1 /* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. 2 * 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License version 2 and 5 * only version 2 as published by the Free Software Foundation. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 */ 12 13 #ifndef _DPU_HW_BLK_H 14 #define _DPU_HW_BLK_H 15 16 #include <linux/types.h> 17 #include <linux/list.h> 18 #include <linux/atomic.h> 19 20 struct dpu_hw_blk; 21 22 /** 23 * struct dpu_hw_blk_ops - common hardware block operations 24 * @start: start operation on first get 25 * @stop: stop operation on last put 26 */ 27 struct dpu_hw_blk_ops { 28 int (*start)(struct dpu_hw_blk *); 29 void (*stop)(struct dpu_hw_blk *); 30 }; 31 32 /** 33 * struct dpu_hw_blk - definition of hardware block object 34 * @list: list of hardware blocks 35 * @type: hardware block type 36 * @id: instance id 37 * @refcount: reference/usage count 38 */ 39 struct dpu_hw_blk { 40 struct list_head list; 41 u32 type; 42 int id; 43 atomic_t refcount; 44 struct dpu_hw_blk_ops ops; 45 }; 46 47 int dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id, 48 struct dpu_hw_blk_ops *ops); 49 void dpu_hw_blk_destroy(struct dpu_hw_blk *hw_blk); 50 51 struct dpu_hw_blk *dpu_hw_blk_get(struct dpu_hw_blk *hw_blk, u32 type, int id); 52 void dpu_hw_blk_put(struct dpu_hw_blk *hw_blk); 53 #endif /*_DPU_HW_BLK_H */ 54
