1 /* 2 * Support for Medifield PNW Camera Imaging ISP subsystem. 3 * 4 * Copyright (c) 2010 Intel Corporation. All Rights Reserved. 5 * 6 * Copyright (c) 2010 Silicon Hive www.siliconhive.com. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License version 10 * 2 as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * 18 */ 19 20 #ifndef __HMM_H__ 21 #define __HMM_H__ 22 23 #include <linux/kernel.h> 24 #include <linux/types.h> 25 #include <linux/slab.h> 26 #include <linux/mm.h> 27 28 #include "hmm/hmm_pool.h" 29 #include "ia_css_types.h" 30 31 int hmm_pool_register(unsigned int pool_size, enum hmm_pool_type pool_type); 32 void hmm_pool_unregister(enum hmm_pool_type pool_type); 33 34 int hmm_init(void); 35 void hmm_cleanup(void); 36 37 ia_css_ptr hmm_alloc(size_t bytes, enum hmm_bo_type type, 38 int from_highmem, const void __user *userptr, 39 const uint16_t attrs); 40 void hmm_free(ia_css_ptr ptr); 41 int hmm_load(ia_css_ptr virt, void *data, unsigned int bytes); 42 int hmm_store(ia_css_ptr virt, const void *data, unsigned int bytes); 43 int hmm_set(ia_css_ptr virt, int c, unsigned int bytes); 44 int hmm_flush(ia_css_ptr virt, unsigned int bytes); 45 46 /* 47 * get kernel memory physical address from ISP virtual address. 48 */ 49 phys_addr_t hmm_virt_to_phys(ia_css_ptr virt); 50 51 /* 52 * map ISP memory starts with virt to kernel virtual address 53 * by using vmap. return NULL if failed. 54 * 55 * virt must be the start address of ISP memory (return by hmm_alloc), 56 * do not pass any other address. 57 */ 58 void *hmm_vmap(ia_css_ptr virt, bool cached); 59 void hmm_vunmap(ia_css_ptr virt); 60 61 /* 62 * flush the cache for the vmapped buffer. 63 * if the buffer has not been vmapped, return directly. 64 */ 65 void hmm_flush_vmap(ia_css_ptr virt); 66 67 /* 68 * Address translation from ISP shared memory address to kernel virtual address 69 * if the memory is not vmmaped, then do it. 70 */ 71 void *hmm_isp_vaddr_to_host_vaddr(ia_css_ptr ptr, bool cached); 72 73 /* 74 * Address translation from kernel virtual address to ISP shared memory address 75 */ 76 ia_css_ptr hmm_host_vaddr_to_hrt_vaddr(const void *ptr); 77 78 /* 79 * map ISP memory starts with virt to specific vma. 80 * 81 * used for mmap operation. 82 * 83 * virt must be the start address of ISP memory (return by hmm_alloc), 84 * do not pass any other address. 85 */ 86 int hmm_mmap(struct vm_area_struct *vma, ia_css_ptr virt); 87 88 /* show memory statistic 89 */ 90 void hmm_show_mem_stat(const char *func, const int line); 91 92 /* init memory statistic 93 */ 94 void hmm_init_mem_stat(int res_pgnr, int dyc_en, int dyc_pgnr); 95 96 extern bool dypool_enable; 97 extern unsigned int dypool_pgnr; 98 extern struct hmm_bo_device bo_device; 99 100 #endif 101