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55fb74adc6
There is no reason to keep the gem object separately allocated. nouveau is the last user of gem_obj->driver_private, so if we embed it, we can get rid of 8bytes per gem-object. The implementation follows the radeon driver. bo->gem is only valid, iff the bo was created via the gem helpers _and_ iff the user holds a valid gem reference. That is, as the gem object holds a reference to the nouveau_bo. If you use nouveau_ref() to gain a bo reference, you are not guaranteed to also hold a gem reference. The gem object might get destroyed after the last user drops the gem-ref via drm_gem_object_unreference(). Use drm_gem_object_reference() to gain a gem-reference. For debugging, we can use bo->gem.filp != NULL to test whether a gem-bo is valid. However, this shouldn't be used for real functionality to avoid gem-internal dependencies. Note that the implementation follows the previous style. However, we no longer can check for bo->gem != NULL to test for a valid gem object. This wasn't done before, so we should be safe now. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Acked-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
#ifndef __NOUVEAU_GEM_H__
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#define __NOUVEAU_GEM_H__
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#include <drm/drmP.h>
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#include "nouveau_drm.h"
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#include "nouveau_bo.h"
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#define nouveau_bo_tile_layout(nvbo) \
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((nvbo)->tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK)
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static inline struct nouveau_bo *
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nouveau_gem_object(struct drm_gem_object *gem)
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{
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return gem ? container_of(gem, struct nouveau_bo, gem) : NULL;
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}
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/* nouveau_gem.c */
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extern int nouveau_gem_new(struct drm_device *, int size, int align,
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uint32_t domain, uint32_t tile_mode,
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uint32_t tile_flags, struct nouveau_bo **);
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extern int nouveau_gem_object_new(struct drm_gem_object *);
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extern void nouveau_gem_object_del(struct drm_gem_object *);
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extern int nouveau_gem_object_open(struct drm_gem_object *, struct drm_file *);
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extern void nouveau_gem_object_close(struct drm_gem_object *,
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struct drm_file *);
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extern int nouveau_gem_ioctl_new(struct drm_device *, void *,
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struct drm_file *);
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extern int nouveau_gem_ioctl_pushbuf(struct drm_device *, void *,
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struct drm_file *);
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extern int nouveau_gem_ioctl_cpu_prep(struct drm_device *, void *,
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struct drm_file *);
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extern int nouveau_gem_ioctl_cpu_fini(struct drm_device *, void *,
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struct drm_file *);
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extern int nouveau_gem_ioctl_info(struct drm_device *, void *,
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struct drm_file *);
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extern int nouveau_gem_prime_pin(struct drm_gem_object *);
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extern void nouveau_gem_prime_unpin(struct drm_gem_object *);
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extern struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *);
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extern struct drm_gem_object *nouveau_gem_prime_import_sg_table(
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struct drm_device *, size_t size, struct sg_table *);
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extern void *nouveau_gem_prime_vmap(struct drm_gem_object *);
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extern void nouveau_gem_prime_vunmap(struct drm_gem_object *, void *);
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#endif
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