[v4,13/15] fpga: dfl: afu: add STP (SignalTap) support
diff mbox series

Message ID 1561610695-5414-14-git-send-email-hao.wu@intel.com
State Superseded, archived
Delegated to: Moritz Fischer
Headers show
Series
  • add new features for FPGA DFL drivers
Related show

Commit Message

Wu, Hao June 27, 2019, 4:44 a.m. UTC
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>
---
 drivers/fpga/dfl-afu-main.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

Patch
diff mbox series

diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index bcf6e28..8241ace 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -513,6 +513,36 @@  static void port_afu_uinit(struct platform_device *pdev,
 	.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,
@@ -527,6 +557,10 @@  static void port_afu_uinit(struct platform_device *pdev,
 		.ops = &port_err_ops,
 	},
 	{
+		.id_table = port_stp_id_table,
+		.ops = &port_stp_ops,
+	},
+	{
 		.ops = NULL,
 	}
 };