[Intel-gfx] [PATCH 01/10] drm: Extract drm_dumb_buffers.c
Daniel Vetter
daniel.vetter at ffwll.ch
Mon Nov 14 11:58:16 UTC 2016
Just code movement, doc cleanup will follow up later.
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/Makefile | 3 +-
drivers/gpu/drm/drm_crtc.c | 109 -----------------------------
drivers/gpu/drm/drm_crtc_internal.h | 18 ++---
drivers/gpu/drm/drm_dumb_buffers.c | 135 ++++++++++++++++++++++++++++++++++++
4 files changed, 147 insertions(+), 118 deletions(-)
create mode 100644 drivers/gpu/drm/drm_dumb_buffers.c
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index f217274754d4..adcfc8f922e3 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -15,7 +15,8 @@ drm-y := drm_auth.o drm_bufs.o drm_cache.o \
drm_modeset_lock.o drm_atomic.o drm_bridge.o \
drm_framebuffer.o drm_connector.o drm_blend.o \
drm_encoder.o drm_mode_object.o drm_property.o \
- drm_plane.o drm_color_mgmt.o drm_print.o
+ drm_plane.o drm_color_mgmt.o drm_print.o \
+ drm_dumb_buffers.o
drm-$(CONFIG_COMPAT) += drm_ioc32.o
drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 4f34d9a34190..0ece33cc0dc6 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -960,115 +960,6 @@ void drm_mode_config_reset(struct drm_device *dev)
EXPORT_SYMBOL(drm_mode_config_reset);
/**
- * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
- * @dev: DRM device
- * @data: ioctl data
- * @file_priv: DRM file info
- *
- * This creates a new dumb buffer in the driver's backing storage manager (GEM,
- * TTM or something else entirely) and returns the resulting buffer handle. This
- * handle can then be wrapped up into a framebuffer modeset object.
- *
- * Note that userspace is not allowed to use such objects for render
- * acceleration - drivers must create their own private ioctls for such a use
- * case.
- *
- * Called by the user via ioctl.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
-int drm_mode_create_dumb_ioctl(struct drm_device *dev,
- void *data, struct drm_file *file_priv)
-{
- struct drm_mode_create_dumb *args = data;
- u32 cpp, stride, size;
-
- if (!dev->driver->dumb_create)
- return -ENOSYS;
- if (!args->width || !args->height || !args->bpp)
- return -EINVAL;
-
- /* overflow checks for 32bit size calculations */
- /* NOTE: DIV_ROUND_UP() can overflow */
- cpp = DIV_ROUND_UP(args->bpp, 8);
- if (!cpp || cpp > 0xffffffffU / args->width)
- return -EINVAL;
- stride = cpp * args->width;
- if (args->height > 0xffffffffU / stride)
- return -EINVAL;
-
- /* test for wrap-around */
- size = args->height * stride;
- if (PAGE_ALIGN(size) == 0)
- return -EINVAL;
-
- /*
- * handle, pitch and size are output parameters. Zero them out to
- * prevent drivers from accidentally using uninitialized data. Since
- * not all existing userspace is clearing these fields properly we
- * cannot reject IOCTL with garbage in them.
- */
- args->handle = 0;
- args->pitch = 0;
- args->size = 0;
-
- return dev->driver->dumb_create(file_priv, dev, args);
-}
-
-/**
- * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
- * @dev: DRM device
- * @data: ioctl data
- * @file_priv: DRM file info
- *
- * Allocate an offset in the drm device node's address space to be able to
- * memory map a dumb buffer.
- *
- * Called by the user via ioctl.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
-int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
- void *data, struct drm_file *file_priv)
-{
- struct drm_mode_map_dumb *args = data;
-
- /* call driver ioctl to get mmap offset */
- if (!dev->driver->dumb_map_offset)
- return -ENOSYS;
-
- return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
-}
-
-/**
- * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
- * @dev: DRM device
- * @data: ioctl data
- * @file_priv: DRM file info
- *
- * This destroys the userspace handle for the given dumb backing storage buffer.
- * Since buffer objects must be reference counted in the kernel a buffer object
- * won't be immediately freed if a framebuffer modeset object still uses it.
