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OpenCloudOS-Kernel/drivers/gpu/drm/i915/intel_workarounds.c

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/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2014-2018 Intel Corporation
*/
#include "i915_drv.h"
#include "intel_workarounds.h"
/**
* DOC: Hardware workarounds
*
* This file is intended as a central place to implement most [1]_ of the
* required workarounds for hardware to work as originally intended. They fall
* in five basic categories depending on how/when they are applied:
*
* - Workarounds that touch registers that are saved/restored to/from the HW
* context image. The list is emitted (via Load Register Immediate commands)
* everytime a new context is created.
* - GT workarounds. The list of these WAs is applied whenever these registers
* revert to default values (on GPU reset, suspend/resume [2]_, etc..).
* - Display workarounds. The list is applied during display clock-gating
* initialization.
* - Workarounds that whitelist a privileged register, so that UMDs can manage
* them directly. This is just a special case of a MMMIO workaround (as we
* write the list of these to/be-whitelisted registers to some special HW
* registers).
* - Workaround batchbuffers, that get executed automatically by the hardware
* on every HW context restore.
*
* .. [1] Please notice that there are other WAs that, due to their nature,
* cannot be applied from a central place. Those are peppered around the rest
* of the code, as needed.
*
* .. [2] Technically, some registers are powercontext saved & restored, so they
* survive a suspend/resume. In practice, writing them again is not too
* costly and simplifies things. We can revisit this in the future.
*
* Layout
* ''''''
*
* Keep things in this file ordered by WA type, as per the above (context, GT,
* display, register whitelist, batchbuffer). Then, inside each type, keep the
* following order:
*
* - Infrastructure functions and macros
* - WAs per platform in standard gen/chrono order
* - Public functions to init or apply the given workaround type.
*/
static void wa_add(struct drm_i915_private *i915,
i915_reg_t reg, const u32 mask, const u32 val)
{
struct i915_workarounds *wa = &i915->workarounds;
unsigned int start = 0, end = wa->count;
unsigned int addr = i915_mmio_reg_offset(reg);
struct i915_wa_reg *r;
while (start < end) {
unsigned int mid = start + (end - start) / 2;
if (wa->reg[mid].addr < addr) {
start = mid + 1;
} else if (wa->reg[mid].addr > addr) {
end = mid;
} else {
r = &wa->reg[mid];
if ((mask & ~r->mask) == 0) {
DRM_ERROR("Discarding overwritten w/a for reg %04x (mask: %08x, value: %08x)\n",
addr, r->mask, r->value);
r->value &= ~mask;
}
r->value |= val;
r->mask |= mask;
return;
}
}
if (WARN_ON_ONCE(wa->count >= I915_MAX_WA_REGS)) {
DRM_ERROR("Dropping w/a for reg %04x (mask: %08x, value: %08x)\n",
addr, mask, val);
return;
}
r = &wa->reg[wa->count++];
r->addr = addr;
r->value = val;
r->mask = mask;
while (r-- > wa->reg) {
GEM_BUG_ON(r[0].addr == r[1].addr);
if (r[1].addr > r[0].addr)
break;
swap(r[1], r[0]);
}
}
#define WA_REG(addr, mask, val) wa_add(dev_priv, (addr), (mask), (val))
#define WA_SET_BIT_MASKED(addr, mask) \
WA_REG(addr, (mask), _MASKED_BIT_ENABLE(mask))
#define WA_CLR_BIT_MASKED(addr, mask) \
WA_REG(addr, (mask), _MASKED_BIT_DISABLE(mask))
#define WA_SET_FIELD_MASKED(addr, mask, value) \
WA_REG(addr, (mask), _MASKED_FIELD(mask, value))
static int gen8_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
WA_SET_BIT_MASKED(INSTPM, INSTPM_FORCE_ORDERING);
/* WaDisableAsyncFlipPerfMode:bdw,chv */
WA_SET_BIT_MASKED(MI_MODE, ASYNC_FLIP_PERF_DISABLE);
/* WaDisablePartialInstShootdown:bdw,chv */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
/* Use Force Non-Coherent whenever executing a 3D context. This is a
* workaround for for a possible hang in the unlikely event a TLB
* invalidation occurs during a PSD flush.
*/
/* WaForceEnableNonCoherent:bdw,chv */
/* WaHdcDisableFetchWhenMasked:bdw,chv */
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_DONOT_FETCH_MEM_WHEN_MASKED |
HDC_FORCE_NON_COHERENT);
/* From the Haswell PRM, Command Reference: Registers, CACHE_MODE_0:
* "The Hierarchical Z RAW Stall Optimization allows non-overlapping
* polygons in the same 8x4 pixel/sample area to be processed without
* stalling waiting for the earlier ones to write to Hierarchical Z
* buffer."
*
* This optimization is off by default for BDW and CHV; turn it on.
