[PATCH 1/8] drm/i915: implement WaDisableL3CacheAging on VLV

[PATCH 1/8] drm/i915: implement WaDisableL3CacheAging on VLV

[Jesse Barnes]

Needs to be set on every context restore as well, so set it as part of
the initial state so we can save/restore it.  Note this removes the IVB
workaround value from VLV and uses the default value, just adding in the
L3 cache aging disable bit, since the IVB value is wrong for VLV.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_reg.h |    1 +
 drivers/gpu/drm/i915/intel_pm.c |    2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index be22aeb..5da227b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3449,6 +3449,7 @@
 
 #define GEN7_L3CNTLREG1				0xB01C
 #define  GEN7_WA_FOR_GEN7_L3_CONTROL			0x3C4FFF8C
+#define  GEN7_L3AGDIS				(1<<19)
 
 #define GEN7_L3_CHICKEN_MODE_REGISTER		0xB030
 #define  GEN7_WA_L3_CHICKEN_MODE				0x20000000
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 59068be..d4ddcf2 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3635,7 +3635,7 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
 		   GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
 
 	/* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
-	I915_WRITE(GEN7_L3CNTLREG1, GEN7_WA_FOR_GEN7_L3_CONTROL);
+	I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS);
 	I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE);
 
 	/* WaForceL3Serialization */
-- 
1.7.9.5

[PATCH 2/8] drm/i915: implement WaDisableDopClockGatingisable on VLV and IVB

[Jesse Barnes]

v2: use correct register
v3: remove extra hunks, pull in register definitions & offset check directly
v4: add GT1 vs GT2 distinction for IVB portion (Ben)

References: https://bugs.freedesktop.org/show_bug.cgi?id=50233
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_drv.c |    7 +++++++
 drivers/gpu/drm/i915/i915_drv.h |    3 +++
 drivers/gpu/drm/i915/i915_reg.h |    4 ++++
 drivers/gpu/drm/i915/intel_pm.c |   13 ++++++++++++-
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 59dc481..8101cf6 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1128,6 +1128,13 @@ static bool IS_DISPLAYREG(u32 reg)
 	if (reg == GEN6_GDRST)
 		return false;
 
+	switch (reg) {
+	case GEN7_ROW_CHICKEN2:
+		return false;
+	default:
+		break;
+	}
+
 	return true;
 }
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2fcf284..1f55d9c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1124,6 +1124,9 @@ struct drm_i915_file_private {
 #define IS_IRONLAKE_D(dev)	((dev)->pci_device == 0x0042)
 #define IS_IRONLAKE_M(dev)	((dev)->pci_device == 0x0046)
 #define IS_IVYBRIDGE(dev)	(INTEL_INFO(dev)->is_ivybridge)
+#define IS_IVB_GT1(dev)		((dev)->pci_device == 0x0156 || \
+				 (dev)->pci_device == 0x0152 ||	\
+				 (dev)->pci_device == 0x015a)
 #define IS_VALLEYVIEW(dev)	(INTEL_INFO(dev)->is_valleyview)
 #define IS_HASWELL(dev)	(INTEL_INFO(dev)->is_haswell)
 #define IS_MOBILE(dev)		(INTEL_INFO(dev)->is_mobile)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5da227b..6464eaa 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4271,6 +4271,10 @@
 #define GEN7_L3LOG_BASE			0xB070
 #define GEN7_L3LOG_SIZE			0x80
 
+#define GEN7_ROW_CHICKEN2		0xe4f4
+#define GEN7_ROW_CHICKEN2_GT2		0xf4f4
+#define   DOP_CLOCK_GATING_DISABLE	(1<<0)
+
 #define G4X_AUD_VID_DID			0x62020
 #define INTEL_AUDIO_DEVCL		0x808629FB
 #define INTEL_AUDIO_DEVBLC		0x80862801
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d4ddcf2..a5ae0e7 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3560,7 +3560,14 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
 	I915_WRITE(GEN7_L3CNTLREG1,
 			GEN7_WA_FOR_GEN7_L3_CONTROL);
 	I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
-			GEN7_WA_L3_CHICKEN_MODE);
+		   GEN7_WA_L3_CHICKEN_MODE);
+	if (IS_IVB_GT1(dev))
+		I915_WRITE(GEN7_ROW_CHICKEN2,
+			   _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
+	else
+		I915_WRITE(GEN7_ROW_CHICKEN2_GT2,
+			   _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
+
 
