diff mbox series

[v2,hwc] drm_hwcomposer: provide a common gralloc handle definition

Message ID 20171031145920.20343-1-robh@kernel.org
State New
Headers show
Series [v2,hwc] drm_hwcomposer: provide a common gralloc handle definition | expand

Commit Message

Rob Herring (Arm) Oct. 31, 2017, 2:59 p.m. UTC 
EGL, gralloc, and HWC must all have a common definition of fd's and int's
in native_handle_t to share the fd and width, height, format, etc. of a
dmabuf.

Move the definition into HWC so we aren't dependent on a specific gralloc
implementation and so we don't have to create an importer just for
different native_handle_t layouts. This will allow supporting multiple
gralloc implementations that conform to this layout.

For now, this is aligned with gbm_gralloc's struct. Once we change
gbm_gralloc and mesa to point to this copy, we can make modifications to
the struct.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 Android.mk           |  1 -
 gralloc_drm_handle.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+), 1 deletion(-)
 create mode 100644 gralloc_drm_handle.h

Comments

Daniel Vetter Oct. 31, 2017, 4:44 p.m. UTC | #1 
On Tue, Oct 31, 2017 at 09:59:20AM -0500, Rob Herring wrote:
> EGL, gralloc, and HWC must all have a common definition of fd's and int's
> in native_handle_t to share the fd and width, height, format, etc. of a
> dmabuf.
> 
> Move the definition into HWC so we aren't dependent on a specific gralloc
> implementation and so we don't have to create an importer just for
> different native_handle_t layouts. This will allow supporting multiple
> gralloc implementations that conform to this layout.
> 
> For now, this is aligned with gbm_gralloc's struct. Once we change
> gbm_gralloc and mesa to point to this copy, we can make modifications to
> the struct.
> 
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
>  Android.mk           |  1 -
>  gralloc_drm_handle.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 87 insertions(+), 1 deletion(-)
>  create mode 100644 gralloc_drm_handle.h
> 
> diff --git a/Android.mk b/Android.mk
> index 8b11e375adde..ee5b8bfb44d0 100644
> --- a/Android.mk
> +++ b/Android.mk
> @@ -47,7 +47,6 @@ LOCAL_SHARED_LIBRARIES := \
>  LOCAL_STATIC_LIBRARIES := libdrmhwc_utils
>  
>  LOCAL_C_INCLUDES := \
> -	external/drm_gralloc \
>  	system/core/libsync
>  
>  LOCAL_SRC_FILES := \
> diff --git a/gralloc_drm_handle.h b/gralloc_drm_handle.h
> new file mode 100644
> index 000000000000..e2f35dda539b
> --- /dev/null
> +++ b/gralloc_drm_handle.h
> @@ -0,0 +1,87 @@
> +/*
> + * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>
> + * Copyright (C) 2010-2011 LunarG Inc.
> + * Copyright (C) 2016-2017 Linaro, Ltd., Rob Herring <robh@kernel.org>
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included
> + * in all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + */
> +
> +#ifndef _GRALLOC_DRM_HANDLE_H_
> +#define _GRALLOC_DRM_HANDLE_H_
> +
> +#include <cutils/native_handle.h>
> +
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +struct gralloc_drm_handle_t {
> +	native_handle_t base;
> +
> +	/* file descriptors */
> +	int prime_fd;
> +
> +	/* integers */
> +	int magic;
> +
> +	int width;
> +	int height;
> +	int format;
> +	int usage;
> +
> +	int name;   /* the name of the bo */
> +	int stride; /* the stride in bytes */
> +	int data_owner; /* owner of data (for validation) */
> +
> +	uint64_t modifier __attribute__((aligned(8))); /* buffer modifiers */
> +	union {
> +		void *data; /* private pointer for gralloc */
> +		uint64_t reserved;
> +	} __attribute__((aligned(8)));
> +};
> +#define GRALLOC_HANDLE_MAGIC 0x5f47424d

Maybe add a

#define GRALLOC_HANDLE_VERSION 1
#define GRALLOC_HANDLE_MAGIC (0x5f47424d + GRALLOC_HANDLE_VERSION)

and a comment that the version needs to be incremented for every change,
to catch mismatching mesa/hwc versions? Given the layout there's no way to
add more fds in a backwards-compatible way, so we need full versioning I
think, and treat any change as a breaking one.
-Daniel

