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IB/hfi1, qib, rdmavt: Move AETH credit functions into rdmavt

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Add rvt_compute_aeth() and rvt_get_credit() as shared functions in
rdmavt, moved from hfi1/qib logic.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Brian Welty
2017-02-08 05:27:07 -08:00
committed by Doug Ledford
parent beb5a04267
commit 696513e8cf
13 changed files with 265 additions and 352 deletions
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31
include/rdma/rdmavt_qp.h
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@@ -582,6 +582,37 @@ static inline void rvt_qp_swqe_complete(
}
}
#define RVT_AETH_CREDIT_SHIFT 24
#define RVT_AETH_CREDIT_MASK 0x1F
#define RVT_AETH_NAK_SHIFT 29
#define RVT_MSN_MASK 0xFFFFFF
/*
* Compare the lower 24 bits of the msn values.
* Returns an integer <, ==, or > than zero.
*/
static inline int rvt_cmp_msn(u32 a, u32 b)
{
return (((int)a) - ((int)b)) << 8;
}
/**
* rvt_compute_aeth - compute the AETH (syndrome + MSN)
* @qp: the queue pair to compute the AETH for
*
* Returns the AETH.
*/
__be32 rvt_compute_aeth(struct rvt_qp *qp);
/**
* rvt_get_credit - flush the send work queue of a QP
* @qp: the qp who's send work queue to flush
* @aeth: the Acknowledge Extended Transport Header
*
* The QP s_lock should be held.
*/
void rvt_get_credit(struct rvt_qp *qp, u32 aeth);
/**
* @qp - the qp pair
* @len - the length