[PATCH v2 01/11] drm: add mmap() to drm_gem_object_funcs

[PATCH v2 01/11] drm: add mmap() to drm_gem_object_funcs

[Gerd Hoffmann]

drm_gem_object_funcs->vm_ops alone can't handle everything which needs
to be done for mmap(), tweaking vm_flags for example.  So add a new
mmap() callback to drm_gem_object_funcs where this code can go to.

Note that the vm_ops field is not used in case the mmap callback is
present, it is expected that the callback sets vma->vm_ops instead.

Also setting vm_flags and vm_page_prot is the job of the new callback.
so drivers have more control over these flags.

drm_gem_mmap_obj() will use the new callback for object specific mmap
setup.  With this in place the need for driver-speific fops->mmap
callbacks goes away, drm_gem_mmap can be hooked instead.

drm_gem_prime_mmap() will use the new callback too to just mmap gem
objects directly instead of jumping though loops to make
drm_gem_object_lookup() and fops->mmap work.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/drm/drm_gem.h       | 14 ++++++++++++++
 drivers/gpu/drm/drm_gem.c   | 27 ++++++++++++++++++---------
 drivers/gpu/drm/drm_prime.c |  9 +++++++++
 3 files changed, 41 insertions(+), 9 deletions(-)

diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index 6aaba14f5972..e71f75a2ab57 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -150,6 +150,20 @@ struct drm_gem_object_funcs {
 	 */
 	void (*vunmap)(struct drm_gem_object *obj, void *vaddr);
 
+	/**
+	 * @mmap:
+	 *
+	 * Handle mmap() of the gem object, setup vma accordingly.
+	 *
+	 * This callback is optional.
+	 *
+	 * The callback is used by by both drm_gem_mmap_obj() and
+	 * drm_gem_prime_mmap().  When @mmap is present @vm_ops is not
+	 * used, the @mmap callback must set vma->vm_ops instead.
+	 *
+	 */
+	int (*mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma);
+
 	/**
 	 * @vm_ops:
 	 *
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 6854f5867d51..56f42e0f2584 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1099,22 +1099,31 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
 		     struct vm_area_struct *vma)
 {
 	struct drm_device *dev = obj->dev;
+	int ret;
 
 	/* Check for valid size. */
 	if (obj_size < vma->vm_end - vma->vm_start)
 		return -EINVAL;
 
-	if (obj->funcs && obj->funcs->vm_ops)
-		vma->vm_ops = obj->funcs->vm_ops;
-	else if (dev->driver->gem_vm_ops)
-		vma->vm_ops = dev->driver->gem_vm_ops;
-	else
-		return -EINVAL;
+	if (obj->funcs && obj->funcs->mmap) {
+		ret = obj->funcs->mmap(obj, vma);
+		if (ret)
+			return ret;
+		WARN_ON(!(vma->vm_flags & VM_DONTEXPAND));
+	} else {
+		if (obj->funcs && obj->funcs->vm_ops)
+			vma->vm_ops = obj->funcs->vm_ops;
+		else if (dev->driver->gem_vm_ops)
+			vma->vm_ops = dev->driver->gem_vm_ops;
+		else
+			return -EINVAL;
+
+		vma->vm_flags |= VM_IO | VM_PFNMAP | 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_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
 	vma->vm_private_data = obj;
-	vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
-	vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
 
 	/* Take a ref for this mapping of the object, so that the fault
 	 * handler can dereference the mmap offset's pointer to the object.
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 0a2316e0e812..0814211b0f3f 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -713,6 +713,15 @@ int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
 	struct file *fil;
 	int ret;
 
+	if (obj->funcs && obj->funcs->mmap) {
+		ret = obj->funcs->mmap(obj, vma);
+		if (ret)
+			return ret;
+		vma->vm_private_data = obj;
+		drm_gem_object_get(obj);
+		return 0;
+	}
+
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	fil = kzalloc(sizeof(*fil), GFP_KERNEL);
 	if (!priv || !fil) {
-- 
2.18.1

[PATCH v2 02/11] drm/shmem: switch shmem helper to &drm_gem_object_funcs.mmap

[Gerd Hoffmann]

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>
---
 include/drm/drm_gem_shmem_helper.h      |  6 ++----
 drivers/gpu/drm/drm_gem_shmem_helper.c  | 28 +++++++++----------------
 drivers/gpu/drm/panfrost/panfrost_gem.c |  2 +-
 drivers/gpu/drm/v3d/v3d_bo.c            |  2 +-
 drivers/gpu/drm/virtio/virtgpu_object.c |  2 +-
 5 files changed, 15 insertions(+), 25 deletions(-)

diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index 01f514521687..d89f2116c8ab 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -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);
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index f5918707672f..a9a586630517 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -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);
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c
index acb07fe06580..deca0c30bbd4 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
@@ -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,
 };
 
 /**
diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c
index a22b75a3a533..edd299ab53d8 100644
--- a/drivers/gpu/drm/v3d/v3d_bo.c
+++ b/drivers/gpu/drm/v3d/v3d_bo.c
@@ -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
diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index 69a3d310ff70..017a9e0fc3bb 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -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,
-- 
2.18.1

Re: [PATCH v2 02/11] drm/shmem: switch shmem helper to &drm_gem_object_funcs.mmap

[Steven Price]

On 17/09/2019 10:23, Gerd Hoffmann wrote:
> 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>

> ---
>  include/drm/drm_gem_shmem_helper.h      |  6 ++----
>  drivers/gpu/drm/drm_gem_shmem_helper.c  | 28 +++++++++----------------
>  drivers/gpu/drm/panfrost/panfrost_gem.c |  2 +-
>  drivers/gpu/drm/v3d/v3d_bo.c            |  2 +-
>  drivers/gpu/drm/virtio/virtgpu_object.c |  2 +-
>  5 files changed, 15 insertions(+), 25 deletions(-)
> 
> diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
> index 01f514521687..d89f2116c8ab 100644
> --- a/include/drm/drm_gem_shmem_helper.h
> +++ b/include/drm/drm_gem_shmem_helper.h
> @@ -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);
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index f5918707672f..a9a586630517 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -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);
> diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c
> index acb07fe06580..deca0c30bbd4 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_gem.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
> @@ -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,
>  };
>  
>  /**
> diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c
> index a22b75a3a533..edd299ab53d8 100644
> --- a/drivers/gpu/drm/v3d/v3d_bo.c
> +++ b/drivers/gpu/drm/v3d/v3d_bo.c
> @@ -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
> diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
> index 69a3d310ff70..017a9e0fc3bb 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_object.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_object.c
> @@ -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,
> 

[PATCH v2 03/11] drm/shmem: drop VM_DONTDUMP

[Gerd Hoffmann]

Not obvious why this is needed.  According to Deniel Vetter this is most
likely a historic artefact dating back to the days where drm drivers
exposed hardware registers as mmap'able gem objects, to avoid dumping
touching those registers.  shmem gem objects surely don't need that ...

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/drm_gem_shmem_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index a9a586630517..6efedab15016 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -536,7 +536,7 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
 		return ret;
 	}
 
-	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
+	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
 	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;
-- 
2.18.1

Re: [PATCH v2 03/11] drm/shmem: drop VM_DONTDUMP

[Steven Price]

On 17/09/2019 10:23, Gerd Hoffmann wrote:
> Not obvious why this is needed.  According to Deniel Vetter this is most
> likely a historic artefact dating back to the days where drm drivers
> exposed hardware registers as mmap'able gem objects, to avoid dumping
> touching those registers.  shmem gem objects surely don't need that ...
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Reviewed-by: Steven Price <steven.price@arm.com>

> ---
>  drivers/gpu/drm/drm_gem_shmem_helper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index a9a586630517..6efedab15016 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -536,7 +536,7 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
>  		return ret;
>  	}
>  
> -	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
> +	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
>  	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;
> 

[PATCH v2 04/11] drm/shmem: drop VM_IO

[Gerd Hoffmann]

