// SPDX-License-Identifier: MIT
/*
* Copyright © 2021 Intel Corporation
*/
#include "xe_hw_engine.h"
#include <linux/nospec.h>
#include <drm/drm_managed.h>
#include <drm/drm_print.h>
#include <uapi/drm/xe_drm.h>
#include <generated/xe_wa_oob.h>
#include "regs/xe_engine_regs.h"
#include "regs/xe_gt_regs.h"
#include "regs/xe_irq_regs.h"
#include "xe_assert.h"
#include "xe_bo.h"
#include "xe_configfs.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_clock.h"
#include "xe_gt_printk.h"
#include "xe_gt_mcr.h"
#include "xe_gt_topology.h"
#include "xe_guc_capture.h"
#include "xe_hw_engine_group.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_reg_whitelist.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(void *arg)
{
struct xe_hw_engine *hwe = arg;
if (hwe->exl_port)
xe_execlist_port_destroy(hwe->exl_port);
hwe->gt = NULL;
}
/**
* xe_hw_engine_mmio_write32 ( ) - Write engine register
* @ hwe : engine
* @ reg : register to write into
* @ val : desired 32 - bit value to write
*
* This function will write val into an engine specific register .
* Forcewake must be held by the caller .
*
*/
void xe_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->mmio, reg, val);
}
/**
* xe_hw_engine_mmio_read32 ( ) - Read engine register
* @ hwe : engine
* @ reg : register to read from
*
* This function will read from an engine specific register .
* Forcewake must be held by the caller .
*
* Return : value of the 32 - bit register .
*/
u32 xe_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->mmio, 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);
u32 ring_mode = _MASKED_BIT_ENABLE(GFX_DISABLE_LEGACY_MODE);
if (hwe->class == XE_ENGINE_CLASS_COMPUTE && ccs_mask)
xe_mmio_write32(&hwe->gt->mmio, RCU_MODE,
_MASKED_BIT_ENABLE(RCU_MODE_CCS_ENABLE));
xe_hw_engine_mmio_write32(hwe, RING_HWSTAM(0 ), ~0 x0);
xe_hw_engine_mmio_write32(hwe, RING_HWS_PGA(0 ),
xe_bo_ggtt_addr(hwe->hwsp));
if (xe_device_has_msix(gt_to_xe(hwe->gt)))
ring_mode |= _MASKED_BIT_ENABLE(GFX_MSIX_INTERRUPT_ENABLE);
xe_hw_engine_mmio_write32(hwe, RING_MODE(0 ), ring_mode);
xe_hw_engine_mmio_write32(hwe, RING_MI_MODE(0 ),
_MASKED_BIT_DISABLE(STOP_RING));
xe_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->mmio, 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_setup[] = {
/*
* 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)))
},
/* 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_setup, ARRAY_SIZE(lrc_setup), &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 && IS_DGFX(xe) &&
(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 0 xA = 5 us
* 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,
0 xA,
XE_RTP_ACTION_FLAG(ENGINE_BASE)))
},
/* Enable Priority Mem Read */
{ XE_RTP_NAME("Priority_Mem_Read" ),
XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2001 , XE_RTP_END_VERSION_UNDEFINED)),
XE_RTP_ACTIONS(SET(CSFE_CHICKEN1(0 ), CS_PRIORITY_MEM_READ,
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))
},
};
xe_rtp_process_to_sr(&ctx, engine_entries, ARRAY_SIZE(engine_entries), &hwe->reg_sr);
}
static const struct engine_info *find_engine_info(enum xe_engine_class class , int instance)
{
const struct engine_info *info;
enum xe_hw_engine_id id;
for (id = 0 ; id < XE_NUM_HW_ENGINES; ++id) {
info = &engine_infos[id];
if (info->class == class && info->instance == instance)
return info;
}
return NULL;
}
static u16 get_msix_irq_offset(struct xe_gt *gt, enum xe_engine_class class )
{
/* For MSI-X, hw engines report to offset of engine instance zero */
const struct engine_info *info = find_engine_info(class , 0 );
xe_gt_assert(gt, info);
return info ? info->irq_offset : 0 ;
}
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 = xe_device_has_msix(gt_to_xe(gt)) ?
get_msix_irq_offset(gt, info->class ) :
info->irq_offset;
hwe->domain = info->domain;
hwe->name = info->name;
hwe->fence_irq = >->fence_irq[info->class ];
hwe->engine_id = id;
hwe->eclass = >->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 ( 250 ms ) , 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 500 ms for a preemption to go through
* on the GSC engine . Adding to that an extra 100 ms as a safety
* margin , we get a minimum recommended timeout of 600 ms .
