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RDMA/rxe: Implement rereg_user_mr

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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: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson
2023-05-30 17:13:35 -05:00
committed by Jason Gunthorpe
parent 86a3fb55bc
commit 544c7f62cf
2 changed files with 40 additions and 0 deletions
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35
drivers/infiniband/sw/rxe/rxe_verbs.c
View File

@@ -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),

5
drivers/infiniband/sw/rxe/rxe_verbs.h
View File

@@ -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;