 	/* WaForceL3Serialization */
 	I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
@@ -3642,6 +3649,10 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
 	I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
 		   ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
 
+	/* WaDisableDopClockGating */
+	I915_WRITE(GEN7_ROW_CHICKEN2,
+		   _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
+
 	/* This is required by WaCatErrorRejectionIssue */
 	I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
 		   I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
-- 
1.7.9.5

[PATCH 3/8] drm/i915: implement WaForceL3Serialization on VLV and IVB

[Jesse Barnes]

References: https://bugs.freedesktop.org/show_bug.cgi?id=50250
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/intel_pm.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a5ae0e7..d04e87f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3653,6 +3653,10 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
 	I915_WRITE(GEN7_ROW_CHICKEN2,
 		   _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
 
+	/* WaForceL3Serialization */
+	I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
+		   ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
+
 	/* This is required by WaCatErrorRejectionIssue */
 	I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
 		   I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
-- 
1.7.9.5

[PATCH 4/8] drm/i915: implement WaDisableVLVClockGating_VBIIssue on VLV

[Jesse Barnes]

This allows us to get the right vblank interrupt frequency.

v2: pull in register definition

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_reg.h |    2 ++
 drivers/gpu/drm/i915/intel_pm.c |    7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 6464eaa..4aec0a3 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -556,6 +556,8 @@
 #define IIR		0x020a4
 #define IMR		0x020a8
 #define ISR		0x020ac
+#define VLV_GUNIT_CLOCK_GATE	0x182060
+#define   GCFG_DIS		(1<<8)
 #define VLV_IIR_RW	0x182084
 #define VLV_IER		0x1820a0
 #define VLV_IIR		0x1820a4
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d04e87f..88c154c 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3713,6 +3713,13 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
 		   PIPEA_HLINE_INT_EN | PIPEA_VBLANK_INT_EN |
 		   SPRITEB_FLIPDONE_INT_EN | SPRITEA_FLIPDONE_INT_EN |
 		   PLANEA_FLIPDONE_INT_EN);
+
+	/*
+	 * WaDisableVLVClockGating_VBIIssue
+	 * Disable clock gating on th GCFG unit to prevent a delay
+	 * in the reporting of vblank events.
+	 */
+	I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS);
 }
 
 static void g4x_init_clock_gating(struct drm_device *dev)
-- 
1.7.9.5

[PATCH 5/8] drm/i915: implement WaDisablePSDDualDispatchEnable on IVB & VLV

[Jesse Barnes]

Workaround for dual port PS dispatch on GT1.

v2: pull in register definition & offset handling
v3: use IVB GT1 macro to get the right regs (Ben)
v4: add for VLV too (Ben)
v5: don't read the reg, it's masked so we'll only enable the one extra bit (Chris)
v6: use a _GT2 suffix for the second reg (Chris)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_drv.c |    1 +
 drivers/gpu/drm/i915/i915_reg.h |    5 +++++
 drivers/gpu/drm/i915/intel_pm.c |   11 +++++++++++
 3 files changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 8101cf6..d4b3507 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1130,6 +1130,7 @@ static bool IS_DISPLAYREG(u32 reg)
 
 	switch (reg) {
 	case GEN7_ROW_CHICKEN2:
+	case GEN7_HALF_SLICE_CHICKEN1:
 		return false;
 	default:
 		break;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4aec0a3..f29401b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4273,6 +4273,11 @@
 #define GEN7_L3LOG_BASE			0xB070
 #define GEN7_L3LOG_SIZE			0x80
 
+#define GEN7_HALF_SLICE_CHICKEN1	0xe100 /* IVB GT1 + VLV */
+#define GEN7_HALF_SLICE_CHICKEN1_GT2	0xf100
+#define   GEN7_MAX_PS_THREAD_DEP		(8<<12)
+#define   GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE	(1<<3)
+
 #define GEN7_ROW_CHICKEN2		0xe4f4
 #define GEN7_ROW_CHICKEN2_GT2		0xf4f4
 #define   DOP_CLOCK_GATING_DISABLE	(1<<0)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 88c154c..91709a3 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3552,6 +3552,14 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
 		   CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
 		   CHICKEN3_DGMG_DONE_FIX_DISABLE);
 
+	/* WaDisablePSDDualDispatchEnable */
+	if (IS_IVB_GT1(dev))
+		I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
+			   _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
+	else
+		I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2,
+			   _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
+
 	/* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
 	I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
 		   GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
@@ -3637,6 +3645,9 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
 		   CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
 		   CHICKEN3_DGMG_DONE_FIX_DISABLE);
 
