1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/gpu/drm/lima/lima_vm.h b/drivers/gpu/drm/lima/lima_vm.h
new file mode 100644
index 000000000000..caee2f8a29b4
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_vm.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
+
+#ifndef __LIMA_VM_H__
+#define __LIMA_VM_H__
+
+#include <drm/drm_mm.h>
+#include <linux/kref.h>
+
+#define LIMA_PAGE_SIZE    4096
+#define LIMA_PAGE_MASK    (LIMA_PAGE_SIZE - 1)
+#define LIMA_PAGE_ENT_NUM (LIMA_PAGE_SIZE / sizeof(u32))
+
+#define LIMA_VM_NUM_PT_PER_BT_SHIFT 3
+#define LIMA_VM_NUM_PT_PER_BT (1 << LIMA_VM_NUM_PT_PER_BT_SHIFT)
+#define LIMA_VM_NUM_BT (LIMA_PAGE_ENT_NUM >> LIMA_VM_NUM_PT_PER_BT_SHIFT)
+
+#define LIMA_VA_RESERVE_START  0xFFF00000
+#define LIMA_VA_RESERVE_DLBU   LIMA_VA_RESERVE_START
+#define LIMA_VA_RESERVE_END    0x100000000
+
+struct lima_device;
+
+struct lima_vm_page {
+	u32 *cpu;
+	dma_addr_t dma;
+};
+
+struct lima_vm {
+	struct mutex lock;
+	struct kref refcount;
+
+	struct drm_mm mm;
+
+	struct lima_device *dev;
+
+	struct lima_vm_page pd;
+	struct lima_vm_page bts[LIMA_VM_NUM_BT];
+};
+
+int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create);
+void lima_vm_bo_del(struct lima_vm *vm, struct lima_bo *bo);
+
+u32 lima_vm_get_va(struct lima_vm *vm, struct lima_bo *bo);
+
+struct lima_vm *lima_vm_create(struct lima_device *dev);
+void lima_vm_release(struct kref *kref);
+
+static inline struct lima_vm *lima_vm_get(struct lima_vm *vm)
+{
+	kref_get(&vm->refcount);
+	return vm;
+}
+
+static inline void lima_vm_put(struct lima_vm *vm)
+{
+	kref_put(&vm->refcount, lima_vm_release);
+}
+
+void lima_vm_print(struct lima_vm *vm);
+
+#endif