Contributors: 16
Author Tokens Token Proportion Commits Commit Proportion
Matthew Brost 2737 56.55% 2 4.00%
Rodrigo Vivi 467 9.65% 2 4.00%
Michal Wajdeczko 339 7.00% 3 6.00%
Matt Roper 322 6.65% 6 12.00%
José Roberto de Souza 294 6.07% 7 14.00%
Daniele Ceraolo Spurio 212 4.38% 7 14.00%
Niranjana Vishwanathapura 110 2.27% 3 6.00%
Tejas Upadhyay 103 2.13% 2 4.00%
Lucas De Marchi 97 2.00% 11 22.00%
Nirmoy Das 84 1.74% 1 2.00%
Balasubramani Vivekanandan 36 0.74% 1 2.00%
Francois Dugast 31 0.64% 1 2.00%
Matt Atwood 5 0.10% 1 2.00%
Matthew Auld 1 0.02% 1 2.00%
Himal Prasad Ghimiray 1 0.02% 1 2.00%
Michał Winiarski 1 0.02% 1 2.00%
Total 4840 50 


// SPDX-License-Identifier: MIT
/*
 * Copyright © 2021 Intel Corporation
 */

#include "xe_hw_engine.h"

#include <drm/drm_managed.h>

#include "regs/xe_engine_regs.h"
#include "regs/xe_gt_regs.h"
#include "xe_assert.h"
#include "xe_bo.h"
#include "xe_device.h"
#include "xe_execlist.h"
#include "xe_force_wake.h"
#include "xe_gsc.h"
#include "xe_gt.h"
#include "xe_gt_ccs_mode.h"
#include "xe_gt_printk.h"
#include "xe_gt_topology.h"
#include "xe_hw_fence.h"
#include "xe_irq.h"
#include "xe_lrc.h"
#include "xe_macros.h"
#include "xe_mmio.h"
#include "xe_reg_sr.h"
#include "xe_rtp.h"
#include "xe_sched_job.h"
#include "xe_sriov.h"
#include "xe_tuning.h"
#include "xe_uc_fw.h"
#include "xe_wa.h"

#define MAX_MMIO_BASES 3
struct engine_info {
	const char *name;
	unsigned int class : 8;
	unsigned int instance : 8;
	unsigned int irq_offset : 8;
	enum xe_force_wake_domains domain;
	u32 mmio_base;
};

static const struct engine_info engine_infos[] = {
	[XE_HW_ENGINE_RCS0] = {
		.name = "rcs0",
		.class = XE_ENGINE_CLASS_RENDER,
		.instance = 0,
		.irq_offset = ilog2(INTR_RCS0),
		.domain = XE_FW_RENDER,
		.mmio_base = RENDER_RING_BASE,
	},
	[XE_HW_ENGINE_BCS0] = {
		.name = "bcs0",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 0,
		.irq_offset = ilog2(INTR_BCS(0)),
		.domain = XE_FW_RENDER,
		.mmio_base = BLT_RING_BASE,
	},
	[XE_HW_ENGINE_BCS1] = {
		.name = "bcs1",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 1,
		.irq_offset = ilog2(INTR_BCS(1)),
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS1_RING_BASE,
	},
	[XE_HW_ENGINE_BCS2] = {
		.name = "bcs2",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 2,
		.irq_offset = ilog2(INTR_BCS(2)),
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS2_RING_BASE,
	},
	[XE_HW_ENGINE_BCS3] = {
		.name = "bcs3",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 3,
		.irq_offset = ilog2(INTR_BCS(3)),
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS3_RING_BASE,
	},
	[XE_HW_ENGINE_BCS4] = {
		.name = "bcs4",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 4,
		.irq_offset = ilog2(INTR_BCS(4)),
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS4_RING_BASE,
	},
	[XE_HW_ENGINE_BCS5] = {
		.name = "bcs5",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 5,
		.irq_offset = ilog2(INTR_BCS(5)),
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS5_RING_BASE,
	},
	[XE_HW_ENGINE_BCS6] = {
		.name = "bcs6",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 6,
		.irq_offset = ilog2(INTR_BCS(6)),
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS6_RING_BASE,
	},
	[XE_HW_ENGINE_BCS7] = {
		.name = "bcs7",
		.class = XE_ENGINE_CLASS_COPY,
		.irq_offset = ilog2(INTR_BCS(7)),
		.instance = 7,
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS7_RING_BASE,
	},
	[XE_HW_ENGINE_BCS8] = {
		.name = "bcs8",
		.class = XE_ENGINE_CLASS_COPY,
		.instance = 8,
		.irq_offset = ilog2(INTR_BCS8),
		.domain = XE_FW_RENDER,
		.mmio_base = XEHPC_BCS8_RING_BASE,
	},

	[XE_HW_ENGINE_VCS0] = {
		.name = "vcs0",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 0,
		.irq_offset = 32 + ilog2(INTR_VCS(0)),
		.domain = XE_FW_MEDIA_VDBOX0,
		.mmio_base = BSD_RING_BASE,
	},
	[XE_HW_ENGINE_VCS1] = {
		.name = "vcs1",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 1,
		.irq_offset = 32 + ilog2(INTR_VCS(1)),
		.domain = XE_FW_MEDIA_VDBOX1,
		.mmio_base = BSD2_RING_BASE,
	},
	[XE_HW_ENGINE_VCS2] = {
		.name = "vcs2",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 2,
		.irq_offset = 32 + ilog2(INTR_VCS(2)),
		.domain = XE_FW_MEDIA_VDBOX2,
		.mmio_base = BSD3_RING_BASE,
	},
	[XE_HW_ENGINE_VCS3] = {
		.name = "vcs3",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 3,
		.irq_offset = 32 + ilog2(INTR_VCS(3)),
		.domain = XE_FW_MEDIA_VDBOX3,
		.mmio_base = BSD4_RING_BASE,
	},
	[XE_HW_ENGINE_VCS4] = {
		.name = "vcs4",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 4,
		.irq_offset = 32 + ilog2(INTR_VCS(4)),
		.domain = XE_FW_MEDIA_VDBOX4,
		.mmio_base = XEHP_BSD5_RING_BASE,
	},
	[XE_HW_ENGINE_VCS5] = {
		.name = "vcs5",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 5,
		.irq_offset = 32 + ilog2(INTR_VCS(5)),
		.domain = XE_FW_MEDIA_VDBOX5,
		.mmio_base = XEHP_BSD6_RING_BASE,
	},
	[XE_HW_ENGINE_VCS6] = {
		.name = "vcs6",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 6,
		.irq_offset = 32 + ilog2(INTR_VCS(6)),
		.domain = XE_FW_MEDIA_VDBOX6,
		.mmio_base = XEHP_BSD7_RING_BASE,
	},
	[XE_HW_ENGINE_VCS7] = {
		.name = "vcs7",
		.class = XE_ENGINE_CLASS_VIDEO_DECODE,
		.instance = 7,
		.irq_offset = 32 + ilog2(INTR_VCS(7)),
		.domain = XE_FW_MEDIA_VDBOX7,
		.mmio_base = XEHP_BSD8_RING_BASE,
	},
	[XE_HW_ENGINE_VECS0] = {
		.name = "vecs0",
		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
		.instance = 0,
		.irq_offset = 32 + ilog2(INTR_VECS(0)),
		.domain = XE_FW_MEDIA_VEBOX0,
		.mmio_base = VEBOX_RING_BASE,
	},
	[XE_HW_ENGINE_VECS1] = {
		.name = "vecs1",
		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
		.instance = 1,
		.irq_offset = 32 + ilog2(INTR_VECS(1)),
		.domain = XE_FW_MEDIA_VEBOX1,
		.mmio_base = VEBOX2_RING_BASE,
	},
	[XE_HW_ENGINE_VECS2] = {
		.name = "vecs2",
		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
		.instance = 2,
		.irq_offset = 32 + ilog2(INTR_VECS(2)),
		.domain = XE_FW_MEDIA_VEBOX2,
		.mmio_base = XEHP_VEBOX3_RING_BASE,
	},
	[XE_HW_ENGINE_VECS3] = {
		.name = "vecs3",
		.class = XE_ENGINE_CLASS_VIDEO_ENHANCE,
		.instance = 3,
		.irq_offset = 32 + ilog2(INTR_VECS(3)),
		.domain = XE_FW_MEDIA_VEBOX3,
		.mmio_base = XEHP_VEBOX4_RING_BASE,
	},
	[XE_HW_ENGINE_CCS0] = {
		.name = "ccs0",
		.class = XE_ENGINE_CLASS_COMPUTE,
		.instance = 0,
		.irq_offset = ilog2(INTR_CCS(0)),
		.domain = XE_FW_RENDER,
		.mmio_base = COMPUTE0_RING_BASE,
	},
	[XE_HW_ENGINE_CCS1] = {
		.name = "ccs1",
		.class = XE_ENGINE_CLASS_COMPUTE,
		.instance = 1,
		.irq_offset = ilog2(INTR_CCS(1)),
		.domain = XE_FW_RENDER,
		.mmio_base = COMPUTE1_RING_BASE,
	},
	[XE_HW_ENGINE_CCS2] = {
		.name = "ccs2",
		.class = XE_ENGINE_CLASS_COMPUTE,
		.instance = 2,
		.irq_offset = ilog2(INTR_CCS(2)),
		.domain = XE_FW_RENDER,
		.mmio_base = COMPUTE2_RING_BASE,
	},
	[XE_HW_ENGINE_CCS3] = {
		.name = "ccs3",
		.class = XE_ENGINE_CLASS_COMPUTE,
		.instance = 3,
		.irq_offset = ilog2(INTR_CCS(3)),
		.domain = XE_FW_RENDER,
		.mmio_base = COMPUTE3_RING_BASE,
	},
	[XE_HW_ENGINE_GSCCS0] = {
		.name = "gsccs0",
		.class = XE_ENGINE_CLASS_OTHER,
		.instance = OTHER_GSC_INSTANCE,
		.domain = XE_FW_GSC,
		.mmio_base = GSCCS_RING_BASE,
	},
};

static void hw_engine_fini(struct drm_device *drm, void *arg)
{
	struct xe_hw_engine *hwe = arg;

	if (hwe->exl_port)
		xe_execlist_port_destroy(hwe->exl_port);
	xe_lrc_finish(&hwe->kernel_lrc);

