drm/xe/xe2: Add initial workarounds

Add the initial collection of gt/engine/lrc workarounds.
While at it, add some newlines around the platform/IP comments to make
them consistent across all workarounds.

v2:
  - FF_MODE is an MCR register (Matt Roper)
  - Group 18032247524 with other Xe2 workarounds (Matt Roper)
  - Move WA changing PSS_CHICKEN to lrc_was[] as for Xe2 that register
    is part of the render context image (Matt Roper)
  - Apply WA 16020518922 only on render engine (Matt Roper)
Signed-off-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane@intel.com>
Signed-off-by: Shekhar Chauhan <shekhar.chauhan@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20231024220739.224251-1-lucas.demarchi@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/regs/xe_gt_regs.h

@@ -94,7 +94,14 @@
 #define CHICKEN_RASTER_2			XE_REG_MCR(0x6208, XE_REG_OPTION_MASKED)
 #define   TBIMR_FAST_CLIP			REG_BIT(5)
 
+#define FF_MODE					XE_REG_MCR(0x6210)
+#define   DIS_TE_AUTOSTRIP			REG_BIT(31)
+#define   DIS_MESH_PARTIAL_AUTOSTRIP		REG_BIT(16)
+#define   DIS_MESH_AUTOSTRIP			REG_BIT(15)
+
 #define VFLSKPD					XE_REG_MCR(0x62a8, XE_REG_OPTION_MASKED)
+#define   DIS_PARTIAL_AUTOSTRIP			REG_BIT(9)
+#define   DIS_AUTOSTRIP				REG_BIT(6)
 #define   DIS_OVER_FETCH_CACHE			REG_BIT(1)
 #define   DIS_MULT_MISS_RD_SQUASH		REG_BIT(0)
 
@@ -111,6 +118,9 @@
 #define XEHP_PSS_MODE2				XE_REG_MCR(0x703c, XE_REG_OPTION_MASKED)
 #define   SCOREBOARD_STALL_FLUSH_CONTROL	REG_BIT(5)
 
+#define XEHP_PSS_CHICKEN			XE_REG_MCR(0x7044, XE_REG_OPTION_MASKED)
+#define   FD_END_COLLECT			REG_BIT(5)
+
 #define HIZ_CHICKEN					XE_REG(0x7018, XE_REG_OPTION_MASKED)
 #define   DG1_HZ_READ_SUPPRESSION_OPTIMIZATION_DISABLE	REG_BIT(14)
 #define   HZ_DEPTH_TEST_LE_GE_OPT_DISABLE		REG_BIT(13)
@@ -133,6 +143,9 @@
 #define VF_PREEMPTION				XE_REG(0x83a4, XE_REG_OPTION_MASKED)
 #define   PREEMPTION_VERTEX_COUNT		REG_GENMASK(15, 0)
 
+#define VF_SCRATCHPAD				XE_REG(0x83a8, XE_REG_OPTION_MASKED)
+#define   XE2_VFG_TED_CREDIT_INTERFACE_DISABLE	REG_BIT(13)
+
 #define VFG_PREEMPTION_CHICKEN			XE_REG(0x83b4, XE_REG_OPTION_MASKED)
 #define   POLYGON_TRIFAN_LINELOOP_DISABLE	REG_BIT(4)
 
@@ -225,6 +238,7 @@
 #define   MSCUNIT_CLKGATE_DIS			REG_BIT(10)
 #define   RCCUNIT_CLKGATE_DIS			REG_BIT(7)
 #define   SARBUNIT_CLKGATE_DIS			REG_BIT(5)
+#define   SBEUNIT_CLKGATE_DIS			REG_BIT(4)
 
 #define UNSLICE_UNIT_LEVEL_CLKGATE2		XE_REG(0x94e4)
 #define   VSUNIT_CLKGATE2_DIS			REG_BIT(19)
@@ -276,6 +290,8 @@
 #define XEHP_L3SCQREG7				XE_REG_MCR(0xb188)
 #define   BLEND_FILL_CACHING_OPT_DIS		REG_BIT(3)
 
