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-rw-r--r--drivers/usb/host/ohci-dbg.c213
-rw-r--r--drivers/usb/host/ohci-hcd.c18
-rw-r--r--drivers/usb/host/ohci.h7
3 files changed, 209 insertions, 29 deletions
diff --git a/drivers/usb/host/ohci-dbg.c b/drivers/usb/host/ohci-dbg.c
index 9bd58980624..a22c30aa745 100644
--- a/drivers/usb/host/ohci-dbg.c
+++ b/drivers/usb/host/ohci-dbg.c
@@ -401,6 +401,42 @@ static inline void remove_debug_files (struct ohci_hcd *bus) { }
#else
+static int debug_async_open(struct inode *, struct file *);
+static int debug_periodic_open(struct inode *, struct file *);
+static int debug_registers_open(struct inode *, struct file *);
+static int debug_async_open(struct inode *, struct file *);
+static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
+static int debug_close(struct inode *, struct file *);
+
+static const struct file_operations debug_async_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_async_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+static const struct file_operations debug_periodic_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_periodic_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+static const struct file_operations debug_registers_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_registers_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+
+static struct dentry *ohci_debug_root;
+
+struct debug_buffer {
+ ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
+ struct device *dev;
+ struct mutex mutex; /* protect filling of buffer */
+ size_t count; /* number of characters filled into buffer */
+ char *page;
+};
+
static ssize_t
show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed)
{
@@ -467,8 +503,7 @@ show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed)
return count - size;
}
-static ssize_t
-show_async(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t fill_async_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
@@ -476,25 +511,23 @@ show_async(struct device *dev, struct device_attribute *attr, char *buf)
size_t temp;
unsigned long flags;
- bus = dev_get_drvdata(dev);
+ bus = dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ohci = hcd_to_ohci(hcd);
/* display control and bulk lists together, for simplicity */
spin_lock_irqsave (&ohci->lock, flags);
- temp = show_list (ohci, buf, PAGE_SIZE, ohci->ed_controltail);
- temp += show_list (ohci, buf + temp, PAGE_SIZE - temp, ohci->ed_bulktail);
+ temp = show_list(ohci, buf->page, buf->count, ohci->ed_controltail);
+ temp += show_list(ohci, buf->page + temp, buf->count - temp,
+ ohci->ed_bulktail);
spin_unlock_irqrestore (&ohci->lock, flags);
return temp;
}
-static DEVICE_ATTR(async, S_IRUGO, show_async, NULL);
-
#define DBG_SCHED_LIMIT 64
-static ssize_t
-show_periodic(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
@@ -509,10 +542,10 @@ show_periodic(struct device *dev, struct device_attribute *attr, char *buf)
return 0;
seen_count = 0;
- bus = dev_get_drvdata(dev);
+ bus = (struct usb_bus *)dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ohci = hcd_to_ohci(hcd);
- next = buf;
+ next = buf->page;
size = PAGE_SIZE;
temp = scnprintf (next, size, "size = %d\n", NUM_INTS);
@@ -589,13 +622,9 @@ show_periodic(struct device *dev, struct device_attribute *attr, char *buf)
return PAGE_SIZE - size;
}
-static DEVICE_ATTR(periodic, S_IRUGO, show_periodic, NULL);
-
-
#undef DBG_SCHED_LIMIT
-static ssize_t
-show_registers(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t fill_registers_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
@@ -606,11 +635,11 @@ show_registers(struct device *dev, struct device_attribute *attr, char *buf)
char *next;
u32 rdata;
- bus = dev_get_drvdata(dev);
+ bus = (struct usb_bus *)dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ohci = hcd_to_ohci(hcd);
regs = ohci->regs;
- next = buf;
+ next = buf->page;
size = PAGE_SIZE;
spin_lock_irqsave (&ohci->lock, flags);
@@ -677,29 +706,155 @@ show_registers(struct device *dev, struct device_attribute *attr, char *buf)
done:
spin_unlock_irqrestore (&ohci->lock, flags);
+
return PAGE_SIZE - size;
}
-static DEVICE_ATTR(registers, S_IRUGO, show_registers, NULL);
+static struct debug_buffer *alloc_buffer(struct device *dev,
+ ssize_t (*fill_func)(struct debug_buffer *))
+{
+ struct debug_buffer *buf;
+
+ buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
+ if (buf) {
+ buf->dev = dev;
+ buf->fill_func = fill_func;
+ mutex_init(&buf->mutex);
+ }
+
+ return buf;
+}
+
+static int fill_buffer(struct debug_buffer *buf)
+{
+ int ret = 0;
+
+ if (!buf->page)
+ buf->page = (char *)get_zeroed_page(GFP_KERNEL);
+
