[Intel-gfx] [PATCH 07/13] drm/i915: Eliminate Gen9 special case

[Chris Wilson]

On Thu, Sep 29, 2016 at 04:35:50PM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> If we insert blitter forcewake domain entries in the range
> table we can eliminate that special case and simplify the
> code in a few macros. This will enable more unification later.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_uncore.c | 42 ++++++++++++++++++-------------------
>  1 file changed, 21 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index ae5edaea16f7..a41a6a2019be 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -614,7 +614,7 @@ find_fw_domain(u32 offset, const struct intel_forcewake_range *ranges,
>  			num_ranges, sizeof(struct intel_forcewake_range),
>  			fw_range_cmp);
>  
> -	return entry ? entry->domains : -1;
> +	return entry ? entry->domains : 0;
>  }
>  
>  static void
> @@ -651,12 +651,9 @@ static const struct intel_forcewake_range __vlv_fw_ranges[] = {
>  #define __vlv_reg_read_fw_domains(offset) \
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
> -	if (NEEDS_FORCE_WAKE((offset))) { \
> +	if (NEEDS_FORCE_WAKE((offset))) \
>  		__fwd = find_fw_domain(offset, __vlv_fw_ranges, \
>  				       ARRAY_SIZE(__vlv_fw_ranges)); \
> -		if (__fwd == -1 ) \
> -			__fwd = 0; \
> -	} \
>  	__fwd; \
>  })
>  
> @@ -713,57 +710,63 @@ static const struct intel_forcewake_range __chv_fw_ranges[] = {
>  #define __chv_reg_read_fw_domains(offset) \
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
> -	if (NEEDS_FORCE_WAKE((offset))) { \
> +	if (NEEDS_FORCE_WAKE((offset))) \
>  		__fwd = find_fw_domain(offset, __chv_fw_ranges, \
>  				       ARRAY_SIZE(__chv_fw_ranges)); \
> -		if (__fwd == -1 ) \
> -			__fwd = 0; \
> -	} \
>  	__fwd; \
>  })
>  
>  #define __chv_reg_write_fw_domains(offset) \
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
> -	if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) { \
> +	if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
>  		__fwd = find_fw_domain(offset, __chv_fw_ranges, \
>  				       ARRAY_SIZE(__chv_fw_ranges)); \
> -		if (__fwd == -1 ) \
> -			__fwd = 0; \
> -	} \
>  	__fwd; \
>  })
>  
>  /* *Must* be sorted by offset ranges! */
>  static const struct intel_forcewake_range __gen9_fw_ranges[] = {
> +	GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
>  	GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA),
>  	GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA),
> +	GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
> +	GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0xb480, 0xbfff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
> +	GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
> +	GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA),
> +	GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
> +	GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_BLITTER),
>  	GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
>  };
>  
>  #define __gen9_reg_read_fw_domains(offset) \
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
> -	if (NEEDS_FORCE_WAKE((offset))) { \
> +	if (NEEDS_FORCE_WAKE((offset))) \
>  		__fwd = find_fw_domain(offset, __gen9_fw_ranges, \
>  				       ARRAY_SIZE(__gen9_fw_ranges)); \
> -		if (__fwd == -1 ) \
> -			__fwd = FORCEWAKE_BLITTER; \

Hmm. Leaving the holes halves the table size, and saves approximately
one pass... :|

Being explicit in the declaration is better, so lgtm.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre