[Intel-gfx] [PATCH] drm/i915/gen12: Add aux table invalidate for all engines
Daniele Ceraolo Spurio
daniele.ceraolospurio at intel.com
Thu May 7 21:32:12 UTC 2020
On 5/7/20 7:20 AM, Mika Kuoppala wrote:
> All engines, exception being blitter as it does not
> care about the form, can access compressed surfaces.
>
> So we need to add forced aux table invalidates
> for those engines.
>
> v2: virtual instance masking (Chris)
> v3: bug on if not found (Chris)
>
> References: d248b371f747 ("drm/i915/gen12: Invalidate aux table entries forcibly")
> References bspec#43904, hsdes#1809175790
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Chuansheng Liu <chuansheng.liu at intel.com>
> Cc: Rafael Antognolli <rafael.antognolli at intel.com>
> Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> ---
> drivers/gpu/drm/i915/gt/intel_lrc.c | 86 +++++++++++++++++++++++++++--
> drivers/gpu/drm/i915/i915_reg.h | 6 ++
> 2 files changed, 87 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
> index bbdb0e2a4571..e12916e2799b 100644
> --- a/drivers/gpu/drm/i915/gt/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
> @@ -4539,11 +4539,36 @@ static u32 preparser_disable(bool state)
> return MI_ARB_CHECK | 1 << 8 | state;
> }
>
> +static i915_reg_t aux_inv_reg(const struct intel_engine_cs *engine)
> +{
> + static const i915_reg_t vd[] = {
> + GEN12_VD0_AUX_NV,
> + GEN12_VD1_AUX_NV,
> + GEN12_VD2_AUX_NV,
> + GEN12_VD3_AUX_NV,
> + };
> +
> + static const i915_reg_t ve[] = {
> + GEN12_VE0_AUX_NV,
> + GEN12_VE1_AUX_NV,
> + };
> +
> + if (engine->class == VIDEO_DECODE_CLASS)
> + return vd[engine->instance];
> +
> + if (engine->class == VIDEO_ENHANCEMENT_CLASS)
> + return ve[engine->instance];
> +
> + GEM_BUG_ON("unknown aux_inv_reg\n");
> +
> + return INVALID_MMIO_REG;
> +}
> +
> static u32 *
> -gen12_emit_aux_table_inv(struct i915_request *rq, u32 *cs)
> +gen12_emit_aux_table_inv(const i915_reg_t inv_reg, u32 *cs)
> {
> *cs++ = MI_LOAD_REGISTER_IMM(1);
> - *cs++ = i915_mmio_reg_offset(GEN12_GFX_CCS_AUX_NV);
> + *cs++ = i915_mmio_reg_offset(inv_reg);
> *cs++ = AUX_INV;
> *cs++ = MI_NOOP;
>
> @@ -4612,7 +4637,7 @@ static int gen12_emit_flush_render(struct i915_request *request,
> cs = gen8_emit_pipe_control(cs, flags, LRC_PPHWSP_SCRATCH_ADDR);
>
> /* hsdes: 1809175790 */
> - cs = gen12_emit_aux_table_inv(request, cs);
> + cs = gen12_emit_aux_table_inv(GEN12_GFX_CCS_AUX_NV, cs);
>
> *cs++ = preparser_disable(false);
> intel_ring_advance(request, cs);
> @@ -4621,6 +4646,56 @@ static int gen12_emit_flush_render(struct i915_request *request,
> return 0;
> }
>
> +static int gen12_emit_flush(struct i915_request *request, u32 mode)
> +{
> + intel_engine_mask_t aux_inv = 0;
> + u32 cmd, *cs;
> +
> + if (mode & EMIT_INVALIDATE)
> + aux_inv = request->engine->mask & ~BIT(BCS0);
> +
> + cs = intel_ring_begin(request,
> + 4 + (aux_inv ? 2 * hweight8(aux_inv) + 2 : 0));
> + if (IS_ERR(cs))
> + return PTR_ERR(cs);
> +
> + cmd = MI_FLUSH_DW + 1;
> +
> + /* We always require a command barrier so that subsequent
> + * commands, such as breadcrumb interrupts, are strictly ordered
> + * wrt the contents of the write cache being flushed to memory
> + * (and thus being coherent from the CPU).
> + */
> + cmd |= MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
> +
> + if (mode & EMIT_INVALIDATE) {
> + cmd |= MI_INVALIDATE_TLB;
> + if (request->engine->class == VIDEO_DECODE_CLASS)
> + cmd |= MI_INVALIDATE_BSD;
> + }
> +
> + *cs++ = cmd;
> + *cs++ = LRC_PPHWSP_SCRATCH_ADDR;
> + *cs++ = 0; /* upper addr */
> + *cs++ = 0; /* value */
> +
> + if (aux_inv) { /* hsdes: 1809175790 */
> + struct intel_engine_cs *engine;
> + unsigned int tmp;
> +
> + *cs++ = MI_LOAD_REGISTER_IMM(hweight8(aux_inv));
> + for_each_engine_masked(engine, request->engine->gt,
> + aux_inv, tmp) {
> + *cs++ = i915_mmio_reg_offset(aux_inv_reg(engine));
> + *cs++ = AUX_INV;
Why do we loop through all engines? AFAICS the WA just says to
invalidate the current one. If it is because we don't know what we're
running on, can't we just use the automatic mmio remap on the CS? That
was added on purpose for per-engine registers that are not relative to
the mmio base (see bspec 45606)
Daniele
> + }
> + *cs++ = MI_NOOP;
> + }
> + intel_ring_advance(request, cs);
> +
> + return 0;
> +}
> +
> /*
> * Reserve space for 2 NOOPs at the end of each request to be
> * used as a workaround for not being allowed to do lite
> @@ -4854,9 +4929,10 @@ logical_ring_default_vfuncs(struct intel_engine_cs *engine)
> engine->emit_flush = gen8_emit_flush;
> engine->emit_init_breadcrumb = gen8_emit_init_breadcrumb;
> engine->emit_fini_breadcrumb = gen8_emit_fini_breadcrumb;
> - if (INTEL_GEN(engine->i915) >= 12)
> + if (INTEL_GEN(engine->i915) >= 12) {
> engine->emit_fini_breadcrumb = gen12_emit_fini_breadcrumb;
> -
> + engine->emit_flush = gen12_emit_flush;
> + }
> engine->set_default_submission = intel_execlists_set_default_submission;
>
> if (INTEL_GEN(engine->i915) < 11) {
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index dc5952200a07..6c076a24eb82 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -2558,6 +2558,12 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
> #define GEN12_PAT_INDEX(index) _MMIO(0x4800 + (index) * 4)
> #define BSD_HWS_PGA_GEN7 _MMIO(0x04180)
> #define GEN12_GFX_CCS_AUX_NV _MMIO(0x4208)
> +#define GEN12_VD0_AUX_NV _MMIO(0x4218)
> +#define GEN12_VD1_AUX_NV _MMIO(0x4228)
> +#define GEN12_VD2_AUX_NV _MMIO(0x4298)
> +#define GEN12_VD3_AUX_NV _MMIO(0x42A8)
> +#define GEN12_VE0_AUX_NV _MMIO(0x4238)
> +#define GEN12_VE1_AUX_NV _MMIO(0x42B8)
> #define AUX_INV REG_BIT(0)
> #define BLT_HWS_PGA_GEN7 _MMIO(0x04280)
> #define VEBOX_HWS_PGA_GEN7 _MMIO(0x04380)
>
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