* 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 ( 640 ms ) is greater than
* 600 ms , 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 void adjust_idledly(struct xe_hw_engine *hwe)
{
struct xe_gt *gt = hwe->gt;
u32 idledly, maxcnt;
u32 idledly_units_ps = 8 * gt->info.timestamp_base;
u32 maxcnt_units_ns = 640 ;
bool inhibit_switch = 0 ;
if (!IS_SRIOV_VF(gt_to_xe(hwe->gt)) && XE_WA(gt, 16023105232 )) {
idledly = xe_mmio_read32(>->mmio, RING_IDLEDLY(hwe->mmio_base));
maxcnt = xe_mmio_read32(>->mmio, RING_PWRCTX_MAXCNT(hwe->mmio_base));
inhibit_switch = idledly & INHIBIT_SWITCH_UNTIL_PREEMPTED;
idledly = REG_FIELD_GET(IDLE_DELAY, idledly);
idledly = DIV_ROUND_CLOSEST(idledly * idledly_units_ps, 1000 );
maxcnt = REG_FIELD_GET(IDLE_WAIT_TIME, maxcnt);
maxcnt *= maxcnt_units_ns;
if (xe_gt_WARN_ON(gt, idledly >= maxcnt || inhibit_switch)) {
idledly = DIV_ROUND_CLOSEST(((maxcnt - 1 ) * maxcnt_units_ns),
idledly_units_ps);
idledly = DIV_ROUND_CLOSEST(idledly, 1000 );
xe_mmio_write32(>->mmio, RING_IDLEDLY(hwe->mmio_base), idledly);
}
}
}
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);
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;
}
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_hwsp;
}
} else {
/* GSCCS has a special interrupt for reset */
if (hwe->class == XE_ENGINE_CLASS_OTHER)
hwe->irq_handler = xe_gsc_hwe_irq_handler;
if (!IS_SRIOV_VF(xe))
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;
/* Ensure IDLEDLY is lower than MAXCNT */
adjust_idledly(hwe);
return devm_add_action_or_reset(xe->drm.dev, hw_engine_fini, hwe);
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(>->mmio, 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);
xe_gt_info(gt, "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);
xe_gt_info(gt, "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(>->mmio, 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);
xe_gt_info(gt, "bcs%u fused off\n" , j);
}
}
}
static void read_compute_fuses_from_dss(struct xe_gt *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);
xe_gt_info(gt, "ccs%u fused off\n" , j);
}
}
}
static void read_compute_fuses_from_reg(struct xe_gt *gt)
{
u32 ccs_mask;
ccs_mask = xe_mmio_read32(>->mmio, 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);
xe_gt_info(gt, "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)
{
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(>->uc.gsc.fw)) {
gt->info.engine_mask &= ~BIT(XE_HW_ENGINE_GSCCS0);
/* interrupts where previously enabled, so turn them off */
xe_mmio_write32(>->mmio, GUNIT_GSC_INTR_ENABLE, 0 );
xe_mmio_write32(>->mmio, GUNIT_GSC_INTR_MASK, ~0 );
xe_gt_dbg(gt, "GSC FW not used, disabling gsccs\n" );
}
}
static void check_sw_disable(struct xe_gt *gt)
{
struct xe_device *xe = gt_to_xe(gt);
u64 sw_allowed = xe_configfs_get_engines_allowed(to_pci_dev(xe->drm.dev));
enum xe_hw_engine_id id;
for (id = 0 ; id < XE_NUM_HW_ENGINES; ++id) {
if (!(gt->info.engine_mask & BIT(id)))
continue ;
if (!(sw_allowed & BIT(id))) {
gt->info.engine_mask &= ~BIT(id);
xe_gt_info(gt, "%s disabled via configfs\n" ,
engine_infos[id].name);
}
}
}
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);
check_sw_disable(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, >->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);
err = xe_hw_engine_setup_groups(gt);
if (err)
return err;
return 0 ;
}
void xe_hw_engine_handle_irq(struct xe_hw_engine *hwe, u16 intr_vec)
{
wake_up_all(>_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 .
* @ q : The exec queue object .