+#define XEHPC_L3CLOS_MASK(i)			XE_REG_MCR(0xb194 + (i) * 8)
+
 #define XEHP_MERT_MOD_CTRL			XE_REG_MCR(0xcf28)
 #define RENDER_MOD_CTRL				XE_REG_MCR(0xcf2c)
 #define COMP_MOD_CTRL				XE_REG_MCR(0xcf30)
@@ -299,6 +315,9 @@
 #define XE_OAG_BLT_BUSY_FREE			XE_REG(0xdbbc)
 #define XE_OAG_RENDER_BUSY_FREE			XE_REG(0xdbdc)
 
+#define HALF_SLICE_CHICKEN5			XE_REG_MCR(0xe188, XE_REG_OPTION_MASKED)
+#define   DISABLE_SAMPLE_G_PERFORMANCE		REG_BIT(0)
+
 #define SAMPLER_MODE				XE_REG_MCR(0xe18c, XE_REG_OPTION_MASKED)
 #define   ENABLE_SMALLPL			REG_BIT(15)
 #define   SC_DISABLE_POWER_OPTIMIZATION_EBB	REG_BIT(9)
@@ -328,6 +347,7 @@
 #define ROW_CHICKEN				XE_REG_MCR(0xe4f0, XE_REG_OPTION_MASKED)
 #define   UGM_BACKUP_MODE			REG_BIT(13)
 #define   MDQ_ARBITRATION_MODE			REG_BIT(12)
+#define   EARLY_EOT_DIS				REG_BIT(1)
 
 #define ROW_CHICKEN2				XE_REG_MCR(0xe4f4, XE_REG_OPTION_MASKED)
 #define   DISABLE_READ_SUPPRESSION		REG_BIT(15)
@@ -345,11 +365,15 @@
 
 #define LSC_CHICKEN_BIT_0			XE_REG_MCR(0xe7c8)
 #define   DISABLE_D8_D16_COASLESCE		REG_BIT(30)
+#define   TGM_WRITE_EOM_FORCE			REG_BIT(17)
 #define   FORCE_1_SUB_MESSAGE_PER_FRAGMENT	REG_BIT(15)
+#define   SEQUENTIAL_ACCESS_UPGRADE_DISABLE	REG_BIT(13)
 
 #define LSC_CHICKEN_BIT_0_UDW			XE_REG_MCR(0xe7c8 + 4)
 #define   UGM_FRAGMENT_THRESHOLD_TO_3		REG_BIT(58 - 32)
 #define   DIS_CHAIN_2XSIMD8			REG_BIT(55 - 32)
+#define   XE2_ALLOC_DPA_STARVE_FIX_DIS		REG_BIT(47 - 32)
+#define   ENABLE_SMP_LD_RENDER_SURFACE_CONTROL	REG_BIT(44 - 32)
 #define   FORCE_SLM_FENCE_SCOPE_TO_TILE		REG_BIT(42 - 32)
 #define   FORCE_UGM_FENCE_SCOPE_TO_TILE		REG_BIT(41 - 32)
 #define   MAXREQS_PER_BANK			REG_GENMASK(39 - 32, 37 - 32)

drivers/gpu/drm/xe/xe_wa.c

@@ -232,6 +232,7 @@ static const struct xe_rtp_entry_sr gt_was[] = {
 	},
 
 	/* Xe_LPG */
+
 	{ XE_RTP_NAME("14015795083"),
 	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1270, 1271), GRAPHICS_STEP(A0, B0)),
 	  XE_RTP_ACTIONS(CLR(MISCCPCTL, DOP_CLOCK_GATE_RENDER_ENABLE))
@@ -245,6 +246,20 @@ static const struct xe_rtp_entry_sr gt_was[] = {
 	  XE_RTP_ACTIONS(SET(SQCNT1, ENFORCE_RAR))
 	},
 
+	/* Xe2_LPG */
+
+	{ XE_RTP_NAME("16020975621"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0)),
+	  XE_RTP_ACTIONS(SET(XEHP_SLICE_UNIT_LEVEL_CLKGATE, SBEUNIT_CLKGATE_DIS))
+	},
+	{ XE_RTP_NAME("14018157293"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0)),
+	  XE_RTP_ACTIONS(SET(XEHPC_L3CLOS_MASK(0), ~0),
+			 SET(XEHPC_L3CLOS_MASK(1), ~0),
+			 SET(XEHPC_L3CLOS_MASK(2), ~0),
+			 SET(XEHPC_L3CLOS_MASK(3), ~0))
+	},
+
 	{}
 };
 
