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IB/hfi1: Move receive work queue struct into uapi directory

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The rvt_rwqe and rvt_rwq struct elements are shared between rdmavt and the
providers but are not in uapi directory.  As per the comment in
https://marc.info/?l=linux-rdma&m=152296522708522&w=2, The hfi1 driver and
the rdma core driver are not using shared structures in the uapi
directory.

Move rvt_rwqe and rvt_rwq struct into rvt-abi.h header in uapi directory.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Kamenee Arumugam <kamenee.arumugam@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Kamenee Arumugam
2019-06-28 14:04:24 -04:00
committed by Jason Gunthorpe
parent 239b0e52d8
commit dabac6e460
6 changed files with 212 additions and 92 deletions
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29
include/uapi/rdma/rvt-abi.h
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@@ -10,6 +10,7 @@
#include <linux/types.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_verbs.h>
#ifndef RDMA_ATOMIC_UAPI
#define RDMA_ATOMIC_UAPI(_type, _name) struct{ _type val; } _name
#endif
@@ -29,4 +30,32 @@ struct rvt_cq_wc {
struct ib_uverbs_wc uqueue[];
};
/*
* Receive work request queue entry.
* The size of the sg_list is determined when the QP (or SRQ) is created
* and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
*/
struct rvt_rwqe {
__u64 wr_id;
__u8 num_sge;
__u8 padding[7];
struct ib_sge sg_list[];
};
/*
* This structure is used to contain the head pointer, tail pointer,
* and receive work queue entries as a single memory allocation so
* it can be mmap'ed into user space.
* Note that the wq array elements are variable size so you can't
* just index into the array to get the N'th element;
* use get_rwqe_ptr() for user space and rvt_get_rwqe_ptr()
* for kernel space.
*/
struct rvt_rwq {
/* new work requests posted to the head */
RDMA_ATOMIC_UAPI(__u32, head);
/* receives pull requests from here. */
RDMA_ATOMIC_UAPI(__u32, tail);
struct rvt_rwqe wq[];
};
#endif /* RVT_ABI_USER_H */