1 files changed, 0 insertions, 326 deletions
diff --git a/drivers/media/v4l2-core/videobuf-vmalloc.c b/drivers/media/v4l2-core/videobuf-vmalloc.c
deleted file mode 100644
index 85c7090606d6..000000000000
--- a/drivers/media/v4l2-core/videobuf-vmalloc.c
+++ /dev/null
@@ -1,326 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * helper functions for vmalloc video4linux capture buffers
- *
- * The functions expect the hardware being able to scatter gather
- * (i.e. the buffers are not linear in physical memory, but fragmented
- * into PAGE_SIZE chunks).  They also assume the driver does not need
- * to touch the video data.
- *
- * (c) 2007 Mauro Carvalho Chehab <mchehab@kernel.org>
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pgtable.h>
-
-#include <linux/pci.h>
-#include <linux/vmalloc.h>
-#include <linux/pagemap.h>
-#include <asm/page.h>
-
-#include <media/videobuf-vmalloc.h>
-
-#define MAGIC_DMABUF   0x17760309
-#define MAGIC_VMAL_MEM 0x18221223
-
-#define MAGIC_CHECK(is, should)						\
-	if (unlikely((is) != (should))) {				\
-		printk(KERN_ERR "magic mismatch: %x (expected %x)\n",	\
-				is, should);				\
-		BUG();							\
-	}
-
-static int debug;
-module_param(debug, int, 0644);
-
-MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers");
-MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
-MODULE_LICENSE("GPL");
-
-#define dprintk(level, fmt, arg...)					\
-	if (debug >= level)						\
-		printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg)
-
-
-/***************************************************************************/
-
-static void videobuf_vm_open(struct vm_area_struct *vma)
-{
-	struct videobuf_mapping *map = vma->vm_private_data;
-
-	dprintk(2, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", map,
-		map->count, vma->vm_start, vma->vm_end);
-
-	map->count++;
-}
-
-static void videobuf_vm_close(struct vm_area_struct *vma)
-{
-	struct videobuf_mapping *map = vma->vm_private_data;
-	struct videobuf_queue *q = map->q;
-	int i;
-
-	dprintk(2, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", map,
-		map->count, vma->vm_start, vma->vm_end);
-
-	map->count--;
-	if (0 == map->count) {
-		struct videobuf_vmalloc_memory *mem;
-
-		dprintk(1, "munmap %p q=%p\n", map, q);
-		videobuf_queue_lock(q);
-
-		/* We need first to cancel streams, before unmapping */
-		if (q->streaming)
-			videobuf_queue_cancel(q);
-
-		for (i = 0; i < VIDEO_MAX_FRAME; i++) {
-			if (NULL == q->bufs[i])
-				continue;
-
-			if (q->bufs[i]->map != map)
-				continue;
-
-			mem = q->bufs[i]->priv;
-			if (mem) {
-				/* This callback is called only if kernel has
-				   allocated memory and this memory is mmapped.
-				   In this case, memory should be freed,
-				   in order to do memory unmap.
-				 */
-
-				MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
-
-				/* vfree is not atomic - can't be
-				   called with IRQ's disabled
-				 */
-				dprintk(1, "%s: buf[%d] freeing (%p)\n",
-					__func__, i, mem->vaddr);
-
-				vfree(mem->vaddr);
-				mem->vaddr = NULL;
-			}
-
-			q->bufs[i]->map   = NULL;
-			q->bufs[i]->baddr = 0;
-		}
-
-		kfree(map);
-
-		videobuf_queue_unlock(q);
-	}
-
-	return;
-}
-
-static const struct vm_operations_struct videobuf_vm_ops = {
-	.open     = videobuf_vm_open,
-	.close    = videobuf_vm_close,
-};
-
-/* ---------------------------------------------------------------------
- * vmalloc handlers for the generic methods
- */
-
-/* Allocated area consists on 3 parts:
-	struct video_buffer
-	struct <driver>_buffer (cx88_buffer, saa7134_buf, ...)
-	struct videobuf_dma_sg_memory
- */
-
-static struct videobuf_buffer *__videobuf_alloc_vb(size_t size)
-{
-	struct videobuf_vmalloc_memory *mem;
-	struct videobuf_buffer *vb;
-
-	vb = kzalloc(size + sizeof(*mem), GFP_KERNEL);
-	if (!vb)
-		return vb;
-
-	mem = vb->priv = ((char *)vb) + size;
-	mem->magic = MAGIC_VMAL_MEM;
-
-	dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
-		__func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb),
-		mem, (long)sizeof(*mem));
-
-	return vb;
-}
-
-static int __videobuf_iolock(struct videobuf_queue *q,
-			     struct videobuf_buffer *vb,
-			     struct v4l2_framebuffer *fbuf)
-{
-	struct videobuf_vmalloc_memory *mem = vb->priv;
-	int pages;
-
-	BUG_ON(!mem);
-
-	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
-
-	switch (vb->memory) {
-	case V4L2_MEMORY_MMAP:
-		dprintk(1, "%s memory method MMAP\n", __func__);
-
-		/* All handling should be done by __videobuf_mmap_mapper() */
-		if (!mem->vaddr) {
-			printk(KERN_ERR "memory is not allocated/mmapped.\n");
-			return -EINVAL;
-		}
-		break;
-	case V4L2_MEMORY_USERPTR:
-		pages = PAGE_ALIGN(vb->size);
-
-		dprintk(1, "%s memory method USERPTR\n", __func__);
-
-		if (vb->baddr) {
-			printk(KERN_ERR "USERPTR is currently not supported\n");
-			return -EINVAL;
-		}
-
-		/* The only USERPTR currently supported is the one needed for
-		 * read() method.
