[Intel-gfx] [PATCH v12 3/6] drm/i915: Add support to return CNL specific reserved WOPCM size

[Jackie Li]

CNL has its specific reserved GuC WOPCM size for RC6 and other hardware
contexts.

This patch updates the code to return CNL specific reserved GuC WOPCM size
for RC6 and other hardware contexts so that the GuC WOPCM size can be
calculated correctly for CNL.

v9:
 - Created a new patch for these changes originally made in v8 4/6 patch of
   this series (Sagar/Michal)

v10:
 - Used if-else ladder to the returning of context sizes (Joonas)

v11:
 - Removed GUC_ prefix from context size macro (Michal)

Bspec: 12690

Cc: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com> (v9)
Signed-off-by: Jackie Li <yaodong.li at intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko at intel.com> (v11)
---
 drivers/gpu/drm/i915/intel_wopcm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_wopcm.c b/drivers/gpu/drm/i915/intel_wopcm.c
index 8b2f177..237ca03 100644
--- a/drivers/gpu/drm/i915/intel_wopcm.c
+++ b/drivers/gpu/drm/i915/intel_wopcm.c
@@ -54,6 +54,8 @@
 
 /* 24KB at the end of WOPCM is reserved for RC6 CTX on BXT. */
 #define BXT_WOPCM_RC6_CTX_RESERVED	(24 * 1024)
+/* 36KB WOPCM reserved at the end of WOPCM on CNL. */
+#define CNL_WOPCM_HW_CTX_RESERVED	(36 * 1024)
 
 /* 128KB from GUC_WOPCM_RESERVED is reserved for FW on Gen9. */
 #define GEN9_GUC_FW_RESERVED	(128 * 1024)
@@ -76,6 +78,8 @@ static inline u32 context_reserved_size(struct drm_i915_private *i915)
 {
 	if (IS_GEN9_LP(i915))
 		return BXT_WOPCM_RC6_CTX_RESERVED;
+	else if (INTEL_GEN(i915) >= 10)
+		return CNL_WOPCM_HW_CTX_RESERVED;
 	else
 		return 0;
 }
-- 
2.7.4