	hwe->gt = NULL;
}

static void hw_engine_mmio_write32(struct xe_hw_engine *hwe, struct xe_reg reg,
				   u32 val)
{
	xe_gt_assert(hwe->gt, !(reg.addr & hwe->mmio_base));
	xe_force_wake_assert_held(gt_to_fw(hwe->gt), hwe->domain);

	reg.addr += hwe->mmio_base;

	xe_mmio_write32(hwe->gt, reg, val);
}

static u32 hw_engine_mmio_read32(struct xe_hw_engine *hwe, struct xe_reg reg)
{
	xe_gt_assert(hwe->gt, !(reg.addr & hwe->mmio_base));
	xe_force_wake_assert_held(gt_to_fw(hwe->gt), hwe->domain);

	reg.addr += hwe->mmio_base;

	return xe_mmio_read32(hwe->gt, reg);
}

void xe_hw_engine_enable_ring(struct xe_hw_engine *hwe)
{
	u32 ccs_mask =
		xe_hw_engine_mask_per_class(hwe->gt, XE_ENGINE_CLASS_COMPUTE);

	if (hwe->class == XE_ENGINE_CLASS_COMPUTE && ccs_mask)
		xe_mmio_write32(hwe->gt, RCU_MODE,
				_MASKED_BIT_ENABLE(RCU_MODE_CCS_ENABLE));

	hw_engine_mmio_write32(hwe, RING_HWSTAM(0), ~0x0);
	hw_engine_mmio_write32(hwe, RING_HWS_PGA(0),
			       xe_bo_ggtt_addr(hwe->hwsp));
	hw_engine_mmio_write32(hwe, RING_MODE(0),
			       _MASKED_BIT_ENABLE(GFX_DISABLE_LEGACY_MODE));
	hw_engine_mmio_write32(hwe, RING_MI_MODE(0),
			       _MASKED_BIT_DISABLE(STOP_RING));
	hw_engine_mmio_read32(hwe, RING_MI_MODE(0));
}

static bool xe_hw_engine_match_fixed_cslice_mode(const struct xe_gt *gt,
						 const struct xe_hw_engine *hwe)
{
	return xe_gt_ccs_mode_enabled(gt) &&
	       xe_rtp_match_first_render_or_compute(gt, hwe);
}

static bool xe_rtp_cfeg_wmtp_disabled(const struct xe_gt *gt,
				      const struct xe_hw_engine *hwe)
{
	if (GRAPHICS_VER(gt_to_xe(gt)) < 20)
		return false;

	if (hwe->class != XE_ENGINE_CLASS_COMPUTE &&
	    hwe->class != XE_ENGINE_CLASS_RENDER)
		return false;

	return xe_mmio_read32(hwe->gt, XEHP_FUSE4) & CFEG_WMTP_DISABLE;
}

void
xe_hw_engine_setup_default_lrc_state(struct xe_hw_engine *hwe)
{
	struct xe_gt *gt = hwe->gt;
	const u8 mocs_write_idx = gt->mocs.uc_index;
	const u8 mocs_read_idx = gt->mocs.uc_index;
	u32 blit_cctl_val = REG_FIELD_PREP(BLIT_CCTL_DST_MOCS_MASK, mocs_write_idx) |
			    REG_FIELD_PREP(BLIT_CCTL_SRC_MOCS_MASK, mocs_read_idx);
	struct xe_rtp_process_ctx ctx = XE_RTP_PROCESS_CTX_INITIALIZER(hwe);
	const struct xe_rtp_entry_sr lrc_was[] = {
		/*
		 * Some blitter commands do not have a field for MOCS, those
		 * commands will use MOCS index pointed by BLIT_CCTL.
		 * BLIT_CCTL registers are needed to be programmed to un-cached.
		 */
		{ XE_RTP_NAME("BLIT_CCTL_default_MOCS"),
		  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1200, XE_RTP_END_VERSION_UNDEFINED),
			       ENGINE_CLASS(COPY)),
		  XE_RTP_ACTIONS(FIELD_SET(BLIT_CCTL(0),
				 BLIT_CCTL_DST_MOCS_MASK |
				 BLIT_CCTL_SRC_MOCS_MASK,
				 blit_cctl_val,
				 XE_RTP_ACTION_FLAG(ENGINE_BASE)))
		},
		/* Use Fixed slice CCS mode */
		{ XE_RTP_NAME("RCU_MODE_FIXED_SLICE_CCS_MODE"),
		  XE_RTP_RULES(FUNC(xe_hw_engine_match_fixed_cslice_mode)),
		  XE_RTP_ACTIONS(FIELD_SET(RCU_MODE, RCU_MODE_FIXED_SLICE_CCS_MODE,
					   RCU_MODE_FIXED_SLICE_CCS_MODE))
		},
		/* Disable WMTP if HW doesn't support it */
		{ XE_RTP_NAME("DISABLE_WMTP_ON_UNSUPPORTED_HW"),
		  XE_RTP_RULES(FUNC(xe_rtp_cfeg_wmtp_disabled)),
		  XE_RTP_ACTIONS(FIELD_SET(CS_CHICKEN1(0),
					   PREEMPT_GPGPU_LEVEL_MASK,
					   PREEMPT_GPGPU_THREAD_GROUP_LEVEL)),
		  XE_RTP_ENTRY_FLAG(FOREACH_ENGINE)
		},
		{}
	};

