diff options
Diffstat (limited to 'include/rdma/ib_umem.h')
| -rw-r--r-- | include/rdma/ib_umem.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/rdma/ib_umem.h b/include/rdma/ib_umem.h index 2d83cfd7e6ce2..b2e1c0808056d 100644 --- a/include/rdma/ib_umem.h +++ b/include/rdma/ib_umem.h @@ -34,6 +34,8 @@ #define IB_UMEM_H #include <linux/list.h> +#include <linux/mmu_notifier.h> +#include <linux/rbtree.h> #include <linux/scatterlist.h> #include <linux/workqueue.h> @@ -80,8 +82,23 @@ static inline size_t ib_umem_num_pages(struct ib_umem *umem) return (ib_umem_end(umem) - ib_umem_start(umem)) >> PAGE_SHIFT; } +struct ib_ummunotify_range { + unsigned long start; + unsigned long end; + struct rb_node node; +}; + #ifdef CONFIG_INFINIBAND_USER_MEM +struct ib_ummunotify_context { + struct mmu_notifier mmu_notifier; + void (*callback)(struct ib_ummunotify_context *, + struct ib_ummunotify_range *); + struct mm_struct *mm; + struct rb_root reg_tree; + spinlock_t lock; +}; + struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, size_t size, int access, int dmasync); void ib_umem_release(struct ib_umem *umem); @@ -89,10 +106,37 @@ int ib_umem_page_count(struct ib_umem *umem); int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset, size_t length); +void ib_ummunotify_register_range(struct ib_ummunotify_context *context, + struct ib_ummunotify_range *range); +void ib_ummunotify_unregister_range(struct ib_ummunotify_context *context, + struct ib_ummunotify_range *range); + +int ib_ummunotify_init_context(struct ib_ummunotify_context *context, + void (*callback)(struct ib_ummunotify_context *, + struct ib_ummunotify_range *)); +void ib_ummunotify_cleanup_context(struct ib_ummunotify_context *context); + +static inline void ib_ummunotify_clear_range(struct ib_ummunotify_range *range) +{ + RB_CLEAR_NODE(&range->node); +} + +static inline void ib_ummunotify_clear_context(struct ib_ummunotify_context *context) +{ + context->mm = NULL; +} + +static inline int ib_ummunotify_context_used(struct ib_ummunotify_context *context) +{ + return !!context->mm; +} + #else /* CONFIG_INFINIBAND_USER_MEM */ #include <linux/err.h> +struct ib_ummunotify_context; + static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr, size_t size, int access, int dmasync) { @@ -104,6 +148,23 @@ static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offs size_t length) { return -EINVAL; } + +static inline void ib_ummunotify_register_range(struct ib_ummunotify_context *context, + struct ib_ummunotify_range *range) { } +static inline void ib_ummunotify_unregister_range(struct ib_ummunotify_context *context, + struct ib_ummunotify_range *range) { } + +static inline int ib_ummunotify_init_context(struct ib_ummunotify_context *context, + void (*callback)(struct ib_ummunotify_context *, + struct ib_ummunotify_range *)) { return 0; } +static inline void ib_ummunotify_cleanup_context(struct ib_ummunotify_context *context) { } + +static inline void ib_ummunotify_clear_range(struct ib_ummunotify_range *range) { } + +static inline void ib_ummunotify_clear_context(struct ib_ummunotify_context *context) { } + +static inline int ib_ummunotify_context_used(struct ib_ummunotify_context *context) { return 0; } + #endif /* CONFIG_INFINIBAND_USER_MEM */ #endif /* IB_UMEM_H */ |