diff options
Diffstat (limited to 'include/rdma/ib_umem_odp.h')
| -rw-r--r-- | include/rdma/ib_umem_odp.h | 86 |
1 files changed, 14 insertions, 72 deletions
diff --git a/include/rdma/ib_umem_odp.h b/include/rdma/ib_umem_odp.h index 253df1a1fa54..81429acc8257 100644 --- a/include/rdma/ib_umem_odp.h +++ b/include/rdma/ib_umem_odp.h @@ -35,11 +35,11 @@ #include <rdma/ib_umem.h> #include <rdma/ib_verbs.h> -#include <linux/interval_tree.h> struct ib_umem_odp { struct ib_umem umem; - struct ib_ucontext_per_mm *per_mm; + struct mmu_interval_notifier notifier; + struct pid *tgid; /* * An array of the pages included in the on-demand paging umem. @@ -62,13 +62,8 @@ struct ib_umem_odp { struct mutex umem_mutex; void *private; /* for the HW driver to use. */ - int notifiers_seq; - int notifiers_count; int npages; - /* Tree tracking */ - struct interval_tree_node interval_tree; - /* * An implicit odp umem cannot be DMA mapped, has 0 length, and serves * only as an anchor for the driver to hold onto the per_mm. FIXME: @@ -77,10 +72,7 @@ struct ib_umem_odp { */ bool is_implicit_odp; - struct completion notifier_completion; - int dying; unsigned int page_shift; - struct work_struct work; }; static inline struct ib_umem_odp *to_ib_umem_odp(struct ib_umem *umem) @@ -91,13 +83,13 @@ static inline struct ib_umem_odp *to_ib_umem_odp(struct ib_umem *umem) /* Returns the first page of an ODP umem. */ static inline unsigned long ib_umem_start(struct ib_umem_odp *umem_odp) { - return umem_odp->interval_tree.start; + return umem_odp->notifier.interval_tree.start; } /* Returns the address of the page after the last one of an ODP umem. */ static inline unsigned long ib_umem_end(struct ib_umem_odp *umem_odp) { - return umem_odp->interval_tree.last + 1; + return umem_odp->notifier.interval_tree.last + 1; } static inline size_t ib_umem_odp_num_pages(struct ib_umem_odp *umem_odp) @@ -121,21 +113,15 @@ static inline size_t ib_umem_odp_num_pages(struct ib_umem_odp *umem_odp) #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING -struct ib_ucontext_per_mm { - struct mmu_notifier mn; - struct pid *tgid; - - struct rb_root_cached umem_tree; - /* Protects umem_tree */ - struct rw_semaphore umem_rwsem; -}; - -struct ib_umem_odp *ib_umem_odp_get(struct ib_udata *udata, unsigned long addr, - size_t size, int access); +struct ib_umem_odp * +ib_umem_odp_get(struct ib_udata *udata, unsigned long addr, size_t size, + int access, const struct mmu_interval_notifier_ops *ops); struct ib_umem_odp *ib_umem_odp_alloc_implicit(struct ib_udata *udata, int access); -struct ib_umem_odp *ib_umem_odp_alloc_child(struct ib_umem_odp *root_umem, - unsigned long addr, size_t size); +struct ib_umem_odp * +ib_umem_odp_alloc_child(struct ib_umem_odp *root_umem, unsigned long addr, + size_t size, + const struct mmu_interval_notifier_ops *ops); void ib_umem_odp_release(struct ib_umem_odp *umem_odp); int ib_umem_odp_map_dma_pages(struct ib_umem_odp *umem_odp, u64 start_offset, @@ -145,55 +131,11 @@ int ib_umem_odp_map_dma_pages(struct ib_umem_odp *umem_odp, u64 start_offset, void ib_umem_odp_unmap_dma_pages(struct ib_umem_odp *umem_odp, u64 start_offset, u64 bound); -typedef int (*umem_call_back)(struct ib_umem_odp *item, u64 start, u64 end, - void *cookie); -/* - * Call the callback on each ib_umem in the range. Returns the logical or of - * the return values of the functions called. - */ -int rbt_ib_umem_for_each_in_range(struct rb_root_cached *root, - u64 start, u64 end, - umem_call_back cb, - bool blockable, void *cookie); - -/* - * Find first region intersecting with address range. - * Return NULL if not found - */ -static inline struct ib_umem_odp * -rbt_ib_umem_lookup(struct rb_root_cached *root, u64 addr, u64 length) -{ - struct interval_tree_node *node; - - node = interval_tree_iter_first(root, addr, addr + length - 1); - if (!node) - return NULL; - return container_of(node, struct ib_umem_odp, interval_tree); - -} - -static inline int ib_umem_mmu_notifier_retry(struct ib_umem_odp *umem_odp, - unsigned long mmu_seq) -{ - /* - * This code is strongly based on the KVM code from - * mmu_notifier_retry. Should be called with - * the relevant locks taken (umem_odp->umem_mutex - * and the ucontext umem_mutex semaphore locked for read). - */ - - if (unlikely(umem_odp->notifiers_count)) - return 1; - if (umem_odp->notifiers_seq != mmu_seq) - return 1; - return 0; -} - #else /* CONFIG_INFINIBAND_ON_DEMAND_PAGING */ -static inline struct ib_umem_odp *ib_umem_odp_get(struct ib_udata *udata, - unsigned long addr, - size_t size, int access) +static inline struct ib_umem_odp * +ib_umem_odp_get(struct ib_udata *udata, unsigned long addr, size_t size, + int access, const struct mmu_interval_notifier_ops *ops) { return ERR_PTR(-EINVAL); } |