Now that we have working partial VMA and faulting support for all objects, including fence support, advertise to userspace that it can take advantage of unlimited GGTT mmaps.
Signed-off-by: Chris Wilson <[email protected]> Reviewed-by: Daniel Vetter <[email protected]> --- drivers/gpu/drm/i915/i915_drv.c | 8 ++++++++ drivers/gpu/drm/i915/i915_gem.c | 3 +++ include/uapi/drm/i915_drm.h | 1 + 3 files changed, 12 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 1d2230f7b749..a3fcd5ed913b 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -355,6 +355,14 @@ static int i915_getparam(struct drm_device *dev, void *data, case I915_PARAM_MIN_EU_IN_POOL: value = INTEL_INFO(dev)->min_eu_in_pool; break; + case I915_PARAM_MMAP_GTT_VERSION: + /* undefined - Objects have to be smaller than aperture, + * all simultaneous users have to fit within the + * available space within the aperture. + * 1 - Objects can be any size, and X,Y or untiled + */ + value = 1; + break; default: DRM_DEBUG("Unknown parameter %d\n", param->param); return -EINVAL; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 04607d4115d6..03db668dd1c5 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1694,6 +1694,9 @@ static unsigned int tile_row_pages(struct drm_i915_gem_object *obj) * from the GTT and/or fence registers to make room. So performance may * suffer if the GTT working set is large or there are few fence registers * left. + * + * The current feature set supported by i915_gem_fault() and thus GTT mmaps + * is exposed via I915_PARAM_MMAP_GTT_VERSION. */ int i915_gem_fault(struct vm_area_struct *area, struct vm_fault *vmf) { diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 5501fe83ed92..03725fe89859 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -387,6 +387,7 @@ typedef struct drm_i915_irq_wait { #define I915_PARAM_HAS_EXEC_SOFTPIN 37 #define I915_PARAM_HAS_POOLED_EU 38 #define I915_PARAM_MIN_EU_IN_POOL 39 +#define I915_PARAM_MMAP_GTT_VERSION 40 typedef struct drm_i915_getparam { __s32 param; -- 2.9.3 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
