Re: [PATCH 8/8] drm/i915: Enum forcewake domains and domain identifiers

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On Tue, 09 Dec 2014, Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx> wrote:
> Make the domains and domain identifiers enums. To emphasize
> the difference in order to avoid mistakes.
>
> Suggested-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/i915_drv.h     | 41 +++++++++++++++++----------------
>  drivers/gpu/drm/i915/intel_uncore.c | 45 +++++++++++++++++++------------------
>  2 files changed, 45 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 0d47397..5c6c372 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -533,11 +533,28 @@ struct drm_i915_display_funcs {
>  	void (*enable_backlight)(struct intel_connector *connector);
>  };
>  
> +enum fw_domain_id {

Does anyone else think of "firmware" first when seeing "fw", and
"forcewake" only after a moment?

Jani.


> +	FW_DOMAIN_ID_RENDER = 0,
> +	FW_DOMAIN_ID_BLITTER,
> +	FW_DOMAIN_ID_MEDIA,
> +
> +	FW_DOMAIN_ID_COUNT
> +};
> +
> +enum fw_domains {
> +	FORCEWAKE_RENDER = (1 << FW_DOMAIN_ID_RENDER),
> +	FORCEWAKE_BLITTER = (1 << FW_DOMAIN_ID_BLITTER),
> +	FORCEWAKE_MEDIA	= (1 << FW_DOMAIN_ID_MEDIA),
> +	FORCEWAKE_ALL = (FORCEWAKE_RENDER |
> +			 FORCEWAKE_BLITTER |
> +			 FORCEWAKE_MEDIA)
> +};
> +
>  struct intel_uncore_funcs {
>  	void (*force_wake_get)(struct drm_i915_private *dev_priv,
> -							int fw_engine);
> +							enum fw_domains domains);
>  	void (*force_wake_put)(struct drm_i915_private *dev_priv,
> -							int fw_engine);
> +							enum fw_domains domains);
>  
>  	uint8_t  (*mmio_readb)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
>  	uint16_t (*mmio_readw)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
> @@ -554,25 +571,17 @@ struct intel_uncore_funcs {
>  				uint64_t val, bool trace);
>  };
>  
> -enum {
> -	FW_DOMAIN_ID_RENDER = 0,
> -	FW_DOMAIN_ID_BLITTER,
> -	FW_DOMAIN_ID_MEDIA,
> -
> -	FW_DOMAIN_ID_COUNT
> -};
> -
>  struct intel_uncore {
>  	spinlock_t lock; /** lock is also taken in irq contexts. */
>  
>  	struct intel_uncore_funcs funcs;
>  
>  	unsigned fifo_count;
> -	unsigned fw_domains;
> +	enum fw_domains fw_domains;
>  
>  	struct intel_uncore_forcewake_domain {
>  		struct drm_i915_private *i915;
> -		int id;
> +		enum fw_domain_id id;
>  		unsigned wake_count;
>  		struct timer_list timer;
>  		u32 reg_set;
> @@ -582,12 +591,6 @@ struct intel_uncore {
>  		u32 reg_post;
>  		u32 val_reset;
>  	} fw_domain[FW_DOMAIN_ID_COUNT];
> -#define FORCEWAKE_RENDER	(1 << FW_DOMAIN_ID_RENDER)
> -#define FORCEWAKE_BLITTER	(1 << FW_DOMAIN_ID_BLITTER)
> -#define FORCEWAKE_MEDIA		(1 << FW_DOMAIN_ID_MEDIA)
> -#define FORCEWAKE_ALL		(FORCEWAKE_RENDER | \
> -				 FORCEWAKE_BLITTER | \
> -				 FORCEWAKE_MEDIA)
>  };
>  
>  /* Iterate over initialised fw domains */
> @@ -2449,7 +2452,7 @@ extern void intel_uncore_init(struct drm_device *dev);
>  extern void intel_uncore_check_errors(struct drm_device *dev);
>  extern void intel_uncore_fini(struct drm_device *dev);
>  extern void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore);
> -const char *intel_uncore_forcewake_domain_to_str(const int domain_id);
> +const char *intel_uncore_forcewake_domain_to_str(const enum fw_domain_id id);
>  void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
>  				unsigned fw_domains);
>  void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index 509b9c9..e802486 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -49,7 +49,7 @@ static const char * const forcewake_domain_names[] = {
>  };
>  
>  const char *
> -intel_uncore_forcewake_domain_to_str(const int id)
> +intel_uncore_forcewake_domain_to_str(const enum fw_domain_id id)
>  {
>  	BUILD_BUG_ON((sizeof(forcewake_domain_names)/sizeof(const char *)) !=
>  		     FW_DOMAIN_ID_COUNT);
> @@ -122,10 +122,10 @@ fw_domain_posting_read(const struct intel_uncore_forcewake_domain *d)
>  }
>  
>  static void
> -fw_domains_get(struct drm_i915_private *dev_priv, int fw_domains)
> +fw_domains_get(struct drm_i915_private *dev_priv, enum fw_domains fw_domains)
>  {
>  	struct intel_uncore_forcewake_domain *d;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	for_each_fw_domain_mask(d, fw_domains, dev_priv, id) {
>  		fw_domain_wait_ack_clear(d);
> @@ -136,10 +136,10 @@ fw_domains_get(struct drm_i915_private *dev_priv, int fw_domains)
>  }
>  
>  static void
> -fw_domains_put(struct drm_i915_private *dev_priv, int fw_domains)
> +fw_domains_put(struct drm_i915_private *dev_priv, enum fw_domains fw_domains)
>  {
>  	struct intel_uncore_forcewake_domain *d;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	for_each_fw_domain_mask(d, fw_domains, dev_priv, id)
>  		fw_domain_put(d);
> @@ -149,7 +149,7 @@ static void
>  fw_domains_posting_read(struct drm_i915_private *dev_priv)
>  {
>  	struct intel_uncore_forcewake_domain *d;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	/* No need to do for all, just do for first found */
>  	for_each_fw_domain(d, dev_priv, id) {
> @@ -159,10 +159,10 @@ fw_domains_posting_read(struct drm_i915_private *dev_priv)
>  }
>  
>  static void
> -fw_domains_reset(struct drm_i915_private *dev_priv, const unsigned fw_domains)
> +fw_domains_reset(struct drm_i915_private *dev_priv, enum fw_domains fw_domains)
>  {
>  	struct intel_uncore_forcewake_domain *d;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	for_each_fw_domain_mask(d, fw_domains, dev_priv, id)
>  		fw_domain_reset(d);
> @@ -181,7 +181,7 @@ static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
>  }
>  
>  static void fw_domains_get_with_thread_status(struct drm_i915_private *dev_priv,
> -					      int fw_domains)
> +					      enum fw_domains fw_domains)
>  {
>  	fw_domains_get(dev_priv, fw_domains);
>  
> @@ -199,7 +199,7 @@ static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
>  }
>  
>  static void fw_domains_put_with_fifo(struct drm_i915_private *dev_priv,
> -				     int fw_domains)
> +				     enum fw_domains fw_domains)
>  {
>  	fw_domains_put(dev_priv, fw_domains);
>  	gen6_gt_check_fifodbg(dev_priv);
> @@ -251,9 +251,10 @@ static void intel_uncore_fw_release_timer(unsigned long arg)
>  void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
>  {
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> -	unsigned long irqflags, fw = 0;
> +	unsigned long irqflags;
>  	struct intel_uncore_forcewake_domain *domain;
> -	int id;
> +	enum fw_domain_id id;
> +	enum fw_domains fw = 0;
>  
>  	/* Hold uncore.lock across reset to prevent any register access
>  	 * with forcewake not set correctly
> @@ -329,11 +330,11 @@ void intel_uncore_sanitize(struct drm_device *dev)
>   * intel_uncore_forcewake_put() at the end of the sequence.
>   */
>  void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
> -				unsigned fw_domains)
> +				enum fw_domains fw_domains)
>  {
>  	unsigned long irqflags;
>  	struct intel_uncore_forcewake_domain *domain;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	if (!dev_priv->uncore.funcs.force_wake_get)
>  		return;
> @@ -358,11 +359,11 @@ void intel_uncore_forcewake_get(struct drm_i915_private *dev_priv,
>   * see intel_uncore_forcewake_get()
>   */
>  void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
> -				unsigned fw_domains)
> +				enum fw_domains fw_domains)
>  {
>  	unsigned long irqflags;
>  	struct intel_uncore_forcewake_domain *domain;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	if (!dev_priv->uncore.funcs.force_wake_put)
>  		return;
> @@ -386,7 +387,7 @@ void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
>  void assert_forcewakes_inactive(struct drm_i915_private *dev_priv)
>  {
>  	struct intel_uncore_forcewake_domain *domain;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	if (!dev_priv->uncore.funcs.force_wake_get)
>  		return;
> @@ -559,10 +560,10 @@ __gen2_read(64)
>  	return val
>  
>  static inline void __force_wake_get(struct drm_i915_private *dev_priv,
> -				    unsigned fw_domains)
> +				    enum fw_domains fw_domains)
>  {
>  	struct intel_uncore_forcewake_domain *domain;
> -	int id;
> +	enum fw_domain_id id;
>  
>  	if (WARN_ON(!fw_domains))
>  		return;
> @@ -626,7 +627,7 @@ chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
>  #define __gen9_read(x) \
>  static u##x \
>  gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
> -	unsigned fw_engine; \
> +	enum fw_domains fw_engine; \
>  	GEN6_READ_HEADER(x); \
>  	if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)))	\
>  		fw_engine = 0; \
> @@ -826,7 +827,7 @@ static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg)
>  static void \
>  gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \
>  		bool trace) { \
> -	unsigned fw_engine; \
> +	enum fw_domains fw_engine; \
>  	GEN6_WRITE_HEADER; \
>  	if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) ||	\
>  	    is_gen9_shadowed(dev_priv, reg)) \
> @@ -892,7 +893,7 @@ do { \
>  
>  
>  static void fw_domain_init(struct drm_i915_private *dev_priv,
> -			   u32 domain_id, u32 reg_set, u32 reg_ack)
> +			   enum fw_domain_id domain_id, u32 reg_set, u32 reg_ack)
>  {
>  	struct intel_uncore_forcewake_domain *d;
>  
> -- 
> 1.9.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Jani Nikula, Intel Open Source Technology Center
_______________________________________________
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Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/intel-gfx





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