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author | Ariel Levkovich <lariel@mellanox.com> | 2018-04-05 18:53:24 +0300 |
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committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-04-05 11:16:39 -0600 |
commit | bee76d7ab5d270919e80e4764df7cd7e4f06ed24 (patch) | |
tree | d8ba6c8ddbc8aa781427f4c0081e8d05b47fb2d9 /drivers/infiniband/core/uverbs_std_types_dm.c | |
parent | 1d8eeb9f6a6e0d8ac43a54fd95126044bf8d6695 (diff) | |
download | linux-stable-bee76d7ab5d270919e80e4764df7cd7e4f06ed24.tar.gz linux-stable-bee76d7ab5d270919e80e4764df7cd7e4f06ed24.tar.bz2 linux-stable-bee76d7ab5d270919e80e4764df7cd7e4f06ed24.zip |
IB/uverbs: Add alloc/free dm uverbs ioctl support
This change adds uverbs support for allocation/freeing
of device memory commands.
A new uverbs object is defined of type idr to represent
and track the new resource type allocation per context.
The API requires provider driver to implement 2 new ib_device
callbacks - one for allocation and one for deallocation which
return and accept (respectively) the ib_dm object which represents
the allocated memory on the device.
The support is added via the ioctl command infrastructure
only.
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_std_types_dm.c')
-rw-r--r-- | drivers/infiniband/core/uverbs_std_types_dm.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_dm.c b/drivers/infiniband/core/uverbs_std_types_dm.c new file mode 100644 index 000000000000..8b681575b615 --- /dev/null +++ b/drivers/infiniband/core/uverbs_std_types_dm.c @@ -0,0 +1,108 @@ +/* + * 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_dm(struct ib_uobject *uobject, + enum rdma_remove_reason why) +{ + struct ib_dm *dm = uobject->object; + + if (why == RDMA_REMOVE_DESTROY && atomic_read(&dm->usecnt)) + return -EBUSY; + + return dm->device->dealloc_dm(dm); +} + +static int UVERBS_HANDLER(UVERBS_METHOD_DM_ALLOC)(struct ib_device *ib_dev, + struct ib_uverbs_file *file, + struct uverbs_attr_bundle *attrs) +{ + struct ib_ucontext *ucontext = file->ucontext; + struct ib_dm_alloc_attr attr = {}; + struct ib_uobject *uobj; + struct ib_dm *dm; + int ret; + + if (!ib_dev->alloc_dm) + return -EOPNOTSUPP; + + ret = uverbs_copy_from(&attr.length, attrs, + UVERBS_ATTR_ALLOC_DM_LENGTH); + if (ret) + return ret; + + ret = uverbs_copy_from(&attr.alignment, attrs, + UVERBS_ATTR_ALLOC_DM_ALIGNMENT); + if (ret) + return ret; + + uobj = uverbs_attr_get(attrs, UVERBS_ATTR_ALLOC_DM_HANDLE)->obj_attr.uobject; + + dm = ib_dev->alloc_dm(ib_dev, ucontext, &attr, attrs); + if (IS_ERR(dm)) + return PTR_ERR(dm); + + dm->device = ib_dev; + dm->length = attr.length; + dm->uobject = uobj; + atomic_set(&dm->usecnt, 0); + + uobj->object = dm; + + return 0; +} + +static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_DM_ALLOC, + &UVERBS_ATTR_IDR(UVERBS_ATTR_ALLOC_DM_HANDLE, UVERBS_OBJECT_DM, + UVERBS_ACCESS_NEW, + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ALLOC_DM_LENGTH, + UVERBS_ATTR_TYPE(u64), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ALLOC_DM_ALIGNMENT, + UVERBS_ATTR_TYPE(u32), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); + +static DECLARE_UVERBS_NAMED_METHOD_WITH_HANDLER(UVERBS_METHOD_DM_FREE, + uverbs_destroy_def_handler, + &UVERBS_ATTR_IDR(UVERBS_ATTR_FREE_DM_HANDLE, + UVERBS_OBJECT_DM, + UVERBS_ACCESS_DESTROY, + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); + +DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_DM, + /* 1 is used in order to free the DM after MRs */ + &UVERBS_TYPE_ALLOC_IDR(1, uverbs_free_dm), + &UVERBS_METHOD(UVERBS_METHOD_DM_ALLOC), + &UVERBS_METHOD(UVERBS_METHOD_DM_FREE)); |