1 files changed, 0 insertions, 269 deletions
diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
deleted file mode 100644
index 9a41b73e54b4..000000000000
--- a/drivers/dma-buf/dma-heap.c
+++ /dev/null
@@ -1,269 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Framework for userspace DMA-BUF allocations
- *
- * Copyright (C) 2011 Google, Inc.
- * Copyright (C) 2019 Linaro Ltd.
- */
-
-#include <linux/cdev.h>
-#include <linux/debugfs.h>
-#include <linux/device.h>
-#include <linux/dma-buf.h>
-#include <linux/err.h>
-#include <linux/xarray.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/syscalls.h>
-#include <linux/dma-heap.h>
-#include <uapi/linux/dma-heap.h>
-
-#define DEVNAME "dma_heap"
-
-#define NUM_HEAP_MINORS 128
-
-/**
- * struct dma_heap - represents a dmabuf heap in the system
- * @name:		used for debugging/device-node name
- * @ops:		ops struct for this heap
- * @minor		minor number of this heap device
- * @heap_devt		heap device node
- * @heap_cdev		heap char device
- *
- * Represents a heap of memory from which buffers can be made.
- */
-struct dma_heap {
-	const char *name;
-	const struct dma_heap_ops *ops;
-	void *priv;
-	unsigned int minor;
-	dev_t heap_devt;
-	struct list_head list;
-	struct cdev heap_cdev;
-};
-
-static LIST_HEAD(heap_list);
-static DEFINE_MUTEX(heap_list_lock);
-static dev_t dma_heap_devt;
-static struct class *dma_heap_class;
-static DEFINE_XARRAY_ALLOC(dma_heap_minors);
-
-static int dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,
-				 unsigned int fd_flags,
-				 unsigned int heap_flags)
-{
-	/*
-	 * Allocations from all heaps have to begin
-	 * and end on page boundaries.
-	 */
-	len = PAGE_ALIGN(len);
-	if (!len)
-		return -EINVAL;
-
-	return heap->ops->allocate(heap, len, fd_flags, heap_flags);
-}
-
-static int dma_heap_open(struct inode *inode, struct file *file)
-{
-	struct dma_heap *heap;
-
-	heap = xa_load(&dma_heap_minors, iminor(inode));
-	if (!heap) {
-		pr_err("dma_heap: minor %d unknown.\n", iminor(inode));
-		return -ENODEV;
-	}
-
-	/* instance data as context */
-	file->private_data = heap;
-	nonseekable_open(inode, file);
-
-	return 0;
-}
-
-static long dma_heap_ioctl_allocate(struct file *file, unsigned long arg)
-{
-	struct dma_heap_allocation_data heap_allocation;
-	struct dma_heap *heap = file->private_data;
-	int fd;
-
-	if (copy_from_user(&heap_allocation, (void __user *)arg,
-			   sizeof(heap_allocation)))
-		return -EFAULT;
-
-	if (heap_allocation.fd ||
-	    heap_allocation.reserved0 ||
-	    heap_allocation.reserved1) {
-		pr_warn_once("dma_heap: ioctl data not valid\n");
-		return -EINVAL;
-	}
-
-	if (heap_allocation.fd_flags & ~DMA_HEAP_VALID_FD_FLAGS) {
-		pr_warn_once("dma_heap: fd_flags has invalid or unsupported flags set\n");
-		return -EINVAL;
-	}
-
-	if (heap_allocation.heap_flags & ~DMA_HEAP_VALID_HEAP_FLAGS) {
-		pr_warn_once("dma_heap: heap flags has invalid or unsupported flags set\n");
-		return -EINVAL;
-	}
-
-	fd = dma_heap_buffer_alloc(heap, heap_allocation.len,
-				   heap_allocation.fd_flags,
-				   heap_allocation.heap_flags);
-	if (fd < 0)
-		return fd;
-
-	heap_allocation.fd = fd;
-
-	if (copy_to_user((void __user *)arg, &heap_allocation,
-			 sizeof(heap_allocation))) {
-		ksys_close(fd);
-		return -EFAULT;
-	}
-
-	return 0;
-}
-
-static long dma_heap_ioctl(struct file *file, unsigned int cmd,
-			   unsigned long arg)
-{
-	int ret = 0;
-
-	switch (cmd) {
-	case DMA_HEAP_IOC_ALLOC:
-		ret = dma_heap_ioctl_allocate(file, arg);
-		break;
-	default:
-		return -ENOTTY;
-	}
-
-	return ret;
-}
-
-static const struct file_operations dma_heap_fops = {
-	.owner          = THIS_MODULE,
-	.open		= dma_heap_open,
-	.unlocked_ioctl = dma_heap_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl	= dma_heap_ioctl,
-#endif
-};
-
-/**
- * dma_heap_get_drvdata() - get per-subdriver data for the heap
- * @heap: DMA-Heap to retrieve private data for
- *
- * Returns:
- * The per-subdriver data for the heap.
