Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2392 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
new file mode 100644
index 000000000..07967adce
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -0,0 +1,2392 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2016 Intel Corporation
+ */
+
+#include <linux/string_helpers.h>
+
+#include <drm/drm_print.h>
+
+#include "gem/i915_gem_context.h"
+#include "gem/i915_gem_internal.h"
+#include "gt/intel_gt_regs.h"
+
+#include "i915_cmd_parser.h"
+#include "i915_drv.h"
+#include "intel_breadcrumbs.h"
+#include "intel_context.h"
+#include "intel_engine.h"
+#include "intel_engine_pm.h"
+#include "intel_engine_regs.h"
+#include "intel_engine_user.h"
+#include "intel_execlists_submission.h"
+#include "intel_gt.h"
+#include "intel_gt_mcr.h"
+#include "intel_gt_pm.h"
+#include "intel_gt_requests.h"
+#include "intel_lrc.h"
+#include "intel_lrc_reg.h"
+#include "intel_reset.h"
+#include "intel_ring.h"
+#include "uc/intel_guc_submission.h"
+
+/* Haswell does have the CXT_SIZE register however it does not appear to be
+ * valid. Now, docs explain in dwords what is in the context object. The full
+ * size is 70720 bytes, however, the power context and execlist context will
+ * never be saved (power context is stored elsewhere, and execlists don't work
+ * on HSW) - so the final size, including the extra state required for the
+ * Resource Streamer, is 66944 bytes, which rounds to 17 pages.
+ */
+#define HSW_CXT_TOTAL_SIZE		(17 * PAGE_SIZE)
+
+#define DEFAULT_LR_CONTEXT_RENDER_SIZE	(22 * PAGE_SIZE)
+#define GEN8_LR_CONTEXT_RENDER_SIZE	(20 * PAGE_SIZE)
+#define GEN9_LR_CONTEXT_RENDER_SIZE	(22 * PAGE_SIZE)
+#define GEN11_LR_CONTEXT_RENDER_SIZE	(14 * PAGE_SIZE)
+
+#define GEN8_LR_CONTEXT_OTHER_SIZE	( 2 * PAGE_SIZE)
+
+#define MAX_MMIO_BASES 3
+struct engine_info {
+	u8 class;
+	u8 instance;
+	/* mmio bases table *must* be sorted in reverse graphics_ver order */
+	struct engine_mmio_base {
+		u32 graphics_ver : 8;
+		u32 base : 24;
+	} mmio_bases[MAX_MMIO_BASES];
+};
+
+static const struct engine_info intel_engines[] = {
+	[RCS0] = {
+		.class = RENDER_CLASS,
+		.instance = 0,
+		.mmio_bases = {
+			{ .graphics_ver = 1, .base = RENDER_RING_BASE }
+		},
+	},
+	[BCS0] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 0,
+		.mmio_bases = {
+			{ .graphics_ver = 6, .base = BLT_RING_BASE }
+		},
+	},
+	[BCS1] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 1,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS1_RING_BASE }
+		},
+	},
+	[BCS2] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 2,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS2_RING_BASE }
+		},
+	},
+	[BCS3] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 3,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS3_RING_BASE }
+		},
+	},
+	[BCS4] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 4,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS4_RING_BASE }
+		},
+	},
+	[BCS5] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 5,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS5_RING_BASE }
+		},
+	},
+	[BCS6] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 6,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS6_RING_BASE }
+		},
+	},
+	[BCS7] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 7,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS7_RING_BASE }
+		},
+	},
+	[BCS8] = {
+		.class = COPY_ENGINE_CLASS,
+		.instance = 8,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHPC_BCS8_RING_BASE }
+		},
+	},
+	[VCS0] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 0,
+		.mmio_bases = {
+			{ .graphics_ver = 11, .base = GEN11_BSD_RING_BASE },
+			{ .graphics_ver = 6, .base = GEN6_BSD_RING_BASE },
+			{ .graphics_ver = 4, .base = BSD_RING_BASE }
+		},
+	},
+	[VCS1] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 1,
+		.mmio_bases = {
+			{ .graphics_ver = 11, .base = GEN11_BSD2_RING_BASE },
+			{ .graphics_ver = 8, .base = GEN8_BSD2_RING_BASE }
+		},
+	},
+	[VCS2] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 2,
+		.mmio_bases = {
+			{ .graphics_ver = 11, .base = GEN11_BSD3_RING_BASE }
+		},
+	},
+	[VCS3] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 3,
+		.mmio_bases = {
+			{ .graphics_ver = 11, .base = GEN11_BSD4_RING_BASE }
+		},
+	},
+	[VCS4] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 4,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHP_BSD5_RING_BASE }
+		},
+	},
+	[VCS5] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 5,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHP_BSD6_RING_BASE }
+		},
+	},
+	[VCS6] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 6,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHP_BSD7_RING_BASE }
+		},
+	},
+	[VCS7] = {
+		.class = VIDEO_DECODE_CLASS,
+		.instance = 7,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHP_BSD8_RING_BASE }
+		},
+	},
+	[VECS0] = {
+		.class = VIDEO_ENHANCEMENT_CLASS,
+		.instance = 0,
+		.mmio_bases = {
+			{ .graphics_ver = 11, .base = GEN11_VEBOX_RING_BASE },
+			{ .graphics_ver = 7, .base = VEBOX_RING_BASE }
+		},
+	},
+	[VECS1] = {
+		.class = VIDEO_ENHANCEMENT_CLASS,
+		.instance = 1,
+		.mmio_bases = {
+			{ .graphics_ver = 11, .base = GEN11_VEBOX2_RING_BASE }
+		},
+	},
+	[VECS2] = {
+		.class = VIDEO_ENHANCEMENT_CLASS,
+		.instance = 2,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHP_VEBOX3_RING_BASE }
+		},
+	},
+	[VECS3] = {
+		.class = VIDEO_ENHANCEMENT_CLASS,
+		.instance = 3,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = XEHP_VEBOX4_RING_BASE }
+		},
+	},
+	[CCS0] = {
+		.class = COMPUTE_CLASS,
+		.instance = 0,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = GEN12_COMPUTE0_RING_BASE }
+		}
+	},
+	[CCS1] = {
+		.class = COMPUTE_CLASS,
+		.instance = 1,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = GEN12_COMPUTE1_RING_BASE }
+		}
+	},
+	[CCS2] = {
+		.class = COMPUTE_CLASS,
+		.instance = 2,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = GEN12_COMPUTE2_RING_BASE }
+		}
+	},
+	[CCS3] = {
+		.class = COMPUTE_CLASS,
+		.instance = 3,
+		.mmio_bases = {
+			{ .graphics_ver = 12, .base = GEN12_COMPUTE3_RING_BASE }
+		}
+	},
+};
+
+/**
+ * intel_engine_context_size() - return the size of the context for an engine
+ * @gt: the gt
+ * @class: engine class
+ *
+ * Each engine class may require a different amount of space for a context
+ * image.
+ *
+ * Return: size (in bytes) of an engine class specific context image
+ *
+ * Note: this size includes the HWSP, which is part of the context image
+ * in LRC mode, but does not include the "shared data page" used with
+ * GuC submission. The caller should account for this if using the GuC.
+ */
+u32 intel_engine_context_size(struct intel_gt *gt, u8 class)
+{
+	struct intel_uncore *uncore = gt->uncore;
+	u32 cxt_size;
+
+	BUILD_BUG_ON(I915_GTT_PAGE_SIZE != PAGE_SIZE);
+
+	switch (class) {
+	case COMPUTE_CLASS:
+		fallthrough;
+	case RENDER_CLASS:
+		switch (GRAPHICS_VER(gt->i915)) {
+		default:
+			MISSING_CASE(GRAPHICS_VER(gt->i915));
+			return DEFAULT_LR_CONTEXT_RENDER_SIZE;
+		case 12:
+		case 11:
+			return GEN11_LR_CONTEXT_RENDER_SIZE;
+		case 9:
+			return GEN9_LR_CONTEXT_RENDER_SIZE;
+		case 8:
+			return GEN8_LR_CONTEXT_RENDER_SIZE;
+		case 7:
+			if (IS_HASWELL(gt->i915))
+				return HSW_CXT_TOTAL_SIZE;
+
+			cxt_size = intel_uncore_read(uncore, GEN7_CXT_SIZE);
+			return round_up(GEN7_CXT_TOTAL_SIZE(cxt_size) * 64,
+					PAGE_SIZE);
+		case 6:
+			cxt_size = intel_uncore_read(uncore, CXT_SIZE);
+			return round_up(GEN6_CXT_TOTAL_SIZE(cxt_size) * 64,
+					PAGE_SIZE);
+		case 5:
+		case 4:
+			/*
+			 * There is a discrepancy here between the size reported
+			 * by the register and the size of the context layout
+			 * in the docs. Both are described as authorative!
+			 *
+			 * The discrepancy is on the order of a few cachelines,
+			 * but the total is under one page (4k), which is our
+			 * minimum allocation anyway so it should all come
+			 * out in the wash.
+			 */
+			cxt_size = intel_uncore_read(uncore, CXT_SIZE) + 1;
+			drm_dbg(&gt->i915->drm,
+				"graphics_ver = %d CXT_SIZE = %d bytes [0x%08x]\n",
+				GRAPHICS_VER(gt->i915), cxt_size * 64,
+				cxt_size - 1);
+			return round_up(cxt_size * 64, PAGE_SIZE);
+		case 3:
+		case 2:
+		/* For the special day when i810 gets merged. */
+		case 1:
+			return 0;
+		}
+		break;
+	default:
+		MISSING_CASE(class);
+		fallthrough;
+	case VIDEO_DECODE_CLASS:
+	case VIDEO_ENHANCEMENT_CLASS:
+	case COPY_ENGINE_CLASS:
+		if (GRAPHICS_VER(gt->i915) < 8)
+			return 0;
+		return GEN8_LR_CONTEXT_OTHER_SIZE;
+	}
+}
+
+static u32 __engine_mmio_base(struct drm_i915_private *i915,
+			      const struct engine_mmio_base *bases)
+{
+	int i;
+
+	for (i = 0; i < MAX_MMIO_BASES; i++)
+		if (GRAPHICS_VER(i915) >= bases[i].graphics_ver)
+			break;
+
+	GEM_BUG_ON(i == MAX_MMIO_BASES);
+	GEM_BUG_ON(!bases[i].base);
+
+	return bases[i].base;
+}
+
+static void __sprint_engine_name(struct intel_engine_cs *engine)
+{
+	/*
+	 * Before we know what the uABI name for this engine will be,
+	 * we still would like to keep track of this engine in the debug logs.
+	 * We throw in a ' here as a reminder that this isn't its final name.
+	 */
+	GEM_WARN_ON(snprintf(engine->name, sizeof(engine->name), "%s'%u",
+			     intel_engine_class_repr(engine->class),
+			     engine->instance) >= sizeof(engine->name));
+}
+
+void intel_engine_set_hwsp_writemask(struct intel_engine_cs *engine, u32 mask)
+{
+	/*
+	 * Though they added more rings on g4x/ilk, they did not add
+	 * per-engine HWSTAM until gen6.
+	 */
+	if (GRAPHICS_VER(engine->i915) < 6 && engine->class != RENDER_CLASS)
+		return;
+
+	if (GRAPHICS_VER(engine->i915) >= 3)
+		ENGINE_WRITE(engine, RING_HWSTAM, mask);
+	else
+		ENGINE_WRITE16(engine, RING_HWSTAM, mask);
+}
+
+static void intel_engine_sanitize_mmio(struct intel_engine_cs *engine)
+{
+	/* Mask off all writes into the unknown HWSP */
+	intel_engine_set_hwsp_writemask(engine, ~0u);
+}
+
+static void nop_irq_handler(struct intel_engine_cs *engine, u16 iir)
+{
+	GEM_DEBUG_WARN_ON(iir);
+}
+
+static u32 get_reset_domain(u8 ver, enum intel_engine_id id)
+{
+	u32 reset_domain;
+
+	if (ver >= 11) {
+		static const u32 engine_reset_domains[] = {
+			[RCS0]  = GEN11_GRDOM_RENDER,
+			[BCS0]  = GEN11_GRDOM_BLT,
+			[BCS1]  = XEHPC_GRDOM_BLT1,
+			[BCS2]  = XEHPC_GRDOM_BLT2,
+			[BCS3]  = XEHPC_GRDOM_BLT3,
+			[BCS4]  = XEHPC_GRDOM_BLT4,
+			[BCS5]  = XEHPC_GRDOM_BLT5,
+			[BCS6]  = XEHPC_GRDOM_BLT6,
+			[BCS7]  = XEHPC_GRDOM_BLT7,
+			[BCS8]  = XEHPC_GRDOM_BLT8,
+			[VCS0]  = GEN11_GRDOM_MEDIA,
+			[VCS1]  = GEN11_GRDOM_MEDIA2,
+			[VCS2]  = GEN11_GRDOM_MEDIA3,
+			[VCS3]  = GEN11_GRDOM_MEDIA4,
+			[VCS4]  = GEN11_GRDOM_MEDIA5,
+			[VCS5]  = GEN11_GRDOM_MEDIA6,
+			[VCS6]  = GEN11_GRDOM_MEDIA7,
+			[VCS7]  = GEN11_GRDOM_MEDIA8,
+			[VECS0] = GEN11_GRDOM_VECS,
+			[VECS1] = GEN11_GRDOM_VECS2,
+			[VECS2] = GEN11_GRDOM_VECS3,
+			[VECS3] = GEN11_GRDOM_VECS4,
+			[CCS0]  = GEN11_GRDOM_RENDER,
+			[CCS1]  = GEN11_GRDOM_RENDER,
+			[CCS2]  = GEN11_GRDOM_RENDER,
+			[CCS3]  = GEN11_GRDOM_RENDER,
+		};
+		GEM_BUG_ON(id >= ARRAY_SIZE(engine_reset_domains) ||
+			   !engine_reset_domains[id]);
+		reset_domain = engine_reset_domains[id];
+	} else {
+		static const u32 engine_reset_domains[] = {
+			[RCS0]  = GEN6_GRDOM_RENDER,
+			[BCS0]  = GEN6_GRDOM_BLT,
+			[VCS0]  = GEN6_GRDOM_MEDIA,
+			[VCS1]  = GEN8_GRDOM_MEDIA2,
+			[VECS0] = GEN6_GRDOM_VECS,
+		};
+		GEM_BUG_ON(id >= ARRAY_SIZE(engine_reset_domains) ||
+			   !engine_reset_domains[id]);
+		reset_domain = engine_reset_domains[id];
+	}
+
+	return reset_domain;
+}
+
+static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id,
+			      u8 logical_instance)
+{
+	const struct engine_info *info = &intel_engines[id];
+	struct drm_i915_private *i915 = gt->i915;
+	struct intel_engine_cs *engine;
+	u8 guc_class;
+
+	BUILD_BUG_ON(MAX_ENGINE_CLASS >= BIT(GEN11_ENGINE_CLASS_WIDTH));
+	BUILD_BUG_ON(MAX_ENGINE_INSTANCE >= BIT(GEN11_ENGINE_INSTANCE_WIDTH));
+	BUILD_BUG_ON(I915_MAX_VCS > (MAX_ENGINE_INSTANCE + 1));
+	BUILD_BUG_ON(I915_MAX_VECS > (MAX_ENGINE_INSTANCE + 1));
+
+	if (GEM_DEBUG_WARN_ON(id >= ARRAY_SIZE(gt->engine)))
+		return -EINVAL;
+
+	if (GEM_DEBUG_WARN_ON(info->class > MAX_ENGINE_CLASS))
+		return -EINVAL;
+
+	if (GEM_DEBUG_WARN_ON(info->instance > MAX_ENGINE_INSTANCE))
+		return -EINVAL;
+
+	if (GEM_DEBUG_WARN_ON(gt->engine_class[info->class][info->instance]))
+		return -EINVAL;
+
+	engine = kzalloc(sizeof(*engine), GFP_KERNEL);
+	if (!engine)
+		return -ENOMEM;
+
+	BUILD_BUG_ON(BITS_PER_TYPE(engine->mask) < I915_NUM_ENGINES);
+
+	INIT_LIST_HEAD(&engine->pinned_contexts_list);
+	engine->id = id;
+	engine->legacy_idx = INVALID_ENGINE;
+	engine->mask = BIT(id);
+	engine->reset_domain = get_reset_domain(GRAPHICS_VER(gt->i915),
+						id);
+	engine->i915 = i915;
+	engine->gt = gt;
+	engine->uncore = gt->uncore;
+	guc_class = engine_class_to_guc_class(info->class);
+	engine->guc_id = MAKE_GUC_ID(guc_class, info->instance);
+	engine->mmio_base = __engine_mmio_base(i915, info->mmio_bases);
+
+	engine->irq_handler = nop_irq_handler;
+
+	engine->class = info->class;
+	engine->instance = info->instance;
+	engine->logical_mask = BIT(logical_instance);
+	__sprint_engine_name(engine);
+
+	if ((engine->class == COMPUTE_CLASS && !RCS_MASK(engine->gt) &&
+	     __ffs(CCS_MASK(engine->gt)) == engine->instance) ||
+	     engine->class == RENDER_CLASS)
+		engine->flags |= I915_ENGINE_FIRST_RENDER_COMPUTE;
+
+	/* features common between engines sharing EUs */
+	if (engine->class == RENDER_CLASS || engine->class == COMPUTE_CLASS) {
+		engine->flags |= I915_ENGINE_HAS_RCS_REG_STATE;
+		engine->flags |= I915_ENGINE_HAS_EU_PRIORITY;
+	}
+
+	engine->props.heartbeat_interval_ms =
+		CONFIG_DRM_I915_HEARTBEAT_INTERVAL;
+	engine->props.max_busywait_duration_ns =
+		CONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT;
+	engine->props.preempt_timeout_ms =
+		CONFIG_DRM_I915_PREEMPT_TIMEOUT;
+	engine->props.stop_timeout_ms =
+		CONFIG_DRM_I915_STOP_TIMEOUT;
+	engine->props.timeslice_duration_ms =
+		CONFIG_DRM_I915_TIMESLICE_DURATION;
+
+	/* Override to uninterruptible for OpenCL workloads. */
+	if (GRAPHICS_VER(i915) == 12 && (engine->flags & I915_ENGINE_HAS_RCS_REG_STATE))
+		engine->props.preempt_timeout_ms = 0;
+
+	/* Cap properties according to any system limits */
+#define CLAMP_PROP(field) \
+	do { \
+		u64 clamp = intel_clamp_##field(engine, engine->props.field); \
+		if (clamp != engine->props.field) { \
+			drm_notice(&engine->i915->drm, \
+				   "Warning, clamping %s to %lld to prevent overflow\n", \
+				   #field, clamp); \
+			engine->props.field = clamp; \
+		} \
+	} while (0)
+
+	CLAMP_PROP(heartbeat_interval_ms);
+	CLAMP_PROP(max_busywait_duration_ns);
+	CLAMP_PROP(preempt_timeout_ms);
+	CLAMP_PROP(stop_timeout_ms);
+	CLAMP_PROP(timeslice_duration_ms);
+
+#undef CLAMP_PROP
+
+	engine->defaults = engine->props; /* never to change again */
+
+	engine->context_size = intel_engine_context_size(gt, engine->class);
+	if (WARN_ON(engine->context_size > BIT(20)))
+		engine->context_size = 0;
+	if (engine->context_size)
+		DRIVER_CAPS(i915)->has_logical_contexts = true;
+
+	ewma__engine_latency_init(&engine->latency);
+
+	ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier);
+
+	/* Scrub mmio state on takeover */
+	intel_engine_sanitize_mmio(engine);
+
+	gt->engine_class[info->class][info->instance] = engine;
+	gt->engine[id] = engine;
+
+	return 0;
+}
+
+u64 intel_clamp_heartbeat_interval_ms(struct intel_engine_cs *engine, u64 value)
+{
+	value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT));
+
+	return value;
+}
+
+u64 intel_clamp_max_busywait_duration_ns(struct intel_engine_cs *engine, u64 value)
+{
+	value = min(value, jiffies_to_nsecs(2));
+
+	return value;
+}
+
+u64 intel_clamp_preempt_timeout_ms(struct intel_engine_cs *engine, u64 value)
+{
+	/*
+	 * NB: The GuC API only supports 32bit values. However, the limit is further
+	 * reduced due to internal calculations which would otherwise overflow.
+	 */
+	if (intel_guc_submission_is_wanted(&engine->gt->uc.guc))
+		value = min_t(u64, value, guc_policy_max_preempt_timeout_ms());
+
+	value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT));
+
+	return value;
+}
+
+u64 intel_clamp_stop_timeout_ms(struct intel_engine_cs *engine, u64 value)
+{
+	value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT));
+
+	return value;
+}
+
+u64 intel_clamp_timeslice_duration_ms(struct intel_engine_cs *engine, u64 value)
+{
+	/*
+	 * NB: The GuC API only supports 32bit values. However, the limit is further
+	 * reduced due to internal calculations which would otherwise overflow.
+	 */
+	if (intel_guc_submission_is_wanted(&engine->gt->uc.guc))
+		value = min_t(u64, value, guc_policy_max_exec_quantum_ms());
+
+	value = min_t(u64, value, jiffies_to_msecs(MAX_SCHEDULE_TIMEOUT));
+
+	return value;
+}
+
+static void __setup_engine_capabilities(struct intel_engine_cs *engine)
+{
+	struct drm_i915_private *i915 = engine->i915;
+
+	if (engine->class == VIDEO_DECODE_CLASS) {
+		/*
+		 * HEVC support is present on first engine instance
+		 * before Gen11 and on all instances afterwards.
