summaryrefslogtreecommitdiffstats
path: root/drivers/fpga
diff options
context:
space:
mode:
authorWu Hao <hao.wu@intel.com>2019-08-12 10:50:02 +0800
committerMoritz Fischer <mdf@kernel.org>2019-09-03 19:35:41 -0700
commitbd127b8191cf22adac9dedeca4f38093d61ff1ca (patch)
treeeb730d11fedca04637f7cb726032607d0da04612 /drivers/fpga
parent44d247534ff266404ccb44c2f52131a850348919 (diff)
downloadlinux-bd127b8191cf22adac9dedeca4f38093d61ff1ca.tar.bz2
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>
Diffstat (limited to 'drivers/fpga')
-rw-r--r--drivers/fpga/dfl-afu-main.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index e11352af1324..e4a34dc7947f 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -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,
@@ -522,6 +543,10 @@ static struct dfl_feature_driver port_feature_drvs[] = {
.ops = &port_err_ops,
},
{
+ .id_table = port_stp_id_table,
+ .ops = &port_stp_ops,
+ },
+ {
.ops = NULL,
}
};