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drm/shmem: switch shmem helper to &drm_gem_object_funcs.mmap

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Switch gem shmem helper to the new mmap() workflow,
from &gem_driver.fops.mmap to &drm_gem_object_funcs.mmap.

v2: Fix vm_flags and vm_page_prot handling.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20191016115203.20095-3-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2019-10-16 13:51:54 +02:00
parent c40069cb7b
commit 0be8958936
5 changed files with 15 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/gpu/drm/drm_gem_shmem_helper.c
View File

@ -32,7 +32,7 @@ static const struct drm_gem_object_funcs drm_gem_shmem_funcs = {
.get_sg_table = drm_gem_shmem_get_sg_table,
.vmap = drm_gem_shmem_vmap,
.vunmap = drm_gem_shmem_vunmap,
.vm_ops = &drm_gem_shmem_vm_ops,
.mmap = drm_gem_shmem_mmap,
};
/**
@ -505,39 +505,30 @@ static void drm_gem_shmem_vm_close(struct vm_area_struct *vma)
drm_gem_vm_close(vma);
}
const struct vm_operations_struct drm_gem_shmem_vm_ops = {
static const struct vm_operations_struct drm_gem_shmem_vm_ops = {
.fault = drm_gem_shmem_fault,
.open = drm_gem_shmem_vm_open,
.close = drm_gem_shmem_vm_close,
};
EXPORT_SYMBOL_GPL(drm_gem_shmem_vm_ops);
/**
* drm_gem_shmem_mmap - Memory-map a shmem GEM object
* @filp: File object
* @obj: gem object
* @vma: VMA for the area to be mapped
*
* This function implements an augmented version of the GEM DRM file mmap
* operation for shmem objects. Drivers which employ the shmem helpers should
* use this function as their &file_operations.mmap handler in the DRM device file's
* file_operations structure.
*
* Instead of directly referencing this function, drivers should use the
* DEFINE_DRM_GEM_SHMEM_FOPS() macro.
* use this function as their &drm_gem_object_funcs.mmap handler.
*
* Returns:
* 0 on success or a negative error code on failure.
*/
int drm_gem_shmem_mmap(struct file *filp, struct vm_area_struct *vma)
int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
{
struct drm_gem_shmem_object *shmem;
int ret;
ret = drm_gem_mmap(filp, vma);
if (ret)
return ret;
shmem = to_drm_gem_shmem_obj(vma->vm_private_data);
shmem = to_drm_gem_shmem_obj(obj);
ret = drm_gem_shmem_get_pages(shmem);
if (ret) {
@ -545,9 +536,10 @@ int drm_gem_shmem_mmap(struct file *filp, struct vm_area_struct *vma)
return ret;
}
/* VM_PFNMAP was set by drm_gem_mmap() */
vma->vm_flags &= ~VM_PFNMAP;
vma->vm_flags |= VM_MIXEDMAP;
vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
vma->vm_ops = &drm_gem_shmem_vm_ops;
/* Remove the fake offset */
vma->vm_pgoff -= drm_vma_node_start(&shmem->base.vma_node);

2
drivers/gpu/drm/panfrost/panfrost_gem.c
View File

@ -112,7 +112,7 @@ static const struct drm_gem_object_funcs panfrost_gem_funcs = {
.get_sg_table = drm_gem_shmem_get_sg_table,
.vmap = drm_gem_shmem_vmap,
.vunmap = drm_gem_shmem_vunmap,
.vm_ops = &drm_gem_shmem_vm_ops,
.mmap = drm_gem_shmem_mmap,
};
/**

2
drivers/gpu/drm/v3d/v3d_bo.c
View File

@ -58,7 +58,7 @@ static const struct drm_gem_object_funcs v3d_gem_funcs = {
.get_sg_table = drm_gem_shmem_get_sg_table,
.vmap = drm_gem_shmem_vmap,
.vunmap = drm_gem_shmem_vunmap,
.vm_ops = &drm_gem_shmem_vm_ops,
.mmap = drm_gem_shmem_mmap,
};
/* gem_create_object function for allocating a BO struct and doing

2
drivers/gpu/drm/virtio/virtgpu_object.c
View File

@ -86,7 +86,7 @@ static const struct drm_gem_object_funcs virtio_gpu_gem_funcs = {
.get_sg_table = drm_gem_shmem_get_sg_table,
.vmap = drm_gem_shmem_vmap,
.vunmap = drm_gem_shmem_vunmap,
.vm_ops = &drm_gem_shmem_vm_ops,
.mmap = &drm_gem_shmem_mmap,
};
struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,

6
include/drm/drm_gem_shmem_helper.h
View File

@ -111,7 +111,7 @@ struct drm_gem_shmem_object {
.poll = drm_poll,\
.read = drm_read,\
.llseek = noop_llseek,\
.mmap = drm_gem_shmem_mmap, \
.mmap = drm_gem_mmap, \
}
struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size);
@ -143,9 +143,7 @@ drm_gem_shmem_create_with_handle(struct drm_file *file_priv,
int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args);
int drm_gem_shmem_mmap(struct file *filp, struct vm_area_struct *vma);
extern const struct vm_operations_struct drm_gem_shmem_vm_ops;
int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent,
const struct drm_gem_object *obj);