	xe_rtp_process_to_sr(&ctx, lrc_was, &hwe->reg_lrc);
}

static void
hw_engine_setup_default_state(struct xe_hw_engine *hwe)
{
	struct xe_gt *gt = hwe->gt;
	struct xe_device *xe = gt_to_xe(gt);
	/*
	 * RING_CMD_CCTL specifies the default MOCS entry that will be
	 * used by the command streamer when executing commands that
	 * don't have a way to explicitly specify a MOCS setting.
	 * The default should usually reference whichever MOCS entry
	 * corresponds to uncached behavior, although use of a WB cached
	 * entry is recommended by the spec in certain circumstances on
	 * specific platforms.
	 * Bspec: 72161
	 */
	const u8 mocs_write_idx = gt->mocs.uc_index;
	const u8 mocs_read_idx = hwe->class == XE_ENGINE_CLASS_COMPUTE &&
				 (GRAPHICS_VER(xe) >= 20 || xe->info.platform == XE_PVC) ?
				 gt->mocs.wb_index : gt->mocs.uc_index;
	u32 ring_cmd_cctl_val = REG_FIELD_PREP(CMD_CCTL_WRITE_OVERRIDE_MASK, mocs_write_idx) |
				REG_FIELD_PREP(CMD_CCTL_READ_OVERRIDE_MASK, mocs_read_idx);
	struct xe_rtp_process_ctx ctx = XE_RTP_PROCESS_CTX_INITIALIZER(hwe);
	const struct xe_rtp_entry_sr engine_entries[] = {
		{ XE_RTP_NAME("RING_CMD_CCTL_default_MOCS"),
		  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1200, XE_RTP_END_VERSION_UNDEFINED)),
		  XE_RTP_ACTIONS(FIELD_SET(RING_CMD_CCTL(0),
					   CMD_CCTL_WRITE_OVERRIDE_MASK |
					   CMD_CCTL_READ_OVERRIDE_MASK,
					   ring_cmd_cctl_val,
					   XE_RTP_ACTION_FLAG(ENGINE_BASE)))
		},
		/*
		 * To allow the GSC engine to go idle on MTL we need to enable
		 * idle messaging and set the hysteresis value (we use 0xA=5us
		 * as recommended in spec). On platforms after MTL this is
		 * enabled by default.
		 */
		{ XE_RTP_NAME("MTL GSCCS IDLE MSG enable"),
		  XE_RTP_RULES(MEDIA_VERSION(1300), ENGINE_CLASS(OTHER)),
		  XE_RTP_ACTIONS(CLR(RING_PSMI_CTL(0),
				     IDLE_MSG_DISABLE,
				     XE_RTP_ACTION_FLAG(ENGINE_BASE)),
				 FIELD_SET(RING_PWRCTX_MAXCNT(0),
					   IDLE_WAIT_TIME,
					   0xA,
					   XE_RTP_ACTION_FLAG(ENGINE_BASE)))
		},
		{}
	};

	xe_rtp_process_to_sr(&ctx, engine_entries, &hwe->reg_sr);
}

static void hw_engine_init_early(struct xe_gt *gt, struct xe_hw_engine *hwe,
				 enum xe_hw_engine_id id)
{
	const struct engine_info *info;

	if (WARN_ON(id >= ARRAY_SIZE(engine_infos) || !engine_infos[id].name))
		return;

	if (!(gt->info.engine_mask & BIT(id)))
		return;

	info = &engine_infos[id];

	xe_gt_assert(gt, !hwe->gt);

	hwe->gt = gt;
	hwe->class = info->class;
	hwe->instance = info->instance;
	hwe->mmio_base = info->mmio_base;
	hwe->irq_offset = info->irq_offset;
	hwe->domain = info->domain;
	hwe->name = info->name;
	hwe->fence_irq = &gt->fence_irq[info->class];
	hwe->engine_id = id;

	hwe->eclass = &gt->eclass[hwe->class];
	if (!hwe->eclass->sched_props.job_timeout_ms) {
		hwe->eclass->sched_props.job_timeout_ms = 5 * 1000;
		hwe->eclass->sched_props.job_timeout_min = XE_HW_ENGINE_JOB_TIMEOUT_MIN;
		hwe->eclass->sched_props.job_timeout_max = XE_HW_ENGINE_JOB_TIMEOUT_MAX;
		hwe->eclass->sched_props.timeslice_us = 1 * 1000;
		hwe->eclass->sched_props.timeslice_min = XE_HW_ENGINE_TIMESLICE_MIN;
		hwe->eclass->sched_props.timeslice_max = XE_HW_ENGINE_TIMESLICE_MAX;
		hwe->eclass->sched_props.preempt_timeout_us = XE_HW_ENGINE_PREEMPT_TIMEOUT;
		hwe->eclass->sched_props.preempt_timeout_min = XE_HW_ENGINE_PREEMPT_TIMEOUT_MIN;
		hwe->eclass->sched_props.preempt_timeout_max = XE_HW_ENGINE_PREEMPT_TIMEOUT_MAX;

