207 lines
4.8 KiB
C
207 lines
4.8 KiB
C
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/* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _ARCH_IOMMU_DOMAINS_H
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#define _ARCH_IOMMU_DOMAINS_H
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#include <linux/errno.h>
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#include <linux/memory_alloc.h>
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#define MSM_IOMMU_DOMAIN_SECURE 0x1
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enum {
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VIDEO_DOMAIN,
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CAMERA_DOMAIN,
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DISPLAY_READ_DOMAIN,
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DISPLAY_WRITE_DOMAIN,
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ROTATOR_SRC_DOMAIN,
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ROTATOR_DST_DOMAIN,
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MAX_DOMAINS
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};
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enum {
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VIDEO_FIRMWARE_POOL,
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VIDEO_MAIN_POOL,
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GEN_POOL,
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};
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struct msm_iommu_domain_name {
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char *name;
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int domain;
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};
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struct msm_iommu_domain {
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/* iommu domain to map in */
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struct iommu_domain *domain;
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/* total number of allocations from this domain */
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atomic_t allocation_cnt;
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/* number of iova pools */
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int npools;
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/*
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* array of gen_pools for allocating iovas.
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* behavior is undefined if these overlap
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*/
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struct mem_pool *iova_pools;
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};
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struct iommu_domains_pdata {
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struct msm_iommu_domain *domains;
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int ndomains;
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struct msm_iommu_domain_name *domain_names;
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int nnames;
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unsigned int domain_alloc_flags;
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};
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struct msm_iova_partition {
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unsigned long start;
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unsigned long size;
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};
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struct msm_iova_layout {
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struct msm_iova_partition *partitions;
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int npartitions;
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const char *client_name;
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unsigned int domain_flags;
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unsigned int is_secure;
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};
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#if defined(CONFIG_MSM_IOMMU)
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extern void msm_iommu_set_client_name(struct iommu_domain *domain,
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char const *name);
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extern struct iommu_domain *msm_get_iommu_domain(int domain_num);
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extern int msm_find_domain_no(const struct iommu_domain *domain);
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extern int msm_allocate_iova_address(unsigned int iommu_domain,
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unsigned int partition_no,
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unsigned long size,
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unsigned long align,
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unsigned long *iova);
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extern void msm_free_iova_address(unsigned long iova,
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unsigned int iommu_domain,
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unsigned int partition_no,
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unsigned long size);
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extern int msm_use_iommu(void);
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extern int msm_iommu_map_extra(struct iommu_domain *domain,
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unsigned long start_iova,
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phys_addr_t phys_addr,
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unsigned long size,
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unsigned long page_size,
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int cached);
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extern void msm_iommu_unmap_extra(struct iommu_domain *domain,
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unsigned long start_iova,
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unsigned long size,
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unsigned long page_size);
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extern int msm_iommu_map_contig_buffer(phys_addr_t phys,
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unsigned int domain_no,
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unsigned int partition_no,
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unsigned long size,
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unsigned long align,
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unsigned long cached,
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unsigned long *iova_val);
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extern void msm_iommu_unmap_contig_buffer(unsigned long iova,
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unsigned int domain_no,
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unsigned int partition_no,
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unsigned long size);
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extern int msm_register_domain(struct msm_iova_layout *layout);
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extern int msm_unregister_domain(struct iommu_domain *domain);
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#else
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static inline void msm_iommu_set_client_name(struct iommu_domain *domain,
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char const *name)
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{
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}
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static inline struct iommu_domain
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*msm_get_iommu_domain(int subsys_id) { return NULL; }
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static inline int msm_find_domain_no(const struct iommu_domain *domain)
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{
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return -EINVAL;
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}
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static inline int msm_allocate_iova_address(unsigned int iommu_domain,
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unsigned int partition_no,
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unsigned long size,
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unsigned long align,
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unsigned long *iova) { return -ENOMEM; }
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static inline void msm_free_iova_address(unsigned long iova,
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unsigned int iommu_domain,
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unsigned int partition_no,
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unsigned long size) { return; }
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static inline int msm_use_iommu(void)
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{
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return 0;
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}
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static inline int msm_iommu_map_extra(struct iommu_domain *domain,
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unsigned long start_iova,
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phys_addr_t phys_addr,
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unsigned long size,
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unsigned long page_size,
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int cached)
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{
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return -ENODEV;
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}
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static inline void msm_iommu_unmap_extra(struct iommu_domain *domain,
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unsigned long start_iova,
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unsigned long size,
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unsigned long page_size)
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{
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}
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static inline int msm_iommu_map_contig_buffer(phys_addr_t phys,
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unsigned int domain_no,
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unsigned int partition_no,
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unsigned long size,
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unsigned long align,
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unsigned long cached,
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unsigned long *iova_val)
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{
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*iova_val = phys;
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return 0;
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}
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static inline void msm_iommu_unmap_contig_buffer(unsigned long iova,
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unsigned int domain_no,
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unsigned int partition_no,
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unsigned long size)
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{
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return;
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}
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static inline int msm_register_domain(struct msm_iova_layout *layout)
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{
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return -ENODEV;
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}
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static inline int msm_unregister_domain(struct iommu_domain *domain)
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{
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return -ENODEV;
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}
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#endif
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#endif
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