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/*
* omap dmm user: virtual address space management
*
* Copyright (C) 2010-2011 Texas Instruments
*
* Written by Hari Kanigeri <h-kanigeri2@ti.com>
* Ramesh Gupta <grgupta@ti.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.
*/
#include <linux/device.h>
#include <linux/cdev.h>
#include <linux/dma-mapping.h>
#ifndef __DMM_USER_MMAP_H
#define __DMM_USER_MMAP_H
#define DMM_IOC_MAGIC 'V'
#define DMM_IOCSETTLBENT _IO(DMM_IOC_MAGIC, 0)
#define DMM_IOCMEMMAP _IO(DMM_IOC_MAGIC, 1)
#define DMM_IOCMEMUNMAP _IO(DMM_IOC_MAGIC, 2)
#define DMM_IOCDATOPA _IO(DMM_IOC_MAGIC, 3)
#define DMM_IOCMEMFLUSH _IO(DMM_IOC_MAGIC, 4)
#define DMM_IOCMEMINV _IO(DMM_IOC_MAGIC, 5)
#define DMM_IOCCREATEPOOL _IO(DMM_IOC_MAGIC, 6)
#define DMM_IOCDELETEPOOL _IO(DMM_IOC_MAGIC, 7)
#define IOMMU_IOCEVENTREG _IO(DMM_IOC_MAGIC, 10)
#define IOMMU_IOCEVENTUNREG _IO(DMM_IOC_MAGIC, 11)
#define DMM_DA_ANON 0x1
#define DMM_DA_PHYS 0x2
#define DMM_DA_USER 0x4
struct iovmm_pool {
u32 pool_id;
u32 da_begin;
u32 da_end;
struct gen_pool *genpool;
struct list_head list;
};
struct iovmm_pool_info {
u32 pool_id;
u32 da_begin;
u32 da_end;
u32 size;
u32 flags;
};
/* used to cache dma mapping information */
struct device_dma_map_info {
/* number of elements requested by us */
int num_pages;
/* list of buffers used in this DMA action */
struct scatterlist *sg;
};
struct dmm_map_info {
u32 mpu_addr;
u32 *da;
u32 num_of_buf;
u32 size;
u32 pool_id;
u32 flags;
};
struct dmm_dma_info {
void *pva;
u32 ul_size;
enum dma_data_direction dir;
};
struct dmm_map_object {
struct list_head link;
u32 da;
u32 va;
u32 size;
u32 num_usr_pgs;
struct gen_pool *gen_pool;
struct page **pages;
struct device_dma_map_info dma_info;
};
struct iodmm_struct {
struct iovmm_device *iovmm;
struct list_head map_list;
u32 pool_id;
pid_t tgid;
};
struct iovmm_device {
/* iommu object which this belongs to */
struct iommu *iommu;
const char *name;
/* List of memory pool it manages */
struct list_head mmap_pool;
struct mutex dmm_map_lock;
int minor;
struct cdev cdev;
int refcount;
};
/* user dmm functions */
int dmm_user(struct iodmm_struct *obj, void __user *args);
void user_remove_resources(struct iodmm_struct *obj);
int user_un_map(struct iodmm_struct *obj, const void __user *args);
int proc_begin_dma(struct iodmm_struct *obj, const void __user *args);
int proc_end_dma(struct iodmm_struct *obj, const void __user *args);
int omap_create_dmm_pool(struct iodmm_struct *obj, const void __user *args);
int omap_delete_dmm_pools(struct iodmm_struct *obj);
int program_tlb_entry(struct iodmm_struct *obj, const void __user *args);
int register_mmufault(struct iodmm_struct *obj, const void __user *args);
int unregister_mmufault(struct iodmm_struct *obj, const void __user *args);
#endif
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