+	I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
+		   _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
+
 	/* Apply the WaDisableRHWOOptimizationForRenderHang workaround. */
 	I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
 		   GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
-- 
1.7.9.5

[PATCH 6/8] drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op

[Jesse Barnes]

So store into the scratch space of the HWS to make sure the invalidate
occurs.

v2: use GTT address space for store, clean up #defines (Chris)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_reg.h         |    8 ++++++--
 drivers/gpu/drm/i915/intel_ringbuffer.c |   22 ++++++++++++++++++----
 drivers/gpu/drm/i915/intel_ringbuffer.h |    2 ++
 3 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f29401b..ea97430 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -242,8 +242,12 @@
  */
 #define MI_LOAD_REGISTER_IMM(x)	MI_INSTR(0x22, 2*x-1)
 #define MI_FLUSH_DW		MI_INSTR(0x26, 1) /* for GEN6 */
-#define   MI_INVALIDATE_TLB	(1<<18)
-#define   MI_INVALIDATE_BSD	(1<<7)
+#define   MI_FLUSH_DW_STORE_INDEX	(1<<21)
+#define   MI_INVALIDATE_TLB		(1<<18)
+#define   MI_FLUSH_DW_OP_STOREDW	(1<<14)
+#define   MI_INVALIDATE_BSD		(1<<7)
+#define   MI_FLUSH_DW_USE_GTT		(1<<2)
+#define   MI_FLUSH_DW_USE_PPGTT		(0<<2)
 #define MI_BATCH_BUFFER		MI_INSTR(0x30, 1)
 #define   MI_BATCH_NON_SECURE		(1)
 /* for snb/ivb/vlv this also means "batch in ppgtt" when ppgtt is enabled. */
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 785df4f..dc30d71 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1395,10 +1395,17 @@ static int gen6_ring_flush(struct intel_ring_buffer *ring,
 		return ret;
 
 	cmd = MI_FLUSH_DW;
+	/*
+	 * Bspec vol 1c.5 - video engine command streamer:
+	 * "If ENABLED, all TLBs will be invalidated once the flush
+	 * operation is complete. This bit is only valid when the
+	 * Post-Sync Operation field is a value of 1h or 3h."
+	 */
 	if (invalidate & I915_GEM_GPU_DOMAINS)
-		cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;
+		cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD |
+			MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
 	intel_ring_emit(ring, cmd);
-	intel_ring_emit(ring, 0);
+	intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
 	intel_ring_emit(ring, 0);
 	intel_ring_emit(ring, MI_NOOP);
 	intel_ring_advance(ring);
@@ -1460,10 +1467,17 @@ static int blt_ring_flush(struct intel_ring_buffer *ring,
 		return ret;
 
 	cmd = MI_FLUSH_DW;
+	/*
+	 * Bspec vol 1c.3 - blitter engine command streamer:
+	 * "If ENABLED, all TLBs will be invalidated once the flush
+	 * operation is complete. This bit is only valid when the
+	 * Post-Sync Operation field is a value of 1h or 3h."
+	 */
 	if (invalidate & I915_GEM_DOMAIN_RENDER)
-		cmd |= MI_INVALIDATE_TLB;
+		cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX |
+			MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_DW_OP_STOREDW;
 	intel_ring_emit(ring, cmd);
-	intel_ring_emit(ring, 0);
+	intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_INDEX | MI_FLUSH_DW_USE_GTT);
 	intel_ring_emit(ring, 0);
 	intel_ring_emit(ring, MI_NOOP);
 	intel_ring_advance(ring);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 3745d1d..5af65b8 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -183,6 +183,8 @@ intel_read_status_page(struct intel_ring_buffer *ring,
  * The area from dword 0x20 to 0x3ff is available for driver usage.
  */
 #define I915_GEM_HWS_INDEX		0x20
+#define I915_GEM_HWS_SCRATCH_INDEX	0x30
+#define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT)
 
 void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring);
 
-- 
1.7.9.5

[PATCH 7/8] drm/i915: PIPE_CONTROL TLB invalidate requires CS stall

[Jesse Barnes]

"If ENABLED, PIPE_CONTROL command will flush the in flight data  written
out by render engine to Global Observation point on flush done. Also
Requires stall bit ([20] of DW1) set."

