+++ /dev/null
-/*
- * Support for Medifield PNW Camera Imaging ISP subsystem.
- *
- * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
- *
- * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- *
- */
-
-#ifndef __HMM_VM_H__
-#define __HMM_VM_H__
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/mutex.h>
-#include <linux/list.h>
-
-struct hmm_vm {
- unsigned int start;
- unsigned int pgnr;
- unsigned int size;
- struct list_head vm_node_list;
- spinlock_t lock;
- struct kmem_cache *cache;
-};
-
-struct hmm_vm_node {
- struct list_head list;
- unsigned int start;
- unsigned int pgnr;
- unsigned int size;
- struct hmm_vm *vm;
-};
-
-#define ISP_VM_START 0x0
-#define ISP_VM_SIZE (0x7FFFFFFF) /* 2G address space */
-#define ISP_PTR_NULL NULL
-
-int hmm_vm_init(struct hmm_vm *vm, unsigned int start,
- unsigned int size);
-
-void hmm_vm_clean(struct hmm_vm *vm);
-
-struct hmm_vm_node *hmm_vm_alloc_node(struct hmm_vm *vm,
- unsigned int pgnr);
-
-void hmm_vm_free_node(struct hmm_vm_node *node);
-
-struct hmm_vm_node *hmm_vm_find_node_start(struct hmm_vm *vm,
- unsigned int addr);
-
-struct hmm_vm_node *hmm_vm_find_node_in_range(struct hmm_vm *vm,
- unsigned int addr);
-
-#endif
+++ /dev/null
-/*
- * Support for Medifield PNW Camera Imaging ISP subsystem.
- *
- * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
- *
- * Copyright (c) 2010 Silicon Hive www.siliconhive.com.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- *
- */
-/*
- * This file contains function for ISP virtual address management in ISP driver
- */
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <asm/page.h>
-
-#include "atomisp_internal.h"
-#include "mmu/isp_mmu.h"
-#include "hmm/hmm_vm.h"
-#include "hmm/hmm_common.h"
-
-static unsigned int vm_node_end(unsigned int start, unsigned int pgnr)
-{
- return start + pgnr_to_size(pgnr);
-}
-
-static int addr_in_vm_node(unsigned int addr,
- struct hmm_vm_node *node)
-{
- return (addr >= node->start) && (addr < (node->start + node->size));
-}
-
-int hmm_vm_init(struct hmm_vm *vm, unsigned int start,
- unsigned int size)
-{
- if (!vm)
- return -1;
-
- vm->start = start;
- vm->pgnr = size_to_pgnr_ceil(size);
- vm->size = pgnr_to_size(vm->pgnr);
-
- INIT_LIST_HEAD(&vm->vm_node_list);
- spin_lock_init(&vm->lock);
- vm->cache = kmem_cache_create("atomisp_vm", sizeof(struct hmm_vm_node),
- 0, 0, NULL);
-
- return vm->cache ? 0 : -ENOMEM;
-}
-
-void hmm_vm_clean(struct hmm_vm *vm)
-{
- struct hmm_vm_node *node, *tmp;
- struct list_head new_head;
-
- if (!vm)
- return;
-
- spin_lock(&vm->lock);
- list_replace_init(&vm->vm_node_list, &new_head);
- spin_unlock(&vm->lock);
-
- list_for_each_entry_safe(node, tmp, &new_head, list) {
- list_del(&node->list);
- kmem_cache_free(vm->cache, node);
- }
-
- kmem_cache_destroy(vm->cache);
-}
-
-static struct hmm_vm_node *alloc_hmm_vm_node(unsigned int pgnr,
- struct hmm_vm *vm)
-{
- struct hmm_vm_node *node;
-
- node = kmem_cache_alloc(vm->cache, GFP_KERNEL);
- if (!node)
- return NULL;
-
- INIT_LIST_HEAD(&node->list);
- node->pgnr = pgnr;
- node->size = pgnr_to_size(pgnr);
- node->vm = vm;
-
- return node;
-}
-
-struct hmm_vm_node *hmm_vm_alloc_node(struct hmm_vm *vm, unsigned int pgnr)
-{
- struct list_head *head;
- struct hmm_vm_node *node, *cur, *next;
- unsigned int vm_start, vm_end;
- unsigned int addr;
- unsigned int size;
-
- if (!vm)
- return NULL;
-
- vm_start = vm->start;
- vm_end = vm_node_end(vm->start, vm->pgnr);
- size = pgnr_to_size(pgnr);
-
- addr = vm_start;
- head = &vm->vm_node_list;
-
- node = alloc_hmm_vm_node(pgnr, vm);
- if (!node) {
- dev_err(atomisp_dev, "no memory to allocate hmm vm node.\n");
- return NULL;
- }
-
- spin_lock(&vm->lock);
- /*
- * if list is empty, the loop code will not be executed.
- */
- list_for_each_entry(cur, head, list) {
- /* Add gap between vm areas as helper to not hide overflow */
- addr = PAGE_ALIGN(vm_node_end(cur->start, cur->pgnr) + 1);
-
- if (list_is_last(&cur->list, head)) {
- if (addr + size > vm_end) {
- /* vm area does not have space anymore */
- spin_unlock(&vm->lock);
- kmem_cache_free(vm->cache, node);
- dev_err(atomisp_dev,
- "no enough virtual address space.\n");
- return NULL;
- }
-
- /* We still have vm space to add new node to tail */
- break;
- }
-
- next = list_entry(cur->list.next, struct hmm_vm_node, list);
- if ((next->start - addr) > size)
- break;
- }
- node->start = addr;
- node->vm = vm;
- list_add(&node->list, &cur->list);
- spin_unlock(&vm->lock);
-
- return node;
-}
-
-void hmm_vm_free_node(struct hmm_vm_node *node)
-{
- struct hmm_vm *vm;
-
- if (!node)
- return;
-
- vm = node->vm;
-
- spin_lock(&vm->lock);
- list_del(&node->list);
- spin_unlock(&vm->lock);
-
- kmem_cache_free(vm->cache, node);
-}
-
-struct hmm_vm_node *hmm_vm_find_node_start(struct hmm_vm *vm, unsigned int addr)
-{
- struct hmm_vm_node *node;
-
- if (!vm)
- return NULL;
-
- spin_lock(&vm->lock);
-
- list_for_each_entry(node, &vm->vm_node_list, list) {
- if (node->start == addr) {
- spin_unlock(&vm->lock);
- return node;
- }
- }
-
- spin_unlock(&vm->lock);
- return NULL;
-}
-
-struct hmm_vm_node *hmm_vm_find_node_in_range(struct hmm_vm *vm,
- unsigned int addr)
-{
- struct hmm_vm_node *node;
-
- if (!vm)
- return NULL;
-
- spin_lock(&vm->lock);
-
- list_for_each_entry(node, &vm->vm_node_list, list) {
- if (addr_in_vm_node(addr, node)) {
- spin_unlock(&vm->lock);
- return node;
- }
- }
-
- spin_unlock(&vm->lock);
- return NULL;
-}
projects / kernel.git / commitdiff