On Thu, Jun 03, 2021 at 04:00:55PM +0530, Devesh Sharma wrote:
> Enabling Atomic operations for Gen P5 devices if the underlying
> platform supports global atomic ops.
>
> Signed-off-by: Devesh Sharma <devesh.sharma@xxxxxxxxxxxx>
> ---
> drivers/infiniband/hw/bnxt_re/ib_verbs.c | 4 ++++
> drivers/infiniband/hw/bnxt_re/main.c | 3 +++
> drivers/infiniband/hw/bnxt_re/qplib_res.c | 17 +++++++++++++++++
> drivers/infiniband/hw/bnxt_re/qplib_res.h | 1 +
> drivers/infiniband/hw/bnxt_re/qplib_sp.c | 13 ++++++++++++-
> drivers/infiniband/hw/bnxt_re/qplib_sp.h | 2 --
> 6 files changed, 37 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
> index 537471ffaa79..a113d8d9e9ed 100644
> --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
> +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
> @@ -163,6 +163,10 @@ int bnxt_re_query_device(struct ib_device *ibdev,
> ib_attr->max_qp_init_rd_atom = dev_attr->max_qp_init_rd_atom;
> ib_attr->atomic_cap = IB_ATOMIC_NONE;
> ib_attr->masked_atomic_cap = IB_ATOMIC_NONE;
> + if (dev_attr->is_atomic) {
> + ib_attr->atomic_cap = IB_ATOMIC_GLOB;
> + ib_attr->masked_atomic_cap = IB_ATOMIC_GLOB;
> + }
>
> ib_attr->max_ee_rd_atom = 0;
> ib_attr->max_res_rd_atom = 0;
> diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
> index b090dfa4f4cb..0de4e22f9750 100644
> --- a/drivers/infiniband/hw/bnxt_re/main.c
> +++ b/drivers/infiniband/hw/bnxt_re/main.c
> @@ -128,6 +128,9 @@ static int bnxt_re_setup_chip_ctx(struct bnxt_re_dev *rdev, u8 wqe_mode)
> rdev->rcfw.res = &rdev->qplib_res;
>
> bnxt_re_set_drv_mode(rdev, wqe_mode);
> + if (bnxt_qplib_determine_atomics(en_dev->pdev))
> + ibdev_info(&rdev->ibdev,
> + "platform doesn't support global atomics.");
> return 0;
> }
>
> diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c
> index 3ca47004b752..108a591e66ff 100644
> --- a/drivers/infiniband/hw/bnxt_re/qplib_res.c
> +++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c
> @@ -959,3 +959,20 @@ int bnxt_qplib_alloc_res(struct bnxt_qplib_res *res, struct pci_dev *pdev,
> bnxt_qplib_free_res(res);
> return rc;
> }
> +
> +int bnxt_qplib_determine_atomics(struct pci_dev *dev)
> +{
> + int comp;
> + u16 ctl2;
> +
> + comp = pci_enable_atomic_ops_to_root(dev,
> + PCI_EXP_DEVCAP2_ATOMIC_COMP32);
> + if (comp)
> + return -ENOTSUPP;
I would say that it needs to be EOPNOTSUPP, not critical.
> + comp = pci_enable_atomic_ops_to_root(dev,
> + PCI_EXP_DEVCAP2_ATOMIC_COMP64);
> + if (comp)
> + return -ENOTSUPP;
Thanks
