diff options
Diffstat (limited to 'drivers/infiniband/core/uverbs_std_types_mr.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types_mr.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_mr.c b/drivers/infiniband/core/uverbs_std_types_mr.c new file mode 100644 index 000000000000..68f7cadf088f --- /dev/null +++ b/drivers/infiniband/core/uverbs_std_types_mr.c @@ -0,0 +1,147 @@ +/* + * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "uverbs.h" +#include <rdma/uverbs_std_types.h> + +static int uverbs_free_mr(struct ib_uobject *uobject, + enum rdma_remove_reason why) +{ + return ib_dereg_mr((struct ib_mr *)uobject->object); +} + +static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(struct ib_device *ib_dev, + struct ib_uverbs_file *file, + struct uverbs_attr_bundle *attrs) +{ + struct ib_dm_mr_attr attr = {}; + struct ib_uobject *uobj; + struct ib_dm *dm; + struct ib_pd *pd; + struct ib_mr *mr; + int ret; + + if (!ib_dev->reg_dm_mr) + return -EOPNOTSUPP; + + ret = uverbs_copy_from(&attr.offset, attrs, UVERBS_ATTR_REG_DM_MR_OFFSET); + if (ret) + return ret; + + ret = uverbs_copy_from(&attr.length, attrs, + UVERBS_ATTR_REG_DM_MR_LENGTH); + if (ret) + return ret; + + ret = uverbs_copy_from(&attr.access_flags, attrs, + UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS); + if (ret) + return ret; + + if (!(attr.access_flags & IB_ZERO_BASED)) + return -EINVAL; + + ret = ib_check_mr_access(attr.access_flags); + if (ret) + return ret; + + pd = uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_PD_HANDLE); + + dm = uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_DM_HANDLE); + + uobj = uverbs_attr_get(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE)->obj_attr.uobject; + + if (attr.offset > dm->length || attr.length > dm->length || + attr.length > dm->length - attr.offset) + return -EINVAL; + + mr = pd->device->reg_dm_mr(pd, dm, &attr, attrs); + if (IS_ERR(mr)) + return PTR_ERR(mr); + + mr->device = pd->device; + mr->pd = pd; + mr->dm = dm; + mr->uobject = uobj; + atomic_inc(&pd->usecnt); + atomic_inc(&dm->usecnt); + + uobj->object = mr; + + ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_LKEY, &mr->lkey, + sizeof(mr->lkey)); + if (ret) + goto err_dereg; + + ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_RKEY, + &mr->rkey, sizeof(mr->rkey)); + if (ret) + goto err_dereg; + + return 0; + +err_dereg: + ib_dereg_mr(mr); + + return ret; +} + +static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_DM_MR_REG, + &UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_HANDLE, UVERBS_OBJECT_MR, + UVERBS_ACCESS_NEW, + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_OFFSET, + UVERBS_ATTR_TYPE(u64), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_LENGTH, + UVERBS_ATTR_TYPE(u64), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_PD_HANDLE, UVERBS_OBJECT_PD, + UVERBS_ACCESS_READ, + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS, + UVERBS_ATTR_TYPE(u32), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_DM_HANDLE, UVERBS_OBJECT_DM, + UVERBS_ACCESS_READ, + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_LKEY, + UVERBS_ATTR_TYPE(u32), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_RKEY, + UVERBS_ATTR_TYPE(u32), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); + +DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MR, + /* 1 is used in order to free the MR after all the MWs */ + &UVERBS_TYPE_ALLOC_IDR(1, uverbs_free_mr), + &UVERBS_METHOD(UVERBS_METHOD_DM_MR_REG)); |