+		 */
+		if (GRAPHICS_VER(i915) >= 11 ||
+		    (GRAPHICS_VER(i915) >= 9 && engine->instance == 0))
+			engine->uabi_capabilities |=
+				I915_VIDEO_CLASS_CAPABILITY_HEVC;
+
+		/*
+		 * SFC block is present only on even logical engine
+		 * instances.
+		 */
+		if ((GRAPHICS_VER(i915) >= 11 &&
+		     (engine->gt->info.vdbox_sfc_access &
+		      BIT(engine->instance))) ||
+		    (GRAPHICS_VER(i915) >= 9 && engine->instance == 0))
+			engine->uabi_capabilities |=
+				I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC;
+	} else if (engine->class == VIDEO_ENHANCEMENT_CLASS) {
+		if (GRAPHICS_VER(i915) >= 9 &&
+		    engine->gt->info.sfc_mask & BIT(engine->instance))
+			engine->uabi_capabilities |=
+				I915_VIDEO_AND_ENHANCE_CLASS_CAPABILITY_SFC;
+	}
+}
+
+static void intel_setup_engine_capabilities(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	for_each_engine(engine, gt, id)
+		__setup_engine_capabilities(engine);
+}
+
+/**
+ * intel_engines_release() - free the resources allocated for Command Streamers
+ * @gt: pointer to struct intel_gt
+ */
+void intel_engines_release(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	/*
+	 * Before we release the resources held by engine, we must be certain
+	 * that the HW is no longer accessing them -- having the GPU scribble
+	 * to or read from a page being used for something else causes no end
+	 * of fun.
+	 *
+	 * The GPU should be reset by this point, but assume the worst just
+	 * in case we aborted before completely initialising the engines.
+	 */
+	GEM_BUG_ON(intel_gt_pm_is_awake(gt));
+	if (!INTEL_INFO(gt->i915)->gpu_reset_clobbers_display)
+		__intel_gt_reset(gt, ALL_ENGINES);
+
+	/* Decouple the backend; but keep the layout for late GPU resets */
+	for_each_engine(engine, gt, id) {
+		if (!engine->release)
+			continue;
+
+		intel_wakeref_wait_for_idle(&engine->wakeref);
+		GEM_BUG_ON(intel_engine_pm_is_awake(engine));
+
+		engine->release(engine);
+		engine->release = NULL;
+
+		memset(&engine->reset, 0, sizeof(engine->reset));
+	}
+}
+
+void intel_engine_free_request_pool(struct intel_engine_cs *engine)
+{
+	if (!engine->request_pool)
+		return;
+
+	kmem_cache_free(i915_request_slab_cache(), engine->request_pool);
+}
+
+void intel_engines_free(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	/* Free the requests! dma-resv keeps fences around for an eternity */
+	rcu_barrier();
+
+	for_each_engine(engine, gt, id) {
+		intel_engine_free_request_pool(engine);
+		kfree(engine);
+		gt->engine[id] = NULL;
+	}
+}
+
+static
+bool gen11_vdbox_has_sfc(struct intel_gt *gt,
+			 unsigned int physical_vdbox,
+			 unsigned int logical_vdbox, u16 vdbox_mask)
+{
+	struct drm_i915_private *i915 = gt->i915;
+
+	/*
+	 * In Gen11, only even numbered logical VDBOXes are hooked
+	 * up to an SFC (Scaler & Format Converter) unit.
+	 * In Gen12, Even numbered physical instance always are connected
+	 * to an SFC. Odd numbered physical instances have SFC only if
+	 * previous even instance is fused off.
+	 *
+	 * Starting with Xe_HP, there's also a dedicated SFC_ENABLE field
+	 * in the fuse register that tells us whether a specific SFC is present.
+	 */
+	if ((gt->info.sfc_mask & BIT(physical_vdbox / 2)) == 0)
+		return false;
+	else if (MEDIA_VER(i915) >= 12)
+		return (physical_vdbox % 2 == 0) ||
+			!(BIT(physical_vdbox - 1) & vdbox_mask);
+	else if (MEDIA_VER(i915) == 11)
+		return logical_vdbox % 2 == 0;
+
+	return false;
+}
+
+static void engine_mask_apply_media_fuses(struct intel_gt *gt)
+{
+	struct drm_i915_private *i915 = gt->i915;
+	unsigned int logical_vdbox = 0;
+	unsigned int i;
+	u32 media_fuse, fuse1;
+	u16 vdbox_mask;
+	u16 vebox_mask;
+
+	if (MEDIA_VER(gt->i915) < 11)
+		return;
+
+	/*
+	 * On newer platforms the fusing register is called 'enable' and has
+	 * enable semantics, while on older platforms it is called 'disable'
+	 * and bits have disable semantices.
+	 */
+	media_fuse = intel_uncore_read(gt->uncore, GEN11_GT_VEBOX_VDBOX_DISABLE);
+	if (MEDIA_VER_FULL(i915) < IP_VER(12, 50))
+		media_fuse = ~media_fuse;
+
+	vdbox_mask = media_fuse & GEN11_GT_VDBOX_DISABLE_MASK;
+	vebox_mask = (media_fuse & GEN11_GT_VEBOX_DISABLE_MASK) >>
+		      GEN11_GT_VEBOX_DISABLE_SHIFT;
+
+	if (MEDIA_VER_FULL(i915) >= IP_VER(12, 50)) {
+		fuse1 = intel_uncore_read(gt->uncore, HSW_PAVP_FUSE1);
+		gt->info.sfc_mask = REG_FIELD_GET(XEHP_SFC_ENABLE_MASK, fuse1);
+	} else {
+		gt->info.sfc_mask = ~0;
+	}
+
+	for (i = 0; i < I915_MAX_VCS; i++) {
+		if (!HAS_ENGINE(gt, _VCS(i))) {
+			vdbox_mask &= ~BIT(i);
+			continue;
+		}
+
+		if (!(BIT(i) & vdbox_mask)) {
+			gt->info.engine_mask &= ~BIT(_VCS(i));
+			drm_dbg(&i915->drm, "vcs%u fused off\n", i);
+			continue;
+		}
+
+		if (gen11_vdbox_has_sfc(gt, i, logical_vdbox, vdbox_mask))
+			gt->info.vdbox_sfc_access |= BIT(i);
+		logical_vdbox++;
+	}
+	drm_dbg(&i915->drm, "vdbox enable: %04x, instances: %04lx\n",
+		vdbox_mask, VDBOX_MASK(gt));
+	GEM_BUG_ON(vdbox_mask != VDBOX_MASK(gt));
+
+	for (i = 0; i < I915_MAX_VECS; i++) {
+		if (!HAS_ENGINE(gt, _VECS(i))) {
+			vebox_mask &= ~BIT(i);
+			continue;
+		}
+
+		if (!(BIT(i) & vebox_mask)) {
+			gt->info.engine_mask &= ~BIT(_VECS(i));
+			drm_dbg(&i915->drm, "vecs%u fused off\n", i);
+		}
+	}
+	drm_dbg(&i915->drm, "vebox enable: %04x, instances: %04lx\n",
+		vebox_mask, VEBOX_MASK(gt));
+	GEM_BUG_ON(vebox_mask != VEBOX_MASK(gt));
+}
+
+static void engine_mask_apply_compute_fuses(struct intel_gt *gt)
+{
+	struct drm_i915_private *i915 = gt->i915;
+	struct intel_gt_info *info = &gt->info;
+	int ss_per_ccs = info->sseu.max_subslices / I915_MAX_CCS;
+	unsigned long ccs_mask;
+	unsigned int i;
+
+	if (GRAPHICS_VER(i915) < 11)
+		return;
+
+	if (hweight32(CCS_MASK(gt)) <= 1)
+		return;
+
+	ccs_mask = intel_slicemask_from_xehp_dssmask(info->sseu.compute_subslice_mask,
+						     ss_per_ccs);
+	/*
+	 * If all DSS in a quadrant are fused off, the corresponding CCS
+	 * engine is not available for use.
+	 */
+	for_each_clear_bit(i, &ccs_mask, I915_MAX_CCS) {
+		info->engine_mask &= ~BIT(_CCS(i));
+		drm_dbg(&i915->drm, "ccs%u fused off\n", i);
+	}
+}
+
+static void engine_mask_apply_copy_fuses(struct intel_gt *gt)
+{
+	struct drm_i915_private *i915 = gt->i915;
+	struct intel_gt_info *info = &gt->info;
+	unsigned long meml3_mask;
+	unsigned long quad;
+
+	if (!(GRAPHICS_VER_FULL(i915) >= IP_VER(12, 60) &&
+	      GRAPHICS_VER_FULL(i915) < IP_VER(12, 70)))
+		return;
+
+	meml3_mask = intel_uncore_read(gt->uncore, GEN10_MIRROR_FUSE3);
+	meml3_mask = REG_FIELD_GET(GEN12_MEML3_EN_MASK, meml3_mask);
+
+	/*
+	 * Link Copy engines may be fused off according to meml3_mask. Each
+	 * bit is a quad that houses 2 Link Copy and two Sub Copy engines.
+	 */
+	for_each_clear_bit(quad, &meml3_mask, GEN12_MAX_MSLICES) {
+		unsigned int instance = quad * 2 + 1;
+		intel_engine_mask_t mask = GENMASK(_BCS(instance + 1),
+						   _BCS(instance));
+
+		if (mask & info->engine_mask) {
+			drm_dbg(&i915->drm, "bcs%u fused off\n", instance);
+			drm_dbg(&i915->drm, "bcs%u fused off\n", instance + 1);
+
+			info->engine_mask &= ~mask;
+		}
+	}
+}
+
+/*
+ * Determine which engines are fused off in our particular hardware.
+ * Note that we have a catch-22 situation where we need to be able to access
+ * the blitter forcewake domain to read the engine fuses, but at the same time
+ * we need to know which engines are available on the system to know which
+ * forcewake domains are present. We solve this by intializing the forcewake
+ * domains based on the full engine mask in the platform capabilities before
+ * calling this function and pruning the domains for fused-off engines
+ * afterwards.
+ */
+static intel_engine_mask_t init_engine_mask(struct intel_gt *gt)
+{
+	struct intel_gt_info *info = &gt->info;
+
+	GEM_BUG_ON(!info->engine_mask);
+
+	engine_mask_apply_media_fuses(gt);
+	engine_mask_apply_compute_fuses(gt);
+	engine_mask_apply_copy_fuses(gt);
+
+	return info->engine_mask;
+}
+
+static void populate_logical_ids(struct intel_gt *gt, u8 *logical_ids,
+				 u8 class, const u8 *map, u8 num_instances)
+{
+	int i, j;
+	u8 current_logical_id = 0;
+
+	for (j = 0; j < num_instances; ++j) {
+		for (i = 0; i < ARRAY_SIZE(intel_engines); ++i) {
+			if (!HAS_ENGINE(gt, i) ||
+			    intel_engines[i].class != class)
+				continue;
+
+			if (intel_engines[i].instance == map[j]) {
+				logical_ids[intel_engines[i].instance] =
+					current_logical_id++;
+				break;
+			}
+		}
+	}
+}
+
+static void setup_logical_ids(struct intel_gt *gt, u8 *logical_ids, u8 class)
+{
+	/*
+	 * Logical to physical mapping is needed for proper support
+	 * to split-frame feature.
+	 */
+	if (MEDIA_VER(gt->i915) >= 11 && class == VIDEO_DECODE_CLASS) {
+		const u8 map[] = { 0, 2, 4, 6, 1, 3, 5, 7 };
+
+		populate_logical_ids(gt, logical_ids, class,
+				     map, ARRAY_SIZE(map));
+	} else {
+		int i;
+		u8 map[MAX_ENGINE_INSTANCE + 1];
+
+		for (i = 0; i < MAX_ENGINE_INSTANCE + 1; ++i)
+			map[i] = i;
+		populate_logical_ids(gt, logical_ids, class,
+				     map, ARRAY_SIZE(map));
+	}
+}
+
+/**
+ * intel_engines_init_mmio() - allocate and prepare the Engine Command Streamers
+ * @gt: pointer to struct intel_gt
+ *
+ * Return: non-zero if the initialization failed.
+ */
+int intel_engines_init_mmio(struct intel_gt *gt)
+{
+	struct drm_i915_private *i915 = gt->i915;
+	const unsigned int engine_mask = init_engine_mask(gt);
+	unsigned int mask = 0;
+	unsigned int i, class;
+	u8 logical_ids[MAX_ENGINE_INSTANCE + 1];
+	int err;
+
+	drm_WARN_ON(&i915->drm, engine_mask == 0);
+	drm_WARN_ON(&i915->drm, engine_mask &
+		    GENMASK(BITS_PER_TYPE(mask) - 1, I915_NUM_ENGINES));
+
+	if (i915_inject_probe_failure(i915))
+		return -ENODEV;
+
+	for (class = 0; class < MAX_ENGINE_CLASS + 1; ++class) {
+		setup_logical_ids(gt, logical_ids, class);
+
+		for (i = 0; i < ARRAY_SIZE(intel_engines); ++i) {
+			u8 instance = intel_engines[i].instance;
+
+			if (intel_engines[i].class != class ||
+			    !HAS_ENGINE(gt, i))
+				continue;
+
+			err = intel_engine_setup(gt, i,
+						 logical_ids[instance]);
+			if (err)
+				goto cleanup;
+
+			mask |= BIT(i);
+		}
+	}
+
+	/*
+	 * Catch failures to update intel_engines table when the new engines
+	 * are added to the driver by a warning and disabling the forgotten
+	 * engines.
+	 */
+	if (drm_WARN_ON(&i915->drm, mask != engine_mask))
+		gt->info.engine_mask = mask;
+
+	gt->info.num_engines = hweight32(mask);
+
+	intel_gt_check_and_clear_faults(gt);
+
+	intel_setup_engine_capabilities(gt);
+
+	intel_uncore_prune_engine_fw_domains(gt->uncore, gt);
+
+	return 0;
+
+cleanup:
+	intel_engines_free(gt);
+	return err;
+}
+
+void intel_engine_init_execlists(struct intel_engine_cs *engine)
+{
+	struct intel_engine_execlists * const execlists = &engine->execlists;
+
+	execlists->port_mask = 1;
+	GEM_BUG_ON(!is_power_of_2(execlists_num_ports(execlists)));
+	GEM_BUG_ON(execlists_num_ports(execlists) > EXECLIST_MAX_PORTS);
+
+	memset(execlists->pending, 0, sizeof(execlists->pending));
+	execlists->active =
+		memset(execlists->inflight, 0, sizeof(execlists->inflight));
+}
+
+static void cleanup_status_page(struct intel_engine_cs *engine)
+{
+	struct i915_vma *vma;
+
+	/* Prevent writes into HWSP after returning the page to the system */
+	intel_engine_set_hwsp_writemask(engine, ~0u);
+
+	vma = fetch_and_zero(&engine->status_page.vma);
+	if (!vma)
+		return;
+
+	if (!HWS_NEEDS_PHYSICAL(engine->i915))
+		i915_vma_unpin(vma);
+
+	i915_gem_object_unpin_map(vma->obj);
+	i915_gem_object_put(vma->obj);
+}
+
+static int pin_ggtt_status_page(struct intel_engine_cs *engine,
+				struct i915_gem_ww_ctx *ww,
+				struct i915_vma *vma)
+{
+	unsigned int flags;
+
+	if (!HAS_LLC(engine->i915) && i915_ggtt_has_aperture(engine->gt->ggtt))
+		/*
+		 * On g33, we cannot place HWS above 256MiB, so
+		 * restrict its pinning to the low mappable arena.
+		 * Though this restriction is not documented for
+		 * gen4, gen5, or byt, they also behave similarly
+		 * and hang if the HWS is placed at the top of the
+		 * GTT. To generalise, it appears that all !llc
+		 * platforms have issues with us placing the HWS
+		 * above the mappable region (even though we never
+		 * actually map it).
+		 */
+		flags = PIN_MAPPABLE;
+	else
+		flags = PIN_HIGH;
+
+	return i915_ggtt_pin(vma, ww, 0, flags);
+}
+
+static int init_status_page(struct intel_engine_cs *engine)
+{
+	struct drm_i915_gem_object *obj;
+	struct i915_gem_ww_ctx ww;
+	struct i915_vma *vma;
+	void *vaddr;
+	int ret;
+
+	INIT_LIST_HEAD(&engine->status_page.timelines);
+
+	/*
+	 * Though the HWS register does support 36bit addresses, historically
+	 * we have had hangs and corruption reported due to wild writes if
+	 * the HWS is placed above 4G. We only allow objects to be allocated
+	 * in GFP_DMA32 for i965, and no earlier physical address users had
+	 * access to more than 4G.
+	 */
+	obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE);
+	if (IS_ERR(obj)) {
+		drm_err(&engine->i915->drm,
+			"Failed to allocate status page\n");
+		return PTR_ERR(obj);
+	}
+
+	i915_gem_object_set_cache_coherency(obj, I915_CACHE_LLC);
+
+	vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL);
+	if (IS_ERR(vma)) {
+		ret = PTR_ERR(vma);
+		goto err_put;
+	}
+
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	ret = i915_gem_object_lock(obj, &ww);
+	if (!ret && !HWS_NEEDS_PHYSICAL(engine->i915))
+		ret = pin_ggtt_status_page(engine, &ww, vma);
+	if (ret)
+		goto err;
+
+	vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
+	if (IS_ERR(vaddr)) {
+		ret = PTR_ERR(vaddr);
+		goto err_unpin;
+	}
+
+	engine->status_page.addr = memset(vaddr, 0, PAGE_SIZE);
+	engine->status_page.vma = vma;
+
+err_unpin:
+	if (ret)
+		i915_vma_unpin(vma);
+err:
+	if (ret == -EDEADLK) {
+		ret = i915_gem_ww_ctx_backoff(&ww);
+		if (!ret)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+err_put:
+	if (ret)
+		i915_gem_object_put(obj);
+	return ret;
+}
+
+static int engine_setup_common(struct intel_engine_cs *engine)
+{
+	int err;
+
+	init_llist_head(&engine->barrier_tasks);
+
+	err = init_status_page(engine);
+	if (err)
+		return err;
+
+	engine->breadcrumbs = intel_breadcrumbs_create(engine);
+	if (!engine->breadcrumbs) {
+		err = -ENOMEM;
+		goto err_status;
+	}
+
+	engine->sched_engine = i915_sched_engine_create(ENGINE_PHYSICAL);
+	if (!engine->sched_engine) {
+		err = -ENOMEM;
+		goto err_sched_engine;
+	}
+	engine->sched_engine->private_data = engine;
+
+	err = intel_engine_init_cmd_parser(engine);
+	if (err)
+		goto err_cmd_parser;
+
+	intel_engine_init_execlists(engine);
+	intel_engine_init__pm(engine);
+	intel_engine_init_retire(engine);
+
+	/* Use the whole device by default */
+	engine->sseu =
+		intel_sseu_from_device_info(&engine->gt->info.sseu);
+
+	intel_engine_init_workarounds(engine);
+	intel_engine_init_whitelist(engine);
+	intel_engine_init_ctx_wa(engine);
+
+	if (GRAPHICS_VER(engine->i915) >= 12)
+		engine->flags |= I915_ENGINE_HAS_RELATIVE_MMIO;
+
+	return 0;
+
+err_cmd_parser:
+	i915_sched_engine_put(engine->sched_engine);
+err_sched_engine:
+	intel_breadcrumbs_put(engine->breadcrumbs);
+err_status:
+	cleanup_status_page(engine);
+	return err;
+}
+
+struct measure_breadcrumb {
+	struct i915_request rq;
+	struct intel_ring ring;
+	u32 cs[2048];
+};
+
+static int measure_breadcrumb_dw(struct intel_context *ce)
+{
+	struct intel_engine_cs *engine = ce->engine;
+	struct measure_breadcrumb *frame;
+	int dw;
+
+	GEM_BUG_ON(!engine->gt->scratch);
+
+	frame = kzalloc(sizeof(*frame), GFP_KERNEL);
+	if (!frame)
+		return -ENOMEM;
+
+	frame->rq.engine = engine;
+	frame->rq.context = ce;
+	rcu_assign_pointer(frame->rq.timeline, ce->timeline);
+	frame->rq.hwsp_seqno = ce->timeline->hwsp_seqno;
+
+	frame->ring.vaddr = frame->cs;
+	frame->ring.size = sizeof(frame->cs);
+	frame->ring.wrap =
+		BITS_PER_TYPE(frame->ring.size) - ilog2(frame->ring.size);
+	frame->ring.effective_size = frame->ring.size;
+	intel_ring_update_space(&frame->ring);
+	frame->rq.ring = &frame->ring;
+
+	mutex_lock(&ce->timeline->mutex);
+	spin_lock_irq(&engine->sched_engine->lock);
+
+	dw = engine->emit_fini_breadcrumb(&frame->rq, frame->cs) - frame->cs;
+
+	spin_unlock_irq(&engine->sched_engine->lock);
+	mutex_unlock(&ce->timeline->mutex);
+
+	GEM_BUG_ON(dw & 1); /* RING_TAIL must be qword aligned */
+
+	kfree(frame);
+	return dw;
+}
+
+struct intel_context *
+intel_engine_create_pinned_context(struct intel_engine_cs *engine,
+				   struct i915_address_space *vm,
+				   unsigned int ring_size,
+				   unsigned int hwsp,
+				   struct lock_class_key *key,
+				   const char *name)
+{
+	struct intel_context *ce;
+	int err;
+
+	ce = intel_context_create(engine);
+	if (IS_ERR(ce))
+		return ce;
+
+	__set_bit(CONTEXT_BARRIER_BIT, &ce->flags);
+	ce->timeline = page_pack_bits(NULL, hwsp);
+	ce->ring = NULL;
+	ce->ring_size = ring_size;
+
+	i915_vm_put(ce->vm);
+	ce->vm = i915_vm_get(vm);
+
+	err = intel_context_pin(ce); /* perma-pin so it is always available */
+	if (err) {
+		intel_context_put(ce);
+		return ERR_PTR(err);
+	}
+
+	list_add_tail(&ce->pinned_contexts_link, &engine->pinned_contexts_list);
+
+	/*
+	 * Give our perma-pinned kernel timelines a separate lockdep class,
+	 * so that we can use them from within the normal user timelines
+	 * should we need to inject GPU operations during their request
+	 * construction.
+	 */
+	lockdep_set_class_and_name(&ce->timeline->mutex, key, name);
+
+	return ce;
+}
+
+void intel_engine_destroy_pinned_context(struct intel_context *ce)
+{
+	struct intel_engine_cs *engine = ce->engine;
+	struct i915_vma *hwsp = engine->status_page.vma;
+
+	GEM_BUG_ON(ce->timeline->hwsp_ggtt != hwsp);
+
+	mutex_lock(&hwsp->vm->mutex);
+	list_del(&ce->timeline->engine_link);
+	mutex_unlock(&hwsp->vm->mutex);
+
+	list_del(&ce->pinned_contexts_link);
+	intel_context_unpin(ce);
+	intel_context_put(ce);
+}
+
+static struct intel_context *
+create_kernel_context(struct intel_engine_cs *engine)
+{
+	static struct lock_class_key kernel;
+
+	return intel_engine_create_pinned_context(engine, engine->gt->vm, SZ_4K,
+						  I915_GEM_HWS_SEQNO_ADDR,
+						  &kernel, "kernel_context");
+}
+
+/**
+ * intel_engines_init_common - initialize cengine state which might require hw access
+ * @engine: Engine to initialize.
+ *
+ * Initializes @engine@ structure members shared between legacy and execlists
+ * submission modes which do require hardware access.
+ *
+ * Typcally done at later stages of submission mode specific engine setup.
+ *
+ * Returns zero on success or an error code on failure.
+ */
+static int engine_init_common(struct intel_engine_cs *engine)
+{
+	struct intel_context *ce;
+	int ret;
+
+	engine->set_default_submission(engine);
+
+	/*
+	 * We may need to do things with the shrinker which
+	 * require us to immediately switch back to the default
+	 * context. This can cause a problem as pinning the
+	 * default context also requires GTT space which may not
+	 * be available. To avoid this we always pin the default
+	 * context.
+	 */
+	ce = create_kernel_context(engine);
+	if (IS_ERR(ce))
+		return PTR_ERR(ce);
+
+	ret = measure_breadcrumb_dw(ce);
+	if (ret < 0)
+		goto err_context;
+
+	engine->emit_fini_breadcrumb_dw = ret;
+	engine->kernel_context = ce;
+
+	return 0;
+
+err_context:
+	intel_engine_destroy_pinned_context(ce);
+	return ret;
+}
+
+int intel_engines_init(struct intel_gt *gt)
+{
+	int (*setup)(struct intel_engine_cs *engine);
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	int err;
+
+	if (intel_uc_uses_guc_submission(&gt->uc)) {
+		gt->submission_method = INTEL_SUBMISSION_GUC;
+		setup = intel_guc_submission_setup;
+	} else if (HAS_EXECLISTS(gt->i915)) {
+		gt->submission_method = INTEL_SUBMISSION_ELSP;
+		setup = intel_execlists_submission_setup;
+	} else {
+		gt->submission_method = INTEL_SUBMISSION_RING;
+		setup = intel_ring_submission_setup;
+	}
+
+	for_each_engine(engine, gt, id) {
+		err = engine_setup_common(engine);
+		if (err)
+			return err;
+
+		err = setup(engine);
+		if (err) {
+			intel_engine_cleanup_common(engine);
+			return err;
+		}
+
+		/* The backend should now be responsible for cleanup */
+		GEM_BUG_ON(engine->release == NULL);
+
+		err = engine_init_common(engine);
+		if (err)
+			return err;
+
+		intel_engine_add_user(engine);
+	}
+
+	return 0;
+}
+
+/**
+ * intel_engines_cleanup_common - cleans up the engine state created by
+ *                                the common initiailizers.
+ * @engine: Engine to cleanup.
+ *
+ * This cleans up everything created by the common helpers.
+ */
+void intel_engine_cleanup_common(struct intel_engine_cs *engine)
+{
+	GEM_BUG_ON(!list_empty(&engine->sched_engine->requests));
+
+	i915_sched_engine_put(engine->sched_engine);
+	intel_breadcrumbs_put(engine->breadcrumbs);
+
+	intel_engine_fini_retire(engine);
+	intel_engine_cleanup_cmd_parser(engine);
+
+	if (engine->default_state)
+		fput(engine->default_state);
+
+	if (engine->kernel_context)
+		intel_engine_destroy_pinned_context(engine->kernel_context);
+
+	GEM_BUG_ON(!llist_empty(&engine->barrier_tasks));
+	cleanup_status_page(engine);
+
+	intel_wa_list_free(&engine->ctx_wa_list);
+	intel_wa_list_free(&engine->wa_list);
+	intel_wa_list_free(&engine->whitelist);
+}
+
+/**
+ * intel_engine_resume - re-initializes the HW state of the engine
+ * @engine: Engine to resume.
+ *
+ * Returns zero on success or an error code on failure.
+ */
+int intel_engine_resume(struct intel_engine_cs *engine)
+{
+	intel_engine_apply_workarounds(engine);
+	intel_engine_apply_whitelist(engine);
+
+	return engine->resume(engine);
+}
+
+u64 intel_engine_get_active_head(const struct intel_engine_cs *engine)
+{
+	struct drm_i915_private *i915 = engine->i915;
+
+	u64 acthd;
+
+	if (GRAPHICS_VER(i915) >= 8)
+		acthd = ENGINE_READ64(engine, RING_ACTHD, RING_ACTHD_UDW);
+	else if (GRAPHICS_VER(i915) >= 4)
+		acthd = ENGINE_READ(engine, RING_ACTHD);
+	else
+		acthd = ENGINE_READ(engine, ACTHD);
+
+	return acthd;
+}
+
+u64 intel_engine_get_last_batch_head(const struct intel_engine_cs *engine)
+{
+	u64 bbaddr;
+
+	if (GRAPHICS_VER(engine->i915) >= 8)
+		bbaddr = ENGINE_READ64(engine, RING_BBADDR, RING_BBADDR_UDW);
+	else
+		bbaddr = ENGINE_READ(engine, RING_BBADDR);
+
+	return bbaddr;
+}
+
+static unsigned long stop_timeout(const struct intel_engine_cs *engine)
+{
+	if (in_atomic() || irqs_disabled()) /* inside atomic preempt-reset? */
+		return 0;
+
+	/*
+	 * If we are doing a normal GPU reset, we can take our time and allow
+	 * the engine to quiesce. We've stopped submission to the engine, and
+	 * if we wait long enough an innocent context should complete and
+	 * leave the engine idle. So they should not be caught unaware by
+	 * the forthcoming GPU reset (which usually follows the stop_cs)!
+	 */
+	return READ_ONCE(engine->props.stop_timeout_ms);
+}
+
+static int __intel_engine_stop_cs(struct intel_engine_cs *engine,
+				  int fast_timeout_us,
+				  int slow_timeout_ms)
+{
+	struct intel_uncore *uncore = engine->uncore;
+	const i915_reg_t mode = RING_MI_MODE(engine->mmio_base);
+	int err;
+
+	intel_uncore_write_fw(uncore, mode, _MASKED_BIT_ENABLE(STOP_RING));
+
+	/*
+	 * Wa_22011802037 : gen11, gen12, Prior to doing a reset, ensure CS is
+	 * stopped, set ring stop bit and prefetch disable bit to halt CS
+	 */
+	if (IS_GRAPHICS_VER(engine->i915, 11, 12))
+		intel_uncore_write_fw(uncore, RING_MODE_GEN7(engine->mmio_base),
+				      _MASKED_BIT_ENABLE(GEN12_GFX_PREFETCH_DISABLE));
+
+	err = __intel_wait_for_register_fw(engine->uncore, mode,
+					   MODE_IDLE, MODE_IDLE,
+					   fast_timeout_us,
+					   slow_timeout_ms,
+					   NULL);
+
+	/* A final mmio read to let GPU writes be hopefully flushed to memory */
+	intel_uncore_posting_read_fw(uncore, mode);
+	return err;
+}
+
+int intel_engine_stop_cs(struct intel_engine_cs *engine)
+{
+	int err = 0;
+
+	if (GRAPHICS_VER(engine->i915) < 3)
+		return -ENODEV;
+
+	ENGINE_TRACE(engine, "\n");
+	/*
+	 * TODO: Find out why occasionally stopping the CS times out. Seen
+	 * especially with gem_eio tests.
+	 *
+	 * Occasionally trying to stop the cs times out, but does not adversely
+	 * affect functionality. The timeout is set as a config parameter that
+	 * defaults to 100ms. In most cases the follow up operation is to wait
+	 * for pending MI_FORCE_WAKES. The assumption is that this timeout is
+	 * sufficient for any pending MI_FORCEWAKEs to complete. Once root
+	 * caused, the caller must check and handle the return from this
+	 * function.
+	 */
+	if (__intel_engine_stop_cs(engine, 1000, stop_timeout(engine))) {
+		ENGINE_TRACE(engine,
+			     "timed out on STOP_RING -> IDLE; HEAD:%04x, TAIL:%04x\n",
+			     ENGINE_READ_FW(engine, RING_HEAD) & HEAD_ADDR,
+			     ENGINE_READ_FW(engine, RING_TAIL) & TAIL_ADDR);
+
+		/*
+		 * Sometimes we observe that the idle flag is not
+		 * set even though the ring is empty. So double
+		 * check before giving up.
