[PATCH for-next 08/12] RDMA/bnxt_re: Fix FRMR issue with single page MR allocation
From: Selvin Xavier <selvin.xavier@broadcom.com>
Date: 2021-09-12 18:15:46
Subsystem:
broadcom netxtreme-e roce driver, infiniband subsystem, the rest · Maintainers:
Selvin Xavier, Kalesh AP, Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
When the FRMR is allocated with single page, driver is attempting to create a level 0 HWQ and not allocating any page because the nopte field is set. This causes the crash during post_send as the pbl is not populated. To avoid this crash, check for the nopte bit during HWQ creation with single page and create a level 1 page table and populate the pbl address correctly. Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com> --- drivers/infiniband/hw/bnxt_re/qplib_res.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c
index 44282a8..bf49363 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_res.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c@@ -228,15 +228,16 @@ int bnxt_qplib_alloc_init_hwq(struct bnxt_qplib_hwq *hwq, npages++; } - if (npages == MAX_PBL_LVL_0_PGS) { + if (npages == MAX_PBL_LVL_0_PGS && !hwq_attr->sginfo->nopte) { /* This request is Level 0, map PTE */ rc = __alloc_pbl(res, &hwq->pbl[PBL_LVL_0], hwq_attr->sginfo); if (rc) goto fail; hwq->level = PBL_LVL_0; + goto done; } - if (npages > MAX_PBL_LVL_0_PGS) { + if (npages >= MAX_PBL_LVL_0_PGS) { if (npages > MAX_PBL_LVL_1_PGS) { u32 flag = (hwq_attr->type == HWQ_TYPE_L2_CMPL) ? 0 : PTU_PTE_VALID;
--
2.5.5