On 13/07/2023 02:34, Matt Atwood wrote:
Wa_14011274333 applies to RKL, ADL-S, ADL-P and TGL. ALlocate buffer
pinned to GGTT and add WA to restore impacted registers.
v2: use correct lineage number, more generically apply workarounds for
all registers impacted, move workaround to gt/intel_workarounds.c
(MattR)
Based off patch by Tilak Tangudu.
Signed-off-by: Matt Atwood <matthew.s.atw...@intel.com>
I applied this patch to drm-tip and as far as I can tell it doesn't fix
the problem of the SAMPLER_MODE register loosing its bit0 programming.
-Lionel
---
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 5 ++
drivers/gpu/drm/i915/gt/intel_rc6.c | 63 +++++++++++++++++++++
drivers/gpu/drm/i915/gt/intel_rc6_types.h | 3 +
drivers/gpu/drm/i915/gt/intel_workarounds.c | 40 +++++++++++++
4 files changed, 111 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 718cb2c80f79e..eaee35ecbc8d3 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -83,6 +83,11 @@
#define MTL_MCR_GROUPID REG_GENMASK(11, 8)
#define MTL_MCR_INSTANCEID REG_GENMASK(3, 0)
+#define CTX_WA_PTR _MMIO(0x2058)
+#define CTX_WA_PTR_ADDR_MASK REG_GENMASK(31,12)
+#define CTX_WA_TYPE_MASK REG_GENMASK(4,3)
+#define CTX_WA_VALID REG_BIT(0)
+
#define IPEIR_I965 _MMIO(0x2064)
#define IPEHR_I965 _MMIO(0x2068)
diff --git a/drivers/gpu/drm/i915/gt/intel_rc6.c b/drivers/gpu/drm/i915/gt/intel_rc6.c
index 58bb1c55294c9..6baa341814da7 100644
--- a/drivers/gpu/drm/i915/gt/intel_rc6.c
+++ b/drivers/gpu/drm/i915/gt/intel_rc6.c
@@ -14,6 +14,7 @@
#include "intel_gt.h"
#include "intel_gt_pm.h"
#include "intel_gt_regs.h"
+#include "intel_gpu_commands.h"
#include "intel_pcode.h"
#include "intel_rc6.h"
@@ -53,6 +54,65 @@ static struct drm_i915_private *rc6_to_i915(struct intel_rc6 *rc)
return rc6_to_gt(rc)->i915;
}
+static int rc6_wa_bb_ctx_init(struct intel_rc6 *rc6)
+{
+ struct drm_i915_private *i915 = rc6_to_i915(rc6);
+ struct intel_gt *gt = rc6_to_gt(rc6);
+ struct drm_i915_gem_object *obj;
+ struct i915_vma *vma;
+ void *batch;
+ struct i915_gem_ww_ctx ww;
+ int err;
+
+ obj = i915_gem_object_create_shmem(i915, PAGE_SIZE);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ vma = i915_vma_instance(obj, >->ggtt->vm, NULL);
+ if (IS_ERR(vma)){
+ err = PTR_ERR(vma);
+ goto err;
+ }
+ rc6->vma=vma;
+ i915_gem_ww_ctx_init(&ww, true);
+retry:
+ err = i915_gem_object_lock(obj, &ww);
+ if (!err)
+ err = i915_ggtt_pin(rc6->vma, &ww, 0, PIN_HIGH);
+ if (err)
+ goto err_ww_fini;
+
+ batch = i915_gem_object_pin_map(obj, I915_MAP_WB);
+ if (IS_ERR(batch)) {
+ err = PTR_ERR(batch);
+ goto err_unpin;
+ }
+ rc6->rc6_wa_bb = batch;
+ return 0;
+err_unpin:
+ if (err)
+ i915_vma_unpin(rc6->vma);
+err_ww_fini:
+ if (err == -EDEADLK) {
+ err = i915_gem_ww_ctx_backoff(&ww);
+ if (!err)
+ goto retry;
+ }
+ i915_gem_ww_ctx_fini(&ww);
+
+ if (err)
+ i915_vma_put(rc6->vma);
+err:
+ i915_gem_object_put(obj);
+ return err;
+}
+
+void rc6_wa_bb_ctx_wa_fini(struct intel_rc6 *rc6)