+		 */
+		if ((ENGINE_READ_FW(engine, RING_HEAD) & HEAD_ADDR) !=
+		    (ENGINE_READ_FW(engine, RING_TAIL) & TAIL_ADDR))
+			err = -ETIMEDOUT;
+	}
+
+	return err;
+}
+
+void intel_engine_cancel_stop_cs(struct intel_engine_cs *engine)
+{
+	ENGINE_TRACE(engine, "\n");
+
+	ENGINE_WRITE_FW(engine, RING_MI_MODE, _MASKED_BIT_DISABLE(STOP_RING));
+}
+
+static u32 __cs_pending_mi_force_wakes(struct intel_engine_cs *engine)
+{
+	static const i915_reg_t _reg[I915_NUM_ENGINES] = {
+		[RCS0] = MSG_IDLE_CS,
+		[BCS0] = MSG_IDLE_BCS,
+		[VCS0] = MSG_IDLE_VCS0,
+		[VCS1] = MSG_IDLE_VCS1,
+		[VCS2] = MSG_IDLE_VCS2,
+		[VCS3] = MSG_IDLE_VCS3,
+		[VCS4] = MSG_IDLE_VCS4,
+		[VCS5] = MSG_IDLE_VCS5,
+		[VCS6] = MSG_IDLE_VCS6,
+		[VCS7] = MSG_IDLE_VCS7,
+		[VECS0] = MSG_IDLE_VECS0,
+		[VECS1] = MSG_IDLE_VECS1,
+		[VECS2] = MSG_IDLE_VECS2,
+		[VECS3] = MSG_IDLE_VECS3,
+		[CCS0] = MSG_IDLE_CS,
+		[CCS1] = MSG_IDLE_CS,
+		[CCS2] = MSG_IDLE_CS,
+		[CCS3] = MSG_IDLE_CS,
+	};
+	u32 val;
+
+	if (!_reg[engine->id].reg) {
+		drm_err(&engine->i915->drm,
+			"MSG IDLE undefined for engine id %u\n", engine->id);
+		return 0;
+	}
+
+	val = intel_uncore_read(engine->uncore, _reg[engine->id]);
+
+	/* bits[29:25] & bits[13:9] >> shift */
+	return (val & (val >> 16) & MSG_IDLE_FW_MASK) >> MSG_IDLE_FW_SHIFT;
+}
+
+static void __gpm_wait_for_fw_complete(struct intel_gt *gt, u32 fw_mask)
+{
+	int ret;
+
+	/* Ensure GPM receives fw up/down after CS is stopped */
+	udelay(1);
+
+	/* Wait for forcewake request to complete in GPM */
+	ret =  __intel_wait_for_register_fw(gt->uncore,
+					    GEN9_PWRGT_DOMAIN_STATUS,
+					    fw_mask, fw_mask, 5000, 0, NULL);
+
+	/* Ensure CS receives fw ack from GPM */
+	udelay(1);
+
+	if (ret)
+		GT_TRACE(gt, "Failed to complete pending forcewake %d\n", ret);
+}
+
+/*
+ * Wa_22011802037:gen12: In addition to stopping the cs, we need to wait for any
+ * pending MI_FORCE_WAKEUP requests that the CS has initiated to complete. The
+ * pending status is indicated by bits[13:9] (masked by bits[29:25]) in the
+ * MSG_IDLE register. There's one MSG_IDLE register per reset domain. Since we
+ * are concerned only with the gt reset here, we use a logical OR of pending
+ * forcewakeups from all reset domains and then wait for them to complete by
+ * querying PWRGT_DOMAIN_STATUS.
+ */
+void intel_engine_wait_for_pending_mi_fw(struct intel_engine_cs *engine)
+{
+	u32 fw_pending = __cs_pending_mi_force_wakes(engine);
+
+	if (fw_pending)
+		__gpm_wait_for_fw_complete(engine->gt, fw_pending);
+}
+
+/* NB: please notice the memset */
+void intel_engine_get_instdone(const struct intel_engine_cs *engine,
+			       struct intel_instdone *instdone)
+{
+	struct drm_i915_private *i915 = engine->i915;
+	struct intel_uncore *uncore = engine->uncore;
+	u32 mmio_base = engine->mmio_base;
+	int slice;
+	int subslice;
+	int iter;
+
+	memset(instdone, 0, sizeof(*instdone));
+
+	if (GRAPHICS_VER(i915) >= 8) {
+		instdone->instdone =
+			intel_uncore_read(uncore, RING_INSTDONE(mmio_base));
+
+		if (engine->id != RCS0)
+			return;
+
+		instdone->slice_common =
+			intel_uncore_read(uncore, GEN7_SC_INSTDONE);
+		if (GRAPHICS_VER(i915) >= 12) {
+			instdone->slice_common_extra[0] =
+				intel_uncore_read(uncore, GEN12_SC_INSTDONE_EXTRA);
+			instdone->slice_common_extra[1] =
+				intel_uncore_read(uncore, GEN12_SC_INSTDONE_EXTRA2);
+		}
+
+		for_each_ss_steering(iter, engine->gt, slice, subslice) {
+			instdone->sampler[slice][subslice] =
+				intel_gt_mcr_read(engine->gt,
+						  GEN7_SAMPLER_INSTDONE,
+						  slice, subslice);
+			instdone->row[slice][subslice] =
+				intel_gt_mcr_read(engine->gt,
+						  GEN7_ROW_INSTDONE,
+						  slice, subslice);
+		}
+
+		if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 55)) {
+			for_each_ss_steering(iter, engine->gt, slice, subslice)
+				instdone->geom_svg[slice][subslice] =
+					intel_gt_mcr_read(engine->gt,
+							  XEHPG_INSTDONE_GEOM_SVG,
+							  slice, subslice);
+		}
+	} else if (GRAPHICS_VER(i915) >= 7) {
+		instdone->instdone =
+			intel_uncore_read(uncore, RING_INSTDONE(mmio_base));
+
+		if (engine->id != RCS0)
+			return;
+
+		instdone->slice_common =
+			intel_uncore_read(uncore, GEN7_SC_INSTDONE);
+		instdone->sampler[0][0] =
+			intel_uncore_read(uncore, GEN7_SAMPLER_INSTDONE);
+		instdone->row[0][0] =
+			intel_uncore_read(uncore, GEN7_ROW_INSTDONE);
+	} else if (GRAPHICS_VER(i915) >= 4) {
+		instdone->instdone =
+			intel_uncore_read(uncore, RING_INSTDONE(mmio_base));
+		if (engine->id == RCS0)
+			/* HACK: Using the wrong struct member */
+			instdone->slice_common =
+				intel_uncore_read(uncore, GEN4_INSTDONE1);
+	} else {
+		instdone->instdone = intel_uncore_read(uncore, GEN2_INSTDONE);
+	}
+}
+
+static bool ring_is_idle(struct intel_engine_cs *engine)
+{
+	bool idle = true;
+
+	if (I915_SELFTEST_ONLY(!engine->mmio_base))
+		return true;
+
+	if (!intel_engine_pm_get_if_awake(engine))
+		return true;
+
+	/* First check that no commands are left in the ring */
+	if ((ENGINE_READ(engine, RING_HEAD) & HEAD_ADDR) !=
+	    (ENGINE_READ(engine, RING_TAIL) & TAIL_ADDR))
+		idle = false;
+
+	/* No bit for gen2, so assume the CS parser is idle */
+	if (GRAPHICS_VER(engine->i915) > 2 &&
+	    !(ENGINE_READ(engine, RING_MI_MODE) & MODE_IDLE))
+		idle = false;
+
+	intel_engine_pm_put(engine);
+
+	return idle;
+}
+
+void __intel_engine_flush_submission(struct intel_engine_cs *engine, bool sync)
+{
+	struct tasklet_struct *t = &engine->sched_engine->tasklet;
+
+	if (!t->callback)
+		return;
+
+	local_bh_disable();
+	if (tasklet_trylock(t)) {
+		/* Must wait for any GPU reset in progress. */
+		if (__tasklet_is_enabled(t))
+			t->callback(t);
+		tasklet_unlock(t);
+	}
+	local_bh_enable();
+
+	/* Synchronise and wait for the tasklet on another CPU */
+	if (sync)
+		tasklet_unlock_wait(t);
+}
+
+/**
+ * intel_engine_is_idle() - Report if the engine has finished process all work
+ * @engine: the intel_engine_cs
+ *
+ * Return true if there are no requests pending, nothing left to be submitted
+ * to hardware, and that the engine is idle.
+ */
+bool intel_engine_is_idle(struct intel_engine_cs *engine)
+{
+	/* More white lies, if wedged, hw state is inconsistent */
+	if (intel_gt_is_wedged(engine->gt))
+		return true;
+
+	if (!intel_engine_pm_is_awake(engine))
+		return true;
+
+	/* Waiting to drain ELSP? */
+	intel_synchronize_hardirq(engine->i915);
+	intel_engine_flush_submission(engine);
+
+	/* ELSP is empty, but there are ready requests? E.g. after reset */
+	if (!i915_sched_engine_is_empty(engine->sched_engine))
+		return false;
+
+	/* Ring stopped? */
+	return ring_is_idle(engine);
+}
+
+bool intel_engines_are_idle(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	/*
+	 * If the driver is wedged, HW state may be very inconsistent and
+	 * report that it is still busy, even though we have stopped using it.
+	 */
+	if (intel_gt_is_wedged(gt))
+		return true;
+
+	/* Already parked (and passed an idleness test); must still be idle */
+	if (!READ_ONCE(gt->awake))
+		return true;
+
+	for_each_engine(engine, gt, id) {
+		if (!intel_engine_is_idle(engine))
+			return false;
+	}
+
+	return true;
+}
+
+bool intel_engine_irq_enable(struct intel_engine_cs *engine)
+{
+	if (!engine->irq_enable)
+		return false;
+
+	/* Caller disables interrupts */
+	spin_lock(engine->gt->irq_lock);
+	engine->irq_enable(engine);
+	spin_unlock(engine->gt->irq_lock);
+
+	return true;
+}
+
+void intel_engine_irq_disable(struct intel_engine_cs *engine)
+{
+	if (!engine->irq_disable)
+		return;
+
+	/* Caller disables interrupts */
+	spin_lock(engine->gt->irq_lock);
+	engine->irq_disable(engine);
+	spin_unlock(engine->gt->irq_lock);
+}
+
+void intel_engines_reset_default_submission(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	for_each_engine(engine, gt, id) {
+		if (engine->sanitize)
+			engine->sanitize(engine);
+
+		engine->set_default_submission(engine);
+	}
+}
+
+bool intel_engine_can_store_dword(struct intel_engine_cs *engine)
+{
+	switch (GRAPHICS_VER(engine->i915)) {
+	case 2:
+		return false; /* uses physical not virtual addresses */
+	case 3:
+		/* maybe only uses physical not virtual addresses */
+		return !(IS_I915G(engine->i915) || IS_I915GM(engine->i915));
+	case 4:
+		return !IS_I965G(engine->i915); /* who knows! */
+	case 6:
+		return engine->class != VIDEO_DECODE_CLASS; /* b0rked */
+	default:
+		return true;
+	}
+}
+
+static struct intel_timeline *get_timeline(struct i915_request *rq)
+{
+	struct intel_timeline *tl;
+
+	/*
+	 * Even though we are holding the engine->sched_engine->lock here, there
+	 * is no control over the submission queue per-se and we are
+	 * inspecting the active state at a random point in time, with an
+	 * unknown queue. Play safe and make sure the timeline remains valid.
+	 * (Only being used for pretty printing, one extra kref shouldn't
+	 * cause a camel stampede!)
+	 */
+	rcu_read_lock();
+	tl = rcu_dereference(rq->timeline);
+	if (!kref_get_unless_zero(&tl->kref))
+		tl = NULL;
+	rcu_read_unlock();
+
+	return tl;
+}
+
+static int print_ring(char *buf, int sz, struct i915_request *rq)
+{
+	int len = 0;
+
+	if (!i915_request_signaled(rq)) {
+		struct intel_timeline *tl = get_timeline(rq);
+
+		len = scnprintf(buf, sz,
+				"ring:{start:%08x, hwsp:%08x, seqno:%08x, runtime:%llums}, ",
+				i915_ggtt_offset(rq->ring->vma),
+				tl ? tl->hwsp_offset : 0,
+				hwsp_seqno(rq),
+				DIV_ROUND_CLOSEST_ULL(intel_context_get_total_runtime_ns(rq->context),
+						      1000 * 1000));
+
+		if (tl)
+			intel_timeline_put(tl);
+	}
+
+	return len;
+}
+
+static void hexdump(struct drm_printer *m, const void *buf, size_t len)
+{
+	const size_t rowsize = 8 * sizeof(u32);
+	const void *prev = NULL;
+	bool skip = false;
+	size_t pos;
+
+	for (pos = 0; pos < len; pos += rowsize) {
+		char line[128];
+
+		if (prev && !memcmp(prev, buf + pos, rowsize)) {
+			if (!skip) {
+				drm_printf(m, "*\n");
+				skip = true;
+			}
+			continue;
+		}
+
+		WARN_ON_ONCE(hex_dump_to_buffer(buf + pos, len - pos,
+						rowsize, sizeof(u32),
+						line, sizeof(line),
+						false) >= sizeof(line));
+		drm_printf(m, "[%04zx] %s\n", pos, line);
+
+		prev = buf + pos;
+		skip = false;
+	}
+}
+
+static const char *repr_timer(const struct timer_list *t)
+{
+	if (!READ_ONCE(t->expires))
+		return "inactive";
+
+	if (timer_pending(t))
+		return "active";
+
+	return "expired";
+}
+
+static void intel_engine_print_registers(struct intel_engine_cs *engine,
+					 struct drm_printer *m)
+{
+	struct drm_i915_private *dev_priv = engine->i915;
+	struct intel_engine_execlists * const execlists = &engine->execlists;
+	u64 addr;
+
+	if (engine->id == RENDER_CLASS && IS_GRAPHICS_VER(dev_priv, 4, 7))
+		drm_printf(m, "\tCCID: 0x%08x\n", ENGINE_READ(engine, CCID));
+	if (HAS_EXECLISTS(dev_priv)) {
+		drm_printf(m, "\tEL_STAT_HI: 0x%08x\n",
+			   ENGINE_READ(engine, RING_EXECLIST_STATUS_HI));
+		drm_printf(m, "\tEL_STAT_LO: 0x%08x\n",
+			   ENGINE_READ(engine, RING_EXECLIST_STATUS_LO));
+	}
+	drm_printf(m, "\tRING_START: 0x%08x\n",
+		   ENGINE_READ(engine, RING_START));
+	drm_printf(m, "\tRING_HEAD:  0x%08x\n",
+		   ENGINE_READ(engine, RING_HEAD) & HEAD_ADDR);
+	drm_printf(m, "\tRING_TAIL:  0x%08x\n",
+		   ENGINE_READ(engine, RING_TAIL) & TAIL_ADDR);
+	drm_printf(m, "\tRING_CTL:   0x%08x%s\n",
+		   ENGINE_READ(engine, RING_CTL),
+		   ENGINE_READ(engine, RING_CTL) & (RING_WAIT | RING_WAIT_SEMAPHORE) ? " [waiting]" : "");
+	if (GRAPHICS_VER(engine->i915) > 2) {
+		drm_printf(m, "\tRING_MODE:  0x%08x%s\n",
+			   ENGINE_READ(engine, RING_MI_MODE),
+			   ENGINE_READ(engine, RING_MI_MODE) & (MODE_IDLE) ? " [idle]" : "");
+	}
+
+	if (GRAPHICS_VER(dev_priv) >= 6) {
+		drm_printf(m, "\tRING_IMR:   0x%08x\n",
+			   ENGINE_READ(engine, RING_IMR));
+		drm_printf(m, "\tRING_ESR:   0x%08x\n",
+			   ENGINE_READ(engine, RING_ESR));
+		drm_printf(m, "\tRING_EMR:   0x%08x\n",
+			   ENGINE_READ(engine, RING_EMR));
+		drm_printf(m, "\tRING_EIR:   0x%08x\n",
+			   ENGINE_READ(engine, RING_EIR));
+	}
+
+	addr = intel_engine_get_active_head(engine);
+	drm_printf(m, "\tACTHD:  0x%08x_%08x\n",
+		   upper_32_bits(addr), lower_32_bits(addr));
+	addr = intel_engine_get_last_batch_head(engine);
+	drm_printf(m, "\tBBADDR: 0x%08x_%08x\n",
+		   upper_32_bits(addr), lower_32_bits(addr));
+	if (GRAPHICS_VER(dev_priv) >= 8)
+		addr = ENGINE_READ64(engine, RING_DMA_FADD, RING_DMA_FADD_UDW);
+	else if (GRAPHICS_VER(dev_priv) >= 4)
+		addr = ENGINE_READ(engine, RING_DMA_FADD);
+	else
+		addr = ENGINE_READ(engine, DMA_FADD_I8XX);
+	drm_printf(m, "\tDMA_FADDR: 0x%08x_%08x\n",
+		   upper_32_bits(addr), lower_32_bits(addr));
+	if (GRAPHICS_VER(dev_priv) >= 4) {
+		drm_printf(m, "\tIPEIR: 0x%08x\n",
+			   ENGINE_READ(engine, RING_IPEIR));
+		drm_printf(m, "\tIPEHR: 0x%08x\n",
+			   ENGINE_READ(engine, RING_IPEHR));
+	} else {
+		drm_printf(m, "\tIPEIR: 0x%08x\n", ENGINE_READ(engine, IPEIR));
+		drm_printf(m, "\tIPEHR: 0x%08x\n", ENGINE_READ(engine, IPEHR));
+	}
+
+	if (HAS_EXECLISTS(dev_priv) && !intel_engine_uses_guc(engine)) {
+		struct i915_request * const *port, *rq;
+		const u32 *hws =
+			&engine->status_page.addr[I915_HWS_CSB_BUF0_INDEX];
+		const u8 num_entries = execlists->csb_size;
+		unsigned int idx;
+		u8 read, write;
+
+		drm_printf(m, "\tExeclist tasklet queued? %s (%s), preempt? %s, timeslice? %s\n",
+			   str_yes_no(test_bit(TASKLET_STATE_SCHED, &engine->sched_engine->tasklet.state)),
+			   str_enabled_disabled(!atomic_read(&engine->sched_engine->tasklet.count)),
+			   repr_timer(&engine->execlists.preempt),
+			   repr_timer(&engine->execlists.timer));
+
+		read = execlists->csb_head;
+		write = READ_ONCE(*execlists->csb_write);
+
+		drm_printf(m, "\tExeclist status: 0x%08x %08x; CSB read:%d, write:%d, entries:%d\n",
+			   ENGINE_READ(engine, RING_EXECLIST_STATUS_LO),
+			   ENGINE_READ(engine, RING_EXECLIST_STATUS_HI),
+			   read, write, num_entries);
+
+		if (read >= num_entries)
+			read = 0;
+		if (write >= num_entries)
+			write = 0;
+		if (read > write)
+			write += num_entries;
+		while (read < write) {
+			idx = ++read % num_entries;
+			drm_printf(m, "\tExeclist CSB[%d]: 0x%08x, context: %d\n",
+				   idx, hws[idx * 2], hws[idx * 2 + 1]);
+		}
+
+		i915_sched_engine_active_lock_bh(engine->sched_engine);
+		rcu_read_lock();
+		for (port = execlists->active; (rq = *port); port++) {
+			char hdr[160];
+			int len;
+
+			len = scnprintf(hdr, sizeof(hdr),
+					"\t\tActive[%d]:  ccid:%08x%s%s, ",
+					(int)(port - execlists->active),
+					rq->context->lrc.ccid,
+					intel_context_is_closed(rq->context) ? "!" : "",
+					intel_context_is_banned(rq->context) ? "*" : "");
+			len += print_ring(hdr + len, sizeof(hdr) - len, rq);
+			scnprintf(hdr + len, sizeof(hdr) - len, "rq: ");
+			i915_request_show(m, rq, hdr, 0);
+		}
+		for (port = execlists->pending; (rq = *port); port++) {
+			char hdr[160];
+			int len;
+
+			len = scnprintf(hdr, sizeof(hdr),
+					"\t\tPending[%d]: ccid:%08x%s%s, ",
+					(int)(port - execlists->pending),
+					rq->context->lrc.ccid,
+					intel_context_is_closed(rq->context) ? "!" : "",
+					intel_context_is_banned(rq->context) ? "*" : "");
+			len += print_ring(hdr + len, sizeof(hdr) - len, rq);
+			scnprintf(hdr + len, sizeof(hdr) - len, "rq: ");
+			i915_request_show(m, rq, hdr, 0);
+		}
+		rcu_read_unlock();
+		i915_sched_engine_active_unlock_bh(engine->sched_engine);
+	} else if (GRAPHICS_VER(dev_priv) > 6) {
+		drm_printf(m, "\tPP_DIR_BASE: 0x%08x\n",
+			   ENGINE_READ(engine, RING_PP_DIR_BASE));
+		drm_printf(m, "\tPP_DIR_BASE_READ: 0x%08x\n",
+			   ENGINE_READ(engine, RING_PP_DIR_BASE_READ));
+		drm_printf(m, "\tPP_DIR_DCLV: 0x%08x\n",
+			   ENGINE_READ(engine, RING_PP_DIR_DCLV));
+	}
+}
+
+static void print_request_ring(struct drm_printer *m, struct i915_request *rq)
+{
+	struct i915_vma_resource *vma_res = rq->batch_res;
+	void *ring;
+	int size;
+
+	drm_printf(m,
+		   "[head %04x, postfix %04x, tail %04x, batch 0x%08x_%08x]:\n",
+		   rq->head, rq->postfix, rq->tail,
+		   vma_res ? upper_32_bits(vma_res->start) : ~0u,
+		   vma_res ? lower_32_bits(vma_res->start) : ~0u);
+
+	size = rq->tail - rq->head;
+	if (rq->tail < rq->head)
+		size += rq->ring->size;
+
+	ring = kmalloc(size, GFP_ATOMIC);
+	if (ring) {
+		const void *vaddr = rq->ring->vaddr;
+		unsigned int head = rq->head;
+		unsigned int len = 0;
+
+		if (rq->tail < head) {
+			len = rq->ring->size - head;
+			memcpy(ring, vaddr + head, len);
+			head = 0;
+		}
+		memcpy(ring + len, vaddr + head, size - len);
+
+		hexdump(m, ring, size);
+		kfree(ring);
+	}
+}
+
+static unsigned long read_ul(void *p, size_t x)
+{
+	return *(unsigned long *)(p + x);
+}
+
+static void print_properties(struct intel_engine_cs *engine,
+			     struct drm_printer *m)
+{
+	static const struct pmap {
+		size_t offset;
+		const char *name;
+	} props[] = {
+#define P(x) { \
+	.offset = offsetof(typeof(engine->props), x), \
+	.name = #x \
+}
+		P(heartbeat_interval_ms),
+		P(max_busywait_duration_ns),
+		P(preempt_timeout_ms),
+		P(stop_timeout_ms),
+		P(timeslice_duration_ms),
+
+		{},
+#undef P
+	};
+	const struct pmap *p;
+
+	drm_printf(m, "\tProperties:\n");
+	for (p = props; p->name; p++)
+		drm_printf(m, "\t\t%s: %lu [default %lu]\n",
+			   p->name,
+			   read_ul(&engine->props, p->offset),
+			   read_ul(&engine->defaults, p->offset));
+}
+
+static void engine_dump_request(struct i915_request *rq, struct drm_printer *m, const char *msg)
+{
+	struct intel_timeline *tl = get_timeline(rq);
+
+	i915_request_show(m, rq, msg, 0);
+
+	drm_printf(m, "\t\tring->start:  0x%08x\n",
+		   i915_ggtt_offset(rq->ring->vma));
+	drm_printf(m, "\t\tring->head:   0x%08x\n",
+		   rq->ring->head);
+	drm_printf(m, "\t\tring->tail:   0x%08x\n",
+		   rq->ring->tail);
+	drm_printf(m, "\t\tring->emit:   0x%08x\n",
+		   rq->ring->emit);
+	drm_printf(m, "\t\tring->space:  0x%08x\n",
+		   rq->ring->space);
+
+	if (tl) {
+		drm_printf(m, "\t\tring->hwsp:   0x%08x\n",
+			   tl->hwsp_offset);
+		intel_timeline_put(tl);
+	}
+
+	print_request_ring(m, rq);
+
+	if (rq->context->lrc_reg_state) {
+		drm_printf(m, "Logical Ring Context:\n");
+		hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE);
+	}
+}
+
+void intel_engine_dump_active_requests(struct list_head *requests,
+				       struct i915_request *hung_rq,
+				       struct drm_printer *m)
+{
+	struct i915_request *rq;
+	const char *msg;
+	enum i915_request_state state;
+
+	list_for_each_entry(rq, requests, sched.link) {
+		if (rq == hung_rq)
+			continue;
+
+		state = i915_test_request_state(rq);
+		if (state < I915_REQUEST_QUEUED)
+			continue;
+
+		if (state == I915_REQUEST_ACTIVE)
+			msg = "\t\tactive on engine";
+		else
+			msg = "\t\tactive in queue";
+
+		engine_dump_request(rq, m, msg);
+	}
+}
+
+static void engine_dump_active_requests(struct intel_engine_cs *engine,
+					struct drm_printer *m)
+{
+	struct intel_context *hung_ce = NULL;
+	struct i915_request *hung_rq = NULL;
+
+	/*
+	 * No need for an engine->irq_seqno_barrier() before the seqno reads.
+	 * The GPU is still running so requests are still executing and any
+	 * hardware reads will be out of date by the time they are reported.
+	 * But the intention here is just to report an instantaneous snapshot
+	 * so that's fine.
+	 */
+	intel_engine_get_hung_entity(engine, &hung_ce, &hung_rq);
+
+	drm_printf(m, "\tRequests:\n");
+
+	if (hung_rq)
+		engine_dump_request(hung_rq, m, "\t\thung");
+	else if (hung_ce)
+		drm_printf(m, "\t\tGot hung ce but no hung rq!\n");
+
+	if (intel_uc_uses_guc_submission(&engine->gt->uc))
+		intel_guc_dump_active_requests(engine, hung_rq, m);
+	else
+		intel_execlists_dump_active_requests(engine, hung_rq, m);
+
+	if (hung_rq)
+		i915_request_put(hung_rq);
+}
+
+void intel_engine_dump(struct intel_engine_cs *engine,
+		       struct drm_printer *m,
+		       const char *header, ...)
+{
+	struct i915_gpu_error * const error = &engine->i915->gpu_error;
+	struct i915_request *rq;
+	intel_wakeref_t wakeref;
+	ktime_t dummy;
+
+	if (header) {
+		va_list ap;
+
+		va_start(ap, header);
+		drm_vprintf(m, header, &ap);
+		va_end(ap);
+	}
+
+	if (intel_gt_is_wedged(engine->gt))
+		drm_printf(m, "*** WEDGED ***\n");
+
+	drm_printf(m, "\tAwake? %d\n", atomic_read(&engine->wakeref.count));
+	drm_printf(m, "\tBarriers?: %s\n",
+		   str_yes_no(!llist_empty(&engine->barrier_tasks)));
+	drm_printf(m, "\tLatency: %luus\n",
+		   ewma__engine_latency_read(&engine->latency));
+	if (intel_engine_supports_stats(engine))
+		drm_printf(m, "\tRuntime: %llums\n",
+			   ktime_to_ms(intel_engine_get_busy_time(engine,
+								  &dummy)));
+	drm_printf(m, "\tForcewake: %x domains, %d active\n",
+		   engine->fw_domain, READ_ONCE(engine->fw_active));
+
+	rcu_read_lock();
+	rq = READ_ONCE(engine->heartbeat.systole);
+	if (rq)
+		drm_printf(m, "\tHeartbeat: %d ms ago\n",
+			   jiffies_to_msecs(jiffies - rq->emitted_jiffies));
+	rcu_read_unlock();
+	drm_printf(m, "\tReset count: %d (global %d)\n",
+		   i915_reset_engine_count(error, engine),
+		   i915_reset_count(error));
+	print_properties(engine, m);
+
+	engine_dump_active_requests(engine, m);
+
+	drm_printf(m, "\tMMIO base:  0x%08x\n", engine->mmio_base);
+	wakeref = intel_runtime_pm_get_if_in_use(engine->uncore->rpm);
+	if (wakeref) {
+		intel_engine_print_registers(engine, m);
+		intel_runtime_pm_put(engine->uncore->rpm, wakeref);
+	} else {
+		drm_printf(m, "\tDevice is asleep; skipping register dump\n");
+	}
+
+	intel_execlists_show_requests(engine, m, i915_request_show, 8);
+
+	drm_printf(m, "HWSP:\n");
+	hexdump(m, engine->status_page.addr, PAGE_SIZE);
+
+	drm_printf(m, "Idle? %s\n", str_yes_no(intel_engine_is_idle(engine)));
+
+	intel_engine_print_breadcrumbs(engine, m);
+}
+
+/**
+ * intel_engine_get_busy_time() - Return current accumulated engine busyness
+ * @engine: engine to report on
+ * @now: monotonic timestamp of sampling
+ *
+ * Returns accumulated time @engine was busy since engine stats were enabled.
+ */
+ktime_t intel_engine_get_busy_time(struct intel_engine_cs *engine, ktime_t *now)
+{
+	return engine->busyness(engine, now);
+}
+
+struct intel_context *
+intel_engine_create_virtual(struct intel_engine_cs **siblings,
+			    unsigned int count, unsigned long flags)
+{
+	if (count == 0)
+		return ERR_PTR(-EINVAL);
+
+	if (count == 1 && !(flags & FORCE_VIRTUAL))
+		return intel_context_create(siblings[0]);
+
+	GEM_BUG_ON(!siblings[0]->cops->create_virtual);
+	return siblings[0]->cops->create_virtual(siblings, count, flags);
+}
+
+static struct i915_request *engine_execlist_find_hung_request(struct intel_engine_cs *engine)
+{
+	struct i915_request *request, *active = NULL;
+
+	/*
+	 * This search does not work in GuC submission mode. However, the GuC
+	 * will report the hanging context directly to the driver itself. So
+	 * the driver should never get here when in GuC mode.
+	 */
+	GEM_BUG_ON(intel_uc_uses_guc_submission(&engine->gt->uc));
+
+	/*
+	 * We are called by the error capture, reset and to dump engine
+	 * state at random points in time. In particular, note that neither is
+	 * crucially ordered with an interrupt. After a hang, the GPU is dead
+	 * and we assume that no more writes can happen (we waited long enough
+	 * for all writes that were in transaction to be flushed) - adding an
+	 * extra delay for a recent interrupt is pointless. Hence, we do
+	 * not need an engine->irq_seqno_barrier() before the seqno reads.
+	 * At all other times, we must assume the GPU is still running, but
+	 * we only care about the snapshot of this moment.
+	 */
+	lockdep_assert_held(&engine->sched_engine->lock);
+
+	rcu_read_lock();
+	request = execlists_active(&engine->execlists);
+	if (request) {
+		struct intel_timeline *tl = request->context->timeline;
+
+		list_for_each_entry_from_reverse(request, &tl->requests, link) {
+			if (__i915_request_is_complete(request))
+				break;
+
+			active = request;
+		}
+	}
+	rcu_read_unlock();
+	if (active)
+		return active;
+
+	list_for_each_entry(request, &engine->sched_engine->requests,
+			    sched.link) {
+		if (i915_test_request_state(request) != I915_REQUEST_ACTIVE)
+			continue;
+
+		active = request;
+		break;
+	}
+
+	return active;
+}
+
+void intel_engine_get_hung_entity(struct intel_engine_cs *engine,
+				  struct intel_context **ce, struct i915_request **rq)
+{
+	unsigned long flags;
+
+	*ce = intel_engine_get_hung_context(engine);
+	if (*ce) {
+		intel_engine_clear_hung_context(engine);
+
+		*rq = intel_context_get_active_request(*ce);
+		return;
+	}
+
+	/*
+	 * Getting here with GuC enabled means it is a forced error capture
+	 * with no actual hang. So, no need to attempt the execlist search.
+	 */
+	if (intel_uc_uses_guc_submission(&engine->gt->uc))
+		return;
+
+	spin_lock_irqsave(&engine->sched_engine->lock, flags);
+	*rq = engine_execlist_find_hung_request(engine);
+	if (*rq)
+		*rq = i915_request_get_rcu(*rq);
+	spin_unlock_irqrestore(&engine->sched_engine->lock, flags);
+}
+
+void xehp_enable_ccs_engines(struct intel_engine_cs *engine)
+{
+	/*
+	 * If there are any non-fused-off CCS engines, we need to enable CCS
+	 * support in the RCU_MODE register.  This only needs to be done once,
+	 * so for simplicity we'll take care of this in the RCS engine's
+	 * resume handler; since the RCS and all CCS engines belong to the
+	 * same reset domain and are reset together, this will also take care
+	 * of re-applying the setting after i915-triggered resets.
+	 */
+	if (!CCS_MASK(engine->gt))
+		return;
+
+	intel_uncore_write(engine->uncore, GEN12_RCU_MODE,
+			   _MASKED_BIT_ENABLE(GEN12_RCU_MODE_CCS_ENABLE));
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
+#include "mock_engine.c"
+#include "selftest_engine.c"
+#include "selftest_engine_cs.c"
+#endif