Commit d0efbe85 authored by Asbjørn Sloth Tønnesen's avatar Asbjørn Sloth Tønnesen Committed by Andi Shyti
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drm/i915: implement vmap/vunmap GEM object functions 

Implement i915_gem_vmap_object() and i915_gem_vunmap_object(),
based on i915_gem_dmabuf_vmap() and i915_gem_dmabuf_vunmap().

This enables a drm_client to use drm_client_buffer_vmap() and
drm_client_buffer_vunmap() on hardware using the i915 driver.

Tested with a currently out of tree pixelflut drm_client[1] on:
- Lenovo ThinkCentre M720q (CoffeeLake-S GT2 / Intel UHD Graphics 630)
- Dell Wyse N06D - 3030 LT (ValleyView on Intel Celeron N2807 SOC)

[1] XDP->DRM pixelflut: https://labitat.dk/wiki/Pixelflut-XDR



Signed-off-by: default avatarAsbjørn Sloth Tønnesen <asbjorn@asbjorn.st>
Acked-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: default avatarAndi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240629182513.78026-1-asbjorn@asbjorn.st
parent 463c93a1

drivers/gpu/drm/i915/gem/i915_gem_object.c

+26 −0
Original line number Diff line number Diff line
@@ -873,6 +873,30 @@ bool i915_gem_object_needs_ccs_pages(struct drm_i915_gem_object *obj) 
	return lmem_placement;

}



static int i915_gem_vmap_object(struct drm_gem_object *gem_obj,

				struct iosys_map *map)

{

	struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);

	void *vaddr;



	vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);

	if (IS_ERR(vaddr))

		return PTR_ERR(vaddr);



	iosys_map_set_vaddr(map, vaddr);



	return 0;

}



static void i915_gem_vunmap_object(struct drm_gem_object *gem_obj,

				   struct iosys_map *map)

{

	struct drm_i915_gem_object *obj = to_intel_bo(gem_obj);



	i915_gem_object_flush_map(obj);

	i915_gem_object_unpin_map(obj);

}



void i915_gem_init__objects(struct drm_i915_private *i915)

{

	INIT_WORK(&i915->mm.free_work, __i915_gem_free_work);
@@ -896,6 +920,8 @@ static const struct drm_gem_object_funcs i915_gem_object_funcs = { 
	.free = i915_gem_free_object,

	.close = i915_gem_close_object,

	.export = i915_gem_prime_export,

	.vmap = i915_gem_vmap_object,

	.vunmap = i915_gem_vunmap_object,

};



/**