Mesa (master): i965: Cite the 965 PRM for " the data cache is the sampler cache".

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 3f64cfabfc0bae7f5dba9d541680edcc6b745cea
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3f64cfabfc0bae7f5dba9d541680edcc6b745cea

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Wed Jul 10 13:18:34 2013 -0700

i965: Cite the 965 PRM for "the data cache is the sampler cache".

Presumably, this comment exists to justify the usage of
I915_GEM_DOMAIN_SAMPLER for this relocation.  At one point, this was
necessary to ensure that the right flushing was done to keep caches
coherent.  These days, the kernel just flushes everything, so I don't
think it matters.

Still, the comment is interesting, so leave it in place.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/brw_wm_surface_state.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index c678919..8847f91 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -347,9 +347,9 @@ brw_create_constant_surface(struct brw_context *brw,
    surf[4] = 0;
    surf[5] = 0;
 
-   /* Emit relocation to surface contents.  Section 5.1.1 of the gen4
-    * bspec ("Data Cache") says that the data cache does not exist as
-    * a separate cache and is just the sampler cache.
+   /* Emit relocation to surface contents.  The 965 PRM, Volume 4, section
+    * 5.1.2 "Data Cache" says: "the data cache does not exist as a separate
+    * physical cache.  It is mapped in hardware to the sampler cache."
     */
    drm_intel_bo_emit_reloc(brw->batch.bo,
 			   *out_offset + 4,