drm/xe: Drop TLB invalidation from ring operations

Now that we issue TLB invalidations on unbinds and rebind from execs we
no longer need to issue TLB invalidations from the ring operations.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>

drivers/gpu/drm/xe/xe_ring_ops.c

@@ -83,31 +83,6 @@ static int emit_flush_invalidate(u32 flag, u32 *dw, int i)
 	return i;
 }
 
-static int emit_pipe_invalidate(u32 mask_flags, u32 *dw, int i)
-{
-	u32 flags = PIPE_CONTROL_CS_STALL |
-		PIPE_CONTROL_COMMAND_CACHE_INVALIDATE |
-		PIPE_CONTROL_TLB_INVALIDATE |
-		PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE |
-		PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE |
-		PIPE_CONTROL_VF_CACHE_INVALIDATE |
-		PIPE_CONTROL_CONST_CACHE_INVALIDATE |
-		PIPE_CONTROL_STATE_CACHE_INVALIDATE |
-		PIPE_CONTROL_QW_WRITE |
-		PIPE_CONTROL_STORE_DATA_INDEX;
-
-	flags &= ~mask_flags;
-
-	dw[i++] = GFX_OP_PIPE_CONTROL(6);
-	dw[i++] = flags;
-	dw[i++] = LRC_PPHWSP_SCRATCH_ADDR;
-	dw[i++] = 0;
-	dw[i++] = 0;
-	dw[i++] = 0;
-
-	return i;
-}
-
 #define MI_STORE_QWORD_IMM_GEN8_POSTED (MI_INSTR(0x20, 3) | (1 << 21))
 
 static int emit_store_imm_ppgtt_posted(u64 addr, u64 value,
@@ -148,11 +123,6 @@ static void __emit_job_gen12_copy(struct xe_sched_job *job, struct xe_lrc *lrc,
 	u32 dw[MAX_JOB_SIZE_DW], i = 0;
 	u32 ppgtt_flag = get_ppgtt_flag(job);
 
-	/* XXX: Conditional flushing possible */
-	dw[i++] = preparser_disable(true);
-	i = emit_flush_invalidate(0, dw, i);
-	dw[i++] = preparser_disable(false);
-
 	i = emit_store_imm_ggtt(xe_lrc_start_seqno_ggtt_addr(lrc),
 				seqno, dw, i);
 
@@ -181,9 +151,7 @@ static void __emit_job_gen12_video(struct xe_sched_job *job, struct xe_lrc *lrc,
 	struct xe_device *xe = gt_to_xe(gt);
 	bool decode = job->engine->class == XE_ENGINE_CLASS_VIDEO_DECODE;
 
-	/* XXX: Conditional flushing possible */
 	dw[i++] = preparser_disable(true);
-	i = emit_flush_invalidate(decode ? MI_INVALIDATE_BSD : 0, dw, i);
 	/* Wa_1809175790 */
 	if (!xe->info.has_flat_ccs) {
 		if (decode)
@@ -244,15 +212,8 @@ static void __emit_job_gen12_render_compute(struct xe_sched_job *job,
 	struct xe_gt *gt = job->engine->gt;
 	struct xe_device *xe = gt_to_xe(gt);
 	bool pvc = xe->info.platform == XE_PVC;
-	u32 mask_flags = 0;
 
-	/* XXX: Conditional flushing possible */
 	dw[i++] = preparser_disable(true);
-	if (pvc)
-		mask_flags = PIPE_CONTROL_3D_ARCH_FLAGS;
-	else if (job->engine->class == XE_ENGINE_CLASS_COMPUTE)
-		mask_flags = PIPE_CONTROL_3D_ENGINE_FLAGS;
-	i = emit_pipe_invalidate(mask_flags, dw, i);
 	/* Wa_1809175790 */
 	if (!xe->info.has_flat_ccs)
 		i = emit_aux_table_inv(gt, GEN12_CCS_AUX_INV.reg, dw, i);
@@ -287,6 +248,7 @@ static void emit_migration_job_gen12(struct xe_sched_job *job,
 
 	i = emit_bb_start(job->batch_addr[0], BIT(8), dw, i);
 
+	/* XXX: Do we need this? Leaving for now. */
 	dw[i++] = preparser_disable(true);
 	i = emit_flush_invalidate(0, dw, i);
 	dw[i++] = preparser_disable(false);