[Mesa-dev] [PATCH 08/13] anv: Implement the basic form of VK_EXT_transform_feedback

[Lionel Landwerlin]

On 13/10/2018 14:09, Jason Ekstrand wrote:
> ---
>   src/intel/vulkan/anv_cmd_buffer.c  |  29 +++++++
>   src/intel/vulkan/anv_device.c      |  24 ++++++
>   src/intel/vulkan/anv_extensions.py |   2 +-
>   src/intel/vulkan/anv_pipeline.c    |  10 ++-
>   src/intel/vulkan/anv_private.h     |  13 +++
>   src/intel/vulkan/genX_cmd_buffer.c | 125 +++++++++++++++++++++++++++++
>   src/intel/vulkan/genX_pipeline.c   | 122 ++++++++++++++++++++++++++++
>   7 files changed, 323 insertions(+), 2 deletions(-)
>

...


> +
> +      int max_decls = 0;
> +      for (unsigned s = 0; s < MAX_XFB_STREAMS; s++)
> +         max_decls = MAX2(max_decls, decls[s]);
> +
> +      uint8_t sbs[MAX_XFB_STREAMS] = { };
> +      for (unsigned b = 0; b < MAX_XFB_BUFFERS; b++) {
> +         if (xfb_info->buffers_written & (1 << b))
> +            sbs[xfb_info->buffer_to_stream[b]] |= 1 << b;
> +      }
> +
> +      uint32_t *dw = anv_batch_emitn(&pipeline->batch, 3 + 2 * max_decls,
> +                                     GENX(3DSTATE_SO_DECL_LIST),
> +                                     .StreamtoBufferSelects0 = sbs[0],
> +                                     .StreamtoBufferSelects1 = sbs[1],
> +                                     .StreamtoBufferSelects2 = sbs[2],
> +                                     .StreamtoBufferSelects3 = sbs[3],
> +                                     .NumEntries0 = decls[0],
> +                                     .NumEntries1 = decls[1],
> +                                     .NumEntries2 = decls[2],
> +                                     .NumEntries3 = decls[3]);
> +
> +      for (int i = 0; i < max_decls; i++) {
> +         GENX(SO_DECL_ENTRY_pack)(NULL, dw + 3 + i * 2,
> +            &(struct GENX(SO_DECL_ENTRY)) {
> +               .Stream0Decl = so_decl[0][i],
> +               .Stream1Decl = so_decl[1][i],
> +               .Stream2Decl = so_decl[2][i],
> +               .Stream3Decl = so_decl[3][i],
> +            });
> +      }


Documentation of 3DSTATE_SO_DECL_LIST Gen10+ says :

"

This command must be followed by a PIPE_CONTROL with CS Stall bit set.,
"


>      }
> +#endif /* GEN_GEN >= 8 */
>   }
>   
>   static uint32_t


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