drivers/staging/media/atomisp/pci/atomisp2/include/hmm/hmm_vm.h

   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  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  * 02110-1301, USA.
  21  *
  22  */
  23
  24 #ifndef __HMM_VM_H__
  25 #define __HMM_VM_H__
  26
  27 #include <linux/kernel.h>
  28 #include <linux/types.h>
  29 #include <linux/mutex.h>
  30 #include <linux/list.h>
  31
  32 struct hmm_vm {
  33         unsigned int start;
  34         unsigned int pgnr;
  35         unsigned int size;
  36         struct list_head vm_node_list;
  37         spinlock_t lock;
  38         struct kmem_cache *cache;
  39 };
  40
  41 struct hmm_vm_node {
  42         struct list_head list;
  43         unsigned int start;
  44         unsigned int pgnr;
  45         unsigned int size;
  46         struct hmm_vm *vm;
  47 };
  48 #define ISP_VM_START    0x0
  49 #define ISP_VM_SIZE     (0x7FFFFFFF)    /* 2G address space */
  50 #define ISP_PTR_NULL    NULL
  51
  52 int hmm_vm_init(struct hmm_vm *vm, unsigned int start,
  53                 unsigned int size);
  54
  55 void hmm_vm_clean(struct hmm_vm *vm);
  56
  57 struct hmm_vm_node *hmm_vm_alloc_node(struct hmm_vm *vm,
  58                 unsigned int pgnr);
  59
  60 void hmm_vm_free_node(struct hmm_vm_node *node);
  61
  62 struct hmm_vm_node *hmm_vm_find_node_start(struct hmm_vm *vm,
  63                 unsigned int addr);
  64
  65 struct hmm_vm_node *hmm_vm_find_node_in_range(struct hmm_vm *vm,
  66                 unsigned int addr);
  67
  68 #endif