[Intel-gfx] [PATCH 1/3] drm/i915/mtl: Define MOCS and PAT tables for MTL
Aravind Iddamsetty
aravind.iddamsetty at intel.com
Mon Nov 28 10:13:50 UTC 2022
From: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep at intel.com>
On MTL due to the introduction of L4 cache, coherency and cacheability
selections are different and also GT can no longer allocate on LLC. The
MOCS/PAT tables needs an update.
BSpec: 44509, 45101, 44235
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep at intel.com>
Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty at intel.com>
---
drivers/gpu/drm/i915/gt/intel_gtt.c | 23 +++++++-
drivers/gpu/drm/i915/gt/intel_gtt.h | 9 +++
drivers/gpu/drm/i915/gt/intel_mocs.c | 76 +++++++++++++++++++++++--
drivers/gpu/drm/i915/gt/selftest_mocs.c | 2 +-
drivers/gpu/drm/i915/i915_pci.c | 1 +
5 files changed, 105 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
index 2ba3983984b9..41248029d03d 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
@@ -467,6 +467,25 @@ void gtt_write_workarounds(struct intel_gt *gt)
}
}
+static void mtl_setup_private_ppat(struct intel_uncore *uncore)
+{
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(0),
+ MTL_PPAT_L4_0_WB);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(1),
+ MTL_PPAT_L4_1_WT | MTL_2_COH_1W);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(2),
+ MTL_PPAT_L4_3_UC | MTL_2_COH_1W);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(3),
+ MTL_PPAT_L4_0_WB | MTL_2_COH_1W);
+ intel_uncore_write(uncore, GEN12_PAT_INDEX(4),
+ MTL_PPAT_L4_0_WB | MTL_3_COH_2W);
+
+ /*
+ * Remaining PAT entries are left at the hardware-default
+ * fully-cached setting
+ */
+}
+
static void tgl_setup_private_ppat(struct intel_uncore *uncore)
{
/* TGL doesn't support LLC or AGE settings */
@@ -591,7 +610,9 @@ void setup_private_pat(struct intel_gt *gt)
GEM_BUG_ON(GRAPHICS_VER(i915) < 8);
- if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
+ if (IS_METEORLAKE(i915))
+ mtl_setup_private_ppat(uncore);
+ else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
xehp_setup_private_ppat(gt);
else if (GRAPHICS_VER(i915) >= 12)
tgl_setup_private_ppat(uncore);
diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
index 4d75ba4bb41d..43bf9188ffef 100644
--- a/drivers/gpu/drm/i915/gt/intel_gtt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
@@ -147,6 +147,15 @@ typedef u64 gen8_pte_t;
#define GEN8_PDE_IPS_64K BIT(11)
#define GEN8_PDE_PS_2M BIT(7)
+#define MTL_PPAT_L4_CACHE_POLICY_MASK REG_GENMASK(3, 2)
+#define MTL_PAT_INDEX_COH_MODE_MASK REG_GENMASK(1, 0)
+#define MTL_PPAT_L4_3_UC REG_FIELD_PREP(MTL_PPAT_L4_CACHE_POLICY_MASK, 3)
+#define MTL_PPAT_L4_1_WT REG_FIELD_PREP(MTL_PPAT_L4_CACHE_POLICY_MASK, 1)
+#define MTL_PPAT_L4_0_WB REG_FIELD_PREP(MTL_PPAT_L4_CACHE_POLICY_MASK, 0)
+#define MTL_3_COH_2W REG_FIELD_PREP(MTL_PAT_INDEX_COH_MODE_MASK, 3)
+#define MTL_2_COH_1W REG_FIELD_PREP(MTL_PAT_INDEX_COH_MODE_MASK, 2)
+#define MTL_0_COH_NON REG_FIELD_PREP(MTL_PAT_INDEX_COH_MODE_MASK, 0)
+
enum i915_cache_level;
struct drm_i915_gem_object;
diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c
index 49fdd509527a..27de7f57ff3d 100644
--- a/drivers/gpu/drm/i915/gt/intel_mocs.c
+++ b/drivers/gpu/drm/i915/gt/intel_mocs.c
@@ -40,6 +40,10 @@ struct drm_i915_mocs_table {
#define LE_COS(value) ((value) << 15)
#define LE_SSE(value) ((value) << 17)
+/* Defines for the tables (GLOB_MOCS_0 - GLOB_MOCS_16) */
+#define _L4_CACHEABILITY(value) ((value) << 2)
+#define IG_PAT(value) ((value) << 8)
+
/* Defines for the tables (LNCFMOCS0 - LNCFMOCS31) - two entries per word */
#define L3_ESC(value) ((value) << 0)
#define L3_SCC(value) ((value) << 1)
@@ -50,6 +54,7 @@ struct drm_i915_mocs_table {
/* Helper defines */
#define GEN9_NUM_MOCS_ENTRIES 64 /* 63-64 are reserved, but configured. */
#define PVC_NUM_MOCS_ENTRIES 3
+#define MTL_NUM_MOCS_ENTRIES 16
/* (e)LLC caching options */
/*
@@ -73,6 +78,12 @@ struct drm_i915_mocs_table {
#define L3_2_RESERVED _L3_CACHEABILITY(2)
#define L3_3_WB _L3_CACHEABILITY(3)
+/* L4 caching options */
+#define L4_0_WB _L4_CACHEABILITY(0)
+#define L4_1_WT _L4_CACHEABILITY(1)
+#define L4_2_RESERVED _L4_CACHEABILITY(2)
+#define L4_3_UC _L4_CACHEABILITY(3)
+
#define MOCS_ENTRY(__idx, __control_value, __l3cc_value) \
[__idx] = { \
.control_value = __control_value, \
@@ -416,6 +427,57 @@ static const struct drm_i915_mocs_entry pvc_mocs_table[] = {
MOCS_ENTRY(2, 0, L3_3_WB),
};
+static const struct drm_i915_mocs_entry mtl_mocs_table[] = {
+ /* Error - Reserved for Non-Use */
+ MOCS_ENTRY(0,
+ IG_PAT(0),
+ L3_LKUP(1) | L3_3_WB),
+ /* Cached - L3 + L4 */
+ MOCS_ENTRY(1,
+ IG_PAT(1),
+ L3_LKUP(1) | L3_3_WB),
+ /* L4 - GO:L3 */
+ MOCS_ENTRY(2,
+ IG_PAT(1),
+ L3_LKUP(1) | L3_1_UC),
+ /* Uncached - GO:L3 */
+ MOCS_ENTRY(3,
+ IG_PAT(1) | L4_3_UC,
+ L3_LKUP(1) | L3_1_UC),
+ /* L4 - GO:Mem */
+ MOCS_ENTRY(4,
+ IG_PAT(1),
+ L3_LKUP(1) | L3_GLBGO(1) | L3_1_UC),
+ /* Uncached - GO:Mem */
+ MOCS_ENTRY(5,
+ IG_PAT(1) | L4_3_UC,
+ L3_LKUP(1) | L3_GLBGO(1) | L3_1_UC),
+ /* L4 - L3:NoLKUP; GO:L3 */
+ MOCS_ENTRY(6,
+ IG_PAT(1),
+ L3_1_UC),
+ /* Uncached - L3:NoLKUP; GO:L3 */
+ MOCS_ENTRY(7,
+ IG_PAT(1) | L4_3_UC,
+ L3_1_UC),
+ /* L4 - L3:NoLKUP; GO:Mem */
+ MOCS_ENTRY(8,
+ IG_PAT(1),
+ L3_GLBGO(1) | L3_1_UC),
+ /* Uncached - L3:NoLKUP; GO:Mem */
+ MOCS_ENTRY(9,
+ IG_PAT(1) | L4_3_UC,
+ L3_GLBGO(1) | L3_1_UC),
+ /* Display - L3; L4:WT */
+ MOCS_ENTRY(14,
+ IG_PAT(1) | L4_1_WT,
+ L3_LKUP(1) | L3_3_WB),
+ /* CCS - Non-Displayable */
+ MOCS_ENTRY(15,
+ IG_PAT(1),
+ L3_GLBGO(1) | L3_1_UC),
+};
+
enum {
HAS_GLOBAL_MOCS = BIT(0),
HAS_ENGINE_MOCS = BIT(1),
@@ -445,7 +507,13 @@ static unsigned int get_mocs_settings(const struct drm_i915_private *i915,
memset(table, 0, sizeof(struct drm_i915_mocs_table));
table->unused_entries_index = I915_MOCS_PTE;
- if (IS_PONTEVECCHIO(i915)) {
+ if (IS_METEORLAKE(i915)) {
+ table->size = ARRAY_SIZE(mtl_mocs_table);
+ table->table = mtl_mocs_table;
+ table->n_entries = MTL_NUM_MOCS_ENTRIES;
+ table->uc_index = 9;
+ table->unused_entries_index = 1;
+ } else if (IS_PONTEVECCHIO(i915)) {
table->size = ARRAY_SIZE(pvc_mocs_table);
table->table = pvc_mocs_table;
table->n_entries = PVC_NUM_MOCS_ENTRIES;
@@ -643,9 +711,9 @@ void intel_mocs_init_engine(struct intel_engine_cs *engine)
init_l3cc_table(engine->gt, &table);
}
-static u32 global_mocs_offset(void)
+static u32 global_mocs_offset(struct intel_gt *gt)
{
- return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0));
+ return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0)) + gt->uncore->gsi_offset;
}
void intel_set_mocs_index(struct intel_gt *gt)
@@ -668,7 +736,7 @@ void intel_mocs_init(struct intel_gt *gt)
*/
flags = get_mocs_settings(gt->i915, &table);
if (flags & HAS_GLOBAL_MOCS)
- __init_mocs_table(gt->uncore, &table, global_mocs_offset());
+ __init_mocs_table(gt->uncore, &table, global_mocs_offset(gt));
/*
* Initialize the L3CC table as part of mocs initalization to make
diff --git a/drivers/gpu/drm/i915/gt/selftest_mocs.c b/drivers/gpu/drm/i915/gt/selftest_mocs.c
index f27cc28608d4..66b3c6fcf1f1 100644
--- a/drivers/gpu/drm/i915/gt/selftest_mocs.c
+++ b/drivers/gpu/drm/i915/gt/selftest_mocs.c
@@ -137,7 +137,7 @@ static int read_mocs_table(struct i915_request *rq,
return 0;
if (HAS_GLOBAL_MOCS_REGISTERS(rq->engine->i915))
- addr = global_mocs_offset();
+ addr = global_mocs_offset(rq->engine->gt);
else
addr = mocs_offset(rq->engine);
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 414b4bfd514b..8e872cb89169 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -1147,6 +1147,7 @@ static const struct intel_device_info mtl_info = {
.has_flat_ccs = 0,
.has_gmd_id = 1,
.has_guc_deprivilege = 1,
+ .has_llc = 0,
.has_mslice_steering = 0,
.has_snoop = 1,
.__runtime.memory_regions = REGION_SMEM | REGION_STOLEN_LMEM,
--
2.25.1
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