[Intel-gfx] [PATCH 08/13] drm/i915: Store the active forcewake range table pointer

[Chris Wilson]

On Thu, Sep 29, 2016 at 04:35:51PM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> If we store this in the uncore structure we are on a good way to
> show more commonality between the per-platform implementations.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h     | 11 ++++++
>  drivers/gpu/drm/i915/intel_uncore.c | 74 ++++++++++++++++++-------------------
>  2 files changed, 47 insertions(+), 38 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 4cd727376d1d..7c8bd07767fe 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -582,9 +582,20 @@ struct intel_uncore_funcs {
>  				uint32_t val, bool trace);
>  };
>  
> +struct intel_forcewake_range
> +{

struct intel_forcewake_range {

> +	u32 start;
> +	u32 end;
> +
> +	enum forcewake_domains domains;
> +};
> +
>  struct intel_uncore {
>  	spinlock_t lock; /** lock is also taken in irq contexts. */
>  
> +	struct intel_forcewake_range *fw_domains_table;
> +	unsigned int fw_domains_table_entries;

constify?

> +
>  	struct intel_uncore_funcs funcs;
>  
>  	unsigned fifo_count;
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index a41a6a2019be..2197c0a43dda 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -582,14 +582,6 @@ void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
>  	__fwd; \
>  })
>  
> -struct intel_forcewake_range
> -{
> -	u32 start;
> -	u32 end;
> -
> -	enum forcewake_domains domains;
> -};
> -
>  static int fw_range_cmp(const void *key, const void *elt)
>  {
>  	struct intel_forcewake_range *entry =
> @@ -605,28 +597,36 @@ static int fw_range_cmp(const void *key, const void *elt)
>  }
>  
>  static enum forcewake_domains
> -find_fw_domain(u32 offset, const struct intel_forcewake_range *ranges,
> -	       unsigned int num_ranges)
> +find_fw_domain(struct drm_i915_private *dev_priv, u32 offset)
>  {
> -	struct intel_forcewake_range *entry;
> +	struct intel_forcewake_range *table, *entry;
> +	unsigned int num_entries;
>  
> -	entry = bsearch((void *)(unsigned long)offset, (const void *)ranges,
> -			num_ranges, sizeof(struct intel_forcewake_range),
> +	table = dev_priv->uncore.fw_domains_table;
> +	num_entries = dev_priv->uncore.fw_domains_table_entries;
> +
> +	entry = bsearch((void *)(unsigned long)offset, (const void *)table,
> +			num_entries, sizeof(struct intel_forcewake_range),
>  			fw_range_cmp);
>  
>  	return entry ? entry->domains : 0;
>  }
>  
>  static void
> -intel_fw_table_check(const struct intel_forcewake_range *ranges,
> -		     unsigned int num_ranges)
> +intel_fw_table_check(struct drm_i915_private *dev_priv)
>  {
>  	unsigned int i;
> -	struct intel_forcewake_range *entry =
> -		(struct intel_forcewake_range *)ranges;
> -	s32 prev = -1;
> +	struct intel_forcewake_range *entry;
> +	unsigned int num_ranges;
> +	s32 prev;
>  
> -	for (i = 0; i < num_ranges; i++, entry++) {
> +	entry = dev_priv->uncore.fw_domains_table;
> +	if (!entry)
> +		return;
> +
> +	num_ranges = dev_priv->uncore.fw_domains_table_entries;
> +
> +	for (i = 0, prev = -1; i < num_ranges; i++, entry++) {
>  		WARN_ON_ONCE(prev >= (s32)entry->start);
>  		prev = entry->start;
>  		WARN_ON_ONCE(prev >= (s32)entry->end);
> @@ -652,8 +652,7 @@ static const struct intel_forcewake_range __vlv_fw_ranges[] = {
