diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/infiniband/core/uverbs_std_types_srq.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_srq.c b/drivers/infiniband/core/uverbs_std_types_srq.c new file mode 100644 index 000000000..e5513f828 --- /dev/null +++ b/drivers/infiniband/core/uverbs_std_types_srq.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. + */ + +#include <rdma/uverbs_std_types.h> +#include "rdma_core.h" +#include "uverbs.h" + +static int uverbs_free_srq(struct ib_uobject *uobject, + enum rdma_remove_reason why, + struct uverbs_attr_bundle *attrs) +{ + struct ib_srq *srq = uobject->object; + struct ib_uevent_object *uevent = + container_of(uobject, struct ib_uevent_object, uobject); + enum ib_srq_type srq_type = srq->srq_type; + int ret; + + ret = ib_destroy_srq_user(srq, &attrs->driver_udata); + if (ret) + return ret; + + if (srq_type == IB_SRQT_XRC) { + struct ib_usrq_object *us = + container_of(uobject, struct ib_usrq_object, + uevent.uobject); + + atomic_dec(&us->uxrcd->refcnt); + } + + ib_uverbs_release_uevent(uevent); + return 0; +} + +static int UVERBS_HANDLER(UVERBS_METHOD_SRQ_CREATE)( + struct uverbs_attr_bundle *attrs) +{ + struct ib_usrq_object *obj = container_of( + uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_SRQ_HANDLE), + typeof(*obj), uevent.uobject); + struct ib_pd *pd = + uverbs_attr_get_obj(attrs, UVERBS_ATTR_CREATE_SRQ_PD_HANDLE); + struct ib_srq_init_attr attr = {}; + struct ib_uobject *xrcd_uobj; + struct ib_srq *srq; + u64 user_handle; + int ret; + + ret = uverbs_copy_from(&attr.attr.max_sge, attrs, + UVERBS_ATTR_CREATE_SRQ_MAX_SGE); + if (!ret) + ret = uverbs_copy_from(&attr.attr.max_wr, attrs, + UVERBS_ATTR_CREATE_SRQ_MAX_WR); + if (!ret) + ret = uverbs_copy_from(&attr.attr.srq_limit, attrs, + UVERBS_ATTR_CREATE_SRQ_LIMIT); + if (!ret) + ret = uverbs_copy_from(&user_handle, attrs, + UVERBS_ATTR_CREATE_SRQ_USER_HANDLE); + if (!ret) + ret = uverbs_get_const(&attr.srq_type, attrs, + UVERBS_ATTR_CREATE_SRQ_TYPE); + if (ret) + return ret; + + if (ib_srq_has_cq(attr.srq_type)) { + attr.ext.cq = uverbs_attr_get_obj(attrs, + UVERBS_ATTR_CREATE_SRQ_CQ_HANDLE); + if (IS_ERR(attr.ext.cq)) + return PTR_ERR(attr.ext.cq); + } + + switch (attr.srq_type) { + case IB_UVERBS_SRQT_XRC: + xrcd_uobj = uverbs_attr_get_uobject(attrs, + UVERBS_ATTR_CREATE_SRQ_XRCD_HANDLE); + if (IS_ERR(xrcd_uobj)) + return PTR_ERR(xrcd_uobj); + + attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object; + if (!attr.ext.xrc.xrcd) + return -EINVAL; + obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, + uobject); + atomic_inc(&obj->uxrcd->refcnt); + break; + case IB_UVERBS_SRQT_TM: + ret = uverbs_copy_from(&attr.ext.tag_matching.max_num_tags, + attrs, + UVERBS_ATTR_CREATE_SRQ_MAX_NUM_TAGS); + if (ret) + return ret; + break; + case IB_UVERBS_SRQT_BASIC: + break; + default: + return -EINVAL; + } + + obj->uevent.event_file = ib_uverbs_get_async_event(attrs, + UVERBS_ATTR_CREATE_SRQ_EVENT_FD); + INIT_LIST_HEAD(&obj->uevent.event_list); + attr.event_handler = ib_uverbs_srq_event_handler; + obj->uevent.uobject.user_handle = user_handle; + + srq = ib_create_srq_user(pd, &attr, obj, &attrs->driver_udata); + if (IS_ERR(srq)) { + ret = PTR_ERR(srq); + goto err; + } + + obj->uevent.uobject.object = srq; + uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_CREATE_SRQ_HANDLE); + + ret = uverbs_copy_to(attrs, UVERBS_ATTR_CREATE_SRQ_RESP_MAX_WR, + &attr.attr.max_wr, + sizeof(attr.attr.max_wr)); + if (ret) + return ret; + + ret = uverbs_copy_to(attrs, UVERBS_ATTR_CREATE_SRQ_RESP_MAX_SGE, + &attr.attr.max_sge, + sizeof(attr.attr.max_sge)); + if (ret) + return ret; + + if (attr.srq_type == IB_SRQT_XRC) { + ret = uverbs_copy_to(attrs, + UVERBS_ATTR_CREATE_SRQ_RESP_SRQ_NUM, + &srq->ext.xrc.srq_num, + sizeof(srq->ext.xrc.srq_num)); + if (ret) + return ret; + } + + return 0; +err: + if (obj->uevent.event_file) + uverbs_uobject_put(&obj->uevent.event_file->uobj); + if (attr.srq_type == IB_SRQT_XRC) + atomic_dec(&obj->uxrcd->refcnt); + return ret; +}; + +DECLARE_UVERBS_NAMED_METHOD( + UVERBS_METHOD_SRQ_CREATE, + UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_SRQ_HANDLE, + UVERBS_OBJECT_SRQ, + UVERBS_ACCESS_NEW, + UA_MANDATORY), + UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_SRQ_PD_HANDLE, + UVERBS_OBJECT_PD, + UVERBS_ACCESS_READ, + UA_MANDATORY), + UVERBS_ATTR_CONST_IN(UVERBS_ATTR_CREATE_SRQ_TYPE, + enum ib_uverbs_srq_type, + UA_MANDATORY), + UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_SRQ_USER_HANDLE, + UVERBS_ATTR_TYPE(u64), + UA_MANDATORY), + UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_SRQ_MAX_WR, + UVERBS_ATTR_TYPE(u32), + UA_MANDATORY), + UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_SRQ_MAX_SGE, + UVERBS_ATTR_TYPE(u32), + UA_MANDATORY), + UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_SRQ_LIMIT, + UVERBS_ATTR_TYPE(u32), + UA_MANDATORY), + UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_SRQ_XRCD_HANDLE, + UVERBS_OBJECT_XRCD, + UVERBS_ACCESS_READ, + UA_OPTIONAL), + UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_SRQ_CQ_HANDLE, + UVERBS_OBJECT_CQ, + UVERBS_ACCESS_READ, + UA_OPTIONAL), + UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_SRQ_MAX_NUM_TAGS, + UVERBS_ATTR_TYPE(u32), + UA_OPTIONAL), + UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_SRQ_EVENT_FD, + UVERBS_OBJECT_ASYNC_EVENT, + UVERBS_ACCESS_READ, + UA_OPTIONAL), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_SRQ_RESP_MAX_WR, + UVERBS_ATTR_TYPE(u32), + UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_SRQ_RESP_MAX_SGE, + UVERBS_ATTR_TYPE(u32), + UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_SRQ_RESP_SRQ_NUM, + UVERBS_ATTR_TYPE(u32), + UA_OPTIONAL), + UVERBS_ATTR_UHW()); + +static int UVERBS_HANDLER(UVERBS_METHOD_SRQ_DESTROY)( + struct uverbs_attr_bundle *attrs) +{ + struct ib_uobject *uobj = + uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_SRQ_HANDLE); + struct ib_usrq_object *obj = + container_of(uobj, struct ib_usrq_object, uevent.uobject); + struct ib_uverbs_destroy_srq_resp resp = { + .events_reported = obj->uevent.events_reported + }; + + return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_SRQ_RESP, &resp, + sizeof(resp)); +} + +DECLARE_UVERBS_NAMED_METHOD( + UVERBS_METHOD_SRQ_DESTROY, + UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_SRQ_HANDLE, + UVERBS_OBJECT_SRQ, + UVERBS_ACCESS_DESTROY, + UA_MANDATORY), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_SRQ_RESP, + UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_srq_resp), + UA_MANDATORY)); + +DECLARE_UVERBS_NAMED_OBJECT( + UVERBS_OBJECT_SRQ, + UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object), + uverbs_free_srq), + &UVERBS_METHOD(UVERBS_METHOD_SRQ_CREATE), + &UVERBS_METHOD(UVERBS_METHOD_SRQ_DESTROY) +); + +const struct uapi_definition uverbs_def_obj_srq[] = { + UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_SRQ, + UAPI_DEF_OBJ_NEEDS_FN(destroy_srq)), + {} +}; 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