1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/shpchp_sysfs.c b/drivers/pci/hotplug/shpchp_sysfs.c
new file mode 100644
index 000000000..01d47a42d
--- /dev/null
+++ b/drivers/pci/hotplug/shpchp_sysfs.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Compaq Hot Plug Controller Driver
+ *
+ * Copyright (c) 1995,2001 Compaq Computer Corporation
+ * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (c) 2001 IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * Send feedback to <greg@kroah.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include "shpchp.h"
+
+
+/* A few routines that create sysfs entries for the hot plug controller */
+
+static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev;
+	struct resource *res;
+	struct pci_bus *bus;
+	size_t len = 0;
+	int busnr;
+
+	pdev = to_pci_dev(dev);
+	bus = pdev->subordinate;
+
+	len += sysfs_emit_at(buf, len, "Free resources: memory\n");
+	pci_bus_for_each_resource(bus, res) {
+		if (res && (res->flags & IORESOURCE_MEM) &&
+				!(res->flags & IORESOURCE_PREFETCH)) {
+			len += sysfs_emit_at(buf, len,
+					     "start = %8.8llx, length = %8.8llx\n",
+					     (unsigned long long)res->start,
+					     (unsigned long long)resource_size(res));
+		}
+	}
+	len += sysfs_emit_at(buf, len, "Free resources: prefetchable memory\n");
+	pci_bus_for_each_resource(bus, res) {
+		if (res && (res->flags & IORESOURCE_MEM) &&
+			       (res->flags & IORESOURCE_PREFETCH)) {
+			len += sysfs_emit_at(buf, len,
+					     "start = %8.8llx, length = %8.8llx\n",
+					     (unsigned long long)res->start,
+					     (unsigned long long)resource_size(res));
+		}
+	}
+	len += sysfs_emit_at(buf, len, "Free resources: IO\n");
+	pci_bus_for_each_resource(bus, res) {
+		if (res && (res->flags & IORESOURCE_IO)) {
+			len += sysfs_emit_at(buf, len,
+					     "start = %8.8llx, length = %8.8llx\n",
+					     (unsigned long long)res->start,
+					     (unsigned long long)resource_size(res));
+		}
+	}
+	len += sysfs_emit_at(buf, len, "Free resources: bus numbers\n");
+	for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {
+		if (!pci_find_bus(pci_domain_nr(bus), busnr))
+			break;
+	}
+	if (busnr < bus->busn_res.end)
+		len += sysfs_emit_at(buf, len,
+				     "start = %8.8x, length = %8.8x\n",
+				     busnr, (int)(bus->busn_res.end - busnr));
+
+	return len;
+}
+static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL);
+
+int shpchp_create_ctrl_files(struct controller *ctrl)
+{
+	return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
+}
+
+void shpchp_remove_ctrl_files(struct controller *ctrl)
+{
+	device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
+}