@@ -527,6 +542,7 @@ static const struct xe_rtp_entry_sr engine_was[] = {
 	},
 
 	/* Xe_LPG */
+
 	{ XE_RTP_NAME("14017856879"),
 	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1270, 1271),
 		       FUNC(xe_rtp_match_first_render_or_compute)),
@@ -539,6 +555,41 @@ static const struct xe_rtp_entry_sr engine_was[] = {
 			     XE_RTP_NOCHECK))
 	},
 
+	/* Xe2_LPG */
+
+	{ XE_RTP_NAME("18032247524"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004),
+		       FUNC(xe_rtp_match_first_render_or_compute)),
+	  XE_RTP_ACTIONS(SET(LSC_CHICKEN_BIT_0, SEQUENTIAL_ACCESS_UPGRADE_DISABLE))
+	},
+	{ XE_RTP_NAME("16018712365"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), FUNC(xe_rtp_match_first_render_or_compute)),
+	  XE_RTP_ACTIONS(SET(LSC_CHICKEN_BIT_0_UDW, XE2_ALLOC_DPA_STARVE_FIX_DIS))
+	},
+	{ XE_RTP_NAME("14018957109"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0),
+		       FUNC(xe_rtp_match_first_render_or_compute)),
+	  XE_RTP_ACTIONS(SET(HALF_SLICE_CHICKEN5, DISABLE_SAMPLE_G_PERFORMANCE))
+	},
+	{ XE_RTP_NAME("16021540221"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0),
+		       FUNC(xe_rtp_match_first_render_or_compute)),
+	  XE_RTP_ACTIONS(SET(ROW_CHICKEN4, DISABLE_TDL_PUSH))
+	},
+	{ XE_RTP_NAME("14019322943"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0),
+		       FUNC(xe_rtp_match_first_render_or_compute)),
+	  XE_RTP_ACTIONS(SET(LSC_CHICKEN_BIT_0, TGM_WRITE_EOM_FORCE))
+	},
+	{ XE_RTP_NAME("14018471104"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), FUNC(xe_rtp_match_first_render_or_compute)),
+	  XE_RTP_ACTIONS(SET(LSC_CHICKEN_BIT_0_UDW, ENABLE_SMP_LD_RENDER_SURFACE_CONTROL))
+	},
+	{ XE_RTP_NAME("16018737384"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), FUNC(xe_rtp_match_first_render_or_compute)),
+	  XE_RTP_ACTIONS(SET(ROW_CHICKEN, EARLY_EOT_DIS))
+	},
+
 	{}
 };
 
@@ -625,11 +676,34 @@ static const struct xe_rtp_entry_sr lrc_was[] = {
 	},
 
 	/* Xe_LPG */
+
 	{ XE_RTP_NAME("18019271663"),
 	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1270, 1271)),
 	  XE_RTP_ACTIONS(SET(CACHE_MODE_1, MSAA_OPTIMIZATION_REDUC_DISABLE))
 	},
 
+	/* Xe2_LPG */
+
+	{ XE_RTP_NAME("16020518922"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0),
+		       ENGINE_CLASS(RENDER)),
+	  XE_RTP_ACTIONS(SET(FF_MODE,
+			     DIS_TE_AUTOSTRIP |
+			     DIS_MESH_PARTIAL_AUTOSTRIP |
+			     DIS_MESH_AUTOSTRIP),
+			 SET(VFLSKPD,
+			     DIS_PARTIAL_AUTOSTRIP |
+			     DIS_AUTOSTRIP))
+	},
+	{ XE_RTP_NAME("14019386621"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), ENGINE_CLASS(RENDER)),
+	  XE_RTP_ACTIONS(SET(VF_SCRATCHPAD, XE2_VFG_TED_CREDIT_INTERFACE_DISABLE))
+	},
+	{ XE_RTP_NAME("14019877138"),
+	  XE_RTP_RULES(GRAPHICS_VERSION(2004), ENGINE_CLASS(RENDER)),
+	  XE_RTP_ACTIONS(SET(XEHP_PSS_CHICKEN, FD_END_COLLECT))
+	},
+
 	{}
 };