[Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196

[Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196

[Tejas Upadhyay]

Wa_14016712196 implementation for mtl

Bspec: 72197

Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 38 ++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
index e1c76e5bfa82..2b9691ef1a4a 100644
--- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
@@ -177,14 +177,40 @@ u32 *gen12_emit_aux_table_inv(struct intel_gt *gt, u32 *cs, const i915_reg_t inv
 	return cs;
 }
 
+int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
+{
+	struct intel_engine_cs *engine = rq->engine;
+
+	if (IS_MTL_GRAPHICS_STEP(engine->i915, M, STEP_A0, STEP_B0) ||
+	    IS_MTL_GRAPHICS_STEP(engine->i915, P, STEP_A0, STEP_B0)) {
+		/* dummy PIPE_CONTROL + depth flush */
+		cs = intel_ring_begin(rq, 6);
+		if (IS_ERR(cs))
+			return PTR_ERR(cs);
+		cs = gen12_emit_pipe_control(cs,
+					     0,
+					     PIPE_CONTROL_DEPTH_CACHE_FLUSH,
+					     LRC_PPHWSP_SCRATCH_ADDR);
+		intel_ring_advance(rq, cs);
+	}
+
+	return 0;
+}
+
 int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
 {
 	struct intel_engine_cs *engine = rq->engine;
+	int err;
 
 	if (mode & EMIT_FLUSH) {
 		u32 flags = 0;
 		u32 *cs;
 
+		/* Wa_14016712196 */
+		err = mtl_dummy_pipe_control(rq, cs);
+		if (err)
+			return err;
+
 		flags |= PIPE_CONTROL_TILE_CACHE_FLUSH;
 		flags |= PIPE_CONTROL_FLUSH_L3;
 		flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
@@ -218,6 +244,11 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
 		u32 flags = 0;
 		u32 *cs, count;
 
+		/* Wa_14016712196 */
+		err = mtl_dummy_pipe_control(rq, cs);
+		if (err)
+			return err;
+
 		flags |= PIPE_CONTROL_COMMAND_CACHE_INVALIDATE;
 		flags |= PIPE_CONTROL_TLB_INVALIDATE;
 		flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
@@ -733,6 +764,13 @@ u32 *gen12_emit_fini_breadcrumb_rcs(struct i915_request *rq, u32 *cs)
 		     PIPE_CONTROL_DC_FLUSH_ENABLE |
 		     PIPE_CONTROL_FLUSH_ENABLE);
 
+	/* Wa_14016712196 */
+	if (IS_MTL_GRAPHICS_STEP(i915, M, STEP_A0, STEP_B0) ||
+	    IS_MTL_GRAPHICS_STEP(i915, P, STEP_A0, STEP_B0))
+		/* dummy PIPE_CONTROL + depth flush */
+		cs = gen12_emit_pipe_control(cs, 0,
+					     PIPE_CONTROL_DEPTH_CACHE_FLUSH, 0);
+
 	if (GRAPHICS_VER(i915) == 12 && GRAPHICS_VER_FULL(i915) < IP_VER(12, 50))
 		/* Wa_1409600907 */
 		flags |= PIPE_CONTROL_DEPTH_STALL;
-- 
2.25.1

[Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/gt: Add workaround 14016712196

[Patchwork]

== Series Details ==

Series: drm/i915/gt: Add workaround 14016712196
URL   : https://patchwork.freedesktop.org/series/117661/
State : failure

== Summary ==

Error: make failed
  CALL    scripts/checksyscalls.sh
  DESCEND objtool
  INSTALL libsubcmd_headers
  CC [M]  drivers/gpu/drm/i915/gt/gen8_engine_cs.o
drivers/gpu/drm/i915/gt/gen8_engine_cs.c:180:5: error: no previous prototype for ‘mtl_dummy_pipe_control’ [-Werror=missing-prototypes]
  180 | int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
      |     ^~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[5]: *** [scripts/Makefile.build:252: drivers/gpu/drm/i915/gt/gen8_engine_cs.o] Error 1
make[4]: *** [scripts/Makefile.build:494: drivers/gpu/drm/i915] Error 2
make[3]: *** [scripts/Makefile.build:494: drivers/gpu/drm] Error 2
make[2]: *** [scripts/Makefile.build:494: drivers/gpu] Error 2
make[1]: *** [scripts/Makefile.build:494: drivers] Error 2
make: *** [Makefile:2026: .] Error 2
Build failed, no error log produced

