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drm/vgem: Drop vgem_drm_gem_mmap

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It's duplicating (without using some of the helpers) drm_gem_mmap with
the addition that it can redirect to drm-buf mmap support. But prime
import/export was dropped in

commit 990ed27207
Author: Rob Clark <robdclark@gmail.com>
Date:   Thu May 21 11:58:30 2015 -0400

    drm/vgem: drop DRIVER_PRIME (v2)

for now, so this is dead code. And since I want to rework the locking
for drm_gem_mmap it seems simpler to de-dupe this code for now and
then start over with the reworked one again, if we want to resurrect
this all indeed.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://mid.gmane.org/1444894601-5200-8-git-send-email-daniel.vetter@ffwll.ch
Acked-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2015-10-15 09:36:23 +02:00
parent 3c67d839b3
commit 3d57b42cab
1 changed files with 1 additions and 54 deletions
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55
drivers/gpu/drm/vgem/vgem_drv.c
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@ -235,66 +235,13 @@ unlock:
return ret;
}
int vgem_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *priv = filp->private_data;
struct drm_device *dev = priv->minor->dev;
struct drm_vma_offset_node *node;
struct drm_gem_object *obj;
struct drm_vgem_gem_object *vgem_obj;
int ret = 0;
mutex_lock(&dev->struct_mutex);
node = drm_vma_offset_exact_lookup(dev->vma_offset_manager,
vma->vm_pgoff,
vma_pages(vma));
if (!node) {
ret = -EINVAL;
goto out_unlock;
} else if (!drm_vma_node_is_allowed(node, filp)) {
ret = -EACCES;
goto out_unlock;
}
obj = container_of(node, struct drm_gem_object, vma_node);
vgem_obj = to_vgem_bo(obj);
if (obj->dma_buf && vgem_obj->use_dma_buf) {
ret = dma_buf_mmap(obj->dma_buf, vma, 0);
goto out_unlock;
}
if (!obj->dev->driver->gem_vm_ops) {
ret = -EINVAL;
goto out_unlock;
}
vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
vma->vm_ops = obj->dev->driver->gem_vm_ops;
vma->vm_private_data = vgem_obj;
vma->vm_page_prot =
pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
mutex_unlock(&dev->struct_mutex);
drm_gem_vm_open(vma);
return ret;
out_unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
static struct drm_ioctl_desc vgem_ioctls[] = {
};
static const struct file_operations vgem_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.mmap = vgem_drm_gem_mmap,
.mmap = drm_gem_mmap,
.poll = drm_poll,
.read = drm_read,
.unlocked_ioctl = drm_ioctl,