drm/lima/lima_vm.h

0001 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
0002 /* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
0003
0004 #ifndef __LIMA_VM_H__
0005 #define __LIMA_VM_H__
0006
0007 #include <drm/drm_mm.h>
0008 #include <linux/kref.h>
0009
0010 #define LIMA_PAGE_SIZE    4096
0011 #define LIMA_PAGE_MASK    (LIMA_PAGE_SIZE - 1)
0012 #define LIMA_PAGE_ENT_NUM (LIMA_PAGE_SIZE / sizeof(u32))
0013
0014 #define LIMA_VM_NUM_PT_PER_BT_SHIFT 3
0015 #define LIMA_VM_NUM_PT_PER_BT (1 << LIMA_VM_NUM_PT_PER_BT_SHIFT)
0016 #define LIMA_VM_NUM_BT (LIMA_PAGE_ENT_NUM >> LIMA_VM_NUM_PT_PER_BT_SHIFT)
0017
0018 #define LIMA_VA_RESERVE_START  0x0FFF00000ULL
0019 #define LIMA_VA_RESERVE_DLBU   LIMA_VA_RESERVE_START
0020 #define LIMA_VA_RESERVE_END    0x100000000ULL
0021
0022 struct lima_device;
0023
0024 struct lima_vm_page {
0025     u32 *cpu;
0026     dma_addr_t dma;
0027 };
0028
0029 struct lima_vm {
0030     struct mutex lock;
0031     struct kref refcount;
0032
0033     struct drm_mm mm;
0034
0035     struct lima_device *dev;
0036
0037     struct lima_vm_page pd;
0038     struct lima_vm_page bts[LIMA_VM_NUM_BT];
0039 };
0040
0041 int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create);
0042 void lima_vm_bo_del(struct lima_vm *vm, struct lima_bo *bo);
0043
0044 u32 lima_vm_get_va(struct lima_vm *vm, struct lima_bo *bo);
0045
0046 struct lima_vm *lima_vm_create(struct lima_device *dev);
0047 void lima_vm_release(struct kref *kref);
0048
0049 static inline struct lima_vm *lima_vm_get(struct lima_vm *vm)
0050 {
0051     kref_get(&vm->refcount);
0052     return vm;
0053 }
0054
0055 static inline void lima_vm_put(struct lima_vm *vm)
0056 {
0057     if (vm)
0058         kref_put(&vm->refcount, lima_vm_release);
0059 }
0060
0061 void lima_vm_print(struct lima_vm *vm);
0062 int lima_vm_map_bo(struct lima_vm *vm, struct lima_bo *bo, int pageoff);
0063
0064 #endif