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path: root/drivers/pci/hotplug
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-rw-r--r--drivers/pci/hotplug/cpqphp.h8
-rw-r--r--drivers/pci/hotplug/cpqphp_core.c6
-rw-r--r--drivers/pci/hotplug/cpqphp_sysfs.c138
3 files changed, 127 insertions, 25 deletions
diff --git a/drivers/pci/hotplug/cpqphp.h b/drivers/pci/hotplug/cpqphp.h
index 092491e25ef..cb88404c89f 100644
--- a/drivers/pci/hotplug/cpqphp.h
+++ b/drivers/pci/hotplug/cpqphp.h
@@ -317,6 +317,7 @@ struct controller {
u16 vendor_id;
struct work_struct int_task_event;
wait_queue_head_t queue; /* sleep & wake process */
+ struct dentry *dentry; /* debugfs dentry */
};
struct irq_mapping {
@@ -399,8 +400,11 @@ struct resource_lists {
#define msg_button_ignore "PCI slot #%d - button press ignored. (action in progress...)\n"
-/* sysfs functions for the hotplug controller info */
-extern void cpqhp_create_ctrl_files (struct controller *ctrl);
+/* debugfs functions for the hotplug controller info */
+extern void cpqhp_initialize_debugfs (void);
+extern void cpqhp_shutdown_debugfs (void);
+extern void cpqhp_create_debugfs_files (struct controller *ctrl);
+extern void cpqhp_remove_debugfs_files (struct controller *ctrl);
/* controller functions */
extern void cpqhp_pushbutton_thread (unsigned long event_pointer);
diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index d3644709a03..b3659ffccac 100644
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -479,6 +479,8 @@ static int ctrl_slot_cleanup (struct controller * ctrl)
old_slot = next_slot;
}
+ cpqhp_remove_debugfs_files(ctrl);
+
//Free IRQ associated with hot plug device
free_irq(ctrl->interrupt, ctrl);
//Unmap the memory
@@ -1275,7 +1277,7 @@ static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
// Done with exclusive hardware access
up(&ctrl->crit_sect);
- cpqhp_create_ctrl_files(ctrl);
+ cpqhp_create_debugfs_files(ctrl);
return 0;
@@ -1515,6 +1517,7 @@ static int __init cpqhpc_init(void)
cpqhp_debug = debug;
info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
+ cpqhp_initialize_debugfs();
result = pci_register_driver(&cpqhpc_driver);
dbg("pci_register_driver = %d\n", result);
return result;
@@ -1528,6 +1531,7 @@ static void __exit cpqhpc_cleanup(void)
dbg("pci_unregister_driver\n");
pci_unregister_driver(&cpqhpc_driver);
+ cpqhp_shutdown_debugfs();
}
diff --git a/drivers/pci/hotplug/cpqphp_sysfs.c b/drivers/pci/hotplug/cpqphp_sysfs.c
index 4c11048ad51..bbfeed767ff 100644
--- a/drivers/pci/hotplug/cpqphp_sysfs.c
+++ b/drivers/pci/hotplug/cpqphp_sysfs.c
@@ -33,22 +33,15 @@
#include <linux/proc_fs.h>
#include <linux/workqueue.h>
#include <linux/pci.h>
+#include <linux/debugfs.h>
#include "cpqphp.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)
+static int show_ctrl (struct controller *ctrl, char *buf)
{
- struct pci_dev *pci_dev;
- struct controller *ctrl;
- char * out = buf;
+ char *out = buf;
int index;
struct pci_resource *res;
- pci_dev = container_of (dev, struct pci_dev, dev);
- ctrl = pci_get_drvdata(pci_dev);
-
out += sprintf(buf, "Free resources: memory\n");
index = 11;
res = ctrl->mem_head;
@@ -80,22 +73,16 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha
return out - buf;
}
-static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
-static ssize_t show_dev (struct device *dev, struct device_attribute *attr, char *buf)
+static int show_dev (struct controller *ctrl, char *buf)
{
- struct pci_dev *pci_dev;
- struct controller *ctrl;
char * out = buf;
int index;
struct pci_resource *res;
struct pci_func *new_slot;
struct slot *slot;
- pci_dev = container_of (dev, struct pci_dev, dev);
- ctrl = pci_get_drvdata(pci_dev);
-
- slot=ctrl->slot;
+ slot = ctrl->slot;
while (slot) {
new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
@@ -134,10 +121,117 @@ static ssize_t show_dev (struct device *dev, struct device_attribute *attr, char
return out - buf;
}
-static DEVICE_ATTR (dev, S_IRUGO, show_dev, NULL);
-void cpqhp_create_ctrl_files (struct controller *ctrl)
+static int spew_debug_info(struct controller *ctrl, char *data, int size)
{
- device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
- device_create_file (&ctrl->pci_dev->dev, &dev_attr_dev);
+ 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->u.generic_ip;
+ struct ctrl_dbg *dbg;
+ int retval = -ENOMEM;
+
+ lock_kernel();
+ 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:
+ unlock_kernel();
+ return retval;
+}
+
+static loff_t lseek(struct file *file, loff_t off, int whence)
+{
+ struct ctrl_dbg *dbg;
+ loff_t new = -1;
+
+ lock_kernel();
+ dbg = file->private_data;
+
+ switch (whence) {
+ case 0:
+ new = off;
+ break;
+ case 1:
+ new = file->f_pos + off;
+ break;
+ }
+ if (new < 0 || new > dbg->size) {
+ unlock_kernel();
+ return -EINVAL;
+ }
+ unlock_kernel();
+ return (file->f_pos = new);
}
+
+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 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(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops);
+}
+
+void cpqhp_remove_debugfs_files(struct controller *ctrl)
+{
+ if (ctrl->dentry)
+ debugfs_remove(ctrl->dentry);
+ ctrl->dentry = NULL;
+}
+
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-02 22:43:52 +0000