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Diffstat (limited to 'include/linux/msm_iommu_domains.h')
| -rw-r--r-- | include/linux/msm_iommu_domains.h | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/include/linux/msm_iommu_domains.h b/include/linux/msm_iommu_domains.h new file mode 100644 index 000000000000..811d7737ddb5 --- /dev/null +++ b/include/linux/msm_iommu_domains.h @@ -0,0 +1,239 @@ +/* + * 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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