		/*
		 * The GSC engine can accept submissions while the GSC shim is
		 * being reset, during which time the submission is stalled. In
		 * the worst case, the shim reset can take up to the maximum GSC
		 * command execution time (250ms), so the request start can be
		 * delayed by that much; the request itself can take that long
		 * without being preemptible, which means worst case it can
		 * theoretically take up to 500ms for a preemption to go through
		 * on the GSC engine. Adding to that an extra 100ms as a safety
		 * margin, we get a minimum recommended timeout of 600ms.
		 * The preempt_timeout value can't be tuned for OTHER_CLASS
		 * because the class is reserved for kernel usage, so we just
		 * need to make sure that the starting value is above that
		 * threshold; since our default value (640ms) is greater than
		 * 600ms, the only way we can go below is via a kconfig setting.
		 * If that happens, log it in dmesg and update the value.
		 */
		if (hwe->class == XE_ENGINE_CLASS_OTHER) {
			const u32 min_preempt_timeout = 600 * 1000;
			if (hwe->eclass->sched_props.preempt_timeout_us < min_preempt_timeout) {
				hwe->eclass->sched_props.preempt_timeout_us = min_preempt_timeout;
				xe_gt_notice(gt, "Increasing preempt_timeout for GSC to 600ms\n");
			}
		}

		/* Record default props */
		hwe->eclass->defaults = hwe->eclass->sched_props;
	}

	xe_reg_sr_init(&hwe->reg_sr, hwe->name, gt_to_xe(gt));
	xe_tuning_process_engine(hwe);
	xe_wa_process_engine(hwe);
	hw_engine_setup_default_state(hwe);

	xe_reg_sr_init(&hwe->reg_whitelist, hwe->name, gt_to_xe(gt));
	xe_reg_whitelist_process_engine(hwe);
}

static int hw_engine_init(struct xe_gt *gt, struct xe_hw_engine *hwe,
			  enum xe_hw_engine_id id)
{
	struct xe_device *xe = gt_to_xe(gt);
	struct xe_tile *tile = gt_to_tile(gt);
	int err;

	xe_gt_assert(gt, id < ARRAY_SIZE(engine_infos) && engine_infos[id].name);
	xe_gt_assert(gt, gt->info.engine_mask & BIT(id));

	xe_reg_sr_apply_mmio(&hwe->reg_sr, gt);
	xe_reg_sr_apply_whitelist(hwe);

	hwe->hwsp = xe_managed_bo_create_pin_map(xe, tile, SZ_4K,
						 XE_BO_FLAG_VRAM_IF_DGFX(tile) |
						 XE_BO_FLAG_GGTT |
						 XE_BO_FLAG_GGTT_INVALIDATE);
	if (IS_ERR(hwe->hwsp)) {
		err = PTR_ERR(hwe->hwsp);
		goto err_name;
	}

	err = xe_lrc_init(&hwe->kernel_lrc, hwe, NULL, NULL, SZ_16K);
	if (err)
		goto err_hwsp;

	if (!xe_device_uc_enabled(xe)) {
		hwe->exl_port = xe_execlist_port_create(xe, hwe);
		if (IS_ERR(hwe->exl_port)) {
			err = PTR_ERR(hwe->exl_port);
			goto err_kernel_lrc;
		}
	}

	if (xe_device_uc_enabled(xe)) {
		/* GSCCS has a special interrupt for reset */
		if (hwe->class == XE_ENGINE_CLASS_OTHER)
			hwe->irq_handler = xe_gsc_hwe_irq_handler;

		xe_hw_engine_enable_ring(hwe);
	}

	/* We reserve the highest BCS instance for USM */
	if (xe->info.has_usm && hwe->class == XE_ENGINE_CLASS_COPY)
		gt->usm.reserved_bcs_instance = hwe->instance;

	return drmm_add_action_or_reset(&xe->drm, hw_engine_fini, hwe);

err_kernel_lrc:
	xe_lrc_finish(&hwe->kernel_lrc);
err_hwsp:
	xe_bo_unpin_map_no_vm(hwe->hwsp);
err_name:
	hwe->name = NULL;

	return err;
}

static void hw_engine_setup_logical_mapping(struct xe_gt *gt)
{
	int class;

	/* FIXME: Doing a simple logical mapping that works for most hardware */
	for (class = 0; class < XE_ENGINE_CLASS_MAX; ++class) {
		struct xe_hw_engine *hwe;
		enum xe_hw_engine_id id;
		int logical_instance = 0;

		for_each_hw_engine(hwe, gt, id)
			if (hwe->class == class)
				hwe->logical_instance = logical_instance++;
	}
}

static void read_media_fuses(struct xe_gt *gt)
{
	struct xe_device *xe = gt_to_xe(gt);
	u32 media_fuse;
	u16 vdbox_mask;
	u16 vebox_mask;
	int i, j;

	xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);

	media_fuse = xe_mmio_read32(gt, GT_VEBOX_VDBOX_DISABLE);

