drm/i915/guc: Add GuC ADS (Addition Data Structure) - allocation
The GuC firmware uses this for various purposes. The ADS itself is
a chunk of memory created by driver to share with GuC. Its members
are usually addresses telling where GuC to access them, including
things like scheduler policies, register list that will be saved
and restored during reset etc.
This is the first patch of a series to enable GuC ADS. For now, we
only create the ADS obj whilst keep it disabled.
v1: remove dead code checking return of kmap_atomic (Chris Wilson)
v2: use kmap instead of the atomic version of it.
Signed-off-by: Alex Dai <yu.dai@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450468812-4882-3-git-send-email-yu.dai@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index 8b00f461..7e6c527 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -839,6 +839,46 @@
guc->log_flags = (offset << GUC_LOG_BUF_ADDR_SHIFT) | flags;
}
+static void guc_create_ads(struct intel_guc *guc)
+{
+ struct drm_i915_private *dev_priv = guc_to_i915(guc);
+ struct drm_i915_gem_object *obj;
+ struct guc_ads *ads;
+ struct intel_engine_cs *ring;
+ struct page *page;
+ u32 size, i;
+
+ /* The ads obj includes the struct itself and buffers passed to GuC */
+ size = sizeof(struct guc_ads);
+
+ obj = guc->ads_obj;
+ if (!obj) {
+ obj = gem_allocate_guc_obj(dev_priv->dev, PAGE_ALIGN(size));
+ if (!obj)
+ return;
+
+ guc->ads_obj = obj;
+ }
+
+ page = i915_gem_object_get_page(obj, 0);
+ ads = kmap(page);
+
+ /*
+ * The GuC requires a "Golden Context" when it reinitialises
+ * engines after a reset. Here we use the Render ring default
+ * context, which must already exist and be pinned in the GGTT,
+ * so its address won't change after we've told the GuC where
+ * to find it.
+ */
+ ring = &dev_priv->ring[RCS];
+ ads->golden_context_lrca = ring->status_page.gfx_addr;
+
+ for_each_ring(ring, dev_priv, i)
+ ads->eng_state_size[i] = intel_lr_context_size(ring);
+
+ kunmap(page);
+}
+
/*
* Set up the memory resources to be shared with the GuC. At this point,
* we require just one object that can be mapped through the GGTT.
@@ -865,6 +905,8 @@
guc_create_log(guc);
+ guc_create_ads(guc);
+
return 0;
}
@@ -903,6 +945,9 @@
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_guc *guc = &dev_priv->guc;
+ gem_release_guc_obj(dev_priv->guc.ads_obj);
+ guc->ads_obj = NULL;
+
gem_release_guc_obj(dev_priv->guc.log_obj);
guc->log_obj = NULL;