commit e57344d7e4ec upstream, backported to v5.4
We checked the table size against a hardcoded number of entries, and
that number was excluding the special mocs registers at the end.
Fixes: 977933b5da7c ("drm/i915/gt: Program mocs:63 for cache eviction on gen9")
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v4.3+
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20201127102540.13117-1-chris@xxxxxxxxxxxxxxxxxx
(cherry picked from commit 444fbf5d7058099447c5366ba8bb60d610aeb44b)
---
drivers/gpu/drm/i915/gt/intel_mocs.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c
index e97a2aa31485..7de6528e8df4 100644
--- a/drivers/gpu/drm/i915/gt/intel_mocs.c
+++ b/drivers/gpu/drm/i915/gt/intel_mocs.c
@@ -58,8 +58,7 @@ struct drm_i915_mocs_table {
#define _L3_CACHEABILITY(value) ((value) << 4)
/* Helper defines */
-#define GEN9_NUM_MOCS_ENTRIES 62 /* 62 out of 64 - 63 & 64 are reserved. */
-#define GEN11_NUM_MOCS_ENTRIES 64 /* 63-64 are reserved, but configured. */
+#define GEN9_NUM_MOCS_ENTRIES 64 /* 63-64 are reserved, but configured. */
/* (e)LLC caching options */
/*
@@ -300,12 +299,12 @@ static bool get_mocs_settings(struct intel_gt *gt,
if (INTEL_GEN(i915) >= 12) {
table->size = ARRAY_SIZE(tigerlake_mocs_table);
table->table = tigerlake_mocs_table;
- table->n_entries = GEN11_NUM_MOCS_ENTRIES;
+ table->n_entries = GEN9_NUM_MOCS_ENTRIES;
result = true;
} else if (IS_GEN(i915, 11)) {
table->size = ARRAY_SIZE(icelake_mocs_table);
table->table = icelake_mocs_table;
- table->n_entries = GEN11_NUM_MOCS_ENTRIES;
+ table->n_entries = GEN9_NUM_MOCS_ENTRIES;
result = true;
} else if (IS_GEN9_BC(i915) || IS_CANNONLAKE(i915)) {
table->size = ARRAY_SIZE(skylake_mocs_table);
--
2.30.0