*/
WA_CLR_BIT_MASKED(CACHE_MODE_0_GEN7, HIZ_RAW_STALL_OPT_DISABLE);
/* Wa4x4STCOptimizationDisable:bdw,chv */
WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE);
/*
* BSpec recommends 8x4 when MSAA is used,
* however in practice 16x4 seems fastest.
*
* Note that PS/WM thread counts depend on the WIZ hashing
* disable bit, which we don't touch here, but it's good
* to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
*/
WA_SET_FIELD_MASKED(GEN7_GT_MODE,
GEN6_WIZ_HASHING_MASK,
GEN6_WIZ_HASHING_16x4);
return 0;
}
static int bdw_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int ret;
ret = gen8_ctx_workarounds_init(dev_priv);
if (ret)
return ret;
/* WaDisableThreadStallDopClockGating:bdw (pre-production) */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE);
/* WaDisableDopClockGating:bdw
*
* Also see the related UCGTCL1 write in broadwell_init_clock_gating()
* to disable EUTC clock gating.
*/
WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
DOP_CLOCK_GATING_DISABLE);
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
GEN8_SAMPLER_POWER_BYPASS_DIS);
WA_SET_BIT_MASKED(HDC_CHICKEN0,
/* WaForceContextSaveRestoreNonCoherent:bdw */
HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT |
/* WaDisableFenceDestinationToSLM:bdw (pre-prod) */
(IS_BDW_GT3(dev_priv) ? HDC_FENCE_DEST_SLM_DISABLE : 0));
return 0;
}
static int chv_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int ret;
ret = gen8_ctx_workarounds_init(dev_priv);
if (ret)
return ret;
/* WaDisableThreadStallDopClockGating:chv */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, STALL_DOP_GATING_DISABLE);
/* Improve HiZ throughput on CHV. */
WA_SET_BIT_MASKED(HIZ_CHICKEN, CHV_HZ_8X8_MODE_IN_1X);
return 0;
}
static int gen9_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
if (HAS_LLC(dev_priv)) {
/* WaCompressedResourceSamplerPbeMediaNewHashMode:skl,kbl
*
* Must match Display Engine. See
* WaCompressedResourceDisplayNewHashMode.
*/
WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
GEN9_PBE_COMPRESSED_HASH_SELECTION);
WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,
GEN9_SAMPLER_HASH_COMPRESSED_READ_ADDR);
}
/* WaClearFlowControlGpgpuContextSave:skl,bxt,kbl,glk,cfl */
/* WaDisablePartialInstShootdown:skl,bxt,kbl,glk,cfl */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
FLOW_CONTROL_ENABLE |
PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
/* Syncing dependencies between camera and graphics:skl,bxt,kbl */
if (!IS_COFFEELAKE(dev_priv))
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC);
/* WaEnableYV12BugFixInHalfSliceChicken7:skl,bxt,kbl,glk,cfl */
/* WaEnableSamplerGPGPUPreemptionSupport:skl,bxt,kbl,cfl */
WA_SET_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN7,
GEN9_ENABLE_YV12_BUGFIX |
GEN9_ENABLE_GPGPU_PREEMPTION);
/* Wa4x4STCOptimizationDisable:skl,bxt,kbl,glk,cfl */
/* WaDisablePartialResolveInVc:skl,bxt,kbl,cfl */
WA_SET_BIT_MASKED(CACHE_MODE_1,
GEN8_4x4_STC_OPTIMIZATION_DISABLE |
GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE);
/* WaCcsTlbPrefetchDisable:skl,bxt,kbl,glk,cfl */
WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5,
GEN9_CCS_TLB_PREFETCH_ENABLE);
/* WaForceContextSaveRestoreNonCoherent:skl,bxt,kbl,cfl */
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT |
HDC_FORCE_CSR_NON_COHERENT_OVR_DISABLE);
/* WaForceEnableNonCoherent and WaDisableHDCInvalidation are
* both tied to WaForceContextSaveRestoreNonCoherent
* in some hsds for skl. We keep the tie for all gen9. The
* documentation is a bit hazy and so we want to get common behaviour,
* even though there is no clear evidence we would need both on kbl/bxt.
* This area has been source of system hangs so we play it safe
* and mimic the skl regardless of what bspec says.
*
* Use Force Non-Coherent whenever executing a 3D context. This
* is a workaround for a possible hang in the unlikely event
* a TLB invalidation occurs during a PSD flush.
*/
/* WaForceEnableNonCoherent:skl,bxt,kbl,cfl */
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_FORCE_NON_COHERENT);
/* WaDisableSamplerPowerBypassForSOPingPong:skl,bxt,kbl,cfl */
if (IS_SKYLAKE(dev_priv) ||
IS_KABYLAKE(dev_priv) ||
IS_COFFEELAKE(dev_priv))
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3,
GEN8_SAMPLER_POWER_BYPASS_DIS);
/* WaDisableSTUnitPowerOptimization:skl,bxt,kbl,glk,cfl */
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN2, GEN8_ST_PO_DISABLE);
/*
* Supporting preemption with fine-granularity requires changes in the
* batch buffer programming. Since we can't break old userspace, we
* need to set our default preemption level to safe value. Userspace is
* still able to use more fine-grained preemption levels, since in
* WaEnablePreemptionGranularityControlByUMD we're whitelisting the
* per-ctx register. As such, WaDisable{3D,GPGPU}MidCmdPreemption are
* not real HW workarounds, but merely a way to start using preemption
* while maintaining old contract with userspace.
*/
/* WaDisable3DMidCmdPreemption:skl,bxt,glk,cfl,[cnl] */
WA_CLR_BIT_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_3D_OBJECT_LEVEL);
/* WaDisableGPGPUMidCmdPreemption:skl,bxt,blk,cfl,[cnl] */
WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1,
GEN9_PREEMPT_GPGPU_LEVEL_MASK,
GEN9_PREEMPT_GPGPU_COMMAND_LEVEL);
/* WaClearHIZ_WM_CHICKEN3:bxt,glk */
if (IS_GEN9_LP(dev_priv))
WA_SET_BIT_MASKED(GEN9_WM_CHICKEN3, GEN9_FACTOR_IN_CLR_VAL_HIZ);
return 0;
}
static int skl_tune_iz_hashing(struct drm_i915_private *dev_priv)
{
u8 vals[3] = { 0, 0, 0 };
unsigned int i;
for (i = 0; i < 3; i++) {
u8 ss;
/*
* Only consider slices where one, and only one, subslice has 7
* EUs
*/
if (!is_power_of_2(INTEL_INFO(dev_priv)->sseu.subslice_7eu[i]))
continue;
/*
* subslice_7eu[i] != 0 (because of the check above) and
* ss_max == 4 (maximum number of subslices possible per slice)
*
* -> 0 <= ss <= 3;
*/
ss = ffs(INTEL_INFO(dev_priv)->sseu.subslice_7eu[i]) - 1;
vals[i] = 3 - ss;
}
if (vals[0] == 0 && vals[1] == 0 && vals[2] == 0)
return 0;
/* Tune IZ hashing. See intel_device_info_runtime_init() */
WA_SET_FIELD_MASKED(GEN7_GT_MODE,
GEN9_IZ_HASHING_MASK(2) |
GEN9_IZ_HASHING_MASK(1) |
GEN9_IZ_HASHING_MASK(0),
GEN9_IZ_HASHING(2, vals[2]) |
GEN9_IZ_HASHING(1, vals[1]) |
GEN9_IZ_HASHING(0, vals[0]));
return 0;
}
static int skl_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int ret;
ret = gen9_ctx_workarounds_init(dev_priv);
if (ret)
return ret;
return skl_tune_iz_hashing(dev_priv);
}
static int bxt_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int ret;
ret = gen9_ctx_workarounds_init(dev_priv);
if (ret)
return ret;
/* WaDisableThreadStallDopClockGating:bxt */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
STALL_DOP_GATING_DISABLE);
/* WaToEnableHwFixForPushConstHWBug:bxt */
WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
return 0;
}
static int kbl_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int ret;
ret = gen9_ctx_workarounds_init(dev_priv);
if (ret)
return ret;
/* WaDisableFenceDestinationToSLM:kbl (pre-prod) */
if (IS_KBL_REVID(dev_priv, KBL_REVID_A0, KBL_REVID_A0))
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_FENCE_DEST_SLM_DISABLE);
/* WaToEnableHwFixForPushConstHWBug:kbl */
if (IS_KBL_REVID(dev_priv, KBL_REVID_C0, REVID_FOREVER))
WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
/* WaDisableSbeCacheDispatchPortSharing:kbl */
WA_SET_BIT_MASKED(GEN7_HALF_SLICE_CHICKEN1,
GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
return 0;
}
static int glk_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int ret;
ret = gen9_ctx_workarounds_init(dev_priv);
if (ret)
return ret;
/* WaToEnableHwFixForPushConstHWBug:glk */
WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
return 0;
}
static int cfl_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int ret;
ret = gen9_ctx_workarounds_init(dev_priv);
if (ret)
return ret;
/* WaToEnableHwFixForPushConstHWBug:cfl */
WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
/* WaDisableSbeCacheDispatchPortSharing:cfl */
WA_SET_BIT_MASKED(GEN7_HALF_SLICE_CHICKEN1,
GEN7_SBE_SS_CACHE_DISPATCH_PORT_SHARING_DISABLE);
return 0;
}
static int cnl_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
/* WaForceContextSaveRestoreNonCoherent:cnl */
WA_SET_BIT_MASKED(CNL_HDC_CHICKEN0,
HDC_FORCE_CONTEXT_SAVE_RESTORE_NON_COHERENT);
/* WaThrottleEUPerfToAvoidTDBackPressure:cnl(pre-prod) */
if (IS_CNL_REVID(dev_priv, CNL_REVID_B0, CNL_REVID_B0))
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, THROTTLE_12_5);
/* WaDisableReplayBufferBankArbitrationOptimization:cnl */
WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION);
/* WaDisableEnhancedSBEVertexCaching:cnl (pre-prod) */
if (IS_CNL_REVID(dev_priv, 0, CNL_REVID_B0))
WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2,
GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE);
/* WaPushConstantDereferenceHoldDisable:cnl */
WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE);
/* FtrEnableFastAnisoL1BankingFix:cnl */
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, CNL_FAST_ANISO_L1_BANKING_FIX);
/* WaDisable3DMidCmdPreemption:cnl */
WA_CLR_BIT_MASKED(GEN8_CS_CHICKEN1, GEN9_PREEMPT_3D_OBJECT_LEVEL);
/* WaDisableGPGPUMidCmdPreemption:cnl */
WA_SET_FIELD_MASKED(GEN8_CS_CHICKEN1,
GEN9_PREEMPT_GPGPU_LEVEL_MASK,
GEN9_PREEMPT_GPGPU_COMMAND_LEVEL);
/* WaDisableEarlyEOT:cnl */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, DISABLE_EARLY_EOT);
return 0;
}
static int icl_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
/* Wa_1604370585:icl (pre-prod)
* Formerly known as WaPushConstantDereferenceHoldDisable
*/
if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_B0))
WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
PUSH_CONSTANT_DEREF_DISABLE);
/* WaForceEnableNonCoherent:icl
* This is not the same workaround as in early Gen9 platforms, where
* lacking this could cause system hangs, but coherency performance
* overhead is high and only a few compute workloads really need it
* (the register is whitelisted in hardware now, so UMDs can opt in
* for coherency if they have a good reason).
*/
WA_SET_BIT_MASKED(ICL_HDC_MODE, HDC_FORCE_NON_COHERENT);
/* Wa_2006611047:icl (pre-prod)
* Formerly known as WaDisableImprovedTdlClkGating
*/
if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_A0))
WA_SET_BIT_MASKED(GEN7_ROW_CHICKEN2,
GEN11_TDL_CLOCK_GATING_FIX_DISABLE);
/* WaEnableStateCacheRedirectToCS:icl */
WA_SET_BIT_MASKED(GEN9_SLICE_COMMON_ECO_CHICKEN1,
GEN11_STATE_CACHE_REDIRECT_TO_CS);
/* Wa_2006665173:icl (pre-prod) */
if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_A0))
WA_SET_BIT_MASKED(GEN11_COMMON_SLICE_CHICKEN3,
GEN11_BLEND_EMB_FIX_DISABLE_IN_RCC);
return 0;
}
int intel_ctx_workarounds_init(struct drm_i915_private *dev_priv)
{
int err = 0;
dev_priv->workarounds.count = 0;
if (INTEL_GEN(dev_priv) < 8)
err = 0;
else if (IS_BROADWELL(dev_priv))
err = bdw_ctx_workarounds_init(dev_priv);
else if (IS_CHERRYVIEW(dev_priv))
err = chv_ctx_workarounds_init(dev_priv);
else if (IS_SKYLAKE(dev_priv))
err = skl_ctx_workarounds_init(dev_priv);
else if (IS_BROXTON(dev_priv))
err = bxt_ctx_workarounds_init(dev_priv);
else if (IS_KABYLAKE(dev_priv))
err = kbl_ctx_workarounds_init(dev_priv);
else if (IS_GEMINILAKE(dev_priv))
err = glk_ctx_workarounds_init(dev_priv);
else if (IS_COFFEELAKE(dev_priv))
err = cfl_ctx_workarounds_init(dev_priv);
else if (IS_CANNONLAKE(dev_priv))
err = cnl_ctx_workarounds_init(dev_priv);
else if (IS_ICELAKE(dev_priv))
err = icl_ctx_workarounds_init(dev_priv);
else
MISSING_CASE(INTEL_GEN(dev_priv));
if (err)
return err;
DRM_DEBUG_DRIVER("Number of context specific w/a: %d\n",
dev_priv->workarounds.count);
return 0;
}
int intel_ctx_workarounds_emit(struct i915_request *rq)
{
struct i915_workarounds *w = &rq->i915->workarounds;
u32 *cs;
int ret, i;
if (w->count == 0)
return 0;
ret = rq->engine->emit_flush(rq, EMIT_BARRIER);
if (ret)
return ret;
cs = intel_ring_begin(rq, (w->count * 2 + 2));
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_LOAD_REGISTER_IMM(w->count);
for (i = 0; i < w->count; i++) {
*cs++ = w->reg[i].addr;
*cs++ = w->reg[i].value;
}
*cs++ = MI_NOOP;
intel_ring_advance(rq, cs);
ret = rq->engine->emit_flush(rq, EMIT_BARRIER);
if (ret)
return ret;
return 0;
}
static void bdw_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
}
static void chv_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
}
static void gen9_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
/* WaContextSwitchWithConcurrentTLBInvalidate:skl,bxt,kbl,glk,cfl */
I915_WRITE(GEN9_CSFE_CHICKEN1_RCS,
_MASKED_BIT_ENABLE(GEN9_PREEMPT_GPGPU_SYNC_SWITCH_DISABLE));
/* WaEnableLbsSlaRetryTimerDecrement:skl,bxt,kbl,glk,cfl */
I915_WRITE(BDW_SCRATCH1, I915_READ(BDW_SCRATCH1) |
GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE);
/* WaDisableKillLogic:bxt,skl,kbl */
if (!IS_COFFEELAKE(dev_priv))
I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) |
ECOCHK_DIS_TLB);
if (HAS_LLC(dev_priv)) {
/* WaCompressedResourceSamplerPbeMediaNewHashMode:skl,kbl
*
* Must match Display Engine. See
* WaCompressedResourceDisplayNewHashMode.
*/
I915_WRITE(MMCD_MISC_CTRL,
I915_READ(MMCD_MISC_CTRL) |
MMCD_PCLA |
MMCD_HOTSPOT_EN);
}
/* WaDisableHDCInvalidation:skl,bxt,kbl,cfl */
I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) |
BDW_DISABLE_HDC_INVALIDATION);
/* WaProgramL3SqcReg1DefaultForPerf:bxt,glk */
if (IS_GEN9_LP(dev_priv)) {
u32 val = I915_READ(GEN8_L3SQCREG1);
val &= ~L3_PRIO_CREDITS_MASK;
val |= L3_GENERAL_PRIO_CREDITS(62) | L3_HIGH_PRIO_CREDITS(2);
I915_WRITE(GEN8_L3SQCREG1, val);
}
/* WaOCLCoherentLineFlush:skl,bxt,kbl,cfl */
I915_WRITE(GEN8_L3SQCREG4,
I915_READ(GEN8_L3SQCREG4) | GEN8_LQSC_FLUSH_COHERENT_LINES);
/* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,[cnl] */
I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1,
_MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL));
}
static void skl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
gen9_gt_workarounds_apply(dev_priv);
/* WaEnableGapsTsvCreditFix:skl */
I915_WRITE(GEN8_GARBCNTL,
I915_READ(GEN8_GARBCNTL) | GEN9_GAPS_TSV_CREDIT_DISABLE);
/* WaDisableGafsUnitClkGating:skl */
I915_WRITE(GEN7_UCGCTL4,
I915_READ(GEN7_UCGCTL4) | GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE);
/* WaInPlaceDecompressionHang:skl */
if (IS_SKL_REVID(dev_priv, SKL_REVID_H0, REVID_FOREVER))
I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA,
I915_READ(GEN9_GAMT_ECO_REG_RW_IA) |
GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
}
static void bxt_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
gen9_gt_workarounds_apply(dev_priv);
/* WaDisablePooledEuLoadBalancingFix:bxt */
I915_WRITE(FF_SLICE_CS_CHICKEN2,
_MASKED_BIT_ENABLE(GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE));
/* WaInPlaceDecompressionHang:bxt */
I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA,
I915_READ(GEN9_GAMT_ECO_REG_RW_IA) |
GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
}
static void kbl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
gen9_gt_workarounds_apply(dev_priv);
/* WaEnableGapsTsvCreditFix:kbl */
I915_WRITE(GEN8_GARBCNTL,
I915_READ(GEN8_GARBCNTL) | GEN9_GAPS_TSV_CREDIT_DISABLE);
/* WaDisableDynamicCreditSharing:kbl */
if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0))
I915_WRITE(GAMT_CHKN_BIT_REG,
I915_READ(GAMT_CHKN_BIT_REG) |
GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING);
/* WaDisableGafsUnitClkGating:kbl */
I915_WRITE(GEN7_UCGCTL4,
I915_READ(GEN7_UCGCTL4) | GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE);
/* WaInPlaceDecompressionHang:kbl */
I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA,
I915_READ(GEN9_GAMT_ECO_REG_RW_IA) |
GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
/* WaKBLVECSSemaphoreWaitPoll:kbl */
if (IS_KBL_REVID(dev_priv, KBL_REVID_A0, KBL_REVID_E0)) {
struct intel_engine_cs *engine;
unsigned int tmp;
for_each_engine(engine, dev_priv, tmp) {
if (engine->id == RCS)
continue;
I915_WRITE(RING_SEMA_WAIT_POLL(engine->mmio_base), 1);
}
}
}
static void glk_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
gen9_gt_workarounds_apply(dev_priv);
}
static void cfl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
gen9_gt_workarounds_apply(dev_priv);
/* WaEnableGapsTsvCreditFix:cfl */
I915_WRITE(GEN8_GARBCNTL,
I915_READ(GEN8_GARBCNTL) | GEN9_GAPS_TSV_CREDIT_DISABLE);
/* WaDisableGafsUnitClkGating:cfl */
I915_WRITE(GEN7_UCGCTL4,
I915_READ(GEN7_UCGCTL4) | GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE);
/* WaInPlaceDecompressionHang:cfl */
I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA,
I915_READ(GEN9_GAMT_ECO_REG_RW_IA) |
GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
}
static void wa_init_mcr(struct drm_i915_private *dev_priv)
{
const struct sseu_dev_info *sseu = &(INTEL_INFO(dev_priv)->sseu);
u32 mcr;
u32 mcr_slice_subslice_mask;
/*
* WaProgramMgsrForL3BankSpecificMmioReads: cnl,icl
* L3Banks could be fused off in single slice scenario. If that is
* the case, we might need to program MCR select to a valid L3Bank
* by default, to make sure we correctly read certain registers
* later on (in the range 0xB100 - 0xB3FF).
* This might be incompatible with
* WaProgramMgsrForCorrectSliceSpecificMmioReads.
* Fortunately, this should not happen in production hardware, so
* we only assert that this is the case (instead of implementing
* something more complex that requires checking the range of every
* MMIO read).
*/
if (INTEL_GEN(dev_priv) >= 10 &&
is_power_of_2(sseu->slice_mask)) {
/*
* read FUSE3 for enabled L3 Bank IDs, if L3 Bank matches
* enabled subslice, no need to redirect MCR packet
*/
u32 slice = fls(sseu->slice_mask);
u32 fuse3 = I915_READ(GEN10_MIRROR_FUSE3);
u8 ss_mask = sseu->subslice_mask[slice];
u8 enabled_mask = (ss_mask | ss_mask >>
GEN10_L3BANK_PAIR_COUNT) & GEN10_L3BANK_MASK;
u8 disabled_mask = fuse3 & GEN10_L3BANK_MASK;
/*
* Production silicon should have matched L3Bank and
* subslice enabled
*/
WARN_ON((enabled_mask & disabled_mask) != enabled_mask);
}
mcr = I915_READ(GEN8_MCR_SELECTOR);
if (INTEL_GEN(dev_priv) >= 11)
mcr_slice_subslice_mask = GEN11_MCR_SLICE_MASK |
GEN11_MCR_SUBSLICE_MASK;
else
mcr_slice_subslice_mask = GEN8_MCR_SLICE_MASK |
GEN8_MCR_SUBSLICE_MASK;
/*
* WaProgramMgsrForCorrectSliceSpecificMmioReads:cnl,icl
* Before any MMIO read into slice/subslice specific registers, MCR
* packet control register needs to be programmed to point to any
* enabled s/ss pair. Otherwise, incorrect values will be returned.
* This means each subsequent MMIO read will be forwarded to an
* specific s/ss combination, but this is OK since these registers
* are consistent across s/ss in almost all cases. In the rare
* occasions, such as INSTDONE, where this value is dependent
* on s/ss combo, the read should be done with read_subslice_reg.
*/
mcr &= ~mcr_slice_subslice_mask;
mcr |= intel_calculate_mcr_s_ss_select(dev_priv);
I915_WRITE(GEN8_MCR_SELECTOR, mcr);
}
static void cnl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
wa_init_mcr(dev_priv);
/* WaDisableI2mCycleOnWRPort:cnl (pre-prod) */
if (IS_CNL_REVID(dev_priv, CNL_REVID_B0, CNL_REVID_B0))
I915_WRITE(GAMT_CHKN_BIT_REG,
I915_READ(GAMT_CHKN_BIT_REG) |
GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT);
/* WaInPlaceDecompressionHang:cnl */
I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA,
I915_READ(GEN9_GAMT_ECO_REG_RW_IA) |
GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
/* WaEnablePreemptionGranularityControlByUMD:cnl */
I915_WRITE(GEN7_FF_SLICE_CS_CHICKEN1,
_MASKED_BIT_ENABLE(GEN9_FFSC_PERCTX_PREEMPT_CTRL));
}
static void icl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
wa_init_mcr(dev_priv);
/* This is not an Wa. Enable for better image quality */
I915_WRITE(_3D_CHICKEN3,
_MASKED_BIT_ENABLE(_3D_CHICKEN3_AA_LINE_QUALITY_FIX_ENABLE));
/* WaInPlaceDecompressionHang:icl */
I915_WRITE(GEN9_GAMT_ECO_REG_RW_IA, I915_READ(GEN9_GAMT_ECO_REG_RW_IA) |
GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS);
/* WaPipelineFlushCoherentLines:icl */
I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) |
GEN8_LQSC_FLUSH_COHERENT_LINES);
/* Wa_1405543622:icl
* Formerly known as WaGAPZPriorityScheme
*/
I915_WRITE(GEN8_GARBCNTL, I915_READ(GEN8_GARBCNTL) |
GEN11_ARBITRATION_PRIO_ORDER_MASK);
