[Intel-gfx] [PATCH 03/12] drm/i915: make PDE|PTE platform specific

[Ben Widawsky]

Accomplish this be removing the PDE count define which is (and has
always been) part of the PPGTT structure anyway. With the addition of
the gen specific init function, we can nicely tuck away the magic number
in there.

In this vain, make the PTE define less of a magic number.

The remaining code in the global gtt setup is a bit messy, but an
upcoming patch will clean that one up.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_drv.h     |  2 --
 drivers/gpu/drm/i915/i915_gem_gtt.c | 10 +++++-----
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index d5dcf7f..0a9c7cd 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -431,8 +431,6 @@ struct i915_gtt {
 };
 #define gtt_total_entries(gtt) ((gtt).total >> PAGE_SHIFT)
 
-#define I915_PPGTT_PD_ENTRIES 512
-#define I915_PPGTT_PT_ENTRIES 1024
 struct i915_hw_ppgtt {
 	struct drm_device *dev;
 	unsigned num_pd_entries;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 0503f09..11a50cf 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -29,6 +29,7 @@
 #include "intel_drv.h"
 
 typedef uint32_t gen6_gtt_pte_t;
+#define I915_PPGTT_PT_ENTRIES (PAGE_SIZE / sizeof(gen6_gtt_pte_t))
 
 /* PPGTT stuff */
 #define GEN6_GTT_ADDR_ENCODE(addr)	((addr) | (((addr) >> 28) & 0xff0))
@@ -235,10 +236,9 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
 	/* ppgtt PDEs reside in the global gtt pagetable, which has 512*1024
 	 * entries. For aliasing ppgtt support we just steal them at the end for
 	 * now. */
-	first_pd_entry_in_global_pt =
-		gtt_total_entries(dev_priv->gtt) - I915_PPGTT_PD_ENTRIES;
+	first_pd_entry_in_global_pt = gtt_total_entries(dev_priv->gtt) - 512;
 
-	ppgtt->num_pd_entries = I915_PPGTT_PD_ENTRIES;
+	ppgtt->num_pd_entries = 512;
 	ppgtt->enable = gen6_ppgtt_enable;
 	ppgtt->clear_range = gen6_ppgtt_clear_range;
 	ppgtt->insert_entries = gen6_ppgtt_insert_entries;
@@ -646,7 +646,7 @@ void i915_gem_init_global_gtt(struct drm_device *dev)
 		if (INTEL_INFO(dev)->gen <= 7) {
 			/* PPGTT pdes are stolen from global gtt ptes, so shrink the
 			 * aperture accordingly when using aliasing ppgtt. */
-			gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE;
+			gtt_size -= 512 * PAGE_SIZE;
 		}
 
 		i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size);
@@ -657,7 +657,7 @@ void i915_gem_init_global_gtt(struct drm_device *dev)
 
 		DRM_ERROR("Aliased PPGTT setup failed %d\n", ret);
 		drm_mm_takedown(&dev_priv->mm.gtt_space);
-		gtt_size += I915_PPGTT_PD_ENTRIES*PAGE_SIZE;
+		gtt_size += 512 * PAGE_SIZE;
 	}
 	i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size);
 }
-- 
1.8.2.1