From: Pramod Kumar Date: Fri, 21 Nov 2014 15:36:35 +0000 (-0600) Subject: RDMA/cxgb4: Configure 0B MRs to match HW implementation X-Git-Tag: v3.19-rc1~30^2^2~4 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=123bc2a27aa4cd18a5fe4f5d66254e4863870362;p=karo-tx-linux.git 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 . Signed-off-by: Pramod Kumar Signed-off-by: Steve Wise Signed-off-by: Hariprasad Shenai Signed-off-by: Roland Dreier --- 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;