[PATCH 2/3] drm/shmem-helper: Export dedicated wrappers for GEM object functions
Thomas Zimmermann
tzimmermann at suse.de
Fri Nov 5 09:35:57 UTC 2021
Wrap GEM SHMEM functions for struct drm_gem_object_funcs and update
all callers. This will allow for an update of the public interfaces
of the GEM SHMEM helper library.
Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
drivers/gpu/drm/drm_gem_shmem_helper.c | 45 ++++-----
drivers/gpu/drm/lima/lima_gem.c | 8 +-
drivers/gpu/drm/panfrost/panfrost_gem.c | 12 +--
drivers/gpu/drm/v3d/v3d_bo.c | 14 +--
drivers/gpu/drm/virtio/virtgpu_object.c | 15 ++-
include/drm/drm_gem_shmem_helper.h | 120 ++++++++++++++++++++++++
6 files changed, 161 insertions(+), 53 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index cd93e91b3487..72ac263f20be 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -30,14 +30,14 @@
*/
static const struct drm_gem_object_funcs drm_gem_shmem_funcs = {
- .free = drm_gem_shmem_free_object,
- .print_info = drm_gem_shmem_print_info,
- .pin = drm_gem_shmem_pin,
- .unpin = drm_gem_shmem_unpin,
- .get_sg_table = drm_gem_shmem_get_sg_table,
- .vmap = drm_gem_shmem_vmap,
- .vunmap = drm_gem_shmem_vunmap,
- .mmap = drm_gem_shmem_mmap,
+ .free = drm_gem_shmem_object_free,
+ .print_info = drm_gem_shmem_object_print_info,
+ .pin = drm_gem_shmem_object_pin,
+ .unpin = drm_gem_shmem_object_unpin,
+ .get_sg_table = drm_gem_shmem_object_get_sg_table,
+ .vmap = drm_gem_shmem_object_vmap,
+ .vunmap = drm_gem_shmem_object_vunmap,
+ .mmap = drm_gem_shmem_object_mmap,
};
static struct drm_gem_shmem_object *
@@ -121,8 +121,7 @@ EXPORT_SYMBOL_GPL(drm_gem_shmem_create);
* @obj: GEM object to free
*
* This function cleans up the GEM object state and frees the memory used to
- * store the object itself. It should be used to implement
- * &drm_gem_object_funcs.free.
+ * store the object itself.
*/
void drm_gem_shmem_free_object(struct drm_gem_object *obj)
{
@@ -248,8 +247,7 @@ EXPORT_SYMBOL(drm_gem_shmem_put_pages);
* @obj: GEM object
*
* This function makes sure the backing pages are pinned in memory while the
- * buffer is exported. It should only be used to implement
- * &drm_gem_object_funcs.pin.
+ * buffer is exported.
*
* Returns:
* 0 on success or a negative error code on failure.
@@ -269,7 +267,7 @@ EXPORT_SYMBOL(drm_gem_shmem_pin);
* @obj: GEM object
*
* This function removes the requirement that the backing pages are pinned in
- * memory. It should only be used to implement &drm_gem_object_funcs.unpin.
+ * memory.
*/
void drm_gem_shmem_unpin(struct drm_gem_object *obj)
{
@@ -340,11 +338,8 @@ static int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object *shmem, struct
* store.
*
* This function makes sure that a contiguous kernel virtual address mapping
- * exists for the buffer backing the shmem GEM object.
- *
- * This function can be used to implement &drm_gem_object_funcs.vmap. But it can
- * also be called by drivers directly, in which case it will hide the
- * differences between dma-buf imported and natively allocated objects.
+ * exists for the buffer backing the shmem GEM object. It hides the differences
+ * between dma-buf imported and natively allocated objects.
*
* Acquired mappings should be cleaned up by calling drm_gem_shmem_vunmap().
*
@@ -396,9 +391,8 @@ static void drm_gem_shmem_vunmap_locked(struct drm_gem_shmem_object *shmem,
* drm_gem_shmem_vmap(). The mapping is only removed when the use count drops to
* zero.
*
- * This function can be used to implement &drm_gem_object_funcs.vmap. But it can
- * also be called by drivers directly, in which case it will hide the
- * differences between dma-buf imported and natively allocated objects.
+ * This function hides the differences between dma-buf imported and natively
+ * allocated objects.
*/
void drm_gem_shmem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
{
@@ -604,8 +598,7 @@ static const struct vm_operations_struct drm_gem_shmem_vm_ops = {
* @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 &drm_gem_object_funcs.mmap handler.
+ * operation for shmem objects.
*
* Returns:
* 0 on success or a negative error code on failure.
@@ -646,8 +639,6 @@ EXPORT_SYMBOL_GPL(drm_gem_shmem_mmap);
* @p: DRM printer
* @indent: Tab indentation level
* @obj: GEM object
- *
- * This implements the &drm_gem_object_funcs.info callback.
