[PATCH v3 09/12] fpga: dfl: afu: add STP (SignalTap) support
From: Wu Hao <hidden>
Date: 2019-07-23 05:10:33
Also in:
linux-doc, linux-fpga, lkml
Subsystem:
fpga dfl drivers, fpga manager framework, the rest · Maintainers:
Xu Yilun, Moritz Fischer, Linus Torvalds
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 <redacted> Acked-by: Moritz Fischer <mdf@kernel.org> Acked-by: Alan Tull <atull@kernel.org> Signed-off-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 15dd4cb..395f96e 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c@@ -514,6 +514,36 @@ 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,
@@ -528,6 +558,10 @@ 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, } };
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1.8.3.1