GuC and HuC depend on struct_mutex for device
reinitialization. Moving away from this dependency
requires perma-pinning the firmware images in GGTT.
The upper portion of the GuC address space has
a sizeable hole (several MB) that is inaccessible
by GuC. Reserve this range within GGTT as it can
comfortably hold GuC/HuC firmware images.
v2: Reserve node rather than insert (Chris)
Simpler determination of node start/size (Daniele)
Move reserve/release out to intel_guc.* files
Signed-off-by: Fernando Pacheco <fernando.pacheco@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 25 ++++++++--------
drivers/gpu/drm/i915/i915_gem_gtt.h | 1 +
drivers/gpu/drm/i915/intel_guc.c | 45 +++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_guc.h | 2 ++
4 files changed, 60 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 8f460cc4cc1f..0b4c22e68574 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2752,6 +2752,12 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
if (ret)
return ret;
+ if (USES_GUC(dev_priv)) {
+ ret = intel_guc_reserve_ggtt_top(&dev_priv->guc);
+ if (ret)
+ goto err_reserve;
+ }
+
/* Clear any non-preallocated blocks */
drm_mm_for_each_hole(entry, &ggtt->vm.mm, hole_start, hole_end) {
DRM_DEBUG_KMS("clearing unused GTT space: [%lx, %lx]\n",
@@ -2766,12 +2772,14 @@ int i915_gem_init_ggtt(struct drm_i915_private *dev_priv)
if (INTEL_PPGTT(dev_priv) == INTEL_PPGTT_ALIASING) {
ret = i915_gem_init_aliasing_ppgtt(dev_priv);
if (ret)
- goto err;
+ goto err_appgtt;
}
return 0;
-err:
+err_appgtt:
+ intel_guc_release_ggtt_top(&dev_priv->guc);
+err_reserve:
drm_mm_remove_node(&ggtt->error_capture);
return ret;
}
@@ -2797,6 +2805,8 @@ void i915_ggtt_cleanup_hw(struct drm_i915_private *dev_priv)
if (drm_mm_node_allocated(&ggtt->error_capture))
drm_mm_remove_node(&ggtt->error_capture);
+ intel_guc_release_ggtt_top(&dev_priv->guc);
+
if (drm_mm_initialized(&ggtt->vm.mm)) {
intel_vgt_deballoon(dev_priv);
i915_address_space_fini(&ggtt->vm);
@@ -3369,17 +3379,6 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
if (ret)
return ret;
- /* Trim the GGTT to fit the GuC mappable upper range (when enabled).
- * This is easier than doing range restriction on the fly, as we
- * currently don't have any bits spare to pass in this upper
- * restriction!
- */
- if (USES_GUC(dev_priv)) {
- ggtt->vm.total = min_t(u64, ggtt->vm.total, GUC_GGTT_TOP);
- ggtt->mappable_end =
- min_t(u64, ggtt->mappable_end, ggtt->vm.total);
- }
-
if ((ggtt->vm.total - 1) >> 32) {
DRM_ERROR("We never expected a Global GTT with more than 32bits"
" of address space! Found %lldM!\n",
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index f597f35b109b..b51e779732c3 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -384,6 +384,7 @@ struct i915_ggtt {
u32 pin_bias;
struct drm_mm_node error_capture;
+ struct drm_mm_node uc_fw;
};
struct i915_hw_ppgtt {
diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index d81a02b0f525..ddd246dc3f14 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -721,3 +721,48 @@ u32 intel_guc_reserved_gtt_size(struct intel_guc *guc)
{
return guc_to_i915(guc)->wopcm.guc.size;
}
+
+static u32 __intel_guc_ggtt_top_offset(struct intel_guc *guc)
+{
+ struct drm_i915_private *i915 = guc_to_i915(guc);
+ struct i915_ggtt *ggtt = &i915->ggtt;
+ struct intel_huc *huc = &i915->huc;
+ u32 guc_fw_size, huc_fw_size;
+ u32 min_reserved_size;
+
+ guc_fw_size = round_up(guc->fw.size, I915_GTT_PAGE_SIZE);
+ huc_fw_size = round_up(huc->fw.size, I915_GTT_PAGE_SIZE);
+
+ min_reserved_size = guc_fw_size + huc_fw_size;
+
+ return min_t(u32, GUC_GGTT_TOP, ggtt->vm.total - min_reserved_size);
+}
+
+int intel_guc_reserve_ggtt_top(struct intel_guc *guc)
+{
+ struct drm_i915_private *i915 = guc_to_i915(guc);
+ struct i915_ggtt *ggtt = &i915->ggtt;
+ u64 start, size;
+ int ret;
+
+ start = __intel_guc_ggtt_top_offset(guc);
+ size = ggtt->vm.total - start;
+
+ ret = i915_gem_gtt_reserve(&ggtt->vm, &ggtt->uc_fw, size,
+ start, I915_COLOR_UNEVICTABLE,
+ PIN_NOEVICT);
+
+ if (ret)
+ DRM_DEBUG_DRIVER("GuC: failed to reserve top of ggtt\n");
+
+ return ret;
+}
+
+void intel_guc_release_ggtt_top(struct intel_guc *guc)
+{
+ struct drm_i915_private *i915 = guc_to_i915(guc);
+ struct i915_ggtt *ggtt = &i915->ggtt;
+
+ if (drm_mm_node_allocated(&ggtt->uc_fw))
+ drm_mm_remove_node(&ggtt->uc_fw);
+}
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index 2c59ff8d9f39..2494e84831a2 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -173,6 +173,8 @@ int intel_guc_suspend(struct intel_guc *guc);
int intel_guc_resume(struct intel_guc *guc);
struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size);
u32 intel_guc_reserved_gtt_size(struct intel_guc *guc);
+int intel_guc_reserve_ggtt_top(struct intel_guc *guc);
+void intel_guc_release_ggtt_top(struct intel_guc *guc);
static inline int intel_guc_sanitize(struct intel_guc *guc)
{
--
2.21.0
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