthor_vm *vm,
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size_t size, u32 bo_flags, u32 vm_map_flags,
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u64 gpu_va);
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void panthor_kernel_bo_destroy(struct panthor_vm *vm,
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struct panthor_kernel_bo *bo);
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#endif /* __PANTHOR_GEM_H__ */
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