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fpga: dfl: afu: add STP (SignalTap) support 

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>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
This commit is contained in:
Wu Hao 2019-08-12 10:50:02 +08:00 committed by Moritz Fischer
parent 44d247534f
commit bd127b8191
1 changed files with 25 additions and 0 deletions
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25
drivers/fpga/dfl-afu-main.c
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@ -508,6 +508,27 @@ static const struct dfl_feature_ops port_afu_ops = {
.init = port_afu_init,
};
static int port_stp_init(struct platform_device *pdev,
struct dfl_feature *feature)
{
struct resource *res = &pdev->resource[feature->resource_index];
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 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,
};
static struct dfl_feature_driver port_feature_drvs[] = {
{
.id_table = port_hdr_id_table,
@ -521,6 +542,10 @@ static struct dfl_feature_driver port_feature_drvs[] = {
.id_table = port_err_id_table,
.ops = &port_err_ops,
},
{
.id_table = port_stp_id_table,
.ops = &port_stp_ops,
},
{
.ops = NULL,
}