	/*
	 * Pre-Xe_HP platforms had register bits representing absent engines,
	 * whereas Xe_HP and beyond have bits representing present engines.
	 * Invert the polarity on old platforms so that we can use common
	 * handling below.
	 */
	if (GRAPHICS_VERx100(xe) < 1250)
		media_fuse = ~media_fuse;

	vdbox_mask = REG_FIELD_GET(GT_VDBOX_DISABLE_MASK, media_fuse);
	vebox_mask = REG_FIELD_GET(GT_VEBOX_DISABLE_MASK, media_fuse);

	for (i = XE_HW_ENGINE_VCS0, j = 0; i <= XE_HW_ENGINE_VCS7; ++i, ++j) {
		if (!(gt->info.engine_mask & BIT(i)))
			continue;

		if (!(BIT(j) & vdbox_mask)) {
			gt->info.engine_mask &= ~BIT(i);
			drm_info(&xe->drm, "vcs%u fused off\n", j);
		}
	}

	for (i = XE_HW_ENGINE_VECS0, j = 0; i <= XE_HW_ENGINE_VECS3; ++i, ++j) {
		if (!(gt->info.engine_mask & BIT(i)))
			continue;

		if (!(BIT(j) & vebox_mask)) {
			gt->info.engine_mask &= ~BIT(i);
			drm_info(&xe->drm, "vecs%u fused off\n", j);
		}
	}
}

static void read_copy_fuses(struct xe_gt *gt)
{
	struct xe_device *xe = gt_to_xe(gt);
	u32 bcs_mask;

	if (GRAPHICS_VERx100(xe) < 1260 || GRAPHICS_VERx100(xe) >= 1270)
		return;

	xe_force_wake_assert_held(gt_to_fw(gt), XE_FW_GT);

	bcs_mask = xe_mmio_read32(gt, MIRROR_FUSE3);
	bcs_mask = REG_FIELD_GET(MEML3_EN_MASK, bcs_mask);

	/* BCS0 is always present; only BCS1-BCS8 may be fused off */
	for (int i = XE_HW_ENGINE_BCS1, j = 0; i <= XE_HW_ENGINE_BCS8; ++i, ++j) {
		if (!(gt->info.engine_mask & BIT(i)))
			continue;

		if (!(BIT(j / 2) & bcs_mask)) {
			gt->info.engine_mask &= ~BIT(i);
			drm_info(&xe->drm, "bcs%u fused off\n", j);
		}
	}
}

static void read_compute_fuses_from_dss(struct xe_gt *gt)
{
	struct xe_device *xe = gt_to_xe(gt);

	/*
	 * CCS fusing based on DSS masks only applies to platforms that can
	 * have more than one CCS.
	 */
	if (hweight64(gt->info.engine_mask &
		      GENMASK_ULL(XE_HW_ENGINE_CCS3, XE_HW_ENGINE_CCS0)) <= 1)
		return;

	/*
	 * CCS availability on Xe_HP is inferred from the presence of DSS in
	 * each quadrant.
	 */
	for (int i = XE_HW_ENGINE_CCS0, j = 0; i <= XE_HW_ENGINE_CCS3; ++i, ++j) {
		if (!(gt->info.engine_mask & BIT(i)))
			continue;

		if (!xe_gt_topology_has_dss_in_quadrant(gt, j)) {
			gt->info.engine_mask &= ~BIT(i);
			drm_info(&xe->drm, "ccs%u fused off\n", j);
		}
	}
}

static void read_compute_fuses_from_reg(struct xe_gt *gt)
{
	struct xe_device *xe = gt_to_xe(gt);
	u32 ccs_mask;

	ccs_mask = xe_mmio_read32(gt, XEHP_FUSE4);
	ccs_mask = REG_FIELD_GET(CCS_EN_MASK, ccs_mask);

	for (int i = XE_HW_ENGINE_CCS0, j = 0; i <= XE_HW_ENGINE_CCS3; ++i, ++j) {
		if (!(gt->info.engine_mask & BIT(i)))
			continue;

		if ((ccs_mask & BIT(j)) == 0) {
			gt->info.engine_mask &= ~BIT(i);
			drm_info(&xe->drm, "ccs%u fused off\n", j);
		}
	}
}

static void read_compute_fuses(struct xe_gt *gt)
{
	if (GRAPHICS_VER(gt_to_xe(gt)) >= 20)
		read_compute_fuses_from_reg(gt);
	else
		read_compute_fuses_from_dss(gt);
}

static void check_gsc_availability(struct xe_gt *gt)
{
	struct xe_device *xe = gt_to_xe(gt);

	if (!(gt->info.engine_mask & BIT(XE_HW_ENGINE_GSCCS0)))
		return;

	/*
	 * The GSCCS is only used to communicate with the GSC FW, so if we don't
	 * have the FW there is nothing we need the engine for and can therefore
	 * skip its initialization.
	 */
	if (!xe_uc_fw_is_available(&gt->uc.gsc.fw)) {
		gt->info.engine_mask &= ~BIT(XE_HW_ENGINE_GSCCS0);
		drm_info(&xe->drm, "gsccs disabled due to lack of FW\n");
	}
}

int xe_hw_engines_init_early(struct xe_gt *gt)
{
	int i;

	read_media_fuses(gt);
	read_copy_fuses(gt);
	read_compute_fuses(gt);
	check_gsc_availability(gt);

