On Tue, Jul 9, 2024 at 8:31 PM Jack Wang <jinpu.wang@xxxxxxxxx> wrote:
>
> When map a device between servers with MLX and BCM RoCE nics, RTRS
> server complain about unknown imm type, and can't map the device,
>
> After more debug, it seems bnxt_re wrongly handle the
> imm_data, this patch fixed the compat issue with MLX for us.
>
> In offlist discussion, Selvin confirm HW is working in little endian
> format and all data needs to be converted to LE while providing.
>
> This patch fix the endianness for imm_data
>
> Fixes: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
> Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxx>
Hi Jinpu,
Thank you for this patch and debugging with Broadcom devices. Couple
of comments. Also, maybe you can clean up the commit message by moving
the reference of our discussion to the cover letter.
Thanks,
Selvin
> ---
> drivers/infiniband/hw/bnxt_re/ib_verbs.c | 8 ++++----
> drivers/infiniband/hw/bnxt_re/qplib_fp.h | 6 +++---
> 2 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
> index e453ca701e87..c5080028247e 100644
> --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
> +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
> @@ -2479,7 +2479,7 @@ static int bnxt_re_build_send_wqe(struct bnxt_re_qp *qp,
> break;
> case IB_WR_SEND_WITH_IMM:
> wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM;
> - wqe->send.imm_data = wr->ex.imm_data;
> + wqe->send.imm_data = cpu_to_le32(be32_to_cpu(wr->ex.imm_data));
If you see bnxt_re/qplib_fp.c, we have the following code. This
ensures that le32
is passed down. So in your patch, we just need to do be32_to_cpu of
the immediate data.
sqe->inv_key_or_imm_data = cpu_to_le32(wqe->send.inv_key);
> break;
> case IB_WR_SEND_WITH_INV:
> wqe->type = BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV;
> @@ -2509,7 +2509,7 @@ static int bnxt_re_build_rdma_wqe(const struct ib_send_wr *wr,
> break;
> case IB_WR_RDMA_WRITE_WITH_IMM:
> wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM;
> - wqe->rdma.imm_data = wr->ex.imm_data;
> + wqe->rdma.imm_data = cpu_to_le32(be32_to_cpu(wr->ex.imm_data));
Same comment as above
> break;
> case IB_WR_RDMA_READ:
> wqe->type = BNXT_QPLIB_SWQE_TYPE_RDMA_READ;
> @@ -3582,7 +3582,7 @@ static void bnxt_re_process_res_shadow_qp_wc(struct bnxt_re_qp *gsi_sqp,
> wc->byte_len = orig_cqe->length;
> wc->qp = &gsi_qp->ib_qp;
>
> - wc->ex.imm_data = orig_cqe->immdata;
> + wc->ex.imm_data = cpu_to_be32(le32_to_cpu(orig_cqe->immdata));
> wc->src_qp = orig_cqe->src_qp;
> memcpy(wc->smac, orig_cqe->smac, ETH_ALEN);
> if (bnxt_re_is_vlan_pkt(orig_cqe, &vlan_id, &sl)) {
> @@ -3727,7 +3727,7 @@ int bnxt_re_poll_cq(struct ib_cq *ib_cq, int num_entries, struct ib_wc *wc)
> (unsigned long)(cqe->qp_handle),
> struct bnxt_re_qp, qplib_qp);
> wc->qp = &qp->ib_qp;
> - wc->ex.imm_data = cqe->immdata;
> + wc->ex.imm_data = cpu_to_be32(le32_to_cpu(cqe->immdata));
> wc->src_qp = cqe->src_qp;
> memcpy(wc->smac, cqe->smac, ETH_ALEN);
> wc->port_num = 1;
> diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.h b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
> index 4aaac84c1b1b..1fcaba0f680b 100644
> --- a/drivers/infiniband/hw/bnxt_re/qplib_fp.h
> +++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.h
> @@ -164,7 +164,7 @@ struct bnxt_qplib_swqe {
> /* Send, with imm, inval key */
> struct {
> union {
> - __be32 imm_data;
> + __le32 imm_data;
Once you implement according to my comment above, this can be a u32
> u32 inv_key;
> };
> u32 q_key;
> @@ -182,7 +182,7 @@ struct bnxt_qplib_swqe {
> /* RDMA write, with imm, read */
> struct {
> union {
> - __be32 imm_data;
> + __le32 imm_data;
> u32 inv_key;
> };
> u64 remote_va;
> @@ -389,7 +389,7 @@ struct bnxt_qplib_cqe {
> u16 cfa_meta;
> u64 wr_id;
> union {
> - __be32 immdata;
> + __le32 immdata;
> u32 invrkey;
> };
> u64 qp_handle;
> --
> 2.34.1
>
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