[Intel-gfx] [PATCH 01/10] drm/i915: drm/i915: create macros for the "unclaimed register" checks

[Daniel Vetter]

On Fri, Feb 08, 2013 at 05:35:12PM -0200, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> 
> This avoids polluting i915_write##x and also allows us to reuse code
> on i915_read##x.
> 
> v2: Rebase
> 
> Reviewed-by: Ben Widawsky <ben at bwidawsk.net> (v1)
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>

Checkpatch complained about the macro parameters not being enclosed in
(reg) params. I tend to agree, so maybe just extract the entire thing into
a static inline function while at it?
-Daniel

> ---
>  drivers/gpu/drm/i915/i915_drv.c |   24 ++++++++++++++++--------
>  1 file changed, 16 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index c5b8c81..e24c337 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -1131,6 +1131,20 @@ ilk_dummy_write(struct drm_i915_private *dev_priv)
>  	I915_WRITE_NOTRACE(MI_MODE, 0);
>  }
>  
> +#define UNCLAIMED_REG_CLEAR(dev_priv, reg) \
> +	if (IS_HASWELL(dev_priv->dev) && \
> +	    (I915_READ_NOTRACE(GEN7_ERR_INT) & ERR_INT_MMIO_UNCLAIMED)) { \
> +		DRM_ERROR("Unknown unclaimed register before writing to %x\n", reg); \
> +		I915_WRITE_NOTRACE(GEN7_ERR_INT, ERR_INT_MMIO_UNCLAIMED); \
> +	}
> +
> +#define UNCLAIMED_REG_CHECK(dev_priv, reg) \
> +	if (IS_HASWELL(dev_priv->dev) && \
> +	    (I915_READ_NOTRACE(GEN7_ERR_INT) & ERR_INT_MMIO_UNCLAIMED)) { \
> +		DRM_ERROR("Unclaimed write to %x\n", reg); \
> +		writel(ERR_INT_MMIO_UNCLAIMED, dev_priv->regs + GEN7_ERR_INT); \
> +	}
> +
>  #define __i915_read(x, y) \
>  u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
>  	u##x val = 0; \
> @@ -1167,18 +1181,12 @@ void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
>  	} \
>  	if (IS_GEN5(dev_priv->dev)) \
>  		ilk_dummy_write(dev_priv); \
> -	if (IS_HASWELL(dev_priv->dev) && (I915_READ_NOTRACE(GEN7_ERR_INT) & ERR_INT_MMIO_UNCLAIMED)) { \
> -		DRM_ERROR("Unknown unclaimed register before writing to %x\n", reg); \
> -		I915_WRITE_NOTRACE(GEN7_ERR_INT, ERR_INT_MMIO_UNCLAIMED); \
> -	} \
> +	UNCLAIMED_REG_CLEAR(dev_priv, reg); \
>  	write##y(val, dev_priv->regs + reg); \
>  	if (unlikely(__fifo_ret)) { \
>  		gen6_gt_check_fifodbg(dev_priv); \
>  	} \
> -	if (IS_HASWELL(dev_priv->dev) && (I915_READ_NOTRACE(GEN7_ERR_INT) & ERR_INT_MMIO_UNCLAIMED)) { \
> -		DRM_ERROR("Unclaimed write to %x\n", reg); \
> -		writel(ERR_INT_MMIO_UNCLAIMED, dev_priv->regs + GEN7_ERR_INT);	\
> -	} \
> +	UNCLAIMED_REG_CHECK(dev_priv, reg); \
>  }
>  __i915_write(8, b)
>  __i915_write(16, w)
> -- 
> 1.7.10.4
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch