1 files changed, 0 insertions, 346 deletions
diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c
deleted file mode 100644
index 5be28e3295f3..000000000000
--- a/drivers/gpu/drm/drm_dp_aux_dev.c
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
- * Copyright © 2015 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
- * Authors:
- *    Rafael Antognolli <rafael.antognolli@intel.com>
- *
- */
-
-#include <linux/device.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched/signal.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/uio.h>
-
-#include <drm/drm_crtc.h>
-#include <drm/drm_dp_helper.h>
-#include <drm/drm_print.h>
-
-#include "drm_crtc_helper_internal.h"
-
-struct drm_dp_aux_dev {
-	unsigned index;
-	struct drm_dp_aux *aux;
-	struct device *dev;
-	struct kref refcount;
-	atomic_t usecount;
-};
-
-#define DRM_AUX_MINORS	256
-#define AUX_MAX_OFFSET	(1 << 20)
-static DEFINE_IDR(aux_idr);
-static DEFINE_MUTEX(aux_idr_mutex);
-static struct class *drm_dp_aux_dev_class;
-static int drm_dev_major = -1;
-
-static struct drm_dp_aux_dev *drm_dp_aux_dev_get_by_minor(unsigned index)
-{
-	struct drm_dp_aux_dev *aux_dev = NULL;
-
-	mutex_lock(&aux_idr_mutex);
-	aux_dev = idr_find(&aux_idr, index);
-	if (!kref_get_unless_zero(&aux_dev->refcount))
-		aux_dev = NULL;
-	mutex_unlock(&aux_idr_mutex);
-
-	return aux_dev;
-}
-
-static struct drm_dp_aux_dev *alloc_drm_dp_aux_dev(struct drm_dp_aux *aux)
-{
-	struct drm_dp_aux_dev *aux_dev;
-	int index;
-
-	aux_dev = kzalloc(sizeof(*aux_dev), GFP_KERNEL);
-	if (!aux_dev)
-		return ERR_PTR(-ENOMEM);
-	aux_dev->aux = aux;
-	atomic_set(&aux_dev->usecount, 1);
-	kref_init(&aux_dev->refcount);
-
-	mutex_lock(&aux_idr_mutex);
-	index = idr_alloc_cyclic(&aux_idr, aux_dev, 0, DRM_AUX_MINORS,
-				 GFP_KERNEL);
-	mutex_unlock(&aux_idr_mutex);
-	if (index < 0) {
-		kfree(aux_dev);
-		return ERR_PTR(index);
-	}
-	aux_dev->index = index;
-
-	return aux_dev;
-}
-
-static void release_drm_dp_aux_dev(struct kref *ref)
-{
-	struct drm_dp_aux_dev *aux_dev =
-		container_of(ref, struct drm_dp_aux_dev, refcount);
-
-	kfree(aux_dev);
-}
-
-static ssize_t name_show(struct device *dev,
-			 struct device_attribute *attr, char *buf)
-{
-	ssize_t res;
-	struct drm_dp_aux_dev *aux_dev =
-		drm_dp_aux_dev_get_by_minor(MINOR(dev->devt));
-
-	if (!aux_dev)
-		return -ENODEV;
-
-	res = sprintf(buf, "%s\n", aux_dev->aux->name);
-	kref_put(&aux_dev->refcount, release_drm_dp_aux_dev);
-
-	return res;
-}
-static DEVICE_ATTR_RO(name);
-
-static struct attribute *drm_dp_aux_attrs[] = {
-	&dev_attr_name.attr,
-	NULL,
-};
-ATTRIBUTE_GROUPS(drm_dp_aux);
-
-static int auxdev_open(struct inode *inode, struct file *file)
-{
-	unsigned int minor = iminor(inode);
-	struct drm_dp_aux_dev *aux_dev;
-
-	aux_dev = drm_dp_aux_dev_get_by_minor(minor);
-	if (!aux_dev)
-		return -ENODEV;
-
-	file->private_data = aux_dev;
-	return 0;
-}
-
-static loff_t auxdev_llseek(struct file *file, loff_t offset, int whence)
-{
-	return fixed_size_llseek(file, offset, whence, AUX_MAX_OFFSET);
-}
-
-static ssize_t auxdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
-{
-	struct drm_dp_aux_dev *aux_dev = iocb->ki_filp->private_data;
-	loff_t pos = iocb->ki_pos;
-	ssize_t res = 0;
-
-	if (!atomic_inc_not_zero(&aux_dev->usecount))
-		return -ENODEV;
-
-	iov_iter_truncate(to, AUX_MAX_OFFSET - pos);
-
-	while (iov_iter_count(to)) {
-		uint8_t buf[DP_AUX_MAX_PAYLOAD_BYTES];
-		ssize_t todo = min(iov_iter_count(to), sizeof(buf));
-
-		if (signal_pending(current)) {
-			res = -ERESTARTSYS;
-			break;
-		}
-
-		res = drm_dp_dpcd_read(aux_dev->aux, pos, buf, todo);
-		if (res <= 0)
-			break;
-
-		if (copy_to_iter(buf, res, to) != res) {
-			res = -EFAULT;
-			break;
-		}
-
-		pos += res;
-	}
-
-	if (pos != iocb->ki_pos)
-		res = pos - iocb->ki_pos;
-	iocb->ki_pos = pos;
-
-	if (atomic_dec_and_test(&aux_dev->usecount))
-		wake_up_var(&aux_dev->usecount);
-
-	return res;
-}
-
-static ssize_t auxdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
-{
-	struct drm_dp_aux_dev *aux_dev = iocb->ki_filp->private_data;
-	loff_t pos = iocb->ki_pos;
-	ssize_t res = 0;
-
-	if (!atomic_inc_not_zero(&aux_dev->usecount))
-		return -ENODEV;
-
-	iov_iter_truncate(from, AUX_MAX_OFFSET - pos);
-
-	while (iov_iter_count(from)) {
-		uint8_t buf[DP_AUX_MAX_PAYLOAD_BYTES];
-		ssize_t todo = min(iov_iter_count(from), sizeof(buf));
-
-		if (signal_pending(current)) {
-			res = -ERESTARTSYS;
-			break;
-		}
-
-		if (!copy_from_iter_full(buf, todo, from)) {
-			res = -EFAULT;
-			break;
-		}
-
-		res = drm_dp_dpcd_write(aux_dev->aux, pos, buf, todo);
-		if (res <= 0)
-			break;
-
-		pos += res;
-	}
-
-	if (pos != iocb->ki_pos)
-		res = pos - iocb->ki_pos;
-	iocb->ki_pos = pos;
-
-	if (atomic_dec_and_test(&aux_dev->usecount))
-		wake_up_var(&aux_dev->usecount);
-
-	return res;
-}
-
-static int auxdev_release(struct inode *inode, struct file *file)
-{
-	struct drm_dp_aux_dev *aux_dev = file->private_data;
-
-	kref_put(&aux_dev->refcount, release_drm_dp_aux_dev);
-	return 0;
-}
-
-static const struct file_operations auxdev_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= auxdev_llseek,
-	.read_iter	= auxdev_read_iter,
-	.write_iter	= auxdev_write_iter,
-	.open		= auxdev_open,
-	.release	= auxdev_release,
-};
-
-#define to_auxdev(d) container_of(d, struct drm_dp_aux_dev, aux)
-
-static struct drm_dp_aux_dev *drm_dp_aux_dev_get_by_aux(struct drm_dp_aux *aux)
-{
-	struct drm_dp_aux_dev *iter, *aux_dev = NULL;
-	int id;
-
-	/* don't increase kref count here because this function should only be
-	 * used by drm_dp_aux_unregister_devnode. Thus, it will always have at
-	 * least one reference - the one that drm_dp_aux_register_devnode
-	 * created
-	 */
-	mutex_lock(&aux_idr_mutex);
-	idr_for_each_entry(&aux_idr, iter, id) {
-		if (iter->aux == aux) {
-			aux_dev = iter;
-			break;
-		}
-	}
-	mutex_unlock(&aux_idr_mutex);
-	return aux_dev;
-}
-
-void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
-{
-	struct drm_dp_aux_dev *aux_dev;
-	unsigned int minor;
-
-	aux_dev = drm_dp_aux_dev_get_by_aux(aux);
-	if (!aux_dev) /* attach must have failed */
-		return;
-
-	mutex_lock(&aux_idr_mutex);
-	idr_remove(&aux_idr, aux_dev->index);
-	mutex_unlock(&aux_idr_mutex);
-
-	atomic_dec(&aux_dev->usecount);
-	wait_var_event(&aux_dev->usecount, !atomic_read(&aux_dev->usecount));
-
-	minor = aux_dev->index;
-	if (aux_dev->dev)
-		device_destroy(drm_dp_aux_dev_class,
-			       MKDEV(drm_dev_major, minor));
-
-	DRM_DEBUG("drm_dp_aux_dev: aux [%s] unregistering\n", aux->name);
-	kref_put(&aux_dev->refcount, release_drm_dp_aux_dev);
-}
-
-int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
-{
-	struct drm_dp_aux_dev *aux_dev;
-	int res;
-
-	aux_dev = alloc_drm_dp_aux_dev(aux);
-	if (IS_ERR(aux_dev))
-		return PTR_ERR(aux_dev);
-
-	aux_dev->dev = device_create(drm_dp_aux_dev_class, aux->dev,
-				     MKDEV(drm_dev_major, aux_dev->index), NULL,
-				     "drm_dp_aux%d", aux_dev->index);
-	if (IS_ERR(aux_dev->dev)) {
-		res = PTR_ERR(aux_dev->dev);
-		aux_dev->dev = NULL;
-		goto error;
-	}
-
-	DRM_DEBUG("drm_dp_aux_dev: aux [%s] registered as minor %d\n",
-		  aux->name, aux_dev->index);
-	return 0;
-error:
-	drm_dp_aux_unregister_devnode(aux);
-	return res;
-}
-
-int drm_dp_aux_dev_init(void)
-{
-	int res;
-
-	drm_dp_aux_dev_class = class_create(THIS_MODULE, "drm_dp_aux_dev");
-	if (IS_ERR(drm_dp_aux_dev_class)) {
-		return PTR_ERR(drm_dp_aux_dev_class);
-	}
-	drm_dp_aux_dev_class->dev_groups = drm_dp_aux_groups;
-
-	res = register_chrdev(0, "aux", &auxdev_fops);
-	if (res < 0)
-		goto out;
-	drm_dev_major = res;
-
-	return 0;
-out:
-	class_destroy(drm_dp_aux_dev_class);
-	return res;
-}
-
-void drm_dp_aux_dev_exit(void)
-{
-	unregister_chrdev(drm_dev_major, "aux");
-	class_destroy(drm_dp_aux_dev_class);
-}