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IB/uverbs: Add device memory registration ioctl support

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Adding new ioctl method for the MR object - REG_DM_MR.

This command can be used by users to register an allocated
device memory buffer as an MR and receive lkey and rkey
to be used within work requests.

It is added as a new method under the MR object and using a new
ib_device callback - reg_dm_mr.
The command creates a standard ib_mr object which represents the
registered memory.

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Ariel Levkovich
2018-04-05 18:53:25 +03:00
committed by Jason Gunthorpe
parent bee76d7ab5
commit be934cca9e
7 changed files with 193 additions and 12 deletions
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11
include/rdma/ib_verbs.h
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@@ -321,6 +321,12 @@ struct ib_cq_caps {
u16 max_cq_moderation_period;
};
struct ib_dm_mr_attr {
u64 length;
u64 offset;
u32 access_flags;
};
struct ib_dm_alloc_attr {
u64 length;
u32 alignment;
@@ -1797,6 +1803,8 @@ struct ib_mr {
struct list_head qp_entry; /* FR */
};
struct ib_dm *dm;
/*
* Implementation details of the RDMA core, don't use in drivers:
*/
@@ -2444,6 +2452,9 @@ struct ib_device {
struct ib_dm_alloc_attr *attr,
struct uverbs_attr_bundle *attrs);
int (*dealloc_dm)(struct ib_dm *dm);
struct ib_mr * (*reg_dm_mr)(struct ib_pd *pd, struct ib_dm *dm,
struct ib_dm_mr_attr *attr,
struct uverbs_attr_bundle *attrs);
/**
* rdma netdev operation
*