From: Ben Widawsky <benjamin.widawsky at intel.com>
The cacheability controls have changed, and the bits have been
rearranged in general.
v2: Remove comments for snb/ivb cache leves, that's a separate change.
v3: Resolve conflicts due to patch series reordering.
v4: Rebased on top of Kenneth Graunke's ->pet_encode refactoring.
v5: Removed eLLC bits for separate patch.
In the internal repository this was:
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 66929ea..42262d0 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -33,6 +33,7 @@
/* PPGTT stuff */
#define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0))
+#define HSW_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0x7f0))
#define GEN6_PDE_VALID (1 << 0)
/* gen6+ has bit 11-4 for physical addr bit 39-32 */
@@ -44,6 +45,14 @@
#define GEN6_PTE_CACHE_LLC (2 << 1)
#define GEN6_PTE_CACHE_LLC_MLC (3 << 1)
#define GEN6_PTE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr)
+#define HSW_PTE_ADDR_ENCODE(addr) HSW_GTT_ADDR_ENCODE(addr)
+
+/* Cacheability Control is a 4-bit value. The low three bits are stored in *
+ * bits 3:1 of the PTE, while the fourth bit is stored in bit 11 of the PTE.
+ */
+#define HSW_CACHEABILITY_CONTROL(bits) ((((bits) & 0x7) << 1) | \
+ (((bits) & 0x8) << (11 - 3)))
+#define HSW_WB_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x3)
static gen6_gtt_pte_t gen6_pte_encode(dma_addr_t addr,
enum i915_cache_level level)
@@ -92,10 +101,10 @@ static gen6_gtt_pte_t hsw_pte_encode(dma_addr_t addr,
enum i915_cache_level level)
{
gen6_gtt_pte_t pte = GEN6_PTE_VALID;
- pte |= GEN6_PTE_ADDR_ENCODE(addr);
+ pte |= HSW_PTE_ADDR_ENCODE(addr);
if (level != I915_CACHE_NONE)
- pte |= GEN6_PTE_CACHE_LLC;
+ pte |= HSW_WB_LLC_AGE0;
return pte;
}
--
1.8.3
