diff options
Diffstat (limited to 'drivers/gpu/arm/mali/linux/mali_kernel_sysfs.c')
| -rw-r--r-- | drivers/gpu/arm/mali/linux/mali_kernel_sysfs.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/gpu/arm/mali/linux/mali_kernel_sysfs.c b/drivers/gpu/arm/mali/linux/mali_kernel_sysfs.c new file mode 100644 index 000000000000..62c7fba8791e --- /dev/null +++ b/drivers/gpu/arm/mali/linux/mali_kernel_sysfs.c @@ -0,0 +1,137 @@ +/** + * Copyright (C) 2011 ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence. + * + * A copy of the licence is included with the program, and can also be obtained from Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + + +/** + * @file mali_kernel_sysfs.c + * Implementation of some sysfs data exports + */ +#include <linux/fs.h> /* file system operations */ +#include <linux/device.h> +#include <linux/seq_file.h> +#include <linux/debugfs.h> + +/* the mali kernel subsystem types */ +#include "mali_kernel_subsystem.h" + +#include "mali_kernel_linux.h" +#include "mali_kernel_sysfs.h" + +#include "mali_kernel_license.h" + +#if MALI_LICENSE_IS_GPL +static struct dentry *mali_debugfs_dir; +#endif + + +#if MALI_STATE_TRACKING +static int mali_seq_internal_state_show(struct seq_file *seq_file, void *v) +{ + u32 len = 0; + u32 size; + char *buf; + + size = seq_get_buf(seq_file, &buf); + + if(!size) + { + return -ENOMEM; + } + + /* Create the internal state dump. */ + len = snprintf(buf+len, size-len, "Mali device driver %s\n", SVN_REV_STRING); + len += snprintf(buf+len, size-len, "License: %s\n\n", MALI_KERNEL_LINUX_LICENSE); + + len += _mali_kernel_core_dump_state(buf + len, size - len); + + seq_commit(seq_file, len); + + return 0; +} + +static int mali_seq_internal_state_open(struct inode *inode, struct file *file) +{ + return single_open(file, mali_seq_internal_state_show, NULL); +} + +static const struct file_operations mali_seq_internal_state_fops = { + .owner = THIS_MODULE, + .open = mali_seq_internal_state_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif /* MALI_STATE_TRACKING */ + +int mali_sysfs_register(struct mali_dev *device, dev_t dev, const char *mali_dev_name) +{ + int err = 0; +#if MALI_LICENSE_IS_GPL + struct device * mdev; + + device->mali_class = class_create(THIS_MODULE, mali_dev_name); + if (IS_ERR(device->mali_class)) + { + err = PTR_ERR(device->mali_class); + goto init_class_err; + } + mdev = device_create(device->mali_class, NULL, dev, NULL, mali_dev_name); + if (IS_ERR(mdev)) + { + err = PTR_ERR(mdev); + goto init_mdev_err; + } + + mali_debugfs_dir = debugfs_create_dir(mali_dev_name, NULL); + if(ERR_PTR(-ENODEV) == mali_debugfs_dir) { + /* Debugfs not supported. */ + mali_debugfs_dir = NULL; + } else { + if(NULL != mali_debugfs_dir) + { + /* Debugfs directory created successfully; create files now */ +#if MALI_STATE_TRACKING + debugfs_create_file("state_dump", 0400, mali_debugfs_dir, NULL, &mali_seq_internal_state_fops); +#endif + } + } +#endif /* MALI_LICENSE_IS_GPL */ + + /* Success! */ + return 0; + + /* Error handling */ +#if MALI_LICENSE_IS_GPL + if(NULL != mali_debugfs_dir) + { + debugfs_remove_recursive(mali_debugfs_dir); + } + device_destroy(device->mali_class, dev); +init_mdev_err: + class_destroy(device->mali_class); +init_class_err: +#endif + return err; +} + +int mali_sysfs_unregister(struct mali_dev *device, dev_t dev, const char *mali_dev_name) +{ +#if MALI_LICENSE_IS_GPL + if(NULL != mali_debugfs_dir) + { + debugfs_remove_recursive(mali_debugfs_dir); + } + device_destroy(device->mali_class, dev); + class_destroy(device->mali_class); +#endif + + return 0; +} + |