Re: [Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196

[kernel test robot]

Hi Tejas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-tip/drm-tip]

url:    https://github.com/intel-lab-lkp/linux/commits/Tejas-Upadhyay/drm-i915-gt-Add-workaround-14016712196/20230512-132314
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
patch link:    https://lore.kernel.org/r/20230512052744.778113-1-tejas.upadhyay%40intel.com
patch subject: [Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196
config: i386-randconfig-a004 (https://download.01.org/0day-ci/archive/20230512/202305121525.3EWdGoBY-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/429038a73fb0b1cbcfa5b41e17d70e48d835d347
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Tejas-Upadhyay/drm-i915-gt-Add-workaround-14016712196/20230512-132314
        git checkout 429038a73fb0b1cbcfa5b41e17d70e48d835d347
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/i915/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305121525.3EWdGoBY-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/gt/gen8_engine_cs.c:180:5: warning: no previous prototype for function 'mtl_dummy_pipe_control' [-Wmissing-prototypes]
   int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
       ^
   drivers/gpu/drm/i915/gt/gen8_engine_cs.c:180:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
   ^
   static 
>> drivers/gpu/drm/i915/gt/gen8_engine_cs.c:248:36: warning: variable 'cs' is uninitialized when used here [-Wuninitialized]
                   err = mtl_dummy_pipe_control(rq, cs);
                                                    ^~
   drivers/gpu/drm/i915/gt/gen8_engine_cs.c:245:10: note: initialize the variable 'cs' to silence this warning
                   u32 *cs, count;
                          ^
                           = NULL
   drivers/gpu/drm/i915/gt/gen8_engine_cs.c:210:36: warning: variable 'cs' is uninitialized when used here [-Wuninitialized]
                   err = mtl_dummy_pipe_control(rq, cs);
                                                    ^~
   drivers/gpu/drm/i915/gt/gen8_engine_cs.c:207:10: note: initialize the variable 'cs' to silence this warning
                   u32 *cs;
                          ^
                           = NULL
   3 warnings generated.