VM_IO is wrong here, shmem uses normal ram not io memory.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/drm_gem_shmem_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 6efedab15016..3bc69b1ffa7d 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -536,7 +536,7 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
 		return ret;
 	}
 
-	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
+	vma->vm_flags |= VM_MIXEDMAP | VM_DONTEXPAND;
 	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;
-- 
2.18.1

Re: [PATCH v2 04/11] drm/shmem: drop VM_IO

[Steven Price]

On 17/09/2019 10:23, Gerd Hoffmann wrote:
> VM_IO is wrong here, shmem uses normal ram not io memory.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Reviewed-by: Steven Price <steven.price@arm.com>

> ---
>  drivers/gpu/drm/drm_gem_shmem_helper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 6efedab15016..3bc69b1ffa7d 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -536,7 +536,7 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
>  		return ret;
>  	}
>  
> -	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
> +	vma->vm_flags |= VM_MIXEDMAP | VM_DONTEXPAND;
>  	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;
> 

[PATCH v2 05/11] drm/shmem: drop DEFINE_DRM_GEM_SHMEM_FOPS

[Gerd Hoffmann]

DEFINE_DRM_GEM_SHMEM_FOPS is identical
to DEFINE_DRM_GEM_FOPS now, drop it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 include/drm/drm_gem_shmem_helper.h      | 26 -------------------------
 drivers/gpu/drm/cirrus/cirrus.c         |  2 +-
 drivers/gpu/drm/panfrost/panfrost_drv.c |  2 +-
 drivers/gpu/drm/tiny/gm12u320.c         |  2 +-
 drivers/gpu/drm/v3d/v3d_drv.c           |  2 +-
 drivers/gpu/drm/virtio/virtgpu_drv.c    |  2 +-
 6 files changed, 5 insertions(+), 31 deletions(-)

diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index d89f2116c8ab..6748379a0b44 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -88,32 +88,6 @@ struct drm_gem_shmem_object {
 #define to_drm_gem_shmem_obj(obj) \
 	container_of(obj, struct drm_gem_shmem_object, base)
 
-/**
- * DEFINE_DRM_GEM_SHMEM_FOPS() - Macro to generate file operations for shmem drivers
- * @name: name for the generated structure
- *
- * This macro autogenerates a suitable &struct file_operations for shmem based
- * drivers, which can be assigned to &drm_driver.fops. Note that this structure
- * cannot be shared between drivers, because it contains a reference to the
- * current module using THIS_MODULE.
- *
- * Note that the declaration is already marked as static - if you need a
- * non-static version of this you're probably doing it wrong and will break the
- * THIS_MODULE reference by accident.
- */
-#define DEFINE_DRM_GEM_SHMEM_FOPS(name) \
-	static const struct file_operations name = {\
-		.owner		= THIS_MODULE,\
-		.open		= drm_open,\
-		.release	= drm_release,\
-		.unlocked_ioctl	= drm_ioctl,\
-		.compat_ioctl	= drm_compat_ioctl,\
-		.poll		= drm_poll,\
-		.read		= drm_read,\
-		.llseek		= noop_llseek,\
-		.mmap		= drm_gem_mmap, \
-	}
-
 struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size);
 void drm_gem_shmem_free_object(struct drm_gem_object *obj);
 
diff --git a/drivers/gpu/drm/cirrus/cirrus.c b/drivers/gpu/drm/cirrus/cirrus.c
index 89d9e6fdeb8c..7d08d067e1a4 100644
--- a/drivers/gpu/drm/cirrus/cirrus.c
+++ b/drivers/gpu/drm/cirrus/cirrus.c
@@ -510,7 +510,7 @@ static void cirrus_mode_config_init(struct cirrus_device *cirrus)
 
 /* ------------------------------------------------------------------ */
 
-DEFINE_DRM_GEM_SHMEM_FOPS(cirrus_fops);
+DEFINE_DRM_GEM_FOPS(cirrus_fops);
 
 static struct drm_driver cirrus_driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index d74442d71048..a78ce21594d7 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -470,7 +470,7 @@ static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 	PANFROST_IOCTL(MADVISE,		madvise,	DRM_RENDER_ALLOW),
 };
 
