static int ion_kernel_mapper_map_user(struct ion_mapper *mapper,
struct ion_buffer *buffer,
struct vm_area_struct *vma,
struct ion_mapping *mapping)
{
int ret;
switch (buffer->heap->type) {
case ION_HEAP_KMALLOC:
{
unsigned long pfn = __phys_to_pfn(virt_to_phys(buffer->priv));
ret = remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
break;
}
case ION_HEAP_VMALLOC:
ret = remap_vmalloc_range(vma, buffer->priv, vma->vm_pgoff);
break;
default:
pr_err("%s: attempting to map unsupported heap to userspace\n",
__func__);
return -EINVAL;
}
return ret;
}
static int vb2_vmalloc_mmap(void *buf_priv, struct vm_area_struct *vma)
{
struct vb2_vmalloc_buf *buf = buf_priv;
int ret;
if (!buf) {
pr_err("No memory to map\n");
return -EINVAL;
}
ret = remap_vmalloc_range(vma, buf->vaddr, 0);
if (ret) {
pr_err("Remapping vmalloc memory, error: %d\n", ret);
return ret;
}
/*
* Make sure that vm_areas for 2 buffers won't be merged together
*/
vma->vm_flags |= VM_DONTEXPAND;
/*
* Use common vm_area operations to track buffer refcount.
*/
vma->vm_private_data = &buf->handler;
vma->vm_ops = &vb2_common_vm_ops;
vma->vm_ops->open(vma);
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->start = vma->vm_start;
map->end = vma->vm_end;
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->vmalloc = vmalloc_user(pages);
if (!mem->vmalloc) {
printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
goto error;
}
dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vmalloc, pages);
/* Try to remap memory */
retval = remap_vmalloc_range(vma, mem->vmalloc, 0);
if (retval < 0) {
printk(KERN_ERR "mmap: remap failed with error %d. ", retval);
vfree(mem->vmalloc);
goto error;
}
vma->vm_ops = &videobuf_vm_ops;
vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
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;
}
/* runs when user space wants to mmap the file */
static int flowtab_mmap(struct file *filep, struct vm_area_struct *vma)
{
struct flowtab_info *info = filep->private_data;
if (remap_vmalloc_range(vma, info->map->pairs, 0)) {
pr_warning("remap_vmalloc_range failed\n");
return -EAGAIN;
}
return 0;
}
int ion_system_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
struct vm_area_struct *vma, unsigned long flags)
{
if (ION_IS_CACHED(flags))
return remap_vmalloc_range(vma, buffer->priv_virt,
vma->vm_pgoff);
else {
pr_err("%s: cannot map system heap uncached\n", __func__);
return -EINVAL;
}
}
static int ion_mm_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
struct vm_area_struct *vma)
{
int ret;
ion_mm_buffer_info* pBufferInfo = (ion_mm_buffer_info*) buffer->priv_virt;
ION_FUNC_ENTER;
if ((!pBufferInfo) || (!pBufferInfo->pVA))
{
printk("[ion_mm_heap_map_user]: Error. Invalid buffer.\n");
return -EFAULT;
}
ret = remap_vmalloc_range(vma, pBufferInfo->pVA, vma->vm_pgoff);
ION_FUNC_LEAVE;
return ret;
}
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 alloced/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);
#if 0
int rc;
/* Kernel userptr is used also by read() method. In this case,
there's no need to remap, since data will be copied to user
*/
if (!vb->baddr)
return 0;
/* FIXME: to properly support USERPTR, remap should occur.
The code below won't work, since mem->vma = NULL
*/
/* Try to remap memory */
rc = remap_vmalloc_range(mem->vma, (void *)vb->baddr, 0);
if (rc < 0) {
printk(KERN_ERR "mmap: remap failed with error %d", rc);
return -ENOMEM;
}
#endif
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_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__);
if (!mem->vaddr) {
printk(KERN_ERR "memory is not alloced/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;
}
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);
#if 0
int rc;
if (!vb->baddr)
return 0;
rc = remap_vmalloc_range(mem->vma, (void *)vb->baddr, 0);
if (rc < 0) {
printk(KERN_ERR "mmap: remap failed with error %d", rc);
return -ENOMEM;
}
#endif
break;
case V4L2_MEMORY_OVERLAY:
default:
dprintk(1, "%s memory method OVERLAY/unknown\n", __func__);
printk(KERN_ERR "Memory method currently unsupported.\n");
return -EINVAL;
}
return 0;
}
static int __videobuf_mmap_mapper(struct videobuf_queue *q,
struct vm_area_struct *vma)
{
struct videobuf_vmalloc_memory *mem;
struct videobuf_mapping *map;
unsigned int first;
int retval, pages;
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
dprintk(1, "%s\n", __func__);
if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
return -EINVAL;
/* look for first buffer to map */
for (first = 0; first < VIDEO_MAX_FRAME; first++) {
if (NULL == q->bufs[first])
continue;
if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
continue;
if (q->bufs[first]->boff == offset)
break;
}
if (VIDEO_MAX_FRAME == first) {
dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n",
(vma->vm_pgoff << PAGE_SHIFT));
return -EINVAL;
}
/* create mapping + update buffer list */
map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
if (NULL == map)
return -ENOMEM;
q->bufs[first]->map = map;
map->start = vma->vm_start;
map->end = vma->vm_end;
map->q = q;
q->bufs[first]->baddr = vma->vm_start;
mem = q->bufs[first]->priv;
BUG_ON(!mem);
MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
pages = PAGE_ALIGN(vma->vm_end - vma->vm_start);
mem->vmalloc = vmalloc_user(pages);
if (!mem->vmalloc) {
printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
goto error;
}
dprintk(1, "vmalloc is at addr %p (%d pages)\n",
mem->vmalloc, pages);
/* Try to remap memory */
retval = remap_vmalloc_range(vma, mem->vmalloc, 0);
if (retval < 0) {
printk(KERN_ERR "mmap: remap failed with error %d. ", retval);
vfree(mem->vmalloc);
goto error;
}
vma->vm_ops = &videobuf_vm_ops;
vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
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) q->bufs[first]->bsize,
vma->vm_pgoff, first);
videobuf_vm_open(vma);
return 0;
error:
mem = NULL;
kfree(map);
return -ENOMEM;
}
* maintenance necessary to support an uncached mapping
*/
BUG_ON(kaddr);
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
}
if (!kaddr) {
for (i = 0; i < nr_pages; i++) {
err = vm_insert_mixed(vma, vma->vm_start + (i << PAGE_SHIFT), page_array[i + start_off] >> PAGE_SHIFT);
WARN_ON(err);
if (err)
break;
}
} else {
/* vmalloc remaping is easy... */
err = remap_vmalloc_range(vma, kaddr, 0);
WARN_ON(err);
}
if (err) {
kfree(map);
goto out;
}
map->uaddr = (void *)vma->vm_start;
map->nr_pages = nr_pages;
map->page_off = start_off;
map->private = vma;
if ( (reg->flags & KBASE_REG_ZONE_MASK) == KBASE_REG_ZONE_TMEM)
{
int ion_system_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
struct vm_area_struct *vma)
{
return remap_vmalloc_range(vma, buffer->priv_virt, vma->vm_pgoff);
}