[PATCH 3/3] cxl/mem: Add partition information to sysfs

[ira.weiny@intel.com]

From: Ira Weiny <ira.weiny@intel.com>

Partitionable space is added to the ram and pmem size sysfs attributes
but this does not show the entire story.

Add full partition information about the device under <sysfs>/partition.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
 drivers/cxl/pci.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index bcc2829e4475..7e4e9605e4ed 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -1226,6 +1226,42 @@ static ssize_t pmem_size_show(struct device *dev, struct device_attribute *attr,
 static struct device_attribute dev_attr_pmem_size =
 	__ATTR(size, 0444, pmem_size_show, NULL);
 
+static ssize_t part_vo_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
+	struct cxl_mem *cxlm = cxlmd->cxlm;
+
+	return sysfs_emit(buf, "%#llx\n", cxlm->volatile_cap_bytes);
+}
+
+static struct device_attribute dev_attr_part_vo =
+	__ATTR(volatile_only, 0444, part_vo_show, NULL);
+
+static ssize_t part_po_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
+	struct cxl_mem *cxlm = cxlmd->cxlm;
+
+	return sysfs_emit(buf, "%#llx\n", cxlm->persistent_cap_bytes);
+}
+
+static struct device_attribute dev_attr_part_po =
+	__ATTR(persistent_only, 0444, part_po_show, NULL);
+
+static ssize_t part_total_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
+	struct cxl_mem *cxlm = cxlmd->cxlm;
+
+	return sysfs_emit(buf, "%#llx\n", cxlm->total_cap_bytes);
+}
+
+static struct device_attribute dev_attr_part_total =
+	__ATTR(total, 0444, part_total_show, NULL);
+
 static struct attribute *cxl_memdev_attributes[] = {
 	&dev_attr_firmware_version.attr,
 	&dev_attr_payload_max.attr,
@@ -1243,6 +1279,13 @@ static struct attribute *cxl_memdev_ram_attributes[] = {
 	NULL,
 };
 
+static struct attribute *cxl_memdev_part_attributes[] = {
+	&dev_attr_part_vo.attr,
+	&dev_attr_part_po.attr,
+	&dev_attr_part_total.attr,
+	NULL,
+};
+
 static struct attribute_group cxl_memdev_attribute_group = {
 	.attrs = cxl_memdev_attributes,
 };
@@ -1257,10 +1300,16 @@ static struct attribute_group cxl_memdev_pmem_attribute_group = {
 	.attrs = cxl_memdev_pmem_attributes,
 };
 
+static struct attribute_group cxl_memdev_part_attribute_group = {
+	.name = "partition",
+	.attrs = cxl_memdev_part_attributes,
+};
+
 static const struct attribute_group *cxl_memdev_attribute_groups[] = {
 	&cxl_memdev_attribute_group,
 	&cxl_memdev_ram_attribute_group,
 	&cxl_memdev_pmem_attribute_group,
+	&cxl_memdev_part_attribute_group,
 	NULL,
 };
 
-- 
2.28.0.rc0.12.gb6a658bd00c9