[Mesa-dev] [PATCH 2/5] i965/icl: Set use full ways in L3CNTLREG

[Kenneth Graunke]

On Tuesday, November 13, 2018 2:33:59 PM PST Anuj Phogat wrote:
> L3 allocation table in h/w specification recommends using 4 KB
> granularity for programming allocation fields in L3CNTLREG.
> 
> Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
> Cc: Kenneth Graunke <kenneth at whitecape.org>
> Cc: Francisco Jerez <currojerez at riseup.net>
> Cc: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> ---
>  src/mesa/drivers/dri/i965/brw_defines.h   | 1 +
>  src/mesa/drivers/dri/i965/gen7_l3_state.c | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h
> index 897c91aa31e..b8ada02d6eb 100644
> --- a/src/mesa/drivers/dri/i965/brw_defines.h
> +++ b/src/mesa/drivers/dri/i965/brw_defines.h
> @@ -1647,6 +1647,7 @@ enum brw_pixel_shader_coverage_mask_mode {
>  # define GEN8_L3CNTLREG_ALL_ALLOC_SHIFT    25
>  # define GEN8_L3CNTLREG_ALL_ALLOC_MASK     INTEL_MASK(31, 25)
>  # define GEN8_L3CNTLREG_EDBC_NO_HANG       (1 << 9)
> +# define GEN8_L3CNTLREG_USE_FULL_WAYS      (1 << 10)
>  
>  #define GEN10_CACHE_MODE_SS            0x0e420
>  #define GEN10_FLOAT_BLEND_OPTIMIZATION_ENABLE (1 << 4)
> diff --git a/src/mesa/drivers/dri/i965/gen7_l3_state.c b/src/mesa/drivers/dri/i965/gen7_l3_state.c
> index 8c6c4c47481..fb9b2703a50 100644
> --- a/src/mesa/drivers/dri/i965/gen7_l3_state.c
> +++ b/src/mesa/drivers/dri/i965/gen7_l3_state.c
> @@ -119,6 +119,7 @@ setup_l3_config(struct brw_context *brw, const struct gen_l3_config *cfg)
>        assert(!cfg->n[GEN_L3P_IS] && !cfg->n[GEN_L3P_C] && !cfg->n[GEN_L3P_T]);
>  
>        const unsigned imm_data = ((has_slm ? GEN8_L3CNTLREG_SLM_ENABLE : 0) |
> +         (devinfo->gen == 11 ? GEN8_L3CNTLREG_USE_FULL_WAYS : 0) |
>           SET_FIELD(cfg->n[GEN_L3P_URB], GEN8_L3CNTLREG_URB_ALLOC) |
>           SET_FIELD(cfg->n[GEN_L3P_RO], GEN8_L3CNTLREG_RO_ALLOC) |
>           SET_FIELD(cfg->n[GEN_L3P_DC], GEN8_L3CNTLREG_DC_ALLOC) |
> 

I agree that we ought to set this bit, in whatever solution we
ultimately come up with.
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