+ if (!buf->page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = buf->fill_func(buf);
+
+ if (ret >= 0) {
+ buf->count = ret;
+ ret = 0;
+ }
+
+out:
+ return ret;
+}
+
+static ssize_t debug_output(struct file *file, char __user *user_buf,
+ size_t len, loff_t *offset)
+{
+ struct debug_buffer *buf = file->private_data;
+ int ret = 0;
+
+ mutex_lock(&buf->mutex);
+ if (buf->count == 0) {
+ ret = fill_buffer(buf);
+ if (ret != 0) {
+ mutex_unlock(&buf->mutex);
+ goto out;
+ }
+ }
+ mutex_unlock(&buf->mutex);
+
+ ret = simple_read_from_buffer(user_buf, len, offset,
+ buf->page, buf->count);
+
+out:
+ return ret;
+
+}
+
+static int debug_close(struct inode *inode, struct file *file)
+{
+ struct debug_buffer *buf = file->private_data;
+
+ if (buf) {
+ if (buf->page)
+ free_page((unsigned long)buf->page);
+ kfree(buf);
+ }
+
+ return 0;
+}
+static int debug_async_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
+
+static int debug_periodic_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private,
+ fill_periodic_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
+
+static int debug_registers_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private,
+ fill_registers_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
static inline void create_debug_files (struct ohci_hcd *ohci)
{
- struct device *dev = ohci_to_hcd(ohci)->self.dev;
- int retval;
+ struct usb_bus *bus = &ohci_to_hcd(ohci)->self;
+ struct device *dev = bus->dev;
+
+ ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root);
+ if (!ohci->debug_dir)
+ goto dir_error;
+
+ ohci->debug_async = debugfs_create_file("async", S_IRUGO,
+ ohci->debug_dir, dev,
+ &debug_async_fops);
+ if (!ohci->debug_async)
+ goto async_error;
+
+ ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
+ ohci->debug_dir, dev,
+ &debug_periodic_fops);
+ if (!ohci->debug_periodic)
+ goto periodic_error;
+
+ ohci->debug_registers = debugfs_create_file("registers", S_IRUGO,
+ ohci->debug_dir, dev,
+ &debug_registers_fops);
+ if (!ohci->debug_registers)
+ goto registers_error;
- retval = device_create_file(dev, &dev_attr_async);
- retval = device_create_file(dev, &dev_attr_periodic);
- retval = device_create_file(dev, &dev_attr_registers);
ohci_dbg (ohci, "created debug files\n");
+ return;
+
+registers_error:
+ debugfs_remove(ohci->debug_periodic);
+periodic_error:
+ debugfs_remove(ohci->debug_async);
+async_error:
+ debugfs_remove(ohci->debug_dir);
+dir_error:
+ ohci->debug_periodic = NULL;
+ ohci->debug_async = NULL;
+ ohci->debug_dir = NULL;
}
static inline void remove_debug_files (struct ohci_hcd *ohci)
{
- struct device *dev = ohci_to_hcd(ohci)->self.dev;
-
- device_remove_file(dev, &dev_attr_async);
- device_remove_file(dev, &dev_attr_periodic);
- device_remove_file(dev, &dev_attr_registers);
+ debugfs_remove(ohci->debug_registers);
+ debugfs_remove(ohci->debug_periodic);
+ debugfs_remove(ohci->debug_async);
+ debugfs_remove(ohci->debug_dir);
}
#endif
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index ddd4ee1f241..baca09af607 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -36,6 +36,7 @@
#include <linux/dmapool.h>
#include <linux/reboot.h>
#include <linux/workqueue.h>
+#include <linux/debugfs.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -1068,6 +1069,14 @@ static int __init ohci_hcd_mod_init(void)
pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
sizeof (struct ed), sizeof (struct td));
+#ifdef DEBUG
+ ohci_debug_root = debugfs_create_dir("ohci", NULL);
+ if (!ohci_debug_root) {
+ retval = -ENOENT;
+ goto error_debug;
+ }
+#endif
+
#ifdef PS3_SYSTEM_BUS_DRIVER
retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
if (retval < 0)
@@ -1130,6 +1139,12 @@ static int __init ohci_hcd_mod_init(void)
ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
error_ps3:
#endif
+#ifdef DEBUG
+ debugfs_remove(ohci_debug_root);
+ ohci_debug_root = NULL;
+ error_debug:
+#endif
+
return retval;
}
module_init(ohci_hcd_mod_init);
@@ -1154,6 +1169,9 @@ static void __exit ohci_hcd_mod_exit(void)
#ifdef PS3_SYSTEM_BUS_DRIVER
ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
#endif
+#ifdef DEBUG
+ debugfs_remove(ohci_debug_root);
+#endif
}
module_exit(ohci_hcd_mod_exit);
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index 47c5c66a282..dc544ddc784 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -408,6 +408,13 @@ struct ohci_hcd {
unsigned eds_scheduled;
struct ed *ed_to_check;
unsigned zf_delay;
+
+#ifdef DEBUG
+ struct dentry *debug_dir;
+ struct dentry *debug_async;
+ struct dentry *debug_periodic;
+ struct dentry *debug_registers;
+#endif
};
#ifdef CONFIG_PCI
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 03:17:20 +0000