media: remove the old videobuf framework

The last driver that still used this old framework has been converted
to the videobuf2 framework. So it is now time to delete the old videobuf
code.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>

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);
-