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author | Brian Welty <brian.welty@intel.com> | 2017-02-08 05:27:37 -0800 |
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committer | Doug Ledford <dledford@redhat.com> | 2017-02-19 09:18:41 -0500 |
commit | 1198fcea8a7810d06069a85256d1ef9ec97d434b (patch) | |
tree | 42e90b86c9360604916c10dd4313693b5998c177 /include/rdma/rdmavt_mr.h | |
parent | 0128fceaf934dbfca4537d4eb8c3a5f7e84562c8 (diff) | |
download | linux-stable-1198fcea8a7810d06069a85256d1ef9ec97d434b.tar.gz linux-stable-1198fcea8a7810d06069a85256d1ef9ec97d434b.tar.bz2 linux-stable-1198fcea8a7810d06069a85256d1ef9ec97d434b.zip |
IB/hfi1, rdmavt: Move SGE state helper routines into rdmavt
To improve code reuse, add small SGE state helper routines to rdmavt_mr.h.
Leverage these in hfi1, including refactoring of hfi1_copy_sge.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@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>
Diffstat (limited to 'include/rdma/rdmavt_mr.h')
-rw-r--r-- | include/rdma/rdmavt_mr.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/include/rdma/rdmavt_mr.h b/include/rdma/rdmavt_mr.h index 05698d8d9c6f..f418bd5571a5 100644 --- a/include/rdma/rdmavt_mr.h +++ b/include/rdma/rdmavt_mr.h @@ -141,4 +141,54 @@ static inline void rvt_put_ss(struct rvt_sge_state *ss) } } +static inline u32 rvt_get_sge_length(struct rvt_sge *sge, u32 length) +{ + u32 len = sge->length; + + if (len > length) + len = length; + if (len > sge->sge_length) + len = sge->sge_length; + + return len; +} + +static inline void rvt_update_sge(struct rvt_sge_state *ss, u32 length, + bool release) +{ + struct rvt_sge *sge = &ss->sge; + + sge->vaddr += length; + sge->length -= length; + sge->sge_length -= length; + if (sge->sge_length == 0) { + if (release) + rvt_put_mr(sge->mr); + if (--ss->num_sge) + *sge = *ss->sg_list++; + } else if (sge->length == 0 && sge->mr->lkey) { + if (++sge->n >= RVT_SEGSZ) { + if (++sge->m >= sge->mr->mapsz) + return; + sge->n = 0; + } + sge->vaddr = sge->mr->map[sge->m]->segs[sge->n].vaddr; + sge->length = sge->mr->map[sge->m]->segs[sge->n].length; + } +} + +static inline void rvt_skip_sge(struct rvt_sge_state *ss, u32 length, + bool release) +{ + struct rvt_sge *sge = &ss->sge; + + while (length) { + u32 len = rvt_get_sge_length(sge, length); + + WARN_ON_ONCE(len == 0); + rvt_update_sge(ss, len, release); + length -= len; + } +} + #endif /* DEF_RDMAVT_INCMRH */ |