[Mesa-stable] [PATCH V2 1/4] i965/gen10: Implement WaSampleOffsetIZ workaround
Anuj Phogat
anuj.phogat at gmail.com
Mon Oct 23 15:46:26 UTC 2017
Ping. Patches 2-4 in this series are still waiting for review.
Anyone interested?
Thanks!
On Fri, Oct 13, 2017 at 3:35 PM, Rafael Antognolli
<rafael.antognolli at intel.com> wrote:
> Hi Anuj, sorry that I missed this patch. Please see below.
>
> On Fri, Oct 06, 2017 at 04:30:47PM -0700, Anuj Phogat wrote:
>> There are few other (duplicate) workarounds which have similar recommendations:
>> WaFlushHangWhenNonPipelineStateAndMarkerStalled
>> WaCSStallBefore3DSamplePattern
>> WaPipeControlBefore3DStateSamplePattern
>>
>> WaPipeControlBefore3DStateSamplePattern has some extra recommendations if
>> driver is using mid batch context restore. Ignoring it for now because We're
>> not doing mid-batch context restore in Mesa.
>>
>> Cc: mesa-stable at lists.freedesktop.org
>> Cc: Jason Ekstrand <jason at jlekstrand.net>
>> Cc: Rafael Antognolli <rafael.antognolli at intel.com>
>> Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
>> ---
>> src/mesa/drivers/dri/i965/brw_context.h | 2 +
>> src/mesa/drivers/dri/i965/brw_defines.h | 1 +
>> src/mesa/drivers/dri/i965/brw_pipe_control.c | 50 ++++++++++++++++++++++
>> src/mesa/drivers/dri/i965/gen8_multisample_state.c | 8 ++++
>> 4 files changed, 61 insertions(+)
>>
>> diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
>> index 92fc16de13..f0e8d562e9 100644
>> --- a/src/mesa/drivers/dri/i965/brw_context.h
>> +++ b/src/mesa/drivers/dri/i965/brw_context.h
>> @@ -1647,6 +1647,8 @@ void brw_emit_post_sync_nonzero_flush(struct brw_context *brw);
>> void brw_emit_depth_stall_flushes(struct brw_context *brw);
>> void gen7_emit_vs_workaround_flush(struct brw_context *brw);
>> void gen7_emit_cs_stall_flush(struct brw_context *brw);
>> +void gen10_emit_wa_cs_stall_flush(struct brw_context *brw);
>> +void gen10_emit_wa_lri_to_cache_mode_zero(struct brw_context *brw);
>>
>> /* brw_queryformat.c */
>> void brw_query_internal_format(struct gl_context *ctx, GLenum target,
>> diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h
>> index 4abb790612..270cdf29db 100644
>> --- a/src/mesa/drivers/dri/i965/brw_defines.h
>> +++ b/src/mesa/drivers/dri/i965/brw_defines.h
>> @@ -1609,6 +1609,7 @@ enum brw_pixel_shader_coverage_mask_mode {
>> #define GEN7_GPGPU_DISPATCHDIMY 0x2504
>> #define GEN7_GPGPU_DISPATCHDIMZ 0x2508
>>
>> +#define GEN7_CACHE_MODE_0 0x7000
>> #define GEN7_CACHE_MODE_1 0x7004
>> # define GEN9_FLOAT_BLEND_OPTIMIZATION_ENABLE (1 << 4)
>> # define GEN8_HIZ_NP_PMA_FIX_ENABLE (1 << 11)
>> diff --git a/src/mesa/drivers/dri/i965/brw_pipe_control.c b/src/mesa/drivers/dri/i965/brw_pipe_control.c
>> index 460b8f73b6..156f5c25ec 100644
>> --- a/src/mesa/drivers/dri/i965/brw_pipe_control.c
>> +++ b/src/mesa/drivers/dri/i965/brw_pipe_control.c
>> @@ -278,6 +278,56 @@ gen7_emit_cs_stall_flush(struct brw_context *brw)
>> brw->workaround_bo, 0, 0);
>> }
>>
>> +static void
>> +brw_flush_gpu_caches(struct brw_context *brw) {
>> + brw_emit_pipe_control_flush(brw,
>> + PIPE_CONTROL_CACHE_FLUSH_BITS |
>> + PIPE_CONTROL_CACHE_INVALIDATE_BITS);
>> +}
>
> This function is only calling another function without any extra logic, so I
> would just call brw_emit_pipe_control_flush() and remove this declaration. But
> that's just cosmetic.
>
> With or without this change, this patch correctly implements the workaround
> imho, so it is
>
> Reviewed-by: Rafael Antognolli <rafael.antognolli at intel.com>
>
>> +/**
>> + * From Gen10 Workarounds page in h/w specs:
>> + * WaSampleOffsetIZ:
>> + * Prior to the 3DSTATE_SAMPLE_PATTERN driver must ensure there are no
>> + * markers in the pipeline by programming a PIPE_CONTROL with stall.
>> + */
>> +void
>> +gen10_emit_wa_cs_stall_flush(struct brw_context *brw)
>> +{
>> + const struct gen_device_info *devinfo = &brw->screen->devinfo;
>> + assert(devinfo->gen == 10);
>> + brw_emit_pipe_control_flush(brw,
>> + PIPE_CONTROL_CS_STALL |
>> + PIPE_CONTROL_STALL_AT_SCOREBOARD);
>> +}
>> +
>> +/**
>> + * From Gen10 Workarounds page in h/w specs:
>> + * WaSampleOffsetIZ:
>> + * When 3DSTATE_SAMPLE_PATTERN is programmed, driver must then issue an
>> + * MI_LOAD_REGISTER_IMM command to an offset between 0x7000 and 0x7FFF(SVL)
>> + * after the command to ensure the state has been delivered prior to any
>> + * command causing a marker in the pipeline.
>> + */
>> +void
>> +gen10_emit_wa_lri_to_cache_mode_zero(struct brw_context *brw)
>> +{
>> + const struct gen_device_info *devinfo = &brw->screen->devinfo;
>> + assert(devinfo->gen == 10);
>> +
>> + /* Before changing the value of CACHE_MODE_0 register, GFX pipeline must
>> + * be idle; i.e., full flush is required.
>> + */
>> + brw_flush_gpu_caches(brw);
>> +
>> + /* Write to CACHE_MODE_0 (0x7000) */
>> + BEGIN_BATCH(3);
>> + OUT_BATCH(MI_LOAD_REGISTER_IMM | (3 - 2));
>> + OUT_BATCH(GEN7_CACHE_MODE_0);
>> + OUT_BATCH(0);
>> + ADVANCE_BATCH();
>> +}
>> +
>> /**
>> * Emits a PIPE_CONTROL with a non-zero post-sync operation, for
>> * implementing two workarounds on gen6. From section 1.4.7.1
>> diff --git a/src/mesa/drivers/dri/i965/gen8_multisample_state.c b/src/mesa/drivers/dri/i965/gen8_multisample_state.c
>> index 7a31a5df4a..14043025b6 100644
>> --- a/src/mesa/drivers/dri/i965/gen8_multisample_state.c
>> +++ b/src/mesa/drivers/dri/i965/gen8_multisample_state.c
>> @@ -49,6 +49,11 @@ gen8_emit_3dstate_multisample(struct brw_context *brw, unsigned num_samples)
>> void
>> gen8_emit_3dstate_sample_pattern(struct brw_context *brw)
>> {
>> + const struct gen_device_info *devinfo = &brw->screen->devinfo;
>> +
>> + if (devinfo->gen == 10)
>> + gen10_emit_wa_cs_stall_flush(brw);
>> +
>> BEGIN_BATCH(9);
>> OUT_BATCH(_3DSTATE_SAMPLE_PATTERN << 16 | (9 - 2));
>>
>> @@ -68,4 +73,7 @@ gen8_emit_3dstate_sample_pattern(struct brw_context *brw)
>> /* 1x and 2x MSAA */
>> OUT_BATCH(brw_multisample_positions_1x_2x);
>> ADVANCE_BATCH();
>> +
>> + if (devinfo->gen == 10)
>> + gen10_emit_wa_lri_to_cache_mode_zero(brw);
>> }
>> --
>> 2.13.5
>>
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