[Intel-gfx] [PATCH 1/6] drm/i915/uncore: Convert gen6/gen7 read operations to fwtable

[Tvrtko Ursulin]

On 10/09/2021 06:33, Matt Roper wrote:
> On gen6-gen8 (except vlv/chv) we don't use a forcewake lookup table; we
> simply check whether the register offset is < 0x40000, and return
> FORCEWAKE_RENDER if it is.  To prepare for upcoming refactoring, let's
> define a single-entry forcewake table from [0x0, 0x3ffff] and switch
> these platforms over to use the fwtable reader functions.
> 
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> ---
>   drivers/gpu/drm/i915/intel_uncore.c | 11 ++++++++---
>   1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index f9767054dbdf..7f92f12d95f2 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -1064,6 +1064,10 @@ gen6_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg)
>   	__fwd; \
>   })
>   

Is __gen6_reg_read_fw_domains left orphaned somewhere around here or in 
a later patch?

Regards,

Tvrtko

> +static const struct intel_forcewake_range __gen6_fw_ranges[] = {
> +	GEN_FW_RANGE(0x0, 0x3ffff, FORCEWAKE_RENDER),
> +};
> +
>   /* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
>   static const struct intel_forcewake_range __chv_fw_ranges[] = {
>   	GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
> @@ -1623,7 +1627,6 @@ __gen_read(func, 64)
>   
>   __gen_reg_read_funcs(gen11_fwtable);
>   __gen_reg_read_funcs(fwtable);
> -__gen_reg_read_funcs(gen6);
>   
>   #undef __gen_reg_read_funcs
>   #undef GEN6_READ_FOOTER
> @@ -2111,15 +2114,17 @@ static int uncore_forcewake_init(struct intel_uncore *uncore)
>   		ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
>   		ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
>   	} else if (GRAPHICS_VER(i915) == 8) {
> +		ASSIGN_FW_DOMAINS_TABLE(uncore, __gen6_fw_ranges);
>   		ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen8);
> -		ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
> +		ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
>   	} else if (IS_VALLEYVIEW(i915)) {
>   		ASSIGN_FW_DOMAINS_TABLE(uncore, __vlv_fw_ranges);
>   		ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
>   		ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
>   	} else if (IS_GRAPHICS_VER(i915, 6, 7)) {
> +		ASSIGN_FW_DOMAINS_TABLE(uncore, __gen6_fw_ranges);
>   		ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
> -		ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
> +		ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
>   	}
>   
>   	uncore->pmic_bus_access_nb.notifier_call = i915_pmic_bus_access_notifier;
>