RDMA/bnxt_re: Avoid creating fence MR for newer adapters

Limit the usage of fence MR to adapters older than Gen P5 products.

Fixes: 1801d87b3598 ("RDMA/bnxt_re: Support new 5760X P7 devices")
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Bhargava Chenna Marreddy <bhargava.marreddy@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://lore.kernel.org/r/1705985677-15551-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 824349659d69dc8e9ea9c1b5254d469628a5f933..e1ea49263145eb2ef3b7c402c39af2b0665dc8e1 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -401,6 +401,10 @@ static void bnxt_re_create_fence_wqe(struct bnxt_re_pd *pd)
        struct bnxt_re_fence_data *fence = &pd->fence;
        struct ib_mr *ib_mr = &fence->mr->ib_mr;
        struct bnxt_qplib_swqe *wqe = &fence->bind_wqe;
+       struct bnxt_re_dev *rdev = pd->rdev;
+
+       if (bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
+               return;
 
        memset(wqe, 0, sizeof(*wqe));
        wqe->type = BNXT_QPLIB_SWQE_TYPE_BIND_MW;
@@ -455,6 +459,9 @@ static void bnxt_re_destroy_fence_mr(struct bnxt_re_pd *pd)
        struct device *dev = &rdev->en_dev->pdev->dev;
        struct bnxt_re_mr *mr = fence->mr;
 
+       if (bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
+               return;
+
        if (fence->mw) {
                bnxt_re_dealloc_mw(fence->mw);
                fence->mw = NULL;
@@ -486,6 +493,9 @@ static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd)
        struct ib_mw *mw;
        int rc;
 
+       if (bnxt_qplib_is_chip_gen_p5_p7(rdev->chip_ctx))
+               return 0;
+
        dma_addr = dma_map_single(dev, fence->va, BNXT_RE_FENCE_BYTES,
                                  DMA_BIDIRECTIONAL);
        rc = dma_mapping_error(dev, dma_addr);