vim +/mtl_dummy_pipe_control +180 drivers/gpu/drm/i915/gt/gen8_engine_cs.c

   179	
 > 180	int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
   181	{
   182		struct intel_engine_cs *engine = rq->engine;
   183	
   184		if (IS_MTL_GRAPHICS_STEP(engine->i915, M, STEP_A0, STEP_B0) ||
   185		    IS_MTL_GRAPHICS_STEP(engine->i915, P, STEP_A0, STEP_B0)) {
   186			/* dummy PIPE_CONTROL + depth flush */
   187			cs = intel_ring_begin(rq, 6);
   188			if (IS_ERR(cs))
   189				return PTR_ERR(cs);
   190			cs = gen12_emit_pipe_control(cs,
   191						     0,
   192						     PIPE_CONTROL_DEPTH_CACHE_FLUSH,
   193						     LRC_PPHWSP_SCRATCH_ADDR);
   194			intel_ring_advance(rq, cs);
   195		}
   196	
   197		return 0;
   198	}
   199	
   200	int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
   201	{
   202		struct intel_engine_cs *engine = rq->engine;
   203		int err;
   204	
   205		if (mode & EMIT_FLUSH) {
   206			u32 flags = 0;
   207			u32 *cs;
   208	
   209			/* Wa_14016712196 */
   210			err = mtl_dummy_pipe_control(rq, cs);
   211			if (err)
   212				return err;
   213	
   214			flags |= PIPE_CONTROL_TILE_CACHE_FLUSH;
   215			flags |= PIPE_CONTROL_FLUSH_L3;
   216			flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
   217			flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
   218			/* Wa_1409600907:tgl,adl-p */
   219			flags |= PIPE_CONTROL_DEPTH_STALL;
   220			flags |= PIPE_CONTROL_DC_FLUSH_ENABLE;
   221			flags |= PIPE_CONTROL_FLUSH_ENABLE;
   222	
   223			flags |= PIPE_CONTROL_STORE_DATA_INDEX;
   224			flags |= PIPE_CONTROL_QW_WRITE;
   225	
   226			flags |= PIPE_CONTROL_CS_STALL;
   227	
   228			if (!HAS_3D_PIPELINE(engine->i915))
   229				flags &= ~PIPE_CONTROL_3D_ARCH_FLAGS;
   230			else if (engine->class == COMPUTE_CLASS)
   231				flags &= ~PIPE_CONTROL_3D_ENGINE_FLAGS;
   232	
   233			cs = intel_ring_begin(rq, 6);
   234			if (IS_ERR(cs))
   235				return PTR_ERR(cs);
   236	
   237			cs = gen12_emit_pipe_control(cs,
   238						     PIPE_CONTROL0_HDC_PIPELINE_FLUSH,
   239						     flags, LRC_PPHWSP_SCRATCH_ADDR);
   240			intel_ring_advance(rq, cs);
   241		}
   242	
   243		if (mode & EMIT_INVALIDATE) {
   244			u32 flags = 0;
   245			u32 *cs, count;
   246	
   247			/* Wa_14016712196 */
 > 248			err = mtl_dummy_pipe_control(rq, cs);
   249			if (err)
   250				return err;
   251	
   252			flags |= PIPE_CONTROL_COMMAND_CACHE_INVALIDATE;
   253			flags |= PIPE_CONTROL_TLB_INVALIDATE;
   254			flags |= PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE;
   255			flags |= PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE;
   256			flags |= PIPE_CONTROL_VF_CACHE_INVALIDATE;
   257			flags |= PIPE_CONTROL_CONST_CACHE_INVALIDATE;
   258			flags |= PIPE_CONTROL_STATE_CACHE_INVALIDATE;
   259	
   260			flags |= PIPE_CONTROL_STORE_DATA_INDEX;
   261			flags |= PIPE_CONTROL_QW_WRITE;
   262	
   263			flags |= PIPE_CONTROL_CS_STALL;
   264	
   265			if (!HAS_3D_PIPELINE(engine->i915))
   266				flags &= ~PIPE_CONTROL_3D_ARCH_FLAGS;
   267			else if (engine->class == COMPUTE_CLASS)
   268				flags &= ~PIPE_CONTROL_3D_ENGINE_FLAGS;
   269	
   270			if (!HAS_FLAT_CCS(rq->engine->i915))
   271				count = 8 + 4;
   272			else
   273				count = 8;
   274	
   275			cs = intel_ring_begin(rq, count);
   276			if (IS_ERR(cs))
   277				return PTR_ERR(cs);
   278	
   279			/*
   280			 * Prevent the pre-parser from skipping past the TLB
   281			 * invalidate and loading a stale page for the batch
   282			 * buffer / request payload.
   283			 */
   284			*cs++ = preparser_disable(true);
   285	
   286			cs = gen8_emit_pipe_control(cs, flags, LRC_PPHWSP_SCRATCH_ADDR);
   287	
   288			if (!HAS_FLAT_CCS(rq->engine->i915)) {
   289				/* hsdes: 1809175790 */
   290				cs = gen12_emit_aux_table_inv(rq->engine->gt,
   291							      cs, GEN12_GFX_CCS_AUX_NV);
   292			}
   293	
   294			*cs++ = preparser_disable(false);
   295			intel_ring_advance(rq, cs);
   296		}
   297	
   298		return 0;
   299	}
   300	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

Re: [Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196

[kernel test robot]

Hi Tejas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-tip/drm-tip]

url:    https://github.com/intel-lab-lkp/linux/commits/Tejas-Upadhyay/drm-i915-gt-Add-workaround-14016712196/20230512-132314
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
patch link:    https://lore.kernel.org/r/20230512052744.778113-1-tejas.upadhyay%40intel.com
patch subject: [Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196
config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20230512/202305121555.i5dslJkI-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/429038a73fb0b1cbcfa5b41e17d70e48d835d347
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Tejas-Upadhyay/drm-i915-gt-Add-workaround-14016712196/20230512-132314
        git checkout 429038a73fb0b1cbcfa5b41e17d70e48d835d347
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/i915/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305121555.i5dslJkI-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/gt/gen8_engine_cs.c:180:5: warning: no previous prototype for 'mtl_dummy_pipe_control' [-Wmissing-prototypes]
     180 | int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
         |     ^~~~~~~~~~~~~~~~~~~~~~


vim +/mtl_dummy_pipe_control +180 drivers/gpu/drm/i915/gt/gen8_engine_cs.c

   179	
 > 180	int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
   181	{
   182		struct intel_engine_cs *engine = rq->engine;
   183	
   184		if (IS_MTL_GRAPHICS_STEP(engine->i915, M, STEP_A0, STEP_B0) ||
   185		    IS_MTL_GRAPHICS_STEP(engine->i915, P, STEP_A0, STEP_B0)) {
   186			/* dummy PIPE_CONTROL + depth flush */
   187			cs = intel_ring_begin(rq, 6);
   188			if (IS_ERR(cs))
   189				return PTR_ERR(cs);
   190			cs = gen12_emit_pipe_control(cs,
   191						     0,
   192						     PIPE_CONTROL_DEPTH_CACHE_FLUSH,
   193						     LRC_PPHWSP_SCRATCH_ADDR);
   194			intel_ring_advance(rq, cs);
   195		}
   196	
   197		return 0;
   198	}
   199	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

Re: [Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196

[kernel test robot]

Hi Tejas,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-tip/drm-tip]

url:    https://github.com/intel-lab-lkp/linux/commits/Tejas-Upadhyay/drm-i915-gt-Add-workaround-14016712196/20230512-132314
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
patch link:    https://lore.kernel.org/r/20230512052744.778113-1-tejas.upadhyay%40intel.com
patch subject: [Intel-gfx] [PATCH] drm/i915/gt: Add workaround 14016712196
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20230512/202305121641.r0X84703-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/429038a73fb0b1cbcfa5b41e17d70e48d835d347
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Tejas-Upadhyay/drm-i915-gt-Add-workaround-14016712196/20230512-132314
        git checkout 429038a73fb0b1cbcfa5b41e17d70e48d835d347
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/i915/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305121641.r0X84703-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/i915/gt/gen8_engine_cs.c:180:5: error: no previous prototype for 'mtl_dummy_pipe_control' [-Werror=missing-prototypes]
     180 | int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
         |     ^~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/mtl_dummy_pipe_control +180 drivers/gpu/drm/i915/gt/gen8_engine_cs.c

   179	
 > 180	int mtl_dummy_pipe_control(struct i915_request *rq, u32 *cs)
   181	{
   182		struct intel_engine_cs *engine = rq->engine;
   183	
   184		if (IS_MTL_GRAPHICS_STEP(engine->i915, M, STEP_A0, STEP_B0) ||
   185		    IS_MTL_GRAPHICS_STEP(engine->i915, P, STEP_A0, STEP_B0)) {
   186			/* dummy PIPE_CONTROL + depth flush */
   187			cs = intel_ring_begin(rq, 6);
   188			if (IS_ERR(cs))
   189				return PTR_ERR(cs);
   190			cs = gen12_emit_pipe_control(cs,
   191						     0,
   192						     PIPE_CONTROL_DEPTH_CACHE_FLUSH,
   193						     LRC_PPHWSP_SCRATCH_ADDR);
   194			intel_ring_advance(rq, cs);
   195		}
   196	
   197		return 0;
   198	}
   199	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests