1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Support for Medifield PNW Camera Imaging ISP subsystem. 4 * 5 * Copyright (c) 2010 Intel Corporation. All Rights Reserved. 6 * 7 * Copyright (c) 2010 Silicon Hive www.siliconhive.com. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License version 11 * 2 as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * 19 */ 20 21#ifndef __HMM_H__ 22#define __HMM_H__ 23 24#include <linux/kernel.h> 25#include <linux/types.h> 26#include <linux/slab.h> 27#include <linux/mm.h> 28 29#include "hmm_common.h" 30#include "hmm/hmm_bo.h" 31#include "ia_css_types.h" 32 33#define mmgr_NULL ((ia_css_ptr)0) 34#define mmgr_EXCEPTION ((ia_css_ptr) - 1) 35 36int hmm_init(void); 37void hmm_cleanup(void); 38 39ia_css_ptr hmm_alloc(size_t bytes); 40ia_css_ptr hmm_create_from_vmalloc_buf(size_t bytes, void *vmalloc_addr); 41 42void hmm_free(ia_css_ptr ptr); 43int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes); 44int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes); 45int hmm_set(ia_css_ptr virt, int c, unsigned int bytes); 46int hmm_flush(ia_css_ptr virt, unsigned int bytes); 47 48/* 49 * get kernel memory physical address from ISP virtual address. 50 */ 51phys_addr_t hmm_virt_to_phys(ia_css_ptr virt); 52 53/* 54 * map ISP memory starts with virt to kernel virtual address 55 * by using vmap. return NULL if failed. 56 * 57 * virt must be the start address of ISP memory (return by hmm_alloc), 58 * do not pass any other address. 59 */ 60void *hmm_vmap(ia_css_ptr virt, bool cached); 61void hmm_vunmap(ia_css_ptr virt); 62 63/* 64 * flush the cache for the vmapped buffer. 65 * if the buffer has not been vmapped, return directly. 66 */ 67void hmm_flush_vmap(ia_css_ptr virt); 68 69/* 70 * map ISP memory starts with virt to specific vma. 71 * 72 * used for mmap operation. 73 * 74 * virt must be the start address of ISP memory (return by hmm_alloc), 75 * do not pass any other address. 76 */ 77int hmm_mmap(struct vm_area_struct *vma, ia_css_ptr virt); 78 79extern struct hmm_bo_device bo_device; 80 81#endif 82