	BUILD_BUG_ON(XE_HW_ENGINE_PREEMPT_TIMEOUT < XE_HW_ENGINE_PREEMPT_TIMEOUT_MIN);
	BUILD_BUG_ON(XE_HW_ENGINE_PREEMPT_TIMEOUT > XE_HW_ENGINE_PREEMPT_TIMEOUT_MAX);

	for (i = 0; i < ARRAY_SIZE(gt->hw_engines); i++)
		hw_engine_init_early(gt, &gt->hw_engines[i], i);

	return 0;
}

int xe_hw_engines_init(struct xe_gt *gt)
{
	int err;
	struct xe_hw_engine *hwe;
	enum xe_hw_engine_id id;

	for_each_hw_engine(hwe, gt, id) {
		err = hw_engine_init(gt, hwe, id);
		if (err)
			return err;
	}

	hw_engine_setup_logical_mapping(gt);

	return 0;
}

void xe_hw_engine_handle_irq(struct xe_hw_engine *hwe, u16 intr_vec)
{
	wake_up_all(&gt_to_xe(hwe->gt)->ufence_wq);

	if (hwe->irq_handler)
		hwe->irq_handler(hwe, intr_vec);

	if (intr_vec & GT_RENDER_USER_INTERRUPT)
		xe_hw_fence_irq_run(hwe->fence_irq);
}

/**
 * xe_hw_engine_snapshot_capture - Take a quick snapshot of the HW Engine.
 * @hwe: Xe HW Engine.
 *
 * This can be printed out in a later stage like during dev_coredump
 * analysis.
 *
 * Returns: a Xe HW Engine snapshot object that must be freed by the
 * caller, using `xe_hw_engine_snapshot_free`.
 */
struct xe_hw_engine_snapshot *
xe_hw_engine_snapshot_capture(struct xe_hw_engine *hwe)
{
	struct xe_hw_engine_snapshot *snapshot;
	u64 val;

	if (!xe_hw_engine_is_valid(hwe))
		return NULL;

	snapshot = kzalloc(sizeof(*snapshot), GFP_ATOMIC);

	if (!snapshot)
		return NULL;

	snapshot->name = kstrdup(hwe->name, GFP_ATOMIC);
	snapshot->class = hwe->class;
	snapshot->logical_instance = hwe->logical_instance;
	snapshot->forcewake.domain = hwe->domain;
	snapshot->forcewake.ref = xe_force_wake_ref(gt_to_fw(hwe->gt),
						    hwe->domain);
	snapshot->mmio_base = hwe->mmio_base;

	/* no more VF accessible data below this point */
	if (IS_SRIOV_VF(gt_to_xe(hwe->gt)))
		return snapshot;

	snapshot->reg.ring_execlist_status =
		hw_engine_mmio_read32(hwe, RING_EXECLIST_STATUS_LO(0));
	val = hw_engine_mmio_read32(hwe, RING_EXECLIST_STATUS_HI(0));
	snapshot->reg.ring_execlist_status |= val << 32;

	snapshot->reg.ring_execlist_sq_contents =
		hw_engine_mmio_read32(hwe, RING_EXECLIST_SQ_CONTENTS_LO(0));
	val = hw_engine_mmio_read32(hwe, RING_EXECLIST_SQ_CONTENTS_HI(0));
	snapshot->reg.ring_execlist_sq_contents |= val << 32;

	snapshot->reg.ring_acthd = hw_engine_mmio_read32(hwe, RING_ACTHD(0));
	val = hw_engine_mmio_read32(hwe, RING_ACTHD_UDW(0));
	snapshot->reg.ring_acthd |= val << 32;

	snapshot->reg.ring_bbaddr = hw_engine_mmio_read32(hwe, RING_BBADDR(0));
	val = hw_engine_mmio_read32(hwe, RING_BBADDR_UDW(0));
	snapshot->reg.ring_bbaddr |= val << 32;

	snapshot->reg.ring_dma_fadd =
		hw_engine_mmio_read32(hwe, RING_DMA_FADD(0));
	val = hw_engine_mmio_read32(hwe, RING_DMA_FADD_UDW(0));
	snapshot->reg.ring_dma_fadd |= val << 32;

	snapshot->reg.ring_hwstam = hw_engine_mmio_read32(hwe, RING_HWSTAM(0));
	snapshot->reg.ring_hws_pga = hw_engine_mmio_read32(hwe, RING_HWS_PGA(0));
	snapshot->reg.ring_start = hw_engine_mmio_read32(hwe, RING_START(0));
	snapshot->reg.ring_head =
		hw_engine_mmio_read32(hwe, RING_HEAD(0)) & HEAD_ADDR;
	snapshot->reg.ring_tail =
		hw_engine_mmio_read32(hwe, RING_TAIL(0)) & TAIL_ADDR;
	snapshot->reg.ring_ctl = hw_engine_mmio_read32(hwe, RING_CTL(0));
	snapshot->reg.ring_mi_mode =
		hw_engine_mmio_read32(hwe, RING_MI_MODE(0));
	snapshot->reg.ring_mode = hw_engine_mmio_read32(hwe, RING_MODE(0));
	snapshot->reg.ring_imr = hw_engine_mmio_read32(hwe, RING_IMR(0));
	snapshot->reg.ring_esr = hw_engine_mmio_read32(hwe, RING_ESR(0));
	snapshot->reg.ring_emr = hw_engine_mmio_read32(hwe, RING_EMR(0));
	snapshot->reg.ring_eir = hw_engine_mmio_read32(hwe, RING_EIR(0));
	snapshot->reg.ipehr = hw_engine_mmio_read32(hwe, RING_IPEHR(0));

	if (snapshot->class == XE_ENGINE_CLASS_COMPUTE)
		snapshot->reg.rcu_mode = xe_mmio_read32(hwe->gt, RCU_MODE);

	return snapshot;
}

/**
 * xe_hw_engine_snapshot_print - Print out a given Xe HW Engine snapshot.
 * @snapshot: Xe HW Engine snapshot object.
 * @p: drm_printer where it will be printed out.
 *
 * This function prints out a given Xe HW Engine snapshot object.
 */
void xe_hw_engine_snapshot_print(struct xe_hw_engine_snapshot *snapshot,
				 struct drm_printer *p)
{
	if (!snapshot)
		return;

	drm_printf(p, "%s (physical), logical instance=%d\n",
		   snapshot->name ? snapshot->name : "",
		   snapshot->logical_instance);
	drm_printf(p, "\tForcewake: domain 0x%x, ref %d\n",
		   snapshot->forcewake.domain, snapshot->forcewake.ref);
	drm_printf(p, "\tHWSTAM: 0x%08x\n", snapshot->reg.ring_hwstam);
	drm_printf(p, "\tRING_HWS_PGA: 0x%08x\n", snapshot->reg.ring_hws_pga);
	drm_printf(p, "\tRING_EXECLIST_STATUS: 0x%016llx\n",
		   snapshot->reg.ring_execlist_status);
	drm_printf(p, "\tRING_EXECLIST_SQ_CONTENTS: 0x%016llx\n",
		   snapshot->reg.ring_execlist_sq_contents);
	drm_printf(p, "\tRING_START: 0x%08x\n", snapshot->reg.ring_start);
	drm_printf(p, "\tRING_HEAD: 0x%08x\n", snapshot->reg.ring_head);
	drm_printf(p, "\tRING_TAIL: 0x%08x\n", snapshot->reg.ring_tail);
	drm_printf(p, "\tRING_CTL: 0x%08x\n", snapshot->reg.ring_ctl);
	drm_printf(p, "\tRING_MI_MODE: 0x%08x\n", snapshot->reg.ring_mi_mode);
	drm_printf(p, "\tRING_MODE: 0x%08x\n",
		   snapshot->reg.ring_mode);
	drm_printf(p, "\tRING_IMR: 0x%08x\n", snapshot->reg.ring_imr);
	drm_printf(p, "\tRING_ESR: 0x%08x\n", snapshot->reg.ring_esr);
	drm_printf(p, "\tRING_EMR: 0x%08x\n", snapshot->reg.ring_emr);
	drm_printf(p, "\tRING_EIR: 0x%08x\n", snapshot->reg.ring_eir);
	drm_printf(p, "\tACTHD: 0x%016llx\n", snapshot->reg.ring_acthd);
	drm_printf(p, "\tBBADDR: 0x%016llx\n", snapshot->reg.ring_bbaddr);
	drm_printf(p, "\tDMA_FADDR: 0x%016llx\n", snapshot->reg.ring_dma_fadd);
	drm_printf(p, "\tIPEHR: 0x%08x\n", snapshot->reg.ipehr);
	if (snapshot->class == XE_ENGINE_CLASS_COMPUTE)
		drm_printf(p, "\tRCU_MODE: 0x%08x\n",
			   snapshot->reg.rcu_mode);
}

/**
 * xe_hw_engine_snapshot_free - Free all allocated objects for a given snapshot.
 * @snapshot: Xe HW Engine snapshot object.
 *
 * This function free all the memory that needed to be allocated at capture
 * time.
 */
void xe_hw_engine_snapshot_free(struct xe_hw_engine_snapshot *snapshot)
{
	if (!snapshot)
		return;

	kfree(snapshot->name);
	kfree(snapshot);
}

/**
 * xe_hw_engine_print - Xe HW Engine Print.
 * @hwe: Hardware Engine.
 * @p: drm_printer.
 *
 * This function quickly capture a snapshot and immediately print it out.
 */
void xe_hw_engine_print(struct xe_hw_engine *hwe, struct drm_printer *p)
{
	struct xe_hw_engine_snapshot *snapshot;

	snapshot = xe_hw_engine_snapshot_capture(hwe);
	xe_hw_engine_snapshot_print(snapshot, p);
	xe_hw_engine_snapshot_free(snapshot);
}

u32 xe_hw_engine_mask_per_class(struct xe_gt *gt,
				enum xe_engine_class engine_class)
{
	u32 mask = 0;
	enum xe_hw_engine_id id;

	for (id = 0; id < XE_NUM_HW_ENGINES; ++id) {
		if (engine_infos[id].class == engine_class &&
		    gt->info.engine_mask & BIT(id))
			mask |= BIT(engine_infos[id].instance);
	}
	return mask;
}

bool xe_hw_engine_is_reserved(struct xe_hw_engine *hwe)
{
	struct xe_gt *gt = hwe->gt;
	struct xe_device *xe = gt_to_xe(gt);

	if (hwe->class == XE_ENGINE_CLASS_OTHER)
		return true;

	/* Check for engines disabled by ccs_mode setting */
	if (xe_gt_ccs_mode_enabled(gt) &&
	    hwe->class == XE_ENGINE_CLASS_COMPUTE &&
	    hwe->logical_instance >= gt->ccs_mode)
		return true;

	return xe->info.has_usm && hwe->class == XE_ENGINE_CLASS_COPY &&
		hwe->instance == gt->usm.reserved_bcs_instance;
}