+{
+ i915_vma_unpin(rc6->vma);
+ i915_vma_put(rc6->vma);
+}
+
static void gen11_rc6_enable(struct intel_rc6 *rc6)
{
struct intel_gt *gt = rc6_to_gt(rc6);
@@ -616,6 +676,9 @@ void intel_rc6_init(struct intel_rc6 *rc6)
err = chv_rc6_init(rc6);
else if (IS_VALLEYVIEW(i915))
err = vlv_rc6_init(rc6);
+ else if ((GRAPHICS_VER_FULL(i915) >= IP_VER(12, 0)) &&
+ (GRAPHICS_VER_FULL(i915) <= IP_VER(12, 70)))
+ err = rc6_wa_bb_ctx_init(rc6);
else
err = 0;
diff --git a/drivers/gpu/drm/i915/gt/intel_rc6_types.h b/drivers/gpu/drm/i915/gt/intel_rc6_types.h
index cd4587098162a..643fd4e839ad4 100644
--- a/drivers/gpu/drm/i915/gt/intel_rc6_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_rc6_types.h
@@ -33,6 +33,9 @@ struct intel_rc6 {
struct drm_i915_gem_object *pctx;
+ u32 *rc6_wa_bb;
+ struct i915_vma *vma;
+
bool supported : 1;
bool enabled : 1;
bool manual : 1;
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c
b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 4d2dece960115..d20afb318d857 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -14,6 +14,7 @@
#include "intel_gt_regs.h"
#include "intel_ring.h"
#include "intel_workarounds.h"
+#include "intel_rc6.h"
/**
* DOC: Hardware workarounds
@@ -3132,6 +3133,41 @@ general_render_compute_wa_init(struct intel_engine_cs
*engine, struct i915_wa_li
true);
}
+static void
+populate_wa_bb_ctx(struct intel_engine_cs *engine, struct i915_wa_list *wal)
+{
+ struct intel_rc6 *rc6 = &engine->gt->rc6;
+ struct intel_uncore *uncore = engine->gt->uncore;
+ const struct i915_wa *wa;
+ int i;
+ u32 *rc6_wa_bb;
+
+ if (!rc6->vma->obj) return;
+
+ rc6_wa_bb = rc6->rc6_wa_bb;
+ for (i = 0, wa = wal->list; i < wal->count; i++, wa++) {
+ if (i915_mmio_reg_offset(wa->mcr_reg) ==
+ i915_mmio_reg_offset(GEN8_HALF_SLICE_CHICKEN1) ||
+ ((i915_mmio_reg_offset(wa->mcr_reg) >=
+ i915_mmio_reg_offset(HALF_SLICE_CHICKEN2)) &&
+ (i915_mmio_reg_offset(wa->mcr_reg) <=
+ i915_mmio_reg_offset(GEN9_HALF_SLICE_CHICKEN7)))) {
Guessing this is where SAMPLER_MODE is missing.
+ *rc6_wa_bb++ = MI_NOOP;
+ *rc6_wa_bb++ = MI_LOAD_REGISTER_IMM(1);
+ *rc6_wa_bb++ = i915_mmio_reg_offset(wa->mcr_reg);
+ *rc6_wa_bb++ = wa->set;
+ *rc6_wa_bb++ = MI_NOOP;
+ }
+ }
+ *rc6_wa_bb++ = MI_BATCH_BUFFER_END;
+
+ i915_gem_object_flush_map(rc6->vma->obj);
+ intel_uncore_write(uncore, CTX_WA_PTR,
+ REG_FIELD_PREP(CTX_WA_PTR_ADDR_MASK,
+ i915_vma_offset(rc6->vma) &
GENMASK(19, 0)) |
+ CTX_WA_VALID);
+}
+
static void
engine_init_workarounds(struct intel_engine_cs *engine, struct i915_wa_list
*wal)
{
@@ -3154,6 +3190,10 @@ engine_init_workarounds(struct intel_engine_cs *engine,
struct i915_wa_list *wal
rcs_engine_wa_init(engine, wal);
else
xcs_engine_wa_init(engine, wal);
+
+ if ((GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 0)) &&
+ (GRAPHICS_VER_FULL(engine->i915) <= IP_VER(12, 70)))
+ populate_wa_bb_ctx(engine, wal);
}
void intel_engine_init_workarounds(struct intel_engine_cs *engine)
