192 lines
6.4 KiB
C
192 lines
6.4 KiB
C
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/*
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* Copyright (c) 2005 Topspin Communications. All rights reserved.
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* Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
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* Copyright (c) 2005-2017 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
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* Copyright (c) 2005 PathScale, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef RDMA_CORE_H
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#define RDMA_CORE_H
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#include <linux/idr.h>
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#include <rdma/uverbs_types.h>
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#include <rdma/uverbs_ioctl.h>
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#include <rdma/ib_verbs.h>
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#include <linux/mutex.h>
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struct ib_uverbs_device;
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void uverbs_destroy_ufile_hw(struct ib_uverbs_file *ufile,
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enum rdma_remove_reason reason);
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int uobj_destroy(struct ib_uobject *uobj, struct uverbs_attr_bundle *attrs);
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/*
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* Get an ib_uobject that corresponds to the given id from ufile, assuming
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* the object is from the given type. Lock it to the required access when
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* applicable.
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* This function could create (access == NEW), destroy (access == DESTROY)
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* or unlock (access == READ || access == WRITE) objects if required.
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* The action will be finalized only when uverbs_finalize_object or
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* uverbs_finalize_objects are called.
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*/
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struct ib_uobject *
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uverbs_get_uobject_from_file(u16 object_id, enum uverbs_obj_access access,
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s64 id, struct uverbs_attr_bundle *attrs);
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void uverbs_finalize_object(struct ib_uobject *uobj,
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enum uverbs_obj_access access, bool hw_obj_valid,
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bool commit, struct uverbs_attr_bundle *attrs);
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int uverbs_output_written(const struct uverbs_attr_bundle *bundle, size_t idx);
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void setup_ufile_idr_uobject(struct ib_uverbs_file *ufile);
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void release_ufile_idr_uobject(struct ib_uverbs_file *ufile);
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struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs);
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/*
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* This is the runtime description of the uverbs API, used by the syscall
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* machinery to validate and dispatch calls.
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*/
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/*
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* Depending on ID the slot pointer in the radix tree points at one of these
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* structs.
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*/
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struct uverbs_api_ioctl_method {
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int(__rcu *handler)(struct uverbs_attr_bundle *attrs);
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DECLARE_BITMAP(attr_mandatory, UVERBS_API_ATTR_BKEY_LEN);
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u16 bundle_size;
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u8 use_stack:1;
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u8 driver_method:1;
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u8 disabled:1;
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u8 has_udata:1;
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u8 key_bitmap_len;
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u8 destroy_bkey;
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};
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struct uverbs_api_write_method {
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int (*handler)(struct uverbs_attr_bundle *attrs);
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u8 disabled:1;
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u8 is_ex:1;
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u8 has_udata:1;
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u8 has_resp:1;
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u8 req_size;
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u8 resp_size;
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};
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struct uverbs_api_attr {
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struct uverbs_attr_spec spec;
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};
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struct uverbs_api {
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/* radix tree contains struct uverbs_api_* pointers */
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struct radix_tree_root radix;
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enum rdma_driver_id driver_id;
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unsigned int num_write;
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unsigned int num_write_ex;
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struct uverbs_api_write_method notsupp_method;
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const struct uverbs_api_write_method **write_methods;
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const struct uverbs_api_write_method **write_ex_methods;
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};
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/*
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* Get an uverbs_api_object that corresponds to the given object_id.
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* Note:
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* -ENOMSG means that any object is allowed to match during lookup.
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*/
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static inline const struct uverbs_api_object *
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uapi_get_object(struct uverbs_api *uapi, u16 object_id)
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{
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const struct uverbs_api_object *res;
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if (object_id == UVERBS_IDR_ANY_OBJECT)
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return ERR_PTR(-ENOMSG);
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res = radix_tree_lookup(&uapi->radix, uapi_key_obj(object_id));
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if (!res)
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return ERR_PTR(-ENOENT);
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return res;
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}
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char *uapi_key_format(char *S, unsigned int key);
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struct uverbs_api *uverbs_alloc_api(struct ib_device *ibdev);
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void uverbs_disassociate_api_pre(struct ib_uverbs_device *uverbs_dev);
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void uverbs_disassociate_api(struct uverbs_api *uapi);
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void uverbs_destroy_api(struct uverbs_api *uapi);
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void uapi_compute_bundle_size(struct uverbs_api_ioctl_method *method_elm,
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unsigned int num_attrs);
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void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile);
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extern const struct uapi_definition uverbs_def_obj_async_fd[];
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extern const struct uapi_definition uverbs_def_obj_counters[];
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extern const struct uapi_definition uverbs_def_obj_cq[];
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extern const struct uapi_definition uverbs_def_obj_device[];
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extern const struct uapi_definition uverbs_def_obj_dm[];
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extern const struct uapi_definition uverbs_def_obj_flow_action[];
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extern const struct uapi_definition uverbs_def_obj_intf[];
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extern const struct uapi_definition uverbs_def_obj_mr[];
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extern const struct uapi_definition uverbs_def_obj_qp[];
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extern const struct uapi_definition uverbs_def_obj_srq[];
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extern const struct uapi_definition uverbs_def_obj_wq[];
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extern const struct uapi_definition uverbs_def_write_intf[];
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static inline const struct uverbs_api_write_method *
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uapi_get_method(const struct uverbs_api *uapi, u32 command)
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{
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u32 cmd_idx = command & IB_USER_VERBS_CMD_COMMAND_MASK;
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if (command & ~(u32)(IB_USER_VERBS_CMD_FLAG_EXTENDED |
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IB_USER_VERBS_CMD_COMMAND_MASK))
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return ERR_PTR(-EINVAL);
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if (command & IB_USER_VERBS_CMD_FLAG_EXTENDED) {
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if (cmd_idx >= uapi->num_write_ex)
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return ERR_PTR(-EOPNOTSUPP);
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return uapi->write_ex_methods[cmd_idx];
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}
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if (cmd_idx >= uapi->num_write)
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return ERR_PTR(-EOPNOTSUPP);
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return uapi->write_methods[cmd_idx];
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}
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void uverbs_fill_udata(struct uverbs_attr_bundle *bundle,
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struct ib_udata *udata, unsigned int attr_in,
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unsigned int attr_out);
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#endif /* RDMA_CORE_H */
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