[PATCH i-g-t 08/15] lib/intel_blt: add emit batchbuffer end

[Francois Dugast]

On Tue, May 13, 2025 at 08:58:03PM +0200, Zbigniew Kempczyński wrote:
> Blitter functions allow emit BBE on demand. This gives the caller
> to combine different emit functions in single batch.
> 
> Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
> Cc: Francois Dugast <francois.dugast at intel.com>

Reviewed-by: Francois Dugast <francois.dugast at intel.com>

> ---
>  lib/intel_blt.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/intel_blt.c b/lib/intel_blt.c
> index 6bfaf09a2b..04549ab42e 100644
> --- a/lib/intel_blt.c
> +++ b/lib/intel_blt.c
> @@ -1820,7 +1820,9 @@ void blt_mem_copy_init(int fd, struct blt_mem_copy_data *mem,
>  	mem->copy_type = copy_type;
>  }
>  
> -static void emit_blt_mem_copy(int fd, uint64_t ahnd, const struct blt_mem_copy_data *mem)
> +static void emit_blt_mem_copy(int fd, uint64_t ahnd,
> +			      const struct blt_mem_copy_data *mem,
> +			      bool emit_bbe)
>  {
>  	uint64_t dst_offset, src_offset;
>  	int i;
> @@ -1846,7 +1848,9 @@ static void emit_blt_mem_copy(int fd, uint64_t ahnd, const struct blt_mem_copy_d
>  	batch[i++] = dst_offset;
>  	batch[i++] = dst_offset << 32;
>  	batch[i++] = mem->src.mocs_index << XE2_MEM_COPY_MOCS_SHIFT | mem->dst.mocs_index;
> -	batch[i++] = MI_BATCH_BUFFER_END;
> +
> +	if (emit_bbe)
> +		batch[i++] = MI_BATCH_BUFFER_END;
>  
>  	munmap(batch, mem->bb.size);
>  }
> @@ -1880,7 +1884,7 @@ int blt_mem_copy(int fd, const intel_ctx_t *ctx,
>  					  0, mem->dst.pat_index);
>  	bb_offset = get_offset(ahnd, mem->bb.handle, mem->bb.size, 0);
>  
> -	emit_blt_mem_copy(fd, ahnd, mem);
> +	emit_blt_mem_copy(fd, ahnd, mem, true);
>  
>  	if (mem->driver == INTEL_DRIVER_XE) {
>  		intel_ctx_xe_exec(ctx, ahnd, CANONICAL(bb_offset));
> -- 
> 2.43.0
>