// 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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