Bit 0: Currently bit used by i915. Ideally only i915 touches it
in a Linux stack.
Bits 1 and 2: A while ago we were using Bit 1 for i915 and bit 2
for the user space, until commit 7130630323c5 ("drm/i915:
Use fallback forcewake if primary ack missing") changed it
to bit 1.
Now we have a situation where PCODE is also using this bit-1
in one case, while it should actually be using the Bit-3.
So, let's redirect users back to bit-2 and mark this 1 as
reserved.
Bit 3: Let's reserve for PCODE.
Bit 4: Let's reserve for PSMI.
Cc: Tilak Tangudu <tilak.tang...@intel.com>
Cc: Mika Kuoppala <mika.kuopp...@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com>
---
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 0a5c2648aaf0..15ceaaace4d9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -1399,8 +1399,11 @@
#define FORCEWAKE_MT_ACK _MMIO(0x130040)
#define FORCEWAKE_ACK_HSW _MMIO(0x130044)
#define FORCEWAKE_ACK_GT_GEN9 _MMIO(0x130044)
-#define FORCEWAKE_KERNEL BIT(0)
-#define FORCEWAKE_USER BIT(1)
+#define FORCEWAKE_KERNEL BIT(0) /* For i915 use only */
+#define FORCEWAKE_RSVD BIT(1)
+#define FORCEWAKE_USER BIT(2)
+#define FORCEWAKE_PCODE BIT(3)
+#define FORCEWAKE_PSMI BIT(4)
#define FORCEWAKE_KERNEL_FALLBACK BIT(15)
#define FORCEWAKE_ACK _MMIO(0x130090)
#define VLV_GTLC_WAKE_CTRL _MMIO(0x130090)
--
2.34.1
