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RDMA/core: Introduce IB_MR_TYPE_INTEGRITY and ib_alloc_mr_integrity API

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This is a preparation for signature verbs API re-design. In the new
design a single MR with IB_MR_TYPE_INTEGRITY type will be used to perform
the needed mapping for data integrity operations.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Israel Rukshin
2019-06-11 18:52:39 +03:00
committed by Jason Gunthorpe
parent a0bc099abf
commit 26bc7eaee9
3 changed files with 57 additions and 0 deletions
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1
drivers/infiniband/core/device.c
View File

@@ -2437,6 +2437,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
SET_DEVICE_OP(dev_ops, alloc_fmr);
SET_DEVICE_OP(dev_ops, alloc_hw_stats);
SET_DEVICE_OP(dev_ops, alloc_mr);
SET_DEVICE_OP(dev_ops, alloc_mr_integrity);
SET_DEVICE_OP(dev_ops, alloc_mw);
SET_DEVICE_OP(dev_ops, alloc_pd);
SET_DEVICE_OP(dev_ops, alloc_rdma_netdev);

46
drivers/infiniband/core/verbs.c
View File

@@ -2011,6 +2011,9 @@ struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
if (!pd->device->ops.alloc_mr)
return ERR_PTR(-EOPNOTSUPP);
if (WARN_ON_ONCE(mr_type == IB_MR_TYPE_INTEGRITY))
return ERR_PTR(-EINVAL);
mr = pd->device->ops.alloc_mr(pd, mr_type, max_num_sg, udata);
if (!IS_ERR(mr)) {
mr->device = pd->device;
@@ -2028,6 +2031,49 @@ struct ib_mr *ib_alloc_mr_user(struct ib_pd *pd, enum ib_mr_type mr_type,
}
EXPORT_SYMBOL(ib_alloc_mr_user);
/**
* ib_alloc_mr_integrity() - Allocates an integrity memory region
* @pd: protection domain associated with the region
* @max_num_data_sg: maximum data sg entries available for registration
* @max_num_meta_sg: maximum metadata sg entries available for
* registration
*
* Notes:
* Memory registration page/sg lists must not exceed max_num_sg,
* also the integrity page/sg lists must not exceed max_num_meta_sg.
*
*/
struct ib_mr *ib_alloc_mr_integrity(struct ib_pd *pd,
u32 max_num_data_sg,
u32 max_num_meta_sg)
{
struct ib_mr *mr;
if (!pd->device->ops.alloc_mr_integrity)
return ERR_PTR(-EOPNOTSUPP);
if (!max_num_meta_sg)
return ERR_PTR(-EINVAL);
mr = pd->device->ops.alloc_mr_integrity(pd, max_num_data_sg,
max_num_meta_sg);
if (IS_ERR(mr))
return mr;
mr->device = pd->device;
mr->pd = pd;
mr->dm = NULL;
mr->uobject = NULL;
atomic_inc(&pd->usecnt);
mr->need_inval = false;
mr->res.type = RDMA_RESTRACK_MR;
rdma_restrack_kadd(&mr->res);
mr->type = IB_MR_TYPE_INTEGRITY;
return mr;
}
EXPORT_SYMBOL(ib_alloc_mr_integrity);
/* "Fast" memory regions */
struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,