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RDMA/bnxt_re: Support doorbells for app allocated QPs

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App allocated QPs can use a separate doorbell for each QP.
This doorbell region can be passed through a new driver specific
DBR_HANDLE attribute, during QP creation. When this attribute
is set, associate the QP with the given doorbell region.

While the QP holds a reference to the dbr, the dbr itself
cannot be destroyed and is rejected with EBUSY error.

Link: https://patch.msgid.link/r/20260519150041.7251-9-sriharsha.basavapatna@broadcom.com
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Sriharsha Basavapatna
2026-05-19 20:30:40 +05:30
committed by Jason Gunthorpe
parent 54c01d98f4
commit 7e812673a9
4 changed files with 59 additions and 5 deletions
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4
include/uapi/rdma/bnxt_re-abi.h
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@@ -138,6 +138,10 @@ struct bnxt_re_qp_req {
__u32 sq_npsn;
};
enum bnxt_re_create_qp_attrs {
BNXT_RE_CREATE_QP_ATTR_DBR_HANDLE = UVERBS_ID_DRIVER_NS_WITH_UHW,
};
struct bnxt_re_qp_resp {
__u32 qpid;
__u32 rsvd;