- *
- * Called by the user via ioctl.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
-int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
- void *data, struct drm_file *file_priv)
-{
- struct drm_mode_destroy_dumb *args = data;
-
- if (!dev->driver->dumb_destroy)
- return -ENOSYS;
-
- return dev->driver->dumb_destroy(file_priv, dev, args->handle);
-}
-
-/**
* drm_mode_config_init - initialize DRM mode_configuration structure
* @dev: DRM device
*
diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index b076ef58635d..3d23a473ec35 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -43,14 +43,6 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
void drm_fb_release(struct drm_file *file_priv);
-/* dumb buffer support IOCTLs */
-int drm_mode_create_dumb_ioctl(struct drm_device *dev,
- void *data, struct drm_file *file_priv);
-int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
- void *data, struct drm_file *file_priv);
-int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
- void *data, struct drm_file *file_priv);
-
/* IOCTLs */
int drm_mode_getresources(struct drm_device *dev,
void *data, struct drm_file *file_priv);
@@ -59,6 +51,16 @@ int drm_mode_getcrtc(struct drm_device *dev,
int drm_mode_setcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv);
+/* drm_dumb_buffers.c */
+
+/* IOCTLs */
+int drm_mode_create_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv);
+int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv);
+int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv);
+
/* drm_color_mgmt.c */
/* IOCTLs */
diff --git a/drivers/gpu/drm/drm_dumb_buffers.c b/drivers/gpu/drm/drm_dumb_buffers.c
new file mode 100644
index 000000000000..4b4364b61c8d
--- /dev/null
+++ b/drivers/gpu/drm/drm_dumb_buffers.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no representations
+ * about the suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <drm/drmP.h>
+
+#include "drm_crtc_internal.h"
+
+/**
+ * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This creates a new dumb buffer in the driver's backing storage manager (GEM,
+ * TTM or something else entirely) and returns the resulting buffer handle. This
+ * handle can then be wrapped up into a framebuffer modeset object.
+ *
+ * Note that userspace is not allowed to use such objects for render
+ * acceleration - drivers must create their own private ioctls for such a use
+ * case.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_create_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_create_dumb *args = data;
+ u32 cpp, stride, size;
+
+ if (!dev->driver->dumb_create)
+ return -ENOSYS;
+ if (!args->width || !args->height || !args->bpp)
+ return -EINVAL;
+
+ /* overflow checks for 32bit size calculations */
+ /* NOTE: DIV_ROUND_UP() can overflow */
+ cpp = DIV_ROUND_UP(args->bpp, 8);
+ if (!cpp || cpp > 0xffffffffU / args->width)
+ return -EINVAL;
+ stride = cpp * args->width;
+ if (args->height > 0xffffffffU / stride)
+ return -EINVAL;
+
+ /* test for wrap-around */
+ size = args->height * stride;
+ if (PAGE_ALIGN(size) == 0)
+ return -EINVAL;
+
+ /*
+ * handle, pitch and size are output parameters. Zero them out to
+ * prevent drivers from accidentally using uninitialized data. Since
+ * not all existing userspace is clearing these fields properly we
+ * cannot reject IOCTL with garbage in them.
+ */
+ args->handle = 0;
+ args->pitch = 0;
+ args->size = 0;
+
+ return dev->driver->dumb_create(file_priv, dev, args);
+}
+
+/**
+ * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * Allocate an offset in the drm device node's address space to be able to
+ * memory map a dumb buffer.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_map_dumb *args = data;
+
+ /* call driver ioctl to get mmap offset */
+ if (!dev->driver->dumb_map_offset)
+ return -ENOSYS;
+
+ return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
+}
+
+/**
+ * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This destroys the userspace handle for the given dumb backing storage buffer.
+ * Since buffer objects must be reference counted in the kernel a buffer object
+ * won't be immediately freed if a framebuffer modeset object still uses it.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_destroy_dumb *args = data;
+
+ if (!dev->driver->dumb_destroy)
+ return -ENOSYS;
+
+ return dev->driver->dumb_destroy(file_priv, dev, args->handle);
+}
+
--
2.10.2
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