diff options
Diffstat (limited to 'drivers/infiniband/core/rdma_core.h')
| -rw-r--r-- | drivers/infiniband/core/rdma_core.h | 158 |
1 files changed, 136 insertions, 22 deletions
diff --git a/drivers/infiniband/core/rdma_core.h b/drivers/infiniband/core/rdma_core.h index 1b82e7ff7fe8..a59b087611cb 100644 --- a/drivers/infiniband/core/rdma_core.h +++ b/drivers/infiniband/core/rdma_core.h @@ -39,40 +39,154 @@ #include <linux/idr.h> #include <rdma/uverbs_types.h> +#include <rdma/uverbs_ioctl.h> #include <rdma/ib_verbs.h> #include <linux/mutex.h> +struct ib_uverbs_device; + +void uverbs_destroy_ufile_hw(struct ib_uverbs_file *ufile, + enum rdma_remove_reason reason); + +int uobj_destroy(struct ib_uobject *uobj, struct uverbs_attr_bundle *attrs); + /* - * These functions initialize the context and cleanups its uobjects. - * The context has a list of objects which is protected by a mutex - * on the context. initialize_ucontext should be called when we create - * a context. - * cleanup_ucontext removes all uobjects from the context and puts them. + * Get an ib_uobject that corresponds to the given id from ufile, assuming + * the object is from the given type. Lock it to the required access when + * applicable. + * This function could create (access == NEW), destroy (access == DESTROY) + * or unlock (access == READ || access == WRITE) objects if required. + * The action will be finalized only when uverbs_finalize_object or + * uverbs_finalize_objects are called. */ -void uverbs_cleanup_ucontext(struct ib_ucontext *ucontext, bool device_removed); -void uverbs_initialize_ucontext(struct ib_ucontext *ucontext); +struct ib_uobject * +uverbs_get_uobject_from_file(u16 object_id, enum uverbs_obj_access access, + s64 id, struct uverbs_attr_bundle *attrs); + +void uverbs_finalize_object(struct ib_uobject *uobj, + enum uverbs_obj_access access, bool hw_obj_valid, + bool commit, struct uverbs_attr_bundle *attrs); + +int uverbs_output_written(const struct uverbs_attr_bundle *bundle, size_t idx); + +void setup_ufile_idr_uobject(struct ib_uverbs_file *ufile); +void release_ufile_idr_uobject(struct ib_uverbs_file *ufile); + +struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs); /* - * uverbs_uobject_get is called in order to increase the reference count on - * an uobject. This is useful when a handler wants to keep the uobject's memory - * alive, regardless if this uobject is still alive in the context's objects - * repository. Objects are put via uverbs_uobject_put. + * This is the runtime description of the uverbs API, used by the syscall + * machinery to validate and dispatch calls. */ -void uverbs_uobject_get(struct ib_uobject *uobject); /* - * In order to indicate we no longer needs this uobject, uverbs_uobject_put - * is called. When the reference count is decreased, the uobject is freed. - * For example, this is used when attaching a completion channel to a CQ. + * Depending on ID the slot pointer in the radix tree points at one of these + * structs. */ -void uverbs_uobject_put(struct ib_uobject *uobject); -/* Indicate this fd is no longer used by this consumer, but its memory isn't - * necessarily released yet. When the last reference is put, we release the - * memory. After this call is executed, calling uverbs_uobject_get isn't - * allowed. - * This must be called from the release file_operations of the file! +struct uverbs_api_ioctl_method { + int(__rcu *handler)(struct uverbs_attr_bundle *attrs); + DECLARE_BITMAP(attr_mandatory, UVERBS_API_ATTR_BKEY_LEN); + u16 bundle_size; + u8 use_stack:1; + u8 driver_method:1; + u8 disabled:1; + u8 has_udata:1; + u8 key_bitmap_len; + u8 destroy_bkey; +}; + +struct uverbs_api_write_method { + int (*handler)(struct uverbs_attr_bundle *attrs); + u8 disabled:1; + u8 is_ex:1; + u8 has_udata:1; + u8 has_resp:1; + u8 req_size; + u8 resp_size; +}; + +struct uverbs_api_attr { + struct uverbs_attr_spec spec; +}; + +struct uverbs_api { + /* radix tree contains struct uverbs_api_* pointers */ + struct radix_tree_root radix; + enum rdma_driver_id driver_id; + + unsigned int num_write; + unsigned int num_write_ex; + struct uverbs_api_write_method notsupp_method; + const struct uverbs_api_write_method **write_methods; + const struct uverbs_api_write_method **write_ex_methods; +}; + +/* + * Get an uverbs_api_object that corresponds to the given object_id. + * Note: + * -ENOMSG means that any object is allowed to match during lookup. */ -void uverbs_close_fd(struct file *f); +static inline const struct uverbs_api_object * +uapi_get_object(struct uverbs_api *uapi, u16 object_id) +{ + const struct uverbs_api_object *res; + + if (object_id == UVERBS_IDR_ANY_OBJECT) + return ERR_PTR(-ENOMSG); + + res = radix_tree_lookup(&uapi->radix, uapi_key_obj(object_id)); + if (!res) + return ERR_PTR(-ENOENT); + + return res; +} + +char *uapi_key_format(char *S, unsigned int key); +struct uverbs_api *uverbs_alloc_api(struct ib_device *ibdev); +void uverbs_disassociate_api_pre(struct ib_uverbs_device *uverbs_dev); +void uverbs_disassociate_api(struct uverbs_api *uapi); +void uverbs_destroy_api(struct uverbs_api *uapi); +void uapi_compute_bundle_size(struct uverbs_api_ioctl_method *method_elm, + unsigned int num_attrs); +void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile); + +extern const struct uapi_definition uverbs_def_obj_async_fd[]; +extern const struct uapi_definition uverbs_def_obj_counters[]; +extern const struct uapi_definition uverbs_def_obj_cq[]; +extern const struct uapi_definition uverbs_def_obj_device[]; +extern const struct uapi_definition uverbs_def_obj_dm[]; +extern const struct uapi_definition uverbs_def_obj_dmah[]; +extern const struct uapi_definition uverbs_def_obj_flow_action[]; +extern const struct uapi_definition uverbs_def_obj_intf[]; +extern const struct uapi_definition uverbs_def_obj_mr[]; +extern const struct uapi_definition uverbs_def_obj_qp[]; +extern const struct uapi_definition uverbs_def_obj_srq[]; +extern const struct uapi_definition uverbs_def_obj_wq[]; +extern const struct uapi_definition uverbs_def_write_intf[]; + +static inline const struct uverbs_api_write_method * +uapi_get_method(const struct uverbs_api *uapi, u32 command) +{ + u32 cmd_idx = command & IB_USER_VERBS_CMD_COMMAND_MASK; + + if (command & ~(u32)(IB_USER_VERBS_CMD_FLAG_EXTENDED | + IB_USER_VERBS_CMD_COMMAND_MASK)) + return ERR_PTR(-EINVAL); + + if (command & IB_USER_VERBS_CMD_FLAG_EXTENDED) { + if (cmd_idx >= uapi->num_write_ex) + return ERR_PTR(-EOPNOTSUPP); + return uapi->write_ex_methods[cmd_idx]; + } + + if (cmd_idx >= uapi->num_write) + return ERR_PTR(-EOPNOTSUPP); + return uapi->write_methods[cmd_idx]; +} + +void uverbs_fill_udata(struct uverbs_attr_bundle *bundle, + struct ib_udata *udata, unsigned int attr_in, + unsigned int attr_out); #endif /* RDMA_CORE_H */ |