/* Wa_1604223664:icl
* Formerly known as WaL3BankAddressHashing
*/
I915_WRITE(GEN8_GARBCNTL,
(I915_READ(GEN8_GARBCNTL) & ~GEN11_HASH_CTRL_EXCL_MASK) |
GEN11_HASH_CTRL_EXCL_BIT0);
I915_WRITE(GEN11_GLBLINVL,
(I915_READ(GEN11_GLBLINVL) & ~GEN11_BANK_HASH_ADDR_EXCL_MASK) |
GEN11_BANK_HASH_ADDR_EXCL_BIT0);
/* WaModifyGamTlbPartitioning:icl */
I915_WRITE(GEN11_GACB_PERF_CTRL,
(I915_READ(GEN11_GACB_PERF_CTRL) & ~GEN11_HASH_CTRL_MASK) |
GEN11_HASH_CTRL_BIT0 | GEN11_HASH_CTRL_BIT4);
/* Wa_1405733216:icl
* Formerly known as WaDisableCleanEvicts
*/
I915_WRITE(GEN8_L3SQCREG4, I915_READ(GEN8_L3SQCREG4) |
GEN11_LQSC_CLEAN_EVICT_DISABLE);
/* Wa_1405766107:icl
* Formerly known as WaCL2SFHalfMaxAlloc
*/
I915_WRITE(GEN11_LSN_UNSLCVC, I915_READ(GEN11_LSN_UNSLCVC) |
GEN11_LSN_UNSLCVC_GAFS_HALF_SF_MAXALLOC |
GEN11_LSN_UNSLCVC_GAFS_HALF_CL2_MAXALLOC);
/* Wa_220166154:icl
* Formerly known as WaDisCtxReload
*/
I915_WRITE(GAMW_ECO_DEV_RW_IA_REG, I915_READ(GAMW_ECO_DEV_RW_IA_REG) |
GAMW_ECO_DEV_CTX_RELOAD_DISABLE);
/* Wa_1405779004:icl (pre-prod) */
if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_A0))
I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE,
I915_READ(SLICE_UNIT_LEVEL_CLKGATE) |
MSCUNIT_CLKGATE_DIS);
/* Wa_1406680159:icl */
I915_WRITE(SUBSLICE_UNIT_LEVEL_CLKGATE,
I915_READ(SUBSLICE_UNIT_LEVEL_CLKGATE) |
GWUNIT_CLKGATE_DIS);
/* Wa_1604302699:icl */
I915_WRITE(GEN10_L3_CHICKEN_MODE_REGISTER,
I915_READ(GEN10_L3_CHICKEN_MODE_REGISTER) |
GEN11_I2M_WRITE_DISABLE);
/* Wa_1406838659:icl (pre-prod) */
if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_B0))
I915_WRITE(INF_UNIT_LEVEL_CLKGATE,
I915_READ(INF_UNIT_LEVEL_CLKGATE) |
CGPSF_CLKGATE_DIS);
/* WaForwardProgressSoftReset:icl */
I915_WRITE(GEN10_SCRATCH_LNCF2,
I915_READ(GEN10_SCRATCH_LNCF2) |
PMFLUSHDONE_LNICRSDROP |
PMFLUSH_GAPL3UNBLOCK |
PMFLUSHDONE_LNEBLK);
/* Wa_1406463099:icl
* Formerly known as WaGamTlbPendError
*/
I915_WRITE(GAMT_CHKN_BIT_REG,
I915_READ(GAMT_CHKN_BIT_REG) |
GAMT_CHKN_DISABLE_L3_COH_PIPE);
/* Wa_1406609255:icl (pre-prod) */
if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_B0))
I915_WRITE(GEN7_SARCHKMD,
I915_READ(GEN7_SARCHKMD) |
GEN7_DISABLE_DEMAND_PREFETCH |
GEN7_DISABLE_SAMPLER_PREFETCH);
}
void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)
{
if (INTEL_GEN(dev_priv) < 8)
return;
else if (IS_BROADWELL(dev_priv))
bdw_gt_workarounds_apply(dev_priv);
else if (IS_CHERRYVIEW(dev_priv))
chv_gt_workarounds_apply(dev_priv);
else if (IS_SKYLAKE(dev_priv))
skl_gt_workarounds_apply(dev_priv);
else if (IS_BROXTON(dev_priv))
bxt_gt_workarounds_apply(dev_priv);
else if (IS_KABYLAKE(dev_priv))
kbl_gt_workarounds_apply(dev_priv);
else if (IS_GEMINILAKE(dev_priv))
glk_gt_workarounds_apply(dev_priv);
else if (IS_COFFEELAKE(dev_priv))
cfl_gt_workarounds_apply(dev_priv);
else if (IS_CANNONLAKE(dev_priv))
cnl_gt_workarounds_apply(dev_priv);
else if (IS_ICELAKE(dev_priv))
icl_gt_workarounds_apply(dev_priv);
else
MISSING_CASE(INTEL_GEN(dev_priv));
}
struct whitelist {
i915_reg_t reg[RING_MAX_NONPRIV_SLOTS];
unsigned int count;
u32 nopid;
};
static void whitelist_reg(struct whitelist *w, i915_reg_t reg)
{
if (GEM_WARN_ON(w->count >= RING_MAX_NONPRIV_SLOTS))
return;
w->reg[w->count++] = reg;
}
static void bdw_whitelist_build(struct whitelist *w)
{
}
static void chv_whitelist_build(struct whitelist *w)
{
}
static void gen9_whitelist_build(struct whitelist *w)
{
/* WaVFEStateAfterPipeControlwithMediaStateClear:skl,bxt,glk,cfl */
whitelist_reg(w, GEN9_CTX_PREEMPT_REG);
/* WaEnablePreemptionGranularityControlByUMD:skl,bxt,kbl,cfl,[cnl] */
whitelist_reg(w, GEN8_CS_CHICKEN1);
/* WaAllowUMDToModifyHDCChicken1:skl,bxt,kbl,glk,cfl */
whitelist_reg(w, GEN8_HDC_CHICKEN1);
}
static void skl_whitelist_build(struct whitelist *w)
{
gen9_whitelist_build(w);
/* WaDisableLSQCROPERFforOCL:skl */
whitelist_reg(w, GEN8_L3SQCREG4);
}
static void bxt_whitelist_build(struct whitelist *w)
{
gen9_whitelist_build(w);
}
static void kbl_whitelist_build(struct whitelist *w)
{
gen9_whitelist_build(w);
/* WaDisableLSQCROPERFforOCL:kbl */
whitelist_reg(w, GEN8_L3SQCREG4);
}
static void glk_whitelist_build(struct whitelist *w)
{
gen9_whitelist_build(w);
/* WA #0862: Userspace has to set "Barrier Mode" to avoid hangs. */
whitelist_reg(w, GEN9_SLICE_COMMON_ECO_CHICKEN1);
}
static void cfl_whitelist_build(struct whitelist *w)
{
gen9_whitelist_build(w);
}
static void cnl_whitelist_build(struct whitelist *w)
{
/* WaEnablePreemptionGranularityControlByUMD:cnl */
whitelist_reg(w, GEN8_CS_CHICKEN1);
}
static void icl_whitelist_build(struct whitelist *w)
{
}
static struct whitelist *whitelist_build(struct intel_engine_cs *engine,
struct whitelist *w)
{
struct drm_i915_private *i915 = engine->i915;
GEM_BUG_ON(engine->id != RCS);
w->count = 0;
w->nopid = i915_mmio_reg_offset(RING_NOPID(engine->mmio_base));
if (INTEL_GEN(i915) < 8)
return NULL;
else if (IS_BROADWELL(i915))
bdw_whitelist_build(w);
else if (IS_CHERRYVIEW(i915))
chv_whitelist_build(w);
else if (IS_SKYLAKE(i915))
skl_whitelist_build(w);
else if (IS_BROXTON(i915))
bxt_whitelist_build(w);
else if (IS_KABYLAKE(i915))
kbl_whitelist_build(w);
else if (IS_GEMINILAKE(i915))
glk_whitelist_build(w);
else if (IS_COFFEELAKE(i915))
cfl_whitelist_build(w);
else if (IS_CANNONLAKE(i915))
cnl_whitelist_build(w);
else if (IS_ICELAKE(i915))
icl_whitelist_build(w);
else
MISSING_CASE(INTEL_GEN(i915));
return w;
}
static void whitelist_apply(struct intel_engine_cs *engine,
const struct whitelist *w)
{
struct drm_i915_private *dev_priv = engine->i915;
const u32 base = engine->mmio_base;
unsigned int i;
if (!w)
return;
intel_uncore_forcewake_get(engine->i915, FORCEWAKE_ALL);
for (i = 0; i < w->count; i++)
I915_WRITE_FW(RING_FORCE_TO_NONPRIV(base, i),
i915_mmio_reg_offset(w->reg[i]));
/* And clear the rest just in case of garbage */
for (; i < RING_MAX_NONPRIV_SLOTS; i++)
I915_WRITE_FW(RING_FORCE_TO_NONPRIV(base, i), w->nopid);
intel_uncore_forcewake_put(engine->i915, FORCEWAKE_ALL);
}
void intel_whitelist_workarounds_apply(struct intel_engine_cs *engine)
{
struct whitelist w;
whitelist_apply(engine, whitelist_build(engine, &w));
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/intel_workarounds.c"
#endif
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