*
* 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_exec_queue *q)
{
struct xe_hw_engine_snapshot *snapshot;
struct __guc_capture_parsed_output *node;
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->hwe = hwe;
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;
snapshot->kernel_reserved = xe_hw_engine_is_reserved(hwe);
/* no more VF accessible data below this point */
if (IS_SRIOV_VF(gt_to_xe(hwe->gt)))
return snapshot;
if (q) {
/* If got guc capture, set source to GuC */
node = xe_guc_capture_get_matching_and_lock(q);
if (node) {
struct xe_device *xe = gt_to_xe(hwe->gt);
struct xe_devcoredump *coredump = &xe->devcoredump;
coredump->snapshot.matched_node = node;
xe_gt_dbg(hwe->gt, "Found and locked GuC-err-capture node" );
return snapshot;
}
}
/* otherwise, do manual capture */
xe_engine_manual_capture(hwe, snapshot);
xe_gt_dbg(hwe->gt, "Proceeding with manual engine snapshot" );
return snapshot;
}
/**
* 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)
{
struct xe_gt *gt;
if (!snapshot)
return ;
gt = snapshot->hwe->gt;
/*
* xe_guc_capture_put_matched_nodes is called here and from
* xe_devcoredump_snapshot_free , to cover the 2 calling paths
* of hw_engines - debugfs and devcoredump free .
*/
xe_guc_capture_put_matched_nodes(>->uc.guc);
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, NULL);
xe_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;
}
const char *xe_hw_engine_class_to_str(enum xe_engine_class class )
{
switch (class ) {
case XE_ENGINE_CLASS_RENDER:
return "rcs" ;
case XE_ENGINE_CLASS_VIDEO_DECODE:
return "vcs" ;
case XE_ENGINE_CLASS_VIDEO_ENHANCE:
return "vecs" ;
case XE_ENGINE_CLASS_COPY:
return "bcs" ;
case XE_ENGINE_CLASS_OTHER:
return "other" ;
case XE_ENGINE_CLASS_COMPUTE:
return "ccs" ;
case XE_ENGINE_CLASS_MAX:
break ;
}
return NULL;
}
u64 xe_hw_engine_read_timestamp(struct xe_hw_engine *hwe)
{
return xe_mmio_read64_2x32(&hwe->gt->mmio, RING_TIMESTAMP(hwe->mmio_base));
}
enum xe_force_wake_domains xe_hw_engine_to_fw_domain(struct xe_hw_engine *hwe)
{
return engine_infos[hwe->engine_id].domain;
}
static const enum xe_engine_class user_to_xe_engine_class[] = {
[DRM_XE_ENGINE_CLASS_RENDER] = XE_ENGINE_CLASS_RENDER,
[DRM_XE_ENGINE_CLASS_COPY] = XE_ENGINE_CLASS_COPY,
[DRM_XE_ENGINE_CLASS_VIDEO_DECODE] = XE_ENGINE_CLASS_VIDEO_DECODE,
[DRM_XE_ENGINE_CLASS_VIDEO_ENHANCE] = XE_ENGINE_CLASS_VIDEO_ENHANCE,
[DRM_XE_ENGINE_CLASS_COMPUTE] = XE_ENGINE_CLASS_COMPUTE,
};
/**
* xe_hw_engine_lookup ( ) - Lookup hardware engine for class : instance
* @ xe : xe device
* @ eci : engine class and instance
*
* This function will find a hardware engine for given engine
* class and instance .
*
* Return : If found xe_hw_engine pointer , NULL otherwise .
*/
struct xe_hw_engine *
xe_hw_engine_lookup(struct xe_device *xe,
struct drm_xe_engine_class_instance eci)
{
struct xe_gt *gt = xe_device_get_gt(xe, eci.gt_id);
unsigned int idx;
if (eci.engine_class >= ARRAY_SIZE(user_to_xe_engine_class))
return NULL;
if (!gt)
return NULL;
idx = array_index_nospec(eci.engine_class,
ARRAY_SIZE(user_to_xe_engine_class));
return xe_gt_hw_engine(xe_device_get_gt(xe, eci.gt_id),
user_to_xe_engine_class[idx],
eci.engine_instance, true );
}
Messung V0.5 in Prozent C=98 H=95 G=96
¤ Dauer der Verarbeitung: 0.19 Sekunden
(vorverarbeitet am 2026-09-29)
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