To enable 1G pages we set the PS bit in the PDPE, aka PDPE[7] to
indicate a 1G page, and not a PD.
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 47 +++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_gem_gtt.h | 2 ++
2 files changed, 49 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 3dadb501daa6..e81c78ffbea5 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -854,6 +854,50 @@ static __always_inline struct gen8_insert_pte gen8_insert_pte(u64 start)
}
static __always_inline bool
+gen8_ppgtt_insert_1G_pdpe_entries(struct i915_hw_ppgtt *ppgtt,
+ struct i915_page_directory_pointer *pdp,
+ struct sgt_dma *iter,
+ struct gen8_insert_pte *idx,
+ enum i915_cache_level cache_level)
+{
+ const gen8_pte_t pdpe_encode = gen8_pte_encode(GEN8_PDPE_PS_1G,
+ cache_level);
+ gen8_pte_t *vaddr;
+ bool ret;
+
+ GEM_BUG_ON(idx->pte);
+ GEM_BUG_ON(idx->pde);
+ GEM_BUG_ON(idx->pdpe >= i915_pdpes_per_pdp(&ppgtt->base));
+ vaddr = kmap_atomic_px(pdp);
+ do {
+ vaddr[idx->pdpe] = pdpe_encode | iter->dma;
+ iter->dma += I915_GTT_PAGE_SIZE_1G;
+ if (iter->dma >= iter->max) {
+ iter->sg = __sg_next(iter->sg);
+ if (!iter->sg) {
+ ret = false;
+ break;
+ }
+
+ iter->dma = sg_dma_address(iter->sg);
+ iter->max = iter->dma + iter->sg->length;
+ }
+
+ if (++idx->pdpe == GEN8_PML4ES_PER_PML4) {
+ idx->pdpe = 0;
+ ret = true;
+ break;
+ }
+
+ } while (1);
+ kunmap_atomic(vaddr);
+
+ mark_tlbs_dirty(ppgtt);
+
+ return ret;
+}
+
+static __always_inline bool
gen8_ppgtt_insert_2M_pde_entries(struct i915_hw_ppgtt *ppgtt,
struct i915_page_directory_pointer *pdp,
struct sgt_dma *iter,
@@ -1081,6 +1125,9 @@ static void gen8_ppgtt_insert_4lvl(struct i915_address_space *vm,
case I915_GTT_PAGE_SIZE_2M:
insert_entries = gen8_ppgtt_insert_2M_pde_entries;
break;
+ case I915_GTT_PAGE_SIZE_1G:
+ insert_entries = gen8_ppgtt_insert_1G_pdpe_entries;
+ break;
default:
MISSING_CASE(page_size);
return;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 840d08be8fa3..1517cfdbd5ce 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -152,6 +152,8 @@ typedef u64 gen8_ppgtt_pml4e_t;
#define GEN8_PDE_IPS_64K BIT(11)
#define GEN8_PDE_PS_2M BIT(7)
+#define GEN8_PDPE_PS_1G BIT(7)
+
struct sg_table;
struct intel_rotation_info {
--
2.9.4
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