*/
void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent,
const struct drm_gem_object *obj)
@@ -666,9 +657,7 @@ EXPORT_SYMBOL(drm_gem_shmem_print_info);
* @obj: GEM object
*
* This function exports a scatter/gather table suitable for PRIME usage by
- * calling the standard DMA mapping API. Drivers should not call this function
- * directly, instead it should only be used as an implementation for
- * &drm_gem_object_funcs.get_sg_table.
+ * calling the standard DMA mapping API.
*
* Drivers who need to acquire an scatter/gather table for objects need to call
* drm_gem_shmem_get_pages_sgt() instead.
diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
index 640acc060467..a5580bd6522c 100644
--- a/drivers/gpu/drm/lima/lima_gem.c
+++ b/drivers/gpu/drm/lima/lima_gem.c
@@ -206,12 +206,12 @@ static const struct drm_gem_object_funcs lima_gem_funcs = {
.free = lima_gem_free_object,
.open = lima_gem_object_open,
.close = lima_gem_object_close,
- .print_info = drm_gem_shmem_print_info,
+ .print_info = drm_gem_shmem_object_print_info,
.pin = lima_gem_pin,
- .unpin = drm_gem_shmem_unpin,
- .get_sg_table = drm_gem_shmem_get_sg_table,
+ .unpin = drm_gem_shmem_object_unpin,
+ .get_sg_table = drm_gem_shmem_object_get_sg_table,
.vmap = lima_gem_vmap,
- .vunmap = drm_gem_shmem_vunmap,
+ .vunmap = drm_gem_shmem_object_vunmap,
.mmap = lima_gem_mmap,
};
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c
index 23377481f4e3..be1cc6579a71 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
@@ -197,13 +197,13 @@ static const struct drm_gem_object_funcs panfrost_gem_funcs = {
.free = panfrost_gem_free_object,
.open = panfrost_gem_open,
.close = panfrost_gem_close,
- .print_info = drm_gem_shmem_print_info,
+ .print_info = drm_gem_shmem_object_print_info,
.pin = panfrost_gem_pin,
- .unpin = drm_gem_shmem_unpin,
- .get_sg_table = drm_gem_shmem_get_sg_table,
- .vmap = drm_gem_shmem_vmap,
- .vunmap = drm_gem_shmem_vunmap,
- .mmap = drm_gem_shmem_mmap,
+ .unpin = drm_gem_shmem_object_unpin,
+ .get_sg_table = drm_gem_shmem_object_get_sg_table,
+ .vmap = drm_gem_shmem_object_vmap,
+ .vunmap = drm_gem_shmem_object_vunmap,
+ .mmap = drm_gem_shmem_object_mmap,
};
/**
diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c
index 6a8731ab9d7d..b50677beb6ac 100644
--- a/drivers/gpu/drm/v3d/v3d_bo.c
+++ b/drivers/gpu/drm/v3d/v3d_bo.c
@@ -52,13 +52,13 @@ void v3d_free_object(struct drm_gem_object *obj)
static const struct drm_gem_object_funcs v3d_gem_funcs = {
.free = v3d_free_object,
- .print_info = drm_gem_shmem_print_info,
- .pin = drm_gem_shmem_pin,
- .unpin = drm_gem_shmem_unpin,
- .get_sg_table = drm_gem_shmem_get_sg_table,
- .vmap = drm_gem_shmem_vmap,
- .vunmap = drm_gem_shmem_vunmap,
- .mmap = drm_gem_shmem_mmap,
+ .print_info = drm_gem_shmem_object_print_info,
+ .pin = drm_gem_shmem_object_pin,
+ .unpin = drm_gem_shmem_object_unpin,
+ .get_sg_table = drm_gem_shmem_object_get_sg_table,
+ .vmap = drm_gem_shmem_object_vmap,
+ .vunmap = drm_gem_shmem_object_vunmap,
+ .mmap = drm_gem_shmem_object_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 f648b0e24447..698431d233b8 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -116,15 +116,14 @@ static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = {
.free = virtio_gpu_free_object,
.open = virtio_gpu_gem_object_open,
.close = virtio_gpu_gem_object_close,
-
- .print_info = drm_gem_shmem_print_info,
+ .print_info = drm_gem_shmem_object_print_info,
.export = virtgpu_gem_prime_export,
- .pin = drm_gem_shmem_pin,
- .unpin = drm_gem_shmem_unpin,
- .get_sg_table = drm_gem_shmem_get_sg_table,
- .vmap = drm_gem_shmem_vmap,
- .vunmap = drm_gem_shmem_vunmap,
- .mmap = drm_gem_shmem_mmap,
+ .pin = drm_gem_shmem_object_pin,
+ .unpin = drm_gem_shmem_object_unpin,
+ .get_sg_table = drm_gem_shmem_object_get_sg_table,
+ .vmap = drm_gem_shmem_object_vmap,
+ .vunmap = drm_gem_shmem_object_vunmap,
+ .mmap = drm_gem_shmem_object_mmap,
};
bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo)
diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h
index 6b47eb7d9f76..efc59dd4aeeb 100644
--- a/include/drm/drm_gem_shmem_helper.h
+++ b/include/drm/drm_gem_shmem_helper.h
@@ -137,6 +137,126 @@ void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent,
const struct drm_gem_object *obj);
struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj);
+
+/*
+ * GEM object functions
+ */
+
+/**
+ * drm_gem_shmem_object_free - GEM object function for drm_gem_shmem_free_object()
+ * @obj: GEM object to free
+ *
+ * This function wraps drm_gem_shmem_free_object(). Drivers that employ the shmem helpers
+ * should use it as their &drm_gem_object_funcs.free handler.