-DEFINE_DRM_GEM_SHMEM_FOPS(panfrost_drm_driver_fops);
+DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
 
 /*
  * Panfrost driver version:
diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c
index 03d0e2df6774..94fb1f593564 100644
--- a/drivers/gpu/drm/tiny/gm12u320.c
+++ b/drivers/gpu/drm/tiny/gm12u320.c
@@ -649,7 +649,7 @@ static void gm12u320_driver_release(struct drm_device *dev)
 	kfree(gm12u320);
 }
 
-DEFINE_DRM_GEM_SHMEM_FOPS(gm12u320_fops);
+DEFINE_DRM_GEM_FOPS(gm12u320_fops);
 
 static struct drm_driver gm12u320_drm_driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index 3506ae2723ae..03e4fbe1b92b 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -169,7 +169,7 @@ v3d_postclose(struct drm_device *dev, struct drm_file *file)
 	kfree(v3d_priv);
 }
 
-DEFINE_DRM_GEM_SHMEM_FOPS(v3d_drm_fops);
+DEFINE_DRM_GEM_FOPS(v3d_drm_fops);
 
 /* DRM_AUTH is required on SUBMIT_CL for now, while we don't have GMP
  * protection between clients.  Note that render nodes would be be
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c
index a5cb58754f7d..8dee698c90ff 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -184,7 +184,7 @@ MODULE_AUTHOR("Dave Airlie <airlied@redhat.com>");
 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 MODULE_AUTHOR("Alon Levy");
 
-DEFINE_DRM_GEM_SHMEM_FOPS(virtio_gpu_driver_fops);
+DEFINE_DRM_GEM_FOPS(virtio_gpu_driver_fops);
 
 static struct drm_driver driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_RENDER | DRIVER_ATOMIC,
-- 
2.18.1

[PATCH v2 06/11] drm/ttm: factor out ttm_bo_mmap_vma_setup

[Gerd Hoffmann]

Factor out ttm vma setup to a new function.  Reduces
code duplication a bit and allows to implement
&drm_gem_object_funcs.mmap in gem ttm helpers.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/drm/ttm/ttm_bo_api.h    |  8 ++++++
 drivers/gpu/drm/ttm/ttm_bo_vm.c | 47 ++++++++++++++++++---------------
 2 files changed, 33 insertions(+), 22 deletions(-)

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 43c4929a2171..88c652f49602 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -734,6 +734,14 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
 int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
 		struct ttm_bo_device *bdev);
 
+/**
+ * ttm_bo_mmap_vma_setup - initialize vma for ttm bo mmap
+ *
+ * @bo: The buffer object.
+ * @vma: vma as input from the mmap method.
+ */
+void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma);
+
 void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot);
 
 void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 4aa007edffb0..7c0e85c10e0e 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -426,6 +426,29 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
 	return bo;
 }
 
+void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma)
+{
+	vma->vm_ops = &ttm_bo_vm_ops;
+
+	/*
+	 * Note: We're transferring the bo reference to
+	 * vma->vm_private_data here.
+	 */
+
+	vma->vm_private_data = bo;
+
+	/*
+	 * We'd like to use VM_PFNMAP on shared mappings, where
+	 * (vma->vm_flags & VM_SHARED) != 0, for performance reasons,
+	 * but for some reason VM_PFNMAP + x86 PAT + write-combine is very
+	 * bad for performance. Until that has been sorted out, use
+	 * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719
+	 */
+	vma->vm_flags |= VM_MIXEDMAP;
+	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
+}
+EXPORT_SYMBOL(ttm_bo_mmap_vma_setup);
+
 int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
 		struct ttm_bo_device *bdev)
 {
@@ -449,24 +472,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
 	if (unlikely(ret != 0))
 		goto out_unref;
 
