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SubjectRe: [PATCH 12/17] fpga: dfl: afu: add STP (SignalTap) support
Hi Wu,

On Mon, Mar 25, 2019 at 11:07:39AM +0800, Wu Hao wrote:
> STP (SignalTap) is one of the private features under the port for
> debugging. This patch adds private feature driver support for it
> to allow userspace applications to mmap related mmio region and
> provide STP service.
>
> Signed-off-by: Xu Yilun <yilun.xu@intel.com>
> Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Moritz Fischer <mdf@kernel.org>
> ---
> drivers/fpga/dfl-afu-main.c | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
> index 754729e..14970a4 100644
> --- a/drivers/fpga/dfl-afu-main.c
> +++ b/drivers/fpga/dfl-afu-main.c
> @@ -518,6 +518,36 @@ static const struct dfl_feature_ops port_afu_ops = {
> .uinit = port_afu_uinit,
> };
>
> +static int port_stp_init(struct platform_device *pdev,
> + struct dfl_feature *feature)
> +{
> + struct resource *res = &pdev->resource[feature->resource_index];
> +
> + dev_dbg(&pdev->dev, "PORT STP Init.\n");
> +
> + return afu_mmio_region_add(dev_get_platdata(&pdev->dev),
> + DFL_PORT_REGION_INDEX_STP,
> + resource_size(res), res->start,
> + DFL_PORT_REGION_MMAP | DFL_PORT_REGION_READ |
> + DFL_PORT_REGION_WRITE);
> +}
> +
> +static void port_stp_uinit(struct platform_device *pdev,
> + struct dfl_feature *feature)
> +{
> + dev_dbg(&pdev->dev, "PORT STP UInit.\n");
> +}
> +
> +static const struct dfl_feature_id port_stp_id_table[] = {
> + {.id = PORT_FEATURE_ID_STP,},
> + {0,}
> +};
> +
> +static const struct dfl_feature_ops port_stp_ops = {
> + .init = port_stp_init,
> + .uinit = port_stp_uinit,
> +};
> +
> static struct dfl_feature_driver port_feature_drvs[] = {
> {
> .id_table = port_hdr_id_table,
> @@ -532,6 +562,10 @@ static struct dfl_feature_driver port_feature_drvs[] = {
> .ops = &port_err_ops,
> },
> {
> + .id_table = port_stp_id_table,
> + .ops = &port_stp_ops,
> + },
> + {
> .ops = NULL,
> }
> };
> --
> 2.7.4
>

Thanks,
Moritz

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