+ */
+static inline void drm_gem_shmem_object_free(struct drm_gem_object *obj)
+{
+ drm_gem_shmem_free_object(obj);
+}
+
+/**
+ * drm_gem_shmem_print_info() - Print &drm_gem_shmem_object info for debugfs
+ * @p: DRM printer
+ * @indent: Tab indentation level
+ * @obj: GEM object
+ *
+ * This function wraps drm_gem_shmem_mmap(). Drivers that employ the shmem helpers should
+ * use this function as their &drm_gem_object_funcs.mmap handler.
+ */
+static inline void drm_gem_shmem_object_print_info(struct drm_printer *p, unsigned int indent,
+ const struct drm_gem_object *obj)
+{
+ drm_gem_shmem_print_info(p, indent, obj);
+}
+
+/**
+ * drm_gem_shmem_object_pin - GEM object function for drm_gem_shmem_pin()
+ * @obj: GEM object
+ *
+ * This function wraps drm_gem_shmem_pin(). Drivers that employ the shmem helpers should
+ * use it as their &drm_gem_object_funcs.pin handler.
+ */
+static inline int drm_gem_shmem_object_pin(struct drm_gem_object *obj)
+{
+ return drm_gem_shmem_pin(obj);
+}
+
+/**
+ * drm_gem_shmem_object_unpin - GEM object function for drm_gem_shmem_unpin()
+ * @obj: GEM object
+ *
+ * This function wraps drm_gem_shmem_unpin(). Drivers that employ the shmem helpers should
+ * use it as their &drm_gem_object_funcs.unpin handler.
+ */
+static inline void drm_gem_shmem_object_unpin(struct drm_gem_object *obj)
+{
+ drm_gem_shmem_unpin(obj);
+}
+
+/**
+ * drm_gem_shmem_object_get_sg_table - GEM object function for drm_gem_shmem_get_sg_table()
+ * @obj: GEM object
+ *
+ * This function wraps drm_gem_shmem_get_sg_table(). Drivers that employ the shmem helpers should
+ * use it as their &drm_gem_object_funcs.get_sg_table handler.
+ *
+ * Returns:
+ * A pointer to the scatter/gather table of pinned pages or NULL on failure.
+ */
+static inline struct sg_table *drm_gem_shmem_object_get_sg_table(struct drm_gem_object *obj)
+{
+ return drm_gem_shmem_get_sg_table(obj);
+}
+
+/*
+ * drm_gem_shmem_object_vmap - GEM object function for drm_gem_shmem_vmap()
+ * @obj: GEM object
+ * @map: Returns the kernel virtual address of the SHMEM GEM object's backing store.
+ *
+ * This function wraps drm_gem_shmem_vmap(). Drivers that employ the shmem helpers should
+ * use it as their &drm_gem_object_funcs.vmap handler.
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure.
+ */
+static inline int drm_gem_shmem_object_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
+{
+ return drm_gem_shmem_vmap(obj, map);
+}
+
+/*
+ * drm_gem_shmem_object_vunmap - GEM object function for drm_gem_shmem_vunmap()
+ * @obj: GEM object
+ * @map: Kernel virtual address where the SHMEM GEM object was mapped
+ *
+ * This function wraps drm_gem_shmem_vunmap(). Drivers that employ the shmem helpers should
+ * use it as their &drm_gem_object_funcs.vunmap handler.
+ */
+static inline void drm_gem_shmem_object_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
+{
+ drm_gem_shmem_vunmap(obj, map);
+}
+
+/**
+ * drm_gem_shmem_object_mmap - GEM object function for drm_gem_shmem_mmap()
+ * @obj: GEM object
+ * @vma: VMA for the area to be mapped
+ *
+ * This function wraps drm_gem_shmem_mmap(). Drivers that employ the shmem helpers should
+ * use it as their &drm_gem_object_funcs.mmap handler.
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure.
+ */
+static inline int drm_gem_shmem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+{
+ return drm_gem_shmem_mmap(obj, vma);
+}
+
+/*
+ * Driver ops
+ */
+
struct drm_gem_object *
drm_gem_shmem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
--
2.33.1
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