So set the stall bit to ensure proper invalidation.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index dc30d71..82f8767 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -245,7 +245,7 @@ gen6_render_ring_flush(struct intel_ring_buffer *ring,
 		/*
 		 * TLB invalidate requires a post-sync write.
 		 */
-		flags |= PIPE_CONTROL_QW_WRITE;
+		flags |= PIPE_CONTROL_QW_WRITE | PIPE_CONTROL_CS_STALL;
 	}
 
 	ret = intel_ring_begin(ring, 4);
-- 
1.7.9.5

[PATCH 8/8] drm/i915: add clock gating regs to VLV offset check function

[Jesse Barnes]

So we can write them properly.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_drv.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index d4b3507..fb4b816 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1129,8 +1129,17 @@ static bool IS_DISPLAYREG(u32 reg)
 		return false;
 
 	switch (reg) {
+	case _3D_CHICKEN3:
+	case IVB_CHICKEN3:
+	case GEN7_COMMON_SLICE_CHICKEN1:
+	case GEN7_L3CNTLREG1:
+	case GEN7_L3_CHICKEN_MODE_REGISTER:
 	case GEN7_ROW_CHICKEN2:
+	case GEN7_L3SQCREG4:
+	case GEN7_SQ_CHICKEN_MBCUNIT_CONFIG:
 	case GEN7_HALF_SLICE_CHICKEN1:
+	case GEN6_MBCTL:
+	case GEN6_UCGCTL2:
 		return false;
 	default:
 		break;
-- 
1.7.9.5

Re: [PATCH 6/8] drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op

[Chris Wilson]

On Thu, 25 Oct 2012 12:15:46 -0700, Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
> So store into the scratch space of the HWS to make sure the invalidate
> occurs.
> 
> v2: use GTT address space for store, clean up #defines (Chris)
> 
> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
> ---
> @@ -1460,10 +1467,17 @@ static int blt_ring_flush(struct intel_ring_buffer *ring,
>  		return ret;
>  
>  	cmd = MI_FLUSH_DW;
> +	/*
> +	 * Bspec vol 1c.3 - blitter engine command streamer:
> +	 * "If ENABLED, all TLBs will be invalidated once the flush
> +	 * operation is complete. This bit is only valid when the
> +	 * Post-Sync Operation field is a value of 1h or 3h."
> +	 */
>  	if (invalidate & I915_GEM_DOMAIN_RENDER)
> -		cmd |= MI_INVALIDATE_TLB;
> +		cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX |
> +			MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_DW_OP_STOREDW;
>  	intel_ring_emit(ring, cmd);
> -	intel_ring_emit(ring, 0);
> +	intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_INDEX | MI_FLUSH_DW_USE_GTT);

s/SCRATCH_INDEX/SCRATCH_ADDR/
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

Re: [PATCH 6/8] drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op

[Jesse Barnes]

On Fri, 26 Oct 2012 12:13:39 +0100
Chris Wilson <chris@chris-wilson.co.uk> wrote:

> On Thu, 25 Oct 2012 12:15:46 -0700, Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
> > So store into the scratch space of the HWS to make sure the invalidate
> > occurs.
> > 
> > v2: use GTT address space for store, clean up #defines (Chris)
> > 
> > Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
> > ---
> > @@ -1460,10 +1467,17 @@ static int blt_ring_flush(struct intel_ring_buffer *ring,
> >  		return ret;
> >  
> >  	cmd = MI_FLUSH_DW;
> > +	/*
> > +	 * Bspec vol 1c.3 - blitter engine command streamer:
> > +	 * "If ENABLED, all TLBs will be invalidated once the flush
> > +	 * operation is complete. This bit is only valid when the
> > +	 * Post-Sync Operation field is a value of 1h or 3h."
> > +	 */
> >  	if (invalidate & I915_GEM_DOMAIN_RENDER)
> > -		cmd |= MI_INVALIDATE_TLB;
> > +		cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX |
> > +			MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_DW_OP_STOREDW;
> >  	intel_ring_emit(ring, cmd);
> > -	intel_ring_emit(ring, 0);
> > +	intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_INDEX | MI_FLUSH_DW_USE_GTT);
> 
> s/SCRATCH_INDEX/SCRATCH_ADDR/
> -Chris
> 


-- 
Jesse Barnes, Intel Open Source Technology Center


commit b99c792eddf804150b3341a85c256df50d7ab5c2
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Wed Sep 19 13:02:39 2012 -0700

    drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op v3
    
    So store into the scratch space of the HWS to make sure the invalidate
    occurs.
    
    v2: use GTT address space for store, clean up #defines (Chris)
    v3: use correct #define in blt ring flush (Chris)
    
    Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f29401b..ea97430 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -242,8 +242,12 @@
  */
 #define MI_LOAD_REGISTER_IMM(x)	MI_INSTR(0x22, 2*x-1)
 #define MI_FLUSH_DW		MI_INSTR(0x26, 1) /* for GEN6 */
-#define   MI_INVALIDATE_TLB	(1<<18)
-#define   MI_INVALIDATE_BSD	(1<<7)
+#define   MI_FLUSH_DW_STORE_INDEX	(1<<21)
+#define   MI_INVALIDATE_TLB		(1<<18)
+#define   MI_FLUSH_DW_OP_STOREDW	(1<<14)
+#define   MI_INVALIDATE_BSD		(1<<7)
+#define   MI_FLUSH_DW_USE_GTT		(1<<2)
+#define   MI_FLUSH_DW_USE_PPGTT		(0<<2)
 #define MI_BATCH_BUFFER		MI_INSTR(0x30, 1)
 #define   MI_BATCH_NON_SECURE		(1)
 /* for snb/ivb/vlv this also means "batch in ppgtt" when ppgtt is enabled. */
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 785df4f..55abda5 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1395,10 +1395,17 @@ static int gen6_ring_flush(struct intel_ring_buffer *ring,
 		return ret;
 
 	cmd = MI_FLUSH_DW;
+	/*
+	 * Bspec vol 1c.5 - video engine command streamer:
+	 * "If ENABLED, all TLBs will be invalidated once the flush
+	 * operation is complete. This bit is only valid when the
+	 * Post-Sync Operation field is a value of 1h or 3h."
+	 */
 	if (invalidate & I915_GEM_GPU_DOMAINS)
-		cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;
+		cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD |
+			MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
 	intel_ring_emit(ring, cmd);
-	intel_ring_emit(ring, 0);
+	intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
 	intel_ring_emit(ring, 0);
 	intel_ring_emit(ring, MI_NOOP);
 	intel_ring_advance(ring);
@@ -1460,10 +1467,17 @@ static int blt_ring_flush(struct intel_ring_buffer *ring,
 		return ret;
 
 	cmd = MI_FLUSH_DW;
+	/*
+	 * Bspec vol 1c.3 - blitter engine command streamer:
+	 * "If ENABLED, all TLBs will be invalidated once the flush
+	 * operation is complete. This bit is only valid when the
+	 * Post-Sync Operation field is a value of 1h or 3h."
+	 */
 	if (invalidate & I915_GEM_DOMAIN_RENDER)
-		cmd |= MI_INVALIDATE_TLB;
+		cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX |
+			MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_DW_OP_STOREDW;
 	intel_ring_emit(ring, cmd);
-	intel_ring_emit(ring, 0);
+	intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
 	intel_ring_emit(ring, 0);
 	intel_ring_emit(ring, MI_NOOP);
 	intel_ring_advance(ring);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 3745d1d..5af65b8 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -183,6 +183,8 @@ intel_read_status_page(struct intel_ring_buffer *ring,
  * The area from dword 0x20 to 0x3ff is available for driver usage.
  */
 #define I915_GEM_HWS_INDEX		0x20
+#define I915_GEM_HWS_SCRATCH_INDEX	0x30
+#define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT)
 
 void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring);

Re: [PATCH 4/8] drm/i915: implement WaDisableVLVClockGating_VBIIssue on VLV

[Antti Koskipää]

Hi,

On 10/25/12 22:15, Jesse Barnes wrote:
> This allows us to get the right vblank interrupt frequency.
> 
> v2: pull in register definition
> 
> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
> ---
>  drivers/gpu/drm/i915/i915_reg.h |    2 ++
>  drivers/gpu/drm/i915/intel_pm.c |    7 +++++++
>  2 files changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 6464eaa..4aec0a3 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -556,6 +556,8 @@
>  #define IIR		0x020a4
>  #define IMR		0x020a8
>  #define ISR		0x020ac
> +#define VLV_GUNIT_CLOCK_GATE	0x182060

Where did you pull this offset from? It's not in the Bspec.


> +#define   GCFG_DIS		(1<<8)
>  #define VLV_IIR_RW	0x182084
>  #define VLV_IER		0x1820a0
>  #define VLV_IIR		0x1820a4
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index d04e87f..88c154c 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3713,6 +3713,13 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
>  		   PIPEA_HLINE_INT_EN | PIPEA_VBLANK_INT_EN |
>  		   SPRITEB_FLIPDONE_INT_EN | SPRITEA_FLIPDONE_INT_EN |
>  		   PLANEA_FLIPDONE_INT_EN);
> +
> +	/*
> +	 * WaDisableVLVClockGating_VBIIssue
> +	 * Disable clock gating on th GCFG unit to prevent a delay
> +	 * in the reporting of vblank events.
> +	 */
> +	I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS);
>  }
>  
>  static void g4x_init_clock_gating(struct drm_device *dev)

-- 
- Antti

Re: [PATCH 4/8] drm/i915: implement WaDisableVLVClockGating_VBIIssue on VLV

[Jesse Barnes]

On Thu, 01 Nov 2012 16:48:17 +0200
Antti Koskipää <antti.koskipaa@linux.intel.com> wrote:

> Hi,
> 
> On 10/25/12 22:15, Jesse Barnes wrote:
> > This allows us to get the right vblank interrupt frequency.
> > 
> > v2: pull in register definition
> > 
> > Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
> > ---
> >  drivers/gpu/drm/i915/i915_reg.h |    2 ++
> >  drivers/gpu/drm/i915/intel_pm.c |    7 +++++++
> >  2 files changed, 9 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > index 6464eaa..4aec0a3 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -556,6 +556,8 @@
> >  #define IIR		0x020a4
> >  #define IMR		0x020a8
> >  #define ISR		0x020ac
> > +#define VLV_GUNIT_CLOCK_GATE	0x182060
> 
> Where did you pull this offset from? It's not in the Bspec.

No, it's in the gunit spec.  I'm still working on getting that one
opened up.

-- 
Jesse Barnes, Intel Open Source Technology Center
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http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 4/8] drm/i915: implement WaDisableVLVClockGating_VBIIssue on VLV

[Antti Koskipää]

On 11/01/12 16:50, Jesse Barnes wrote:
> No, it's in the gunit spec.  I'm still working on getting that one
> opened up.

In that case, for the whole lot:
Reviewed-by: Antti Koskipää <antti.koskipaa@intel.com>

-- 
- Antti




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Re: [PATCH 6/8] drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op

[Chris Wilson]

On Fri, 26 Oct 2012 09:42:42 -0700, Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
> commit b99c792eddf804150b3341a85c256df50d7ab5c2
> Author: Jesse Barnes <jbarnes@virtuousgeek.org>
> Date:   Wed Sep 19 13:02:39 2012 -0700
> 
>     drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op v3
>     
>     So store into the scratch space of the HWS to make sure the invalidate
>     occurs.
>     
>     v2: use GTT address space for store, clean up #defines (Chris)
>     v3: use correct #define in blt ring flush (Chris)
>     
>     Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

That looks to be the code I executed, but I can't confirm it fixes any
problems.

References: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1063252

which looks to be a likely victim of a missing TLB flush on the blitter
ring.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

Re: [PATCH 8/8] drm/i915: add clock gating regs to VLV offset check function

[Daniel Vetter]

On Thu, Oct 25, 2012 at 12:15:48PM -0700, Jesse Barnes wrote:
> So we can write them properly.
> 
> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

Slurped in the entire series, thanks for the patches.
-Daniel

> ---
>  drivers/gpu/drm/i915/i915_drv.c |    9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index d4b3507..fb4b816 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -1129,8 +1129,17 @@ static bool IS_DISPLAYREG(u32 reg)
>  		return false;
>  
>  	switch (reg) {
> +	case _3D_CHICKEN3:
> +	case IVB_CHICKEN3:
> +	case GEN7_COMMON_SLICE_CHICKEN1:
> +	case GEN7_L3CNTLREG1:
> +	case GEN7_L3_CHICKEN_MODE_REGISTER:
>  	case GEN7_ROW_CHICKEN2:
> +	case GEN7_L3SQCREG4:
> +	case GEN7_SQ_CHICKEN_MBCUNIT_CONFIG:
>  	case GEN7_HALF_SLICE_CHICKEN1:
> +	case GEN6_MBCTL:
> +	case GEN6_UCGCTL2:
>  		return false;

/me screams

>  	default:
>  		break;
> -- 
> 1.7.9.5
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch