1 files changed, 479 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_ring_ops.c b/drivers/gpu/drm/xe/xe_ring_ops.c
new file mode 100644
index 0000000000..68495f8858
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_ring_ops.c
@@ -0,0 +1,479 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include "xe_ring_ops.h"
+
+#include "generated/xe_wa_oob.h"
+#include "instructions/xe_mi_commands.h"
+#include "regs/xe_engine_regs.h"
+#include "regs/xe_gpu_commands.h"
+#include "regs/xe_gt_regs.h"
+#include "regs/xe_lrc_layout.h"
+#include "xe_exec_queue_types.h"
+#include "xe_gt.h"
+#include "xe_lrc.h"
+#include "xe_macros.h"
+#include "xe_sched_job.h"
+#include "xe_vm_types.h"
+#include "xe_vm.h"
+#include "xe_wa.h"
+
+/*
+ * 3D-related flags that can't be set on _engines_ that lack access to the 3D
+ * pipeline (i.e., CCS engines).
+ */
+#define PIPE_CONTROL_3D_ENGINE_FLAGS (\
+		PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH | \
+		PIPE_CONTROL_DEPTH_CACHE_FLUSH | \
+		PIPE_CONTROL_TILE_CACHE_FLUSH | \
+		PIPE_CONTROL_DEPTH_STALL | \
+		PIPE_CONTROL_STALL_AT_SCOREBOARD | \
+		PIPE_CONTROL_PSD_SYNC | \
+		PIPE_CONTROL_AMFS_FLUSH | \
+		PIPE_CONTROL_VF_CACHE_INVALIDATE | \
+		PIPE_CONTROL_GLOBAL_SNAPSHOT_RESET)
+
+/* 3D-related flags that can't be set on _platforms_ that lack a 3D pipeline */
+#define PIPE_CONTROL_3D_ARCH_FLAGS ( \
+		PIPE_CONTROL_3D_ENGINE_FLAGS | \
+		PIPE_CONTROL_INDIRECT_STATE_DISABLE | \
+		PIPE_CONTROL_FLUSH_ENABLE | \
+		PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE | \
+		PIPE_CONTROL_DC_FLUSH_ENABLE)
+
+static u32 preparser_disable(bool state)
+{
+	return MI_ARB_CHECK | BIT(8) | state;
+}
+
+static int emit_aux_table_inv(struct xe_gt *gt, struct xe_reg reg,
+			      u32 *dw, int i)
+{
+	dw[i++] = MI_LOAD_REGISTER_IMM | MI_LRI_NUM_REGS(1) | MI_LRI_MMIO_REMAP_EN;
+	dw[i++] = reg.addr + gt->mmio.adj_offset;
+	dw[i++] = AUX_INV;
+	dw[i++] = MI_NOOP;
+
+	return i;
+}
+
+static int emit_user_interrupt(u32 *dw, int i)
+{
+	dw[i++] = MI_USER_INTERRUPT;
+	dw[i++] = MI_ARB_ON_OFF | MI_ARB_ENABLE;
+	dw[i++] = MI_ARB_CHECK;
+
+	return i;
+}
+
+static int emit_store_imm_ggtt(u32 addr, u32 value, u32 *dw, int i)
+{
+	dw[i++] = MI_STORE_DATA_IMM | MI_SDI_GGTT | MI_SDI_NUM_DW(1);
+	dw[i++] = addr;
+	dw[i++] = 0;
+	dw[i++] = value;
+
+	return i;
+}
+
+static int emit_flush_imm_ggtt(u32 addr, u32 value, bool invalidate_tlb,
+			       u32 *dw, int i)
+{
+	dw[i++] = MI_FLUSH_DW | MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_IMM_DW |
+		(invalidate_tlb ? MI_INVALIDATE_TLB : 0);
+	dw[i++] = addr | MI_FLUSH_DW_USE_GTT;
+	dw[i++] = 0;
+	dw[i++] = value;
+
+	return i;
+}
+
+static int emit_bb_start(u64 batch_addr, u32 ppgtt_flag, u32 *dw, int i)
+{
+	dw[i++] = MI_BATCH_BUFFER_START | ppgtt_flag | XE_INSTR_NUM_DW(3);
+	dw[i++] = lower_32_bits(batch_addr);
+	dw[i++] = upper_32_bits(batch_addr);
+
+	return i;
+}
+
+static int emit_flush_invalidate(u32 flag, u32 *dw, int i)
+{
+	dw[i] = MI_FLUSH_DW;
+	dw[i] |= flag;
+	dw[i++] |= MI_INVALIDATE_TLB | MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_IMM_DW |
+		MI_FLUSH_DW_STORE_INDEX;
+
+	dw[i++] = LRC_PPHWSP_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT;
+	dw[i++] = 0;
+	dw[i++] = ~0U;
+
+	return i;
+}
+
+static int emit_pipe_invalidate(u32 mask_flags, bool invalidate_tlb, u32 *dw,
+				int i)
+{
+	u32 flags = PIPE_CONTROL_CS_STALL |
+		PIPE_CONTROL_COMMAND_CACHE_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;
+
+	if (invalidate_tlb)
+		flags |= PIPE_CONTROL_TLB_INVALIDATE;
+
+	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;
+}
+
+static int emit_store_imm_ppgtt_posted(u64 addr, u64 value,
+				       u32 *dw, int i)
+{
+	dw[i++] = MI_STORE_DATA_IMM | MI_SDI_NUM_QW(1);
+	dw[i++] = lower_32_bits(addr);
+	dw[i++] = upper_32_bits(addr);
+	dw[i++] = lower_32_bits(value);
+	dw[i++] = upper_32_bits(value);
+
+	return i;
+}
+
+static int emit_render_cache_flush(struct xe_sched_job *job, u32 *dw, int i)
+{
+	struct xe_gt *gt = job->q->gt;
+	bool lacks_render = !(gt->info.engine_mask & XE_HW_ENGINE_RCS_MASK);
+	u32 flags;
+
+	flags = (PIPE_CONTROL_CS_STALL |
+		 PIPE_CONTROL_TILE_CACHE_FLUSH |
+		 PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH |
+		 PIPE_CONTROL_DEPTH_CACHE_FLUSH |
+		 PIPE_CONTROL_DC_FLUSH_ENABLE |
+		 PIPE_CONTROL_FLUSH_ENABLE);
+
+	if (XE_WA(gt, 1409600907))
+		flags |= PIPE_CONTROL_DEPTH_STALL;
+
+	if (lacks_render)
+		flags &= ~PIPE_CONTROL_3D_ARCH_FLAGS;
+	else if (job->q->class == XE_ENGINE_CLASS_COMPUTE)
+		flags &= ~PIPE_CONTROL_3D_ENGINE_FLAGS;
+
+	dw[i++] = GFX_OP_PIPE_CONTROL(6) | PIPE_CONTROL0_HDC_PIPELINE_FLUSH;
+	dw[i++] = flags;
+	dw[i++] = 0;
+	dw[i++] = 0;
+	dw[i++] = 0;
+	dw[i++] = 0;
+
+	return i;
+}
+
+static int emit_pipe_control_to_ring_end(struct xe_hw_engine *hwe, u32 *dw, int i)
+{
+	if (hwe->class != XE_ENGINE_CLASS_RENDER)
+		return i;
+
+	if (XE_WA(hwe->gt, 16020292621)) {
+		dw[i++] = GFX_OP_PIPE_CONTROL(6);
+		dw[i++] = PIPE_CONTROL_LRI_POST_SYNC;
+		dw[i++] = RING_NOPID(hwe->mmio_base).addr;
+		dw[i++] = 0;
+		dw[i++] = 0;
+		dw[i++] = 0;
+	}
+
+	return i;
+}
+
+static int emit_pipe_imm_ggtt(u32 addr, u32 value, bool stall_only, u32 *dw,
+			      int i)
+{
+	dw[i++] = GFX_OP_PIPE_CONTROL(6);
+	dw[i++] = (stall_only ? PIPE_CONTROL_CS_STALL :
+		   PIPE_CONTROL_FLUSH_ENABLE | PIPE_CONTROL_CS_STALL) |
+		PIPE_CONTROL_GLOBAL_GTT_IVB | PIPE_CONTROL_QW_WRITE;
+	dw[i++] = addr;
+	dw[i++] = 0;
+	dw[i++] = value;
+	dw[i++] = 0; /* We're thrashing one extra dword. */
+
+	return i;
+}
+
+static u32 get_ppgtt_flag(struct xe_sched_job *job)
+{
+	return job->q->vm ? BIT(8) : 0;
+}
+
+/* for engines that don't require any special HW handling (no EUs, no aux inval, etc) */
+static void __emit_job_gen12_simple(struct xe_sched_job *job, struct xe_lrc *lrc,
+				    u64 batch_addr, u32 seqno)
+{
+	u32 dw[MAX_JOB_SIZE_DW], i = 0;
+	u32 ppgtt_flag = get_ppgtt_flag(job);
+	struct xe_gt *gt = job->q->gt;
+
+	if (job->ring_ops_flush_tlb) {
+		dw[i++] = preparser_disable(true);
+		i = emit_flush_imm_ggtt(xe_lrc_start_seqno_ggtt_addr(lrc),
+					seqno, true, dw, i);
+		dw[i++] = preparser_disable(false);
+	} else {
+		i = emit_store_imm_ggtt(xe_lrc_start_seqno_ggtt_addr(lrc),
+					seqno, dw, i);
+	}
+
+	i = emit_bb_start(batch_addr, ppgtt_flag, dw, i);
+
+	if (job->user_fence.used)
+		i = emit_store_imm_ppgtt_posted(job->user_fence.addr,
+						job->user_fence.value,
+						dw, i);
+
+	i = emit_flush_imm_ggtt(xe_lrc_seqno_ggtt_addr(lrc), seqno, false, dw, i);
+
+	i = emit_user_interrupt(dw, i);
+
+	xe_gt_assert(gt, i <= MAX_JOB_SIZE_DW);
+
+	xe_lrc_write_ring(lrc, dw, i * sizeof(*dw));
+}
+
+static bool has_aux_ccs(struct xe_device *xe)
+{
+	/*
+	 * PVC is a special case that has no compression of either type
+	 * (FlatCCS or AuxCCS).  Also, AuxCCS is no longer used from Xe2
+	 * onward, so any future platforms with no FlatCCS will not have
+	 * AuxCCS either.
+	 */
+	if (GRAPHICS_VER(xe) >= 20 || xe->info.platform == XE_PVC)
+		return false;
+
+	return !xe->info.has_flat_ccs;
+}
+
+static void __emit_job_gen12_video(struct xe_sched_job *job, struct xe_lrc *lrc,
+				   u64 batch_addr, u32 seqno)
+{
+	u32 dw[MAX_JOB_SIZE_DW], i = 0;
+	u32 ppgtt_flag = get_ppgtt_flag(job);
+	struct xe_gt *gt = job->q->gt;
+	struct xe_device *xe = gt_to_xe(gt);
+	bool decode = job->q->class == XE_ENGINE_CLASS_VIDEO_DECODE;
+
+	dw[i++] = preparser_disable(true);
+
+	/* hsdes: 1809175790 */
+	if (has_aux_ccs(xe)) {
+		if (decode)
+			i = emit_aux_table_inv(gt, VD0_AUX_INV, dw, i);
+		else
+			i = emit_aux_table_inv(gt, VE0_AUX_INV, dw, i);
+	}
+
+	if (job->ring_ops_flush_tlb)
+		i = emit_flush_imm_ggtt(xe_lrc_start_seqno_ggtt_addr(lrc),
+					seqno, true, dw, i);
+
+	dw[i++] = preparser_disable(false);
+
+	if (!job->ring_ops_flush_tlb)
+		i = emit_store_imm_ggtt(xe_lrc_start_seqno_ggtt_addr(lrc),
+					seqno, dw, i);
+
+	i = emit_bb_start(batch_addr, ppgtt_flag, dw, i);
+
+	if (job->user_fence.used)
+		i = emit_store_imm_ppgtt_posted(job->user_fence.addr,
+						job->user_fence.value,
+						dw, i);
+
+	i = emit_flush_imm_ggtt(xe_lrc_seqno_ggtt_addr(lrc), seqno, false, dw, i);
+
+	i = emit_user_interrupt(dw, i);
+
+	xe_gt_assert(gt, i <= MAX_JOB_SIZE_DW);
+
+	xe_lrc_write_ring(lrc, dw, i * sizeof(*dw));
+}
+
+static void __emit_job_gen12_render_compute(struct xe_sched_job *job,
+					    struct xe_lrc *lrc,
+					    u64 batch_addr, u32 seqno)
+{
+	u32 dw[MAX_JOB_SIZE_DW], i = 0;
+	u32 ppgtt_flag = get_ppgtt_flag(job);
+	struct xe_gt *gt = job->q->gt;
+	struct xe_device *xe = gt_to_xe(gt);
+	bool lacks_render = !(gt->info.engine_mask & XE_HW_ENGINE_RCS_MASK);
+	u32 mask_flags = 0;
+
+	dw[i++] = preparser_disable(true);
+	if (lacks_render)
+		mask_flags = PIPE_CONTROL_3D_ARCH_FLAGS;
+	else if (job->q->class == XE_ENGINE_CLASS_COMPUTE)
+		mask_flags = PIPE_CONTROL_3D_ENGINE_FLAGS;
+
+	/* See __xe_pt_bind_vma() for a discussion on TLB invalidations. */
+	i = emit_pipe_invalidate(mask_flags, job->ring_ops_flush_tlb, dw, i);
+
+	/* hsdes: 1809175790 */
+	if (has_aux_ccs(xe))
+		i = emit_aux_table_inv(gt, CCS_AUX_INV, dw, i);
+
+	dw[i++] = preparser_disable(false);
+
+	i = emit_store_imm_ggtt(xe_lrc_start_seqno_ggtt_addr(lrc),
+				seqno, dw, i);
+
+	i = emit_bb_start(batch_addr, ppgtt_flag, dw, i);
+
+	i = emit_render_cache_flush(job, dw, i);
+
+	if (job->user_fence.used)
+		i = emit_store_imm_ppgtt_posted(job->user_fence.addr,
+						job->user_fence.value,
+						dw, i);
+
+	i = emit_pipe_imm_ggtt(xe_lrc_seqno_ggtt_addr(lrc), seqno, lacks_render, dw, i);
+
+	i = emit_user_interrupt(dw, i);
+
+	i = emit_pipe_control_to_ring_end(job->q->hwe, dw, i);
+
+	xe_gt_assert(gt, i <= MAX_JOB_SIZE_DW);
+
+	xe_lrc_write_ring(lrc, dw, i * sizeof(*dw));
+}
+
+static void emit_migration_job_gen12(struct xe_sched_job *job,
+				     struct xe_lrc *lrc, u32 seqno)
+{
+	u32 dw[MAX_JOB_SIZE_DW], i = 0;
+
+	i = emit_store_imm_ggtt(xe_lrc_start_seqno_ggtt_addr(lrc),
+				seqno, dw, i);
+
+	dw[i++] = MI_ARB_ON_OFF | MI_ARB_DISABLE; /* Enabled again below */
+
+	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);
+
+	i = emit_bb_start(job->batch_addr[1], BIT(8), dw, i);
+
+	dw[i++] = MI_FLUSH_DW | MI_INVALIDATE_TLB | job->migrate_flush_flags |
+		MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_IMM_DW;
+	dw[i++] = xe_lrc_seqno_ggtt_addr(lrc) | MI_FLUSH_DW_USE_GTT;
+	dw[i++] = 0;
+	dw[i++] = seqno; /* value */
+
+	i = emit_user_interrupt(dw, i);
+
+	xe_gt_assert(job->q->gt, i <= MAX_JOB_SIZE_DW);
+
+	xe_lrc_write_ring(lrc, dw, i * sizeof(*dw));
+}
+
+static void emit_job_gen12_gsc(struct xe_sched_job *job)
+{
+	struct xe_gt *gt = job->q->gt;
+
+	xe_gt_assert(gt, job->q->width <= 1); /* no parallel submission for GSCCS */
+
+	__emit_job_gen12_simple(job, job->q->lrc,
+				job->batch_addr[0],
+				xe_sched_job_seqno(job));
+}
+
+static void emit_job_gen12_copy(struct xe_sched_job *job)
+{
+	int i;
+
+	if (xe_sched_job_is_migration(job->q)) {
+		emit_migration_job_gen12(job, job->q->lrc,
+					 xe_sched_job_seqno(job));
+		return;
+	}
+
+	for (i = 0; i < job->q->width; ++i)
+		__emit_job_gen12_simple(job, job->q->lrc + i,
+				        job->batch_addr[i],
+				        xe_sched_job_seqno(job));
+}
+
+static void emit_job_gen12_video(struct xe_sched_job *job)
+{
+	int i;
+
+	/* FIXME: Not doing parallel handshake for now */
+	for (i = 0; i < job->q->width; ++i)
+		__emit_job_gen12_video(job, job->q->lrc + i,
+				       job->batch_addr[i],
+				       xe_sched_job_seqno(job));
+}
+
+static void emit_job_gen12_render_compute(struct xe_sched_job *job)
+{
+	int i;
+
+	for (i = 0; i < job->q->width; ++i)
+		__emit_job_gen12_render_compute(job, job->q->lrc + i,
+						job->batch_addr[i],
+						xe_sched_job_seqno(job));
+}
+
+static const struct xe_ring_ops ring_ops_gen12_gsc = {
+	.emit_job = emit_job_gen12_gsc,
+};
+
+static const struct xe_ring_ops ring_ops_gen12_copy = {
+	.emit_job = emit_job_gen12_copy,
+};
+
+static const struct xe_ring_ops ring_ops_gen12_video = {
+	.emit_job = emit_job_gen12_video,
+};
+
+static const struct xe_ring_ops ring_ops_gen12_render_compute = {
+	.emit_job = emit_job_gen12_render_compute,
+};
+
+const struct xe_ring_ops *
+xe_ring_ops_get(struct xe_gt *gt, enum xe_engine_class class)
+{
+	switch (class) {
+	case XE_ENGINE_CLASS_OTHER:
+		return &ring_ops_gen12_gsc;
+	case XE_ENGINE_CLASS_COPY:
+		return &ring_ops_gen12_copy;
+	case XE_ENGINE_CLASS_VIDEO_DECODE:
+	case XE_ENGINE_CLASS_VIDEO_ENHANCE:
+		return &ring_ops_gen12_video;
+	case XE_ENGINE_CLASS_RENDER:
+	case XE_ENGINE_CLASS_COMPUTE:
+		return &ring_ops_gen12_render_compute;
+	default:
+		return NULL;
+	}
+}