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/*
* Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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 _LINUX_MSM_IOMMU_DOMAINS_H
#define _LINUX_MSM_IOMMU_DOMAINS_H
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/genalloc.h>
#include <linux/rbtree.h>
#include <linux/dma-buf.h>
#define MSM_IOMMU_DOMAIN_SECURE 0x1
enum {
VIDEO_DOMAIN,
CAMERA_DOMAIN,
DISPLAY_READ_DOMAIN,
DISPLAY_WRITE_DOMAIN,
ROTATOR_SRC_DOMAIN,
ROTATOR_DST_DOMAIN,
MAX_DOMAINS
};
enum {
VIDEO_FIRMWARE_POOL,
VIDEO_MAIN_POOL,
GEN_POOL,
};
struct mem_pool {
struct mutex pool_mutex;
struct gen_pool *gpool;
phys_addr_t paddr;
unsigned long size;
unsigned long free;
unsigned int id;
};
struct msm_iommu_domain {
/* iommu domain to map in */
struct iommu_domain *domain;
/* total number of allocations from this domain */
atomic_t allocation_cnt;
/* number of iova pools */
int npools;
/*
* array of gen_pools for allocating iovas.
* behavior is undefined if these overlap
*/
struct mem_pool *iova_pools;
};
struct msm_iommu_domain_name {
char *name;
int domain;
};
struct iommu_domains_pdata {
struct msm_iommu_domain *domains;
int ndomains;
struct msm_iommu_domain_name *domain_names;
int nnames;
unsigned int domain_alloc_flags;
};
struct msm_iova_partition {
unsigned long start;
unsigned long size;
};
struct msm_iova_layout {
struct msm_iova_partition *partitions;
int npartitions;
const char *client_name;
unsigned int domain_flags;
unsigned int is_secure;
};
#if defined(CONFIG_QCOM_IOMMU)
extern void msm_iommu_set_client_name(struct iommu_domain *domain,
char const *name);
extern struct iommu_domain *msm_get_iommu_domain(int domain_num);
extern int msm_allocate_iova_address(unsigned int iommu_domain,
unsigned int partition_no,
unsigned long size,
unsigned long align,
unsigned long *iova);
extern void msm_free_iova_address(unsigned long iova,
unsigned int iommu_domain,
unsigned int partition_no,
unsigned long size);
extern int msm_use_iommu(void);
extern int msm_iommu_map_extra(struct iommu_domain *domain,
unsigned long start_iova,
phys_addr_t phys_addr,
unsigned long size,
unsigned long page_size,
int cached);
extern void msm_iommu_unmap_extra(struct iommu_domain *domain,
unsigned long start_iova,
unsigned long size,
unsigned long page_size);
extern int msm_iommu_map_contig_buffer(phys_addr_t phys,
unsigned int domain_no,
unsigned int partition_no,
unsigned long size,
unsigned long align,
unsigned long cached,
dma_addr_t *iova_val);
extern void msm_iommu_unmap_contig_buffer(dma_addr_t iova,
unsigned int domain_no,
unsigned int partition_no,
unsigned long size);
extern int msm_register_domain(struct msm_iova_layout *layout);
extern int msm_unregister_domain(struct iommu_domain *domain);
int msm_map_dma_buf(struct dma_buf *dma_buf, struct sg_table *table,
int domain_num, int partition_num, unsigned long align,
unsigned long iova_length, unsigned long *iova,
unsigned long *buffer_size,
unsigned long flags, unsigned long iommu_flags);
void msm_unmap_dma_buf(struct sg_table *table, int domain_num,
int partition_num);
#else
static inline void msm_iommu_set_client_name(struct iommu_domain *domain,
char const *name)
{
}
static inline struct iommu_domain *msm_get_iommu_domain(int subsys_id)
{
return NULL;
}
static inline int msm_allocate_iova_address(unsigned int iommu_domain,
unsigned int partition_no,
unsigned long size,
unsigned long align,
unsigned long *iova)
{
return -ENOMEM;
}
static inline void msm_free_iova_address(unsigned long iova,
unsigned int iommu_domain,
unsigned int partition_no,
unsigned long size) { }
static inline int msm_use_iommu(void)
{
return 0;
}
static inline int msm_iommu_map_extra(struct iommu_domain *domain,
unsigned long start_iova,
phys_addr_t phys_addr,
unsigned long size,
unsigned long page_size,
int cached)
{
return -ENODEV;
}
static inline void msm_iommu_unmap_extra(struct iommu_domain *domain,
unsigned long start_iova,
unsigned long size,
unsigned long page_size)
{
}
static inline int msm_iommu_map_contig_buffer(phys_addr_t phys,
unsigned int domain_no,
unsigned int partition_no,
unsigned long size,
unsigned long align,
unsigned long cached,
dma_addr_t *iova_val)
{
*iova_val = phys;
return 0;
}
static inline void msm_iommu_unmap_contig_buffer(dma_addr_t iova,
unsigned int domain_no,
unsigned int partition_no,
unsigned long size)
{
}
static inline int msm_register_domain(struct msm_iova_layout *layout)
{
return -ENODEV;
}
static inline int msm_unregister_domain(struct iommu_domain *domain)
{
return -ENODEV;
}
static inline int msm_map_dma_buf(struct dma_buf *dma_buf,
struct sg_table *table,
int domain_num, int partition_num,
unsigned long align,
unsigned long iova_length,
unsigned long *iova,
unsigned long *buffer_size,
unsigned long flags,
unsigned long iommu_flags)
{
return -ENODEV;
}
static inline void msm_unmap_dma_buf(struct sg_table *table, int domain_num,
int partition_num)
{
}
#endif /* CONFIG_QCOM_IOMMU */
#endif /* _LINUX_MSM_IOMMU_DOMAINS_H */
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