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
>  	if (NEEDS_FORCE_WAKE((offset))) \
> -		__fwd = find_fw_domain(offset, __vlv_fw_ranges, \
> -				       ARRAY_SIZE(__vlv_fw_ranges)); \
> +		__fwd = find_fw_domain(dev_priv, offset); \
>  	__fwd; \
>  })
>  
> @@ -711,8 +710,7 @@ static const struct intel_forcewake_range __chv_fw_ranges[] = {
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
>  	if (NEEDS_FORCE_WAKE((offset))) \
> -		__fwd = find_fw_domain(offset, __chv_fw_ranges, \
> -				       ARRAY_SIZE(__chv_fw_ranges)); \
> +		__fwd = find_fw_domain(dev_priv, offset); \
>  	__fwd; \
>  })
>  
> @@ -720,8 +718,7 @@ static const struct intel_forcewake_range __chv_fw_ranges[] = {
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
>  	if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
> -		__fwd = find_fw_domain(offset, __chv_fw_ranges, \
> -				       ARRAY_SIZE(__chv_fw_ranges)); \
> +		__fwd = find_fw_domain(dev_priv, offset); \
>  	__fwd; \
>  })
>  
> @@ -765,8 +762,7 @@ static const struct intel_forcewake_range __gen9_fw_ranges[] = {
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
>  	if (NEEDS_FORCE_WAKE((offset))) \
> -		__fwd = find_fw_domain(offset, __gen9_fw_ranges, \
> -				       ARRAY_SIZE(__gen9_fw_ranges)); \
> +		__fwd = find_fw_domain(dev_priv, offset); \
>  	__fwd; \
>  })
>  
> @@ -794,8 +790,7 @@ static bool is_gen9_shadowed(u32 offset)
>  ({ \
>  	enum forcewake_domains __fwd = 0; \
>  	if (NEEDS_FORCE_WAKE((offset)) && !is_gen9_shadowed(offset)) \
> -		__fwd = find_fw_domain(offset, __gen9_fw_ranges, \
> -				       ARRAY_SIZE(__gen9_fw_ranges)); \
> +		__fwd = find_fw_domain(dev_priv, offset); \
>  	__fwd; \
>  })
>  
> @@ -1318,6 +1313,13 @@ static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv)
>  	WARN_ON(dev_priv->uncore.fw_domains == 0);
>  }
>  
> +#define ASSIGN_FW_DOMAINS_TABLE(d) \
> +{ \
> +	dev_priv->uncore.fw_domains_table = \
> +			(struct intel_forcewake_range *)(d); \
> +	dev_priv->uncore.fw_domains_table_entries = ARRAY_SIZE((d)); \
> +}
> +
>  void intel_uncore_init(struct drm_i915_private *dev_priv)
>  {
>  	i915_check_vgpu(dev_priv);
> @@ -1331,17 +1333,13 @@ void intel_uncore_init(struct drm_i915_private *dev_priv)
>  	switch (INTEL_INFO(dev_priv)->gen) {
>  	default:
>  	case 9:
> -		intel_fw_table_check(__gen9_fw_ranges,
> -				     ARRAY_SIZE(__gen9_fw_ranges));
> -
> +		ASSIGN_FW_DOMAINS_TABLE(__gen9_fw_ranges);
>  		ASSIGN_WRITE_MMIO_VFUNCS(gen9);
>  		ASSIGN_READ_MMIO_VFUNCS(gen9);
>  		break;
>  	case 8:
>  		if (IS_CHERRYVIEW(dev_priv)) {
> -			intel_fw_table_check(__chv_fw_ranges,
> -					     ARRAY_SIZE(__chv_fw_ranges));
> -
> +			ASSIGN_FW_DOMAINS_TABLE(__chv_fw_ranges);
>  			ASSIGN_WRITE_MMIO_VFUNCS(chv);
>  			ASSIGN_READ_MMIO_VFUNCS(chv);
>  
> @@ -1355,9 +1353,7 @@ void intel_uncore_init(struct drm_i915_private *dev_priv)
>  		ASSIGN_WRITE_MMIO_VFUNCS(gen6);
>  
>  		if (IS_VALLEYVIEW(dev_priv)) {
> -			intel_fw_table_check(__vlv_fw_ranges,
> -					     ARRAY_SIZE(__vlv_fw_ranges));
> -
> +			ASSIGN_FW_DOMAINS_TABLE(__vlv_fw_ranges);
>  			ASSIGN_READ_MMIO_VFUNCS(vlv);
>  		} else {
>  			ASSIGN_READ_MMIO_VFUNCS(gen6);
> @@ -1375,6 +1371,8 @@ void intel_uncore_init(struct drm_i915_private *dev_priv)
>  		break;
>  	}
>  
> +	intel_fw_table_check(dev_priv);

Looking better...
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre