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authorWu Hao <hao.wu@intel.com>2019-08-04 18:20:20 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-08-05 18:03:20 +0200
commit52eb6d31a1c2e85a3eaf08ab599c9ad58c890c28 (patch)
treeabd8ffe50dd540c48f563bed5e734ed5c30797b2 /drivers/fpga
parent3c51ff772278d291117dae9cad09ddef07e0d504 (diff)
downloadlinux-52eb6d31a1c2e85a3eaf08ab599c9ad58c890c28.tar.bz2
fpga: dfl: fme: add capability sysfs interfaces
This patch adds 3 read-only sysfs interfaces for FPGA Management Engine (FME) block for capabilities including cache_size, fabric_version and socket_id. Signed-off-by: Luwei Kang <luwei.kang@intel.com> Signed-off-by: Xu Yilun <yilun.xu@intel.com> Signed-off-by: Wu Hao <hao.wu@intel.com> Acked-by: Alan Tull <atull@kernel.org> Signed-off-by: Moritz Fischer <mdf@kernel.org> Link: https://lore.kernel.org/r/1564914022-3710-11-git-send-email-hao.wu@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga')
-rw-r--r--drivers/fpga/dfl-fme-main.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
index 5fdce548f821..f033f1cfd3ed 100644
--- a/drivers/fpga/dfl-fme-main.c
+++ b/drivers/fpga/dfl-fme-main.c
@@ -73,10 +73,58 @@ static ssize_t bitstream_metadata_show(struct device *dev,
}
static DEVICE_ATTR_RO(bitstream_metadata);
+static ssize_t cache_size_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ void __iomem *base;
+ u64 v;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
+
+ v = readq(base + FME_HDR_CAP);
+
+ return sprintf(buf, "%u\n",
+ (unsigned int)FIELD_GET(FME_CAP_CACHE_SIZE, v));
+}
+static DEVICE_ATTR_RO(cache_size);
+
+static ssize_t fabric_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ void __iomem *base;
+ u64 v;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
+
+ v = readq(base + FME_HDR_CAP);
+
+ return sprintf(buf, "%u\n",
+ (unsigned int)FIELD_GET(FME_CAP_FABRIC_VERID, v));
+}
+static DEVICE_ATTR_RO(fabric_version);
+
+static ssize_t socket_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ void __iomem *base;
+ u64 v;
+
+ base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER);
+
+ v = readq(base + FME_HDR_CAP);
+
+ return sprintf(buf, "%u\n",
+ (unsigned int)FIELD_GET(FME_CAP_SOCKET_ID, v));
+}
+static DEVICE_ATTR_RO(socket_id);
+
static struct attribute *fme_hdr_attrs[] = {
&dev_attr_ports_num.attr,
&dev_attr_bitstream_id.attr,
&dev_attr_bitstream_metadata.attr,
+ &dev_attr_cache_size.attr,
+ &dev_attr_fabric_version.attr,
+ &dev_attr_socket_id.attr,
NULL,
};
ATTRIBUTE_GROUPS(fme_hdr);