-		 */
-
-		mem->vaddr = vmalloc_user(pages);
-		if (!mem->vaddr) {
-			printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
-			return -ENOMEM;
-		}
-		dprintk(1, "vmalloc is at addr %p (%d pages)\n",
-			mem->vaddr, pages);
-		break;
-	case V4L2_MEMORY_OVERLAY:
-	default:
-		dprintk(1, "%s memory method OVERLAY/unknown\n", __func__);
-
-		/* Currently, doesn't support V4L2_MEMORY_OVERLAY */
-		printk(KERN_ERR "Memory method currently unsupported.\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int __videobuf_mmap_mapper(struct videobuf_queue *q,
-				  struct videobuf_buffer *buf,
-				  struct vm_area_struct *vma)
-{
-	struct videobuf_vmalloc_memory *mem;
-	struct videobuf_mapping *map;
-	int retval, pages;
-
-	dprintk(1, "%s\n", __func__);
-
-	/* create mapping + update buffer list */
-	map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
-	if (NULL == map)
-		return -ENOMEM;
-
-	buf->map = map;
-	map->q     = q;
-
-	buf->baddr = vma->vm_start;
-
-	mem = buf->priv;
-	BUG_ON(!mem);
-	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
-
-	pages = PAGE_ALIGN(vma->vm_end - vma->vm_start);
-	mem->vaddr = vmalloc_user(pages);
-	if (!mem->vaddr) {
-		printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
-		goto error;
-	}
-	dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vaddr, pages);
-
-	/* Try to remap memory */
-	retval = remap_vmalloc_range(vma, mem->vaddr, 0);
-	if (retval < 0) {
-		printk(KERN_ERR "mmap: remap failed with error %d. ", retval);
-		vfree(mem->vaddr);
-		goto error;
-	}
-
-	vma->vm_ops          = &videobuf_vm_ops;
-	vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
-	vma->vm_private_data = map;
-
-	dprintk(1, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
-		map, q, vma->vm_start, vma->vm_end,
-		(long int)buf->bsize,
-		vma->vm_pgoff, buf->i);
-
-	videobuf_vm_open(vma);
-
-	return 0;
-
-error:
-	mem = NULL;
-	kfree(map);
-	return -ENOMEM;
-}
-
-static struct videobuf_qtype_ops qops = {
-	.magic        = MAGIC_QTYPE_OPS,
-
-	.alloc_vb     = __videobuf_alloc_vb,
-	.iolock       = __videobuf_iolock,
-	.mmap_mapper  = __videobuf_mmap_mapper,
-	.vaddr        = videobuf_to_vmalloc,
-};
-
-void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
-			 const struct videobuf_queue_ops *ops,
-			 struct device *dev,
-			 spinlock_t *irqlock,
-			 enum v4l2_buf_type type,
-			 enum v4l2_field field,
-			 unsigned int msize,
-			 void *priv,
-			 struct mutex *ext_lock)
-{
-	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
-				 priv, &qops, ext_lock);
-}
-EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init);
-
-void *videobuf_to_vmalloc(struct videobuf_buffer *buf)
-{
-	struct videobuf_vmalloc_memory *mem = buf->priv;
-	BUG_ON(!mem);
-	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
-
-	return mem->vaddr;
-}
-EXPORT_SYMBOL_GPL(videobuf_to_vmalloc);
-
-void videobuf_vmalloc_free(struct videobuf_buffer *buf)
-{
-	struct videobuf_vmalloc_memory *mem = buf->priv;
-
-	/* mmapped memory can't be freed here, otherwise mmapped region
-	   would be released, while still needed. In this case, the memory
-	   release should happen inside videobuf_vm_close().
-	   So, it should free memory only if the memory were allocated for
-	   read() operation.
-	 */
-	if ((buf->memory != V4L2_MEMORY_USERPTR) || buf->baddr)
-		return;
-
-	if (!mem)
-		return;
-
-	MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
-
-	vfree(mem->vaddr);
-	mem->vaddr = NULL;
-
-	return;
-}
-EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);
-