diff options
| author | Pramod Kumar <pramod@chelsio.com> | 2014-11-21 09:36:35 -0600 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-12-15 18:10:46 -0800 |
| commit | 123bc2a27aa4cd18a5fe4f5d66254e4863870362 (patch) | |
| tree | e8660a877ac4dc5e564596a6aef98c91a0419af2 /drivers/infiniband | |
| parent | 63a71ba6178a1989dcea1c5f595b6c6a3d48d6d9 (diff) | |
RDMA/cxgb4: Configure 0B MRs to match HW implementation
0B MRs need some tweaks to work correctly with HW. When writing the
TPTE, if the MR length is zero we now:
1) turn off all permissions
2) set the length to -1
While functionality/capabilities of the MR are the same with these
changes, it resolves a dapltest 0B RDMA Read test failure. Based on
original work by Steve Wise <swise@opengridcomputing.com>.
Signed-off-by: Pramod Kumar <pramod@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/mem.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c index 0744455cd88b..6bf14d803e5a 100644 --- a/drivers/infiniband/hw/cxgb4/mem.c +++ b/drivers/infiniband/hw/cxgb4/mem.c @@ -369,9 +369,11 @@ static int register_mem(struct c4iw_dev *rhp, struct c4iw_pd *php, int ret; ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, mhp->attr.pdid, - FW_RI_STAG_NSMR, mhp->attr.perms, + FW_RI_STAG_NSMR, mhp->attr.len ? + mhp->attr.perms : 0, mhp->attr.mw_bind_enable, mhp->attr.zbva, - mhp->attr.va_fbo, mhp->attr.len, shift - 12, + mhp->attr.va_fbo, mhp->attr.len ? + mhp->attr.len : -1, shift - 12, mhp->attr.pbl_size, mhp->attr.pbl_addr); if (ret) return ret; |