Commit 544c7f62 authored by Bob Pearson's avatar Bob Pearson Committed by Jason Gunthorpe
Browse files

RDMA/rxe: Implement rereg_user_mr 

Implement the two easy cases of ib_rereg_user_mr.

Link: https://lore.kernel.org/r/20230530221334.89432-7-rpearsonhpe@gmail.com


Signed-off-by: default avatarBob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 86a3fb55

drivers/infiniband/sw/rxe/rxe_verbs.c

+35 −0
Original line number Diff line number Diff line
@@ -1299,6 +1299,40 @@ static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd, u64 start, 
	return ERR_PTR(err);

}



static struct ib_mr *rxe_rereg_user_mr(struct ib_mr *ibmr, int flags,

				       u64 start, u64 length, u64 iova,

				       int access, struct ib_pd *ibpd,

				       struct ib_udata *udata)

{

	struct rxe_mr *mr = to_rmr(ibmr);

	struct rxe_pd *old_pd = to_rpd(ibmr->pd);

	struct rxe_pd *pd = to_rpd(ibpd);



	/* for now only support the two easy cases:

	 * rereg_pd and rereg_access

	 */

	if (flags & ~RXE_MR_REREG_SUPPORTED) {

		rxe_err_mr(mr, "flags = %#x not supported", flags);

		return ERR_PTR(-EOPNOTSUPP);

	}



	if (flags & IB_MR_REREG_PD) {

		rxe_put(old_pd);

		rxe_get(pd);

		mr->ibmr.pd = ibpd;

	}



	if (flags & IB_MR_REREG_ACCESS) {

		if (access & ~RXE_ACCESS_SUPPORTED_MR) {

			rxe_err_mr(mr, "access = %#x not supported", access);

			return ERR_PTR(-EOPNOTSUPP);

		}

		mr->access = access;

	}



	return NULL;

}



static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,

				  u32 max_num_sg)

{
@@ -1451,6 +1485,7 @@ static const struct ib_device_ops rxe_dev_ops = { 
	.query_srq = rxe_query_srq,

	.reg_user_mr = rxe_reg_user_mr,

	.req_notify_cq = rxe_req_notify_cq,

	.rereg_user_mr = rxe_rereg_user_mr,

	.resize_cq = rxe_resize_cq,



	INIT_RDMA_OBJ_SIZE(ib_ah, rxe_ah, ibah),

drivers/infiniband/sw/rxe/rxe_verbs.h

+5 −0
Original line number Diff line number Diff line
@@ -284,6 +284,11 @@ enum rxe_mr_lookup_type { 
	RXE_LOOKUP_REMOTE,

};



enum rxe_rereg {

	RXE_MR_REREG_SUPPORTED	= IB_MR_REREG_PD

				| IB_MR_REREG_ACCESS,

};



static inline int rkey_is_mw(u32 rkey)

{

	u32 index = rkey >> 8;