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drm/i915: implement vmap/vunmap GEM object functions

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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: Asbjørn Sloth Tønnesen <asbjorn@asbjorn.st>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240629182513.78026-1-asbjorn@asbjorn.st
This commit is contained in:
Asbjørn Sloth Tønnesen
2024-06-29 18:25:06 +00:00
committed by Andi Shyti
parent 463c93a18c
commit d0efbe85e1
1 changed files with 26 additions and 0 deletions
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26
drivers/gpu/drm/i915/gem/i915_gem_object.c
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@@ -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,
};
/**