- */
-void *dma_heap_get_drvdata(struct dma_heap *heap)
-{
-	return heap->priv;
-}
-
-struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
-{
-	struct dma_heap *heap, *h, *err_ret;
-	struct device *dev_ret;
-	int ret;
-
-	if (!exp_info->name || !strcmp(exp_info->name, "")) {
-		pr_err("dma_heap: Cannot add heap without a name\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	if (!exp_info->ops || !exp_info->ops->allocate) {
-		pr_err("dma_heap: Cannot add heap with invalid ops struct\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	/* check the name is unique */
-	mutex_lock(&heap_list_lock);
-	list_for_each_entry(h, &heap_list, list) {
-		if (!strcmp(h->name, exp_info->name)) {
-			mutex_unlock(&heap_list_lock);
-			pr_err("dma_heap: Already registered heap named %s\n",
-			       exp_info->name);
-			return ERR_PTR(-EINVAL);
-		}
-	}
-	mutex_unlock(&heap_list_lock);
-
-	heap = kzalloc(sizeof(*heap), GFP_KERNEL);
-	if (!heap)
-		return ERR_PTR(-ENOMEM);
-
-	heap->name = exp_info->name;
-	heap->ops = exp_info->ops;
-	heap->priv = exp_info->priv;
-
-	/* Find unused minor number */
-	ret = xa_alloc(&dma_heap_minors, &heap->minor, heap,
-		       XA_LIMIT(0, NUM_HEAP_MINORS - 1), GFP_KERNEL);
-	if (ret < 0) {
-		pr_err("dma_heap: Unable to get minor number for heap\n");
-		err_ret = ERR_PTR(ret);
-		goto err0;
-	}
-
-	/* Create device */
-	heap->heap_devt = MKDEV(MAJOR(dma_heap_devt), heap->minor);
-
-	cdev_init(&heap->heap_cdev, &dma_heap_fops);
-	ret = cdev_add(&heap->heap_cdev, heap->heap_devt, 1);
-	if (ret < 0) {
-		pr_err("dma_heap: Unable to add char device\n");
-		err_ret = ERR_PTR(ret);
-		goto err1;
-	}
-
-	dev_ret = device_create(dma_heap_class,
-				NULL,
-				heap->heap_devt,
-				NULL,
-				heap->name);
-	if (IS_ERR(dev_ret)) {
-		pr_err("dma_heap: Unable to create device\n");
-		err_ret = ERR_CAST(dev_ret);
-		goto err2;
-	}
-	/* Add heap to the list */
-	mutex_lock(&heap_list_lock);
-	list_add(&heap->list, &heap_list);
-	mutex_unlock(&heap_list_lock);
-
-	return heap;
-
-err2:
-	cdev_del(&heap->heap_cdev);
-err1:
-	xa_erase(&dma_heap_minors, heap->minor);
-err0:
-	kfree(heap);
-	return err_ret;
-}
-
-static char *dma_heap_devnode(struct device *dev, umode_t *mode)
-{
-	return kasprintf(GFP_KERNEL, "dma_heap/%s", dev_name(dev));
-}
-
-static int dma_heap_init(void)
-{
-	int ret;
-
-	ret = alloc_chrdev_region(&dma_heap_devt, 0, NUM_HEAP_MINORS, DEVNAME);
-	if (ret)
-		return ret;
-
-	dma_heap_class = class_create(THIS_MODULE, DEVNAME);
-	if (IS_ERR(dma_heap_class)) {
-		unregister_chrdev_region(dma_heap_devt, NUM_HEAP_MINORS);
-		return PTR_ERR(dma_heap_class);
-	}
-	dma_heap_class->devnode = dma_heap_devnode;
-
-	return 0;
-}
-subsys_initcall(dma_heap_init);