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path: root/drivers/pci/hotplug/cpqphp_sysfs.c
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Diffstat (limited to 'drivers/pci/hotplug/cpqphp_sysfs.c')
-rw-r--r--drivers/pci/hotplug/cpqphp_sysfs.c208
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/cpqphp_sysfs.c b/drivers/pci/hotplug/cpqphp_sysfs.c
new file mode 100644
index 000000000..fed1360ee
--- /dev/null
+++ b/drivers/pci/hotplug/cpqphp_sysfs.c
@@ -0,0 +1,208 @@
+// 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/slab.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
+#include <linux/mutex.h>
+#include <linux/debugfs.h>
+#include "cpqphp.h"
+
+static DEFINE_MUTEX(cpqphp_mutex);
+static int show_ctrl(struct controller *ctrl, char *buf)
+{
+ char *out = buf;
+ int index;
+ struct pci_resource *res;
+
+ out += sprintf(buf, "Free resources: memory\n");
+ index = 11;
+ res = ctrl->mem_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+ out += sprintf(out, "Free resources: prefetchable memory\n");
+ index = 11;
+ res = ctrl->p_mem_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+ out += sprintf(out, "Free resources: IO\n");
+ index = 11;
+ res = ctrl->io_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+ out += sprintf(out, "Free resources: bus numbers\n");
+ index = 11;
+ res = ctrl->bus_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+
+ return out - buf;
+}
+
+static int show_dev(struct controller *ctrl, char *buf)
+{
+ char *out = buf;
+ int index;
+ struct pci_resource *res;
+ struct pci_func *new_slot;
+ struct slot *slot;
+
+ slot = ctrl->slot;
+
+ while (slot) {
+ new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
+ if (!new_slot)
+ break;
+ out += sprintf(out, "assigned resources: memory\n");
+ index = 11;
+ res = new_slot->mem_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+ out += sprintf(out, "assigned resources: prefetchable memory\n");
+ index = 11;
+ res = new_slot->p_mem_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+ out += sprintf(out, "assigned resources: IO\n");
+ index = 11;
+ res = new_slot->io_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+ out += sprintf(out, "assigned resources: bus numbers\n");
+ index = 11;
+ res = new_slot->bus_head;
+ while (res && index--) {
+ out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+ res = res->next;
+ }
+ slot = slot->next;
+ }
+
+ return out - buf;
+}
+
+static int spew_debug_info(struct controller *ctrl, char *data, int size)
+{
+ int used;
+
+ used = size - show_ctrl(ctrl, data);
+ used = (size - used) - show_dev(ctrl, &data[used]);
+ return used;
+}
+
+struct ctrl_dbg {
+ int size;
+ char *data;
+ struct controller *ctrl;
+};
+
+#define MAX_OUTPUT (4*PAGE_SIZE)
+
+static int open(struct inode *inode, struct file *file)
+{
+ struct controller *ctrl = inode->i_private;
+ struct ctrl_dbg *dbg;
+ int retval = -ENOMEM;
+
+ mutex_lock(&cpqphp_mutex);
+ dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
+ if (!dbg)
+ goto exit;
+ dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
+ if (!dbg->data) {
+ kfree(dbg);
+ goto exit;
+ }
+ dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
+ file->private_data = dbg;
+ retval = 0;
+exit:
+ mutex_unlock(&cpqphp_mutex);
+ return retval;
+}
+
+static loff_t lseek(struct file *file, loff_t off, int whence)
+{
+ struct ctrl_dbg *dbg = file->private_data;
+ return fixed_size_llseek(file, off, whence, dbg->size);
+}
+
+static ssize_t read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ struct ctrl_dbg *dbg = file->private_data;
+ return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
+}
+
+static int release(struct inode *inode, struct file *file)
+{
+ struct ctrl_dbg *dbg = file->private_data;
+
+ kfree(dbg->data);
+ kfree(dbg);
+ return 0;
+}
+
+static const struct file_operations debug_ops = {
+ .owner = THIS_MODULE,
+ .open = open,
+ .llseek = lseek,
+ .read = read,
+ .release = release,
+};
+
+static struct dentry *root;
+
+void cpqhp_initialize_debugfs(void)
+{
+ if (!root)
+ root = debugfs_create_dir("cpqhp", NULL);
+}
+
+void cpqhp_shutdown_debugfs(void)
+{
+ debugfs_remove(root);
+}
+
+void cpqhp_create_debugfs_files(struct controller *ctrl)
+{
+ ctrl->dentry = debugfs_create_file(dev_name(&ctrl->pci_dev->dev),
+ S_IRUGO, root, ctrl, &debug_ops);
+}
+
+void cpqhp_remove_debugfs_files(struct controller *ctrl)
+{
+ debugfs_remove(ctrl->dentry);
+ ctrl->dentry = NULL;
+}
+