From 6d26d9bbf59a01ac99488252356348ae066a2c38 Mon Sep 17 00:00:00 2001
From: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Date: Sat, 17 Aug 2019 02:38:50 -0700
Subject: drm/i915/tgl: add GEN12_MAX_CONTEXT_HW_ID
Git-commit: 6d26d9bbf59a01ac99488252356348ae066a2c38
Patch-mainline: v5.4-rc1
References: bsc#1152489
Like Gen11, Gen12 has 11 available bits for the ctx id field. However,
the last value (0x7FF) is reserved to indicate engine idle, so we
need to reduce the maximum number of contexts by 1 compared to Gen11.
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190817093902.2171-29-lucas.demarchi@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/gem/i915_gem_context.c | 4 +++-
drivers/gpu/drm/i915/i915_drv.h | 2 ++
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index cd1fd2e5423a..1cdfe05514c3 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -173,7 +173,9 @@ static inline int new_hw_id(struct drm_i915_private *i915, gfp_t gfp)
lockdep_assert_held(&i915->contexts.mutex);
- if (INTEL_GEN(i915) >= 11)
+ if (INTEL_GEN(i915) >= 12)
+ max = GEN12_MAX_CONTEXT_HW_ID;
+ else if (INTEL_GEN(i915) >= 11)
max = GEN11_MAX_CONTEXT_HW_ID;
else if (USES_GUC_SUBMISSION(i915))
/*
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 63682cb3658a..c69a2f495f9d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1602,6 +1602,8 @@ struct drm_i915_private {
#define MAX_CONTEXT_HW_ID (1<<21) /* exclusive */
#define MAX_GUC_CONTEXT_HW_ID (1 << 20) /* exclusive */
#define GEN11_MAX_CONTEXT_HW_ID (1<<11) /* exclusive */
+/* in Gen12 ID 0x7FF is reserved to indicate idle */
+#define GEN12_MAX_CONTEXT_HW_ID (GEN11_MAX_CONTEXT_HW_ID - 1)
struct list_head hw_id_list;
} contexts;
--
2.28.0