On Tue, Apr 25, 2023 at 11:30:11AM -0700, Radhakrishna Sripada wrote:
Enable strict RAR to prevent spurious GPU hangs.
v1.1: Rebase
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_gt_regs.h | 5 +++++
drivers/gpu/drm/i915/gt/intel_workarounds.c | 4 ++++
drivers/gpu/drm/i915/i915_perf_oa_regs.h | 4 ----
3 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index e8c3b762a92a..af80d2fe739b 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -529,6 +529,11 @@
#define GEN8_RC6_CTX_INFO _MMIO(0x8504)
+#define GEN12_SQCNT1 _MMIO(0x8718)
+#define GEN12_SQCNT1_PMON_ENABLE REG_BIT(30)
+#define GEN12_SQCNT1_OABPC REG_BIT(29)
+#define GEN12_STRICT_RAR_ENABLE REG_BIT(23)
+
#define XEHP_SQCM MCR_REG(0x8724)
#define EN_32B_ACCESS REG_BIT(30)
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index de4f8e2e8e8c..ad9e7f49a6fa 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1699,6 +1699,9 @@ xelpg_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
wa_mcr_write_or(wal, RENDER_MOD_CTRL, FORCE_MISS_FTLB);
wa_mcr_write_or(wal, COMP_MOD_CTRL, FORCE_MISS_FTLB);
+ /* Wa_14019141245 */
+ wa_write_or(wal, GEN12_SQCNT1, GEN12_STRICT_RAR_ENABLE);
+
Was wondering if this should be a rmw, but since this write is at driver
probe and OA always does a rmw on this register, this looks fine.
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Thanks,
Umesh
if (IS_MTL_GRAPHICS_STEP(gt->i915, M, STEP_A0, STEP_B0) ||
IS_MTL_GRAPHICS_STEP(gt->i915, P, STEP_A0, STEP_B0)) {
/* Wa_14014830051 */
@@ -1707,6 +1710,7 @@ xelpg_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
/* Wa_14015795083 */
wa_write_clr(wal, GEN7_MISCCPCTL, GEN12_DOP_CLOCK_GATE_RENDER_ENABLE);
}
+
/*
* Unlike older platforms, we no longer setup implicit steering here;
* all MCR accesses are explicitly steered.
diff --git a/drivers/gpu/drm/i915/i915_perf_oa_regs.h b/drivers/gpu/drm/i915/i915_perf_oa_regs.h
index ba103875e19f..e5ac7a8b5cb6 100644
--- a/drivers/gpu/drm/i915/i915_perf_oa_regs.h
+++ b/drivers/gpu/drm/i915/i915_perf_oa_regs.h
@@ -134,10 +134,6 @@
#define GDT_CHICKEN_BITS _MMIO(0x9840)
#define GT_NOA_ENABLE 0x00000080
-#define GEN12_SQCNT1 _MMIO(0x8718)
-#define GEN12_SQCNT1_PMON_ENABLE REG_BIT(30)
-#define GEN12_SQCNT1_OABPC REG_BIT(29)
-
/* Gen12 OAM unit */
#define GEN12_OAM_HEAD_POINTER_OFFSET (0x1a0)
#define GEN12_OAM_HEAD_POINTER_MASK 0xffffffc0
--
2.34.1
