From: ville.syrjala@linux.intel.com
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 4/8] intel-gtt: Assume last 128KB of stolen contains the GTT entries on gen2
Date: Thu, 28 Nov 2013 17:15:06 +0200 [thread overview]
Message-ID: <1385651710-7768-5-git-send-email-ville.syrjala@linux.intel.com> (raw)
In-Reply-To: <1385651710-7768-1-git-send-email-ville.syrjala@linux.intel.com>
From: Ville Syrjälä <ville.syrjala@linux.intel.com>
At least on my MGM the last 128KB of, what I assume is the stolen memory
region, contains the GTT entries. Let's assume that holds for all gen2
platforms.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/char/agp/intel-gtt.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 99ff699..35788a2 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -430,6 +430,10 @@ static unsigned int intel_gtt_stolen_size(bool *has_local_memory)
}
}
+ /* Assume GTT entries occupy the last 128KB of stolen/local memory. */
+ if (stolen_size > 0 && INTEL_GTT_GEN == 2)
+ stolen_size -= KB(128);
+
if (stolen_size > 0) {
dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n",
stolen_size / KB(1), *has_local_memory ? "local" : "stolen");
--
1.8.3.2
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next prev parent reply other threads:[~2013-11-28 15:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-28 15:15 [PATCH 0/8] Gen2 stolen/local memory support ville.syrjala
2013-11-28 15:15 ` [PATCH 1/8] x86: Add vfunc for Intel graphics stolen memory base address ville.syrjala
2013-11-28 15:15 ` [PATCH 2/8] x86: Add Intel graphics stolen memory quirk for gen2 platforms ville.syrjala
2013-11-30 12:58 ` Ingo Molnar
2013-11-28 15:15 ` [PATCH 3/8] intel-gtt: Return whether we have local memory or not ville.syrjala
2013-11-28 15:15 ` ville.syrjala [this message]
2013-11-28 15:15 ` [PATCH 5/8] intel-gtt: Use i810_write_entry() on gen2 platforms ville.syrjala
2013-11-28 15:15 ` [PATCH 6/8] drm/i915: Add I915_CACHE_LOCAL to indicate local memory ville.syrjala
2013-11-28 15:15 ` [PATCH 7/8] drm/i915: Keep track if we have " ville.syrjala
2013-11-28 15:15 ` [PATCH 8/8] drm/i915: Determine the stolen memory base address on gen2 ville.syrjala
2013-11-28 16:32 ` Chris Wilson
2013-11-28 18:01 ` Ville Syrjälä
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