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24943269e5
No need to handle this check before calling lima_vm_put. Tested-by: Bhushan Shah <bshah@kde.org> Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Qiang Yu <yuq825@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200421133551.31481-4-yuq825@gmail.com
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
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#ifndef __LIMA_VM_H__
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#define __LIMA_VM_H__
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#include <drm/drm_mm.h>
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#include <linux/kref.h>
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#define LIMA_PAGE_SIZE 4096
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#define LIMA_PAGE_MASK (LIMA_PAGE_SIZE - 1)
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#define LIMA_PAGE_ENT_NUM (LIMA_PAGE_SIZE / sizeof(u32))
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#define LIMA_VM_NUM_PT_PER_BT_SHIFT 3
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#define LIMA_VM_NUM_PT_PER_BT (1 << LIMA_VM_NUM_PT_PER_BT_SHIFT)
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#define LIMA_VM_NUM_BT (LIMA_PAGE_ENT_NUM >> LIMA_VM_NUM_PT_PER_BT_SHIFT)
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#define LIMA_VA_RESERVE_START 0x0FFF00000ULL
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#define LIMA_VA_RESERVE_DLBU LIMA_VA_RESERVE_START
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#define LIMA_VA_RESERVE_END 0x100000000ULL
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struct lima_device;
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struct lima_vm_page {
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u32 *cpu;
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dma_addr_t dma;
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};
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struct lima_vm {
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struct mutex lock;
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struct kref refcount;
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struct drm_mm mm;
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struct lima_device *dev;
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struct lima_vm_page pd;
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struct lima_vm_page bts[LIMA_VM_NUM_BT];
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};
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int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create);
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void lima_vm_bo_del(struct lima_vm *vm, struct lima_bo *bo);
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u32 lima_vm_get_va(struct lima_vm *vm, struct lima_bo *bo);
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struct lima_vm *lima_vm_create(struct lima_device *dev);
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void lima_vm_release(struct kref *kref);
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static inline struct lima_vm *lima_vm_get(struct lima_vm *vm)
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{
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kref_get(&vm->refcount);
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return vm;
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}
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static inline void lima_vm_put(struct lima_vm *vm)
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{
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if (vm)
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kref_put(&vm->refcount, lima_vm_release);
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}
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void lima_vm_print(struct lima_vm *vm);
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int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff);
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#endif
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