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fpga: dfl: fme: add capability sysfs interfaces

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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 <[email protected]>
Signed-off-by: Xu Yilun <[email protected]>
Signed-off-by: Wu Hao <[email protected]>
Acked-by: Alan Tull <[email protected]>
Signed-off-by: Moritz Fischer <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Wu Hao 2019-08-04 18:20:20 +08:00 • committed by Greg Kroah-Hartman
commit 52eb6d31a1
2 changed files with 71 additions and 0 deletions
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48
drivers/fpga/dfl-fme-main.c
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@ -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);