[PATCH 0/3] drm: add mmap() to drm_gem_object_funcs

[PATCH 0/3] drm: add mmap() to drm_gem_object_funcs

[Gerd Hoffmann]

Add a new callback where drivers can handle mmap setup
without having to override gem_driver->fops->mmap.

Switch shmem helper over as demo.

cheers,
  Gerd

Gerd Hoffmann (3):
  drm: add mmap() to drm_gem_object_funcs
  drm: switch shmem helper to drm_gem_object_funcs->mmap
  drm: drop DEFINE_DRM_GEM_SHMEM_FOPS

 include/drm/drm_gem.h                   |  9 ++++++++
 include/drm/drm_gem_shmem_helper.h      | 28 +------------------------
 drivers/gpu/drm/cirrus/cirrus.c         |  2 +-
 drivers/gpu/drm/drm_gem.c               |  4 ++++
 drivers/gpu/drm/drm_gem_shmem_helper.c  | 18 +++++++---------
 drivers/gpu/drm/panfrost/panfrost_drv.c |  2 +-
 drivers/gpu/drm/panfrost/panfrost_gem.c |  1 +
 drivers/gpu/drm/v3d/v3d_bo.c            |  1 +
 drivers/gpu/drm/v3d/v3d_drv.c           |  2 +-
 9 files changed, 26 insertions(+), 41 deletions(-)

-- 
2.18.1

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[PATCH 1/3] drm: add mmap() to drm_gem_object_funcs

[Gerd Hoffmann]

drm_gem_object_funcs->vm_ops alone can't handle
everything mmap() needs.  Add a new callback for it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/drm/drm_gem.h     | 9 +++++++++
 drivers/gpu/drm/drm_gem.c | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index a9121fe66ea2..2e680a065470 100644
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -144,6 +144,15 @@ struct drm_gem_object_funcs {
 	 */
 	void (*vunmap)(struct drm_gem_object *obj, void *vaddr);
 
+	/**
+	 * @mmap:
+	 *
+	 * Called by drm_gem_mmap() for additional checks/setup.
+	 *
+	 * This callback is optional.
+	 */
+	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 a8c4468f03d9..1deae1b70f39 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -1192,6 +1192,10 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 	ret = drm_gem_mmap_obj(obj, drm_vma_node_size(node) << PAGE_SHIFT,
 			       vma);
 
+	if (ret == 0)
+		if (obj->funcs->mmap)
+			ret = obj->funcs->mmap(obj, vma);
+
 	drm_gem_object_put_unlocked(obj);
 
 	return ret;
-- 
2.18.1

[PATCH 2/3] drm: switch shmem helper to drm_gem_object_funcs->mmap

[Gerd Hoffmann]

Switch gem shmem helper from gem_driver->fops->mmap to
drm_gem_object_funcs->mmap.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/drm/drm_gem_shmem_helper.h      |  4 ++--
 drivers/gpu/drm/drm_gem_shmem_helper.c  | 18 +++++++-----------
 drivers/gpu/drm/panfrost/panfrost_gem.c |  1 +
 drivers/gpu/drm/v3d/v3d_bo.c            |  1 +
 4 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index 038b6d313447..0f7b77cdc26b 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -108,7 +108,7 @@ 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);
@@ -128,7 +128,7 @@ 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);
+int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
 
 extern const struct vm_operations_struct drm_gem_shmem_vm_ops;
 
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 1ee208c2c85e..d5a248858486 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -31,6 +31,7 @@ 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,
+	.mmap = drm_gem_shmem_mmap,
 	.vm_ops = &drm_gem_shmem_vm_ops,
 };
 
@@ -446,30 +447,25 @@ 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.
+ * use this function as their &drm_gem_object_funcs.mmap handler.
  *
- * Instead of directly referencing this function, drivers should use the
- * DEFINE_DRM_GEM_SHMEM_FOPS() macro.
+ * Instead of directly referencing this function, drivers can use
+ * drm_gem_shmem_funcs.
  *
  * 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) {
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c
index 886875ae31d3..23a6f04cfade 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
@@ -36,6 +36,7 @@ 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,
+	.mmap = drm_gem_shmem_mmap,
 	.vm_ops = &drm_gem_shmem_vm_ops,
 };
 
diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c
index a22b75a3a533..c01e2b952451 100644
--- a/drivers/gpu/drm/v3d/v3d_bo.c
+++ b/drivers/gpu/drm/v3d/v3d_bo.c
@@ -58,6 +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,
+	.mmap = drm_gem_shmem_mmap,
 	.vm_ops = &drm_gem_shmem_vm_ops,
 };
 
-- 
2.18.1

[PATCH 3/3] drm: 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>
---
 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/v3d/v3d_drv.c           |  2 +-
 4 files changed, 3 insertions(+), 29 deletions(-)

diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index 0f7b77cdc26b..813240dcfe17 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -85,32 +85,6 @@ 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 be4ea370ba31..600a3fa7783f 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 | DRIVER_PRIME,
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index d11e2281dde6..0b32e5028c33 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -339,7 +339,7 @@ static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = {
 	PANFROST_IOCTL(GET_BO_OFFSET,	get_bo_offset,	DRM_RENDER_ALLOW),
 };
 
-DEFINE_DRM_GEM_SHMEM_FOPS(panfrost_drm_driver_fops);
+DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops);
 
 static struct drm_driver panfrost_drm_driver = {
 	.driver_features	= DRIVER_RENDER | DRIVER_GEM | DRIVER_PRIME |
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index fea597f4db8a..2ca9ffa1c4c1 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -166,7 +166,7 @@ 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
-- 
2.18.1