On Mon, May 02, 2022 at 09:34:09AM -0700, Matt Roper wrote:
From: Ayaz A Siddiqui <ayaz.siddiqui@xxxxxxxxx>
Bspec: 45101, 72161
Signed-off-by: Ayaz A Siddiqui <ayaz.siddiqui@xxxxxxxxx>
Signed-off-by: Fei Yang <fei.yang@xxxxxxxxx>
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_gt_types.h | 1 +
drivers/gpu/drm/i915/gt/intel_mocs.c | 24 ++++++++++++++++++++-
drivers/gpu/drm/i915/gt/intel_workarounds.c | 13 ++++++++---
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/i915_pci.c | 3 ++-
drivers/gpu/drm/i915/intel_device_info.h | 1 +
6 files changed, 39 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
index b06611c1d4ad..7853ea194ea6 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
@@ -221,6 +221,7 @@ struct intel_gt {
struct {
u8 uc_index;
+ u8 wb_index; /* Only for platforms listed in Bspec: 72161 */
I don't like much writting the bspec in code like this. For commit
message it's acceptable/desired, but for code I think it's not great as
1) it's not something generally available and 2) it will likely get
outdated so one would have to rely on git log/blame to see when this was
actually valid.
} mocs;
struct intel_pxp pxp;
diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c
index c4c37585ae8c..265812589f87 100644
--- a/drivers/gpu/drm/i915/gt/intel_mocs.c
+++ b/drivers/gpu/drm/i915/gt/intel_mocs.c
@@ -23,6 +23,7 @@ struct drm_i915_mocs_table {
unsigned int n_entries;
const struct drm_i915_mocs_entry *table;
u8 uc_index;
+ u8 wb_index; /* Only for platforms listed in Bspec: 72161 */
u8 unused_entries_index;
};
@@ -47,6 +48,7 @@ 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
/* (e)LLC caching options */
/*
@@ -394,6 +396,17 @@ static const struct drm_i915_mocs_entry dg2_mocs_table_g10_ax[] = {
MOCS_ENTRY(3, 0, L3_3_WB | L3_LKUP(1)),
};
+static const struct drm_i915_mocs_entry pvc_mocs_table[] = {
+ /* Error */
+ MOCS_ENTRY(0, 0, L3_3_WB),
+
+ /* UC */
+ MOCS_ENTRY(1, 0, L3_1_UC),
+
+ /* WB */
+ MOCS_ENTRY(2, 0, L3_3_WB),
+};
+
enum {
HAS_GLOBAL_MOCS = BIT(0),
HAS_ENGINE_MOCS = BIT(1),
@@ -423,7 +436,14 @@ 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_DG2(i915)) {
+ if (IS_PONTEVECCHIO(i915)) {
+ table->size = ARRAY_SIZE(pvc_mocs_table);
+ table->table = pvc_mocs_table;
+ table->n_entries = PVC_NUM_MOCS_ENTRIES;
+ table->uc_index = 1;
+ table->wb_index = 2;
+ table->unused_entries_index = 2;
+ } else if (IS_DG2(i915)) {
if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_A0, STEP_B0)) {
table->size = ARRAY_SIZE(dg2_mocs_table_g10_ax);
table->table = dg2_mocs_table_g10_ax;
@@ -622,6 +642,8 @@ void intel_set_mocs_index(struct intel_gt *gt)
get_mocs_settings(gt->i915, &table);
gt->mocs.uc_index = table.uc_index;
+ if (HAS_L3_CCS_READ(gt->i915))
+ gt->mocs.wb_index = table.wb_index;
}
void intel_mocs_init(struct intel_gt *gt)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index a05c4b99b3fb..a656d9c2ca2b 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1994,7 +1994,7 @@ void intel_engine_apply_whitelist(struct intel_engine_cs *engine)
static void
engine_fake_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
{
- u8 mocs;
+ u8 mocs_w, mocs_r;
/*
* RING_CMD_CCTL are need to be programed to un-cached
@@ -2002,11 +2002,18 @@ engine_fake_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
* Streamers on Gen12 onward platforms.
*/
if (GRAPHICS_VER(engine->i915) >= 12) {
- mocs = engine->gt->mocs.uc_index;
+ if (HAS_L3_CCS_READ(engine->i915) &&
+ engine->class == COMPUTE_CLASS)
+ mocs_r = engine->gt->mocs.wb_index;
+ else
+ mocs_r = engine->gt->mocs.uc_index;
shouldn't we add a warning in get_mocs_settings() if HAS_L3_CCS_READ(engine->i915)
and mocs.wb_index is 0 (since index 0 shouldn't really be used in latest
platforms)?
Lucas De Marchi
+
+ mocs_w = engine->gt->mocs.uc_index;
+
wa_masked_field_set(wal,
RING_CMD_CCTL(engine->mmio_base),
CMD_CCTL_MOCS_MASK,
- CMD_CCTL_MOCS_OVERRIDE(mocs, mocs));
+ CMD_CCTL_MOCS_OVERRIDE(mocs_w, mocs_r));
}
}
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2dddc27a1b0e..8c8e7308502b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1369,6 +1369,8 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
#define HAS_LSPCON(dev_priv) (IS_DISPLAY_VER(dev_priv, 9, 10))
+#define HAS_L3_CCS_READ(i915) (INTEL_INFO(i915)->has_l3_ccs_read)
+
/* DPF == dynamic parity feature */
#define HAS_L3_DPF(dev_priv) (INTEL_INFO(dev_priv)->has_l3_dpf)
#define NUM_L3_SLICES(dev_priv) (IS_HSW_GT3(dev_priv) ? \
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 498708b33924..07722cdf63ac 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -1076,7 +1076,8 @@ static const struct intel_device_info ats_m_info = {
#define XE_HPC_FEATURES \
XE_HP_FEATURES, \
- .dma_mask_size = 52
+ .dma_mask_size = 52, \
+ .has_l3_ccs_read = 1
__maybe_unused
static const struct intel_device_info pvc_info = {
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index e7d2cf7d65c8..09e33296157a 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -150,6 +150,7 @@ enum intel_ppgtt_type {
func(has_heci_pxp); \
func(has_heci_gscfi); \
func(has_guc_deprivilege); \
+ func(has_l3_ccs_read); \
func(has_l3_dpf); \
func(has_llc); \
func(has_logical_ring_contexts); \
--
2.35.1