-	vma->vm_ops = &ttm_bo_vm_ops;
-
-	/*
-	 * Note: We're transferring the bo reference to
-	 * vma->vm_private_data here.
-	 */
-
-	vma->vm_private_data = bo;
-
-	/*
-	 * We'd like to use VM_PFNMAP on shared mappings, where
-	 * (vma->vm_flags & VM_SHARED) != 0, for performance reasons,
-	 * but for some reason VM_PFNMAP + x86 PAT + write-combine is very
-	 * bad for performance. Until that has been sorted out, use
-	 * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719
-	 */
-	vma->vm_flags |= VM_MIXEDMAP;
-	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
+	ttm_bo_mmap_vma_setup(bo, vma);
 	return 0;
 out_unref:
 	ttm_bo_put(bo);
@@ -481,10 +487,7 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo)
 
 	ttm_bo_get(bo);
 
-	vma->vm_ops = &ttm_bo_vm_ops;
-	vma->vm_private_data = bo;
-	vma->vm_flags |= VM_MIXEDMAP;
-	vma->vm_flags |= VM_IO | VM_DONTEXPAND;
+	ttm_bo_mmap_vma_setup(bo, vma);
 	return 0;
 }
 EXPORT_SYMBOL(ttm_fbdev_mmap);
-- 
2.18.1

[PATCH v2 07/11] drm/ttm: drop VM_DONTDUMP

[Gerd Hoffmann]

Not obvious why this is needed.  According to Deniel Vetter this is most
likely a historic artefact dating back to the days where drm drivers
exposed hardware registers as mmap'able gem objects, to avoid dumping
touching those registers.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/ttm/ttm_bo_vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 7c0e85c10e0e..4dc77a66aaf6 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -445,7 +445,7 @@ void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *
 	 * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719
 	 */
 	vma->vm_flags |= VM_MIXEDMAP;
-	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
+	vma->vm_flags |= VM_IO | VM_DONTEXPAND;
 }
 EXPORT_SYMBOL(ttm_bo_mmap_vma_setup);
 
-- 
2.18.1

Re: [PATCH v2 07/11] drm/ttm: drop VM_DONTDUMP

[Koenig, Christian]

Am 17.09.19 um 11:24 schrieb Gerd Hoffmann:
> Not obvious why this is needed.  According to Deniel Vetter this is most
> likely a historic artefact dating back to the days where drm drivers
> exposed hardware registers as mmap'able gem objects, to avoid dumping
> touching those registers.

Clearly a NAK.

We still have that and really don't want to try dumping any CPU 
inaccessible VRAM content even if it is mapped into the address space 
somewhere.

Regards,
Christian.

>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>   drivers/gpu/drm/ttm/ttm_bo_vm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> index 7c0e85c10e0e..4dc77a66aaf6 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> @@ -445,7 +445,7 @@ void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *
>   	 * VM_MIXEDMAP on all mappings. See freedesktop.org bug #75719
>   	 */
>   	vma->vm_flags |= VM_MIXEDMAP;
> -	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
> +	vma->vm_flags |= VM_IO | VM_DONTEXPAND;
>   }
>   EXPORT_SYMBOL(ttm_bo_mmap_vma_setup);
>   

Re: [PATCH v2 07/11] drm/ttm: drop VM_DONTDUMP

[Gerd Hoffmann]

On Tue, Sep 17, 2019 at 11:22:35AM +0000, Koenig, Christian wrote:
> Am 17.09.19 um 11:24 schrieb Gerd Hoffmann:
> > Not obvious why this is needed.  According to Deniel Vetter this is most
> > likely a historic artefact dating back to the days where drm drivers
> > exposed hardware registers as mmap'able gem objects, to avoid dumping
> > touching those registers.
> 
> Clearly a NAK.
> 
> We still have that and really don't want to try dumping any CPU 
> inaccessible VRAM content even if it is mapped into the address space 
> somewhere.

