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gma500: allow the creation of 'stolen' memory objects

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For things like cursors and many kinds of framebuffer set up we are actually
best using the stolen memory when possible.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2011-07-15 17:33:08 +01:00 committed by Greg Kroah-Hartman
parent 7dfe43c52d
commit 7d7b7adf6b
2 changed files with 26 additions and 1 deletions
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24
drivers/staging/gma500/gem.c
View file

@ -251,6 +251,21 @@ int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
}
}
static int psb_gem_create_stolen(struct drm_file *file, struct drm_device *dev,
int size, u32 *handle)
{
struct gtt_range *gtt = psb_gtt_alloc_range(dev, size, "gem", 1);
if (gtt == NULL)
return -ENOMEM;
if (drm_gem_private_object_init(dev, &gtt->gem, size) != 0)
goto free_gtt;
if (drm_gem_handle_create(file, &gtt->gem, handle) == 0)
return 0;
free_gtt:
psb_gtt_free_range(dev, gtt);
return -ENOMEM;
}
/*
* GEM interfaces for our specific client
*/
@ -258,6 +273,15 @@ int psb_gem_create_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_psb_gem_create *args = data;
int ret;
if (args->flags & PSB_GEM_CREATE_STOLEN) {
ret = psb_gem_create_stolen(file, dev, args->size,
&args->handle);
if (ret == 0)
return 0;
/* Fall throguh */
args->flags &= ~PSB_GEM_CREATE_STOLEN;
}
return psb_gem_create(file, dev, args->size, &args->handle);
}

3
drivers/staging/gma500/psb_drm.h
View file

@ -189,7 +189,8 @@ struct psb_drm_dpu_rect {
struct drm_psb_gem_create {
__u64 size;
__u32 handle;
__u32 pad;
__u32 flags;
#define PSB_GEM_CREATE_STOLEN 1 /* Stolen memory can be used */
};
#define PSB_2D_OP_BUFLEN 16