From: Kang Luwei <luwei.k...@intel.com>
The header register set is always present for FPGA Management Engine (FME),
this patch implements init and uinit function for header sub feature and
introduce several read-only sysfs interfaces for the capability and status.
Sysfs interfaces:
* /sys/class/fpga/<fpga.x>/<intel-fpga-fme.x>/ports_num
Read-only. Number of ports implemented
* /sys/class/fpga/<fpga.x>/<intel-fpga-fme.x>/bitstream_id
Read-only. Blue Bitstream identifier number
* /sys/class/fpga/<fpga.x>/<intel-fpga-fme.x>/bitstream_metadata
Read-only. Blue Bitstream meta data
Signed-off-by: Tim Whisonant <tim.whison...@intel.com>
Signed-off-by: Enno Luebbers <enno.luebb...@intel.com>
Signed-off-by: Shiva Rao <shiva....@intel.com>
Signed-off-by: Christopher Rauer <christopher.ra...@intel.com>
Signed-off-by: Kang Luwei <luwei.k...@intel.com>
Signed-off-by: Xiao Guangrong <guangrong.x...@linux.intel.com>
Signed-off-by: Wu Hao <hao...@intel.com>
---
drivers/fpga/intel/feature-dev.h | 3 +++
drivers/fpga/intel/fme-main.c | 55 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 58 insertions(+)
diff --git a/drivers/fpga/intel/feature-dev.h b/drivers/fpga/intel/feature-dev.h
index 9d39b94..dccc283 100644
--- a/drivers/fpga/intel/feature-dev.h
+++ b/drivers/fpga/intel/feature-dev.h
@@ -124,6 +124,9 @@ struct feature_fme_header {
u64 rsvd[2];
struct feature_fme_capability capability;
struct feature_fme_port port[MAX_FPGA_PORT_NUM];
+ u64 rsvd1;
+ u64 bitstream_id;
+ u64 bitstream_md;
};
/* FME Thermal Sub Feature Register Set */
diff --git a/drivers/fpga/intel/fme-main.c b/drivers/fpga/intel/fme-main.c
index c603268..a7c69fc 100644
--- a/drivers/fpga/intel/fme-main.c
+++ b/drivers/fpga/intel/fme-main.c
@@ -23,15 +23,70 @@
#include "feature-dev.h"
+static ssize_t ports_num_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct feature_fme_header *fme_hdr
+ = get_feature_ioaddr_by_index(dev, FME_FEATURE_ID_HEADER);
+ struct feature_fme_capability fme_capability;
+
+ fme_capability.csr = readq(&fme_hdr->capability);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", fme_capability.num_ports);
+}
+static DEVICE_ATTR_RO(ports_num);
+
+static ssize_t bitstream_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct feature_fme_header *fme_hdr
+ = get_feature_ioaddr_by_index(dev, FME_FEATURE_ID_HEADER);
+ u64 bitstream_id = readq(&fme_hdr->bitstream_id);
+
+ return scnprintf(buf, PAGE_SIZE, "0x%llx\n",
+ (unsigned long long)bitstream_id);
+}
+static DEVICE_ATTR_RO(bitstream_id);
+
+static ssize_t bitstream_metadata_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct feature_fme_header *fme_hdr
+ = get_feature_ioaddr_by_index(dev, FME_FEATURE_ID_HEADER);
+ u64 bitstream_md = readq(&fme_hdr->bitstream_md);
+
+ return scnprintf(buf, PAGE_SIZE, "0x%llx\n",
+ (unsigned long long)bitstream_md);
+}
+static DEVICE_ATTR_RO(bitstream_metadata);
+
+static const struct attribute *fme_hdr_attrs[] = {
+ &dev_attr_ports_num.attr,
+ &dev_attr_bitstream_id.attr,
+ &dev_attr_bitstream_metadata.attr,
+ NULL,
+};
+
static int fme_hdr_init(struct platform_device *pdev, struct feature *feature)
{
+ struct feature_fme_header *fme_hdr = feature->ioaddr;
+ int ret;
+
dev_dbg(&pdev->dev, "FME HDR Init.\n");
+ dev_dbg(&pdev->dev, "FME cap %llx.\n",
+ (unsigned long long)fme_hdr->capability.csr);
+
+ ret = sysfs_create_files(&pdev->dev.kobj, fme_hdr_attrs);
+ if (ret)
+ return ret;
+
return 0;
}
static void fme_hdr_uinit(struct platform_device *pdev, struct feature
*feature)
{
dev_dbg(&pdev->dev, "FME HDR UInit.\n");
+ sysfs_remove_files(&pdev->dev.kobj, fme_hdr_attrs);
}
struct feature_ops fme_hdr_ops = {
--
2.7.4