> +#define GRALLOC_HANDLE_NUM_INTS (						\
> +	((sizeof(struct gralloc_drm_handle_t) - sizeof(native_handle_t))/sizeof(int))	\
> +	 - GRALLOC_HANDLE_NUM_FDS)
> +
> +static inline struct gralloc_drm_handle_t *gralloc_drm_handle(buffer_handle_t _handle)
> +{
> +	struct gralloc_drm_handle_t *handle =
> +		(struct gralloc_drm_handle_t *) _handle;
> +
> +	if (handle && (handle->base.version != sizeof(handle->base) ||
> +	               handle->base.numInts != GRALLOC_HANDLE_NUM_INTS ||
> +	               handle->base.numFds != GRALLOC_HANDLE_NUM_FDS ||
> +	               handle->magic != GRALLOC_HANDLE_MAGIC))
> +		return NULL;
> +
> +	return handle;
> +}
> +
> +static inline int gralloc_drm_get_prime_fd(buffer_handle_t _handle)
> +{
> +	struct gralloc_drm_handle_t *handle = gralloc_drm_handle(_handle);
> +	return (handle) ? handle->prime_fd : -1;
> +}
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +#endif /* _GRALLOC_DRM_HANDLE_H_ */
> -- 
> 2.14.1
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
Robert Foss Oct. 31, 2017, 7:14 p.m. UTC | #2 
On Tue, 2017-10-31 at 17:44 +0100, Daniel Vetter wrote:
> On Tue, Oct 31, 2017 at 09:59:20AM -0500, Rob Herring wrote:

> > EGL, gralloc, and HWC must all have a common definition of fd's and

> > int's

> > in native_handle_t to share the fd and width, height, format, etc.

> > of a

> > dmabuf.

> > 

> > Move the definition into HWC so we aren't dependent on a specific

> > gralloc

> > implementation and so we don't have to create an importer just for

> > different native_handle_t layouts. This will allow supporting

> > multiple

> > gralloc implementations that conform to this layout.

> > 

> > For now, this is aligned with gbm_gralloc's struct. Once we change

> > gbm_gralloc and mesa to point to this copy, we can make

> > modifications to

> > the struct.

> > 

> > Signed-off-by: Rob Herring <robh@kernel.org>

> > ---

> >  Android.mk           |  1 -

> >  gralloc_drm_handle.h | 87

> > ++++++++++++++++++++++++++++++++++++++++++++++++++++

> >  2 files changed, 87 insertions(+), 1 deletion(-)

> >  create mode 100644 gralloc_drm_handle.h

> > 

> > diff --git a/Android.mk b/Android.mk

> > index 8b11e375adde..ee5b8bfb44d0 100644

> > --- a/Android.mk

> > +++ b/Android.mk

> > @@ -47,7 +47,6 @@ LOCAL_SHARED_LIBRARIES := \

> >  LOCAL_STATIC_LIBRARIES := libdrmhwc_utils

> >  

> >  LOCAL_C_INCLUDES := \

> > -	external/drm_gralloc \

> >  	system/core/libsync

> >  

> >  LOCAL_SRC_FILES := \

> > diff --git a/gralloc_drm_handle.h b/gralloc_drm_handle.h

> > new file mode 100644

> > index 000000000000..e2f35dda539b

> > --- /dev/null

> > +++ b/gralloc_drm_handle.h

> > @@ -0,0 +1,87 @@

> > +/*

> > + * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>

> > + * Copyright (C) 2010-2011 LunarG Inc.

> > + * Copyright (C) 2016-2017 Linaro, Ltd., Rob Herring <robh@kernel.

> > org>

> > + *

> > + * Permission is hereby granted, free of charge, to any person

> > obtaining a

> > + * copy of this software and associated documentation files (the

> > "Software"),

> > + * to deal in the Software without restriction, including without

> > limitation

> > + * the rights to use, copy, modify, merge, publish, distribute,

> > sublicense,

> > + * and/or sell copies of the Software, and to permit persons to

> > whom the

> > + * Software is furnished to do so, subject to the following

> > conditions:

> > + *

> > + * The above copyright notice and this permission notice shall be

> > included

> > + * in all copies or substantial portions of the Software.

> > + *

> > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

> > EXPRESS OR

> > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

> > MERCHANTABILITY,

> > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO

> > EVENT SHALL

> > + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

> > DAMAGES OR OTHER

> > + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

> > ARISING

> > + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

> > OTHER

> > + * DEALINGS IN THE SOFTWARE.

> > + */

> > +

> > +#ifndef _GRALLOC_DRM_HANDLE_H_

> > +#define _GRALLOC_DRM_HANDLE_H_

> > +

> > +#include <cutils/native_handle.h>

> > +

> > +#ifdef __cplusplus

> > +extern "C" {

> > +#endif

> > +

> > +struct gralloc_drm_handle_t {

> > +	native_handle_t base;

> > +

> > +	/* file descriptors */

> > +	int prime_fd;

> > +

> > +	/* integers */

> > +	int magic;

> > +

> > +	int width;

> > +	int height;

> > +	int format;

> > +	int usage;

> > +

> > +	int name;   /* the name of the bo */

> > +	int stride; /* the stride in bytes */

> > +	int data_owner; /* owner of data (for validation) */

> > +

> > +	uint64_t modifier __attribute__((aligned(8))); /* buffer

> > modifiers */

> > +	union {

> > +		void *data; /* private pointer for gralloc */

> > +		uint64_t reserved;

> > +	} __attribute__((aligned(8)));

> > +};

> > +#define GRALLOC_HANDLE_MAGIC 0x5f47424d

> 

> Maybe add a

> 

> #define GRALLOC_HANDLE_VERSION 1

> #define GRALLOC_HANDLE_MAGIC (0x5f47424d + GRALLOC_HANDLE_VERSION)

> 

> and a comment that the version needs to be incremented for every

> change,

> to catch mismatching mesa/hwc versions? Given the layout there's no

> way to

> add more fds in a backwards-compatible way, so we need full

> versioning I

> think, and treat any change as a breaking one.

> -Daniel


This seems like a good idea to me.
With this change feel free to add my r-b.

> 

> > +#define GRALLOC_HANDLE_NUM_INTS (					

> > 	\

> > +	((sizeof(struct gralloc_drm_handle_t) -

> > sizeof(native_handle_t))/sizeof(int))	\

> > +	 - GRALLOC_HANDLE_NUM_FDS)

> > +

> > +static inline struct gralloc_drm_handle_t

> > *gralloc_drm_handle(buffer_handle_t _handle)

> > +{

> > +	struct gralloc_drm_handle_t *handle =

> > +		(struct gralloc_drm_handle_t *) _handle;

> > +

> > +	if (handle && (handle->base.version != sizeof(handle-

> > >base) ||

> > +	               handle->base.numInts !=

> > GRALLOC_HANDLE_NUM_INTS ||

> > +	               handle->base.numFds !=

> > GRALLOC_HANDLE_NUM_FDS ||

> > +	               handle->magic != GRALLOC_HANDLE_MAGIC))

> > +		return NULL;

> > +

> > +	return handle;

> > +}

> > +

> > +static inline int gralloc_drm_get_prime_fd(buffer_handle_t

> > _handle)

> > +{

> > +	struct gralloc_drm_handle_t *handle =

> > gralloc_drm_handle(_handle);

> > +	return (handle) ? handle->prime_fd : -1;

> > +}

> > +

> > +#ifdef __cplusplus

> > +}

> > +#endif

> > +#endif /* _GRALLOC_DRM_HANDLE_H_ */

> > -- 

> > 2.14.1

> > 

> > _______________________________________________

> > dri-devel mailing list

> > dri-devel@lists.freedesktop.org

> > https://lists.freedesktop.org/mailman/listinfo/dri-devel

> 

>
Rob Herring (Arm) Oct. 31, 2017, 9:10 p.m. UTC | #3 
On Tue, Oct 31, 2017 at 11:44 AM, Daniel Vetter <daniel@ffwll.ch> wrote:
> On Tue, Oct 31, 2017 at 09:59:20AM -0500, Rob Herring wrote:
>> EGL, gralloc, and HWC must all have a common definition of fd's and int's
>> in native_handle_t to share the fd and width, height, format, etc. of a
>> dmabuf.

[...]

>> +#define GRALLOC_HANDLE_MAGIC 0x5f47424d
>
> Maybe add a
>
> #define GRALLOC_HANDLE_VERSION 1
> #define GRALLOC_HANDLE_MAGIC (0x5f47424d + GRALLOC_HANDLE_VERSION)
>
> and a comment that the version needs to be incremented for every change,
> to catch mismatching mesa/hwc versions? Given the layout there's no way to
> add more fds in a backwards-compatible way, so we need full versioning I
> think, and treat any change as a breaking one.

If we add or remove anything that will already be caught because sizes
are stored and checked.

The magic corresponds to 'GBM_'. Maybe we want to change that to
something else. However, I'd like to not change it just yet. My
intention was to keep it compatible, update gbm_gralloc and mesa
dependencies, then make any changes to this struct.

Rob
Daniel Vetter Nov. 1, 2017, 8:56 a.m. UTC | #4 
On Tue, Oct 31, 2017 at 04:10:52PM -0500, Rob Herring wrote:
> On Tue, Oct 31, 2017 at 11:44 AM, Daniel Vetter <daniel@ffwll.ch> wrote:
> > On Tue, Oct 31, 2017 at 09:59:20AM -0500, Rob Herring wrote:
> >> EGL, gralloc, and HWC must all have a common definition of fd's and int's
> >> in native_handle_t to share the fd and width, height, format, etc. of a
> >> dmabuf.
> 
> [...]
> 
> >> +#define GRALLOC_HANDLE_MAGIC 0x5f47424d
> >
> > Maybe add a
> >
> > #define GRALLOC_HANDLE_VERSION 1
> > #define GRALLOC_HANDLE_MAGIC (0x5f47424d + GRALLOC_HANDLE_VERSION)
> >
> > and a comment that the version needs to be incremented for every change,
> > to catch mismatching mesa/hwc versions? Given the layout there's no way to
> > add more fds in a backwards-compatible way, so we need full versioning I
> > think, and treat any change as a breaking one.
> 
> If we add or remove anything that will already be caught because sizes
> are stored and checked.
> 
> The magic corresponds to 'GBM_'. Maybe we want to change that to
> something else. However, I'd like to not change it just yet. My
> intention was to keep it compatible, update gbm_gralloc and mesa
> dependencies, then make any changes to this struct.

Hm, start out with version 0 then, to match? Anyway, was just a
suggestion, feel free to ignore :-)
-Daniel
diff mbox series

Patch

diff --git a/Android.mk b/Android.mk
index 8b11e375adde..ee5b8bfb44d0 100644
--- a/Android.mk
+++ b/Android.mk
@@ -47,7 +47,6 @@  LOCAL_SHARED_LIBRARIES := \
 LOCAL_STATIC_LIBRARIES := libdrmhwc_utils
 
 LOCAL_C_INCLUDES := \
-	external/drm_gralloc \
 	system/core/libsync
 
 LOCAL_SRC_FILES := \
diff --git a/gralloc_drm_handle.h b/gralloc_drm_handle.h
new file mode 100644
index 000000000000..e2f35dda539b
--- /dev/null
+++ b/gralloc_drm_handle.h
@@ -0,0 +1,87 @@ 
+/*
+ * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright (C) 2010-2011 LunarG Inc.
+ * Copyright (C) 2016-2017 Linaro, Ltd., Rob Herring <robh@kernel.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _GRALLOC_DRM_HANDLE_H_
+#define _GRALLOC_DRM_HANDLE_H_
+
+#include <cutils/native_handle.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct gralloc_drm_handle_t {
+	native_handle_t base;
+
+	/* file descriptors */
+	int prime_fd;
+
+	/* integers */
+	int magic;
+
+	int width;
+	int height;
+	int format;
+	int usage;
+
+	int name;   /* the name of the bo */
+	int stride; /* the stride in bytes */
+	int data_owner; /* owner of data (for validation) */
+
+	uint64_t modifier __attribute__((aligned(8))); /* buffer modifiers */
+	union {
+		void *data; /* private pointer for gralloc */
+		uint64_t reserved;
+	} __attribute__((aligned(8)));
+};
+#define GRALLOC_HANDLE_MAGIC 0x5f47424d
+#define GRALLOC_HANDLE_NUM_FDS 1
+#define GRALLOC_HANDLE_NUM_INTS (						\
+	((sizeof(struct gralloc_drm_handle_t) - sizeof(native_handle_t))/sizeof(int))	\
+	 - GRALLOC_HANDLE_NUM_FDS)
+
+static inline struct gralloc_drm_handle_t *gralloc_drm_handle(buffer_handle_t _handle)
+{
+	struct gralloc_drm_handle_t *handle =
+		(struct gralloc_drm_handle_t *) _handle;
+
+	if (handle && (handle->base.version != sizeof(handle->base) ||
+	               handle->base.numInts != GRALLOC_HANDLE_NUM_INTS ||
+	               handle->base.numFds != GRALLOC_HANDLE_NUM_FDS ||
+	               handle->magic != GRALLOC_HANDLE_MAGIC))
+		return NULL;
+
+	return handle;
+}
+
+static inline int gralloc_drm_get_prime_fd(buffer_handle_t _handle)
+{
+	struct gralloc_drm_handle_t *handle = gralloc_drm_handle(_handle);
+	return (handle) ? handle->prime_fd : -1;
+}
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _GRALLOC_DRM_HANDLE_H_ */