Re: [PATCH 1/2] drm/i915: Introduce INTEL_GEN_RANGE macro

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On 06/05/16 15:33, Chris Wilson wrote:
On Fri, May 06, 2016 at 03:16:25PM +0100, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

To be used for more efficient Gen range checking.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
  drivers/gpu/drm/i915/i915_drv.h         |  1 +
  drivers/gpu/drm/i915/intel_fbc.c        |  2 +-
  drivers/gpu/drm/i915/intel_ringbuffer.c | 12 ++++++------
  3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 15fcbcece13c..935e381407ba 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2518,6 +2518,7 @@ struct drm_i915_cmd_table {
  })
  #define INTEL_INFO(p) 	(&__I915__(p)->info)
  #define INTEL_GEN(p)	(INTEL_INFO(p)->gen)
+#define INTEL_GEN_RANGE(p, s, e) (INTEL_INFO(p)->gen_mask & GENMASK(e, s))
  #define INTEL_DEVID(p)	(INTEL_INFO(p)->device_id)
  #define INTEL_REVID(p)	(__I915__(p)->dev->pdev->revision)

diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index d5a7cfec589b..2c3681757aba 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -740,7 +740,7 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc)

  	/* FIXME: We lack the proper locking here, so only run this on the
  	 * platforms that need. */
-	if (INTEL_INFO(dev_priv)->gen >= 5 && INTEL_INFO(dev_priv)->gen < 7)
+	if (INTEL_GEN_RANGE(dev_priv, 5, 6))
  		cache->fb.ilk_ggtt_offset = i915_gem_obj_ggtt_offset(obj);
  	cache->fb.pixel_format = fb->pixel_format;
  	cache->fb.stride = fb->pitches[0];
@@ -1241,12 +1241,12 @@ static int init_render_ring(struct intel_engine_cs *engine)
  			   _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT));

  	/* WaBCSVCSTlbInvalidationMode:ivb,vlv,hsw */
-	if (IS_GEN7(dev))
+	if (IS_GEN7(dev_priv))
  		I915_WRITE(GFX_MODE_GEN7,
  			   _MASKED_BIT_ENABLE(GFX_TLB_INVALIDATE_EXPLICIT) |
  			   _MASKED_BIT_ENABLE(GFX_REPLAY_MODE));

-	if (IS_GEN6(dev)) {
+	if (IS_GEN6(dev_priv)) {

This chunk shouldn't be in this patch.

Couldn't improve upon INTEL_GEN_RANGE.

Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
-Chris

INTEL_GEN_IN_RANGE() ?

Perhaps emphasises that we're using INclusive ranges?

(whereas the open-coded version might use inclusive or exclusive or semi-inclusive at either end, as in the example above.)

.Dave.
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