Thanks for the clarification, I'll drop the patch.

cheers,
  Gerd

[PATCH v2 08/11] drm/ttm: add drm_gem_ttm_mmap()

[Gerd Hoffmann]

Add helper function to mmap ttm bo's using &drm_gem_object_funcs.mmap().

Note that with this code path access verification is done by
drm_gem_mmap() (which calls drm_vma_node_is_allowed(()).
The &ttm_bo_driver.verify_access() callback is is not used.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/drm/drm_gem_ttm_helper.h     |  2 ++
 drivers/gpu/drm/drm_gem_ttm_helper.c | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h
index 6268f89c5a48..118cef76f84f 100644
--- a/include/drm/drm_gem_ttm_helper.h
+++ b/include/drm/drm_gem_ttm_helper.h
@@ -15,5 +15,7 @@
 
 void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
 			    const struct drm_gem_object *gem);
+int drm_gem_ttm_mmap(struct drm_gem_object *gem,
+		     struct vm_area_struct *vma);
 
 #endif
diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c
index 9a4bafcf20df..34ce6cf78b35 100644
--- a/drivers/gpu/drm/drm_gem_ttm_helper.c
+++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
@@ -52,5 +52,24 @@ void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
 }
 EXPORT_SYMBOL(drm_gem_ttm_print_info);
 
+/**
+ * drm_gem_ttm_mmap() - mmap &ttm_buffer_object
+ * @gem: GEM object.
+ * @vma: vm area.
+ *
+ * This function can be used as &drm_gem_object_funcs.mmap
+ * callback.
+ */
+int drm_gem_ttm_mmap(struct drm_gem_object *gem,
+		     struct vm_area_struct *vma)
+{
+	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
+
+	ttm_bo_get(bo);
+	ttm_bo_mmap_vma_setup(bo, vma);
+	return 0;
+}
+EXPORT_SYMBOL(drm_gem_ttm_mmap);
+
 MODULE_DESCRIPTION("DRM gem ttm helpers");
 MODULE_LICENSE("GPL");
-- 
2.18.1

[PATCH v2 09/11] drm/vram: switch vram helper to &drm_gem_object_funcs.mmap()

[Gerd Hoffmann]

Wire up the new drm_gem_ttm_mmap() helper function,
use generic drm_gem_mmap for &fops.mmap and
delete dead drm_vram_mm_file_operations_mmap().

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 include/drm/drm_gem_vram_helper.h     |  9 +------
 drivers/gpu/drm/drm_gem_vram_helper.c | 34 +--------------------------
 2 files changed, 2 insertions(+), 41 deletions(-)

diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
index 9aaef4f8c327..9d5526650291 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -180,13 +180,6 @@ struct drm_vram_mm *drm_vram_helper_alloc_mm(
 	struct drm_device *dev, uint64_t vram_base, size_t vram_size);
 void drm_vram_helper_release_mm(struct drm_device *dev);
 
-/*
- * Helpers for &struct file_operations
- */
-
-int drm_vram_mm_file_operations_mmap(
-	struct file *filp, struct vm_area_struct *vma);
-
 /**
  * define DRM_VRAM_MM_FILE_OPERATIONS - default callback functions for \
 	&struct file_operations
@@ -200,7 +193,7 @@ int drm_vram_mm_file_operations_mmap(
 	.poll		= drm_poll, \
 	.unlocked_ioctl = drm_ioctl, \
 	.compat_ioctl	= drm_compat_ioctl, \
-	.mmap		= drm_vram_mm_file_operations_mmap, \
+	.mmap		= drm_gem_mmap, \
 	.open		= drm_open, \
 	.release	= drm_release \
 
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index 7bee80c6b6e8..e100b97ea6e3 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -681,6 +681,7 @@ static const struct drm_gem_object_funcs drm_gem_vram_object_funcs = {
 	.unpin	= drm_gem_vram_object_unpin,
 	.vmap	= drm_gem_vram_object_vmap,
 	.vunmap	= drm_gem_vram_object_vunmap,
+	.mmap   = drm_gem_ttm_mmap,
 	.print_info = drm_gem_ttm_print_info,
 };
 
@@ -915,12 +916,6 @@ static void drm_vram_mm_cleanup(struct drm_vram_mm *vmm)
 	ttm_bo_device_release(&vmm->bdev);
 }
 
-static int drm_vram_mm_mmap(struct file *filp, struct vm_area_struct *vma,
-			    struct drm_vram_mm *vmm)
-{
-	return ttm_bo_mmap(filp, vma, &vmm->bdev);
-}
-
 /*
  * Helpers for integration with struct drm_device
  */
@@ -976,30 +971,3 @@ void drm_vram_helper_release_mm(struct drm_device *dev)
 	dev->vram_mm = NULL;
 }
 EXPORT_SYMBOL(drm_vram_helper_release_mm);
-
-/*
- * Helpers for &struct file_operations
- */
-
-/**
- * drm_vram_mm_file_operations_mmap() - \
-	Implements &struct file_operations.mmap()
- * @filp:	the mapping's file structure
- * @vma:	the mapping's memory area
- *
- * Returns:
- * 0 on success, or
- * a negative error code otherwise.
- */
-int drm_vram_mm_file_operations_mmap(
-	struct file *filp, struct vm_area_struct *vma)
-{
-	struct drm_file *file_priv = filp->private_data;
-	struct drm_device *dev = file_priv->minor->dev;
-
-	if (WARN_ONCE(!dev->vram_mm, "VRAM MM not initialized"))
-		return -EINVAL;
-
-	return drm_vram_mm_mmap(filp, vma, dev->vram_mm);
-}
-EXPORT_SYMBOL(drm_vram_mm_file_operations_mmap);
-- 
2.18.1

[PATCH v2 10/11] drm/vram: drop verify_access

[Gerd Hoffmann]

Not needed any more.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_gem_vram_helper.c | 22 ----------------------
 1 file changed, 22 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index e100b97ea6e3..42ee80414273 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -469,13 +469,6 @@ static void drm_gem_vram_bo_driver_evict_flags(struct drm_gem_vram_object *gbo,
 	*pl = gbo->placement;
 }
 
-static int drm_gem_vram_bo_driver_verify_access(struct drm_gem_vram_object *gbo,
-						struct file *filp)
-{
-	return drm_vma_node_verify_access(&gbo->bo.base.vma_node,
-					  filp->private_data);
-}
-
 static void drm_gem_vram_bo_driver_move_notify(struct drm_gem_vram_object *gbo,
 					       bool evict,
 					       struct ttm_mem_reg *new_mem)
@@ -767,20 +760,6 @@ static void bo_driver_evict_flags(struct ttm_buffer_object *bo,
 	drm_gem_vram_bo_driver_evict_flags(gbo, placement);
 }
 
-static int bo_driver_verify_access(struct ttm_buffer_object *bo,
-				   struct file *filp)
-{
-	struct drm_gem_vram_object *gbo;
-
-	/* TTM may pass BOs that are not GEM VRAM BOs. */
-	if (!drm_is_gem_vram(bo))
-		return -EINVAL;
-
-	gbo = drm_gem_vram_of_bo(bo);
-
-	return drm_gem_vram_bo_driver_verify_access(gbo, filp);
-}
-
 static void bo_driver_move_notify(struct ttm_buffer_object *bo,
 				  bool evict,
 				  struct ttm_mem_reg *new_mem)
@@ -837,7 +816,6 @@ static struct ttm_bo_driver bo_driver = {
 	.init_mem_type = bo_driver_init_mem_type,
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = bo_driver_evict_flags,
-	.verify_access = bo_driver_verify_access,
 	.move_notify = bo_driver_move_notify,
 	.io_mem_reserve = bo_driver_io_mem_reserve,
 	.io_mem_free = bo_driver_io_mem_free,
-- 
2.18.1

[PATCH v2 11/11] drm/vram: drop DRM_VRAM_MM_FILE_OPERATIONS

[Gerd Hoffmann]

Not needed any more because we don't have vram specific fops
any more.  DEFINE_DRM_GEM_FOPS() can be used instead.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 include/drm/drm_gem_vram_helper.h              | 18 ------------------
 drivers/gpu/drm/ast/ast_drv.c                  |  5 +----
 drivers/gpu/drm/bochs/bochs_drv.c              |  5 +----
 .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c    |  5 +----
 drivers/gpu/drm/mgag200/mgag200_drv.c          |  5 +----
 drivers/gpu/drm/vboxvideo/vbox_drv.c           |  5 +----
 6 files changed, 5 insertions(+), 38 deletions(-)

diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h
index 9d5526650291..3503ff784803 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -180,22 +180,4 @@ struct drm_vram_mm *drm_vram_helper_alloc_mm(
 	struct drm_device *dev, uint64_t vram_base, size_t vram_size);
 void drm_vram_helper_release_mm(struct drm_device *dev);
 
-/**
- * define DRM_VRAM_MM_FILE_OPERATIONS - default callback functions for \
-	&struct file_operations
- *
- * Drivers that use VRAM MM can use this macro to initialize
- * &struct file_operations with default functions.
- */
-#define DRM_VRAM_MM_FILE_OPERATIONS \
-	.llseek		= no_llseek, \
-	.read		= drm_read, \
-	.poll		= drm_poll, \
-	.unlocked_ioctl = drm_ioctl, \
-	.compat_ioctl	= drm_compat_ioctl, \
-	.mmap		= drm_gem_mmap, \
-	.open		= drm_open, \
-	.release	= drm_release \
-
-
 #endif
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index e0e8770462bc..1f17794b0890 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -200,10 +200,7 @@ static struct pci_driver ast_pci_driver = {
 	.driver.pm = &ast_pm_ops,
 };
 
-static const struct file_operations ast_fops = {
-	.owner = THIS_MODULE,
-	DRM_VRAM_MM_FILE_OPERATIONS
-};
+DEFINE_DRM_GEM_FOPS(ast_fops);
 
 static struct drm_driver driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM,
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index 3b9b0d9bbc14..10460878414e 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -58,10 +58,7 @@ static int bochs_load(struct drm_device *dev)
 	return ret;
 }
 
-static const struct file_operations bochs_fops = {
-	.owner		= THIS_MODULE,
-	DRM_VRAM_MM_FILE_OPERATIONS
-};
+DEFINE_DRM_GEM_FOPS(bochs_fops);
 
 static struct drm_driver bochs_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
index f5b35fdef6f3..b6fdac91e502 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
@@ -26,10 +26,7 @@
 #include "hibmc_drm_drv.h"
 #include "hibmc_drm_regs.h"
 
-static const struct file_operations hibmc_fops = {
-	.owner		= THIS_MODULE,
-	DRM_VRAM_MM_FILE_OPERATIONS
-};
+DEFINE_DRM_GEM_FOPS(hibmc_fops);
 
 static irqreturn_t hibmc_drm_interrupt(int irq, void *arg)
 {
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c
index 4f9df3b93598..397f8b0a9af8 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -58,10 +58,7 @@ static void mga_pci_remove(struct pci_dev *pdev)
 	drm_put_dev(dev);
 }
 
-static const struct file_operations mgag200_driver_fops = {
-	.owner = THIS_MODULE,
-	DRM_VRAM_MM_FILE_OPERATIONS
-};
+DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
 
 static struct drm_driver driver = {
 	.driver_features = DRIVER_GEM | DRIVER_MODESET,
diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c
index 862db495d111..0c37032c8b65 100644
--- a/drivers/gpu/drm/vboxvideo/vbox_drv.c
+++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c
@@ -189,10 +189,7 @@ static struct pci_driver vbox_pci_driver = {
 #endif
 };
 
-static const struct file_operations vbox_fops = {
-	.owner = THIS_MODULE,
-	DRM_VRAM_MM_FILE_OPERATIONS
-};
+DEFINE_DRM_GEM_FOPS(vbox_fops);
 
 static struct drm_driver driver = {
 	.driver_features =
-- 
2.18.1